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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_registered)
67#define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registered)
68
69#define QED_LL2_TX_SIZE (256)
70#define QED_LL2_RX_SIZE (4096)
71
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
161static void qed_ll2b_complete_rx_packet(void *cxt,
162 struct qed_ll2_comp_rx_data *data)
163{
164 struct qed_hwfn *p_hwfn = cxt;
165 struct qed_ll2_buffer *buffer = data->cookie;
166 struct qed_dev *cdev = p_hwfn->cdev;
167 dma_addr_t new_phys_addr;
168 struct sk_buff *skb;
169 bool reuse = false;
170 int rc = -EINVAL;
171 u8 *new_data;
172
173 DP_VERBOSE(p_hwfn,
174 (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
175 "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n",
176 (u64)data->rx_buf_addr,
177 data->u.placement_offset,
178 data->length.packet_length,
179 data->parse_flags,
180 data->vlan, data->opaque_data_0, data->opaque_data_1);
181
182 if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
183 print_hex_dump(KERN_INFO, "",
184 DUMP_PREFIX_OFFSET, 16, 1,
185 buffer->data, data->length.packet_length, false);
186 }
187
188
189 if (data->length.packet_length < ETH_HLEN)
190 reuse = true;
191
192
193 if (!reuse)
194 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
195 &new_phys_addr);
196
197
198 if (rc)
199 goto out_post;
200 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
201 cdev->ll2->rx_size, DMA_FROM_DEVICE);
202
203 skb = build_skb(buffer->data, 0);
204 if (!skb) {
205 DP_INFO(cdev, "Failed to build SKB\n");
206 kfree(buffer->data);
207 goto out_post1;
208 }
209
210 data->u.placement_offset += NET_SKB_PAD;
211 skb_reserve(skb, data->u.placement_offset);
212 skb_put(skb, data->length.packet_length);
213 skb_checksum_none_assert(skb);
214
215
216
217
218 skb_reset_mac_header(skb);
219 skb->protocol = eth_hdr(skb)->h_proto;
220
221
222 if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
223 if (data->vlan)
224 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
225 data->vlan);
226 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
227 data->opaque_data_0,
228 data->opaque_data_1);
229 } else {
230 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
231 QED_MSG_LL2 | QED_MSG_STORAGE),
232 "Dropping the packet\n");
233 kfree(buffer->data);
234 }
235
236out_post1:
237
238 buffer->data = new_data;
239 buffer->phys_addr = new_phys_addr;
240
241out_post:
242 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
243 buffer->phys_addr, 0, buffer, 1);
244
245 if (rc)
246 qed_ll2_dealloc_buffer(cdev, buffer);
247}
248
249static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
250 u8 connection_handle,
251 bool b_lock,
252 bool b_only_active)
253{
254 struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
255
256 if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
257 return NULL;
258
259 if (!p_hwfn->p_ll2_info)
260 return NULL;
261
262 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
263
264 if (b_only_active) {
265 if (b_lock)
266 mutex_lock(&p_ll2_conn->mutex);
267 if (p_ll2_conn->b_active)
268 p_ret = p_ll2_conn;
269 if (b_lock)
270 mutex_unlock(&p_ll2_conn->mutex);
271 } else {
272 p_ret = p_ll2_conn;
273 }
274
275 return p_ret;
276}
277
278static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
279 u8 connection_handle)
280{
281 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
282}
283
284static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
285 u8 connection_handle)
286{
287 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
288}
289
290static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
291 *p_hwfn,
292 u8 connection_handle)
293{
294 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
295}
296
297static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
298{
299 bool b_last_packet = false, b_last_frag = false;
300 struct qed_ll2_tx_packet *p_pkt = NULL;
301 struct qed_ll2_info *p_ll2_conn;
302 struct qed_ll2_tx_queue *p_tx;
303 unsigned long flags = 0;
304 dma_addr_t tx_frag;
305
306 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
307 if (!p_ll2_conn)
308 return;
309
310 p_tx = &p_ll2_conn->tx_queue;
311
312 spin_lock_irqsave(&p_tx->lock, flags);
313 while (!list_empty(&p_tx->active_descq)) {
314 p_pkt = list_first_entry(&p_tx->active_descq,
315 struct qed_ll2_tx_packet, list_entry);
316 if (!p_pkt)
317 break;
318
319 list_del(&p_pkt->list_entry);
320 b_last_packet = list_empty(&p_tx->active_descq);
321 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
322 spin_unlock_irqrestore(&p_tx->lock, flags);
323 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
324 struct qed_ooo_buffer *p_buffer;
325
326 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
327 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
328 p_buffer);
329 } else {
330 p_tx->cur_completing_packet = *p_pkt;
331 p_tx->cur_completing_bd_idx = 1;
332 b_last_frag =
333 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
334 tx_frag = p_pkt->bds_set[0].tx_frag;
335 p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
336 p_ll2_conn->my_id,
337 p_pkt->cookie,
338 tx_frag,
339 b_last_frag,
340 b_last_packet);
341 }
342 spin_lock_irqsave(&p_tx->lock, flags);
343 }
344 spin_unlock_irqrestore(&p_tx->lock, flags);
345}
346
347static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
348{
349 struct qed_ll2_info *p_ll2_conn = p_cookie;
350 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
351 u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
352 struct qed_ll2_tx_packet *p_pkt;
353 bool b_last_frag = false;
354 unsigned long flags;
355 int rc = -EINVAL;
356
357 spin_lock_irqsave(&p_tx->lock, flags);
358 if (p_tx->b_completing_packet) {
359 rc = -EBUSY;
360 goto out;
361 }
362
363 new_idx = le16_to_cpu(*p_tx->p_fw_cons);
364 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
365 while (num_bds) {
366 if (list_empty(&p_tx->active_descq))
367 goto out;
368
369 p_pkt = list_first_entry(&p_tx->active_descq,
370 struct qed_ll2_tx_packet, list_entry);
371 if (!p_pkt)
372 goto out;
373
374 p_tx->b_completing_packet = true;
375 p_tx->cur_completing_packet = *p_pkt;
376 num_bds_in_packet = p_pkt->bd_used;
377 list_del(&p_pkt->list_entry);
378
379 if (num_bds < num_bds_in_packet) {
380 DP_NOTICE(p_hwfn,
381 "Rest of BDs does not cover whole packet\n");
382 goto out;
383 }
384
385 num_bds -= num_bds_in_packet;
386 p_tx->bds_idx += num_bds_in_packet;
387 while (num_bds_in_packet--)
388 qed_chain_consume(&p_tx->txq_chain);
389
390 p_tx->cur_completing_bd_idx = 1;
391 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
392 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
393
394 spin_unlock_irqrestore(&p_tx->lock, flags);
395
396 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
397 p_ll2_conn->my_id,
398 p_pkt->cookie,
399 p_pkt->bds_set[0].tx_frag,
400 b_last_frag, !num_bds);
401
402 spin_lock_irqsave(&p_tx->lock, flags);
403 }
404
405 p_tx->b_completing_packet = false;
406 rc = 0;
407out:
408 spin_unlock_irqrestore(&p_tx->lock, flags);
409 return rc;
410}
411
412static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
413 union core_rx_cqe_union *p_cqe,
414 struct qed_ll2_comp_rx_data *data)
415{
416 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
417 data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
418 data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
419 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
420 data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
421 data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
422 data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
423
424 data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
425}
426
427static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
428 union core_rx_cqe_union *p_cqe,
429 struct qed_ll2_comp_rx_data *data)
430{
431 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
432 data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
433 data->length.packet_length =
434 le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
435 data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
436 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
437 data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
438 data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
439}
440
441static int
442qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
443 struct qed_ll2_info *p_ll2_conn,
444 union core_rx_cqe_union *p_cqe,
445 unsigned long *p_lock_flags)
446{
447 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
448 struct core_rx_slow_path_cqe *sp_cqe;
449
450 sp_cqe = &p_cqe->rx_cqe_sp;
451 if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
452 DP_NOTICE(p_hwfn,
453 "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
454 sp_cqe->ramrod_cmd_id);
455 return -EINVAL;
456 }
457
458 if (!p_ll2_conn->cbs.slowpath_cb) {
459 DP_NOTICE(p_hwfn,
460 "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
461 return -EINVAL;
462 }
463
464 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
465
466 p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
467 p_ll2_conn->my_id,
468 le32_to_cpu(sp_cqe->opaque_data.data[0]),
469 le32_to_cpu(sp_cqe->opaque_data.data[1]));
470
471 spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
472
473 return 0;
474}
475
476static int
477qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
478 struct qed_ll2_info *p_ll2_conn,
479 union core_rx_cqe_union *p_cqe,
480 unsigned long *p_lock_flags, bool b_last_cqe)
481{
482 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
483 struct qed_ll2_rx_packet *p_pkt = NULL;
484 struct qed_ll2_comp_rx_data data;
485
486 if (!list_empty(&p_rx->active_descq))
487 p_pkt = list_first_entry(&p_rx->active_descq,
488 struct qed_ll2_rx_packet, list_entry);
489 if (!p_pkt) {
490 DP_NOTICE(p_hwfn,
491 "[%d] LL2 Rx completion but active_descq is empty\n",
492 p_ll2_conn->input.conn_type);
493
494 return -EIO;
495 }
496 list_del(&p_pkt->list_entry);
497
498 if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
499 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
500 else
501 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
502 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
503 DP_NOTICE(p_hwfn,
504 "Mismatch between active_descq and the LL2 Rx chain\n");
505
506 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
507
508 data.connection_handle = p_ll2_conn->my_id;
509 data.cookie = p_pkt->cookie;
510 data.rx_buf_addr = p_pkt->rx_buf_addr;
511 data.b_last_packet = b_last_cqe;
512
513 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
514 p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
515
516 spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
517
518 return 0;
519}
520
521static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
522{
523 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
524 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
525 union core_rx_cqe_union *cqe = NULL;
526 u16 cq_new_idx = 0, cq_old_idx = 0;
527 unsigned long flags = 0;
528 int rc = 0;
529
530 spin_lock_irqsave(&p_rx->lock, flags);
531 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
532 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
533
534 while (cq_new_idx != cq_old_idx) {
535 bool b_last_cqe = (cq_new_idx == cq_old_idx);
536
537 cqe =
538 (union core_rx_cqe_union *)
539 qed_chain_consume(&p_rx->rcq_chain);
540 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
541
542 DP_VERBOSE(p_hwfn,
543 QED_MSG_LL2,
544 "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
545 cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
546
547 switch (cqe->rx_cqe_sp.type) {
548 case CORE_RX_CQE_TYPE_SLOW_PATH:
549 rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
550 cqe, &flags);
551 break;
552 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
553 case CORE_RX_CQE_TYPE_REGULAR:
554 rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
555 cqe, &flags,
556 b_last_cqe);
557 break;
558 default:
559 rc = -EIO;
560 }
561 }
562
563 spin_unlock_irqrestore(&p_rx->lock, flags);
564 return rc;
565}
566
567static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
568{
569 struct qed_ll2_info *p_ll2_conn = NULL;
570 struct qed_ll2_rx_packet *p_pkt = NULL;
571 struct qed_ll2_rx_queue *p_rx;
572 unsigned long flags = 0;
573
574 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
575 if (!p_ll2_conn)
576 return;
577
578 p_rx = &p_ll2_conn->rx_queue;
579
580 spin_lock_irqsave(&p_rx->lock, flags);
581 while (!list_empty(&p_rx->active_descq)) {
582 p_pkt = list_first_entry(&p_rx->active_descq,
583 struct qed_ll2_rx_packet, list_entry);
584 if (!p_pkt)
585 break;
586 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
587 spin_unlock_irqrestore(&p_rx->lock, flags);
588
589 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
590 struct qed_ooo_buffer *p_buffer;
591
592 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
593 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
594 p_buffer);
595 } else {
596 dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
597 void *cookie = p_pkt->cookie;
598 bool b_last;
599
600 b_last = list_empty(&p_rx->active_descq);
601 p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
602 p_ll2_conn->my_id,
603 cookie,
604 rx_buf_addr, b_last);
605 }
606 spin_lock_irqsave(&p_rx->lock, flags);
607 }
608 spin_unlock_irqrestore(&p_rx->lock, flags);
609}
610
611static bool
612qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
613 struct core_rx_slow_path_cqe *p_cqe)
614{
615 struct ooo_opaque *iscsi_ooo;
616 u32 cid;
617
618 if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
619 return false;
620
621 iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data;
622 if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES)
623 return false;
624
625
626 cid = le32_to_cpu(iscsi_ooo->cid);
627 qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
628
629 return true;
630}
631
632static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
633 struct qed_ll2_info *p_ll2_conn)
634{
635 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
636 u16 packet_length = 0, parse_flags = 0, vlan = 0;
637 struct qed_ll2_rx_packet *p_pkt = NULL;
638 u32 num_ooo_add_to_peninsula = 0, cid;
639 union core_rx_cqe_union *cqe = NULL;
640 u16 cq_new_idx = 0, cq_old_idx = 0;
641 struct qed_ooo_buffer *p_buffer;
642 struct ooo_opaque *iscsi_ooo;
643 u8 placement_offset = 0;
644 u8 cqe_type;
645
646 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
647 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
648 if (cq_new_idx == cq_old_idx)
649 return 0;
650
651 while (cq_new_idx != cq_old_idx) {
652 struct core_rx_fast_path_cqe *p_cqe_fp;
653
654 cqe = qed_chain_consume(&p_rx->rcq_chain);
655 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
656 cqe_type = cqe->rx_cqe_sp.type;
657
658 if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
659 if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
660 &cqe->rx_cqe_sp))
661 continue;
662
663 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
664 DP_NOTICE(p_hwfn,
665 "Got a non-regular LB LL2 completion [type 0x%02x]\n",
666 cqe_type);
667 return -EINVAL;
668 }
669 p_cqe_fp = &cqe->rx_cqe_fp;
670
671 placement_offset = p_cqe_fp->placement_offset;
672 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
673 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
674 vlan = le16_to_cpu(p_cqe_fp->vlan);
675 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
676 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
677 iscsi_ooo);
678 cid = le32_to_cpu(iscsi_ooo->cid);
679
680
681 if (iscsi_ooo->drop_size)
682 qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
683 iscsi_ooo->drop_isle,
684 iscsi_ooo->drop_size);
685
686 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
687 continue;
688
689
690 if (list_empty(&p_rx->active_descq)) {
691 DP_NOTICE(p_hwfn,
692 "LL2 OOO RX chain has no submitted buffers\n"
693 );
694 return -EIO;
695 }
696
697 p_pkt = list_first_entry(&p_rx->active_descq,
698 struct qed_ll2_rx_packet, list_entry);
699
700 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
701 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
702 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
703 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
704 (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
705 if (!p_pkt) {
706 DP_NOTICE(p_hwfn,
707 "LL2 OOO RX packet is not valid\n");
708 return -EIO;
709 }
710 list_del(&p_pkt->list_entry);
711 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
712 p_buffer->packet_length = packet_length;
713 p_buffer->parse_flags = parse_flags;
714 p_buffer->vlan = vlan;
715 p_buffer->placement_offset = placement_offset;
716 qed_chain_consume(&p_rx->rxq_chain);
717 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
718
719 switch (iscsi_ooo->ooo_opcode) {
720 case TCP_EVENT_ADD_NEW_ISLE:
721 qed_ooo_add_new_isle(p_hwfn,
722 p_hwfn->p_ooo_info,
723 cid,
724 iscsi_ooo->ooo_isle,
725 p_buffer);
726 break;
727 case TCP_EVENT_ADD_ISLE_RIGHT:
728 qed_ooo_add_new_buffer(p_hwfn,
729 p_hwfn->p_ooo_info,
730 cid,
731 iscsi_ooo->ooo_isle,
732 p_buffer,
733 QED_OOO_RIGHT_BUF);
734 break;
735 case TCP_EVENT_ADD_ISLE_LEFT:
736 qed_ooo_add_new_buffer(p_hwfn,
737 p_hwfn->p_ooo_info,
738 cid,
739 iscsi_ooo->ooo_isle,
740 p_buffer,
741 QED_OOO_LEFT_BUF);
742 break;
743 case TCP_EVENT_JOIN:
744 qed_ooo_add_new_buffer(p_hwfn,
745 p_hwfn->p_ooo_info,
746 cid,
747 iscsi_ooo->ooo_isle +
748 1,
749 p_buffer,
750 QED_OOO_LEFT_BUF);
751 qed_ooo_join_isles(p_hwfn,
752 p_hwfn->p_ooo_info,
753 cid, iscsi_ooo->ooo_isle);
754 break;
755 case TCP_EVENT_ADD_PEN:
756 num_ooo_add_to_peninsula++;
757 qed_ooo_put_ready_buffer(p_hwfn,
758 p_hwfn->p_ooo_info,
759 p_buffer, true);
760 break;
761 }
762 } else {
763 DP_NOTICE(p_hwfn,
764 "Unexpected event (%d) TX OOO completion\n",
765 iscsi_ooo->ooo_opcode);
766 }
767 }
768
769 return 0;
770}
771
772static void
773qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
774 struct qed_ll2_info *p_ll2_conn)
775{
776 struct qed_ll2_tx_pkt_info tx_pkt;
777 struct qed_ooo_buffer *p_buffer;
778 u16 l4_hdr_offset_w;
779 dma_addr_t first_frag;
780 u8 bd_flags;
781 int rc;
782
783
784 while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
785 p_hwfn->p_ooo_info))) {
786 l4_hdr_offset_w = 0;
787 bd_flags = 0;
788
789 first_frag = p_buffer->rx_buffer_phys_addr +
790 p_buffer->placement_offset;
791 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
792 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
793
794 memset(&tx_pkt, 0, sizeof(tx_pkt));
795 tx_pkt.num_of_bds = 1;
796 tx_pkt.vlan = p_buffer->vlan;
797 tx_pkt.bd_flags = bd_flags;
798 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
799 switch (p_ll2_conn->tx_dest) {
800 case CORE_TX_DEST_NW:
801 tx_pkt.tx_dest = QED_LL2_TX_DEST_NW;
802 break;
803 case CORE_TX_DEST_LB:
804 tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
805 break;
806 case CORE_TX_DEST_DROP:
807 default:
808 tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
809 break;
810 }
811 tx_pkt.first_frag = first_frag;
812 tx_pkt.first_frag_len = p_buffer->packet_length;
813 tx_pkt.cookie = p_buffer;
814
815 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
816 &tx_pkt, true);
817 if (rc) {
818 qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
819 p_buffer, false);
820 break;
821 }
822 }
823}
824
825static void
826qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
827 struct qed_ll2_info *p_ll2_conn)
828{
829 struct qed_ooo_buffer *p_buffer;
830 int rc;
831
832 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
833 p_hwfn->p_ooo_info))) {
834 rc = qed_ll2_post_rx_buffer(p_hwfn,
835 p_ll2_conn->my_id,
836 p_buffer->rx_buffer_phys_addr,
837 0, p_buffer, true);
838 if (rc) {
839 qed_ooo_put_free_buffer(p_hwfn,
840 p_hwfn->p_ooo_info, p_buffer);
841 break;
842 }
843 }
844}
845
846static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
847{
848 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
849 int rc;
850
851 if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
852 return 0;
853
854 rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
855 if (rc)
856 return rc;
857
858 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
859 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
860
861 return 0;
862}
863
864static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
865{
866 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
867 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
868 struct qed_ll2_tx_packet *p_pkt = NULL;
869 struct qed_ooo_buffer *p_buffer;
870 bool b_dont_submit_rx = false;
871 u16 new_idx = 0, num_bds = 0;
872 int rc;
873
874 if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
875 return 0;
876
877 new_idx = le16_to_cpu(*p_tx->p_fw_cons);
878 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
879
880 if (!num_bds)
881 return 0;
882
883 while (num_bds) {
884 if (list_empty(&p_tx->active_descq))
885 return -EINVAL;
886
887 p_pkt = list_first_entry(&p_tx->active_descq,
888 struct qed_ll2_tx_packet, list_entry);
889 if (!p_pkt)
890 return -EINVAL;
891
892 if (p_pkt->bd_used != 1) {
893 DP_NOTICE(p_hwfn,
894 "Unexpectedly many BDs(%d) in TX OOO completion\n",
895 p_pkt->bd_used);
896 return -EINVAL;
897 }
898
899 list_del(&p_pkt->list_entry);
900
901 num_bds--;
902 p_tx->bds_idx++;
903 qed_chain_consume(&p_tx->txq_chain);
904
905 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
906 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
907
908 if (b_dont_submit_rx) {
909 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
910 p_buffer);
911 continue;
912 }
913
914 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
915 p_buffer->rx_buffer_phys_addr, 0,
916 p_buffer, true);
917 if (rc != 0) {
918 qed_ooo_put_free_buffer(p_hwfn,
919 p_hwfn->p_ooo_info, p_buffer);
920 b_dont_submit_rx = true;
921 }
922 }
923
924 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
925
926 return 0;
927}
928
929static void qed_ll2_stop_ooo(struct qed_dev *cdev)
930{
931 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
932 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
933
934 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n",
935 *handle);
936
937 qed_ll2_terminate_connection(hwfn, *handle);
938 qed_ll2_release_connection(hwfn, *handle);
939 *handle = QED_LL2_UNUSED_HANDLE;
940}
941
942static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
943 struct qed_ll2_info *p_ll2_conn,
944 u8 action_on_error)
945{
946 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
947 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
948 struct core_rx_start_ramrod_data *p_ramrod = NULL;
949 struct qed_spq_entry *p_ent = NULL;
950 struct qed_sp_init_data init_data;
951 u16 cqe_pbl_size;
952 int rc = 0;
953
954
955 memset(&init_data, 0, sizeof(init_data));
956 init_data.cid = p_ll2_conn->cid;
957 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
958 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
959
960 rc = qed_sp_init_request(p_hwfn, &p_ent,
961 CORE_RAMROD_RX_QUEUE_START,
962 PROTOCOLID_CORE, &init_data);
963 if (rc)
964 return rc;
965
966 p_ramrod = &p_ent->ramrod.core_rx_queue_start;
967
968 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
969 p_ramrod->sb_index = p_rx->rx_sb_index;
970 p_ramrod->complete_event_flg = 1;
971
972 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
973 DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
974 cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
975 p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
976 DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
977 qed_chain_get_pbl_phys(&p_rx->rcq_chain));
978
979 p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
980 p_ramrod->inner_vlan_stripping_en =
981 p_ll2_conn->input.rx_vlan_removal_en;
982
983 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
984 p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE)
985 p_ramrod->report_outer_vlan = 1;
986 p_ramrod->queue_id = p_ll2_conn->queue_id;
987 p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
988
989 if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) &&
990 p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE &&
991 conn_type != QED_LL2_TYPE_IWARP) {
992 p_ramrod->mf_si_bcast_accept_all = 1;
993 p_ramrod->mf_si_mcast_accept_all = 1;
994 } else {
995 p_ramrod->mf_si_bcast_accept_all = 0;
996 p_ramrod->mf_si_mcast_accept_all = 0;
997 }
998
999 p_ramrod->action_on_error.error_type = action_on_error;
1000 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1001 return qed_spq_post(p_hwfn, p_ent, NULL);
1002}
1003
1004static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
1005 struct qed_ll2_info *p_ll2_conn)
1006{
1007 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
1008 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1009 struct core_tx_start_ramrod_data *p_ramrod = NULL;
1010 struct qed_spq_entry *p_ent = NULL;
1011 struct qed_sp_init_data init_data;
1012 u16 pq_id = 0, pbl_size;
1013 int rc = -EINVAL;
1014
1015 if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
1016 return 0;
1017
1018 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1019 p_ll2_conn->tx_stats_en = 0;
1020 else
1021 p_ll2_conn->tx_stats_en = 1;
1022
1023
1024 memset(&init_data, 0, sizeof(init_data));
1025 init_data.cid = p_ll2_conn->cid;
1026 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1027 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1028
1029 rc = qed_sp_init_request(p_hwfn, &p_ent,
1030 CORE_RAMROD_TX_QUEUE_START,
1031 PROTOCOLID_CORE, &init_data);
1032 if (rc)
1033 return rc;
1034
1035 p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1036
1037 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1038 p_ramrod->sb_index = p_tx->tx_sb_index;
1039 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1040 p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1041 p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1042
1043 DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1044 qed_chain_get_pbl_phys(&p_tx->txq_chain));
1045 pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1046 p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1047
1048 switch (p_ll2_conn->input.tx_tc) {
1049 case PURE_LB_TC:
1050 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1051 break;
1052 case PKT_LB_TC:
1053 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1054 break;
1055 default:
1056 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1057 break;
1058 }
1059
1060 p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1061
1062 switch (conn_type) {
1063 case QED_LL2_TYPE_FCOE:
1064 p_ramrod->conn_type = PROTOCOLID_FCOE;
1065 break;
1066 case QED_LL2_TYPE_ISCSI:
1067 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1068 break;
1069 case QED_LL2_TYPE_ROCE:
1070 p_ramrod->conn_type = PROTOCOLID_ROCE;
1071 break;
1072 case QED_LL2_TYPE_IWARP:
1073 p_ramrod->conn_type = PROTOCOLID_IWARP;
1074 break;
1075 case QED_LL2_TYPE_OOO:
1076 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI)
1077 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1078 else
1079 p_ramrod->conn_type = PROTOCOLID_IWARP;
1080 break;
1081 default:
1082 p_ramrod->conn_type = PROTOCOLID_ETH;
1083 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1084 }
1085
1086 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1087
1088 rc = qed_spq_post(p_hwfn, p_ent, NULL);
1089 if (rc)
1090 return rc;
1091
1092 rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1093 &p_tx->db_msg, DB_REC_WIDTH_32B,
1094 DB_REC_KERNEL);
1095 return rc;
1096}
1097
1098static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1099 struct qed_ll2_info *p_ll2_conn)
1100{
1101 struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1102 struct qed_spq_entry *p_ent = NULL;
1103 struct qed_sp_init_data init_data;
1104 int rc = -EINVAL;
1105
1106
1107 memset(&init_data, 0, sizeof(init_data));
1108 init_data.cid = p_ll2_conn->cid;
1109 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1110 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1111
1112 rc = qed_sp_init_request(p_hwfn, &p_ent,
1113 CORE_RAMROD_RX_QUEUE_STOP,
1114 PROTOCOLID_CORE, &init_data);
1115 if (rc)
1116 return rc;
1117
1118 p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1119
1120 p_ramrod->complete_event_flg = 1;
1121 p_ramrod->queue_id = p_ll2_conn->queue_id;
1122
1123 return qed_spq_post(p_hwfn, p_ent, NULL);
1124}
1125
1126static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1127 struct qed_ll2_info *p_ll2_conn)
1128{
1129 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1130 struct qed_spq_entry *p_ent = NULL;
1131 struct qed_sp_init_data init_data;
1132 int rc = -EINVAL;
1133 qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1134
1135
1136 memset(&init_data, 0, sizeof(init_data));
1137 init_data.cid = p_ll2_conn->cid;
1138 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1139 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1140
1141 rc = qed_sp_init_request(p_hwfn, &p_ent,
1142 CORE_RAMROD_TX_QUEUE_STOP,
1143 PROTOCOLID_CORE, &init_data);
1144 if (rc)
1145 return rc;
1146
1147 return qed_spq_post(p_hwfn, p_ent, NULL);
1148}
1149
1150static int
1151qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1152 struct qed_ll2_info *p_ll2_info)
1153{
1154 struct qed_ll2_rx_packet *p_descq;
1155 u32 capacity;
1156 int rc = 0;
1157
1158 if (!p_ll2_info->input.rx_num_desc)
1159 goto out;
1160
1161 rc = qed_chain_alloc(p_hwfn->cdev,
1162 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1163 QED_CHAIN_MODE_NEXT_PTR,
1164 QED_CHAIN_CNT_TYPE_U16,
1165 p_ll2_info->input.rx_num_desc,
1166 sizeof(struct core_rx_bd),
1167 &p_ll2_info->rx_queue.rxq_chain, NULL);
1168 if (rc) {
1169 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1170 goto out;
1171 }
1172
1173 capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1174 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1175 GFP_KERNEL);
1176 if (!p_descq) {
1177 rc = -ENOMEM;
1178 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1179 goto out;
1180 }
1181 p_ll2_info->rx_queue.descq_array = p_descq;
1182
1183 rc = qed_chain_alloc(p_hwfn->cdev,
1184 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1185 QED_CHAIN_MODE_PBL,
1186 QED_CHAIN_CNT_TYPE_U16,
1187 p_ll2_info->input.rx_num_desc,
1188 sizeof(struct core_rx_fast_path_cqe),
1189 &p_ll2_info->rx_queue.rcq_chain, NULL);
1190 if (rc) {
1191 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1192 goto out;
1193 }
1194
1195 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1196 "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1197 p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1198
1199out:
1200 return rc;
1201}
1202
1203static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1204 struct qed_ll2_info *p_ll2_info)
1205{
1206 struct qed_ll2_tx_packet *p_descq;
1207 u32 desc_size;
1208 u32 capacity;
1209 int rc = 0;
1210
1211 if (!p_ll2_info->input.tx_num_desc)
1212 goto out;
1213
1214 rc = qed_chain_alloc(p_hwfn->cdev,
1215 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1216 QED_CHAIN_MODE_PBL,
1217 QED_CHAIN_CNT_TYPE_U16,
1218 p_ll2_info->input.tx_num_desc,
1219 sizeof(struct core_tx_bd),
1220 &p_ll2_info->tx_queue.txq_chain, NULL);
1221 if (rc)
1222 goto out;
1223
1224 capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1225
1226 desc_size = (sizeof(*p_descq) +
1227 (p_ll2_info->input.tx_max_bds_per_packet - 1) *
1228 sizeof(p_descq->bds_set));
1229
1230 p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1231 if (!p_descq) {
1232 rc = -ENOMEM;
1233 goto out;
1234 }
1235 p_ll2_info->tx_queue.descq_mem = p_descq;
1236
1237 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1238 "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1239 p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1240
1241out:
1242 if (rc)
1243 DP_NOTICE(p_hwfn,
1244 "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1245 p_ll2_info->input.tx_num_desc);
1246 return rc;
1247}
1248
1249static int
1250qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1251 struct qed_ll2_info *p_ll2_info, u16 mtu)
1252{
1253 struct qed_ooo_buffer *p_buf = NULL;
1254 void *p_virt;
1255 u16 buf_idx;
1256 int rc = 0;
1257
1258 if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1259 return rc;
1260
1261
1262 if (!p_ll2_info->input.rx_num_ooo_buffers) {
1263 u16 num_desc = p_ll2_info->input.rx_num_desc;
1264
1265 if (!num_desc)
1266 return -EINVAL;
1267 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1268 }
1269
1270 for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1271 buf_idx++) {
1272 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1273 if (!p_buf) {
1274 rc = -ENOMEM;
1275 goto out;
1276 }
1277
1278 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1279 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1280 ETH_CACHE_LINE_SIZE - 1) &
1281 ~(ETH_CACHE_LINE_SIZE - 1);
1282 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1283 p_buf->rx_buffer_size,
1284 &p_buf->rx_buffer_phys_addr,
1285 GFP_KERNEL);
1286 if (!p_virt) {
1287 kfree(p_buf);
1288 rc = -ENOMEM;
1289 goto out;
1290 }
1291
1292 p_buf->rx_buffer_virt_addr = p_virt;
1293 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1294 }
1295
1296 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1297 "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1298 p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1299
1300out:
1301 return rc;
1302}
1303
1304static int
1305qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1306{
1307 if (!cbs || (!cbs->rx_comp_cb ||
1308 !cbs->rx_release_cb ||
1309 !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1310 return -EINVAL;
1311
1312 p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1313 p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1314 p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1315 p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1316 p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1317 p_ll2_info->cbs.cookie = cbs->cookie;
1318
1319 return 0;
1320}
1321
1322static enum core_error_handle
1323qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1324{
1325 switch (err) {
1326 case QED_LL2_DROP_PACKET:
1327 return LL2_DROP_PACKET;
1328 case QED_LL2_DO_NOTHING:
1329 return LL2_DO_NOTHING;
1330 case QED_LL2_ASSERT:
1331 return LL2_ASSERT;
1332 default:
1333 return LL2_DO_NOTHING;
1334 }
1335}
1336
1337int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1338{
1339 struct qed_hwfn *p_hwfn = cxt;
1340 qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1341 struct qed_ll2_info *p_ll2_info = NULL;
1342 u8 i, *p_tx_max;
1343 int rc;
1344
1345 if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1346 return -EINVAL;
1347
1348
1349 for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
1350 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1351 if (p_hwfn->p_ll2_info[i].b_active) {
1352 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1353 continue;
1354 }
1355
1356 p_hwfn->p_ll2_info[i].b_active = true;
1357 p_ll2_info = &p_hwfn->p_ll2_info[i];
1358 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1359 break;
1360 }
1361 if (!p_ll2_info)
1362 return -EBUSY;
1363
1364 memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1365
1366 switch (data->input.tx_dest) {
1367 case QED_LL2_TX_DEST_NW:
1368 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1369 break;
1370 case QED_LL2_TX_DEST_LB:
1371 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1372 break;
1373 case QED_LL2_TX_DEST_DROP:
1374 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1375 break;
1376 default:
1377 return -EINVAL;
1378 }
1379
1380 if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1381 data->input.secondary_queue)
1382 p_ll2_info->main_func_queue = false;
1383 else
1384 p_ll2_info->main_func_queue = true;
1385
1386
1387 p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1388 if (*p_tx_max == 0)
1389 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1390 else
1391 *p_tx_max = min_t(u8, *p_tx_max,
1392 CORE_LL2_TX_MAX_BDS_PER_PACKET);
1393
1394 rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1395 if (rc) {
1396 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1397 goto q_allocate_fail;
1398 }
1399
1400 rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1401 if (rc)
1402 goto q_allocate_fail;
1403
1404 rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1405 if (rc)
1406 goto q_allocate_fail;
1407
1408 rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1409 data->input.mtu);
1410 if (rc)
1411 goto q_allocate_fail;
1412
1413
1414 if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1415 comp_rx_cb = qed_ll2_lb_rxq_completion;
1416 comp_tx_cb = qed_ll2_lb_txq_completion;
1417 } else {
1418 comp_rx_cb = qed_ll2_rxq_completion;
1419 comp_tx_cb = qed_ll2_txq_completion;
1420 }
1421
1422 if (data->input.rx_num_desc) {
1423 qed_int_register_cb(p_hwfn, comp_rx_cb,
1424 &p_hwfn->p_ll2_info[i],
1425 &p_ll2_info->rx_queue.rx_sb_index,
1426 &p_ll2_info->rx_queue.p_fw_cons);
1427 p_ll2_info->rx_queue.b_cb_registered = true;
1428 }
1429
1430 if (data->input.tx_num_desc) {
1431 qed_int_register_cb(p_hwfn,
1432 comp_tx_cb,
1433 &p_hwfn->p_ll2_info[i],
1434 &p_ll2_info->tx_queue.tx_sb_index,
1435 &p_ll2_info->tx_queue.p_fw_cons);
1436 p_ll2_info->tx_queue.b_cb_registered = true;
1437 }
1438
1439 *data->p_connection_handle = i;
1440 return rc;
1441
1442q_allocate_fail:
1443 qed_ll2_release_connection(p_hwfn, i);
1444 return -ENOMEM;
1445}
1446
1447static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1448 struct qed_ll2_info *p_ll2_conn)
1449{
1450 enum qed_ll2_error_handle error_input;
1451 enum core_error_handle error_mode;
1452 u8 action_on_error = 0;
1453
1454 if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1455 return 0;
1456
1457 DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1458 error_input = p_ll2_conn->input.ai_err_packet_too_big;
1459 error_mode = qed_ll2_get_error_choice(error_input);
1460 SET_FIELD(action_on_error,
1461 CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1462 error_input = p_ll2_conn->input.ai_err_no_buf;
1463 error_mode = qed_ll2_get_error_choice(error_input);
1464 SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1465
1466 return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1467}
1468
1469static void
1470qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1471 struct qed_ll2_info *p_ll2_conn)
1472{
1473 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1474 return;
1475
1476 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1477 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1478}
1479
1480int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1481{
1482 struct qed_hwfn *p_hwfn = cxt;
1483 struct qed_ll2_info *p_ll2_conn;
1484 struct qed_ll2_tx_packet *p_pkt;
1485 struct qed_ll2_rx_queue *p_rx;
1486 struct qed_ll2_tx_queue *p_tx;
1487 struct qed_ptt *p_ptt;
1488 int rc = -EINVAL;
1489 u32 i, capacity;
1490 u32 desc_size;
1491 u8 qid;
1492
1493 p_ptt = qed_ptt_acquire(p_hwfn);
1494 if (!p_ptt)
1495 return -EAGAIN;
1496
1497 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1498 if (!p_ll2_conn) {
1499 rc = -EINVAL;
1500 goto out;
1501 }
1502
1503 p_rx = &p_ll2_conn->rx_queue;
1504 p_tx = &p_ll2_conn->tx_queue;
1505
1506 qed_chain_reset(&p_rx->rxq_chain);
1507 qed_chain_reset(&p_rx->rcq_chain);
1508 INIT_LIST_HEAD(&p_rx->active_descq);
1509 INIT_LIST_HEAD(&p_rx->free_descq);
1510 INIT_LIST_HEAD(&p_rx->posting_descq);
1511 spin_lock_init(&p_rx->lock);
1512 capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1513 for (i = 0; i < capacity; i++)
1514 list_add_tail(&p_rx->descq_array[i].list_entry,
1515 &p_rx->free_descq);
1516 *p_rx->p_fw_cons = 0;
1517
1518 qed_chain_reset(&p_tx->txq_chain);
1519 INIT_LIST_HEAD(&p_tx->active_descq);
1520 INIT_LIST_HEAD(&p_tx->free_descq);
1521 INIT_LIST_HEAD(&p_tx->sending_descq);
1522 spin_lock_init(&p_tx->lock);
1523 capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1524
1525 desc_size = (sizeof(*p_pkt) +
1526 (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
1527 sizeof(p_pkt->bds_set));
1528
1529 for (i = 0; i < capacity; i++) {
1530 p_pkt = p_tx->descq_mem + desc_size * i;
1531 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1532 }
1533 p_tx->cur_completing_bd_idx = 0;
1534 p_tx->bds_idx = 0;
1535 p_tx->b_completing_packet = false;
1536 p_tx->cur_send_packet = NULL;
1537 p_tx->cur_send_frag_num = 0;
1538 p_tx->cur_completing_frag_num = 0;
1539 *p_tx->p_fw_cons = 0;
1540
1541 rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1542 if (rc)
1543 goto out;
1544
1545 qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
1546 p_ll2_conn->queue_id = qid;
1547 p_ll2_conn->tx_stats_id = qid;
1548 p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
1549 GTT_BAR0_MAP_REG_TSDM_RAM +
1550 TSTORM_LL2_RX_PRODS_OFFSET(qid);
1551 p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1552 qed_db_addr(p_ll2_conn->cid,
1553 DQ_DEMS_LEGACY);
1554
1555 SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1556 SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1557 SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1558 DQ_XCM_CORE_TX_BD_PROD_CMD);
1559 p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1560
1561
1562 rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1563 if (rc)
1564 goto out;
1565
1566 rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1567 if (rc)
1568 goto out;
1569
1570 if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1571 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1572
1573 qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1574
1575 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1576 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1577 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1578 ETH_P_FCOE, 0,
1579 QED_LLH_FILTER_ETHERTYPE);
1580 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1581 ETH_P_FIP, 0,
1582 QED_LLH_FILTER_ETHERTYPE);
1583 }
1584
1585out:
1586 qed_ptt_release(p_hwfn, p_ptt);
1587 return rc;
1588}
1589
1590static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1591 struct qed_ll2_rx_queue *p_rx,
1592 struct qed_ll2_rx_packet *p_curp)
1593{
1594 struct qed_ll2_rx_packet *p_posting_packet = NULL;
1595 struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
1596 bool b_notify_fw = false;
1597 u16 bd_prod, cq_prod;
1598
1599
1600 while (!list_empty(&p_rx->posting_descq)) {
1601 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1602 struct qed_ll2_rx_packet,
1603 list_entry);
1604 list_move_tail(&p_posting_packet->list_entry,
1605 &p_rx->active_descq);
1606 b_notify_fw = true;
1607 }
1608
1609
1610 if (p_curp) {
1611 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1612 b_notify_fw = true;
1613 }
1614
1615 if (!b_notify_fw)
1616 return;
1617
1618 bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1619 cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1620 rx_prod.bd_prod = cpu_to_le16(bd_prod);
1621 rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1622
1623
1624 dma_wmb();
1625
1626 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1627}
1628
1629int qed_ll2_post_rx_buffer(void *cxt,
1630 u8 connection_handle,
1631 dma_addr_t addr,
1632 u16 buf_len, void *cookie, u8 notify_fw)
1633{
1634 struct qed_hwfn *p_hwfn = cxt;
1635 struct core_rx_bd_with_buff_len *p_curb = NULL;
1636 struct qed_ll2_rx_packet *p_curp = NULL;
1637 struct qed_ll2_info *p_ll2_conn;
1638 struct qed_ll2_rx_queue *p_rx;
1639 unsigned long flags;
1640 void *p_data;
1641 int rc = 0;
1642
1643 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1644 if (!p_ll2_conn)
1645 return -EINVAL;
1646 p_rx = &p_ll2_conn->rx_queue;
1647
1648 spin_lock_irqsave(&p_rx->lock, flags);
1649 if (!list_empty(&p_rx->free_descq))
1650 p_curp = list_first_entry(&p_rx->free_descq,
1651 struct qed_ll2_rx_packet, list_entry);
1652 if (p_curp) {
1653 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1654 qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1655 p_data = qed_chain_produce(&p_rx->rxq_chain);
1656 p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1657 qed_chain_produce(&p_rx->rcq_chain);
1658 }
1659 }
1660
1661
1662 if (!p_curp || !p_curb) {
1663 rc = -EBUSY;
1664 p_curp = NULL;
1665 goto out_notify;
1666 }
1667
1668
1669 DMA_REGPAIR_LE(p_curb->addr, addr);
1670 p_curb->buff_length = cpu_to_le16(buf_len);
1671 p_curp->rx_buf_addr = addr;
1672 p_curp->cookie = cookie;
1673 p_curp->rxq_bd = p_curb;
1674 p_curp->buf_length = buf_len;
1675 list_del(&p_curp->list_entry);
1676
1677
1678 if (!notify_fw) {
1679 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1680 goto out;
1681 }
1682
1683out_notify:
1684 qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1685out:
1686 spin_unlock_irqrestore(&p_rx->lock, flags);
1687 return rc;
1688}
1689
1690static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1691 struct qed_ll2_tx_queue *p_tx,
1692 struct qed_ll2_tx_packet *p_curp,
1693 struct qed_ll2_tx_pkt_info *pkt,
1694 u8 notify_fw)
1695{
1696 list_del(&p_curp->list_entry);
1697 p_curp->cookie = pkt->cookie;
1698 p_curp->bd_used = pkt->num_of_bds;
1699 p_curp->notify_fw = notify_fw;
1700 p_tx->cur_send_packet = p_curp;
1701 p_tx->cur_send_frag_num = 0;
1702
1703 p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1704 p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1705 p_tx->cur_send_frag_num++;
1706}
1707
1708static void
1709qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1710 struct qed_ll2_info *p_ll2,
1711 struct qed_ll2_tx_packet *p_curp,
1712 struct qed_ll2_tx_pkt_info *pkt)
1713{
1714 struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1715 u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1716 struct core_tx_bd *start_bd = NULL;
1717 enum core_roce_flavor_type roce_flavor;
1718 enum core_tx_dest tx_dest;
1719 u16 bd_data = 0, frag_idx;
1720
1721 roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1722 : CORE_RROCE;
1723
1724 switch (pkt->tx_dest) {
1725 case QED_LL2_TX_DEST_NW:
1726 tx_dest = CORE_TX_DEST_NW;
1727 break;
1728 case QED_LL2_TX_DEST_LB:
1729 tx_dest = CORE_TX_DEST_LB;
1730 break;
1731 case QED_LL2_TX_DEST_DROP:
1732 tx_dest = CORE_TX_DEST_DROP;
1733 break;
1734 default:
1735 tx_dest = CORE_TX_DEST_LB;
1736 break;
1737 }
1738
1739 start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1740 if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1741 p_ll2->input.conn_type == QED_LL2_TYPE_OOO) {
1742 start_bd->nw_vlan_or_lb_echo =
1743 cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1744 } else {
1745 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1746 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1747 p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1748 pkt->remove_stag = true;
1749 }
1750
1751 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1752 cpu_to_le16(pkt->l4_hdr_offset_w));
1753 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1754 bd_data |= pkt->bd_flags;
1755 SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1756 SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1757 SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1758 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1759 SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1760 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1761 SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1762 !!(pkt->remove_stag));
1763
1764 start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1765 DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1766 start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1767
1768 DP_VERBOSE(p_hwfn,
1769 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1770 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n",
1771 p_ll2->queue_id,
1772 p_ll2->cid,
1773 p_ll2->input.conn_type,
1774 prod_idx,
1775 pkt->first_frag_len,
1776 pkt->num_of_bds,
1777 le32_to_cpu(start_bd->addr.hi),
1778 le32_to_cpu(start_bd->addr.lo));
1779
1780 if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1781 return;
1782
1783
1784 for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1785 frag_idx < pkt->num_of_bds; frag_idx++) {
1786 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1787
1788 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1789 (*p_bd)->bd_data.as_bitfield = 0;
1790 (*p_bd)->bitfield1 = 0;
1791 p_curp->bds_set[frag_idx].tx_frag = 0;
1792 p_curp->bds_set[frag_idx].frag_len = 0;
1793 }
1794}
1795
1796
1797static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1798 struct qed_ll2_info *p_ll2_conn)
1799{
1800 bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1801 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1802 struct qed_ll2_tx_packet *p_pkt = NULL;
1803 u16 bd_prod;
1804
1805
1806 if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1807 p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1808 return;
1809
1810
1811 list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1812 &p_ll2_conn->tx_queue.sending_descq);
1813 p_ll2_conn->tx_queue.cur_send_packet = NULL;
1814 p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1815
1816
1817 if (!b_notify)
1818 return;
1819
1820 bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1821
1822 while (!list_empty(&p_tx->sending_descq)) {
1823 p_pkt = list_first_entry(&p_tx->sending_descq,
1824 struct qed_ll2_tx_packet, list_entry);
1825 if (!p_pkt)
1826 break;
1827
1828 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1829 }
1830
1831 p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1832
1833
1834 wmb();
1835
1836 DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1837
1838 DP_VERBOSE(p_hwfn,
1839 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1840 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1841 p_ll2_conn->queue_id,
1842 p_ll2_conn->cid,
1843 p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1844}
1845
1846int qed_ll2_prepare_tx_packet(void *cxt,
1847 u8 connection_handle,
1848 struct qed_ll2_tx_pkt_info *pkt,
1849 bool notify_fw)
1850{
1851 struct qed_hwfn *p_hwfn = cxt;
1852 struct qed_ll2_tx_packet *p_curp = NULL;
1853 struct qed_ll2_info *p_ll2_conn = NULL;
1854 struct qed_ll2_tx_queue *p_tx;
1855 struct qed_chain *p_tx_chain;
1856 unsigned long flags;
1857 int rc = 0;
1858
1859 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1860 if (!p_ll2_conn)
1861 return -EINVAL;
1862 p_tx = &p_ll2_conn->tx_queue;
1863 p_tx_chain = &p_tx->txq_chain;
1864
1865 if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1866 return -EIO;
1867
1868 spin_lock_irqsave(&p_tx->lock, flags);
1869 if (p_tx->cur_send_packet) {
1870 rc = -EEXIST;
1871 goto out;
1872 }
1873
1874
1875 if (!list_empty(&p_tx->free_descq))
1876 p_curp = list_first_entry(&p_tx->free_descq,
1877 struct qed_ll2_tx_packet, list_entry);
1878 if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1879 p_curp = NULL;
1880
1881 if (!p_curp) {
1882 rc = -EBUSY;
1883 goto out;
1884 }
1885
1886
1887 qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1888
1889 qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1890
1891 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1892
1893out:
1894 spin_unlock_irqrestore(&p_tx->lock, flags);
1895 return rc;
1896}
1897
1898int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1899 u8 connection_handle,
1900 dma_addr_t addr, u16 nbytes)
1901{
1902 struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1903 struct qed_hwfn *p_hwfn = cxt;
1904 struct qed_ll2_info *p_ll2_conn = NULL;
1905 u16 cur_send_frag_num = 0;
1906 struct core_tx_bd *p_bd;
1907 unsigned long flags;
1908
1909 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1910 if (!p_ll2_conn)
1911 return -EINVAL;
1912
1913 if (!p_ll2_conn->tx_queue.cur_send_packet)
1914 return -EINVAL;
1915
1916 p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1917 cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1918
1919 if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1920 return -EINVAL;
1921
1922
1923 p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1924 DMA_REGPAIR_LE(p_bd->addr, addr);
1925 p_bd->nbytes = cpu_to_le16(nbytes);
1926 p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1927 p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1928
1929 p_ll2_conn->tx_queue.cur_send_frag_num++;
1930
1931 spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1932 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1933 spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1934
1935 return 0;
1936}
1937
1938int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
1939{
1940 struct qed_hwfn *p_hwfn = cxt;
1941 struct qed_ll2_info *p_ll2_conn = NULL;
1942 int rc = -EINVAL;
1943 struct qed_ptt *p_ptt;
1944
1945 p_ptt = qed_ptt_acquire(p_hwfn);
1946 if (!p_ptt)
1947 return -EAGAIN;
1948
1949 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1950 if (!p_ll2_conn) {
1951 rc = -EINVAL;
1952 goto out;
1953 }
1954
1955
1956 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1957 p_ll2_conn->tx_queue.b_cb_registered = false;
1958 smp_wmb();
1959 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1960 if (rc)
1961 goto out;
1962
1963 qed_ll2_txq_flush(p_hwfn, connection_handle);
1964 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1965 }
1966
1967 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1968 p_ll2_conn->rx_queue.b_cb_registered = false;
1969 smp_wmb();
1970 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1971 if (rc)
1972 goto out;
1973
1974 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1975 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1976 }
1977
1978 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1979 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1980
1981 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1982 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1983 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1984 ETH_P_FCOE, 0,
1985 QED_LLH_FILTER_ETHERTYPE);
1986 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1987 ETH_P_FIP, 0,
1988 QED_LLH_FILTER_ETHERTYPE);
1989 }
1990
1991out:
1992 qed_ptt_release(p_hwfn, p_ptt);
1993 return rc;
1994}
1995
1996static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
1997 struct qed_ll2_info *p_ll2_conn)
1998{
1999 struct qed_ooo_buffer *p_buffer;
2000
2001 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2002 return;
2003
2004 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2005 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2006 p_hwfn->p_ooo_info))) {
2007 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2008 p_buffer->rx_buffer_size,
2009 p_buffer->rx_buffer_virt_addr,
2010 p_buffer->rx_buffer_phys_addr);
2011 kfree(p_buffer);
2012 }
2013}
2014
2015void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2016{
2017 struct qed_hwfn *p_hwfn = cxt;
2018 struct qed_ll2_info *p_ll2_conn = NULL;
2019
2020 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2021 if (!p_ll2_conn)
2022 return;
2023
2024 kfree(p_ll2_conn->tx_queue.descq_mem);
2025 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2026
2027 kfree(p_ll2_conn->rx_queue.descq_array);
2028 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2029 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2030
2031 qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2032
2033 qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2034
2035 mutex_lock(&p_ll2_conn->mutex);
2036 p_ll2_conn->b_active = false;
2037 mutex_unlock(&p_ll2_conn->mutex);
2038}
2039
2040int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2041{
2042 struct qed_ll2_info *p_ll2_connections;
2043 u8 i;
2044
2045
2046 p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2047 sizeof(struct qed_ll2_info), GFP_KERNEL);
2048 if (!p_ll2_connections) {
2049 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2050 return -ENOMEM;
2051 }
2052
2053 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2054 p_ll2_connections[i].my_id = i;
2055
2056 p_hwfn->p_ll2_info = p_ll2_connections;
2057 return 0;
2058}
2059
2060void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2061{
2062 int i;
2063
2064 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2065 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2066}
2067
2068void qed_ll2_free(struct qed_hwfn *p_hwfn)
2069{
2070 if (!p_hwfn->p_ll2_info)
2071 return;
2072
2073 kfree(p_hwfn->p_ll2_info);
2074 p_hwfn->p_ll2_info = NULL;
2075}
2076
2077static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2078 struct qed_ptt *p_ptt,
2079 struct qed_ll2_stats *p_stats)
2080{
2081 struct core_ll2_port_stats port_stats;
2082
2083 memset(&port_stats, 0, sizeof(port_stats));
2084 qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2085 BAR0_MAP_REG_TSDM_RAM +
2086 TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2087 sizeof(port_stats));
2088
2089 p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2090 p_stats->gsi_invalid_pkt_length =
2091 HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2092 p_stats->gsi_unsupported_pkt_typ =
2093 HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2094 p_stats->gsi_crcchksm_error =
2095 HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2096}
2097
2098static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2099 struct qed_ptt *p_ptt,
2100 struct qed_ll2_info *p_ll2_conn,
2101 struct qed_ll2_stats *p_stats)
2102{
2103 struct core_ll2_tstorm_per_queue_stat tstats;
2104 u8 qid = p_ll2_conn->queue_id;
2105 u32 tstats_addr;
2106
2107 memset(&tstats, 0, sizeof(tstats));
2108 tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2109 CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2110 qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2111
2112 p_stats->packet_too_big_discard =
2113 HILO_64_REGPAIR(tstats.packet_too_big_discard);
2114 p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
2115}
2116
2117static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2118 struct qed_ptt *p_ptt,
2119 struct qed_ll2_info *p_ll2_conn,
2120 struct qed_ll2_stats *p_stats)
2121{
2122 struct core_ll2_ustorm_per_queue_stat ustats;
2123 u8 qid = p_ll2_conn->queue_id;
2124 u32 ustats_addr;
2125
2126 memset(&ustats, 0, sizeof(ustats));
2127 ustats_addr = BAR0_MAP_REG_USDM_RAM +
2128 CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2129 qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2130
2131 p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2132 p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2133 p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2134 p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2135 p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2136 p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2137}
2138
2139static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2140 struct qed_ptt *p_ptt,
2141 struct qed_ll2_info *p_ll2_conn,
2142 struct qed_ll2_stats *p_stats)
2143{
2144 struct core_ll2_pstorm_per_queue_stat pstats;
2145 u8 stats_id = p_ll2_conn->tx_stats_id;
2146 u32 pstats_addr;
2147
2148 memset(&pstats, 0, sizeof(pstats));
2149 pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2150 CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2151 qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2152
2153 p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2154 p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2155 p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2156 p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2157 p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2158 p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2159}
2160
2161int qed_ll2_get_stats(void *cxt,
2162 u8 connection_handle, struct qed_ll2_stats *p_stats)
2163{
2164 struct qed_hwfn *p_hwfn = cxt;
2165 struct qed_ll2_info *p_ll2_conn = NULL;
2166 struct qed_ptt *p_ptt;
2167
2168 memset(p_stats, 0, sizeof(*p_stats));
2169
2170 if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2171 !p_hwfn->p_ll2_info)
2172 return -EINVAL;
2173
2174 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2175
2176 p_ptt = qed_ptt_acquire(p_hwfn);
2177 if (!p_ptt) {
2178 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2179 return -EINVAL;
2180 }
2181
2182 if (p_ll2_conn->input.gsi_enable)
2183 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2184 _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2185 _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2186 if (p_ll2_conn->tx_stats_en)
2187 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2188
2189 qed_ptt_release(p_hwfn, p_ptt);
2190 return 0;
2191}
2192
2193static void qed_ll2b_release_rx_packet(void *cxt,
2194 u8 connection_handle,
2195 void *cookie,
2196 dma_addr_t rx_buf_addr,
2197 bool b_last_packet)
2198{
2199 struct qed_hwfn *p_hwfn = cxt;
2200
2201 qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2202}
2203
2204static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2205 const struct qed_ll2_cb_ops *ops,
2206 void *cookie)
2207{
2208 cdev->ll2->cbs = ops;
2209 cdev->ll2->cb_cookie = cookie;
2210}
2211
2212struct qed_ll2_cbs ll2_cbs = {
2213 .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2214 .rx_release_cb = &qed_ll2b_release_rx_packet,
2215 .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2216 .tx_release_cb = &qed_ll2b_complete_tx_packet,
2217};
2218
2219static void qed_ll2_set_conn_data(struct qed_dev *cdev,
2220 struct qed_ll2_acquire_data *data,
2221 struct qed_ll2_params *params,
2222 enum qed_ll2_conn_type conn_type,
2223 u8 *handle, bool lb)
2224{
2225 memset(data, 0, sizeof(*data));
2226
2227 data->input.conn_type = conn_type;
2228 data->input.mtu = params->mtu;
2229 data->input.rx_num_desc = QED_LL2_RX_SIZE;
2230 data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2231 data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2232 data->input.tx_num_desc = QED_LL2_TX_SIZE;
2233 data->p_connection_handle = handle;
2234 data->cbs = &ll2_cbs;
2235 ll2_cbs.cookie = QED_LEADING_HWFN(cdev);
2236
2237 if (lb) {
2238 data->input.tx_tc = PKT_LB_TC;
2239 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2240 } else {
2241 data->input.tx_tc = 0;
2242 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2243 }
2244}
2245
2246static int qed_ll2_start_ooo(struct qed_dev *cdev,
2247 struct qed_ll2_params *params)
2248{
2249 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
2250 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2251 struct qed_ll2_acquire_data data;
2252 int rc;
2253
2254 qed_ll2_set_conn_data(cdev, &data, params,
2255 QED_LL2_TYPE_OOO, handle, true);
2256
2257 rc = qed_ll2_acquire_connection(hwfn, &data);
2258 if (rc) {
2259 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n");
2260 goto out;
2261 }
2262
2263 rc = qed_ll2_establish_connection(hwfn, *handle);
2264 if (rc) {
2265 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n");
2266 goto fail;
2267 }
2268
2269 return 0;
2270
2271fail:
2272 qed_ll2_release_connection(hwfn, *handle);
2273out:
2274 *handle = QED_LL2_UNUSED_HANDLE;
2275 return rc;
2276}
2277
2278static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2279{
2280 struct qed_ll2_buffer *buffer, *tmp_buffer;
2281 enum qed_ll2_conn_type conn_type;
2282 struct qed_ll2_acquire_data data;
2283 struct qed_ptt *p_ptt;
2284 int rc, i;
2285
2286
2287
2288 INIT_LIST_HEAD(&cdev->ll2->list);
2289 spin_lock_init(&cdev->ll2->lock);
2290 cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2291 L1_CACHE_BYTES + params->mtu;
2292
2293
2294 DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
2295 cdev->ll2->rx_size);
2296 for (i = 0; i < QED_LL2_RX_SIZE; i++) {
2297 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2298 if (!buffer) {
2299 DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2300 goto fail;
2301 }
2302
2303 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2304 &buffer->phys_addr);
2305 if (rc) {
2306 kfree(buffer);
2307 goto fail;
2308 }
2309
2310 list_add_tail(&buffer->list, &cdev->ll2->list);
2311 }
2312
2313 switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
2314 case QED_PCI_FCOE:
2315 conn_type = QED_LL2_TYPE_FCOE;
2316 break;
2317 case QED_PCI_ISCSI:
2318 conn_type = QED_LL2_TYPE_ISCSI;
2319 break;
2320 case QED_PCI_ETH_ROCE:
2321 conn_type = QED_LL2_TYPE_ROCE;
2322 break;
2323 default:
2324 conn_type = QED_LL2_TYPE_TEST;
2325 }
2326
2327 qed_ll2_set_conn_data(cdev, &data, params, conn_type,
2328 &cdev->ll2->handle, false);
2329
2330 rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data);
2331 if (rc) {
2332 DP_INFO(cdev, "Failed to acquire LL2 connection\n");
2333 goto fail;
2334 }
2335
2336 rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
2337 cdev->ll2->handle);
2338 if (rc) {
2339 DP_INFO(cdev, "Failed to establish LL2 connection\n");
2340 goto release_fail;
2341 }
2342
2343
2344 spin_lock_bh(&cdev->ll2->lock);
2345 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2346 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
2347 cdev->ll2->handle,
2348 buffer->phys_addr, 0, buffer, 1);
2349 if (rc) {
2350 DP_INFO(cdev,
2351 "Failed to post an Rx buffer; Deleting it\n");
2352 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2353 cdev->ll2->rx_size, DMA_FROM_DEVICE);
2354 kfree(buffer->data);
2355 list_del(&buffer->list);
2356 kfree(buffer);
2357 } else {
2358 cdev->ll2->rx_cnt++;
2359 }
2360 }
2361 spin_unlock_bh(&cdev->ll2->lock);
2362
2363 if (!cdev->ll2->rx_cnt) {
2364 DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
2365 goto release_terminate;
2366 }
2367
2368 if (!is_valid_ether_addr(params->ll2_mac_address)) {
2369 DP_INFO(cdev, "Invalid Ethernet address\n");
2370 goto release_terminate;
2371 }
2372
2373 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) {
2374 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2375 rc = qed_ll2_start_ooo(cdev, params);
2376 if (rc) {
2377 DP_INFO(cdev,
2378 "Failed to initialize the OOO LL2 queue\n");
2379 goto release_terminate;
2380 }
2381 }
2382
2383 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2384 if (!p_ptt) {
2385 DP_INFO(cdev, "Failed to acquire PTT\n");
2386 goto release_terminate;
2387 }
2388
2389 rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2390 params->ll2_mac_address);
2391 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2392 if (rc) {
2393 DP_ERR(cdev, "Failed to allocate LLH filter\n");
2394 goto release_terminate_all;
2395 }
2396
2397 ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2398 return 0;
2399
2400release_terminate_all:
2401
2402release_terminate:
2403 qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2404release_fail:
2405 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2406fail:
2407 qed_ll2_kill_buffers(cdev);
2408 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2409 return -EINVAL;
2410}
2411
2412static int qed_ll2_stop(struct qed_dev *cdev)
2413{
2414 struct qed_ptt *p_ptt;
2415 int rc;
2416
2417 if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2418 return 0;
2419
2420 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2421 if (!p_ptt) {
2422 DP_INFO(cdev, "Failed to acquire PTT\n");
2423 goto fail;
2424 }
2425
2426 qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2427 cdev->ll2_mac_address);
2428 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2429 eth_zero_addr(cdev->ll2_mac_address);
2430
2431 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI)
2432 qed_ll2_stop_ooo(cdev);
2433
2434 rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
2435 cdev->ll2->handle);
2436 if (rc)
2437 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2438
2439 qed_ll2_kill_buffers(cdev);
2440
2441 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2442 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2443
2444 return rc;
2445fail:
2446 return -EINVAL;
2447}
2448
2449static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2450 unsigned long xmit_flags)
2451{
2452 struct qed_ll2_tx_pkt_info pkt;
2453 const skb_frag_t *frag;
2454 u8 flags = 0, nr_frags;
2455 int rc = -EINVAL, i;
2456 dma_addr_t mapping;
2457 u16 vlan = 0;
2458
2459 if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2460 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2461 return -EINVAL;
2462 }
2463
2464
2465
2466
2467 nr_frags = skb_shinfo(skb)->nr_frags;
2468
2469 if (1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2470 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2471 1 + nr_frags);
2472 return -EINVAL;
2473 }
2474
2475 mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2476 skb->len, DMA_TO_DEVICE);
2477 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2478 DP_NOTICE(cdev, "SKB mapping failed\n");
2479 return -EINVAL;
2480 }
2481
2482
2483 if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2484 ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2485 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2486
2487 if (skb_vlan_tag_present(skb)) {
2488 vlan = skb_vlan_tag_get(skb);
2489 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2490 }
2491
2492 memset(&pkt, 0, sizeof(pkt));
2493 pkt.num_of_bds = 1 + nr_frags;
2494 pkt.vlan = vlan;
2495 pkt.bd_flags = flags;
2496 pkt.tx_dest = QED_LL2_TX_DEST_NW;
2497 pkt.first_frag = mapping;
2498 pkt.first_frag_len = skb->len;
2499 pkt.cookie = skb;
2500 if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2501 test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2502 pkt.remove_stag = true;
2503
2504
2505
2506
2507
2508
2509 rc = qed_ll2_prepare_tx_packet(&cdev->hwfns[0], cdev->ll2->handle,
2510 &pkt, 1);
2511 if (rc)
2512 goto err;
2513
2514 for (i = 0; i < nr_frags; i++) {
2515 frag = &skb_shinfo(skb)->frags[i];
2516
2517 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2518 skb_frag_size(frag), DMA_TO_DEVICE);
2519
2520 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2521 DP_NOTICE(cdev,
2522 "Unable to map frag - dropping packet\n");
2523 rc = -ENOMEM;
2524 goto err;
2525 }
2526
2527 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
2528 cdev->ll2->handle,
2529 mapping,
2530 skb_frag_size(frag));
2531
2532
2533
2534
2535 if (rc)
2536 goto err2;
2537 }
2538
2539 return 0;
2540
2541err:
2542 dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2543
2544err2:
2545 return rc;
2546}
2547
2548static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2549{
2550 if (!cdev->ll2)
2551 return -EINVAL;
2552
2553 return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2554 cdev->ll2->handle, stats);
2555}
2556
2557const struct qed_ll2_ops qed_ll2_ops_pass = {
2558 .start = &qed_ll2_start,
2559 .stop = &qed_ll2_stop,
2560 .start_xmit = &qed_ll2_start_xmit,
2561 .register_cb_ops = &qed_ll2_register_cb_ops,
2562 .get_stats = &qed_ll2_stats,
2563};
2564
2565int qed_ll2_alloc_if(struct qed_dev *cdev)
2566{
2567 cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2568 return cdev->ll2 ? 0 : -ENOMEM;
2569}
2570
2571void qed_ll2_dealloc_if(struct qed_dev *cdev)
2572{
2573 kfree(cdev->ll2);
2574 cdev->ll2 = NULL;
2575}
2576
