2 * drivers/net/ethernet/mellanox/mlxsw/pci.c
3 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the names of the copyright holders nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
18 * Alternatively, this software may be distributed under the terms of the
19 * GNU General Public License ("GPL") version 2 as published by the Free
20 * Software Foundation.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/export.h>
38 #include <linux/err.h>
39 #include <linux/device.h>
40 #include <linux/pci.h>
41 #include <linux/interrupt.h>
42 #include <linux/wait.h>
43 #include <linux/types.h>
44 #include <linux/skbuff.h>
45 #include <linux/if_vlan.h>
46 #include <linux/log2.h>
47 #include <linux/debugfs.h>
48 #include <linux/seq_file.h>
49 #include <linux/string.h>
56 static const char mlxsw_pci_driver_name[] = "mlxsw_pci";
58 static const struct pci_device_id mlxsw_pci_id_table[] = {
59 {PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_SWITCHX2), 0},
63 static struct dentry *mlxsw_pci_dbg_root;
65 static const char *mlxsw_pci_device_kind_get(const struct pci_device_id *id)
68 case PCI_DEVICE_ID_MELLANOX_SWITCHX2:
69 return MLXSW_DEVICE_KIND_SWITCHX2;
75 #define mlxsw_pci_write32(mlxsw_pci, reg, val) \
76 iowrite32be(val, (mlxsw_pci)->hw_addr + (MLXSW_PCI_ ## reg))
77 #define mlxsw_pci_read32(mlxsw_pci, reg) \
78 ioread32be((mlxsw_pci)->hw_addr + (MLXSW_PCI_ ## reg))
80 enum mlxsw_pci_queue_type {
81 MLXSW_PCI_QUEUE_TYPE_SDQ,
82 MLXSW_PCI_QUEUE_TYPE_RDQ,
83 MLXSW_PCI_QUEUE_TYPE_CQ,
84 MLXSW_PCI_QUEUE_TYPE_EQ,
87 static const char *mlxsw_pci_queue_type_str(enum mlxsw_pci_queue_type q_type)
90 case MLXSW_PCI_QUEUE_TYPE_SDQ:
92 case MLXSW_PCI_QUEUE_TYPE_RDQ:
94 case MLXSW_PCI_QUEUE_TYPE_CQ:
96 case MLXSW_PCI_QUEUE_TYPE_EQ:
102 #define MLXSW_PCI_QUEUE_TYPE_COUNT 4
104 static const u16 mlxsw_pci_doorbell_type_offset[] = {
105 MLXSW_PCI_DOORBELL_SDQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_SDQ */
106 MLXSW_PCI_DOORBELL_RDQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_RDQ */
107 MLXSW_PCI_DOORBELL_CQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_CQ */
108 MLXSW_PCI_DOORBELL_EQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_EQ */
111 static const u16 mlxsw_pci_doorbell_arm_type_offset[] = {
114 MLXSW_PCI_DOORBELL_ARM_CQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_CQ */
115 MLXSW_PCI_DOORBELL_ARM_EQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_EQ */
118 struct mlxsw_pci_mem_item {
124 struct mlxsw_pci_queue_elem_info {
125 char *elem; /* pointer to actual dma mapped element mem chunk */
136 struct mlxsw_pci_queue {
137 spinlock_t lock; /* for queue accesses */
138 struct mlxsw_pci_mem_item mem_item;
139 struct mlxsw_pci_queue_elem_info *elem_info;
140 u16 producer_counter;
141 u16 consumer_counter;
142 u16 count; /* number of elements in queue */
143 u8 num; /* queue number */
144 u8 elem_size; /* size of one element */
145 enum mlxsw_pci_queue_type type;
146 struct tasklet_struct tasklet; /* queue processing tasklet */
147 struct mlxsw_pci *pci;
161 struct mlxsw_pci_queue_type_group {
162 struct mlxsw_pci_queue *q;
163 u8 count; /* number of queues in group */
167 struct pci_dev *pdev;
169 struct mlxsw_pci_queue_type_group queues[MLXSW_PCI_QUEUE_TYPE_COUNT];
171 struct msix_entry msix_entry;
172 struct mlxsw_core *core;
175 struct mlxsw_pci_mem_item *items;
178 struct mlxsw_pci_mem_item out_mbox;
179 struct mlxsw_pci_mem_item in_mbox;
180 struct mutex lock; /* Lock access to command registers */
182 wait_queue_head_t wait;
189 struct mlxsw_bus_info bus_info;
190 struct dentry *dbg_dir;
193 static void mlxsw_pci_queue_tasklet_schedule(struct mlxsw_pci_queue *q)
195 tasklet_schedule(&q->tasklet);
198 static char *__mlxsw_pci_queue_elem_get(struct mlxsw_pci_queue *q,
199 size_t elem_size, int elem_index)
201 return q->mem_item.buf + (elem_size * elem_index);
204 static struct mlxsw_pci_queue_elem_info *
205 mlxsw_pci_queue_elem_info_get(struct mlxsw_pci_queue *q, int elem_index)
207 return &q->elem_info[elem_index];
210 static struct mlxsw_pci_queue_elem_info *
211 mlxsw_pci_queue_elem_info_producer_get(struct mlxsw_pci_queue *q)
213 int index = q->producer_counter & (q->count - 1);
215 if ((q->producer_counter - q->consumer_counter) == q->count)
217 return mlxsw_pci_queue_elem_info_get(q, index);
220 static struct mlxsw_pci_queue_elem_info *
221 mlxsw_pci_queue_elem_info_consumer_get(struct mlxsw_pci_queue *q)
223 int index = q->consumer_counter & (q->count - 1);
225 return mlxsw_pci_queue_elem_info_get(q, index);
228 static char *mlxsw_pci_queue_elem_get(struct mlxsw_pci_queue *q, int elem_index)
230 return mlxsw_pci_queue_elem_info_get(q, elem_index)->elem;
233 static bool mlxsw_pci_elem_hw_owned(struct mlxsw_pci_queue *q, bool owner_bit)
235 return owner_bit != !!(q->consumer_counter & q->count);
238 static char *mlxsw_pci_queue_sw_elem_get(struct mlxsw_pci_queue *q,
239 u32 (*get_elem_owner_func)(char *))
241 struct mlxsw_pci_queue_elem_info *elem_info;
245 elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
246 elem = elem_info->elem;
247 owner_bit = get_elem_owner_func(elem);
248 if (mlxsw_pci_elem_hw_owned(q, owner_bit))
250 q->consumer_counter++;
251 rmb(); /* make sure we read owned bit before the rest of elem */
255 static struct mlxsw_pci_queue_type_group *
256 mlxsw_pci_queue_type_group_get(struct mlxsw_pci *mlxsw_pci,
257 enum mlxsw_pci_queue_type q_type)
259 return &mlxsw_pci->queues[q_type];
262 static u8 __mlxsw_pci_queue_count(struct mlxsw_pci *mlxsw_pci,
263 enum mlxsw_pci_queue_type q_type)
265 struct mlxsw_pci_queue_type_group *queue_group;
267 queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_type);
268 return queue_group->count;
271 static u8 mlxsw_pci_sdq_count(struct mlxsw_pci *mlxsw_pci)
273 return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_SDQ);
276 static u8 mlxsw_pci_rdq_count(struct mlxsw_pci *mlxsw_pci)
278 return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_RDQ);
281 static u8 mlxsw_pci_cq_count(struct mlxsw_pci *mlxsw_pci)
283 return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_CQ);
286 static u8 mlxsw_pci_eq_count(struct mlxsw_pci *mlxsw_pci)
288 return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_EQ);
291 static struct mlxsw_pci_queue *
292 __mlxsw_pci_queue_get(struct mlxsw_pci *mlxsw_pci,
293 enum mlxsw_pci_queue_type q_type, u8 q_num)
295 return &mlxsw_pci->queues[q_type].q[q_num];
298 static struct mlxsw_pci_queue *mlxsw_pci_sdq_get(struct mlxsw_pci *mlxsw_pci,
301 return __mlxsw_pci_queue_get(mlxsw_pci,
302 MLXSW_PCI_QUEUE_TYPE_SDQ, q_num);
305 static struct mlxsw_pci_queue *mlxsw_pci_rdq_get(struct mlxsw_pci *mlxsw_pci,
308 return __mlxsw_pci_queue_get(mlxsw_pci,
309 MLXSW_PCI_QUEUE_TYPE_RDQ, q_num);
312 static struct mlxsw_pci_queue *mlxsw_pci_cq_get(struct mlxsw_pci *mlxsw_pci,
315 return __mlxsw_pci_queue_get(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_CQ, q_num);
318 static struct mlxsw_pci_queue *mlxsw_pci_eq_get(struct mlxsw_pci *mlxsw_pci,
321 return __mlxsw_pci_queue_get(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_EQ, q_num);
324 static void __mlxsw_pci_queue_doorbell_set(struct mlxsw_pci *mlxsw_pci,
325 struct mlxsw_pci_queue *q,
328 mlxsw_pci_write32(mlxsw_pci,
329 DOORBELL(mlxsw_pci->doorbell_offset,
330 mlxsw_pci_doorbell_type_offset[q->type],
334 static void __mlxsw_pci_queue_doorbell_arm_set(struct mlxsw_pci *mlxsw_pci,
335 struct mlxsw_pci_queue *q,
338 mlxsw_pci_write32(mlxsw_pci,
339 DOORBELL(mlxsw_pci->doorbell_offset,
340 mlxsw_pci_doorbell_arm_type_offset[q->type],
344 static void mlxsw_pci_queue_doorbell_producer_ring(struct mlxsw_pci *mlxsw_pci,
345 struct mlxsw_pci_queue *q)
347 wmb(); /* ensure all writes are done before we ring a bell */
348 __mlxsw_pci_queue_doorbell_set(mlxsw_pci, q, q->producer_counter);
351 static void mlxsw_pci_queue_doorbell_consumer_ring(struct mlxsw_pci *mlxsw_pci,
352 struct mlxsw_pci_queue *q)
354 wmb(); /* ensure all writes are done before we ring a bell */
355 __mlxsw_pci_queue_doorbell_set(mlxsw_pci, q,
356 q->consumer_counter + q->count);
360 mlxsw_pci_queue_doorbell_arm_consumer_ring(struct mlxsw_pci *mlxsw_pci,
361 struct mlxsw_pci_queue *q)
363 wmb(); /* ensure all writes are done before we ring a bell */
364 __mlxsw_pci_queue_doorbell_arm_set(mlxsw_pci, q, q->consumer_counter);
367 static dma_addr_t __mlxsw_pci_queue_page_get(struct mlxsw_pci_queue *q,
370 return q->mem_item.mapaddr + MLXSW_PCI_PAGE_SIZE * page_index;
373 static int mlxsw_pci_sdq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
374 struct mlxsw_pci_queue *q)
379 q->producer_counter = 0;
380 q->consumer_counter = 0;
382 /* Set CQ of same number of this SDQ. */
383 mlxsw_cmd_mbox_sw2hw_dq_cq_set(mbox, q->num);
384 mlxsw_cmd_mbox_sw2hw_dq_sdq_tclass_set(mbox, 7);
385 mlxsw_cmd_mbox_sw2hw_dq_log2_dq_sz_set(mbox, 3); /* 8 pages */
386 for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
387 dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
389 mlxsw_cmd_mbox_sw2hw_dq_pa_set(mbox, i, mapaddr);
392 err = mlxsw_cmd_sw2hw_sdq(mlxsw_pci->core, mbox, q->num);
395 mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
399 static void mlxsw_pci_sdq_fini(struct mlxsw_pci *mlxsw_pci,
400 struct mlxsw_pci_queue *q)
402 mlxsw_cmd_hw2sw_sdq(mlxsw_pci->core, q->num);
405 static int mlxsw_pci_sdq_dbg_read(struct seq_file *file, void *data)
407 struct mlxsw_pci *mlxsw_pci = dev_get_drvdata(file->private);
408 struct mlxsw_pci_queue *q;
410 static const char hdr[] =
411 "NUM PROD_COUNT CONS_COUNT COUNT\n";
413 seq_printf(file, hdr);
414 for (i = 0; i < mlxsw_pci_sdq_count(mlxsw_pci); i++) {
415 q = mlxsw_pci_sdq_get(mlxsw_pci, i);
416 spin_lock_bh(&q->lock);
417 seq_printf(file, "%3d %10d %10d %5d\n",
418 i, q->producer_counter, q->consumer_counter,
420 spin_unlock_bh(&q->lock);
425 static int mlxsw_pci_wqe_frag_map(struct mlxsw_pci *mlxsw_pci, char *wqe,
426 int index, char *frag_data, size_t frag_len,
429 struct pci_dev *pdev = mlxsw_pci->pdev;
432 mapaddr = pci_map_single(pdev, frag_data, frag_len, direction);
433 if (unlikely(pci_dma_mapping_error(pdev, mapaddr))) {
435 dev_err(&pdev->dev, "failed to dma map tx frag\n");
438 mlxsw_pci_wqe_address_set(wqe, index, mapaddr);
439 mlxsw_pci_wqe_byte_count_set(wqe, index, frag_len);
443 static void mlxsw_pci_wqe_frag_unmap(struct mlxsw_pci *mlxsw_pci, char *wqe,
444 int index, int direction)
446 struct pci_dev *pdev = mlxsw_pci->pdev;
447 size_t frag_len = mlxsw_pci_wqe_byte_count_get(wqe, index);
448 dma_addr_t mapaddr = mlxsw_pci_wqe_address_get(wqe, index);
452 pci_unmap_single(pdev, mapaddr, frag_len, direction);
455 static int mlxsw_pci_rdq_skb_alloc(struct mlxsw_pci *mlxsw_pci,
456 struct mlxsw_pci_queue_elem_info *elem_info)
458 size_t buf_len = MLXSW_PORT_MAX_MTU;
459 char *wqe = elem_info->elem;
463 elem_info->u.rdq.skb = NULL;
464 skb = netdev_alloc_skb_ip_align(NULL, buf_len);
468 /* Assume that wqe was previously zeroed. */
470 err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, 0, skb->data,
471 buf_len, DMA_FROM_DEVICE);
475 elem_info->u.rdq.skb = skb;
479 dev_kfree_skb_any(skb);
483 static void mlxsw_pci_rdq_skb_free(struct mlxsw_pci *mlxsw_pci,
484 struct mlxsw_pci_queue_elem_info *elem_info)
489 skb = elem_info->u.rdq.skb;
490 wqe = elem_info->elem;
492 mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, 0, DMA_FROM_DEVICE);
493 dev_kfree_skb_any(skb);
496 static int mlxsw_pci_rdq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
497 struct mlxsw_pci_queue *q)
499 struct mlxsw_pci_queue_elem_info *elem_info;
500 u8 sdq_count = mlxsw_pci_sdq_count(mlxsw_pci);
504 q->producer_counter = 0;
505 q->consumer_counter = 0;
507 /* Set CQ of same number of this RDQ with base
508 * above SDQ count as the lower ones are assigned to SDQs.
510 mlxsw_cmd_mbox_sw2hw_dq_cq_set(mbox, sdq_count + q->num);
511 mlxsw_cmd_mbox_sw2hw_dq_log2_dq_sz_set(mbox, 3); /* 8 pages */
512 for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
513 dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
515 mlxsw_cmd_mbox_sw2hw_dq_pa_set(mbox, i, mapaddr);
518 err = mlxsw_cmd_sw2hw_rdq(mlxsw_pci->core, mbox, q->num);
522 mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
524 for (i = 0; i < q->count; i++) {
525 elem_info = mlxsw_pci_queue_elem_info_producer_get(q);
527 err = mlxsw_pci_rdq_skb_alloc(mlxsw_pci, elem_info);
530 /* Everything is set up, ring doorbell to pass elem to HW */
531 q->producer_counter++;
532 mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
538 for (i--; i >= 0; i--) {
539 elem_info = mlxsw_pci_queue_elem_info_get(q, i);
540 mlxsw_pci_rdq_skb_free(mlxsw_pci, elem_info);
542 mlxsw_cmd_hw2sw_rdq(mlxsw_pci->core, q->num);
547 static void mlxsw_pci_rdq_fini(struct mlxsw_pci *mlxsw_pci,
548 struct mlxsw_pci_queue *q)
550 struct mlxsw_pci_queue_elem_info *elem_info;
553 mlxsw_cmd_hw2sw_rdq(mlxsw_pci->core, q->num);
554 for (i = 0; i < q->count; i++) {
555 elem_info = mlxsw_pci_queue_elem_info_get(q, i);
556 mlxsw_pci_rdq_skb_free(mlxsw_pci, elem_info);
560 static int mlxsw_pci_rdq_dbg_read(struct seq_file *file, void *data)
562 struct mlxsw_pci *mlxsw_pci = dev_get_drvdata(file->private);
563 struct mlxsw_pci_queue *q;
565 static const char hdr[] =
566 "NUM PROD_COUNT CONS_COUNT COUNT\n";
568 seq_printf(file, hdr);
569 for (i = 0; i < mlxsw_pci_rdq_count(mlxsw_pci); i++) {
570 q = mlxsw_pci_rdq_get(mlxsw_pci, i);
571 spin_lock_bh(&q->lock);
572 seq_printf(file, "%3d %10d %10d %5d\n",
573 i, q->producer_counter, q->consumer_counter,
575 spin_unlock_bh(&q->lock);
580 static int mlxsw_pci_cq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
581 struct mlxsw_pci_queue *q)
586 q->consumer_counter = 0;
588 for (i = 0; i < q->count; i++) {
589 char *elem = mlxsw_pci_queue_elem_get(q, i);
591 mlxsw_pci_cqe_owner_set(elem, 1);
594 mlxsw_cmd_mbox_sw2hw_cq_cv_set(mbox, 0); /* CQE ver 0 */
595 mlxsw_cmd_mbox_sw2hw_cq_c_eqn_set(mbox, MLXSW_PCI_EQ_COMP_NUM);
596 mlxsw_cmd_mbox_sw2hw_cq_oi_set(mbox, 0);
597 mlxsw_cmd_mbox_sw2hw_cq_st_set(mbox, 0);
598 mlxsw_cmd_mbox_sw2hw_cq_log_cq_size_set(mbox, ilog2(q->count));
599 for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
600 dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
602 mlxsw_cmd_mbox_sw2hw_cq_pa_set(mbox, i, mapaddr);
604 err = mlxsw_cmd_sw2hw_cq(mlxsw_pci->core, mbox, q->num);
607 mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
608 mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
612 static void mlxsw_pci_cq_fini(struct mlxsw_pci *mlxsw_pci,
613 struct mlxsw_pci_queue *q)
615 mlxsw_cmd_hw2sw_cq(mlxsw_pci->core, q->num);
618 static int mlxsw_pci_cq_dbg_read(struct seq_file *file, void *data)
620 struct mlxsw_pci *mlxsw_pci = dev_get_drvdata(file->private);
622 struct mlxsw_pci_queue *q;
624 static const char hdr[] =
625 "NUM CONS_INDEX SDQ_COUNT RDQ_COUNT COUNT\n";
627 seq_printf(file, hdr);
628 for (i = 0; i < mlxsw_pci_cq_count(mlxsw_pci); i++) {
629 q = mlxsw_pci_cq_get(mlxsw_pci, i);
630 spin_lock_bh(&q->lock);
631 seq_printf(file, "%3d %10d %10d %10d %5d\n",
632 i, q->consumer_counter, q->u.cq.comp_sdq_count,
633 q->u.cq.comp_rdq_count, q->count);
634 spin_unlock_bh(&q->lock);
639 static void mlxsw_pci_cqe_sdq_handle(struct mlxsw_pci *mlxsw_pci,
640 struct mlxsw_pci_queue *q,
641 u16 consumer_counter_limit,
644 struct pci_dev *pdev = mlxsw_pci->pdev;
645 struct mlxsw_pci_queue_elem_info *elem_info;
651 elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
652 skb = elem_info->u.sdq.skb;
653 wqe = elem_info->elem;
654 for (i = 0; i < MLXSW_PCI_WQE_SG_ENTRIES; i++)
655 mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, i, DMA_TO_DEVICE);
656 dev_kfree_skb_any(skb);
657 elem_info->u.sdq.skb = NULL;
659 if (q->consumer_counter++ != consumer_counter_limit)
660 dev_dbg_ratelimited(&pdev->dev, "Consumer counter does not match limit in SDQ\n");
661 spin_unlock(&q->lock);
664 static void mlxsw_pci_cqe_rdq_handle(struct mlxsw_pci *mlxsw_pci,
665 struct mlxsw_pci_queue *q,
666 u16 consumer_counter_limit,
669 struct pci_dev *pdev = mlxsw_pci->pdev;
670 struct mlxsw_pci_queue_elem_info *elem_info;
673 struct mlxsw_rx_info rx_info;
677 elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
678 skb = elem_info->u.sdq.skb;
681 wqe = elem_info->elem;
682 mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, 0, DMA_FROM_DEVICE);
684 if (q->consumer_counter++ != consumer_counter_limit)
685 dev_dbg_ratelimited(&pdev->dev, "Consumer counter does not match limit in RDQ\n");
687 /* We do not support lag now */
688 if (mlxsw_pci_cqe_lag_get(cqe))
691 rx_info.sys_port = mlxsw_pci_cqe_system_port_get(cqe);
692 rx_info.trap_id = mlxsw_pci_cqe_trap_id_get(cqe);
694 byte_count = mlxsw_pci_cqe_byte_count_get(cqe);
695 if (mlxsw_pci_cqe_crc_get(cqe))
696 byte_count -= ETH_FCS_LEN;
697 skb_put(skb, byte_count);
698 mlxsw_core_skb_receive(mlxsw_pci->core, skb, &rx_info);
701 memset(wqe, 0, q->elem_size);
702 err = mlxsw_pci_rdq_skb_alloc(mlxsw_pci, elem_info);
703 if (err && net_ratelimit())
704 dev_dbg(&pdev->dev, "Failed to alloc skb for RDQ\n");
705 /* Everything is set up, ring doorbell to pass elem to HW */
706 q->producer_counter++;
707 mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
711 dev_kfree_skb_any(skb);
715 static char *mlxsw_pci_cq_sw_cqe_get(struct mlxsw_pci_queue *q)
717 return mlxsw_pci_queue_sw_elem_get(q, mlxsw_pci_cqe_owner_get);
720 static void mlxsw_pci_cq_tasklet(unsigned long data)
722 struct mlxsw_pci_queue *q = (struct mlxsw_pci_queue *) data;
723 struct mlxsw_pci *mlxsw_pci = q->pci;
726 int credits = q->count >> 1;
728 while ((cqe = mlxsw_pci_cq_sw_cqe_get(q))) {
729 u16 wqe_counter = mlxsw_pci_cqe_wqe_counter_get(cqe);
730 u8 sendq = mlxsw_pci_cqe_sr_get(cqe);
731 u8 dqn = mlxsw_pci_cqe_dqn_get(cqe);
734 struct mlxsw_pci_queue *sdq;
736 sdq = mlxsw_pci_sdq_get(mlxsw_pci, dqn);
737 mlxsw_pci_cqe_sdq_handle(mlxsw_pci, sdq,
739 q->u.cq.comp_sdq_count++;
741 struct mlxsw_pci_queue *rdq;
743 rdq = mlxsw_pci_rdq_get(mlxsw_pci, dqn);
744 mlxsw_pci_cqe_rdq_handle(mlxsw_pci, rdq,
746 q->u.cq.comp_rdq_count++;
748 if (++items == credits)
752 mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
753 mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
757 static int mlxsw_pci_eq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
758 struct mlxsw_pci_queue *q)
763 q->consumer_counter = 0;
765 for (i = 0; i < q->count; i++) {
766 char *elem = mlxsw_pci_queue_elem_get(q, i);
768 mlxsw_pci_eqe_owner_set(elem, 1);
771 mlxsw_cmd_mbox_sw2hw_eq_int_msix_set(mbox, 1); /* MSI-X used */
772 mlxsw_cmd_mbox_sw2hw_eq_oi_set(mbox, 0);
773 mlxsw_cmd_mbox_sw2hw_eq_st_set(mbox, 1); /* armed */
774 mlxsw_cmd_mbox_sw2hw_eq_log_eq_size_set(mbox, ilog2(q->count));
775 for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
776 dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
778 mlxsw_cmd_mbox_sw2hw_eq_pa_set(mbox, i, mapaddr);
780 err = mlxsw_cmd_sw2hw_eq(mlxsw_pci->core, mbox, q->num);
783 mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
784 mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
788 static void mlxsw_pci_eq_fini(struct mlxsw_pci *mlxsw_pci,
789 struct mlxsw_pci_queue *q)
791 mlxsw_cmd_hw2sw_eq(mlxsw_pci->core, q->num);
794 static int mlxsw_pci_eq_dbg_read(struct seq_file *file, void *data)
796 struct mlxsw_pci *mlxsw_pci = dev_get_drvdata(file->private);
797 struct mlxsw_pci_queue *q;
799 static const char hdr[] =
800 "NUM CONS_COUNT EV_CMD EV_COMP EV_OTHER COUNT\n";
802 seq_printf(file, hdr);
803 for (i = 0; i < mlxsw_pci_eq_count(mlxsw_pci); i++) {
804 q = mlxsw_pci_eq_get(mlxsw_pci, i);
805 spin_lock_bh(&q->lock);
806 seq_printf(file, "%3d %10d %10d %10d %10d %5d\n",
807 i, q->consumer_counter, q->u.eq.ev_cmd_count,
808 q->u.eq.ev_comp_count, q->u.eq.ev_other_count,
810 spin_unlock_bh(&q->lock);
815 static void mlxsw_pci_eq_cmd_event(struct mlxsw_pci *mlxsw_pci, char *eqe)
817 mlxsw_pci->cmd.comp.status = mlxsw_pci_eqe_cmd_status_get(eqe);
818 mlxsw_pci->cmd.comp.out_param =
819 ((u64) mlxsw_pci_eqe_cmd_out_param_h_get(eqe)) << 32 |
820 mlxsw_pci_eqe_cmd_out_param_l_get(eqe);
821 mlxsw_pci->cmd.wait_done = true;
822 wake_up(&mlxsw_pci->cmd.wait);
825 static char *mlxsw_pci_eq_sw_eqe_get(struct mlxsw_pci_queue *q)
827 return mlxsw_pci_queue_sw_elem_get(q, mlxsw_pci_eqe_owner_get);
830 static void mlxsw_pci_eq_tasklet(unsigned long data)
832 struct mlxsw_pci_queue *q = (struct mlxsw_pci_queue *) data;
833 struct mlxsw_pci *mlxsw_pci = q->pci;
834 u8 cq_count = mlxsw_pci_cq_count(mlxsw_pci);
835 unsigned long active_cqns[BITS_TO_LONGS(MLXSW_PCI_CQS_MAX)];
838 bool cq_handle = false;
840 int credits = q->count >> 1;
842 memset(&active_cqns, 0, sizeof(active_cqns));
844 while ((eqe = mlxsw_pci_eq_sw_eqe_get(q))) {
845 u8 event_type = mlxsw_pci_eqe_event_type_get(eqe);
847 switch (event_type) {
848 case MLXSW_PCI_EQE_EVENT_TYPE_CMD:
849 mlxsw_pci_eq_cmd_event(mlxsw_pci, eqe);
850 q->u.eq.ev_cmd_count++;
852 case MLXSW_PCI_EQE_EVENT_TYPE_COMP:
853 cqn = mlxsw_pci_eqe_cqn_get(eqe);
854 set_bit(cqn, active_cqns);
856 q->u.eq.ev_comp_count++;
859 q->u.eq.ev_other_count++;
861 if (++items == credits)
865 mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
866 mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
871 for_each_set_bit(cqn, active_cqns, cq_count) {
872 q = mlxsw_pci_cq_get(mlxsw_pci, cqn);
873 mlxsw_pci_queue_tasklet_schedule(q);
877 struct mlxsw_pci_queue_ops {
879 enum mlxsw_pci_queue_type type;
880 int (*init)(struct mlxsw_pci *mlxsw_pci, char *mbox,
881 struct mlxsw_pci_queue *q);
882 void (*fini)(struct mlxsw_pci *mlxsw_pci,
883 struct mlxsw_pci_queue *q);
884 void (*tasklet)(unsigned long data);
885 int (*dbg_read)(struct seq_file *s, void *data);
890 static const struct mlxsw_pci_queue_ops mlxsw_pci_sdq_ops = {
891 .type = MLXSW_PCI_QUEUE_TYPE_SDQ,
892 .init = mlxsw_pci_sdq_init,
893 .fini = mlxsw_pci_sdq_fini,
894 .dbg_read = mlxsw_pci_sdq_dbg_read,
895 .elem_count = MLXSW_PCI_WQE_COUNT,
896 .elem_size = MLXSW_PCI_WQE_SIZE,
899 static const struct mlxsw_pci_queue_ops mlxsw_pci_rdq_ops = {
900 .type = MLXSW_PCI_QUEUE_TYPE_RDQ,
901 .init = mlxsw_pci_rdq_init,
902 .fini = mlxsw_pci_rdq_fini,
903 .dbg_read = mlxsw_pci_rdq_dbg_read,
904 .elem_count = MLXSW_PCI_WQE_COUNT,
905 .elem_size = MLXSW_PCI_WQE_SIZE
908 static const struct mlxsw_pci_queue_ops mlxsw_pci_cq_ops = {
909 .type = MLXSW_PCI_QUEUE_TYPE_CQ,
910 .init = mlxsw_pci_cq_init,
911 .fini = mlxsw_pci_cq_fini,
912 .tasklet = mlxsw_pci_cq_tasklet,
913 .dbg_read = mlxsw_pci_cq_dbg_read,
914 .elem_count = MLXSW_PCI_CQE_COUNT,
915 .elem_size = MLXSW_PCI_CQE_SIZE
918 static const struct mlxsw_pci_queue_ops mlxsw_pci_eq_ops = {
919 .type = MLXSW_PCI_QUEUE_TYPE_EQ,
920 .init = mlxsw_pci_eq_init,
921 .fini = mlxsw_pci_eq_fini,
922 .tasklet = mlxsw_pci_eq_tasklet,
923 .dbg_read = mlxsw_pci_eq_dbg_read,
924 .elem_count = MLXSW_PCI_EQE_COUNT,
925 .elem_size = MLXSW_PCI_EQE_SIZE
928 static int mlxsw_pci_queue_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
929 const struct mlxsw_pci_queue_ops *q_ops,
930 struct mlxsw_pci_queue *q, u8 q_num)
932 struct mlxsw_pci_mem_item *mem_item = &q->mem_item;
936 spin_lock_init(&q->lock);
938 q->count = q_ops->elem_count;
939 q->elem_size = q_ops->elem_size;
940 q->type = q_ops->type;
944 tasklet_init(&q->tasklet, q_ops->tasklet, (unsigned long) q);
946 mem_item->size = MLXSW_PCI_AQ_SIZE;
947 mem_item->buf = pci_alloc_consistent(mlxsw_pci->pdev,
952 memset(mem_item->buf, 0, mem_item->size);
954 q->elem_info = kcalloc(q->count, sizeof(*q->elem_info), GFP_KERNEL);
957 goto err_elem_info_alloc;
960 /* Initialize dma mapped elements info elem_info for
961 * future easy access.
963 for (i = 0; i < q->count; i++) {
964 struct mlxsw_pci_queue_elem_info *elem_info;
966 elem_info = mlxsw_pci_queue_elem_info_get(q, i);
968 __mlxsw_pci_queue_elem_get(q, q_ops->elem_size, i);
971 mlxsw_cmd_mbox_zero(mbox);
972 err = q_ops->init(mlxsw_pci, mbox, q);
980 pci_free_consistent(mlxsw_pci->pdev, mem_item->size,
981 mem_item->buf, mem_item->mapaddr);
985 static void mlxsw_pci_queue_fini(struct mlxsw_pci *mlxsw_pci,
986 const struct mlxsw_pci_queue_ops *q_ops,
987 struct mlxsw_pci_queue *q)
989 struct mlxsw_pci_mem_item *mem_item = &q->mem_item;
991 q_ops->fini(mlxsw_pci, q);
993 pci_free_consistent(mlxsw_pci->pdev, mem_item->size,
994 mem_item->buf, mem_item->mapaddr);
997 static int mlxsw_pci_queue_group_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
998 const struct mlxsw_pci_queue_ops *q_ops,
1001 struct pci_dev *pdev = mlxsw_pci->pdev;
1002 struct mlxsw_pci_queue_type_group *queue_group;
1007 queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_ops->type);
1008 queue_group->q = kcalloc(num_qs, sizeof(*queue_group->q), GFP_KERNEL);
1009 if (!queue_group->q)
1012 for (i = 0; i < num_qs; i++) {
1013 err = mlxsw_pci_queue_init(mlxsw_pci, mbox, q_ops,
1014 &queue_group->q[i], i);
1016 goto err_queue_init;
1018 queue_group->count = num_qs;
1020 sprintf(tmp, "%s_stats", mlxsw_pci_queue_type_str(q_ops->type));
1021 debugfs_create_devm_seqfile(&pdev->dev, tmp, mlxsw_pci->dbg_dir,
1027 for (i--; i >= 0; i--)
1028 mlxsw_pci_queue_fini(mlxsw_pci, q_ops, &queue_group->q[i]);
1029 kfree(queue_group->q);
1033 static void mlxsw_pci_queue_group_fini(struct mlxsw_pci *mlxsw_pci,
1034 const struct mlxsw_pci_queue_ops *q_ops)
1036 struct mlxsw_pci_queue_type_group *queue_group;
1039 queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_ops->type);
1040 for (i = 0; i < queue_group->count; i++)
1041 mlxsw_pci_queue_fini(mlxsw_pci, q_ops, &queue_group->q[i]);
1042 kfree(queue_group->q);
1045 static int mlxsw_pci_aqs_init(struct mlxsw_pci *mlxsw_pci, char *mbox)
1047 struct pci_dev *pdev = mlxsw_pci->pdev;
1058 mlxsw_cmd_mbox_zero(mbox);
1059 err = mlxsw_cmd_query_aq_cap(mlxsw_pci->core, mbox);
1063 num_sdqs = mlxsw_cmd_mbox_query_aq_cap_max_num_sdqs_get(mbox);
1064 sdq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_sdq_sz_get(mbox);
1065 num_rdqs = mlxsw_cmd_mbox_query_aq_cap_max_num_rdqs_get(mbox);
1066 rdq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_rdq_sz_get(mbox);
1067 num_cqs = mlxsw_cmd_mbox_query_aq_cap_max_num_cqs_get(mbox);
1068 cq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_cq_sz_get(mbox);
1069 num_eqs = mlxsw_cmd_mbox_query_aq_cap_max_num_eqs_get(mbox);
1070 eq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_eq_sz_get(mbox);
1072 if ((num_sdqs != MLXSW_PCI_SDQS_COUNT) ||
1073 (num_rdqs != MLXSW_PCI_RDQS_COUNT) ||
1074 num_cqs > MLXSW_PCI_CQS_MAX || num_eqs != MLXSW_PCI_EQS_COUNT) {
1075 dev_err(&pdev->dev, "Unsupported number of queues\n");
1079 if ((1 << sdq_log2sz != MLXSW_PCI_WQE_COUNT) ||
1080 (1 << rdq_log2sz != MLXSW_PCI_WQE_COUNT) ||
1081 (1 << cq_log2sz != MLXSW_PCI_CQE_COUNT) ||
1082 (1 << eq_log2sz != MLXSW_PCI_EQE_COUNT)) {
1083 dev_err(&pdev->dev, "Unsupported number of async queue descriptors\n");
1087 err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_eq_ops,
1090 dev_err(&pdev->dev, "Failed to initialize event queues\n");
1094 err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_cq_ops,
1097 dev_err(&pdev->dev, "Failed to initialize completion queues\n");
1101 err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_sdq_ops,
1104 dev_err(&pdev->dev, "Failed to initialize send descriptor queues\n");
1108 err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_rdq_ops,
1111 dev_err(&pdev->dev, "Failed to initialize receive descriptor queues\n");
1115 /* We have to poll in command interface until queues are initialized */
1116 mlxsw_pci->cmd.nopoll = true;
1120 mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_sdq_ops);
1122 mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_cq_ops);
1124 mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_eq_ops);
1128 static void mlxsw_pci_aqs_fini(struct mlxsw_pci *mlxsw_pci)
1130 mlxsw_pci->cmd.nopoll = false;
1131 mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_rdq_ops);
1132 mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_sdq_ops);
1133 mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_cq_ops);
1134 mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_eq_ops);
1138 mlxsw_pci_config_profile_swid_config(struct mlxsw_pci *mlxsw_pci,
1139 char *mbox, int index,
1140 const struct mlxsw_swid_config *swid)
1144 if (swid->used_type) {
1145 mlxsw_cmd_mbox_config_profile_swid_config_type_set(
1146 mbox, index, swid->type);
1149 if (swid->used_properties) {
1150 mlxsw_cmd_mbox_config_profile_swid_config_properties_set(
1151 mbox, index, swid->properties);
1154 mlxsw_cmd_mbox_config_profile_swid_config_mask_set(mbox, index, mask);
1157 static int mlxsw_pci_config_profile(struct mlxsw_pci *mlxsw_pci, char *mbox,
1158 const struct mlxsw_config_profile *profile)
1162 mlxsw_cmd_mbox_zero(mbox);
1164 if (profile->used_max_vepa_channels) {
1165 mlxsw_cmd_mbox_config_profile_set_max_vepa_channels_set(
1167 mlxsw_cmd_mbox_config_profile_max_vepa_channels_set(
1168 mbox, profile->max_vepa_channels);
1170 if (profile->used_max_lag) {
1171 mlxsw_cmd_mbox_config_profile_set_max_lag_set(
1173 mlxsw_cmd_mbox_config_profile_max_lag_set(
1174 mbox, profile->max_lag);
1176 if (profile->used_max_port_per_lag) {
1177 mlxsw_cmd_mbox_config_profile_set_max_port_per_lag_set(
1179 mlxsw_cmd_mbox_config_profile_max_port_per_lag_set(
1180 mbox, profile->max_port_per_lag);
1182 if (profile->used_max_mid) {
1183 mlxsw_cmd_mbox_config_profile_set_max_mid_set(
1185 mlxsw_cmd_mbox_config_profile_max_mid_set(
1186 mbox, profile->max_mid);
1188 if (profile->used_max_pgt) {
1189 mlxsw_cmd_mbox_config_profile_set_max_pgt_set(
1191 mlxsw_cmd_mbox_config_profile_max_pgt_set(
1192 mbox, profile->max_pgt);
1194 if (profile->used_max_system_port) {
1195 mlxsw_cmd_mbox_config_profile_set_max_system_port_set(
1197 mlxsw_cmd_mbox_config_profile_max_system_port_set(
1198 mbox, profile->max_system_port);
1200 if (profile->used_max_vlan_groups) {
1201 mlxsw_cmd_mbox_config_profile_set_max_vlan_groups_set(
1203 mlxsw_cmd_mbox_config_profile_max_vlan_groups_set(
1204 mbox, profile->max_vlan_groups);
1206 if (profile->used_max_regions) {
1207 mlxsw_cmd_mbox_config_profile_set_max_regions_set(
1209 mlxsw_cmd_mbox_config_profile_max_regions_set(
1210 mbox, profile->max_regions);
1212 if (profile->used_flood_tables) {
1213 mlxsw_cmd_mbox_config_profile_set_flood_tables_set(
1215 mlxsw_cmd_mbox_config_profile_max_flood_tables_set(
1216 mbox, profile->max_flood_tables);
1217 mlxsw_cmd_mbox_config_profile_max_vid_flood_tables_set(
1218 mbox, profile->max_vid_flood_tables);
1220 if (profile->used_flood_mode) {
1221 mlxsw_cmd_mbox_config_profile_set_flood_mode_set(
1223 mlxsw_cmd_mbox_config_profile_flood_mode_set(
1224 mbox, profile->flood_mode);
1226 if (profile->used_max_ib_mc) {
1227 mlxsw_cmd_mbox_config_profile_set_max_ib_mc_set(
1229 mlxsw_cmd_mbox_config_profile_max_ib_mc_set(
1230 mbox, profile->max_ib_mc);
1232 if (profile->used_max_pkey) {
1233 mlxsw_cmd_mbox_config_profile_set_max_pkey_set(
1235 mlxsw_cmd_mbox_config_profile_max_pkey_set(
1236 mbox, profile->max_pkey);
1238 if (profile->used_ar_sec) {
1239 mlxsw_cmd_mbox_config_profile_set_ar_sec_set(
1241 mlxsw_cmd_mbox_config_profile_ar_sec_set(
1242 mbox, profile->ar_sec);
1244 if (profile->used_adaptive_routing_group_cap) {
1245 mlxsw_cmd_mbox_config_profile_set_adaptive_routing_group_cap_set(
1247 mlxsw_cmd_mbox_config_profile_adaptive_routing_group_cap_set(
1248 mbox, profile->adaptive_routing_group_cap);
1251 for (i = 0; i < MLXSW_CONFIG_PROFILE_SWID_COUNT; i++)
1252 mlxsw_pci_config_profile_swid_config(mlxsw_pci, mbox, i,
1253 &profile->swid_config[i]);
1255 return mlxsw_cmd_config_profile_set(mlxsw_pci->core, mbox);
1258 static int mlxsw_pci_boardinfo(struct mlxsw_pci *mlxsw_pci, char *mbox)
1260 struct mlxsw_bus_info *bus_info = &mlxsw_pci->bus_info;
1263 mlxsw_cmd_mbox_zero(mbox);
1264 err = mlxsw_cmd_boardinfo(mlxsw_pci->core, mbox);
1267 mlxsw_cmd_mbox_boardinfo_vsd_memcpy_from(mbox, bus_info->vsd);
1268 mlxsw_cmd_mbox_boardinfo_psid_memcpy_from(mbox, bus_info->psid);
1272 static int mlxsw_pci_fw_area_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
1275 struct mlxsw_pci_mem_item *mem_item;
1279 mlxsw_pci->fw_area.items = kcalloc(num_pages, sizeof(*mem_item),
1281 if (!mlxsw_pci->fw_area.items)
1283 mlxsw_pci->fw_area.num_pages = num_pages;
1285 mlxsw_cmd_mbox_zero(mbox);
1286 for (i = 0; i < num_pages; i++) {
1287 mem_item = &mlxsw_pci->fw_area.items[i];
1289 mem_item->size = MLXSW_PCI_PAGE_SIZE;
1290 mem_item->buf = pci_alloc_consistent(mlxsw_pci->pdev,
1292 &mem_item->mapaddr);
1293 if (!mem_item->buf) {
1297 mlxsw_cmd_mbox_map_fa_pa_set(mbox, i, mem_item->mapaddr);
1298 mlxsw_cmd_mbox_map_fa_log2size_set(mbox, i, 0); /* 1 page */
1301 err = mlxsw_cmd_map_fa(mlxsw_pci->core, mbox, num_pages);
1303 goto err_cmd_map_fa;
1309 for (i--; i >= 0; i--) {
1310 mem_item = &mlxsw_pci->fw_area.items[i];
1312 pci_free_consistent(mlxsw_pci->pdev, mem_item->size,
1313 mem_item->buf, mem_item->mapaddr);
1315 kfree(mlxsw_pci->fw_area.items);
1319 static void mlxsw_pci_fw_area_fini(struct mlxsw_pci *mlxsw_pci)
1321 struct mlxsw_pci_mem_item *mem_item;
1324 mlxsw_cmd_unmap_fa(mlxsw_pci->core);
1326 for (i = 0; i < mlxsw_pci->fw_area.num_pages; i++) {
1327 mem_item = &mlxsw_pci->fw_area.items[i];
1329 pci_free_consistent(mlxsw_pci->pdev, mem_item->size,
1330 mem_item->buf, mem_item->mapaddr);
1332 kfree(mlxsw_pci->fw_area.items);
1335 static irqreturn_t mlxsw_pci_eq_irq_handler(int irq, void *dev_id)
1337 struct mlxsw_pci *mlxsw_pci = dev_id;
1338 struct mlxsw_pci_queue *q;
1341 for (i = 0; i < MLXSW_PCI_EQS_COUNT; i++) {
1342 q = mlxsw_pci_eq_get(mlxsw_pci, i);
1343 mlxsw_pci_queue_tasklet_schedule(q);
1348 static int mlxsw_pci_mbox_alloc(struct mlxsw_pci *mlxsw_pci,
1349 struct mlxsw_pci_mem_item *mbox)
1351 struct pci_dev *pdev = mlxsw_pci->pdev;
1354 mbox->size = MLXSW_CMD_MBOX_SIZE;
1355 mbox->buf = pci_alloc_consistent(pdev, MLXSW_CMD_MBOX_SIZE,
1358 dev_err(&pdev->dev, "Failed allocating memory for mailbox\n");
1365 static void mlxsw_pci_mbox_free(struct mlxsw_pci *mlxsw_pci,
1366 struct mlxsw_pci_mem_item *mbox)
1368 struct pci_dev *pdev = mlxsw_pci->pdev;
1370 pci_free_consistent(pdev, MLXSW_CMD_MBOX_SIZE, mbox->buf,
1374 static int mlxsw_pci_init(void *bus_priv, struct mlxsw_core *mlxsw_core,
1375 const struct mlxsw_config_profile *profile)
1377 struct mlxsw_pci *mlxsw_pci = bus_priv;
1378 struct pci_dev *pdev = mlxsw_pci->pdev;
1383 mutex_init(&mlxsw_pci->cmd.lock);
1384 init_waitqueue_head(&mlxsw_pci->cmd.wait);
1386 mlxsw_pci->core = mlxsw_core;
1388 mbox = mlxsw_cmd_mbox_alloc();
1392 err = mlxsw_pci_mbox_alloc(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
1396 err = mlxsw_pci_mbox_alloc(mlxsw_pci, &mlxsw_pci->cmd.out_mbox);
1398 goto err_out_mbox_alloc;
1400 err = mlxsw_cmd_query_fw(mlxsw_core, mbox);
1404 mlxsw_pci->bus_info.fw_rev.major =
1405 mlxsw_cmd_mbox_query_fw_fw_rev_major_get(mbox);
1406 mlxsw_pci->bus_info.fw_rev.minor =
1407 mlxsw_cmd_mbox_query_fw_fw_rev_minor_get(mbox);
1408 mlxsw_pci->bus_info.fw_rev.subminor =
1409 mlxsw_cmd_mbox_query_fw_fw_rev_subminor_get(mbox);
1411 if (mlxsw_cmd_mbox_query_fw_cmd_interface_rev_get(mbox) != 1) {
1412 dev_err(&pdev->dev, "Unsupported cmd interface revision ID queried from hw\n");
1416 if (mlxsw_cmd_mbox_query_fw_doorbell_page_bar_get(mbox) != 0) {
1417 dev_err(&pdev->dev, "Unsupported doorbell page bar queried from hw\n");
1419 goto err_doorbell_page_bar;
1422 mlxsw_pci->doorbell_offset =
1423 mlxsw_cmd_mbox_query_fw_doorbell_page_offset_get(mbox);
1425 num_pages = mlxsw_cmd_mbox_query_fw_fw_pages_get(mbox);
1426 err = mlxsw_pci_fw_area_init(mlxsw_pci, mbox, num_pages);
1428 goto err_fw_area_init;
1430 err = mlxsw_pci_boardinfo(mlxsw_pci, mbox);
1434 err = mlxsw_pci_config_profile(mlxsw_pci, mbox, profile);
1436 goto err_config_profile;
1438 err = mlxsw_pci_aqs_init(mlxsw_pci, mbox);
1442 err = request_irq(mlxsw_pci->msix_entry.vector,
1443 mlxsw_pci_eq_irq_handler, 0,
1444 mlxsw_pci_driver_name, mlxsw_pci);
1446 dev_err(&pdev->dev, "IRQ request failed\n");
1447 goto err_request_eq_irq;
1453 mlxsw_pci_aqs_fini(mlxsw_pci);
1457 mlxsw_pci_fw_area_fini(mlxsw_pci);
1459 err_doorbell_page_bar:
1462 mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.out_mbox);
1464 mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
1466 mlxsw_cmd_mbox_free(mbox);
1470 static void mlxsw_pci_fini(void *bus_priv)
1472 struct mlxsw_pci *mlxsw_pci = bus_priv;
1474 free_irq(mlxsw_pci->msix_entry.vector, mlxsw_pci);
1475 mlxsw_pci_aqs_fini(mlxsw_pci);
1476 mlxsw_pci_fw_area_fini(mlxsw_pci);
1477 mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.out_mbox);
1478 mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
1481 static struct mlxsw_pci_queue *
1482 mlxsw_pci_sdq_pick(struct mlxsw_pci *mlxsw_pci,
1483 const struct mlxsw_tx_info *tx_info)
1485 u8 sdqn = tx_info->local_port % mlxsw_pci_sdq_count(mlxsw_pci);
1487 return mlxsw_pci_sdq_get(mlxsw_pci, sdqn);
1490 static bool mlxsw_pci_skb_transmit_busy(void *bus_priv,
1491 const struct mlxsw_tx_info *tx_info)
1493 struct mlxsw_pci *mlxsw_pci = bus_priv;
1494 struct mlxsw_pci_queue *q = mlxsw_pci_sdq_pick(mlxsw_pci, tx_info);
1496 return !mlxsw_pci_queue_elem_info_producer_get(q);
1499 static int mlxsw_pci_skb_transmit(void *bus_priv, struct sk_buff *skb,
1500 const struct mlxsw_tx_info *tx_info)
1502 struct mlxsw_pci *mlxsw_pci = bus_priv;
1503 struct mlxsw_pci_queue *q;
1504 struct mlxsw_pci_queue_elem_info *elem_info;
1509 if (skb_shinfo(skb)->nr_frags > MLXSW_PCI_WQE_SG_ENTRIES - 1) {
1510 err = skb_linearize(skb);
1515 q = mlxsw_pci_sdq_pick(mlxsw_pci, tx_info);
1516 spin_lock_bh(&q->lock);
1517 elem_info = mlxsw_pci_queue_elem_info_producer_get(q);
1523 elem_info->u.sdq.skb = skb;
1525 wqe = elem_info->elem;
1526 mlxsw_pci_wqe_c_set(wqe, 1); /* always report completion */
1527 mlxsw_pci_wqe_lp_set(wqe, !!tx_info->is_emad);
1528 mlxsw_pci_wqe_type_set(wqe, MLXSW_PCI_WQE_TYPE_ETHERNET);
1530 err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, 0, skb->data,
1531 skb_headlen(skb), DMA_TO_DEVICE);
1535 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1536 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1538 err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, i + 1,
1539 skb_frag_address(frag),
1540 skb_frag_size(frag),
1546 /* Set unused sq entries byte count to zero. */
1547 for (i++; i < MLXSW_PCI_WQE_SG_ENTRIES; i++)
1548 mlxsw_pci_wqe_byte_count_set(wqe, i, 0);
1550 /* Everything is set up, ring producer doorbell to get HW going */
1551 q->producer_counter++;
1552 mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
1558 mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, i, DMA_TO_DEVICE);
1560 spin_unlock_bh(&q->lock);
1564 static int mlxsw_pci_cmd_exec(void *bus_priv, u16 opcode, u8 opcode_mod,
1565 u32 in_mod, bool out_mbox_direct,
1566 char *in_mbox, size_t in_mbox_size,
1567 char *out_mbox, size_t out_mbox_size,
1570 struct mlxsw_pci *mlxsw_pci = bus_priv;
1571 dma_addr_t in_mapaddr = mlxsw_pci->cmd.in_mbox.mapaddr;
1572 dma_addr_t out_mapaddr = mlxsw_pci->cmd.out_mbox.mapaddr;
1573 bool evreq = mlxsw_pci->cmd.nopoll;
1574 unsigned long timeout = msecs_to_jiffies(MLXSW_PCI_CIR_TIMEOUT_MSECS);
1575 bool *p_wait_done = &mlxsw_pci->cmd.wait_done;
1578 *p_status = MLXSW_CMD_STATUS_OK;
1580 err = mutex_lock_interruptible(&mlxsw_pci->cmd.lock);
1585 memcpy(mlxsw_pci->cmd.in_mbox.buf, in_mbox, in_mbox_size);
1586 mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_HI, in_mapaddr >> 32);
1587 mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_LO, in_mapaddr);
1589 mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_HI, out_mapaddr >> 32);
1590 mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_LO, out_mapaddr);
1592 mlxsw_pci_write32(mlxsw_pci, CIR_IN_MODIFIER, in_mod);
1593 mlxsw_pci_write32(mlxsw_pci, CIR_TOKEN, 0);
1595 *p_wait_done = false;
1597 wmb(); /* all needs to be written before we write control register */
1598 mlxsw_pci_write32(mlxsw_pci, CIR_CTRL,
1599 MLXSW_PCI_CIR_CTRL_GO_BIT |
1600 (evreq ? MLXSW_PCI_CIR_CTRL_EVREQ_BIT : 0) |
1601 (opcode_mod << MLXSW_PCI_CIR_CTRL_OPCODE_MOD_SHIFT) |
1607 end = jiffies + timeout;
1609 u32 ctrl = mlxsw_pci_read32(mlxsw_pci, CIR_CTRL);
1611 if (!(ctrl & MLXSW_PCI_CIR_CTRL_GO_BIT)) {
1612 *p_wait_done = true;
1613 *p_status = ctrl >> MLXSW_PCI_CIR_CTRL_STATUS_SHIFT;
1617 } while (time_before(jiffies, end));
1619 wait_event_timeout(mlxsw_pci->cmd.wait, *p_wait_done, timeout);
1620 *p_status = mlxsw_pci->cmd.comp.status;
1631 if (!err && out_mbox && out_mbox_direct) {
1632 /* Some commands don't use output param as address to mailbox
1633 * but they store output directly into registers. In that case,
1634 * copy registers into mbox buffer.
1639 tmp = cpu_to_be32(mlxsw_pci_read32(mlxsw_pci,
1641 memcpy(out_mbox, &tmp, sizeof(tmp));
1642 tmp = cpu_to_be32(mlxsw_pci_read32(mlxsw_pci,
1644 memcpy(out_mbox + sizeof(tmp), &tmp, sizeof(tmp));
1646 } else if (!err && out_mbox)
1647 memcpy(out_mbox, mlxsw_pci->cmd.out_mbox.buf, out_mbox_size);
1649 mutex_unlock(&mlxsw_pci->cmd.lock);
1654 static const struct mlxsw_bus mlxsw_pci_bus = {
1656 .init = mlxsw_pci_init,
1657 .fini = mlxsw_pci_fini,
1658 .skb_transmit_busy = mlxsw_pci_skb_transmit_busy,
1659 .skb_transmit = mlxsw_pci_skb_transmit,
1660 .cmd_exec = mlxsw_pci_cmd_exec,
1663 static int mlxsw_pci_sw_reset(struct mlxsw_pci *mlxsw_pci)
1665 mlxsw_pci_write32(mlxsw_pci, SW_RESET, MLXSW_PCI_SW_RESET_RST_BIT);
1666 /* Current firware does not let us know when the reset is done.
1667 * So we just wait here for constant time and hope for the best.
1669 msleep(MLXSW_PCI_SW_RESET_TIMEOUT_MSECS);
1673 static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1675 struct mlxsw_pci *mlxsw_pci;
1678 mlxsw_pci = kzalloc(sizeof(*mlxsw_pci), GFP_KERNEL);
1682 err = pci_enable_device(pdev);
1684 dev_err(&pdev->dev, "pci_enable_device failed\n");
1685 goto err_pci_enable_device;
1688 err = pci_request_regions(pdev, mlxsw_pci_driver_name);
1690 dev_err(&pdev->dev, "pci_request_regions failed\n");
1691 goto err_pci_request_regions;
1694 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
1696 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
1698 dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
1699 goto err_pci_set_dma_mask;
1702 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1704 dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
1705 goto err_pci_set_dma_mask;
1709 if (pci_resource_len(pdev, 0) < MLXSW_PCI_BAR0_SIZE) {
1710 dev_err(&pdev->dev, "invalid PCI region size\n");
1712 goto err_pci_resource_len_check;
1715 mlxsw_pci->hw_addr = ioremap(pci_resource_start(pdev, 0),
1716 pci_resource_len(pdev, 0));
1717 if (!mlxsw_pci->hw_addr) {
1718 dev_err(&pdev->dev, "ioremap failed\n");
1722 pci_set_master(pdev);
1724 mlxsw_pci->pdev = pdev;
1725 pci_set_drvdata(pdev, mlxsw_pci);
1727 err = mlxsw_pci_sw_reset(mlxsw_pci);
1729 dev_err(&pdev->dev, "Software reset failed\n");
1733 err = pci_enable_msix_exact(pdev, &mlxsw_pci->msix_entry, 1);
1735 dev_err(&pdev->dev, "MSI-X init failed\n");
1739 mlxsw_pci->bus_info.device_kind = mlxsw_pci_device_kind_get(id);
1740 mlxsw_pci->bus_info.device_name = pci_name(mlxsw_pci->pdev);
1741 mlxsw_pci->bus_info.dev = &pdev->dev;
1743 mlxsw_pci->dbg_dir = debugfs_create_dir(mlxsw_pci->bus_info.device_name,
1744 mlxsw_pci_dbg_root);
1745 if (!mlxsw_pci->dbg_dir) {
1746 dev_err(&pdev->dev, "Failed to create debugfs dir\n");
1748 goto err_dbg_create_dir;
1751 err = mlxsw_core_bus_device_register(&mlxsw_pci->bus_info,
1752 &mlxsw_pci_bus, mlxsw_pci);
1754 dev_err(&pdev->dev, "cannot register bus device\n");
1755 goto err_bus_device_register;
1760 err_bus_device_register:
1761 debugfs_remove_recursive(mlxsw_pci->dbg_dir);
1763 pci_disable_msix(mlxsw_pci->pdev);
1766 iounmap(mlxsw_pci->hw_addr);
1768 err_pci_resource_len_check:
1769 err_pci_set_dma_mask:
1770 pci_release_regions(pdev);
1771 err_pci_request_regions:
1772 pci_disable_device(pdev);
1773 err_pci_enable_device:
1778 static void mlxsw_pci_remove(struct pci_dev *pdev)
1780 struct mlxsw_pci *mlxsw_pci = pci_get_drvdata(pdev);
1782 mlxsw_core_bus_device_unregister(mlxsw_pci->core);
1783 debugfs_remove_recursive(mlxsw_pci->dbg_dir);
1784 pci_disable_msix(mlxsw_pci->pdev);
1785 iounmap(mlxsw_pci->hw_addr);
1786 pci_release_regions(mlxsw_pci->pdev);
1787 pci_disable_device(mlxsw_pci->pdev);
1791 static struct pci_driver mlxsw_pci_driver = {
1792 .name = mlxsw_pci_driver_name,
1793 .id_table = mlxsw_pci_id_table,
1794 .probe = mlxsw_pci_probe,
1795 .remove = mlxsw_pci_remove,
1798 static int __init mlxsw_pci_module_init(void)
1802 mlxsw_pci_dbg_root = debugfs_create_dir(mlxsw_pci_driver_name, NULL);
1803 if (!mlxsw_pci_dbg_root)
1805 err = pci_register_driver(&mlxsw_pci_driver);
1807 goto err_register_driver;
1810 err_register_driver:
1811 debugfs_remove_recursive(mlxsw_pci_dbg_root);
1815 static void __exit mlxsw_pci_module_exit(void)
1817 pci_unregister_driver(&mlxsw_pci_driver);
1818 debugfs_remove_recursive(mlxsw_pci_dbg_root);
1821 module_init(mlxsw_pci_module_init);
1822 module_exit(mlxsw_pci_module_exit);
1824 MODULE_LICENSE("Dual BSD/GPL");
1825 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
1826 MODULE_DESCRIPTION("Mellanox switch PCI interface driver");
1827 MODULE_DEVICE_TABLE(pci, mlxsw_pci_id_table);