2 * Copyright (C) 2015 Cavium, Inc.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License
6 * as published by the Free Software Foundation.
9 #include <linux/module.h>
10 #include <linux/interrupt.h>
11 #include <linux/pci.h>
12 #include <linux/netdevice.h>
13 #include <linux/if_vlan.h>
14 #include <linux/etherdevice.h>
15 #include <linux/ethtool.h>
16 #include <linux/log2.h>
17 #include <linux/prefetch.h>
18 #include <linux/irq.h>
22 #include "nicvf_queues.h"
23 #include "thunder_bgx.h"
25 #define DRV_NAME "thunder-nicvf"
26 #define DRV_VERSION "1.0"
28 /* Supported devices */
29 static const struct pci_device_id nicvf_id_table
[] = {
30 { PCI_DEVICE_SUB(PCI_VENDOR_ID_CAVIUM
,
31 PCI_DEVICE_ID_THUNDER_NIC_VF
,
32 PCI_VENDOR_ID_CAVIUM
, 0xA134) },
33 { PCI_DEVICE_SUB(PCI_VENDOR_ID_CAVIUM
,
34 PCI_DEVICE_ID_THUNDER_PASS1_NIC_VF
,
35 PCI_VENDOR_ID_CAVIUM
, 0xA11E) },
36 { 0, } /* end of table */
39 MODULE_AUTHOR("Sunil Goutham");
40 MODULE_DESCRIPTION("Cavium Thunder NIC Virtual Function Driver");
41 MODULE_LICENSE("GPL v2");
42 MODULE_VERSION(DRV_VERSION
);
43 MODULE_DEVICE_TABLE(pci
, nicvf_id_table
);
45 static int debug
= 0x00;
46 module_param(debug
, int, 0644);
47 MODULE_PARM_DESC(debug
, "Debug message level bitmap");
49 static int cpi_alg
= CPI_ALG_NONE
;
50 module_param(cpi_alg
, int, S_IRUGO
);
51 MODULE_PARM_DESC(cpi_alg
,
52 "PFC algorithm (0=none, 1=VLAN, 2=VLAN16, 3=IP Diffserv)");
54 static inline u8
nicvf_netdev_qidx(struct nicvf
*nic
, u8 qidx
)
57 return qidx
+ ((nic
->sqs_id
+ 1) * MAX_CMP_QUEUES_PER_QS
);
62 static inline void nicvf_set_rx_frame_cnt(struct nicvf
*nic
,
66 nic
->drv_stats
.rx_frames_64
++;
67 else if (skb
->len
<= 127)
68 nic
->drv_stats
.rx_frames_127
++;
69 else if (skb
->len
<= 255)
70 nic
->drv_stats
.rx_frames_255
++;
71 else if (skb
->len
<= 511)
72 nic
->drv_stats
.rx_frames_511
++;
73 else if (skb
->len
<= 1023)
74 nic
->drv_stats
.rx_frames_1023
++;
75 else if (skb
->len
<= 1518)
76 nic
->drv_stats
.rx_frames_1518
++;
78 nic
->drv_stats
.rx_frames_jumbo
++;
81 /* The Cavium ThunderX network controller can *only* be found in SoCs
82 * containing the ThunderX ARM64 CPU implementation. All accesses to the device
83 * registers on this platform are implicitly strongly ordered with respect
84 * to memory accesses. So writeq_relaxed() and readq_relaxed() are safe to use
85 * with no memory barriers in this driver. The readq()/writeq() functions add
86 * explicit ordering operation which in this case are redundant, and only
90 /* Register read/write APIs */
91 void nicvf_reg_write(struct nicvf
*nic
, u64 offset
, u64 val
)
93 writeq_relaxed(val
, nic
->reg_base
+ offset
);
96 u64
nicvf_reg_read(struct nicvf
*nic
, u64 offset
)
98 return readq_relaxed(nic
->reg_base
+ offset
);
101 void nicvf_queue_reg_write(struct nicvf
*nic
, u64 offset
,
104 void __iomem
*addr
= nic
->reg_base
+ offset
;
106 writeq_relaxed(val
, addr
+ (qidx
<< NIC_Q_NUM_SHIFT
));
109 u64
nicvf_queue_reg_read(struct nicvf
*nic
, u64 offset
, u64 qidx
)
111 void __iomem
*addr
= nic
->reg_base
+ offset
;
113 return readq_relaxed(addr
+ (qidx
<< NIC_Q_NUM_SHIFT
));
116 /* VF -> PF mailbox communication */
117 static void nicvf_write_to_mbx(struct nicvf
*nic
, union nic_mbx
*mbx
)
119 u64
*msg
= (u64
*)mbx
;
121 nicvf_reg_write(nic
, NIC_VF_PF_MAILBOX_0_1
+ 0, msg
[0]);
122 nicvf_reg_write(nic
, NIC_VF_PF_MAILBOX_0_1
+ 8, msg
[1]);
125 int nicvf_send_msg_to_pf(struct nicvf
*nic
, union nic_mbx
*mbx
)
127 int timeout
= NIC_MBOX_MSG_TIMEOUT
;
130 nic
->pf_acked
= false;
131 nic
->pf_nacked
= false;
133 nicvf_write_to_mbx(nic
, mbx
);
135 /* Wait for previous message to be acked, timeout 2sec */
136 while (!nic
->pf_acked
) {
144 netdev_err(nic
->netdev
,
145 "PF didn't ack to mbox msg %d from VF%d\n",
146 (mbx
->msg
.msg
& 0xFF), nic
->vf_id
);
153 /* Checks if VF is able to comminicate with PF
154 * and also gets the VNIC number this VF is associated to.
156 static int nicvf_check_pf_ready(struct nicvf
*nic
)
158 union nic_mbx mbx
= {};
160 mbx
.msg
.msg
= NIC_MBOX_MSG_READY
;
161 if (nicvf_send_msg_to_pf(nic
, &mbx
)) {
162 netdev_err(nic
->netdev
,
163 "PF didn't respond to READY msg\n");
170 static void nicvf_read_bgx_stats(struct nicvf
*nic
, struct bgx_stats_msg
*bgx
)
173 nic
->bgx_stats
.rx_stats
[bgx
->idx
] = bgx
->stats
;
175 nic
->bgx_stats
.tx_stats
[bgx
->idx
] = bgx
->stats
;
178 static void nicvf_handle_mbx_intr(struct nicvf
*nic
)
180 union nic_mbx mbx
= {};
185 mbx_addr
= NIC_VF_PF_MAILBOX_0_1
;
186 mbx_data
= (u64
*)&mbx
;
188 for (i
= 0; i
< NIC_PF_VF_MAILBOX_SIZE
; i
++) {
189 *mbx_data
= nicvf_reg_read(nic
, mbx_addr
);
191 mbx_addr
+= sizeof(u64
);
194 netdev_dbg(nic
->netdev
, "Mbox message: msg: 0x%x\n", mbx
.msg
.msg
);
195 switch (mbx
.msg
.msg
) {
196 case NIC_MBOX_MSG_READY
:
197 nic
->pf_acked
= true;
198 nic
->vf_id
= mbx
.nic_cfg
.vf_id
& 0x7F;
199 nic
->tns_mode
= mbx
.nic_cfg
.tns_mode
& 0x7F;
200 nic
->node
= mbx
.nic_cfg
.node_id
;
201 if (!nic
->set_mac_pending
)
202 ether_addr_copy(nic
->netdev
->dev_addr
,
203 mbx
.nic_cfg
.mac_addr
);
204 nic
->sqs_mode
= mbx
.nic_cfg
.sqs_mode
;
205 nic
->loopback_supported
= mbx
.nic_cfg
.loopback_supported
;
206 nic
->link_up
= false;
210 case NIC_MBOX_MSG_ACK
:
211 nic
->pf_acked
= true;
213 case NIC_MBOX_MSG_NACK
:
214 nic
->pf_nacked
= true;
216 case NIC_MBOX_MSG_RSS_SIZE
:
217 nic
->rss_info
.rss_size
= mbx
.rss_size
.ind_tbl_size
;
218 nic
->pf_acked
= true;
220 case NIC_MBOX_MSG_BGX_STATS
:
221 nicvf_read_bgx_stats(nic
, &mbx
.bgx_stats
);
222 nic
->pf_acked
= true;
224 case NIC_MBOX_MSG_BGX_LINK_CHANGE
:
225 nic
->pf_acked
= true;
226 nic
->link_up
= mbx
.link_status
.link_up
;
227 nic
->duplex
= mbx
.link_status
.duplex
;
228 nic
->speed
= mbx
.link_status
.speed
;
230 netdev_info(nic
->netdev
, "%s: Link is Up %d Mbps %s\n",
231 nic
->netdev
->name
, nic
->speed
,
232 nic
->duplex
== DUPLEX_FULL
?
233 "Full duplex" : "Half duplex");
234 netif_carrier_on(nic
->netdev
);
235 netif_tx_start_all_queues(nic
->netdev
);
237 netdev_info(nic
->netdev
, "%s: Link is Down\n",
239 netif_carrier_off(nic
->netdev
);
240 netif_tx_stop_all_queues(nic
->netdev
);
243 case NIC_MBOX_MSG_ALLOC_SQS
:
244 nic
->sqs_count
= mbx
.sqs_alloc
.qs_count
;
245 nic
->pf_acked
= true;
247 case NIC_MBOX_MSG_SNICVF_PTR
:
248 /* Primary VF: make note of secondary VF's pointer
249 * to be used while packet transmission.
251 nic
->snicvf
[mbx
.nicvf
.sqs_id
] =
252 (struct nicvf
*)mbx
.nicvf
.nicvf
;
253 nic
->pf_acked
= true;
255 case NIC_MBOX_MSG_PNICVF_PTR
:
256 /* Secondary VF/Qset: make note of primary VF's pointer
257 * to be used while packet reception, to handover packet
258 * to primary VF's netdev.
260 nic
->pnicvf
= (struct nicvf
*)mbx
.nicvf
.nicvf
;
261 nic
->pf_acked
= true;
264 netdev_err(nic
->netdev
,
265 "Invalid message from PF, msg 0x%x\n", mbx
.msg
.msg
);
268 nicvf_clear_intr(nic
, NICVF_INTR_MBOX
, 0);
271 static int nicvf_hw_set_mac_addr(struct nicvf
*nic
, struct net_device
*netdev
)
273 union nic_mbx mbx
= {};
275 mbx
.mac
.msg
= NIC_MBOX_MSG_SET_MAC
;
276 mbx
.mac
.vf_id
= nic
->vf_id
;
277 ether_addr_copy(mbx
.mac
.mac_addr
, netdev
->dev_addr
);
279 return nicvf_send_msg_to_pf(nic
, &mbx
);
282 static void nicvf_config_cpi(struct nicvf
*nic
)
284 union nic_mbx mbx
= {};
286 mbx
.cpi_cfg
.msg
= NIC_MBOX_MSG_CPI_CFG
;
287 mbx
.cpi_cfg
.vf_id
= nic
->vf_id
;
288 mbx
.cpi_cfg
.cpi_alg
= nic
->cpi_alg
;
289 mbx
.cpi_cfg
.rq_cnt
= nic
->qs
->rq_cnt
;
291 nicvf_send_msg_to_pf(nic
, &mbx
);
294 static void nicvf_get_rss_size(struct nicvf
*nic
)
296 union nic_mbx mbx
= {};
298 mbx
.rss_size
.msg
= NIC_MBOX_MSG_RSS_SIZE
;
299 mbx
.rss_size
.vf_id
= nic
->vf_id
;
300 nicvf_send_msg_to_pf(nic
, &mbx
);
303 void nicvf_config_rss(struct nicvf
*nic
)
305 union nic_mbx mbx
= {};
306 struct nicvf_rss_info
*rss
= &nic
->rss_info
;
307 int ind_tbl_len
= rss
->rss_size
;
310 mbx
.rss_cfg
.vf_id
= nic
->vf_id
;
311 mbx
.rss_cfg
.hash_bits
= rss
->hash_bits
;
312 while (ind_tbl_len
) {
313 mbx
.rss_cfg
.tbl_offset
= nextq
;
314 mbx
.rss_cfg
.tbl_len
= min(ind_tbl_len
,
315 RSS_IND_TBL_LEN_PER_MBX_MSG
);
316 mbx
.rss_cfg
.msg
= mbx
.rss_cfg
.tbl_offset
?
317 NIC_MBOX_MSG_RSS_CFG_CONT
: NIC_MBOX_MSG_RSS_CFG
;
319 for (i
= 0; i
< mbx
.rss_cfg
.tbl_len
; i
++)
320 mbx
.rss_cfg
.ind_tbl
[i
] = rss
->ind_tbl
[nextq
++];
322 nicvf_send_msg_to_pf(nic
, &mbx
);
324 ind_tbl_len
-= mbx
.rss_cfg
.tbl_len
;
328 void nicvf_set_rss_key(struct nicvf
*nic
)
330 struct nicvf_rss_info
*rss
= &nic
->rss_info
;
331 u64 key_addr
= NIC_VNIC_RSS_KEY_0_4
;
334 for (idx
= 0; idx
< RSS_HASH_KEY_SIZE
; idx
++) {
335 nicvf_reg_write(nic
, key_addr
, rss
->key
[idx
]);
336 key_addr
+= sizeof(u64
);
340 static int nicvf_rss_init(struct nicvf
*nic
)
342 struct nicvf_rss_info
*rss
= &nic
->rss_info
;
345 nicvf_get_rss_size(nic
);
347 if (cpi_alg
!= CPI_ALG_NONE
) {
355 /* Using the HW reset value for now */
356 rss
->key
[0] = 0xFEED0BADFEED0BADULL
;
357 rss
->key
[1] = 0xFEED0BADFEED0BADULL
;
358 rss
->key
[2] = 0xFEED0BADFEED0BADULL
;
359 rss
->key
[3] = 0xFEED0BADFEED0BADULL
;
360 rss
->key
[4] = 0xFEED0BADFEED0BADULL
;
362 nicvf_set_rss_key(nic
);
364 rss
->cfg
= RSS_IP_HASH_ENA
| RSS_TCP_HASH_ENA
| RSS_UDP_HASH_ENA
;
365 nicvf_reg_write(nic
, NIC_VNIC_RSS_CFG
, rss
->cfg
);
367 rss
->hash_bits
= ilog2(rounddown_pow_of_two(rss
->rss_size
));
369 for (idx
= 0; idx
< rss
->rss_size
; idx
++)
370 rss
->ind_tbl
[idx
] = ethtool_rxfh_indir_default(idx
,
372 nicvf_config_rss(nic
);
376 /* Request PF to allocate additional Qsets */
377 static void nicvf_request_sqs(struct nicvf
*nic
)
379 union nic_mbx mbx
= {};
381 int sqs_count
= nic
->sqs_count
;
382 int rx_queues
= 0, tx_queues
= 0;
384 /* Only primary VF should request */
385 if (nic
->sqs_mode
|| !nic
->sqs_count
)
388 mbx
.sqs_alloc
.msg
= NIC_MBOX_MSG_ALLOC_SQS
;
389 mbx
.sqs_alloc
.vf_id
= nic
->vf_id
;
390 mbx
.sqs_alloc
.qs_count
= nic
->sqs_count
;
391 if (nicvf_send_msg_to_pf(nic
, &mbx
)) {
392 /* No response from PF */
397 /* Return if no Secondary Qsets available */
401 if (nic
->rx_queues
> MAX_RCV_QUEUES_PER_QS
)
402 rx_queues
= nic
->rx_queues
- MAX_RCV_QUEUES_PER_QS
;
403 if (nic
->tx_queues
> MAX_SND_QUEUES_PER_QS
)
404 tx_queues
= nic
->tx_queues
- MAX_SND_QUEUES_PER_QS
;
406 /* Set no of Rx/Tx queues in each of the SQsets */
407 for (sqs
= 0; sqs
< nic
->sqs_count
; sqs
++) {
408 mbx
.nicvf
.msg
= NIC_MBOX_MSG_SNICVF_PTR
;
409 mbx
.nicvf
.vf_id
= nic
->vf_id
;
410 mbx
.nicvf
.sqs_id
= sqs
;
411 nicvf_send_msg_to_pf(nic
, &mbx
);
413 nic
->snicvf
[sqs
]->sqs_id
= sqs
;
414 if (rx_queues
> MAX_RCV_QUEUES_PER_QS
) {
415 nic
->snicvf
[sqs
]->qs
->rq_cnt
= MAX_RCV_QUEUES_PER_QS
;
416 rx_queues
-= MAX_RCV_QUEUES_PER_QS
;
418 nic
->snicvf
[sqs
]->qs
->rq_cnt
= rx_queues
;
422 if (tx_queues
> MAX_SND_QUEUES_PER_QS
) {
423 nic
->snicvf
[sqs
]->qs
->sq_cnt
= MAX_SND_QUEUES_PER_QS
;
424 tx_queues
-= MAX_SND_QUEUES_PER_QS
;
426 nic
->snicvf
[sqs
]->qs
->sq_cnt
= tx_queues
;
430 nic
->snicvf
[sqs
]->qs
->cq_cnt
=
431 max(nic
->snicvf
[sqs
]->qs
->rq_cnt
, nic
->snicvf
[sqs
]->qs
->sq_cnt
);
433 /* Initialize secondary Qset's queues and its interrupts */
434 nicvf_open(nic
->snicvf
[sqs
]->netdev
);
437 /* Update stack with actual Rx/Tx queue count allocated */
438 if (sqs_count
!= nic
->sqs_count
)
439 nicvf_set_real_num_queues(nic
->netdev
,
440 nic
->tx_queues
, nic
->rx_queues
);
443 /* Send this Qset's nicvf pointer to PF.
444 * PF inturn sends primary VF's nicvf struct to secondary Qsets/VFs
445 * so that packets received by these Qsets can use primary VF's netdev
447 static void nicvf_send_vf_struct(struct nicvf
*nic
)
449 union nic_mbx mbx
= {};
451 mbx
.nicvf
.msg
= NIC_MBOX_MSG_NICVF_PTR
;
452 mbx
.nicvf
.sqs_mode
= nic
->sqs_mode
;
453 mbx
.nicvf
.nicvf
= (u64
)nic
;
454 nicvf_send_msg_to_pf(nic
, &mbx
);
457 static void nicvf_get_primary_vf_struct(struct nicvf
*nic
)
459 union nic_mbx mbx
= {};
461 mbx
.nicvf
.msg
= NIC_MBOX_MSG_PNICVF_PTR
;
462 nicvf_send_msg_to_pf(nic
, &mbx
);
465 int nicvf_set_real_num_queues(struct net_device
*netdev
,
466 int tx_queues
, int rx_queues
)
470 err
= netif_set_real_num_tx_queues(netdev
, tx_queues
);
473 "Failed to set no of Tx queues: %d\n", tx_queues
);
477 err
= netif_set_real_num_rx_queues(netdev
, rx_queues
);
480 "Failed to set no of Rx queues: %d\n", rx_queues
);
484 static int nicvf_init_resources(struct nicvf
*nic
)
487 union nic_mbx mbx
= {};
489 mbx
.msg
.msg
= NIC_MBOX_MSG_CFG_DONE
;
492 nicvf_qset_config(nic
, true);
494 /* Initialize queues and HW for data transfer */
495 err
= nicvf_config_data_transfer(nic
, true);
497 netdev_err(nic
->netdev
,
498 "Failed to alloc/config VF's QSet resources\n");
502 /* Send VF config done msg to PF */
503 nicvf_write_to_mbx(nic
, &mbx
);
508 static void nicvf_snd_pkt_handler(struct net_device
*netdev
,
509 struct cmp_queue
*cq
,
510 struct cqe_send_t
*cqe_tx
, int cqe_type
)
512 struct sk_buff
*skb
= NULL
;
513 struct nicvf
*nic
= netdev_priv(netdev
);
514 struct snd_queue
*sq
;
515 struct sq_hdr_subdesc
*hdr
;
517 sq
= &nic
->qs
->sq
[cqe_tx
->sq_idx
];
519 hdr
= (struct sq_hdr_subdesc
*)GET_SQ_DESC(sq
, cqe_tx
->sqe_ptr
);
520 if (hdr
->subdesc_type
!= SQ_DESC_TYPE_HEADER
)
523 netdev_dbg(nic
->netdev
,
524 "%s Qset #%d SQ #%d SQ ptr #%d subdesc count %d\n",
525 __func__
, cqe_tx
->sq_qs
, cqe_tx
->sq_idx
,
526 cqe_tx
->sqe_ptr
, hdr
->subdesc_cnt
);
528 nicvf_put_sq_desc(sq
, hdr
->subdesc_cnt
+ 1);
529 nicvf_check_cqe_tx_errs(nic
, cq
, cqe_tx
);
530 skb
= (struct sk_buff
*)sq
->skbuff
[cqe_tx
->sqe_ptr
];
531 /* For TSO offloaded packets only one head SKB needs to be freed */
534 dev_consume_skb_any(skb
);
535 sq
->skbuff
[cqe_tx
->sqe_ptr
] = (u64
)NULL
;
539 static inline void nicvf_set_rxhash(struct net_device
*netdev
,
540 struct cqe_rx_t
*cqe_rx
,
546 if (!(netdev
->features
& NETIF_F_RXHASH
))
549 switch (cqe_rx
->rss_alg
) {
552 hash_type
= PKT_HASH_TYPE_L4
;
553 hash
= cqe_rx
->rss_tag
;
556 hash_type
= PKT_HASH_TYPE_L3
;
557 hash
= cqe_rx
->rss_tag
;
560 hash_type
= PKT_HASH_TYPE_NONE
;
564 skb_set_hash(skb
, hash
, hash_type
);
567 static void nicvf_rcv_pkt_handler(struct net_device
*netdev
,
568 struct napi_struct
*napi
,
569 struct cmp_queue
*cq
,
570 struct cqe_rx_t
*cqe_rx
, int cqe_type
)
573 struct nicvf
*nic
= netdev_priv(netdev
);
577 rq_idx
= nicvf_netdev_qidx(nic
, cqe_rx
->rq_idx
);
580 /* Use primary VF's 'nicvf' struct */
582 netdev
= nic
->netdev
;
585 /* Check for errors */
586 err
= nicvf_check_cqe_rx_errs(nic
, cq
, cqe_rx
);
587 if (err
&& !cqe_rx
->rb_cnt
)
590 skb
= nicvf_get_rcv_skb(nic
, cqe_rx
);
592 netdev_dbg(nic
->netdev
, "Packet not received\n");
596 if (netif_msg_pktdata(nic
)) {
597 netdev_info(nic
->netdev
, "%s: skb 0x%p, len=%d\n", netdev
->name
,
599 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_OFFSET
, 16, 1,
600 skb
->data
, skb
->len
, true);
603 /* If error packet, drop it here */
605 dev_kfree_skb_any(skb
);
609 nicvf_set_rx_frame_cnt(nic
, skb
);
611 nicvf_set_rxhash(netdev
, cqe_rx
, skb
);
613 skb_record_rx_queue(skb
, rq_idx
);
614 if (netdev
->hw_features
& NETIF_F_RXCSUM
) {
615 /* HW by default verifies TCP/UDP/SCTP checksums */
616 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
618 skb_checksum_none_assert(skb
);
621 skb
->protocol
= eth_type_trans(skb
, netdev
);
623 /* Check for stripped VLAN */
624 if (cqe_rx
->vlan_found
&& cqe_rx
->vlan_stripped
)
625 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
),
626 ntohs((__force __be16
)cqe_rx
->vlan_tci
));
628 if (napi
&& (netdev
->features
& NETIF_F_GRO
))
629 napi_gro_receive(napi
, skb
);
631 netif_receive_skb(skb
);
634 static int nicvf_cq_intr_handler(struct net_device
*netdev
, u8 cq_idx
,
635 struct napi_struct
*napi
, int budget
)
637 int processed_cqe
, work_done
= 0, tx_done
= 0;
638 int cqe_count
, cqe_head
;
639 struct nicvf
*nic
= netdev_priv(netdev
);
640 struct queue_set
*qs
= nic
->qs
;
641 struct cmp_queue
*cq
= &qs
->cq
[cq_idx
];
642 struct cqe_rx_t
*cq_desc
;
643 struct netdev_queue
*txq
;
645 spin_lock_bh(&cq
->lock
);
648 /* Get no of valid CQ entries to process */
649 cqe_count
= nicvf_queue_reg_read(nic
, NIC_QSET_CQ_0_7_STATUS
, cq_idx
);
650 cqe_count
&= CQ_CQE_COUNT
;
654 /* Get head of the valid CQ entries */
655 cqe_head
= nicvf_queue_reg_read(nic
, NIC_QSET_CQ_0_7_HEAD
, cq_idx
) >> 9;
658 netdev_dbg(nic
->netdev
, "%s CQ%d cqe_count %d cqe_head %d\n",
659 __func__
, cq_idx
, cqe_count
, cqe_head
);
660 while (processed_cqe
< cqe_count
) {
661 /* Get the CQ descriptor */
662 cq_desc
= (struct cqe_rx_t
*)GET_CQ_DESC(cq
, cqe_head
);
664 cqe_head
&= (cq
->dmem
.q_len
- 1);
665 /* Initiate prefetch for next descriptor */
666 prefetch((struct cqe_rx_t
*)GET_CQ_DESC(cq
, cqe_head
));
668 if ((work_done
>= budget
) && napi
&&
669 (cq_desc
->cqe_type
!= CQE_TYPE_SEND
)) {
673 netdev_dbg(nic
->netdev
, "CQ%d cq_desc->cqe_type %d\n",
674 cq_idx
, cq_desc
->cqe_type
);
675 switch (cq_desc
->cqe_type
) {
677 nicvf_rcv_pkt_handler(netdev
, napi
, cq
,
678 cq_desc
, CQE_TYPE_RX
);
682 nicvf_snd_pkt_handler(netdev
, cq
,
683 (void *)cq_desc
, CQE_TYPE_SEND
);
686 case CQE_TYPE_INVALID
:
687 case CQE_TYPE_RX_SPLIT
:
688 case CQE_TYPE_RX_TCP
:
689 case CQE_TYPE_SEND_PTP
:
695 netdev_dbg(nic
->netdev
,
696 "%s CQ%d processed_cqe %d work_done %d budget %d\n",
697 __func__
, cq_idx
, processed_cqe
, work_done
, budget
);
699 /* Ring doorbell to inform H/W to reuse processed CQEs */
700 nicvf_queue_reg_write(nic
, NIC_QSET_CQ_0_7_DOOR
,
701 cq_idx
, processed_cqe
);
703 if ((work_done
< budget
) && napi
)
707 /* Wakeup TXQ if its stopped earlier due to SQ full */
709 netdev
= nic
->pnicvf
->netdev
;
710 txq
= netdev_get_tx_queue(netdev
,
711 nicvf_netdev_qidx(nic
, cq_idx
));
713 if (netif_tx_queue_stopped(txq
) && netif_carrier_ok(netdev
)) {
714 netif_tx_start_queue(txq
);
715 nic
->drv_stats
.txq_wake
++;
716 if (netif_msg_tx_err(nic
))
718 "%s: Transmit queue wakeup SQ%d\n",
719 netdev
->name
, cq_idx
);
723 spin_unlock_bh(&cq
->lock
);
727 static int nicvf_poll(struct napi_struct
*napi
, int budget
)
731 struct net_device
*netdev
= napi
->dev
;
732 struct nicvf
*nic
= netdev_priv(netdev
);
733 struct nicvf_cq_poll
*cq
;
735 cq
= container_of(napi
, struct nicvf_cq_poll
, napi
);
736 work_done
= nicvf_cq_intr_handler(netdev
, cq
->cq_idx
, napi
, budget
);
738 if (work_done
< budget
) {
739 /* Slow packet rate, exit polling */
741 /* Re-enable interrupts */
742 cq_head
= nicvf_queue_reg_read(nic
, NIC_QSET_CQ_0_7_HEAD
,
744 nicvf_clear_intr(nic
, NICVF_INTR_CQ
, cq
->cq_idx
);
745 nicvf_queue_reg_write(nic
, NIC_QSET_CQ_0_7_HEAD
,
746 cq
->cq_idx
, cq_head
);
747 nicvf_enable_intr(nic
, NICVF_INTR_CQ
, cq
->cq_idx
);
752 /* Qset error interrupt handler
754 * As of now only CQ errors are handled
756 static void nicvf_handle_qs_err(unsigned long data
)
758 struct nicvf
*nic
= (struct nicvf
*)data
;
759 struct queue_set
*qs
= nic
->qs
;
763 netif_tx_disable(nic
->netdev
);
765 /* Check if it is CQ err */
766 for (qidx
= 0; qidx
< qs
->cq_cnt
; qidx
++) {
767 status
= nicvf_queue_reg_read(nic
, NIC_QSET_CQ_0_7_STATUS
,
769 if (!(status
& CQ_ERR_MASK
))
771 /* Process already queued CQEs and reconfig CQ */
772 nicvf_disable_intr(nic
, NICVF_INTR_CQ
, qidx
);
773 nicvf_sq_disable(nic
, qidx
);
774 nicvf_cq_intr_handler(nic
->netdev
, qidx
, NULL
, 0);
775 nicvf_cmp_queue_config(nic
, qs
, qidx
, true);
776 nicvf_sq_free_used_descs(nic
->netdev
, &qs
->sq
[qidx
], qidx
);
777 nicvf_sq_enable(nic
, &qs
->sq
[qidx
], qidx
);
779 nicvf_enable_intr(nic
, NICVF_INTR_CQ
, qidx
);
782 netif_tx_start_all_queues(nic
->netdev
);
783 /* Re-enable Qset error interrupt */
784 nicvf_enable_intr(nic
, NICVF_INTR_QS_ERR
, 0);
787 static void nicvf_dump_intr_status(struct nicvf
*nic
)
789 if (netif_msg_intr(nic
))
790 netdev_info(nic
->netdev
, "%s: interrupt status 0x%llx\n",
791 nic
->netdev
->name
, nicvf_reg_read(nic
, NIC_VF_INT
));
794 static irqreturn_t
nicvf_misc_intr_handler(int irq
, void *nicvf_irq
)
796 struct nicvf
*nic
= (struct nicvf
*)nicvf_irq
;
799 nicvf_dump_intr_status(nic
);
801 intr
= nicvf_reg_read(nic
, NIC_VF_INT
);
802 /* Check for spurious interrupt */
803 if (!(intr
& NICVF_INTR_MBOX_MASK
))
806 nicvf_handle_mbx_intr(nic
);
811 static irqreturn_t
nicvf_intr_handler(int irq
, void *cq_irq
)
813 struct nicvf_cq_poll
*cq_poll
= (struct nicvf_cq_poll
*)cq_irq
;
814 struct nicvf
*nic
= cq_poll
->nicvf
;
815 int qidx
= cq_poll
->cq_idx
;
817 nicvf_dump_intr_status(nic
);
819 /* Disable interrupts */
820 nicvf_disable_intr(nic
, NICVF_INTR_CQ
, qidx
);
823 napi_schedule(&cq_poll
->napi
);
825 /* Clear interrupt */
826 nicvf_clear_intr(nic
, NICVF_INTR_CQ
, qidx
);
831 static irqreturn_t
nicvf_rbdr_intr_handler(int irq
, void *nicvf_irq
)
833 struct nicvf
*nic
= (struct nicvf
*)nicvf_irq
;
837 nicvf_dump_intr_status(nic
);
839 /* Disable RBDR interrupt and schedule softirq */
840 for (qidx
= 0; qidx
< nic
->qs
->rbdr_cnt
; qidx
++) {
841 if (!nicvf_is_intr_enabled(nic
, NICVF_INTR_RBDR
, qidx
))
843 nicvf_disable_intr(nic
, NICVF_INTR_RBDR
, qidx
);
844 tasklet_hi_schedule(&nic
->rbdr_task
);
845 /* Clear interrupt */
846 nicvf_clear_intr(nic
, NICVF_INTR_RBDR
, qidx
);
852 static irqreturn_t
nicvf_qs_err_intr_handler(int irq
, void *nicvf_irq
)
854 struct nicvf
*nic
= (struct nicvf
*)nicvf_irq
;
856 nicvf_dump_intr_status(nic
);
858 /* Disable Qset err interrupt and schedule softirq */
859 nicvf_disable_intr(nic
, NICVF_INTR_QS_ERR
, 0);
860 tasklet_hi_schedule(&nic
->qs_err_task
);
861 nicvf_clear_intr(nic
, NICVF_INTR_QS_ERR
, 0);
866 static int nicvf_enable_msix(struct nicvf
*nic
)
870 nic
->num_vec
= NIC_VF_MSIX_VECTORS
;
872 for (vec
= 0; vec
< nic
->num_vec
; vec
++)
873 nic
->msix_entries
[vec
].entry
= vec
;
875 ret
= pci_enable_msix(nic
->pdev
, nic
->msix_entries
, nic
->num_vec
);
877 netdev_err(nic
->netdev
,
878 "Req for #%d msix vectors failed\n", nic
->num_vec
);
881 nic
->msix_enabled
= 1;
885 static void nicvf_disable_msix(struct nicvf
*nic
)
887 if (nic
->msix_enabled
) {
888 pci_disable_msix(nic
->pdev
);
889 nic
->msix_enabled
= 0;
894 static int nicvf_register_interrupts(struct nicvf
*nic
)
900 sprintf(nic
->irq_name
[irq
], "NICVF%d CQ%d",
904 sprintf(nic
->irq_name
[irq
], "NICVF%d SQ%d",
905 nic
->vf_id
, irq
- NICVF_INTR_ID_SQ
);
907 for_each_rbdr_irq(irq
)
908 sprintf(nic
->irq_name
[irq
], "NICVF%d RBDR%d",
909 nic
->vf_id
, irq
- NICVF_INTR_ID_RBDR
);
911 /* Register CQ interrupts */
912 for (irq
= 0; irq
< nic
->qs
->cq_cnt
; irq
++) {
913 vector
= nic
->msix_entries
[irq
].vector
;
914 ret
= request_irq(vector
, nicvf_intr_handler
,
915 0, nic
->irq_name
[irq
], nic
->napi
[irq
]);
918 nic
->irq_allocated
[irq
] = true;
921 /* Register RBDR interrupt */
922 for (irq
= NICVF_INTR_ID_RBDR
;
923 irq
< (NICVF_INTR_ID_RBDR
+ nic
->qs
->rbdr_cnt
); irq
++) {
924 vector
= nic
->msix_entries
[irq
].vector
;
925 ret
= request_irq(vector
, nicvf_rbdr_intr_handler
,
926 0, nic
->irq_name
[irq
], nic
);
929 nic
->irq_allocated
[irq
] = true;
932 /* Register QS error interrupt */
933 sprintf(nic
->irq_name
[NICVF_INTR_ID_QS_ERR
],
934 "NICVF%d Qset error", nic
->vf_id
);
935 irq
= NICVF_INTR_ID_QS_ERR
;
936 ret
= request_irq(nic
->msix_entries
[irq
].vector
,
937 nicvf_qs_err_intr_handler
,
938 0, nic
->irq_name
[irq
], nic
);
940 nic
->irq_allocated
[irq
] = true;
944 netdev_err(nic
->netdev
, "request_irq failed, vector %d\n", irq
);
949 static void nicvf_unregister_interrupts(struct nicvf
*nic
)
953 /* Free registered interrupts */
954 for (irq
= 0; irq
< nic
->num_vec
; irq
++) {
955 if (!nic
->irq_allocated
[irq
])
958 if (irq
< NICVF_INTR_ID_SQ
)
959 free_irq(nic
->msix_entries
[irq
].vector
, nic
->napi
[irq
]);
961 free_irq(nic
->msix_entries
[irq
].vector
, nic
);
963 nic
->irq_allocated
[irq
] = false;
967 nicvf_disable_msix(nic
);
970 /* Initialize MSIX vectors and register MISC interrupt.
971 * Send READY message to PF to check if its alive
973 static int nicvf_register_misc_interrupt(struct nicvf
*nic
)
976 int irq
= NICVF_INTR_ID_MISC
;
978 /* Return if mailbox interrupt is already registered */
979 if (nic
->msix_enabled
)
983 if (!nicvf_enable_msix(nic
))
986 sprintf(nic
->irq_name
[irq
], "%s Mbox", "NICVF");
987 /* Register Misc interrupt */
988 ret
= request_irq(nic
->msix_entries
[irq
].vector
,
989 nicvf_misc_intr_handler
, 0, nic
->irq_name
[irq
], nic
);
993 nic
->irq_allocated
[irq
] = true;
995 /* Enable mailbox interrupt */
996 nicvf_enable_intr(nic
, NICVF_INTR_MBOX
, 0);
998 /* Check if VF is able to communicate with PF */
999 if (!nicvf_check_pf_ready(nic
)) {
1000 nicvf_disable_intr(nic
, NICVF_INTR_MBOX
, 0);
1001 nicvf_unregister_interrupts(nic
);
1008 static netdev_tx_t
nicvf_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
1010 struct nicvf
*nic
= netdev_priv(netdev
);
1011 int qid
= skb_get_queue_mapping(skb
);
1012 struct netdev_queue
*txq
= netdev_get_tx_queue(netdev
, qid
);
1014 /* Check for minimum packet length */
1015 if (skb
->len
<= ETH_HLEN
) {
1017 return NETDEV_TX_OK
;
1020 if (!netif_tx_queue_stopped(txq
) && !nicvf_sq_append_skb(nic
, skb
)) {
1021 netif_tx_stop_queue(txq
);
1022 nic
->drv_stats
.txq_stop
++;
1023 if (netif_msg_tx_err(nic
))
1025 "%s: Transmit ring full, stopping SQ%d\n",
1027 return NETDEV_TX_BUSY
;
1030 return NETDEV_TX_OK
;
1033 static inline void nicvf_free_cq_poll(struct nicvf
*nic
)
1035 struct nicvf_cq_poll
*cq_poll
;
1038 for (qidx
= 0; qidx
< nic
->qs
->cq_cnt
; qidx
++) {
1039 cq_poll
= nic
->napi
[qidx
];
1042 nic
->napi
[qidx
] = NULL
;
1047 int nicvf_stop(struct net_device
*netdev
)
1050 struct nicvf
*nic
= netdev_priv(netdev
);
1051 struct queue_set
*qs
= nic
->qs
;
1052 struct nicvf_cq_poll
*cq_poll
= NULL
;
1053 union nic_mbx mbx
= {};
1055 mbx
.msg
.msg
= NIC_MBOX_MSG_SHUTDOWN
;
1056 nicvf_send_msg_to_pf(nic
, &mbx
);
1058 netif_carrier_off(netdev
);
1059 netif_tx_stop_all_queues(nic
->netdev
);
1061 /* Teardown secondary qsets first */
1062 if (!nic
->sqs_mode
) {
1063 for (qidx
= 0; qidx
< nic
->sqs_count
; qidx
++) {
1064 if (!nic
->snicvf
[qidx
])
1066 nicvf_stop(nic
->snicvf
[qidx
]->netdev
);
1067 nic
->snicvf
[qidx
] = NULL
;
1071 /* Disable RBDR & QS error interrupts */
1072 for (qidx
= 0; qidx
< qs
->rbdr_cnt
; qidx
++) {
1073 nicvf_disable_intr(nic
, NICVF_INTR_RBDR
, qidx
);
1074 nicvf_clear_intr(nic
, NICVF_INTR_RBDR
, qidx
);
1076 nicvf_disable_intr(nic
, NICVF_INTR_QS_ERR
, 0);
1077 nicvf_clear_intr(nic
, NICVF_INTR_QS_ERR
, 0);
1079 /* Wait for pending IRQ handlers to finish */
1080 for (irq
= 0; irq
< nic
->num_vec
; irq
++)
1081 synchronize_irq(nic
->msix_entries
[irq
].vector
);
1083 tasklet_kill(&nic
->rbdr_task
);
1084 tasklet_kill(&nic
->qs_err_task
);
1085 if (nic
->rb_work_scheduled
)
1086 cancel_delayed_work_sync(&nic
->rbdr_work
);
1088 for (qidx
= 0; qidx
< nic
->qs
->cq_cnt
; qidx
++) {
1089 cq_poll
= nic
->napi
[qidx
];
1092 napi_synchronize(&cq_poll
->napi
);
1093 /* CQ intr is enabled while napi_complete,
1096 nicvf_disable_intr(nic
, NICVF_INTR_CQ
, qidx
);
1097 nicvf_clear_intr(nic
, NICVF_INTR_CQ
, qidx
);
1098 napi_disable(&cq_poll
->napi
);
1099 netif_napi_del(&cq_poll
->napi
);
1102 netif_tx_disable(netdev
);
1104 /* Free resources */
1105 nicvf_config_data_transfer(nic
, false);
1107 /* Disable HW Qset */
1108 nicvf_qset_config(nic
, false);
1110 /* disable mailbox interrupt */
1111 nicvf_disable_intr(nic
, NICVF_INTR_MBOX
, 0);
1113 nicvf_unregister_interrupts(nic
);
1115 nicvf_free_cq_poll(nic
);
1117 /* Clear multiqset info */
1124 int nicvf_open(struct net_device
*netdev
)
1127 struct nicvf
*nic
= netdev_priv(netdev
);
1128 struct queue_set
*qs
= nic
->qs
;
1129 struct nicvf_cq_poll
*cq_poll
= NULL
;
1131 nic
->mtu
= netdev
->mtu
;
1133 netif_carrier_off(netdev
);
1135 err
= nicvf_register_misc_interrupt(nic
);
1139 /* Register NAPI handler for processing CQEs */
1140 for (qidx
= 0; qidx
< qs
->cq_cnt
; qidx
++) {
1141 cq_poll
= kzalloc(sizeof(*cq_poll
), GFP_KERNEL
);
1146 cq_poll
->cq_idx
= qidx
;
1147 cq_poll
->nicvf
= nic
;
1148 netif_napi_add(netdev
, &cq_poll
->napi
, nicvf_poll
,
1150 napi_enable(&cq_poll
->napi
);
1151 nic
->napi
[qidx
] = cq_poll
;
1154 /* Check if we got MAC address from PF or else generate a radom MAC */
1155 if (is_zero_ether_addr(netdev
->dev_addr
)) {
1156 eth_hw_addr_random(netdev
);
1157 nicvf_hw_set_mac_addr(nic
, netdev
);
1160 if (nic
->set_mac_pending
) {
1161 nic
->set_mac_pending
= false;
1162 nicvf_hw_set_mac_addr(nic
, netdev
);
1165 /* Init tasklet for handling Qset err interrupt */
1166 tasklet_init(&nic
->qs_err_task
, nicvf_handle_qs_err
,
1167 (unsigned long)nic
);
1169 /* Init RBDR tasklet which will refill RBDR */
1170 tasklet_init(&nic
->rbdr_task
, nicvf_rbdr_task
,
1171 (unsigned long)nic
);
1172 INIT_DELAYED_WORK(&nic
->rbdr_work
, nicvf_rbdr_work
);
1174 /* Configure CPI alorithm */
1175 nic
->cpi_alg
= cpi_alg
;
1177 nicvf_config_cpi(nic
);
1179 nicvf_request_sqs(nic
);
1181 nicvf_get_primary_vf_struct(nic
);
1183 /* Configure receive side scaling */
1185 nicvf_rss_init(nic
);
1187 err
= nicvf_register_interrupts(nic
);
1191 /* Initialize the queues */
1192 err
= nicvf_init_resources(nic
);
1196 /* Make sure queue initialization is written */
1199 nicvf_reg_write(nic
, NIC_VF_INT
, -1);
1200 /* Enable Qset err interrupt */
1201 nicvf_enable_intr(nic
, NICVF_INTR_QS_ERR
, 0);
1203 /* Enable completion queue interrupt */
1204 for (qidx
= 0; qidx
< qs
->cq_cnt
; qidx
++)
1205 nicvf_enable_intr(nic
, NICVF_INTR_CQ
, qidx
);
1207 /* Enable RBDR threshold interrupt */
1208 for (qidx
= 0; qidx
< qs
->rbdr_cnt
; qidx
++)
1209 nicvf_enable_intr(nic
, NICVF_INTR_RBDR
, qidx
);
1211 nic
->drv_stats
.txq_stop
= 0;
1212 nic
->drv_stats
.txq_wake
= 0;
1214 netif_carrier_on(netdev
);
1215 netif_tx_start_all_queues(netdev
);
1219 nicvf_disable_intr(nic
, NICVF_INTR_MBOX
, 0);
1220 nicvf_unregister_interrupts(nic
);
1221 tasklet_kill(&nic
->qs_err_task
);
1222 tasklet_kill(&nic
->rbdr_task
);
1224 for (qidx
= 0; qidx
< qs
->cq_cnt
; qidx
++) {
1225 cq_poll
= nic
->napi
[qidx
];
1228 napi_disable(&cq_poll
->napi
);
1229 netif_napi_del(&cq_poll
->napi
);
1231 nicvf_free_cq_poll(nic
);
1235 static int nicvf_update_hw_max_frs(struct nicvf
*nic
, int mtu
)
1237 union nic_mbx mbx
= {};
1239 mbx
.frs
.msg
= NIC_MBOX_MSG_SET_MAX_FRS
;
1240 mbx
.frs
.max_frs
= mtu
;
1241 mbx
.frs
.vf_id
= nic
->vf_id
;
1243 return nicvf_send_msg_to_pf(nic
, &mbx
);
1246 static int nicvf_change_mtu(struct net_device
*netdev
, int new_mtu
)
1248 struct nicvf
*nic
= netdev_priv(netdev
);
1250 if (new_mtu
> NIC_HW_MAX_FRS
)
1253 if (new_mtu
< NIC_HW_MIN_FRS
)
1256 if (nicvf_update_hw_max_frs(nic
, new_mtu
))
1258 netdev
->mtu
= new_mtu
;
1264 static int nicvf_set_mac_address(struct net_device
*netdev
, void *p
)
1266 struct sockaddr
*addr
= p
;
1267 struct nicvf
*nic
= netdev_priv(netdev
);
1269 if (!is_valid_ether_addr(addr
->sa_data
))
1270 return -EADDRNOTAVAIL
;
1272 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
1274 if (nic
->msix_enabled
) {
1275 if (nicvf_hw_set_mac_addr(nic
, netdev
))
1278 nic
->set_mac_pending
= true;
1284 void nicvf_update_lmac_stats(struct nicvf
*nic
)
1287 union nic_mbx mbx
= {};
1289 if (!netif_running(nic
->netdev
))
1292 mbx
.bgx_stats
.msg
= NIC_MBOX_MSG_BGX_STATS
;
1293 mbx
.bgx_stats
.vf_id
= nic
->vf_id
;
1295 mbx
.bgx_stats
.rx
= 1;
1296 while (stat
< BGX_RX_STATS_COUNT
) {
1297 mbx
.bgx_stats
.idx
= stat
;
1298 if (nicvf_send_msg_to_pf(nic
, &mbx
))
1306 mbx
.bgx_stats
.rx
= 0;
1307 while (stat
< BGX_TX_STATS_COUNT
) {
1308 mbx
.bgx_stats
.idx
= stat
;
1309 if (nicvf_send_msg_to_pf(nic
, &mbx
))
1315 void nicvf_update_stats(struct nicvf
*nic
)
1318 struct nicvf_hw_stats
*stats
= &nic
->hw_stats
;
1319 struct nicvf_drv_stats
*drv_stats
= &nic
->drv_stats
;
1320 struct queue_set
*qs
= nic
->qs
;
1322 #define GET_RX_STATS(reg) \
1323 nicvf_reg_read(nic, NIC_VNIC_RX_STAT_0_13 | (reg << 3))
1324 #define GET_TX_STATS(reg) \
1325 nicvf_reg_read(nic, NIC_VNIC_TX_STAT_0_4 | (reg << 3))
1327 stats
->rx_bytes
= GET_RX_STATS(RX_OCTS
);
1328 stats
->rx_ucast_frames
= GET_RX_STATS(RX_UCAST
);
1329 stats
->rx_bcast_frames
= GET_RX_STATS(RX_BCAST
);
1330 stats
->rx_mcast_frames
= GET_RX_STATS(RX_MCAST
);
1331 stats
->rx_fcs_errors
= GET_RX_STATS(RX_FCS
);
1332 stats
->rx_l2_errors
= GET_RX_STATS(RX_L2ERR
);
1333 stats
->rx_drop_red
= GET_RX_STATS(RX_RED
);
1334 stats
->rx_drop_red_bytes
= GET_RX_STATS(RX_RED_OCTS
);
1335 stats
->rx_drop_overrun
= GET_RX_STATS(RX_ORUN
);
1336 stats
->rx_drop_overrun_bytes
= GET_RX_STATS(RX_ORUN_OCTS
);
1337 stats
->rx_drop_bcast
= GET_RX_STATS(RX_DRP_BCAST
);
1338 stats
->rx_drop_mcast
= GET_RX_STATS(RX_DRP_MCAST
);
1339 stats
->rx_drop_l3_bcast
= GET_RX_STATS(RX_DRP_L3BCAST
);
1340 stats
->rx_drop_l3_mcast
= GET_RX_STATS(RX_DRP_L3MCAST
);
1342 stats
->tx_bytes_ok
= GET_TX_STATS(TX_OCTS
);
1343 stats
->tx_ucast_frames_ok
= GET_TX_STATS(TX_UCAST
);
1344 stats
->tx_bcast_frames_ok
= GET_TX_STATS(TX_BCAST
);
1345 stats
->tx_mcast_frames_ok
= GET_TX_STATS(TX_MCAST
);
1346 stats
->tx_drops
= GET_TX_STATS(TX_DROP
);
1348 drv_stats
->tx_frames_ok
= stats
->tx_ucast_frames_ok
+
1349 stats
->tx_bcast_frames_ok
+
1350 stats
->tx_mcast_frames_ok
;
1351 drv_stats
->rx_drops
= stats
->rx_drop_red
+
1352 stats
->rx_drop_overrun
;
1353 drv_stats
->tx_drops
= stats
->tx_drops
;
1355 /* Update RQ and SQ stats */
1356 for (qidx
= 0; qidx
< qs
->rq_cnt
; qidx
++)
1357 nicvf_update_rq_stats(nic
, qidx
);
1358 for (qidx
= 0; qidx
< qs
->sq_cnt
; qidx
++)
1359 nicvf_update_sq_stats(nic
, qidx
);
1362 static struct rtnl_link_stats64
*nicvf_get_stats64(struct net_device
*netdev
,
1363 struct rtnl_link_stats64
*stats
)
1365 struct nicvf
*nic
= netdev_priv(netdev
);
1366 struct nicvf_hw_stats
*hw_stats
= &nic
->hw_stats
;
1367 struct nicvf_drv_stats
*drv_stats
= &nic
->drv_stats
;
1369 nicvf_update_stats(nic
);
1371 stats
->rx_bytes
= hw_stats
->rx_bytes
;
1372 stats
->rx_packets
= drv_stats
->rx_frames_ok
;
1373 stats
->rx_dropped
= drv_stats
->rx_drops
;
1374 stats
->multicast
= hw_stats
->rx_mcast_frames
;
1376 stats
->tx_bytes
= hw_stats
->tx_bytes_ok
;
1377 stats
->tx_packets
= drv_stats
->tx_frames_ok
;
1378 stats
->tx_dropped
= drv_stats
->tx_drops
;
1383 static void nicvf_tx_timeout(struct net_device
*dev
)
1385 struct nicvf
*nic
= netdev_priv(dev
);
1387 if (netif_msg_tx_err(nic
))
1388 netdev_warn(dev
, "%s: Transmit timed out, resetting\n",
1391 schedule_work(&nic
->reset_task
);
1394 static void nicvf_reset_task(struct work_struct
*work
)
1398 nic
= container_of(work
, struct nicvf
, reset_task
);
1400 if (!netif_running(nic
->netdev
))
1403 nicvf_stop(nic
->netdev
);
1404 nicvf_open(nic
->netdev
);
1405 nic
->netdev
->trans_start
= jiffies
;
1408 static int nicvf_config_loopback(struct nicvf
*nic
,
1409 netdev_features_t features
)
1411 union nic_mbx mbx
= {};
1413 mbx
.lbk
.msg
= NIC_MBOX_MSG_LOOPBACK
;
1414 mbx
.lbk
.vf_id
= nic
->vf_id
;
1415 mbx
.lbk
.enable
= (features
& NETIF_F_LOOPBACK
) != 0;
1417 return nicvf_send_msg_to_pf(nic
, &mbx
);
1420 static netdev_features_t
nicvf_fix_features(struct net_device
*netdev
,
1421 netdev_features_t features
)
1423 struct nicvf
*nic
= netdev_priv(netdev
);
1425 if ((features
& NETIF_F_LOOPBACK
) &&
1426 netif_running(netdev
) && !nic
->loopback_supported
)
1427 features
&= ~NETIF_F_LOOPBACK
;
1432 static int nicvf_set_features(struct net_device
*netdev
,
1433 netdev_features_t features
)
1435 struct nicvf
*nic
= netdev_priv(netdev
);
1436 netdev_features_t changed
= features
^ netdev
->features
;
1438 if (changed
& NETIF_F_HW_VLAN_CTAG_RX
)
1439 nicvf_config_vlan_stripping(nic
, features
);
1441 if ((changed
& NETIF_F_LOOPBACK
) && netif_running(netdev
))
1442 return nicvf_config_loopback(nic
, features
);
1447 static const struct net_device_ops nicvf_netdev_ops
= {
1448 .ndo_open
= nicvf_open
,
1449 .ndo_stop
= nicvf_stop
,
1450 .ndo_start_xmit
= nicvf_xmit
,
1451 .ndo_change_mtu
= nicvf_change_mtu
,
1452 .ndo_set_mac_address
= nicvf_set_mac_address
,
1453 .ndo_get_stats64
= nicvf_get_stats64
,
1454 .ndo_tx_timeout
= nicvf_tx_timeout
,
1455 .ndo_fix_features
= nicvf_fix_features
,
1456 .ndo_set_features
= nicvf_set_features
,
1459 static int nicvf_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
1461 struct device
*dev
= &pdev
->dev
;
1462 struct net_device
*netdev
;
1466 err
= pci_enable_device(pdev
);
1468 dev_err(dev
, "Failed to enable PCI device\n");
1472 err
= pci_request_regions(pdev
, DRV_NAME
);
1474 dev_err(dev
, "PCI request regions failed 0x%x\n", err
);
1475 goto err_disable_device
;
1478 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(48));
1480 dev_err(dev
, "Unable to get usable DMA configuration\n");
1481 goto err_release_regions
;
1484 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(48));
1486 dev_err(dev
, "unable to get 48-bit DMA for consistent allocations\n");
1487 goto err_release_regions
;
1490 qcount
= MAX_CMP_QUEUES_PER_QS
;
1492 /* Restrict multiqset support only for host bound VFs */
1493 if (pdev
->is_virtfn
) {
1494 /* Set max number of queues per VF */
1495 qcount
= roundup(num_online_cpus(), MAX_CMP_QUEUES_PER_QS
);
1496 qcount
= min(qcount
,
1497 (MAX_SQS_PER_VF
+ 1) * MAX_CMP_QUEUES_PER_QS
);
1500 netdev
= alloc_etherdev_mqs(sizeof(struct nicvf
), qcount
, qcount
);
1503 goto err_release_regions
;
1506 pci_set_drvdata(pdev
, netdev
);
1508 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
1510 nic
= netdev_priv(netdev
);
1511 nic
->netdev
= netdev
;
1514 nic
->max_queues
= qcount
;
1516 /* MAP VF's configuration registers */
1517 nic
->reg_base
= pcim_iomap(pdev
, PCI_CFG_REG_BAR_NUM
, 0);
1518 if (!nic
->reg_base
) {
1519 dev_err(dev
, "Cannot map config register space, aborting\n");
1521 goto err_free_netdev
;
1524 err
= nicvf_set_qset_resources(nic
);
1526 goto err_free_netdev
;
1528 /* Check if PF is alive and get MAC address for this VF */
1529 err
= nicvf_register_misc_interrupt(nic
);
1531 goto err_free_netdev
;
1533 nicvf_send_vf_struct(nic
);
1535 /* Check if this VF is in QS only mode */
1539 err
= nicvf_set_real_num_queues(netdev
, nic
->tx_queues
, nic
->rx_queues
);
1541 goto err_unregister_interrupts
;
1543 netdev
->hw_features
= (NETIF_F_RXCSUM
| NETIF_F_IP_CSUM
| NETIF_F_SG
|
1544 NETIF_F_TSO
| NETIF_F_GRO
|
1545 NETIF_F_HW_VLAN_CTAG_RX
);
1547 netdev
->hw_features
|= NETIF_F_RXHASH
;
1549 netdev
->features
|= netdev
->hw_features
;
1550 netdev
->hw_features
|= NETIF_F_LOOPBACK
;
1552 netdev
->vlan_features
= NETIF_F_SG
| NETIF_F_IP_CSUM
| NETIF_F_TSO
;
1554 netdev
->netdev_ops
= &nicvf_netdev_ops
;
1555 netdev
->watchdog_timeo
= NICVF_TX_TIMEOUT
;
1557 INIT_WORK(&nic
->reset_task
, nicvf_reset_task
);
1559 err
= register_netdev(netdev
);
1561 dev_err(dev
, "Failed to register netdevice\n");
1562 goto err_unregister_interrupts
;
1565 nic
->msg_enable
= debug
;
1567 nicvf_set_ethtool_ops(netdev
);
1571 err_unregister_interrupts
:
1572 nicvf_unregister_interrupts(nic
);
1574 pci_set_drvdata(pdev
, NULL
);
1575 free_netdev(netdev
);
1576 err_release_regions
:
1577 pci_release_regions(pdev
);
1579 pci_disable_device(pdev
);
1583 static void nicvf_remove(struct pci_dev
*pdev
)
1585 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1586 struct nicvf
*nic
= netdev_priv(netdev
);
1587 struct net_device
*pnetdev
= nic
->pnicvf
->netdev
;
1589 /* Check if this Qset is assigned to different VF.
1590 * If yes, clean primary and all secondary Qsets.
1592 if (pnetdev
&& (pnetdev
->reg_state
== NETREG_REGISTERED
))
1593 unregister_netdev(pnetdev
);
1594 nicvf_unregister_interrupts(nic
);
1595 pci_set_drvdata(pdev
, NULL
);
1596 free_netdev(netdev
);
1597 pci_release_regions(pdev
);
1598 pci_disable_device(pdev
);
1601 static void nicvf_shutdown(struct pci_dev
*pdev
)
1606 static struct pci_driver nicvf_driver
= {
1608 .id_table
= nicvf_id_table
,
1609 .probe
= nicvf_probe
,
1610 .remove
= nicvf_remove
,
1611 .shutdown
= nicvf_shutdown
,
1614 static int __init
nicvf_init_module(void)
1616 pr_info("%s, ver %s\n", DRV_NAME
, DRV_VERSION
);
1618 return pci_register_driver(&nicvf_driver
);
1621 static void __exit
nicvf_cleanup_module(void)
1623 pci_unregister_driver(&nicvf_driver
);
1626 module_init(nicvf_init_module
);
1627 module_exit(nicvf_cleanup_module
);