2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/errno.h>
24 #include <linux/types.h>
25 #include <linux/init.h>
26 #include <linux/interrupt.h>
27 #include <linux/workqueue.h>
28 #include <linux/pci.h>
29 #include <linux/netdevice.h>
30 #include <linux/etherdevice.h>
32 #include <linux/if_ether.h>
33 #include <linux/if_vlan.h>
36 #include <linux/ipv6.h>
37 #include <linux/tcp.h>
38 #include <linux/rtnetlink.h>
39 #include <linux/prefetch.h>
40 #include <net/ip6_checksum.h>
41 #include <linux/ktime.h>
42 #ifdef CONFIG_RFS_ACCEL
43 #include <linux/cpu_rmap.h>
45 #ifdef CONFIG_NET_RX_BUSY_POLL
46 #include <net/busy_poll.h>
48 #include <linux/crash_dump.h>
50 #include "cq_enet_desc.h"
52 #include "vnic_intr.h"
53 #include "vnic_stats.h"
59 #include "enic_clsf.h"
61 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
62 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
63 #define MAX_TSO (1 << 16)
64 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
66 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
67 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
68 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */
70 #define RX_COPYBREAK_DEFAULT 256
72 /* Supported devices */
73 static const struct pci_device_id enic_id_table
[] = {
74 { PCI_VDEVICE(CISCO
, PCI_DEVICE_ID_CISCO_VIC_ENET
) },
75 { PCI_VDEVICE(CISCO
, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN
) },
76 { PCI_VDEVICE(CISCO
, PCI_DEVICE_ID_CISCO_VIC_ENET_VF
) },
77 { 0, } /* end of table */
80 MODULE_DESCRIPTION(DRV_DESCRIPTION
);
81 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
82 MODULE_LICENSE("GPL");
83 MODULE_VERSION(DRV_VERSION
);
84 MODULE_DEVICE_TABLE(pci
, enic_id_table
);
86 #define ENIC_LARGE_PKT_THRESHOLD 1000
87 #define ENIC_MAX_COALESCE_TIMERS 10
88 /* Interrupt moderation table, which will be used to decide the
89 * coalescing timer values
90 * {rx_rate in Mbps, mapping percentage of the range}
92 static struct enic_intr_mod_table mod_table
[ENIC_MAX_COALESCE_TIMERS
+ 1] = {
106 /* This table helps the driver to pick different ranges for rx coalescing
107 * timer depending on the link speed.
109 static struct enic_intr_mod_range mod_range
[ENIC_MAX_LINK_SPEEDS
] = {
110 {0, 0}, /* 0 - 4 Gbps */
111 {0, 3}, /* 4 - 10 Gbps */
112 {3, 6}, /* 10 - 40 Gbps */
115 int enic_is_dynamic(struct enic
*enic
)
117 return enic
->pdev
->device
== PCI_DEVICE_ID_CISCO_VIC_ENET_DYN
;
120 int enic_sriov_enabled(struct enic
*enic
)
122 return (enic
->priv_flags
& ENIC_SRIOV_ENABLED
) ? 1 : 0;
125 static int enic_is_sriov_vf(struct enic
*enic
)
127 return enic
->pdev
->device
== PCI_DEVICE_ID_CISCO_VIC_ENET_VF
;
130 int enic_is_valid_vf(struct enic
*enic
, int vf
)
132 #ifdef CONFIG_PCI_IOV
133 return vf
>= 0 && vf
< enic
->num_vfs
;
139 static void enic_free_wq_buf(struct vnic_wq
*wq
, struct vnic_wq_buf
*buf
)
141 struct enic
*enic
= vnic_dev_priv(wq
->vdev
);
144 pci_unmap_single(enic
->pdev
, buf
->dma_addr
,
145 buf
->len
, PCI_DMA_TODEVICE
);
147 pci_unmap_page(enic
->pdev
, buf
->dma_addr
,
148 buf
->len
, PCI_DMA_TODEVICE
);
151 dev_kfree_skb_any(buf
->os_buf
);
154 static void enic_wq_free_buf(struct vnic_wq
*wq
,
155 struct cq_desc
*cq_desc
, struct vnic_wq_buf
*buf
, void *opaque
)
157 enic_free_wq_buf(wq
, buf
);
160 static int enic_wq_service(struct vnic_dev
*vdev
, struct cq_desc
*cq_desc
,
161 u8 type
, u16 q_number
, u16 completed_index
, void *opaque
)
163 struct enic
*enic
= vnic_dev_priv(vdev
);
165 spin_lock(&enic
->wq_lock
[q_number
]);
167 vnic_wq_service(&enic
->wq
[q_number
], cq_desc
,
168 completed_index
, enic_wq_free_buf
,
171 if (netif_tx_queue_stopped(netdev_get_tx_queue(enic
->netdev
, q_number
)) &&
172 vnic_wq_desc_avail(&enic
->wq
[q_number
]) >=
173 (MAX_SKB_FRAGS
+ ENIC_DESC_MAX_SPLITS
))
174 netif_wake_subqueue(enic
->netdev
, q_number
);
176 spin_unlock(&enic
->wq_lock
[q_number
]);
181 static void enic_log_q_error(struct enic
*enic
)
186 for (i
= 0; i
< enic
->wq_count
; i
++) {
187 error_status
= vnic_wq_error_status(&enic
->wq
[i
]);
189 netdev_err(enic
->netdev
, "WQ[%d] error_status %d\n",
193 for (i
= 0; i
< enic
->rq_count
; i
++) {
194 error_status
= vnic_rq_error_status(&enic
->rq
[i
]);
196 netdev_err(enic
->netdev
, "RQ[%d] error_status %d\n",
201 static void enic_msglvl_check(struct enic
*enic
)
203 u32 msg_enable
= vnic_dev_msg_lvl(enic
->vdev
);
205 if (msg_enable
!= enic
->msg_enable
) {
206 netdev_info(enic
->netdev
, "msg lvl changed from 0x%x to 0x%x\n",
207 enic
->msg_enable
, msg_enable
);
208 enic
->msg_enable
= msg_enable
;
212 static void enic_mtu_check(struct enic
*enic
)
214 u32 mtu
= vnic_dev_mtu(enic
->vdev
);
215 struct net_device
*netdev
= enic
->netdev
;
217 if (mtu
&& mtu
!= enic
->port_mtu
) {
218 enic
->port_mtu
= mtu
;
219 if (enic_is_dynamic(enic
) || enic_is_sriov_vf(enic
)) {
220 mtu
= max_t(int, ENIC_MIN_MTU
,
221 min_t(int, ENIC_MAX_MTU
, mtu
));
222 if (mtu
!= netdev
->mtu
)
223 schedule_work(&enic
->change_mtu_work
);
225 if (mtu
< netdev
->mtu
)
227 "interface MTU (%d) set higher "
228 "than switch port MTU (%d)\n",
234 static void enic_link_check(struct enic
*enic
)
236 int link_status
= vnic_dev_link_status(enic
->vdev
);
237 int carrier_ok
= netif_carrier_ok(enic
->netdev
);
239 if (link_status
&& !carrier_ok
) {
240 netdev_info(enic
->netdev
, "Link UP\n");
241 netif_carrier_on(enic
->netdev
);
242 } else if (!link_status
&& carrier_ok
) {
243 netdev_info(enic
->netdev
, "Link DOWN\n");
244 netif_carrier_off(enic
->netdev
);
248 static void enic_notify_check(struct enic
*enic
)
250 enic_msglvl_check(enic
);
251 enic_mtu_check(enic
);
252 enic_link_check(enic
);
255 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
257 static irqreturn_t
enic_isr_legacy(int irq
, void *data
)
259 struct net_device
*netdev
= data
;
260 struct enic
*enic
= netdev_priv(netdev
);
261 unsigned int io_intr
= enic_legacy_io_intr();
262 unsigned int err_intr
= enic_legacy_err_intr();
263 unsigned int notify_intr
= enic_legacy_notify_intr();
266 vnic_intr_mask(&enic
->intr
[io_intr
]);
268 pba
= vnic_intr_legacy_pba(enic
->legacy_pba
);
270 vnic_intr_unmask(&enic
->intr
[io_intr
]);
271 return IRQ_NONE
; /* not our interrupt */
274 if (ENIC_TEST_INTR(pba
, notify_intr
)) {
275 enic_notify_check(enic
);
276 vnic_intr_return_all_credits(&enic
->intr
[notify_intr
]);
279 if (ENIC_TEST_INTR(pba
, err_intr
)) {
280 vnic_intr_return_all_credits(&enic
->intr
[err_intr
]);
281 enic_log_q_error(enic
);
282 /* schedule recovery from WQ/RQ error */
283 schedule_work(&enic
->reset
);
287 if (ENIC_TEST_INTR(pba
, io_intr
))
288 napi_schedule_irqoff(&enic
->napi
[0]);
290 vnic_intr_unmask(&enic
->intr
[io_intr
]);
295 static irqreturn_t
enic_isr_msi(int irq
, void *data
)
297 struct enic
*enic
= data
;
299 /* With MSI, there is no sharing of interrupts, so this is
300 * our interrupt and there is no need to ack it. The device
301 * is not providing per-vector masking, so the OS will not
302 * write to PCI config space to mask/unmask the interrupt.
303 * We're using mask_on_assertion for MSI, so the device
304 * automatically masks the interrupt when the interrupt is
305 * generated. Later, when exiting polling, the interrupt
306 * will be unmasked (see enic_poll).
308 * Also, the device uses the same PCIe Traffic Class (TC)
309 * for Memory Write data and MSI, so there are no ordering
310 * issues; the MSI will always arrive at the Root Complex
311 * _after_ corresponding Memory Writes (i.e. descriptor
315 napi_schedule_irqoff(&enic
->napi
[0]);
320 static irqreturn_t
enic_isr_msix(int irq
, void *data
)
322 struct napi_struct
*napi
= data
;
324 napi_schedule_irqoff(napi
);
329 static irqreturn_t
enic_isr_msix_err(int irq
, void *data
)
331 struct enic
*enic
= data
;
332 unsigned int intr
= enic_msix_err_intr(enic
);
334 vnic_intr_return_all_credits(&enic
->intr
[intr
]);
336 enic_log_q_error(enic
);
338 /* schedule recovery from WQ/RQ error */
339 schedule_work(&enic
->reset
);
344 static irqreturn_t
enic_isr_msix_notify(int irq
, void *data
)
346 struct enic
*enic
= data
;
347 unsigned int intr
= enic_msix_notify_intr(enic
);
349 enic_notify_check(enic
);
350 vnic_intr_return_all_credits(&enic
->intr
[intr
]);
355 static int enic_queue_wq_skb_cont(struct enic
*enic
, struct vnic_wq
*wq
,
356 struct sk_buff
*skb
, unsigned int len_left
,
359 const skb_frag_t
*frag
;
362 /* Queue additional data fragments */
363 for (frag
= skb_shinfo(skb
)->frags
; len_left
; frag
++) {
364 len_left
-= skb_frag_size(frag
);
365 dma_addr
= skb_frag_dma_map(&enic
->pdev
->dev
, frag
, 0,
368 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
370 enic_queue_wq_desc_cont(wq
, skb
, dma_addr
, skb_frag_size(frag
),
371 (len_left
== 0), /* EOP? */
378 static int enic_queue_wq_skb_vlan(struct enic
*enic
, struct vnic_wq
*wq
,
379 struct sk_buff
*skb
, int vlan_tag_insert
,
380 unsigned int vlan_tag
, int loopback
)
382 unsigned int head_len
= skb_headlen(skb
);
383 unsigned int len_left
= skb
->len
- head_len
;
384 int eop
= (len_left
== 0);
388 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
, head_len
,
390 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
393 /* Queue the main skb fragment. The fragments are no larger
394 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
395 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
396 * per fragment is queued.
398 enic_queue_wq_desc(wq
, skb
, dma_addr
, head_len
, vlan_tag_insert
,
399 vlan_tag
, eop
, loopback
);
402 err
= enic_queue_wq_skb_cont(enic
, wq
, skb
, len_left
, loopback
);
407 static int enic_queue_wq_skb_csum_l4(struct enic
*enic
, struct vnic_wq
*wq
,
408 struct sk_buff
*skb
, int vlan_tag_insert
,
409 unsigned int vlan_tag
, int loopback
)
411 unsigned int head_len
= skb_headlen(skb
);
412 unsigned int len_left
= skb
->len
- head_len
;
413 unsigned int hdr_len
= skb_checksum_start_offset(skb
);
414 unsigned int csum_offset
= hdr_len
+ skb
->csum_offset
;
415 int eop
= (len_left
== 0);
419 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
, head_len
,
421 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
424 /* Queue the main skb fragment. The fragments are no larger
425 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
426 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
427 * per fragment is queued.
429 enic_queue_wq_desc_csum_l4(wq
, skb
, dma_addr
, head_len
, csum_offset
,
430 hdr_len
, vlan_tag_insert
, vlan_tag
, eop
,
434 err
= enic_queue_wq_skb_cont(enic
, wq
, skb
, len_left
, loopback
);
439 static int enic_queue_wq_skb_tso(struct enic
*enic
, struct vnic_wq
*wq
,
440 struct sk_buff
*skb
, unsigned int mss
,
441 int vlan_tag_insert
, unsigned int vlan_tag
,
444 unsigned int frag_len_left
= skb_headlen(skb
);
445 unsigned int len_left
= skb
->len
- frag_len_left
;
446 unsigned int hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
447 int eop
= (len_left
== 0);
450 unsigned int offset
= 0;
453 /* Preload TCP csum field with IP pseudo hdr calculated
454 * with IP length set to zero. HW will later add in length
455 * to each TCP segment resulting from the TSO.
458 if (skb
->protocol
== cpu_to_be16(ETH_P_IP
)) {
459 ip_hdr(skb
)->check
= 0;
460 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(ip_hdr(skb
)->saddr
,
461 ip_hdr(skb
)->daddr
, 0, IPPROTO_TCP
, 0);
462 } else if (skb
->protocol
== cpu_to_be16(ETH_P_IPV6
)) {
463 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
464 &ipv6_hdr(skb
)->daddr
, 0, IPPROTO_TCP
, 0);
467 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
468 * for the main skb fragment
470 while (frag_len_left
) {
471 len
= min(frag_len_left
, (unsigned int)WQ_ENET_MAX_DESC_LEN
);
472 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
+ offset
, len
,
474 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
476 enic_queue_wq_desc_tso(wq
, skb
, dma_addr
, len
, mss
, hdr_len
,
477 vlan_tag_insert
, vlan_tag
,
478 eop
&& (len
== frag_len_left
), loopback
);
479 frag_len_left
-= len
;
486 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
487 * for additional data fragments
489 for (frag
= skb_shinfo(skb
)->frags
; len_left
; frag
++) {
490 len_left
-= skb_frag_size(frag
);
491 frag_len_left
= skb_frag_size(frag
);
494 while (frag_len_left
) {
495 len
= min(frag_len_left
,
496 (unsigned int)WQ_ENET_MAX_DESC_LEN
);
497 dma_addr
= skb_frag_dma_map(&enic
->pdev
->dev
, frag
,
500 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
502 enic_queue_wq_desc_cont(wq
, skb
, dma_addr
, len
,
504 (len
== frag_len_left
),/*EOP*/
506 frag_len_left
-= len
;
514 static inline void enic_queue_wq_skb(struct enic
*enic
,
515 struct vnic_wq
*wq
, struct sk_buff
*skb
)
517 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
518 unsigned int vlan_tag
= 0;
519 int vlan_tag_insert
= 0;
523 if (skb_vlan_tag_present(skb
)) {
524 /* VLAN tag from trunking driver */
526 vlan_tag
= skb_vlan_tag_get(skb
);
527 } else if (enic
->loop_enable
) {
528 vlan_tag
= enic
->loop_tag
;
533 err
= enic_queue_wq_skb_tso(enic
, wq
, skb
, mss
,
534 vlan_tag_insert
, vlan_tag
,
536 else if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
537 err
= enic_queue_wq_skb_csum_l4(enic
, wq
, skb
, vlan_tag_insert
,
540 err
= enic_queue_wq_skb_vlan(enic
, wq
, skb
, vlan_tag_insert
,
543 struct vnic_wq_buf
*buf
;
545 buf
= wq
->to_use
->prev
;
546 /* while not EOP of previous pkt && queue not empty.
547 * For all non EOP bufs, os_buf is NULL.
549 while (!buf
->os_buf
&& (buf
->next
!= wq
->to_clean
)) {
550 enic_free_wq_buf(wq
, buf
);
551 wq
->ring
.desc_avail
++;
554 wq
->to_use
= buf
->next
;
559 /* netif_tx_lock held, process context with BHs disabled, or BH */
560 static netdev_tx_t
enic_hard_start_xmit(struct sk_buff
*skb
,
561 struct net_device
*netdev
)
563 struct enic
*enic
= netdev_priv(netdev
);
565 unsigned int txq_map
;
566 struct netdev_queue
*txq
;
569 dev_kfree_skb_any(skb
);
573 txq_map
= skb_get_queue_mapping(skb
) % enic
->wq_count
;
574 wq
= &enic
->wq
[txq_map
];
575 txq
= netdev_get_tx_queue(netdev
, txq_map
);
577 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
578 * which is very likely. In the off chance it's going to take
579 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
582 if (skb_shinfo(skb
)->gso_size
== 0 &&
583 skb_shinfo(skb
)->nr_frags
+ 1 > ENIC_NON_TSO_MAX_DESC
&&
584 skb_linearize(skb
)) {
585 dev_kfree_skb_any(skb
);
589 spin_lock(&enic
->wq_lock
[txq_map
]);
591 if (vnic_wq_desc_avail(wq
) <
592 skb_shinfo(skb
)->nr_frags
+ ENIC_DESC_MAX_SPLITS
) {
593 netif_tx_stop_queue(txq
);
594 /* This is a hard error, log it */
595 netdev_err(netdev
, "BUG! Tx ring full when queue awake!\n");
596 spin_unlock(&enic
->wq_lock
[txq_map
]);
597 return NETDEV_TX_BUSY
;
600 enic_queue_wq_skb(enic
, wq
, skb
);
602 if (vnic_wq_desc_avail(wq
) < MAX_SKB_FRAGS
+ ENIC_DESC_MAX_SPLITS
)
603 netif_tx_stop_queue(txq
);
604 if (!skb
->xmit_more
|| netif_xmit_stopped(txq
))
605 vnic_wq_doorbell(wq
);
607 spin_unlock(&enic
->wq_lock
[txq_map
]);
612 /* dev_base_lock rwlock held, nominally process context */
613 static struct rtnl_link_stats64
*enic_get_stats(struct net_device
*netdev
,
614 struct rtnl_link_stats64
*net_stats
)
616 struct enic
*enic
= netdev_priv(netdev
);
617 struct vnic_stats
*stats
;
620 err
= enic_dev_stats_dump(enic
, &stats
);
621 /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump
622 * For other failures, like devcmd failure, we return previously
628 net_stats
->tx_packets
= stats
->tx
.tx_frames_ok
;
629 net_stats
->tx_bytes
= stats
->tx
.tx_bytes_ok
;
630 net_stats
->tx_errors
= stats
->tx
.tx_errors
;
631 net_stats
->tx_dropped
= stats
->tx
.tx_drops
;
633 net_stats
->rx_packets
= stats
->rx
.rx_frames_ok
;
634 net_stats
->rx_bytes
= stats
->rx
.rx_bytes_ok
;
635 net_stats
->rx_errors
= stats
->rx
.rx_errors
;
636 net_stats
->multicast
= stats
->rx
.rx_multicast_frames_ok
;
637 net_stats
->rx_over_errors
= enic
->rq_truncated_pkts
;
638 net_stats
->rx_crc_errors
= enic
->rq_bad_fcs
;
639 net_stats
->rx_dropped
= stats
->rx
.rx_no_bufs
+ stats
->rx
.rx_drop
;
644 static int enic_mc_sync(struct net_device
*netdev
, const u8
*mc_addr
)
646 struct enic
*enic
= netdev_priv(netdev
);
648 if (enic
->mc_count
== ENIC_MULTICAST_PERFECT_FILTERS
) {
649 unsigned int mc_count
= netdev_mc_count(netdev
);
651 netdev_warn(netdev
, "Registering only %d out of %d multicast addresses\n",
652 ENIC_MULTICAST_PERFECT_FILTERS
, mc_count
);
657 enic_dev_add_addr(enic
, mc_addr
);
663 static int enic_mc_unsync(struct net_device
*netdev
, const u8
*mc_addr
)
665 struct enic
*enic
= netdev_priv(netdev
);
667 enic_dev_del_addr(enic
, mc_addr
);
673 static int enic_uc_sync(struct net_device
*netdev
, const u8
*uc_addr
)
675 struct enic
*enic
= netdev_priv(netdev
);
677 if (enic
->uc_count
== ENIC_UNICAST_PERFECT_FILTERS
) {
678 unsigned int uc_count
= netdev_uc_count(netdev
);
680 netdev_warn(netdev
, "Registering only %d out of %d unicast addresses\n",
681 ENIC_UNICAST_PERFECT_FILTERS
, uc_count
);
686 enic_dev_add_addr(enic
, uc_addr
);
692 static int enic_uc_unsync(struct net_device
*netdev
, const u8
*uc_addr
)
694 struct enic
*enic
= netdev_priv(netdev
);
696 enic_dev_del_addr(enic
, uc_addr
);
702 void enic_reset_addr_lists(struct enic
*enic
)
704 struct net_device
*netdev
= enic
->netdev
;
706 __dev_uc_unsync(netdev
, NULL
);
707 __dev_mc_unsync(netdev
, NULL
);
714 static int enic_set_mac_addr(struct net_device
*netdev
, char *addr
)
716 struct enic
*enic
= netdev_priv(netdev
);
718 if (enic_is_dynamic(enic
) || enic_is_sriov_vf(enic
)) {
719 if (!is_valid_ether_addr(addr
) && !is_zero_ether_addr(addr
))
720 return -EADDRNOTAVAIL
;
722 if (!is_valid_ether_addr(addr
))
723 return -EADDRNOTAVAIL
;
726 memcpy(netdev
->dev_addr
, addr
, netdev
->addr_len
);
731 static int enic_set_mac_address_dynamic(struct net_device
*netdev
, void *p
)
733 struct enic
*enic
= netdev_priv(netdev
);
734 struct sockaddr
*saddr
= p
;
735 char *addr
= saddr
->sa_data
;
738 if (netif_running(enic
->netdev
)) {
739 err
= enic_dev_del_station_addr(enic
);
744 err
= enic_set_mac_addr(netdev
, addr
);
748 if (netif_running(enic
->netdev
)) {
749 err
= enic_dev_add_station_addr(enic
);
757 static int enic_set_mac_address(struct net_device
*netdev
, void *p
)
759 struct sockaddr
*saddr
= p
;
760 char *addr
= saddr
->sa_data
;
761 struct enic
*enic
= netdev_priv(netdev
);
764 err
= enic_dev_del_station_addr(enic
);
768 err
= enic_set_mac_addr(netdev
, addr
);
772 return enic_dev_add_station_addr(enic
);
775 /* netif_tx_lock held, BHs disabled */
776 static void enic_set_rx_mode(struct net_device
*netdev
)
778 struct enic
*enic
= netdev_priv(netdev
);
780 int multicast
= (netdev
->flags
& IFF_MULTICAST
) ? 1 : 0;
781 int broadcast
= (netdev
->flags
& IFF_BROADCAST
) ? 1 : 0;
782 int promisc
= (netdev
->flags
& IFF_PROMISC
) ||
783 netdev_uc_count(netdev
) > ENIC_UNICAST_PERFECT_FILTERS
;
784 int allmulti
= (netdev
->flags
& IFF_ALLMULTI
) ||
785 netdev_mc_count(netdev
) > ENIC_MULTICAST_PERFECT_FILTERS
;
786 unsigned int flags
= netdev
->flags
|
787 (allmulti
? IFF_ALLMULTI
: 0) |
788 (promisc
? IFF_PROMISC
: 0);
790 if (enic
->flags
!= flags
) {
792 enic_dev_packet_filter(enic
, directed
,
793 multicast
, broadcast
, promisc
, allmulti
);
797 __dev_uc_sync(netdev
, enic_uc_sync
, enic_uc_unsync
);
799 __dev_mc_sync(netdev
, enic_mc_sync
, enic_mc_unsync
);
803 /* netif_tx_lock held, BHs disabled */
804 static void enic_tx_timeout(struct net_device
*netdev
)
806 struct enic
*enic
= netdev_priv(netdev
);
807 schedule_work(&enic
->reset
);
810 static int enic_set_vf_mac(struct net_device
*netdev
, int vf
, u8
*mac
)
812 struct enic
*enic
= netdev_priv(netdev
);
813 struct enic_port_profile
*pp
;
816 ENIC_PP_BY_INDEX(enic
, vf
, pp
, &err
);
820 if (is_valid_ether_addr(mac
) || is_zero_ether_addr(mac
)) {
821 if (vf
== PORT_SELF_VF
) {
822 memcpy(pp
->vf_mac
, mac
, ETH_ALEN
);
826 * For sriov vf's set the mac in hw
828 ENIC_DEVCMD_PROXY_BY_INDEX(vf
, err
, enic
,
829 vnic_dev_set_mac_addr
, mac
);
830 return enic_dev_status_to_errno(err
);
836 static int enic_set_vf_port(struct net_device
*netdev
, int vf
,
837 struct nlattr
*port
[])
839 struct enic
*enic
= netdev_priv(netdev
);
840 struct enic_port_profile prev_pp
;
841 struct enic_port_profile
*pp
;
842 int err
= 0, restore_pp
= 1;
844 ENIC_PP_BY_INDEX(enic
, vf
, pp
, &err
);
848 if (!port
[IFLA_PORT_REQUEST
])
851 memcpy(&prev_pp
, pp
, sizeof(*enic
->pp
));
852 memset(pp
, 0, sizeof(*enic
->pp
));
854 pp
->set
|= ENIC_SET_REQUEST
;
855 pp
->request
= nla_get_u8(port
[IFLA_PORT_REQUEST
]);
857 if (port
[IFLA_PORT_PROFILE
]) {
858 pp
->set
|= ENIC_SET_NAME
;
859 memcpy(pp
->name
, nla_data(port
[IFLA_PORT_PROFILE
]),
863 if (port
[IFLA_PORT_INSTANCE_UUID
]) {
864 pp
->set
|= ENIC_SET_INSTANCE
;
865 memcpy(pp
->instance_uuid
,
866 nla_data(port
[IFLA_PORT_INSTANCE_UUID
]), PORT_UUID_MAX
);
869 if (port
[IFLA_PORT_HOST_UUID
]) {
870 pp
->set
|= ENIC_SET_HOST
;
871 memcpy(pp
->host_uuid
,
872 nla_data(port
[IFLA_PORT_HOST_UUID
]), PORT_UUID_MAX
);
875 if (vf
== PORT_SELF_VF
) {
876 /* Special case handling: mac came from IFLA_VF_MAC */
877 if (!is_zero_ether_addr(prev_pp
.vf_mac
))
878 memcpy(pp
->mac_addr
, prev_pp
.vf_mac
, ETH_ALEN
);
880 if (is_zero_ether_addr(netdev
->dev_addr
))
881 eth_hw_addr_random(netdev
);
883 /* SR-IOV VF: get mac from adapter */
884 ENIC_DEVCMD_PROXY_BY_INDEX(vf
, err
, enic
,
885 vnic_dev_get_mac_addr
, pp
->mac_addr
);
887 netdev_err(netdev
, "Error getting mac for vf %d\n", vf
);
888 memcpy(pp
, &prev_pp
, sizeof(*pp
));
889 return enic_dev_status_to_errno(err
);
893 err
= enic_process_set_pp_request(enic
, vf
, &prev_pp
, &restore_pp
);
896 /* Things are still the way they were: Implicit
897 * DISASSOCIATE failed
899 memcpy(pp
, &prev_pp
, sizeof(*pp
));
901 memset(pp
, 0, sizeof(*pp
));
902 if (vf
== PORT_SELF_VF
)
903 eth_zero_addr(netdev
->dev_addr
);
906 /* Set flag to indicate that the port assoc/disassoc
907 * request has been sent out to fw
909 pp
->set
|= ENIC_PORT_REQUEST_APPLIED
;
911 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
912 if (pp
->request
== PORT_REQUEST_DISASSOCIATE
) {
913 eth_zero_addr(pp
->mac_addr
);
914 if (vf
== PORT_SELF_VF
)
915 eth_zero_addr(netdev
->dev_addr
);
919 if (vf
== PORT_SELF_VF
)
920 eth_zero_addr(pp
->vf_mac
);
925 static int enic_get_vf_port(struct net_device
*netdev
, int vf
,
928 struct enic
*enic
= netdev_priv(netdev
);
929 u16 response
= PORT_PROFILE_RESPONSE_SUCCESS
;
930 struct enic_port_profile
*pp
;
933 ENIC_PP_BY_INDEX(enic
, vf
, pp
, &err
);
937 if (!(pp
->set
& ENIC_PORT_REQUEST_APPLIED
))
940 err
= enic_process_get_pp_request(enic
, vf
, pp
->request
, &response
);
944 if (nla_put_u16(skb
, IFLA_PORT_REQUEST
, pp
->request
) ||
945 nla_put_u16(skb
, IFLA_PORT_RESPONSE
, response
) ||
946 ((pp
->set
& ENIC_SET_NAME
) &&
947 nla_put(skb
, IFLA_PORT_PROFILE
, PORT_PROFILE_MAX
, pp
->name
)) ||
948 ((pp
->set
& ENIC_SET_INSTANCE
) &&
949 nla_put(skb
, IFLA_PORT_INSTANCE_UUID
, PORT_UUID_MAX
,
950 pp
->instance_uuid
)) ||
951 ((pp
->set
& ENIC_SET_HOST
) &&
952 nla_put(skb
, IFLA_PORT_HOST_UUID
, PORT_UUID_MAX
, pp
->host_uuid
)))
953 goto nla_put_failure
;
960 static void enic_free_rq_buf(struct vnic_rq
*rq
, struct vnic_rq_buf
*buf
)
962 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
967 pci_unmap_single(enic
->pdev
, buf
->dma_addr
,
968 buf
->len
, PCI_DMA_FROMDEVICE
);
969 dev_kfree_skb_any(buf
->os_buf
);
973 static int enic_rq_alloc_buf(struct vnic_rq
*rq
)
975 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
976 struct net_device
*netdev
= enic
->netdev
;
978 unsigned int len
= netdev
->mtu
+ VLAN_ETH_HLEN
;
979 unsigned int os_buf_index
= 0;
981 struct vnic_rq_buf
*buf
= rq
->to_use
;
984 enic_queue_rq_desc(rq
, buf
->os_buf
, os_buf_index
, buf
->dma_addr
,
989 skb
= netdev_alloc_skb_ip_align(netdev
, len
);
993 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
, len
,
995 if (unlikely(enic_dma_map_check(enic
, dma_addr
))) {
1000 enic_queue_rq_desc(rq
, skb
, os_buf_index
,
1006 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter
*pkt_size
,
1009 if (ENIC_LARGE_PKT_THRESHOLD
<= pkt_len
)
1010 pkt_size
->large_pkt_bytes_cnt
+= pkt_len
;
1012 pkt_size
->small_pkt_bytes_cnt
+= pkt_len
;
1015 static bool enic_rxcopybreak(struct net_device
*netdev
, struct sk_buff
**skb
,
1016 struct vnic_rq_buf
*buf
, u16 len
)
1018 struct enic
*enic
= netdev_priv(netdev
);
1019 struct sk_buff
*new_skb
;
1021 if (len
> enic
->rx_copybreak
)
1023 new_skb
= netdev_alloc_skb_ip_align(netdev
, len
);
1026 pci_dma_sync_single_for_cpu(enic
->pdev
, buf
->dma_addr
, len
,
1028 memcpy(new_skb
->data
, (*skb
)->data
, len
);
1034 static void enic_rq_indicate_buf(struct vnic_rq
*rq
,
1035 struct cq_desc
*cq_desc
, struct vnic_rq_buf
*buf
,
1036 int skipped
, void *opaque
)
1038 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
1039 struct net_device
*netdev
= enic
->netdev
;
1040 struct sk_buff
*skb
;
1041 struct vnic_cq
*cq
= &enic
->cq
[enic_cq_rq(enic
, rq
->index
)];
1043 u8 type
, color
, eop
, sop
, ingress_port
, vlan_stripped
;
1044 u8 fcoe
, fcoe_sof
, fcoe_fc_crc_ok
, fcoe_enc_error
, fcoe_eof
;
1045 u8 tcp_udp_csum_ok
, udp
, tcp
, ipv4_csum_ok
;
1046 u8 ipv6
, ipv4
, ipv4_fragment
, fcs_ok
, rss_type
, csum_not_calc
;
1048 u16 q_number
, completed_index
, bytes_written
, vlan_tci
, checksum
;
1056 cq_enet_rq_desc_dec((struct cq_enet_rq_desc
*)cq_desc
,
1057 &type
, &color
, &q_number
, &completed_index
,
1058 &ingress_port
, &fcoe
, &eop
, &sop
, &rss_type
,
1059 &csum_not_calc
, &rss_hash
, &bytes_written
,
1060 &packet_error
, &vlan_stripped
, &vlan_tci
, &checksum
,
1061 &fcoe_sof
, &fcoe_fc_crc_ok
, &fcoe_enc_error
,
1062 &fcoe_eof
, &tcp_udp_csum_ok
, &udp
, &tcp
,
1063 &ipv4_csum_ok
, &ipv6
, &ipv4
, &ipv4_fragment
,
1069 if (bytes_written
> 0)
1071 else if (bytes_written
== 0)
1072 enic
->rq_truncated_pkts
++;
1075 pci_unmap_single(enic
->pdev
, buf
->dma_addr
, buf
->len
,
1076 PCI_DMA_FROMDEVICE
);
1077 dev_kfree_skb_any(skb
);
1083 if (eop
&& bytes_written
> 0) {
1088 if (!enic_rxcopybreak(netdev
, &skb
, buf
, bytes_written
)) {
1090 pci_unmap_single(enic
->pdev
, buf
->dma_addr
, buf
->len
,
1091 PCI_DMA_FROMDEVICE
);
1093 prefetch(skb
->data
- NET_IP_ALIGN
);
1095 skb_put(skb
, bytes_written
);
1096 skb
->protocol
= eth_type_trans(skb
, netdev
);
1097 skb_record_rx_queue(skb
, q_number
);
1098 if (netdev
->features
& NETIF_F_RXHASH
) {
1099 skb_set_hash(skb
, rss_hash
,
1101 (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX
|
1102 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6
|
1103 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4
)) ?
1104 PKT_HASH_TYPE_L4
: PKT_HASH_TYPE_L3
);
1107 /* Hardware does not provide whole packet checksum. It only
1108 * provides pseudo checksum. Since hw validates the packet
1109 * checksum but not provide us the checksum value. use
1110 * CHECSUM_UNNECESSARY.
1112 if ((netdev
->features
& NETIF_F_RXCSUM
) && tcp_udp_csum_ok
&&
1114 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1117 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vlan_tci
);
1119 skb_mark_napi_id(skb
, &enic
->napi
[rq
->index
]);
1120 if (enic_poll_busy_polling(rq
) ||
1121 !(netdev
->features
& NETIF_F_GRO
))
1122 netif_receive_skb(skb
);
1124 napi_gro_receive(&enic
->napi
[q_number
], skb
);
1125 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1126 enic_intr_update_pkt_size(&cq
->pkt_size_counter
,
1133 pci_unmap_single(enic
->pdev
, buf
->dma_addr
, buf
->len
,
1134 PCI_DMA_FROMDEVICE
);
1135 dev_kfree_skb_any(skb
);
1140 static int enic_rq_service(struct vnic_dev
*vdev
, struct cq_desc
*cq_desc
,
1141 u8 type
, u16 q_number
, u16 completed_index
, void *opaque
)
1143 struct enic
*enic
= vnic_dev_priv(vdev
);
1145 vnic_rq_service(&enic
->rq
[q_number
], cq_desc
,
1146 completed_index
, VNIC_RQ_RETURN_DESC
,
1147 enic_rq_indicate_buf
, opaque
);
1152 static int enic_poll(struct napi_struct
*napi
, int budget
)
1154 struct net_device
*netdev
= napi
->dev
;
1155 struct enic
*enic
= netdev_priv(netdev
);
1156 unsigned int cq_rq
= enic_cq_rq(enic
, 0);
1157 unsigned int cq_wq
= enic_cq_wq(enic
, 0);
1158 unsigned int intr
= enic_legacy_io_intr();
1159 unsigned int rq_work_to_do
= budget
;
1160 unsigned int wq_work_to_do
= -1; /* no limit */
1161 unsigned int work_done
, rq_work_done
= 0, wq_work_done
;
1164 wq_work_done
= vnic_cq_service(&enic
->cq
[cq_wq
], wq_work_to_do
,
1165 enic_wq_service
, NULL
);
1167 if (!enic_poll_lock_napi(&enic
->rq
[cq_rq
])) {
1168 if (wq_work_done
> 0)
1169 vnic_intr_return_credits(&enic
->intr
[intr
],
1171 0 /* dont unmask intr */,
1172 0 /* dont reset intr timer */);
1173 return rq_work_done
;
1177 rq_work_done
= vnic_cq_service(&enic
->cq
[cq_rq
],
1178 rq_work_to_do
, enic_rq_service
, NULL
);
1180 /* Accumulate intr event credits for this polling
1181 * cycle. An intr event is the completion of a
1182 * a WQ or RQ packet.
1185 work_done
= rq_work_done
+ wq_work_done
;
1188 vnic_intr_return_credits(&enic
->intr
[intr
],
1190 0 /* don't unmask intr */,
1191 0 /* don't reset intr timer */);
1193 err
= vnic_rq_fill(&enic
->rq
[0], enic_rq_alloc_buf
);
1195 /* Buffer allocation failed. Stay in polling
1196 * mode so we can try to fill the ring again.
1200 rq_work_done
= rq_work_to_do
;
1202 if (rq_work_done
< rq_work_to_do
) {
1204 /* Some work done, but not enough to stay in polling,
1208 napi_complete(napi
);
1209 vnic_intr_unmask(&enic
->intr
[intr
]);
1211 enic_poll_unlock_napi(&enic
->rq
[cq_rq
], napi
);
1213 return rq_work_done
;
1216 static void enic_set_int_moderation(struct enic
*enic
, struct vnic_rq
*rq
)
1218 unsigned int intr
= enic_msix_rq_intr(enic
, rq
->index
);
1219 struct vnic_cq
*cq
= &enic
->cq
[enic_cq_rq(enic
, rq
->index
)];
1220 u32 timer
= cq
->tobe_rx_coal_timeval
;
1222 if (cq
->tobe_rx_coal_timeval
!= cq
->cur_rx_coal_timeval
) {
1223 vnic_intr_coalescing_timer_set(&enic
->intr
[intr
], timer
);
1224 cq
->cur_rx_coal_timeval
= cq
->tobe_rx_coal_timeval
;
1228 static void enic_calc_int_moderation(struct enic
*enic
, struct vnic_rq
*rq
)
1230 struct enic_rx_coal
*rx_coal
= &enic
->rx_coalesce_setting
;
1231 struct vnic_cq
*cq
= &enic
->cq
[enic_cq_rq(enic
, rq
->index
)];
1232 struct vnic_rx_bytes_counter
*pkt_size_counter
= &cq
->pkt_size_counter
;
1238 ktime_t now
= ktime_get();
1240 delta
= ktime_us_delta(now
, cq
->prev_ts
);
1241 if (delta
< ENIC_AIC_TS_BREAK
)
1245 traffic
= pkt_size_counter
->large_pkt_bytes_cnt
+
1246 pkt_size_counter
->small_pkt_bytes_cnt
;
1247 /* The table takes Mbps
1248 * traffic *= 8 => bits
1249 * traffic *= (10^6 / delta) => bps
1250 * traffic /= 10^6 => Mbps
1252 * Combining, traffic *= (8 / delta)
1256 traffic
= delta
> UINT_MAX
? 0 : traffic
/ (u32
)delta
;
1258 for (index
= 0; index
< ENIC_MAX_COALESCE_TIMERS
; index
++)
1259 if (traffic
< mod_table
[index
].rx_rate
)
1261 range_start
= (pkt_size_counter
->small_pkt_bytes_cnt
>
1262 pkt_size_counter
->large_pkt_bytes_cnt
<< 1) ?
1263 rx_coal
->small_pkt_range_start
:
1264 rx_coal
->large_pkt_range_start
;
1265 timer
= range_start
+ ((rx_coal
->range_end
- range_start
) *
1266 mod_table
[index
].range_percent
/ 100);
1268 cq
->tobe_rx_coal_timeval
= (timer
+ cq
->tobe_rx_coal_timeval
) >> 1;
1270 pkt_size_counter
->large_pkt_bytes_cnt
= 0;
1271 pkt_size_counter
->small_pkt_bytes_cnt
= 0;
1274 #ifdef CONFIG_RFS_ACCEL
1275 static void enic_free_rx_cpu_rmap(struct enic
*enic
)
1277 free_irq_cpu_rmap(enic
->netdev
->rx_cpu_rmap
);
1278 enic
->netdev
->rx_cpu_rmap
= NULL
;
1281 static void enic_set_rx_cpu_rmap(struct enic
*enic
)
1285 if (vnic_dev_get_intr_mode(enic
->vdev
) == VNIC_DEV_INTR_MODE_MSIX
) {
1286 enic
->netdev
->rx_cpu_rmap
= alloc_irq_cpu_rmap(enic
->rq_count
);
1287 if (unlikely(!enic
->netdev
->rx_cpu_rmap
))
1289 for (i
= 0; i
< enic
->rq_count
; i
++) {
1290 res
= irq_cpu_rmap_add(enic
->netdev
->rx_cpu_rmap
,
1291 enic
->msix_entry
[i
].vector
);
1292 if (unlikely(res
)) {
1293 enic_free_rx_cpu_rmap(enic
);
1302 static void enic_free_rx_cpu_rmap(struct enic
*enic
)
1306 static void enic_set_rx_cpu_rmap(struct enic
*enic
)
1310 #endif /* CONFIG_RFS_ACCEL */
1312 #ifdef CONFIG_NET_RX_BUSY_POLL
1313 static int enic_busy_poll(struct napi_struct
*napi
)
1315 struct net_device
*netdev
= napi
->dev
;
1316 struct enic
*enic
= netdev_priv(netdev
);
1317 unsigned int rq
= (napi
- &enic
->napi
[0]);
1318 unsigned int cq
= enic_cq_rq(enic
, rq
);
1319 unsigned int intr
= enic_msix_rq_intr(enic
, rq
);
1320 unsigned int work_to_do
= -1; /* clean all pkts possible */
1321 unsigned int work_done
;
1323 if (!enic_poll_lock_poll(&enic
->rq
[rq
]))
1324 return LL_FLUSH_BUSY
;
1325 work_done
= vnic_cq_service(&enic
->cq
[cq
], work_to_do
,
1326 enic_rq_service
, NULL
);
1329 vnic_intr_return_credits(&enic
->intr
[intr
],
1331 vnic_rq_fill(&enic
->rq
[rq
], enic_rq_alloc_buf
);
1332 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1333 enic_calc_int_moderation(enic
, &enic
->rq
[rq
]);
1334 enic_poll_unlock_poll(&enic
->rq
[rq
]);
1338 #endif /* CONFIG_NET_RX_BUSY_POLL */
1340 static int enic_poll_msix_wq(struct napi_struct
*napi
, int budget
)
1342 struct net_device
*netdev
= napi
->dev
;
1343 struct enic
*enic
= netdev_priv(netdev
);
1344 unsigned int wq_index
= (napi
- &enic
->napi
[0]) - enic
->rq_count
;
1345 struct vnic_wq
*wq
= &enic
->wq
[wq_index
];
1348 unsigned int wq_work_to_do
= -1; /* clean all desc possible */
1349 unsigned int wq_work_done
;
1350 unsigned int wq_irq
;
1353 cq
= enic_cq_wq(enic
, wq_irq
);
1354 intr
= enic_msix_wq_intr(enic
, wq_irq
);
1355 wq_work_done
= vnic_cq_service(&enic
->cq
[cq
], wq_work_to_do
,
1356 enic_wq_service
, NULL
);
1358 vnic_intr_return_credits(&enic
->intr
[intr
], wq_work_done
,
1359 0 /* don't unmask intr */,
1360 1 /* reset intr timer */);
1361 if (!wq_work_done
) {
1362 napi_complete(napi
);
1363 vnic_intr_unmask(&enic
->intr
[intr
]);
1370 static int enic_poll_msix_rq(struct napi_struct
*napi
, int budget
)
1372 struct net_device
*netdev
= napi
->dev
;
1373 struct enic
*enic
= netdev_priv(netdev
);
1374 unsigned int rq
= (napi
- &enic
->napi
[0]);
1375 unsigned int cq
= enic_cq_rq(enic
, rq
);
1376 unsigned int intr
= enic_msix_rq_intr(enic
, rq
);
1377 unsigned int work_to_do
= budget
;
1378 unsigned int work_done
= 0;
1381 if (!enic_poll_lock_napi(&enic
->rq
[rq
]))
1387 work_done
= vnic_cq_service(&enic
->cq
[cq
],
1388 work_to_do
, enic_rq_service
, NULL
);
1390 /* Return intr event credits for this polling
1391 * cycle. An intr event is the completion of a
1396 vnic_intr_return_credits(&enic
->intr
[intr
],
1398 0 /* don't unmask intr */,
1399 0 /* don't reset intr timer */);
1401 err
= vnic_rq_fill(&enic
->rq
[rq
], enic_rq_alloc_buf
);
1403 /* Buffer allocation failed. Stay in polling mode
1404 * so we can try to fill the ring again.
1408 work_done
= work_to_do
;
1409 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1410 /* Call the function which refreshes
1411 * the intr coalescing timer value based on
1412 * the traffic. This is supported only in
1413 * the case of MSI-x mode
1415 enic_calc_int_moderation(enic
, &enic
->rq
[rq
]);
1417 enic_poll_unlock_napi(&enic
->rq
[rq
], napi
);
1418 if (work_done
< work_to_do
) {
1420 /* Some work done, but not enough to stay in polling,
1424 napi_complete(napi
);
1425 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1426 enic_set_int_moderation(enic
, &enic
->rq
[rq
]);
1427 vnic_intr_unmask(&enic
->intr
[intr
]);
1433 static void enic_notify_timer(unsigned long data
)
1435 struct enic
*enic
= (struct enic
*)data
;
1437 enic_notify_check(enic
);
1439 mod_timer(&enic
->notify_timer
,
1440 round_jiffies(jiffies
+ ENIC_NOTIFY_TIMER_PERIOD
));
1443 static void enic_free_intr(struct enic
*enic
)
1445 struct net_device
*netdev
= enic
->netdev
;
1448 enic_free_rx_cpu_rmap(enic
);
1449 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1450 case VNIC_DEV_INTR_MODE_INTX
:
1451 free_irq(enic
->pdev
->irq
, netdev
);
1453 case VNIC_DEV_INTR_MODE_MSI
:
1454 free_irq(enic
->pdev
->irq
, enic
);
1456 case VNIC_DEV_INTR_MODE_MSIX
:
1457 for (i
= 0; i
< ARRAY_SIZE(enic
->msix
); i
++)
1458 if (enic
->msix
[i
].requested
)
1459 free_irq(enic
->msix_entry
[i
].vector
,
1460 enic
->msix
[i
].devid
);
1467 static int enic_request_intr(struct enic
*enic
)
1469 struct net_device
*netdev
= enic
->netdev
;
1470 unsigned int i
, intr
;
1473 enic_set_rx_cpu_rmap(enic
);
1474 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1476 case VNIC_DEV_INTR_MODE_INTX
:
1478 err
= request_irq(enic
->pdev
->irq
, enic_isr_legacy
,
1479 IRQF_SHARED
, netdev
->name
, netdev
);
1482 case VNIC_DEV_INTR_MODE_MSI
:
1484 err
= request_irq(enic
->pdev
->irq
, enic_isr_msi
,
1485 0, netdev
->name
, enic
);
1488 case VNIC_DEV_INTR_MODE_MSIX
:
1490 for (i
= 0; i
< enic
->rq_count
; i
++) {
1491 intr
= enic_msix_rq_intr(enic
, i
);
1492 snprintf(enic
->msix
[intr
].devname
,
1493 sizeof(enic
->msix
[intr
].devname
),
1494 "%.11s-rx-%d", netdev
->name
, i
);
1495 enic
->msix
[intr
].isr
= enic_isr_msix
;
1496 enic
->msix
[intr
].devid
= &enic
->napi
[i
];
1499 for (i
= 0; i
< enic
->wq_count
; i
++) {
1500 int wq
= enic_cq_wq(enic
, i
);
1502 intr
= enic_msix_wq_intr(enic
, i
);
1503 snprintf(enic
->msix
[intr
].devname
,
1504 sizeof(enic
->msix
[intr
].devname
),
1505 "%.11s-tx-%d", netdev
->name
, i
);
1506 enic
->msix
[intr
].isr
= enic_isr_msix
;
1507 enic
->msix
[intr
].devid
= &enic
->napi
[wq
];
1510 intr
= enic_msix_err_intr(enic
);
1511 snprintf(enic
->msix
[intr
].devname
,
1512 sizeof(enic
->msix
[intr
].devname
),
1513 "%.11s-err", netdev
->name
);
1514 enic
->msix
[intr
].isr
= enic_isr_msix_err
;
1515 enic
->msix
[intr
].devid
= enic
;
1517 intr
= enic_msix_notify_intr(enic
);
1518 snprintf(enic
->msix
[intr
].devname
,
1519 sizeof(enic
->msix
[intr
].devname
),
1520 "%.11s-notify", netdev
->name
);
1521 enic
->msix
[intr
].isr
= enic_isr_msix_notify
;
1522 enic
->msix
[intr
].devid
= enic
;
1524 for (i
= 0; i
< ARRAY_SIZE(enic
->msix
); i
++)
1525 enic
->msix
[i
].requested
= 0;
1527 for (i
= 0; i
< enic
->intr_count
; i
++) {
1528 err
= request_irq(enic
->msix_entry
[i
].vector
,
1529 enic
->msix
[i
].isr
, 0,
1530 enic
->msix
[i
].devname
,
1531 enic
->msix
[i
].devid
);
1533 enic_free_intr(enic
);
1536 enic
->msix
[i
].requested
= 1;
1548 static void enic_synchronize_irqs(struct enic
*enic
)
1552 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1553 case VNIC_DEV_INTR_MODE_INTX
:
1554 case VNIC_DEV_INTR_MODE_MSI
:
1555 synchronize_irq(enic
->pdev
->irq
);
1557 case VNIC_DEV_INTR_MODE_MSIX
:
1558 for (i
= 0; i
< enic
->intr_count
; i
++)
1559 synchronize_irq(enic
->msix_entry
[i
].vector
);
1566 static void enic_set_rx_coal_setting(struct enic
*enic
)
1570 struct enic_rx_coal
*rx_coal
= &enic
->rx_coalesce_setting
;
1572 /* If intr mode is not MSIX, do not do adaptive coalescing */
1573 if (VNIC_DEV_INTR_MODE_MSIX
!= vnic_dev_get_intr_mode(enic
->vdev
)) {
1574 netdev_info(enic
->netdev
, "INTR mode is not MSIX, Not initializing adaptive coalescing");
1578 /* 1. Read the link speed from fw
1579 * 2. Pick the default range for the speed
1580 * 3. Update it in enic->rx_coalesce_setting
1582 speed
= vnic_dev_port_speed(enic
->vdev
);
1583 if (ENIC_LINK_SPEED_10G
< speed
)
1584 index
= ENIC_LINK_40G_INDEX
;
1585 else if (ENIC_LINK_SPEED_4G
< speed
)
1586 index
= ENIC_LINK_10G_INDEX
;
1588 index
= ENIC_LINK_4G_INDEX
;
1590 rx_coal
->small_pkt_range_start
= mod_range
[index
].small_pkt_range_start
;
1591 rx_coal
->large_pkt_range_start
= mod_range
[index
].large_pkt_range_start
;
1592 rx_coal
->range_end
= ENIC_RX_COALESCE_RANGE_END
;
1594 /* Start with the value provided by UCSM */
1595 for (index
= 0; index
< enic
->rq_count
; index
++)
1596 enic
->cq
[index
].cur_rx_coal_timeval
=
1597 enic
->config
.intr_timer_usec
;
1599 rx_coal
->use_adaptive_rx_coalesce
= 1;
1602 static int enic_dev_notify_set(struct enic
*enic
)
1606 spin_lock_bh(&enic
->devcmd_lock
);
1607 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1608 case VNIC_DEV_INTR_MODE_INTX
:
1609 err
= vnic_dev_notify_set(enic
->vdev
,
1610 enic_legacy_notify_intr());
1612 case VNIC_DEV_INTR_MODE_MSIX
:
1613 err
= vnic_dev_notify_set(enic
->vdev
,
1614 enic_msix_notify_intr(enic
));
1617 err
= vnic_dev_notify_set(enic
->vdev
, -1 /* no intr */);
1620 spin_unlock_bh(&enic
->devcmd_lock
);
1625 static void enic_notify_timer_start(struct enic
*enic
)
1627 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1628 case VNIC_DEV_INTR_MODE_MSI
:
1629 mod_timer(&enic
->notify_timer
, jiffies
);
1632 /* Using intr for notification for INTx/MSI-X */
1637 /* rtnl lock is held, process context */
1638 static int enic_open(struct net_device
*netdev
)
1640 struct enic
*enic
= netdev_priv(netdev
);
1644 err
= enic_request_intr(enic
);
1646 netdev_err(netdev
, "Unable to request irq.\n");
1650 err
= enic_dev_notify_set(enic
);
1653 "Failed to alloc notify buffer, aborting.\n");
1654 goto err_out_free_intr
;
1657 for (i
= 0; i
< enic
->rq_count
; i
++) {
1658 vnic_rq_fill(&enic
->rq
[i
], enic_rq_alloc_buf
);
1659 /* Need at least one buffer on ring to get going */
1660 if (vnic_rq_desc_used(&enic
->rq
[i
]) == 0) {
1661 netdev_err(netdev
, "Unable to alloc receive buffers\n");
1663 goto err_out_free_rq
;
1667 for (i
= 0; i
< enic
->wq_count
; i
++)
1668 vnic_wq_enable(&enic
->wq
[i
]);
1669 for (i
= 0; i
< enic
->rq_count
; i
++)
1670 vnic_rq_enable(&enic
->rq
[i
]);
1672 if (!enic_is_dynamic(enic
) && !enic_is_sriov_vf(enic
))
1673 enic_dev_add_station_addr(enic
);
1675 enic_set_rx_mode(netdev
);
1677 netif_tx_wake_all_queues(netdev
);
1679 for (i
= 0; i
< enic
->rq_count
; i
++) {
1680 enic_busy_poll_init_lock(&enic
->rq
[i
]);
1681 napi_enable(&enic
->napi
[i
]);
1683 if (vnic_dev_get_intr_mode(enic
->vdev
) == VNIC_DEV_INTR_MODE_MSIX
)
1684 for (i
= 0; i
< enic
->wq_count
; i
++)
1685 napi_enable(&enic
->napi
[enic_cq_wq(enic
, i
)]);
1686 enic_dev_enable(enic
);
1688 for (i
= 0; i
< enic
->intr_count
; i
++)
1689 vnic_intr_unmask(&enic
->intr
[i
]);
1691 enic_notify_timer_start(enic
);
1692 enic_rfs_flw_tbl_init(enic
);
1697 for (i
= 0; i
< enic
->rq_count
; i
++)
1698 vnic_rq_clean(&enic
->rq
[i
], enic_free_rq_buf
);
1699 enic_dev_notify_unset(enic
);
1701 enic_free_intr(enic
);
1706 /* rtnl lock is held, process context */
1707 static int enic_stop(struct net_device
*netdev
)
1709 struct enic
*enic
= netdev_priv(netdev
);
1713 for (i
= 0; i
< enic
->intr_count
; i
++) {
1714 vnic_intr_mask(&enic
->intr
[i
]);
1715 (void)vnic_intr_masked(&enic
->intr
[i
]); /* flush write */
1718 enic_synchronize_irqs(enic
);
1720 del_timer_sync(&enic
->notify_timer
);
1721 enic_rfs_flw_tbl_free(enic
);
1723 enic_dev_disable(enic
);
1725 for (i
= 0; i
< enic
->rq_count
; i
++) {
1726 napi_disable(&enic
->napi
[i
]);
1728 while (!enic_poll_lock_napi(&enic
->rq
[i
]))
1733 netif_carrier_off(netdev
);
1734 netif_tx_disable(netdev
);
1735 if (vnic_dev_get_intr_mode(enic
->vdev
) == VNIC_DEV_INTR_MODE_MSIX
)
1736 for (i
= 0; i
< enic
->wq_count
; i
++)
1737 napi_disable(&enic
->napi
[enic_cq_wq(enic
, i
)]);
1739 if (!enic_is_dynamic(enic
) && !enic_is_sriov_vf(enic
))
1740 enic_dev_del_station_addr(enic
);
1742 for (i
= 0; i
< enic
->wq_count
; i
++) {
1743 err
= vnic_wq_disable(&enic
->wq
[i
]);
1747 for (i
= 0; i
< enic
->rq_count
; i
++) {
1748 err
= vnic_rq_disable(&enic
->rq
[i
]);
1753 enic_dev_notify_unset(enic
);
1754 enic_free_intr(enic
);
1756 for (i
= 0; i
< enic
->wq_count
; i
++)
1757 vnic_wq_clean(&enic
->wq
[i
], enic_free_wq_buf
);
1758 for (i
= 0; i
< enic
->rq_count
; i
++)
1759 vnic_rq_clean(&enic
->rq
[i
], enic_free_rq_buf
);
1760 for (i
= 0; i
< enic
->cq_count
; i
++)
1761 vnic_cq_clean(&enic
->cq
[i
]);
1762 for (i
= 0; i
< enic
->intr_count
; i
++)
1763 vnic_intr_clean(&enic
->intr
[i
]);
1768 static int enic_change_mtu(struct net_device
*netdev
, int new_mtu
)
1770 struct enic
*enic
= netdev_priv(netdev
);
1771 int running
= netif_running(netdev
);
1773 if (new_mtu
< ENIC_MIN_MTU
|| new_mtu
> ENIC_MAX_MTU
)
1776 if (enic_is_dynamic(enic
) || enic_is_sriov_vf(enic
))
1782 netdev
->mtu
= new_mtu
;
1784 if (netdev
->mtu
> enic
->port_mtu
)
1786 "interface MTU (%d) set higher than port MTU (%d)\n",
1787 netdev
->mtu
, enic
->port_mtu
);
1795 static void enic_change_mtu_work(struct work_struct
*work
)
1797 struct enic
*enic
= container_of(work
, struct enic
, change_mtu_work
);
1798 struct net_device
*netdev
= enic
->netdev
;
1799 int new_mtu
= vnic_dev_mtu(enic
->vdev
);
1803 new_mtu
= max_t(int, ENIC_MIN_MTU
, min_t(int, ENIC_MAX_MTU
, new_mtu
));
1808 del_timer_sync(&enic
->notify_timer
);
1810 for (i
= 0; i
< enic
->rq_count
; i
++)
1811 napi_disable(&enic
->napi
[i
]);
1813 vnic_intr_mask(&enic
->intr
[0]);
1814 enic_synchronize_irqs(enic
);
1815 err
= vnic_rq_disable(&enic
->rq
[0]);
1818 netdev_err(netdev
, "Unable to disable RQ.\n");
1821 vnic_rq_clean(&enic
->rq
[0], enic_free_rq_buf
);
1822 vnic_cq_clean(&enic
->cq
[0]);
1823 vnic_intr_clean(&enic
->intr
[0]);
1825 /* Fill RQ with new_mtu-sized buffers */
1826 netdev
->mtu
= new_mtu
;
1827 vnic_rq_fill(&enic
->rq
[0], enic_rq_alloc_buf
);
1828 /* Need at least one buffer on ring to get going */
1829 if (vnic_rq_desc_used(&enic
->rq
[0]) == 0) {
1831 netdev_err(netdev
, "Unable to alloc receive buffers.\n");
1836 vnic_rq_enable(&enic
->rq
[0]);
1837 napi_enable(&enic
->napi
[0]);
1838 vnic_intr_unmask(&enic
->intr
[0]);
1839 enic_notify_timer_start(enic
);
1843 netdev_info(netdev
, "interface MTU set as %d\n", netdev
->mtu
);
1846 #ifdef CONFIG_NET_POLL_CONTROLLER
1847 static void enic_poll_controller(struct net_device
*netdev
)
1849 struct enic
*enic
= netdev_priv(netdev
);
1850 struct vnic_dev
*vdev
= enic
->vdev
;
1851 unsigned int i
, intr
;
1853 switch (vnic_dev_get_intr_mode(vdev
)) {
1854 case VNIC_DEV_INTR_MODE_MSIX
:
1855 for (i
= 0; i
< enic
->rq_count
; i
++) {
1856 intr
= enic_msix_rq_intr(enic
, i
);
1857 enic_isr_msix(enic
->msix_entry
[intr
].vector
,
1861 for (i
= 0; i
< enic
->wq_count
; i
++) {
1862 intr
= enic_msix_wq_intr(enic
, i
);
1863 enic_isr_msix(enic
->msix_entry
[intr
].vector
,
1864 &enic
->napi
[enic_cq_wq(enic
, i
)]);
1868 case VNIC_DEV_INTR_MODE_MSI
:
1869 enic_isr_msi(enic
->pdev
->irq
, enic
);
1871 case VNIC_DEV_INTR_MODE_INTX
:
1872 enic_isr_legacy(enic
->pdev
->irq
, netdev
);
1880 static int enic_dev_wait(struct vnic_dev
*vdev
,
1881 int (*start
)(struct vnic_dev
*, int),
1882 int (*finished
)(struct vnic_dev
*, int *),
1889 BUG_ON(in_interrupt());
1891 err
= start(vdev
, arg
);
1895 /* Wait for func to complete...2 seconds max
1898 time
= jiffies
+ (HZ
* 2);
1901 err
= finished(vdev
, &done
);
1908 schedule_timeout_uninterruptible(HZ
/ 10);
1910 } while (time_after(time
, jiffies
));
1915 static int enic_dev_open(struct enic
*enic
)
1919 err
= enic_dev_wait(enic
->vdev
, vnic_dev_open
,
1920 vnic_dev_open_done
, 0);
1922 dev_err(enic_get_dev(enic
), "vNIC device open failed, err %d\n",
1928 static int enic_dev_hang_reset(struct enic
*enic
)
1932 err
= enic_dev_wait(enic
->vdev
, vnic_dev_hang_reset
,
1933 vnic_dev_hang_reset_done
, 0);
1935 netdev_err(enic
->netdev
, "vNIC hang reset failed, err %d\n",
1941 int __enic_set_rsskey(struct enic
*enic
)
1943 union vnic_rss_key
*rss_key_buf_va
;
1944 dma_addr_t rss_key_buf_pa
;
1945 int i
, kidx
, bidx
, err
;
1947 rss_key_buf_va
= pci_zalloc_consistent(enic
->pdev
,
1948 sizeof(union vnic_rss_key
),
1950 if (!rss_key_buf_va
)
1953 for (i
= 0; i
< ENIC_RSS_LEN
; i
++) {
1954 kidx
= i
/ ENIC_RSS_BYTES_PER_KEY
;
1955 bidx
= i
% ENIC_RSS_BYTES_PER_KEY
;
1956 rss_key_buf_va
->key
[kidx
].b
[bidx
] = enic
->rss_key
[i
];
1958 spin_lock_bh(&enic
->devcmd_lock
);
1959 err
= enic_set_rss_key(enic
,
1961 sizeof(union vnic_rss_key
));
1962 spin_unlock_bh(&enic
->devcmd_lock
);
1964 pci_free_consistent(enic
->pdev
, sizeof(union vnic_rss_key
),
1965 rss_key_buf_va
, rss_key_buf_pa
);
1970 static int enic_set_rsskey(struct enic
*enic
)
1972 netdev_rss_key_fill(enic
->rss_key
, ENIC_RSS_LEN
);
1974 return __enic_set_rsskey(enic
);
1977 static int enic_set_rsscpu(struct enic
*enic
, u8 rss_hash_bits
)
1979 dma_addr_t rss_cpu_buf_pa
;
1980 union vnic_rss_cpu
*rss_cpu_buf_va
= NULL
;
1984 rss_cpu_buf_va
= pci_alloc_consistent(enic
->pdev
,
1985 sizeof(union vnic_rss_cpu
), &rss_cpu_buf_pa
);
1986 if (!rss_cpu_buf_va
)
1989 for (i
= 0; i
< (1 << rss_hash_bits
); i
++)
1990 (*rss_cpu_buf_va
).cpu
[i
/4].b
[i
%4] = i
% enic
->rq_count
;
1992 spin_lock_bh(&enic
->devcmd_lock
);
1993 err
= enic_set_rss_cpu(enic
,
1995 sizeof(union vnic_rss_cpu
));
1996 spin_unlock_bh(&enic
->devcmd_lock
);
1998 pci_free_consistent(enic
->pdev
, sizeof(union vnic_rss_cpu
),
1999 rss_cpu_buf_va
, rss_cpu_buf_pa
);
2004 static int enic_set_niccfg(struct enic
*enic
, u8 rss_default_cpu
,
2005 u8 rss_hash_type
, u8 rss_hash_bits
, u8 rss_base_cpu
, u8 rss_enable
)
2007 const u8 tso_ipid_split_en
= 0;
2008 const u8 ig_vlan_strip_en
= 1;
2011 /* Enable VLAN tag stripping.
2014 spin_lock_bh(&enic
->devcmd_lock
);
2015 err
= enic_set_nic_cfg(enic
,
2016 rss_default_cpu
, rss_hash_type
,
2017 rss_hash_bits
, rss_base_cpu
,
2018 rss_enable
, tso_ipid_split_en
,
2020 spin_unlock_bh(&enic
->devcmd_lock
);
2025 static int enic_set_rss_nic_cfg(struct enic
*enic
)
2027 struct device
*dev
= enic_get_dev(enic
);
2028 const u8 rss_default_cpu
= 0;
2029 const u8 rss_hash_type
= NIC_CFG_RSS_HASH_TYPE_IPV4
|
2030 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4
|
2031 NIC_CFG_RSS_HASH_TYPE_IPV6
|
2032 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6
;
2033 const u8 rss_hash_bits
= 7;
2034 const u8 rss_base_cpu
= 0;
2035 u8 rss_enable
= ENIC_SETTING(enic
, RSS
) && (enic
->rq_count
> 1);
2038 if (!enic_set_rsskey(enic
)) {
2039 if (enic_set_rsscpu(enic
, rss_hash_bits
)) {
2041 dev_warn(dev
, "RSS disabled, "
2042 "Failed to set RSS cpu indirection table.");
2046 dev_warn(dev
, "RSS disabled, Failed to set RSS key.\n");
2050 return enic_set_niccfg(enic
, rss_default_cpu
, rss_hash_type
,
2051 rss_hash_bits
, rss_base_cpu
, rss_enable
);
2054 static void enic_reset(struct work_struct
*work
)
2056 struct enic
*enic
= container_of(work
, struct enic
, reset
);
2058 if (!netif_running(enic
->netdev
))
2063 spin_lock(&enic
->enic_api_lock
);
2064 enic_dev_hang_notify(enic
);
2065 enic_stop(enic
->netdev
);
2066 enic_dev_hang_reset(enic
);
2067 enic_reset_addr_lists(enic
);
2068 enic_init_vnic_resources(enic
);
2069 enic_set_rss_nic_cfg(enic
);
2070 enic_dev_set_ig_vlan_rewrite_mode(enic
);
2071 enic_open(enic
->netdev
);
2072 spin_unlock(&enic
->enic_api_lock
);
2073 call_netdevice_notifiers(NETDEV_REBOOT
, enic
->netdev
);
2078 static int enic_set_intr_mode(struct enic
*enic
)
2080 unsigned int n
= min_t(unsigned int, enic
->rq_count
, ENIC_RQ_MAX
);
2081 unsigned int m
= min_t(unsigned int, enic
->wq_count
, ENIC_WQ_MAX
);
2084 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2085 * on system capabilities.
2089 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2090 * (the second to last INTR is used for WQ/RQ errors)
2091 * (the last INTR is used for notifications)
2094 BUG_ON(ARRAY_SIZE(enic
->msix_entry
) < n
+ m
+ 2);
2095 for (i
= 0; i
< n
+ m
+ 2; i
++)
2096 enic
->msix_entry
[i
].entry
= i
;
2098 /* Use multiple RQs if RSS is enabled
2101 if (ENIC_SETTING(enic
, RSS
) &&
2102 enic
->config
.intr_mode
< 1 &&
2103 enic
->rq_count
>= n
&&
2104 enic
->wq_count
>= m
&&
2105 enic
->cq_count
>= n
+ m
&&
2106 enic
->intr_count
>= n
+ m
+ 2) {
2108 if (pci_enable_msix_range(enic
->pdev
, enic
->msix_entry
,
2109 n
+ m
+ 2, n
+ m
+ 2) > 0) {
2113 enic
->cq_count
= n
+ m
;
2114 enic
->intr_count
= n
+ m
+ 2;
2116 vnic_dev_set_intr_mode(enic
->vdev
,
2117 VNIC_DEV_INTR_MODE_MSIX
);
2123 if (enic
->config
.intr_mode
< 1 &&
2124 enic
->rq_count
>= 1 &&
2125 enic
->wq_count
>= m
&&
2126 enic
->cq_count
>= 1 + m
&&
2127 enic
->intr_count
>= 1 + m
+ 2) {
2128 if (pci_enable_msix_range(enic
->pdev
, enic
->msix_entry
,
2129 1 + m
+ 2, 1 + m
+ 2) > 0) {
2133 enic
->cq_count
= 1 + m
;
2134 enic
->intr_count
= 1 + m
+ 2;
2136 vnic_dev_set_intr_mode(enic
->vdev
,
2137 VNIC_DEV_INTR_MODE_MSIX
);
2145 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2148 if (enic
->config
.intr_mode
< 2 &&
2149 enic
->rq_count
>= 1 &&
2150 enic
->wq_count
>= 1 &&
2151 enic
->cq_count
>= 2 &&
2152 enic
->intr_count
>= 1 &&
2153 !pci_enable_msi(enic
->pdev
)) {
2158 enic
->intr_count
= 1;
2160 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_MSI
);
2167 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2168 * (the first INTR is used for WQ/RQ)
2169 * (the second INTR is used for WQ/RQ errors)
2170 * (the last INTR is used for notifications)
2173 if (enic
->config
.intr_mode
< 3 &&
2174 enic
->rq_count
>= 1 &&
2175 enic
->wq_count
>= 1 &&
2176 enic
->cq_count
>= 2 &&
2177 enic
->intr_count
>= 3) {
2182 enic
->intr_count
= 3;
2184 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_INTX
);
2189 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_UNKNOWN
);
2194 static void enic_clear_intr_mode(struct enic
*enic
)
2196 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
2197 case VNIC_DEV_INTR_MODE_MSIX
:
2198 pci_disable_msix(enic
->pdev
);
2200 case VNIC_DEV_INTR_MODE_MSI
:
2201 pci_disable_msi(enic
->pdev
);
2207 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_UNKNOWN
);
2210 static const struct net_device_ops enic_netdev_dynamic_ops
= {
2211 .ndo_open
= enic_open
,
2212 .ndo_stop
= enic_stop
,
2213 .ndo_start_xmit
= enic_hard_start_xmit
,
2214 .ndo_get_stats64
= enic_get_stats
,
2215 .ndo_validate_addr
= eth_validate_addr
,
2216 .ndo_set_rx_mode
= enic_set_rx_mode
,
2217 .ndo_set_mac_address
= enic_set_mac_address_dynamic
,
2218 .ndo_change_mtu
= enic_change_mtu
,
2219 .ndo_vlan_rx_add_vid
= enic_vlan_rx_add_vid
,
2220 .ndo_vlan_rx_kill_vid
= enic_vlan_rx_kill_vid
,
2221 .ndo_tx_timeout
= enic_tx_timeout
,
2222 .ndo_set_vf_port
= enic_set_vf_port
,
2223 .ndo_get_vf_port
= enic_get_vf_port
,
2224 .ndo_set_vf_mac
= enic_set_vf_mac
,
2225 #ifdef CONFIG_NET_POLL_CONTROLLER
2226 .ndo_poll_controller
= enic_poll_controller
,
2228 #ifdef CONFIG_RFS_ACCEL
2229 .ndo_rx_flow_steer
= enic_rx_flow_steer
,
2231 #ifdef CONFIG_NET_RX_BUSY_POLL
2232 .ndo_busy_poll
= enic_busy_poll
,
2236 static const struct net_device_ops enic_netdev_ops
= {
2237 .ndo_open
= enic_open
,
2238 .ndo_stop
= enic_stop
,
2239 .ndo_start_xmit
= enic_hard_start_xmit
,
2240 .ndo_get_stats64
= enic_get_stats
,
2241 .ndo_validate_addr
= eth_validate_addr
,
2242 .ndo_set_mac_address
= enic_set_mac_address
,
2243 .ndo_set_rx_mode
= enic_set_rx_mode
,
2244 .ndo_change_mtu
= enic_change_mtu
,
2245 .ndo_vlan_rx_add_vid
= enic_vlan_rx_add_vid
,
2246 .ndo_vlan_rx_kill_vid
= enic_vlan_rx_kill_vid
,
2247 .ndo_tx_timeout
= enic_tx_timeout
,
2248 .ndo_set_vf_port
= enic_set_vf_port
,
2249 .ndo_get_vf_port
= enic_get_vf_port
,
2250 .ndo_set_vf_mac
= enic_set_vf_mac
,
2251 #ifdef CONFIG_NET_POLL_CONTROLLER
2252 .ndo_poll_controller
= enic_poll_controller
,
2254 #ifdef CONFIG_RFS_ACCEL
2255 .ndo_rx_flow_steer
= enic_rx_flow_steer
,
2257 #ifdef CONFIG_NET_RX_BUSY_POLL
2258 .ndo_busy_poll
= enic_busy_poll
,
2262 static void enic_dev_deinit(struct enic
*enic
)
2266 for (i
= 0; i
< enic
->rq_count
; i
++) {
2267 napi_hash_del(&enic
->napi
[i
]);
2268 netif_napi_del(&enic
->napi
[i
]);
2270 if (vnic_dev_get_intr_mode(enic
->vdev
) == VNIC_DEV_INTR_MODE_MSIX
)
2271 for (i
= 0; i
< enic
->wq_count
; i
++)
2272 netif_napi_del(&enic
->napi
[enic_cq_wq(enic
, i
)]);
2274 enic_free_vnic_resources(enic
);
2275 enic_clear_intr_mode(enic
);
2278 static void enic_kdump_kernel_config(struct enic
*enic
)
2280 if (is_kdump_kernel()) {
2281 dev_info(enic_get_dev(enic
), "Running from within kdump kernel. Using minimal resources\n");
2284 enic
->config
.rq_desc_count
= ENIC_MIN_RQ_DESCS
;
2285 enic
->config
.wq_desc_count
= ENIC_MIN_WQ_DESCS
;
2286 enic
->config
.mtu
= min_t(u16
, 1500, enic
->config
.mtu
);
2290 static int enic_dev_init(struct enic
*enic
)
2292 struct device
*dev
= enic_get_dev(enic
);
2293 struct net_device
*netdev
= enic
->netdev
;
2297 /* Get interrupt coalesce timer info */
2298 err
= enic_dev_intr_coal_timer_info(enic
);
2300 dev_warn(dev
, "Using default conversion factor for "
2301 "interrupt coalesce timer\n");
2302 vnic_dev_intr_coal_timer_info_default(enic
->vdev
);
2305 /* Get vNIC configuration
2308 err
= enic_get_vnic_config(enic
);
2310 dev_err(dev
, "Get vNIC configuration failed, aborting\n");
2314 /* Get available resource counts
2317 enic_get_res_counts(enic
);
2319 /* modify resource count if we are in kdump_kernel
2321 enic_kdump_kernel_config(enic
);
2323 /* Set interrupt mode based on resource counts and system
2327 err
= enic_set_intr_mode(enic
);
2329 dev_err(dev
, "Failed to set intr mode based on resource "
2330 "counts and system capabilities, aborting\n");
2334 /* Allocate and configure vNIC resources
2337 err
= enic_alloc_vnic_resources(enic
);
2339 dev_err(dev
, "Failed to alloc vNIC resources, aborting\n");
2340 goto err_out_free_vnic_resources
;
2343 enic_init_vnic_resources(enic
);
2345 err
= enic_set_rss_nic_cfg(enic
);
2347 dev_err(dev
, "Failed to config nic, aborting\n");
2348 goto err_out_free_vnic_resources
;
2351 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
2353 netif_napi_add(netdev
, &enic
->napi
[0], enic_poll
, 64);
2354 napi_hash_add(&enic
->napi
[0]);
2356 case VNIC_DEV_INTR_MODE_MSIX
:
2357 for (i
= 0; i
< enic
->rq_count
; i
++) {
2358 netif_napi_add(netdev
, &enic
->napi
[i
],
2359 enic_poll_msix_rq
, NAPI_POLL_WEIGHT
);
2360 napi_hash_add(&enic
->napi
[i
]);
2362 for (i
= 0; i
< enic
->wq_count
; i
++)
2363 netif_napi_add(netdev
, &enic
->napi
[enic_cq_wq(enic
, i
)],
2364 enic_poll_msix_wq
, NAPI_POLL_WEIGHT
);
2370 err_out_free_vnic_resources
:
2371 enic_clear_intr_mode(enic
);
2372 enic_free_vnic_resources(enic
);
2377 static void enic_iounmap(struct enic
*enic
)
2381 for (i
= 0; i
< ARRAY_SIZE(enic
->bar
); i
++)
2382 if (enic
->bar
[i
].vaddr
)
2383 iounmap(enic
->bar
[i
].vaddr
);
2386 static int enic_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2388 struct device
*dev
= &pdev
->dev
;
2389 struct net_device
*netdev
;
2394 #ifdef CONFIG_PCI_IOV
2399 /* Allocate net device structure and initialize. Private
2400 * instance data is initialized to zero.
2403 netdev
= alloc_etherdev_mqs(sizeof(struct enic
),
2404 ENIC_RQ_MAX
, ENIC_WQ_MAX
);
2408 pci_set_drvdata(pdev
, netdev
);
2410 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2412 enic
= netdev_priv(netdev
);
2413 enic
->netdev
= netdev
;
2416 /* Setup PCI resources
2419 err
= pci_enable_device_mem(pdev
);
2421 dev_err(dev
, "Cannot enable PCI device, aborting\n");
2422 goto err_out_free_netdev
;
2425 err
= pci_request_regions(pdev
, DRV_NAME
);
2427 dev_err(dev
, "Cannot request PCI regions, aborting\n");
2428 goto err_out_disable_device
;
2431 pci_set_master(pdev
);
2433 /* Query PCI controller on system for DMA addressing
2434 * limitation for the device. Try 64-bit first, and
2438 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
2440 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
2442 dev_err(dev
, "No usable DMA configuration, aborting\n");
2443 goto err_out_release_regions
;
2445 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
2447 dev_err(dev
, "Unable to obtain %u-bit DMA "
2448 "for consistent allocations, aborting\n", 32);
2449 goto err_out_release_regions
;
2452 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
2454 dev_err(dev
, "Unable to obtain %u-bit DMA "
2455 "for consistent allocations, aborting\n", 64);
2456 goto err_out_release_regions
;
2461 /* Map vNIC resources from BAR0-5
2464 for (i
= 0; i
< ARRAY_SIZE(enic
->bar
); i
++) {
2465 if (!(pci_resource_flags(pdev
, i
) & IORESOURCE_MEM
))
2467 enic
->bar
[i
].len
= pci_resource_len(pdev
, i
);
2468 enic
->bar
[i
].vaddr
= pci_iomap(pdev
, i
, enic
->bar
[i
].len
);
2469 if (!enic
->bar
[i
].vaddr
) {
2470 dev_err(dev
, "Cannot memory-map BAR %d, aborting\n", i
);
2472 goto err_out_iounmap
;
2474 enic
->bar
[i
].bus_addr
= pci_resource_start(pdev
, i
);
2477 /* Register vNIC device
2480 enic
->vdev
= vnic_dev_register(NULL
, enic
, pdev
, enic
->bar
,
2481 ARRAY_SIZE(enic
->bar
));
2483 dev_err(dev
, "vNIC registration failed, aborting\n");
2485 goto err_out_iounmap
;
2488 #ifdef CONFIG_PCI_IOV
2489 /* Get number of subvnics */
2490 pos
= pci_find_ext_capability(pdev
, PCI_EXT_CAP_ID_SRIOV
);
2492 pci_read_config_word(pdev
, pos
+ PCI_SRIOV_TOTAL_VF
,
2494 if (enic
->num_vfs
) {
2495 err
= pci_enable_sriov(pdev
, enic
->num_vfs
);
2497 dev_err(dev
, "SRIOV enable failed, aborting."
2498 " pci_enable_sriov() returned %d\n",
2500 goto err_out_vnic_unregister
;
2502 enic
->priv_flags
|= ENIC_SRIOV_ENABLED
;
2503 num_pps
= enic
->num_vfs
;
2508 /* Allocate structure for port profiles */
2509 enic
->pp
= kcalloc(num_pps
, sizeof(*enic
->pp
), GFP_KERNEL
);
2512 goto err_out_disable_sriov_pp
;
2515 /* Issue device open to get device in known state
2518 err
= enic_dev_open(enic
);
2520 dev_err(dev
, "vNIC dev open failed, aborting\n");
2521 goto err_out_disable_sriov
;
2524 /* Setup devcmd lock
2527 spin_lock_init(&enic
->devcmd_lock
);
2528 spin_lock_init(&enic
->enic_api_lock
);
2531 * Set ingress vlan rewrite mode before vnic initialization
2534 err
= enic_dev_set_ig_vlan_rewrite_mode(enic
);
2537 "Failed to set ingress vlan rewrite mode, aborting.\n");
2538 goto err_out_dev_close
;
2541 /* Issue device init to initialize the vnic-to-switch link.
2542 * We'll start with carrier off and wait for link UP
2543 * notification later to turn on carrier. We don't need
2544 * to wait here for the vnic-to-switch link initialization
2545 * to complete; link UP notification is the indication that
2546 * the process is complete.
2549 netif_carrier_off(netdev
);
2551 /* Do not call dev_init for a dynamic vnic.
2552 * For a dynamic vnic, init_prov_info will be
2553 * called later by an upper layer.
2556 if (!enic_is_dynamic(enic
)) {
2557 err
= vnic_dev_init(enic
->vdev
, 0);
2559 dev_err(dev
, "vNIC dev init failed, aborting\n");
2560 goto err_out_dev_close
;
2564 err
= enic_dev_init(enic
);
2566 dev_err(dev
, "Device initialization failed, aborting\n");
2567 goto err_out_dev_close
;
2570 netif_set_real_num_tx_queues(netdev
, enic
->wq_count
);
2571 netif_set_real_num_rx_queues(netdev
, enic
->rq_count
);
2573 /* Setup notification timer, HW reset task, and wq locks
2576 init_timer(&enic
->notify_timer
);
2577 enic
->notify_timer
.function
= enic_notify_timer
;
2578 enic
->notify_timer
.data
= (unsigned long)enic
;
2580 enic_set_rx_coal_setting(enic
);
2581 INIT_WORK(&enic
->reset
, enic_reset
);
2582 INIT_WORK(&enic
->change_mtu_work
, enic_change_mtu_work
);
2584 for (i
= 0; i
< enic
->wq_count
; i
++)
2585 spin_lock_init(&enic
->wq_lock
[i
]);
2587 /* Register net device
2590 enic
->port_mtu
= enic
->config
.mtu
;
2591 (void)enic_change_mtu(netdev
, enic
->port_mtu
);
2593 err
= enic_set_mac_addr(netdev
, enic
->mac_addr
);
2595 dev_err(dev
, "Invalid MAC address, aborting\n");
2596 goto err_out_dev_deinit
;
2599 enic
->tx_coalesce_usecs
= enic
->config
.intr_timer_usec
;
2600 /* rx coalesce time already got initialized. This gets used
2601 * if adaptive coal is turned off
2603 enic
->rx_coalesce_usecs
= enic
->tx_coalesce_usecs
;
2605 if (enic_is_dynamic(enic
) || enic_is_sriov_vf(enic
))
2606 netdev
->netdev_ops
= &enic_netdev_dynamic_ops
;
2608 netdev
->netdev_ops
= &enic_netdev_ops
;
2610 netdev
->watchdog_timeo
= 2 * HZ
;
2611 enic_set_ethtool_ops(netdev
);
2613 netdev
->features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_CTAG_RX
;
2614 if (ENIC_SETTING(enic
, LOOP
)) {
2615 netdev
->features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
2616 enic
->loop_enable
= 1;
2617 enic
->loop_tag
= enic
->config
.loop_tag
;
2618 dev_info(dev
, "loopback tag=0x%04x\n", enic
->loop_tag
);
2620 if (ENIC_SETTING(enic
, TXCSUM
))
2621 netdev
->hw_features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
2622 if (ENIC_SETTING(enic
, TSO
))
2623 netdev
->hw_features
|= NETIF_F_TSO
|
2624 NETIF_F_TSO6
| NETIF_F_TSO_ECN
;
2625 if (ENIC_SETTING(enic
, RSS
))
2626 netdev
->hw_features
|= NETIF_F_RXHASH
;
2627 if (ENIC_SETTING(enic
, RXCSUM
))
2628 netdev
->hw_features
|= NETIF_F_RXCSUM
;
2630 netdev
->features
|= netdev
->hw_features
;
2632 #ifdef CONFIG_RFS_ACCEL
2633 netdev
->hw_features
|= NETIF_F_NTUPLE
;
2637 netdev
->features
|= NETIF_F_HIGHDMA
;
2639 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
2641 err
= register_netdev(netdev
);
2643 dev_err(dev
, "Cannot register net device, aborting\n");
2644 goto err_out_dev_deinit
;
2646 enic
->rx_copybreak
= RX_COPYBREAK_DEFAULT
;
2651 enic_dev_deinit(enic
);
2653 vnic_dev_close(enic
->vdev
);
2654 err_out_disable_sriov
:
2656 err_out_disable_sriov_pp
:
2657 #ifdef CONFIG_PCI_IOV
2658 if (enic_sriov_enabled(enic
)) {
2659 pci_disable_sriov(pdev
);
2660 enic
->priv_flags
&= ~ENIC_SRIOV_ENABLED
;
2662 err_out_vnic_unregister
:
2664 vnic_dev_unregister(enic
->vdev
);
2667 err_out_release_regions
:
2668 pci_release_regions(pdev
);
2669 err_out_disable_device
:
2670 pci_disable_device(pdev
);
2671 err_out_free_netdev
:
2672 free_netdev(netdev
);
2677 static void enic_remove(struct pci_dev
*pdev
)
2679 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2682 struct enic
*enic
= netdev_priv(netdev
);
2684 cancel_work_sync(&enic
->reset
);
2685 cancel_work_sync(&enic
->change_mtu_work
);
2686 unregister_netdev(netdev
);
2687 enic_dev_deinit(enic
);
2688 vnic_dev_close(enic
->vdev
);
2689 #ifdef CONFIG_PCI_IOV
2690 if (enic_sriov_enabled(enic
)) {
2691 pci_disable_sriov(pdev
);
2692 enic
->priv_flags
&= ~ENIC_SRIOV_ENABLED
;
2696 vnic_dev_unregister(enic
->vdev
);
2698 pci_release_regions(pdev
);
2699 pci_disable_device(pdev
);
2700 free_netdev(netdev
);
2704 static struct pci_driver enic_driver
= {
2706 .id_table
= enic_id_table
,
2707 .probe
= enic_probe
,
2708 .remove
= enic_remove
,
2711 static int __init
enic_init_module(void)
2713 pr_info("%s, ver %s\n", DRV_DESCRIPTION
, DRV_VERSION
);
2715 return pci_register_driver(&enic_driver
);
2718 static void __exit
enic_cleanup_module(void)
2720 pci_unregister_driver(&enic_driver
);
2723 module_init(enic_init_module
);
2724 module_exit(enic_cleanup_module
);