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 #include <linux/numa.h>
43 #ifdef CONFIG_RFS_ACCEL
44 #include <linux/cpu_rmap.h>
46 #include <linux/crash_dump.h>
47 #include <net/busy_poll.h>
48 #include <net/vxlan.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 static void enic_init_affinity_hint(struct enic
*enic
)
117 int numa_node
= dev_to_node(&enic
->pdev
->dev
);
120 for (i
= 0; i
< enic
->intr_count
; i
++) {
121 if (enic_is_err_intr(enic
, i
) || enic_is_notify_intr(enic
, i
) ||
122 (enic
->msix
[i
].affinity_mask
&&
123 !cpumask_empty(enic
->msix
[i
].affinity_mask
)))
125 if (zalloc_cpumask_var(&enic
->msix
[i
].affinity_mask
,
127 cpumask_set_cpu(cpumask_local_spread(i
, numa_node
),
128 enic
->msix
[i
].affinity_mask
);
132 static void enic_free_affinity_hint(struct enic
*enic
)
136 for (i
= 0; i
< enic
->intr_count
; i
++) {
137 if (enic_is_err_intr(enic
, i
) || enic_is_notify_intr(enic
, i
))
139 free_cpumask_var(enic
->msix
[i
].affinity_mask
);
143 static void enic_set_affinity_hint(struct enic
*enic
)
148 for (i
= 0; i
< enic
->intr_count
; i
++) {
149 if (enic_is_err_intr(enic
, i
) ||
150 enic_is_notify_intr(enic
, i
) ||
151 !enic
->msix
[i
].affinity_mask
||
152 cpumask_empty(enic
->msix
[i
].affinity_mask
))
154 err
= irq_set_affinity_hint(enic
->msix_entry
[i
].vector
,
155 enic
->msix
[i
].affinity_mask
);
157 netdev_warn(enic
->netdev
, "irq_set_affinity_hint failed, err %d\n",
161 for (i
= 0; i
< enic
->wq_count
; i
++) {
162 int wq_intr
= enic_msix_wq_intr(enic
, i
);
164 if (enic
->msix
[wq_intr
].affinity_mask
&&
165 !cpumask_empty(enic
->msix
[wq_intr
].affinity_mask
))
166 netif_set_xps_queue(enic
->netdev
,
167 enic
->msix
[wq_intr
].affinity_mask
,
172 static void enic_unset_affinity_hint(struct enic
*enic
)
176 for (i
= 0; i
< enic
->intr_count
; i
++)
177 irq_set_affinity_hint(enic
->msix_entry
[i
].vector
, NULL
);
180 static void enic_udp_tunnel_add(struct net_device
*netdev
,
181 struct udp_tunnel_info
*ti
)
183 struct enic
*enic
= netdev_priv(netdev
);
184 __be16 port
= ti
->port
;
187 spin_lock_bh(&enic
->devcmd_lock
);
189 if (ti
->type
!= UDP_TUNNEL_TYPE_VXLAN
) {
190 netdev_info(netdev
, "udp_tnl: only vxlan tunnel offload supported");
194 if (ti
->sa_family
!= AF_INET
) {
195 netdev_info(netdev
, "vxlan: only IPv4 offload supported");
199 if (enic
->vxlan
.vxlan_udp_port_number
) {
200 if (ntohs(port
) == enic
->vxlan
.vxlan_udp_port_number
)
201 netdev_warn(netdev
, "vxlan: udp port already offloaded");
203 netdev_info(netdev
, "vxlan: offload supported for only one UDP port");
208 err
= vnic_dev_overlay_offload_cfg(enic
->vdev
,
209 OVERLAY_CFG_VXLAN_PORT_UPDATE
,
214 err
= vnic_dev_overlay_offload_ctrl(enic
->vdev
, OVERLAY_FEATURE_VXLAN
,
215 enic
->vxlan
.patch_level
);
219 enic
->vxlan
.vxlan_udp_port_number
= ntohs(port
);
221 netdev_info(netdev
, "vxlan fw-vers-%d: offload enabled for udp port: %d, sa_family: %d ",
222 (int)enic
->vxlan
.patch_level
, ntohs(port
), ti
->sa_family
);
227 netdev_info(netdev
, "failed to offload udp port: %d, sa_family: %d, type: %d",
228 ntohs(port
), ti
->sa_family
, ti
->type
);
230 spin_unlock_bh(&enic
->devcmd_lock
);
233 static void enic_udp_tunnel_del(struct net_device
*netdev
,
234 struct udp_tunnel_info
*ti
)
236 struct enic
*enic
= netdev_priv(netdev
);
239 spin_lock_bh(&enic
->devcmd_lock
);
241 if ((ti
->sa_family
!= AF_INET
) ||
242 ((ntohs(ti
->port
) != enic
->vxlan
.vxlan_udp_port_number
)) ||
243 (ti
->type
!= UDP_TUNNEL_TYPE_VXLAN
)) {
244 netdev_info(netdev
, "udp_tnl: port:%d, sa_family: %d, type: %d not offloaded",
245 ntohs(ti
->port
), ti
->sa_family
, ti
->type
);
249 err
= vnic_dev_overlay_offload_ctrl(enic
->vdev
, OVERLAY_FEATURE_VXLAN
,
250 OVERLAY_OFFLOAD_DISABLE
);
252 netdev_err(netdev
, "vxlan: del offload udp port: %d failed",
257 enic
->vxlan
.vxlan_udp_port_number
= 0;
259 netdev_info(netdev
, "vxlan: del offload udp port %d, family %d\n",
260 ntohs(ti
->port
), ti
->sa_family
);
263 spin_unlock_bh(&enic
->devcmd_lock
);
266 static netdev_features_t
enic_features_check(struct sk_buff
*skb
,
267 struct net_device
*dev
,
268 netdev_features_t features
)
270 const struct ethhdr
*eth
= (struct ethhdr
*)skb_inner_mac_header(skb
);
271 struct enic
*enic
= netdev_priv(dev
);
276 if (!skb
->encapsulation
)
279 features
= vxlan_features_check(skb
, features
);
281 /* hardware only supports IPv4 vxlan tunnel */
282 if (vlan_get_protocol(skb
) != htons(ETH_P_IP
))
285 /* hardware does not support offload of ipv6 inner pkt */
286 if (eth
->h_proto
!= ntohs(ETH_P_IP
))
289 proto
= ip_hdr(skb
)->protocol
;
291 if (proto
== IPPROTO_UDP
) {
293 port
= be16_to_cpu(udph
->dest
);
296 /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK
297 * for other UDP port tunnels
299 if (port
!= enic
->vxlan
.vxlan_udp_port_number
)
305 return features
& ~(NETIF_F_CSUM_MASK
| NETIF_F_GSO_MASK
);
308 int enic_is_dynamic(struct enic
*enic
)
310 return enic
->pdev
->device
== PCI_DEVICE_ID_CISCO_VIC_ENET_DYN
;
313 int enic_sriov_enabled(struct enic
*enic
)
315 return (enic
->priv_flags
& ENIC_SRIOV_ENABLED
) ? 1 : 0;
318 static int enic_is_sriov_vf(struct enic
*enic
)
320 return enic
->pdev
->device
== PCI_DEVICE_ID_CISCO_VIC_ENET_VF
;
323 int enic_is_valid_vf(struct enic
*enic
, int vf
)
325 #ifdef CONFIG_PCI_IOV
326 return vf
>= 0 && vf
< enic
->num_vfs
;
332 static void enic_free_wq_buf(struct vnic_wq
*wq
, struct vnic_wq_buf
*buf
)
334 struct enic
*enic
= vnic_dev_priv(wq
->vdev
);
337 pci_unmap_single(enic
->pdev
, buf
->dma_addr
,
338 buf
->len
, PCI_DMA_TODEVICE
);
340 pci_unmap_page(enic
->pdev
, buf
->dma_addr
,
341 buf
->len
, PCI_DMA_TODEVICE
);
344 dev_kfree_skb_any(buf
->os_buf
);
347 static void enic_wq_free_buf(struct vnic_wq
*wq
,
348 struct cq_desc
*cq_desc
, struct vnic_wq_buf
*buf
, void *opaque
)
350 enic_free_wq_buf(wq
, buf
);
353 static int enic_wq_service(struct vnic_dev
*vdev
, struct cq_desc
*cq_desc
,
354 u8 type
, u16 q_number
, u16 completed_index
, void *opaque
)
356 struct enic
*enic
= vnic_dev_priv(vdev
);
358 spin_lock(&enic
->wq_lock
[q_number
]);
360 vnic_wq_service(&enic
->wq
[q_number
], cq_desc
,
361 completed_index
, enic_wq_free_buf
,
364 if (netif_tx_queue_stopped(netdev_get_tx_queue(enic
->netdev
, q_number
)) &&
365 vnic_wq_desc_avail(&enic
->wq
[q_number
]) >=
366 (MAX_SKB_FRAGS
+ ENIC_DESC_MAX_SPLITS
))
367 netif_wake_subqueue(enic
->netdev
, q_number
);
369 spin_unlock(&enic
->wq_lock
[q_number
]);
374 static bool enic_log_q_error(struct enic
*enic
)
380 for (i
= 0; i
< enic
->wq_count
; i
++) {
381 error_status
= vnic_wq_error_status(&enic
->wq
[i
]);
384 netdev_err(enic
->netdev
, "WQ[%d] error_status %d\n",
388 for (i
= 0; i
< enic
->rq_count
; i
++) {
389 error_status
= vnic_rq_error_status(&enic
->rq
[i
]);
392 netdev_err(enic
->netdev
, "RQ[%d] error_status %d\n",
399 static void enic_msglvl_check(struct enic
*enic
)
401 u32 msg_enable
= vnic_dev_msg_lvl(enic
->vdev
);
403 if (msg_enable
!= enic
->msg_enable
) {
404 netdev_info(enic
->netdev
, "msg lvl changed from 0x%x to 0x%x\n",
405 enic
->msg_enable
, msg_enable
);
406 enic
->msg_enable
= msg_enable
;
410 static void enic_mtu_check(struct enic
*enic
)
412 u32 mtu
= vnic_dev_mtu(enic
->vdev
);
413 struct net_device
*netdev
= enic
->netdev
;
415 if (mtu
&& mtu
!= enic
->port_mtu
) {
416 enic
->port_mtu
= mtu
;
417 if (enic_is_dynamic(enic
) || enic_is_sriov_vf(enic
)) {
418 mtu
= max_t(int, ENIC_MIN_MTU
,
419 min_t(int, ENIC_MAX_MTU
, mtu
));
420 if (mtu
!= netdev
->mtu
)
421 schedule_work(&enic
->change_mtu_work
);
423 if (mtu
< netdev
->mtu
)
425 "interface MTU (%d) set higher "
426 "than switch port MTU (%d)\n",
432 static void enic_link_check(struct enic
*enic
)
434 int link_status
= vnic_dev_link_status(enic
->vdev
);
435 int carrier_ok
= netif_carrier_ok(enic
->netdev
);
437 if (link_status
&& !carrier_ok
) {
438 netdev_info(enic
->netdev
, "Link UP\n");
439 netif_carrier_on(enic
->netdev
);
440 } else if (!link_status
&& carrier_ok
) {
441 netdev_info(enic
->netdev
, "Link DOWN\n");
442 netif_carrier_off(enic
->netdev
);
446 static void enic_notify_check(struct enic
*enic
)
448 enic_msglvl_check(enic
);
449 enic_mtu_check(enic
);
450 enic_link_check(enic
);
453 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
455 static irqreturn_t
enic_isr_legacy(int irq
, void *data
)
457 struct net_device
*netdev
= data
;
458 struct enic
*enic
= netdev_priv(netdev
);
459 unsigned int io_intr
= enic_legacy_io_intr();
460 unsigned int err_intr
= enic_legacy_err_intr();
461 unsigned int notify_intr
= enic_legacy_notify_intr();
464 vnic_intr_mask(&enic
->intr
[io_intr
]);
466 pba
= vnic_intr_legacy_pba(enic
->legacy_pba
);
468 vnic_intr_unmask(&enic
->intr
[io_intr
]);
469 return IRQ_NONE
; /* not our interrupt */
472 if (ENIC_TEST_INTR(pba
, notify_intr
)) {
473 enic_notify_check(enic
);
474 vnic_intr_return_all_credits(&enic
->intr
[notify_intr
]);
477 if (ENIC_TEST_INTR(pba
, err_intr
)) {
478 vnic_intr_return_all_credits(&enic
->intr
[err_intr
]);
479 enic_log_q_error(enic
);
480 /* schedule recovery from WQ/RQ error */
481 schedule_work(&enic
->reset
);
485 if (ENIC_TEST_INTR(pba
, io_intr
))
486 napi_schedule_irqoff(&enic
->napi
[0]);
488 vnic_intr_unmask(&enic
->intr
[io_intr
]);
493 static irqreturn_t
enic_isr_msi(int irq
, void *data
)
495 struct enic
*enic
= data
;
497 /* With MSI, there is no sharing of interrupts, so this is
498 * our interrupt and there is no need to ack it. The device
499 * is not providing per-vector masking, so the OS will not
500 * write to PCI config space to mask/unmask the interrupt.
501 * We're using mask_on_assertion for MSI, so the device
502 * automatically masks the interrupt when the interrupt is
503 * generated. Later, when exiting polling, the interrupt
504 * will be unmasked (see enic_poll).
506 * Also, the device uses the same PCIe Traffic Class (TC)
507 * for Memory Write data and MSI, so there are no ordering
508 * issues; the MSI will always arrive at the Root Complex
509 * _after_ corresponding Memory Writes (i.e. descriptor
513 napi_schedule_irqoff(&enic
->napi
[0]);
518 static irqreturn_t
enic_isr_msix(int irq
, void *data
)
520 struct napi_struct
*napi
= data
;
522 napi_schedule_irqoff(napi
);
527 static irqreturn_t
enic_isr_msix_err(int irq
, void *data
)
529 struct enic
*enic
= data
;
530 unsigned int intr
= enic_msix_err_intr(enic
);
532 vnic_intr_return_all_credits(&enic
->intr
[intr
]);
534 if (enic_log_q_error(enic
))
535 /* schedule recovery from WQ/RQ error */
536 schedule_work(&enic
->reset
);
541 static irqreturn_t
enic_isr_msix_notify(int irq
, void *data
)
543 struct enic
*enic
= data
;
544 unsigned int intr
= enic_msix_notify_intr(enic
);
546 enic_notify_check(enic
);
547 vnic_intr_return_all_credits(&enic
->intr
[intr
]);
552 static int enic_queue_wq_skb_cont(struct enic
*enic
, struct vnic_wq
*wq
,
553 struct sk_buff
*skb
, unsigned int len_left
,
556 const skb_frag_t
*frag
;
559 /* Queue additional data fragments */
560 for (frag
= skb_shinfo(skb
)->frags
; len_left
; frag
++) {
561 len_left
-= skb_frag_size(frag
);
562 dma_addr
= skb_frag_dma_map(&enic
->pdev
->dev
, frag
, 0,
565 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
567 enic_queue_wq_desc_cont(wq
, skb
, dma_addr
, skb_frag_size(frag
),
568 (len_left
== 0), /* EOP? */
575 static int enic_queue_wq_skb_vlan(struct enic
*enic
, struct vnic_wq
*wq
,
576 struct sk_buff
*skb
, int vlan_tag_insert
,
577 unsigned int vlan_tag
, int loopback
)
579 unsigned int head_len
= skb_headlen(skb
);
580 unsigned int len_left
= skb
->len
- head_len
;
581 int eop
= (len_left
== 0);
585 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
, head_len
,
587 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
590 /* Queue the main skb fragment. The fragments are no larger
591 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
592 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
593 * per fragment is queued.
595 enic_queue_wq_desc(wq
, skb
, dma_addr
, head_len
, vlan_tag_insert
,
596 vlan_tag
, eop
, loopback
);
599 err
= enic_queue_wq_skb_cont(enic
, wq
, skb
, len_left
, loopback
);
604 static int enic_queue_wq_skb_csum_l4(struct enic
*enic
, struct vnic_wq
*wq
,
605 struct sk_buff
*skb
, int vlan_tag_insert
,
606 unsigned int vlan_tag
, int loopback
)
608 unsigned int head_len
= skb_headlen(skb
);
609 unsigned int len_left
= skb
->len
- head_len
;
610 unsigned int hdr_len
= skb_checksum_start_offset(skb
);
611 unsigned int csum_offset
= hdr_len
+ skb
->csum_offset
;
612 int eop
= (len_left
== 0);
616 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
, head_len
,
618 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
621 /* Queue the main skb fragment. The fragments are no larger
622 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
623 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
624 * per fragment is queued.
626 enic_queue_wq_desc_csum_l4(wq
, skb
, dma_addr
, head_len
, csum_offset
,
627 hdr_len
, vlan_tag_insert
, vlan_tag
, eop
,
631 err
= enic_queue_wq_skb_cont(enic
, wq
, skb
, len_left
, loopback
);
636 static void enic_preload_tcp_csum_encap(struct sk_buff
*skb
)
638 if (skb
->protocol
== cpu_to_be16(ETH_P_IP
)) {
639 inner_ip_hdr(skb
)->check
= 0;
640 inner_tcp_hdr(skb
)->check
=
641 ~csum_tcpudp_magic(inner_ip_hdr(skb
)->saddr
,
642 inner_ip_hdr(skb
)->daddr
, 0,
647 static void enic_preload_tcp_csum(struct sk_buff
*skb
)
649 /* Preload TCP csum field with IP pseudo hdr calculated
650 * with IP length set to zero. HW will later add in length
651 * to each TCP segment resulting from the TSO.
654 if (skb
->protocol
== cpu_to_be16(ETH_P_IP
)) {
655 ip_hdr(skb
)->check
= 0;
656 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(ip_hdr(skb
)->saddr
,
657 ip_hdr(skb
)->daddr
, 0, IPPROTO_TCP
, 0);
658 } else if (skb
->protocol
== cpu_to_be16(ETH_P_IPV6
)) {
659 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
660 &ipv6_hdr(skb
)->daddr
, 0, IPPROTO_TCP
, 0);
664 static int enic_queue_wq_skb_tso(struct enic
*enic
, struct vnic_wq
*wq
,
665 struct sk_buff
*skb
, unsigned int mss
,
666 int vlan_tag_insert
, unsigned int vlan_tag
,
669 unsigned int frag_len_left
= skb_headlen(skb
);
670 unsigned int len_left
= skb
->len
- frag_len_left
;
671 int eop
= (len_left
== 0);
672 unsigned int offset
= 0;
673 unsigned int hdr_len
;
678 if (skb
->encapsulation
) {
679 hdr_len
= skb_inner_transport_header(skb
) - skb
->data
;
680 hdr_len
+= inner_tcp_hdrlen(skb
);
681 enic_preload_tcp_csum_encap(skb
);
683 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
684 enic_preload_tcp_csum(skb
);
687 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
688 * for the main skb fragment
690 while (frag_len_left
) {
691 len
= min(frag_len_left
, (unsigned int)WQ_ENET_MAX_DESC_LEN
);
692 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
+ offset
, len
,
694 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
696 enic_queue_wq_desc_tso(wq
, skb
, dma_addr
, len
, mss
, hdr_len
,
697 vlan_tag_insert
, vlan_tag
,
698 eop
&& (len
== frag_len_left
), loopback
);
699 frag_len_left
-= len
;
706 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
707 * for additional data fragments
709 for (frag
= skb_shinfo(skb
)->frags
; len_left
; frag
++) {
710 len_left
-= skb_frag_size(frag
);
711 frag_len_left
= skb_frag_size(frag
);
714 while (frag_len_left
) {
715 len
= min(frag_len_left
,
716 (unsigned int)WQ_ENET_MAX_DESC_LEN
);
717 dma_addr
= skb_frag_dma_map(&enic
->pdev
->dev
, frag
,
720 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
722 enic_queue_wq_desc_cont(wq
, skb
, dma_addr
, len
,
724 (len
== frag_len_left
),/*EOP*/
726 frag_len_left
-= len
;
734 static inline int enic_queue_wq_skb_encap(struct enic
*enic
, struct vnic_wq
*wq
,
737 unsigned int vlan_tag
, int loopback
)
739 unsigned int head_len
= skb_headlen(skb
);
740 unsigned int len_left
= skb
->len
- head_len
;
741 /* Hardware will overwrite the checksum fields, calculating from
742 * scratch and ignoring the value placed by software.
744 * mss[2], mss[1], mss[0] bits are set
746 unsigned int mss_or_csum
= 7;
747 int eop
= (len_left
== 0);
751 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
, head_len
,
753 if (unlikely(enic_dma_map_check(enic
, dma_addr
)))
756 enic_queue_wq_desc_ex(wq
, skb
, dma_addr
, head_len
, mss_or_csum
, 0,
757 vlan_tag_insert
, vlan_tag
,
758 WQ_ENET_OFFLOAD_MODE_CSUM
, eop
, 1 /* SOP */, eop
,
761 err
= enic_queue_wq_skb_cont(enic
, wq
, skb
, len_left
, loopback
);
766 static inline void enic_queue_wq_skb(struct enic
*enic
,
767 struct vnic_wq
*wq
, struct sk_buff
*skb
)
769 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
770 unsigned int vlan_tag
= 0;
771 int vlan_tag_insert
= 0;
775 if (skb_vlan_tag_present(skb
)) {
776 /* VLAN tag from trunking driver */
778 vlan_tag
= skb_vlan_tag_get(skb
);
779 } else if (enic
->loop_enable
) {
780 vlan_tag
= enic
->loop_tag
;
785 err
= enic_queue_wq_skb_tso(enic
, wq
, skb
, mss
,
786 vlan_tag_insert
, vlan_tag
,
788 else if (skb
->encapsulation
)
789 err
= enic_queue_wq_skb_encap(enic
, wq
, skb
, vlan_tag_insert
,
791 else if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
792 err
= enic_queue_wq_skb_csum_l4(enic
, wq
, skb
, vlan_tag_insert
,
795 err
= enic_queue_wq_skb_vlan(enic
, wq
, skb
, vlan_tag_insert
,
798 struct vnic_wq_buf
*buf
;
800 buf
= wq
->to_use
->prev
;
801 /* while not EOP of previous pkt && queue not empty.
802 * For all non EOP bufs, os_buf is NULL.
804 while (!buf
->os_buf
&& (buf
->next
!= wq
->to_clean
)) {
805 enic_free_wq_buf(wq
, buf
);
806 wq
->ring
.desc_avail
++;
809 wq
->to_use
= buf
->next
;
814 /* netif_tx_lock held, process context with BHs disabled, or BH */
815 static netdev_tx_t
enic_hard_start_xmit(struct sk_buff
*skb
,
816 struct net_device
*netdev
)
818 struct enic
*enic
= netdev_priv(netdev
);
820 unsigned int txq_map
;
821 struct netdev_queue
*txq
;
824 dev_kfree_skb_any(skb
);
828 txq_map
= skb_get_queue_mapping(skb
) % enic
->wq_count
;
829 wq
= &enic
->wq
[txq_map
];
830 txq
= netdev_get_tx_queue(netdev
, txq_map
);
832 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
833 * which is very likely. In the off chance it's going to take
834 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
837 if (skb_shinfo(skb
)->gso_size
== 0 &&
838 skb_shinfo(skb
)->nr_frags
+ 1 > ENIC_NON_TSO_MAX_DESC
&&
839 skb_linearize(skb
)) {
840 dev_kfree_skb_any(skb
);
844 spin_lock(&enic
->wq_lock
[txq_map
]);
846 if (vnic_wq_desc_avail(wq
) <
847 skb_shinfo(skb
)->nr_frags
+ ENIC_DESC_MAX_SPLITS
) {
848 netif_tx_stop_queue(txq
);
849 /* This is a hard error, log it */
850 netdev_err(netdev
, "BUG! Tx ring full when queue awake!\n");
851 spin_unlock(&enic
->wq_lock
[txq_map
]);
852 return NETDEV_TX_BUSY
;
855 enic_queue_wq_skb(enic
, wq
, skb
);
857 if (vnic_wq_desc_avail(wq
) < MAX_SKB_FRAGS
+ ENIC_DESC_MAX_SPLITS
)
858 netif_tx_stop_queue(txq
);
859 if (!skb
->xmit_more
|| netif_xmit_stopped(txq
))
860 vnic_wq_doorbell(wq
);
862 spin_unlock(&enic
->wq_lock
[txq_map
]);
867 /* dev_base_lock rwlock held, nominally process context */
868 static void enic_get_stats(struct net_device
*netdev
,
869 struct rtnl_link_stats64
*net_stats
)
871 struct enic
*enic
= netdev_priv(netdev
);
872 struct vnic_stats
*stats
;
875 err
= enic_dev_stats_dump(enic
, &stats
);
876 /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump
877 * For other failures, like devcmd failure, we return previously
883 net_stats
->tx_packets
= stats
->tx
.tx_frames_ok
;
884 net_stats
->tx_bytes
= stats
->tx
.tx_bytes_ok
;
885 net_stats
->tx_errors
= stats
->tx
.tx_errors
;
886 net_stats
->tx_dropped
= stats
->tx
.tx_drops
;
888 net_stats
->rx_packets
= stats
->rx
.rx_frames_ok
;
889 net_stats
->rx_bytes
= stats
->rx
.rx_bytes_ok
;
890 net_stats
->rx_errors
= stats
->rx
.rx_errors
;
891 net_stats
->multicast
= stats
->rx
.rx_multicast_frames_ok
;
892 net_stats
->rx_over_errors
= enic
->rq_truncated_pkts
;
893 net_stats
->rx_crc_errors
= enic
->rq_bad_fcs
;
894 net_stats
->rx_dropped
= stats
->rx
.rx_no_bufs
+ stats
->rx
.rx_drop
;
897 static int enic_mc_sync(struct net_device
*netdev
, const u8
*mc_addr
)
899 struct enic
*enic
= netdev_priv(netdev
);
901 if (enic
->mc_count
== ENIC_MULTICAST_PERFECT_FILTERS
) {
902 unsigned int mc_count
= netdev_mc_count(netdev
);
904 netdev_warn(netdev
, "Registering only %d out of %d multicast addresses\n",
905 ENIC_MULTICAST_PERFECT_FILTERS
, mc_count
);
910 enic_dev_add_addr(enic
, mc_addr
);
916 static int enic_mc_unsync(struct net_device
*netdev
, const u8
*mc_addr
)
918 struct enic
*enic
= netdev_priv(netdev
);
920 enic_dev_del_addr(enic
, mc_addr
);
926 static int enic_uc_sync(struct net_device
*netdev
, const u8
*uc_addr
)
928 struct enic
*enic
= netdev_priv(netdev
);
930 if (enic
->uc_count
== ENIC_UNICAST_PERFECT_FILTERS
) {
931 unsigned int uc_count
= netdev_uc_count(netdev
);
933 netdev_warn(netdev
, "Registering only %d out of %d unicast addresses\n",
934 ENIC_UNICAST_PERFECT_FILTERS
, uc_count
);
939 enic_dev_add_addr(enic
, uc_addr
);
945 static int enic_uc_unsync(struct net_device
*netdev
, const u8
*uc_addr
)
947 struct enic
*enic
= netdev_priv(netdev
);
949 enic_dev_del_addr(enic
, uc_addr
);
955 void enic_reset_addr_lists(struct enic
*enic
)
957 struct net_device
*netdev
= enic
->netdev
;
959 __dev_uc_unsync(netdev
, NULL
);
960 __dev_mc_unsync(netdev
, NULL
);
967 static int enic_set_mac_addr(struct net_device
*netdev
, char *addr
)
969 struct enic
*enic
= netdev_priv(netdev
);
971 if (enic_is_dynamic(enic
) || enic_is_sriov_vf(enic
)) {
972 if (!is_valid_ether_addr(addr
) && !is_zero_ether_addr(addr
))
973 return -EADDRNOTAVAIL
;
975 if (!is_valid_ether_addr(addr
))
976 return -EADDRNOTAVAIL
;
979 memcpy(netdev
->dev_addr
, addr
, netdev
->addr_len
);
984 static int enic_set_mac_address_dynamic(struct net_device
*netdev
, void *p
)
986 struct enic
*enic
= netdev_priv(netdev
);
987 struct sockaddr
*saddr
= p
;
988 char *addr
= saddr
->sa_data
;
991 if (netif_running(enic
->netdev
)) {
992 err
= enic_dev_del_station_addr(enic
);
997 err
= enic_set_mac_addr(netdev
, addr
);
1001 if (netif_running(enic
->netdev
)) {
1002 err
= enic_dev_add_station_addr(enic
);
1010 static int enic_set_mac_address(struct net_device
*netdev
, void *p
)
1012 struct sockaddr
*saddr
= p
;
1013 char *addr
= saddr
->sa_data
;
1014 struct enic
*enic
= netdev_priv(netdev
);
1017 err
= enic_dev_del_station_addr(enic
);
1021 err
= enic_set_mac_addr(netdev
, addr
);
1025 return enic_dev_add_station_addr(enic
);
1028 /* netif_tx_lock held, BHs disabled */
1029 static void enic_set_rx_mode(struct net_device
*netdev
)
1031 struct enic
*enic
= netdev_priv(netdev
);
1033 int multicast
= (netdev
->flags
& IFF_MULTICAST
) ? 1 : 0;
1034 int broadcast
= (netdev
->flags
& IFF_BROADCAST
) ? 1 : 0;
1035 int promisc
= (netdev
->flags
& IFF_PROMISC
) ||
1036 netdev_uc_count(netdev
) > ENIC_UNICAST_PERFECT_FILTERS
;
1037 int allmulti
= (netdev
->flags
& IFF_ALLMULTI
) ||
1038 netdev_mc_count(netdev
) > ENIC_MULTICAST_PERFECT_FILTERS
;
1039 unsigned int flags
= netdev
->flags
|
1040 (allmulti
? IFF_ALLMULTI
: 0) |
1041 (promisc
? IFF_PROMISC
: 0);
1043 if (enic
->flags
!= flags
) {
1044 enic
->flags
= flags
;
1045 enic_dev_packet_filter(enic
, directed
,
1046 multicast
, broadcast
, promisc
, allmulti
);
1050 __dev_uc_sync(netdev
, enic_uc_sync
, enic_uc_unsync
);
1052 __dev_mc_sync(netdev
, enic_mc_sync
, enic_mc_unsync
);
1056 /* netif_tx_lock held, BHs disabled */
1057 static void enic_tx_timeout(struct net_device
*netdev
)
1059 struct enic
*enic
= netdev_priv(netdev
);
1060 schedule_work(&enic
->tx_hang_reset
);
1063 static int enic_set_vf_mac(struct net_device
*netdev
, int vf
, u8
*mac
)
1065 struct enic
*enic
= netdev_priv(netdev
);
1066 struct enic_port_profile
*pp
;
1069 ENIC_PP_BY_INDEX(enic
, vf
, pp
, &err
);
1073 if (is_valid_ether_addr(mac
) || is_zero_ether_addr(mac
)) {
1074 if (vf
== PORT_SELF_VF
) {
1075 memcpy(pp
->vf_mac
, mac
, ETH_ALEN
);
1079 * For sriov vf's set the mac in hw
1081 ENIC_DEVCMD_PROXY_BY_INDEX(vf
, err
, enic
,
1082 vnic_dev_set_mac_addr
, mac
);
1083 return enic_dev_status_to_errno(err
);
1089 static int enic_set_vf_port(struct net_device
*netdev
, int vf
,
1090 struct nlattr
*port
[])
1092 struct enic
*enic
= netdev_priv(netdev
);
1093 struct enic_port_profile prev_pp
;
1094 struct enic_port_profile
*pp
;
1095 int err
= 0, restore_pp
= 1;
1097 ENIC_PP_BY_INDEX(enic
, vf
, pp
, &err
);
1101 if (!port
[IFLA_PORT_REQUEST
])
1104 memcpy(&prev_pp
, pp
, sizeof(*enic
->pp
));
1105 memset(pp
, 0, sizeof(*enic
->pp
));
1107 pp
->set
|= ENIC_SET_REQUEST
;
1108 pp
->request
= nla_get_u8(port
[IFLA_PORT_REQUEST
]);
1110 if (port
[IFLA_PORT_PROFILE
]) {
1111 pp
->set
|= ENIC_SET_NAME
;
1112 memcpy(pp
->name
, nla_data(port
[IFLA_PORT_PROFILE
]),
1116 if (port
[IFLA_PORT_INSTANCE_UUID
]) {
1117 pp
->set
|= ENIC_SET_INSTANCE
;
1118 memcpy(pp
->instance_uuid
,
1119 nla_data(port
[IFLA_PORT_INSTANCE_UUID
]), PORT_UUID_MAX
);
1122 if (port
[IFLA_PORT_HOST_UUID
]) {
1123 pp
->set
|= ENIC_SET_HOST
;
1124 memcpy(pp
->host_uuid
,
1125 nla_data(port
[IFLA_PORT_HOST_UUID
]), PORT_UUID_MAX
);
1128 if (vf
== PORT_SELF_VF
) {
1129 /* Special case handling: mac came from IFLA_VF_MAC */
1130 if (!is_zero_ether_addr(prev_pp
.vf_mac
))
1131 memcpy(pp
->mac_addr
, prev_pp
.vf_mac
, ETH_ALEN
);
1133 if (is_zero_ether_addr(netdev
->dev_addr
))
1134 eth_hw_addr_random(netdev
);
1136 /* SR-IOV VF: get mac from adapter */
1137 ENIC_DEVCMD_PROXY_BY_INDEX(vf
, err
, enic
,
1138 vnic_dev_get_mac_addr
, pp
->mac_addr
);
1140 netdev_err(netdev
, "Error getting mac for vf %d\n", vf
);
1141 memcpy(pp
, &prev_pp
, sizeof(*pp
));
1142 return enic_dev_status_to_errno(err
);
1146 err
= enic_process_set_pp_request(enic
, vf
, &prev_pp
, &restore_pp
);
1149 /* Things are still the way they were: Implicit
1150 * DISASSOCIATE failed
1152 memcpy(pp
, &prev_pp
, sizeof(*pp
));
1154 memset(pp
, 0, sizeof(*pp
));
1155 if (vf
== PORT_SELF_VF
)
1156 eth_zero_addr(netdev
->dev_addr
);
1159 /* Set flag to indicate that the port assoc/disassoc
1160 * request has been sent out to fw
1162 pp
->set
|= ENIC_PORT_REQUEST_APPLIED
;
1164 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1165 if (pp
->request
== PORT_REQUEST_DISASSOCIATE
) {
1166 eth_zero_addr(pp
->mac_addr
);
1167 if (vf
== PORT_SELF_VF
)
1168 eth_zero_addr(netdev
->dev_addr
);
1172 if (vf
== PORT_SELF_VF
)
1173 eth_zero_addr(pp
->vf_mac
);
1178 static int enic_get_vf_port(struct net_device
*netdev
, int vf
,
1179 struct sk_buff
*skb
)
1181 struct enic
*enic
= netdev_priv(netdev
);
1182 u16 response
= PORT_PROFILE_RESPONSE_SUCCESS
;
1183 struct enic_port_profile
*pp
;
1186 ENIC_PP_BY_INDEX(enic
, vf
, pp
, &err
);
1190 if (!(pp
->set
& ENIC_PORT_REQUEST_APPLIED
))
1193 err
= enic_process_get_pp_request(enic
, vf
, pp
->request
, &response
);
1197 if (nla_put_u16(skb
, IFLA_PORT_REQUEST
, pp
->request
) ||
1198 nla_put_u16(skb
, IFLA_PORT_RESPONSE
, response
) ||
1199 ((pp
->set
& ENIC_SET_NAME
) &&
1200 nla_put(skb
, IFLA_PORT_PROFILE
, PORT_PROFILE_MAX
, pp
->name
)) ||
1201 ((pp
->set
& ENIC_SET_INSTANCE
) &&
1202 nla_put(skb
, IFLA_PORT_INSTANCE_UUID
, PORT_UUID_MAX
,
1203 pp
->instance_uuid
)) ||
1204 ((pp
->set
& ENIC_SET_HOST
) &&
1205 nla_put(skb
, IFLA_PORT_HOST_UUID
, PORT_UUID_MAX
, pp
->host_uuid
)))
1206 goto nla_put_failure
;
1213 static void enic_free_rq_buf(struct vnic_rq
*rq
, struct vnic_rq_buf
*buf
)
1215 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
1220 pci_unmap_single(enic
->pdev
, buf
->dma_addr
,
1221 buf
->len
, PCI_DMA_FROMDEVICE
);
1222 dev_kfree_skb_any(buf
->os_buf
);
1226 static int enic_rq_alloc_buf(struct vnic_rq
*rq
)
1228 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
1229 struct net_device
*netdev
= enic
->netdev
;
1230 struct sk_buff
*skb
;
1231 unsigned int len
= netdev
->mtu
+ VLAN_ETH_HLEN
;
1232 unsigned int os_buf_index
= 0;
1233 dma_addr_t dma_addr
;
1234 struct vnic_rq_buf
*buf
= rq
->to_use
;
1237 enic_queue_rq_desc(rq
, buf
->os_buf
, os_buf_index
, buf
->dma_addr
,
1242 skb
= netdev_alloc_skb_ip_align(netdev
, len
);
1246 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
, len
,
1247 PCI_DMA_FROMDEVICE
);
1248 if (unlikely(enic_dma_map_check(enic
, dma_addr
))) {
1253 enic_queue_rq_desc(rq
, skb
, os_buf_index
,
1259 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter
*pkt_size
,
1262 if (ENIC_LARGE_PKT_THRESHOLD
<= pkt_len
)
1263 pkt_size
->large_pkt_bytes_cnt
+= pkt_len
;
1265 pkt_size
->small_pkt_bytes_cnt
+= pkt_len
;
1268 static bool enic_rxcopybreak(struct net_device
*netdev
, struct sk_buff
**skb
,
1269 struct vnic_rq_buf
*buf
, u16 len
)
1271 struct enic
*enic
= netdev_priv(netdev
);
1272 struct sk_buff
*new_skb
;
1274 if (len
> enic
->rx_copybreak
)
1276 new_skb
= netdev_alloc_skb_ip_align(netdev
, len
);
1279 pci_dma_sync_single_for_cpu(enic
->pdev
, buf
->dma_addr
, len
,
1281 memcpy(new_skb
->data
, (*skb
)->data
, len
);
1287 static void enic_rq_indicate_buf(struct vnic_rq
*rq
,
1288 struct cq_desc
*cq_desc
, struct vnic_rq_buf
*buf
,
1289 int skipped
, void *opaque
)
1291 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
1292 struct net_device
*netdev
= enic
->netdev
;
1293 struct sk_buff
*skb
;
1294 struct vnic_cq
*cq
= &enic
->cq
[enic_cq_rq(enic
, rq
->index
)];
1296 u8 type
, color
, eop
, sop
, ingress_port
, vlan_stripped
;
1297 u8 fcoe
, fcoe_sof
, fcoe_fc_crc_ok
, fcoe_enc_error
, fcoe_eof
;
1298 u8 tcp_udp_csum_ok
, udp
, tcp
, ipv4_csum_ok
;
1299 u8 ipv6
, ipv4
, ipv4_fragment
, fcs_ok
, rss_type
, csum_not_calc
;
1301 u16 q_number
, completed_index
, bytes_written
, vlan_tci
, checksum
;
1303 bool outer_csum_ok
= true, encap
= false;
1310 cq_enet_rq_desc_dec((struct cq_enet_rq_desc
*)cq_desc
,
1311 &type
, &color
, &q_number
, &completed_index
,
1312 &ingress_port
, &fcoe
, &eop
, &sop
, &rss_type
,
1313 &csum_not_calc
, &rss_hash
, &bytes_written
,
1314 &packet_error
, &vlan_stripped
, &vlan_tci
, &checksum
,
1315 &fcoe_sof
, &fcoe_fc_crc_ok
, &fcoe_enc_error
,
1316 &fcoe_eof
, &tcp_udp_csum_ok
, &udp
, &tcp
,
1317 &ipv4_csum_ok
, &ipv6
, &ipv4
, &ipv4_fragment
,
1323 if (bytes_written
> 0)
1325 else if (bytes_written
== 0)
1326 enic
->rq_truncated_pkts
++;
1329 pci_unmap_single(enic
->pdev
, buf
->dma_addr
, buf
->len
,
1330 PCI_DMA_FROMDEVICE
);
1331 dev_kfree_skb_any(skb
);
1337 if (eop
&& bytes_written
> 0) {
1342 if (!enic_rxcopybreak(netdev
, &skb
, buf
, bytes_written
)) {
1344 pci_unmap_single(enic
->pdev
, buf
->dma_addr
, buf
->len
,
1345 PCI_DMA_FROMDEVICE
);
1347 prefetch(skb
->data
- NET_IP_ALIGN
);
1349 skb_put(skb
, bytes_written
);
1350 skb
->protocol
= eth_type_trans(skb
, netdev
);
1351 skb_record_rx_queue(skb
, q_number
);
1352 if ((netdev
->features
& NETIF_F_RXHASH
) && rss_hash
&&
1355 case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4
:
1356 case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6
:
1357 case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX
:
1358 skb_set_hash(skb
, rss_hash
, PKT_HASH_TYPE_L4
);
1360 case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4
:
1361 case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6
:
1362 case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX
:
1363 skb_set_hash(skb
, rss_hash
, PKT_HASH_TYPE_L3
);
1367 if (enic
->vxlan
.vxlan_udp_port_number
) {
1368 switch (enic
->vxlan
.patch_level
) {
1372 outer_csum_ok
= fcoe_fc_crc_ok
;
1377 (rss_hash
& BIT(0))) {
1379 outer_csum_ok
= (rss_hash
& BIT(1)) &&
1380 (rss_hash
& BIT(2));
1386 /* Hardware does not provide whole packet checksum. It only
1387 * provides pseudo checksum. Since hw validates the packet
1388 * checksum but not provide us the checksum value. use
1389 * CHECSUM_UNNECESSARY.
1391 * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is
1392 * inner csum_ok. outer_csum_ok is set by hw when outer udp
1393 * csum is correct or is zero.
1395 if ((netdev
->features
& NETIF_F_RXCSUM
) && !csum_not_calc
&&
1396 tcp_udp_csum_ok
&& ipv4_csum_ok
&& outer_csum_ok
) {
1397 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1398 skb
->csum_level
= encap
;
1402 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vlan_tci
);
1404 skb_mark_napi_id(skb
, &enic
->napi
[rq
->index
]);
1405 if (!(netdev
->features
& NETIF_F_GRO
))
1406 netif_receive_skb(skb
);
1408 napi_gro_receive(&enic
->napi
[q_number
], skb
);
1409 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1410 enic_intr_update_pkt_size(&cq
->pkt_size_counter
,
1417 pci_unmap_single(enic
->pdev
, buf
->dma_addr
, buf
->len
,
1418 PCI_DMA_FROMDEVICE
);
1419 dev_kfree_skb_any(skb
);
1424 static int enic_rq_service(struct vnic_dev
*vdev
, struct cq_desc
*cq_desc
,
1425 u8 type
, u16 q_number
, u16 completed_index
, void *opaque
)
1427 struct enic
*enic
= vnic_dev_priv(vdev
);
1429 vnic_rq_service(&enic
->rq
[q_number
], cq_desc
,
1430 completed_index
, VNIC_RQ_RETURN_DESC
,
1431 enic_rq_indicate_buf
, opaque
);
1436 static void enic_set_int_moderation(struct enic
*enic
, struct vnic_rq
*rq
)
1438 unsigned int intr
= enic_msix_rq_intr(enic
, rq
->index
);
1439 struct vnic_cq
*cq
= &enic
->cq
[enic_cq_rq(enic
, rq
->index
)];
1440 u32 timer
= cq
->tobe_rx_coal_timeval
;
1442 if (cq
->tobe_rx_coal_timeval
!= cq
->cur_rx_coal_timeval
) {
1443 vnic_intr_coalescing_timer_set(&enic
->intr
[intr
], timer
);
1444 cq
->cur_rx_coal_timeval
= cq
->tobe_rx_coal_timeval
;
1448 static void enic_calc_int_moderation(struct enic
*enic
, struct vnic_rq
*rq
)
1450 struct enic_rx_coal
*rx_coal
= &enic
->rx_coalesce_setting
;
1451 struct vnic_cq
*cq
= &enic
->cq
[enic_cq_rq(enic
, rq
->index
)];
1452 struct vnic_rx_bytes_counter
*pkt_size_counter
= &cq
->pkt_size_counter
;
1458 ktime_t now
= ktime_get();
1460 delta
= ktime_us_delta(now
, cq
->prev_ts
);
1461 if (delta
< ENIC_AIC_TS_BREAK
)
1465 traffic
= pkt_size_counter
->large_pkt_bytes_cnt
+
1466 pkt_size_counter
->small_pkt_bytes_cnt
;
1467 /* The table takes Mbps
1468 * traffic *= 8 => bits
1469 * traffic *= (10^6 / delta) => bps
1470 * traffic /= 10^6 => Mbps
1472 * Combining, traffic *= (8 / delta)
1476 traffic
= delta
> UINT_MAX
? 0 : traffic
/ (u32
)delta
;
1478 for (index
= 0; index
< ENIC_MAX_COALESCE_TIMERS
; index
++)
1479 if (traffic
< mod_table
[index
].rx_rate
)
1481 range_start
= (pkt_size_counter
->small_pkt_bytes_cnt
>
1482 pkt_size_counter
->large_pkt_bytes_cnt
<< 1) ?
1483 rx_coal
->small_pkt_range_start
:
1484 rx_coal
->large_pkt_range_start
;
1485 timer
= range_start
+ ((rx_coal
->range_end
- range_start
) *
1486 mod_table
[index
].range_percent
/ 100);
1488 cq
->tobe_rx_coal_timeval
= (timer
+ cq
->tobe_rx_coal_timeval
) >> 1;
1490 pkt_size_counter
->large_pkt_bytes_cnt
= 0;
1491 pkt_size_counter
->small_pkt_bytes_cnt
= 0;
1494 static int enic_poll(struct napi_struct
*napi
, int budget
)
1496 struct net_device
*netdev
= napi
->dev
;
1497 struct enic
*enic
= netdev_priv(netdev
);
1498 unsigned int cq_rq
= enic_cq_rq(enic
, 0);
1499 unsigned int cq_wq
= enic_cq_wq(enic
, 0);
1500 unsigned int intr
= enic_legacy_io_intr();
1501 unsigned int rq_work_to_do
= budget
;
1502 unsigned int wq_work_to_do
= -1; /* no limit */
1503 unsigned int work_done
, rq_work_done
= 0, wq_work_done
;
1506 wq_work_done
= vnic_cq_service(&enic
->cq
[cq_wq
], wq_work_to_do
,
1507 enic_wq_service
, NULL
);
1510 rq_work_done
= vnic_cq_service(&enic
->cq
[cq_rq
],
1511 rq_work_to_do
, enic_rq_service
, NULL
);
1513 /* Accumulate intr event credits for this polling
1514 * cycle. An intr event is the completion of a
1515 * a WQ or RQ packet.
1518 work_done
= rq_work_done
+ wq_work_done
;
1521 vnic_intr_return_credits(&enic
->intr
[intr
],
1523 0 /* don't unmask intr */,
1524 0 /* don't reset intr timer */);
1526 err
= vnic_rq_fill(&enic
->rq
[0], enic_rq_alloc_buf
);
1528 /* Buffer allocation failed. Stay in polling
1529 * mode so we can try to fill the ring again.
1533 rq_work_done
= rq_work_to_do
;
1534 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1535 /* Call the function which refreshes the intr coalescing timer
1536 * value based on the traffic.
1538 enic_calc_int_moderation(enic
, &enic
->rq
[0]);
1540 if ((rq_work_done
< budget
) && napi_complete_done(napi
, rq_work_done
)) {
1542 /* Some work done, but not enough to stay in polling,
1546 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1547 enic_set_int_moderation(enic
, &enic
->rq
[0]);
1548 vnic_intr_unmask(&enic
->intr
[intr
]);
1551 return rq_work_done
;
1554 #ifdef CONFIG_RFS_ACCEL
1555 static void enic_free_rx_cpu_rmap(struct enic
*enic
)
1557 free_irq_cpu_rmap(enic
->netdev
->rx_cpu_rmap
);
1558 enic
->netdev
->rx_cpu_rmap
= NULL
;
1561 static void enic_set_rx_cpu_rmap(struct enic
*enic
)
1565 if (vnic_dev_get_intr_mode(enic
->vdev
) == VNIC_DEV_INTR_MODE_MSIX
) {
1566 enic
->netdev
->rx_cpu_rmap
= alloc_irq_cpu_rmap(enic
->rq_count
);
1567 if (unlikely(!enic
->netdev
->rx_cpu_rmap
))
1569 for (i
= 0; i
< enic
->rq_count
; i
++) {
1570 res
= irq_cpu_rmap_add(enic
->netdev
->rx_cpu_rmap
,
1571 enic
->msix_entry
[i
].vector
);
1572 if (unlikely(res
)) {
1573 enic_free_rx_cpu_rmap(enic
);
1582 static void enic_free_rx_cpu_rmap(struct enic
*enic
)
1586 static void enic_set_rx_cpu_rmap(struct enic
*enic
)
1590 #endif /* CONFIG_RFS_ACCEL */
1592 static int enic_poll_msix_wq(struct napi_struct
*napi
, int budget
)
1594 struct net_device
*netdev
= napi
->dev
;
1595 struct enic
*enic
= netdev_priv(netdev
);
1596 unsigned int wq_index
= (napi
- &enic
->napi
[0]) - enic
->rq_count
;
1597 struct vnic_wq
*wq
= &enic
->wq
[wq_index
];
1600 unsigned int wq_work_to_do
= -1; /* clean all desc possible */
1601 unsigned int wq_work_done
;
1602 unsigned int wq_irq
;
1605 cq
= enic_cq_wq(enic
, wq_irq
);
1606 intr
= enic_msix_wq_intr(enic
, wq_irq
);
1607 wq_work_done
= vnic_cq_service(&enic
->cq
[cq
], wq_work_to_do
,
1608 enic_wq_service
, NULL
);
1610 vnic_intr_return_credits(&enic
->intr
[intr
], wq_work_done
,
1611 0 /* don't unmask intr */,
1612 1 /* reset intr timer */);
1613 if (!wq_work_done
) {
1614 napi_complete(napi
);
1615 vnic_intr_unmask(&enic
->intr
[intr
]);
1622 static int enic_poll_msix_rq(struct napi_struct
*napi
, int budget
)
1624 struct net_device
*netdev
= napi
->dev
;
1625 struct enic
*enic
= netdev_priv(netdev
);
1626 unsigned int rq
= (napi
- &enic
->napi
[0]);
1627 unsigned int cq
= enic_cq_rq(enic
, rq
);
1628 unsigned int intr
= enic_msix_rq_intr(enic
, rq
);
1629 unsigned int work_to_do
= budget
;
1630 unsigned int work_done
= 0;
1637 work_done
= vnic_cq_service(&enic
->cq
[cq
],
1638 work_to_do
, enic_rq_service
, NULL
);
1640 /* Return intr event credits for this polling
1641 * cycle. An intr event is the completion of a
1646 vnic_intr_return_credits(&enic
->intr
[intr
],
1648 0 /* don't unmask intr */,
1649 0 /* don't reset intr timer */);
1651 err
= vnic_rq_fill(&enic
->rq
[rq
], enic_rq_alloc_buf
);
1653 /* Buffer allocation failed. Stay in polling mode
1654 * so we can try to fill the ring again.
1658 work_done
= work_to_do
;
1659 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1660 /* Call the function which refreshes the intr coalescing timer
1661 * value based on the traffic.
1663 enic_calc_int_moderation(enic
, &enic
->rq
[rq
]);
1665 if ((work_done
< budget
) && napi_complete_done(napi
, work_done
)) {
1667 /* Some work done, but not enough to stay in polling,
1671 if (enic
->rx_coalesce_setting
.use_adaptive_rx_coalesce
)
1672 enic_set_int_moderation(enic
, &enic
->rq
[rq
]);
1673 vnic_intr_unmask(&enic
->intr
[intr
]);
1679 static void enic_notify_timer(unsigned long data
)
1681 struct enic
*enic
= (struct enic
*)data
;
1683 enic_notify_check(enic
);
1685 mod_timer(&enic
->notify_timer
,
1686 round_jiffies(jiffies
+ ENIC_NOTIFY_TIMER_PERIOD
));
1689 static void enic_free_intr(struct enic
*enic
)
1691 struct net_device
*netdev
= enic
->netdev
;
1694 enic_free_rx_cpu_rmap(enic
);
1695 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1696 case VNIC_DEV_INTR_MODE_INTX
:
1697 free_irq(enic
->pdev
->irq
, netdev
);
1699 case VNIC_DEV_INTR_MODE_MSI
:
1700 free_irq(enic
->pdev
->irq
, enic
);
1702 case VNIC_DEV_INTR_MODE_MSIX
:
1703 for (i
= 0; i
< ARRAY_SIZE(enic
->msix
); i
++)
1704 if (enic
->msix
[i
].requested
)
1705 free_irq(enic
->msix_entry
[i
].vector
,
1706 enic
->msix
[i
].devid
);
1713 static int enic_request_intr(struct enic
*enic
)
1715 struct net_device
*netdev
= enic
->netdev
;
1716 unsigned int i
, intr
;
1719 enic_set_rx_cpu_rmap(enic
);
1720 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1722 case VNIC_DEV_INTR_MODE_INTX
:
1724 err
= request_irq(enic
->pdev
->irq
, enic_isr_legacy
,
1725 IRQF_SHARED
, netdev
->name
, netdev
);
1728 case VNIC_DEV_INTR_MODE_MSI
:
1730 err
= request_irq(enic
->pdev
->irq
, enic_isr_msi
,
1731 0, netdev
->name
, enic
);
1734 case VNIC_DEV_INTR_MODE_MSIX
:
1736 for (i
= 0; i
< enic
->rq_count
; i
++) {
1737 intr
= enic_msix_rq_intr(enic
, i
);
1738 snprintf(enic
->msix
[intr
].devname
,
1739 sizeof(enic
->msix
[intr
].devname
),
1740 "%s-rx-%u", netdev
->name
, i
);
1741 enic
->msix
[intr
].isr
= enic_isr_msix
;
1742 enic
->msix
[intr
].devid
= &enic
->napi
[i
];
1745 for (i
= 0; i
< enic
->wq_count
; i
++) {
1746 int wq
= enic_cq_wq(enic
, i
);
1748 intr
= enic_msix_wq_intr(enic
, i
);
1749 snprintf(enic
->msix
[intr
].devname
,
1750 sizeof(enic
->msix
[intr
].devname
),
1751 "%s-tx-%u", netdev
->name
, i
);
1752 enic
->msix
[intr
].isr
= enic_isr_msix
;
1753 enic
->msix
[intr
].devid
= &enic
->napi
[wq
];
1756 intr
= enic_msix_err_intr(enic
);
1757 snprintf(enic
->msix
[intr
].devname
,
1758 sizeof(enic
->msix
[intr
].devname
),
1759 "%s-err", netdev
->name
);
1760 enic
->msix
[intr
].isr
= enic_isr_msix_err
;
1761 enic
->msix
[intr
].devid
= enic
;
1763 intr
= enic_msix_notify_intr(enic
);
1764 snprintf(enic
->msix
[intr
].devname
,
1765 sizeof(enic
->msix
[intr
].devname
),
1766 "%s-notify", netdev
->name
);
1767 enic
->msix
[intr
].isr
= enic_isr_msix_notify
;
1768 enic
->msix
[intr
].devid
= enic
;
1770 for (i
= 0; i
< ARRAY_SIZE(enic
->msix
); i
++)
1771 enic
->msix
[i
].requested
= 0;
1773 for (i
= 0; i
< enic
->intr_count
; i
++) {
1774 err
= request_irq(enic
->msix_entry
[i
].vector
,
1775 enic
->msix
[i
].isr
, 0,
1776 enic
->msix
[i
].devname
,
1777 enic
->msix
[i
].devid
);
1779 enic_free_intr(enic
);
1782 enic
->msix
[i
].requested
= 1;
1794 static void enic_synchronize_irqs(struct enic
*enic
)
1798 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1799 case VNIC_DEV_INTR_MODE_INTX
:
1800 case VNIC_DEV_INTR_MODE_MSI
:
1801 synchronize_irq(enic
->pdev
->irq
);
1803 case VNIC_DEV_INTR_MODE_MSIX
:
1804 for (i
= 0; i
< enic
->intr_count
; i
++)
1805 synchronize_irq(enic
->msix_entry
[i
].vector
);
1812 static void enic_set_rx_coal_setting(struct enic
*enic
)
1816 struct enic_rx_coal
*rx_coal
= &enic
->rx_coalesce_setting
;
1818 /* 1. Read the link speed from fw
1819 * 2. Pick the default range for the speed
1820 * 3. Update it in enic->rx_coalesce_setting
1822 speed
= vnic_dev_port_speed(enic
->vdev
);
1823 if (ENIC_LINK_SPEED_10G
< speed
)
1824 index
= ENIC_LINK_40G_INDEX
;
1825 else if (ENIC_LINK_SPEED_4G
< speed
)
1826 index
= ENIC_LINK_10G_INDEX
;
1828 index
= ENIC_LINK_4G_INDEX
;
1830 rx_coal
->small_pkt_range_start
= mod_range
[index
].small_pkt_range_start
;
1831 rx_coal
->large_pkt_range_start
= mod_range
[index
].large_pkt_range_start
;
1832 rx_coal
->range_end
= ENIC_RX_COALESCE_RANGE_END
;
1834 /* Start with the value provided by UCSM */
1835 for (index
= 0; index
< enic
->rq_count
; index
++)
1836 enic
->cq
[index
].cur_rx_coal_timeval
=
1837 enic
->config
.intr_timer_usec
;
1839 rx_coal
->use_adaptive_rx_coalesce
= 1;
1842 static int enic_dev_notify_set(struct enic
*enic
)
1846 spin_lock_bh(&enic
->devcmd_lock
);
1847 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1848 case VNIC_DEV_INTR_MODE_INTX
:
1849 err
= vnic_dev_notify_set(enic
->vdev
,
1850 enic_legacy_notify_intr());
1852 case VNIC_DEV_INTR_MODE_MSIX
:
1853 err
= vnic_dev_notify_set(enic
->vdev
,
1854 enic_msix_notify_intr(enic
));
1857 err
= vnic_dev_notify_set(enic
->vdev
, -1 /* no intr */);
1860 spin_unlock_bh(&enic
->devcmd_lock
);
1865 static void enic_notify_timer_start(struct enic
*enic
)
1867 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1868 case VNIC_DEV_INTR_MODE_MSI
:
1869 mod_timer(&enic
->notify_timer
, jiffies
);
1872 /* Using intr for notification for INTx/MSI-X */
1877 /* rtnl lock is held, process context */
1878 static int enic_open(struct net_device
*netdev
)
1880 struct enic
*enic
= netdev_priv(netdev
);
1884 err
= enic_request_intr(enic
);
1886 netdev_err(netdev
, "Unable to request irq.\n");
1889 enic_init_affinity_hint(enic
);
1890 enic_set_affinity_hint(enic
);
1892 err
= enic_dev_notify_set(enic
);
1895 "Failed to alloc notify buffer, aborting.\n");
1896 goto err_out_free_intr
;
1899 for (i
= 0; i
< enic
->rq_count
; i
++) {
1900 vnic_rq_fill(&enic
->rq
[i
], enic_rq_alloc_buf
);
1901 /* Need at least one buffer on ring to get going */
1902 if (vnic_rq_desc_used(&enic
->rq
[i
]) == 0) {
1903 netdev_err(netdev
, "Unable to alloc receive buffers\n");
1905 goto err_out_free_rq
;
1909 for (i
= 0; i
< enic
->wq_count
; i
++)
1910 vnic_wq_enable(&enic
->wq
[i
]);
1911 for (i
= 0; i
< enic
->rq_count
; i
++)
1912 vnic_rq_enable(&enic
->rq
[i
]);
1914 if (!enic_is_dynamic(enic
) && !enic_is_sriov_vf(enic
))
1915 enic_dev_add_station_addr(enic
);
1917 enic_set_rx_mode(netdev
);
1919 netif_tx_wake_all_queues(netdev
);
1921 for (i
= 0; i
< enic
->rq_count
; i
++)
1922 napi_enable(&enic
->napi
[i
]);
1924 if (vnic_dev_get_intr_mode(enic
->vdev
) == VNIC_DEV_INTR_MODE_MSIX
)
1925 for (i
= 0; i
< enic
->wq_count
; i
++)
1926 napi_enable(&enic
->napi
[enic_cq_wq(enic
, i
)]);
1927 enic_dev_enable(enic
);
1929 for (i
= 0; i
< enic
->intr_count
; i
++)
1930 vnic_intr_unmask(&enic
->intr
[i
]);
1932 enic_notify_timer_start(enic
);
1933 enic_rfs_flw_tbl_init(enic
);
1938 for (i
= 0; i
< enic
->rq_count
; i
++)
1939 vnic_rq_clean(&enic
->rq
[i
], enic_free_rq_buf
);
1940 enic_dev_notify_unset(enic
);
1942 enic_unset_affinity_hint(enic
);
1943 enic_free_intr(enic
);
1948 /* rtnl lock is held, process context */
1949 static int enic_stop(struct net_device
*netdev
)
1951 struct enic
*enic
= netdev_priv(netdev
);
1955 for (i
= 0; i
< enic
->intr_count
; i
++) {
1956 vnic_intr_mask(&enic
->intr
[i
]);
1957 (void)vnic_intr_masked(&enic
->intr
[i
]); /* flush write */
1960 enic_synchronize_irqs(enic
);
1962 del_timer_sync(&enic
->notify_timer
);
1963 enic_rfs_flw_tbl_free(enic
);
1965 enic_dev_disable(enic
);
1967 for (i
= 0; i
< enic
->rq_count
; i
++)
1968 napi_disable(&enic
->napi
[i
]);
1970 netif_carrier_off(netdev
);
1971 netif_tx_disable(netdev
);
1972 if (vnic_dev_get_intr_mode(enic
->vdev
) == VNIC_DEV_INTR_MODE_MSIX
)
1973 for (i
= 0; i
< enic
->wq_count
; i
++)
1974 napi_disable(&enic
->napi
[enic_cq_wq(enic
, i
)]);
1976 if (!enic_is_dynamic(enic
) && !enic_is_sriov_vf(enic
))
1977 enic_dev_del_station_addr(enic
);
1979 for (i
= 0; i
< enic
->wq_count
; i
++) {
1980 err
= vnic_wq_disable(&enic
->wq
[i
]);
1984 for (i
= 0; i
< enic
->rq_count
; i
++) {
1985 err
= vnic_rq_disable(&enic
->rq
[i
]);
1990 enic_dev_notify_unset(enic
);
1991 enic_unset_affinity_hint(enic
);
1992 enic_free_intr(enic
);
1994 for (i
= 0; i
< enic
->wq_count
; i
++)
1995 vnic_wq_clean(&enic
->wq
[i
], enic_free_wq_buf
);
1996 for (i
= 0; i
< enic
->rq_count
; i
++)
1997 vnic_rq_clean(&enic
->rq
[i
], enic_free_rq_buf
);
1998 for (i
= 0; i
< enic
->cq_count
; i
++)
1999 vnic_cq_clean(&enic
->cq
[i
]);
2000 for (i
= 0; i
< enic
->intr_count
; i
++)
2001 vnic_intr_clean(&enic
->intr
[i
]);
2006 static int enic_change_mtu(struct net_device
*netdev
, int new_mtu
)
2008 struct enic
*enic
= netdev_priv(netdev
);
2009 int running
= netif_running(netdev
);
2011 if (enic_is_dynamic(enic
) || enic_is_sriov_vf(enic
))
2017 netdev
->mtu
= new_mtu
;
2019 if (netdev
->mtu
> enic
->port_mtu
)
2021 "interface MTU (%d) set higher than port MTU (%d)\n",
2022 netdev
->mtu
, enic
->port_mtu
);
2030 static void enic_change_mtu_work(struct work_struct
*work
)
2032 struct enic
*enic
= container_of(work
, struct enic
, change_mtu_work
);
2033 struct net_device
*netdev
= enic
->netdev
;
2034 int new_mtu
= vnic_dev_mtu(enic
->vdev
);
2038 new_mtu
= max_t(int, ENIC_MIN_MTU
, min_t(int, ENIC_MAX_MTU
, new_mtu
));
2043 del_timer_sync(&enic
->notify_timer
);
2045 for (i
= 0; i
< enic
->rq_count
; i
++)
2046 napi_disable(&enic
->napi
[i
]);
2048 vnic_intr_mask(&enic
->intr
[0]);
2049 enic_synchronize_irqs(enic
);
2050 err
= vnic_rq_disable(&enic
->rq
[0]);
2053 netdev_err(netdev
, "Unable to disable RQ.\n");
2056 vnic_rq_clean(&enic
->rq
[0], enic_free_rq_buf
);
2057 vnic_cq_clean(&enic
->cq
[0]);
2058 vnic_intr_clean(&enic
->intr
[0]);
2060 /* Fill RQ with new_mtu-sized buffers */
2061 netdev
->mtu
= new_mtu
;
2062 vnic_rq_fill(&enic
->rq
[0], enic_rq_alloc_buf
);
2063 /* Need at least one buffer on ring to get going */
2064 if (vnic_rq_desc_used(&enic
->rq
[0]) == 0) {
2066 netdev_err(netdev
, "Unable to alloc receive buffers.\n");
2071 vnic_rq_enable(&enic
->rq
[0]);
2072 napi_enable(&enic
->napi
[0]);
2073 vnic_intr_unmask(&enic
->intr
[0]);
2074 enic_notify_timer_start(enic
);
2078 netdev_info(netdev
, "interface MTU set as %d\n", netdev
->mtu
);
2081 #ifdef CONFIG_NET_POLL_CONTROLLER
2082 static void enic_poll_controller(struct net_device
*netdev
)
2084 struct enic
*enic
= netdev_priv(netdev
);
2085 struct vnic_dev
*vdev
= enic
->vdev
;
2086 unsigned int i
, intr
;
2088 switch (vnic_dev_get_intr_mode(vdev
)) {
2089 case VNIC_DEV_INTR_MODE_MSIX
:
2090 for (i
= 0; i
< enic
->rq_count
; i
++) {
2091 intr
= enic_msix_rq_intr(enic
, i
);
2092 enic_isr_msix(enic
->msix_entry
[intr
].vector
,
2096 for (i
= 0; i
< enic
->wq_count
; i
++) {
2097 intr
= enic_msix_wq_intr(enic
, i
);
2098 enic_isr_msix(enic
->msix_entry
[intr
].vector
,
2099 &enic
->napi
[enic_cq_wq(enic
, i
)]);
2103 case VNIC_DEV_INTR_MODE_MSI
:
2104 enic_isr_msi(enic
->pdev
->irq
, enic
);
2106 case VNIC_DEV_INTR_MODE_INTX
:
2107 enic_isr_legacy(enic
->pdev
->irq
, netdev
);
2115 static int enic_dev_wait(struct vnic_dev
*vdev
,
2116 int (*start
)(struct vnic_dev
*, int),
2117 int (*finished
)(struct vnic_dev
*, int *),
2124 BUG_ON(in_interrupt());
2126 err
= start(vdev
, arg
);
2130 /* Wait for func to complete...2 seconds max
2133 time
= jiffies
+ (HZ
* 2);
2136 err
= finished(vdev
, &done
);
2143 schedule_timeout_uninterruptible(HZ
/ 10);
2145 } while (time_after(time
, jiffies
));
2150 static int enic_dev_open(struct enic
*enic
)
2154 err
= enic_dev_wait(enic
->vdev
, vnic_dev_open
,
2155 vnic_dev_open_done
, 0);
2157 dev_err(enic_get_dev(enic
), "vNIC device open failed, err %d\n",
2163 static int enic_dev_soft_reset(struct enic
*enic
)
2167 err
= enic_dev_wait(enic
->vdev
, vnic_dev_soft_reset
,
2168 vnic_dev_soft_reset_done
, 0);
2170 netdev_err(enic
->netdev
, "vNIC soft reset failed, err %d\n",
2176 static int enic_dev_hang_reset(struct enic
*enic
)
2180 err
= enic_dev_wait(enic
->vdev
, vnic_dev_hang_reset
,
2181 vnic_dev_hang_reset_done
, 0);
2183 netdev_err(enic
->netdev
, "vNIC hang reset failed, err %d\n",
2189 int __enic_set_rsskey(struct enic
*enic
)
2191 union vnic_rss_key
*rss_key_buf_va
;
2192 dma_addr_t rss_key_buf_pa
;
2193 int i
, kidx
, bidx
, err
;
2195 rss_key_buf_va
= pci_zalloc_consistent(enic
->pdev
,
2196 sizeof(union vnic_rss_key
),
2198 if (!rss_key_buf_va
)
2201 for (i
= 0; i
< ENIC_RSS_LEN
; i
++) {
2202 kidx
= i
/ ENIC_RSS_BYTES_PER_KEY
;
2203 bidx
= i
% ENIC_RSS_BYTES_PER_KEY
;
2204 rss_key_buf_va
->key
[kidx
].b
[bidx
] = enic
->rss_key
[i
];
2206 spin_lock_bh(&enic
->devcmd_lock
);
2207 err
= enic_set_rss_key(enic
,
2209 sizeof(union vnic_rss_key
));
2210 spin_unlock_bh(&enic
->devcmd_lock
);
2212 pci_free_consistent(enic
->pdev
, sizeof(union vnic_rss_key
),
2213 rss_key_buf_va
, rss_key_buf_pa
);
2218 static int enic_set_rsskey(struct enic
*enic
)
2220 netdev_rss_key_fill(enic
->rss_key
, ENIC_RSS_LEN
);
2222 return __enic_set_rsskey(enic
);
2225 static int enic_set_rsscpu(struct enic
*enic
, u8 rss_hash_bits
)
2227 dma_addr_t rss_cpu_buf_pa
;
2228 union vnic_rss_cpu
*rss_cpu_buf_va
= NULL
;
2232 rss_cpu_buf_va
= pci_alloc_consistent(enic
->pdev
,
2233 sizeof(union vnic_rss_cpu
), &rss_cpu_buf_pa
);
2234 if (!rss_cpu_buf_va
)
2237 for (i
= 0; i
< (1 << rss_hash_bits
); i
++)
2238 (*rss_cpu_buf_va
).cpu
[i
/4].b
[i
%4] = i
% enic
->rq_count
;
2240 spin_lock_bh(&enic
->devcmd_lock
);
2241 err
= enic_set_rss_cpu(enic
,
2243 sizeof(union vnic_rss_cpu
));
2244 spin_unlock_bh(&enic
->devcmd_lock
);
2246 pci_free_consistent(enic
->pdev
, sizeof(union vnic_rss_cpu
),
2247 rss_cpu_buf_va
, rss_cpu_buf_pa
);
2252 static int enic_set_niccfg(struct enic
*enic
, u8 rss_default_cpu
,
2253 u8 rss_hash_type
, u8 rss_hash_bits
, u8 rss_base_cpu
, u8 rss_enable
)
2255 const u8 tso_ipid_split_en
= 0;
2256 const u8 ig_vlan_strip_en
= 1;
2259 /* Enable VLAN tag stripping.
2262 spin_lock_bh(&enic
->devcmd_lock
);
2263 err
= enic_set_nic_cfg(enic
,
2264 rss_default_cpu
, rss_hash_type
,
2265 rss_hash_bits
, rss_base_cpu
,
2266 rss_enable
, tso_ipid_split_en
,
2268 spin_unlock_bh(&enic
->devcmd_lock
);
2273 static int enic_set_rss_nic_cfg(struct enic
*enic
)
2275 struct device
*dev
= enic_get_dev(enic
);
2276 const u8 rss_default_cpu
= 0;
2277 const u8 rss_hash_type
= NIC_CFG_RSS_HASH_TYPE_IPV4
|
2278 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4
|
2279 NIC_CFG_RSS_HASH_TYPE_IPV6
|
2280 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6
;
2281 const u8 rss_hash_bits
= 7;
2282 const u8 rss_base_cpu
= 0;
2283 u8 rss_enable
= ENIC_SETTING(enic
, RSS
) && (enic
->rq_count
> 1);
2286 if (!enic_set_rsskey(enic
)) {
2287 if (enic_set_rsscpu(enic
, rss_hash_bits
)) {
2289 dev_warn(dev
, "RSS disabled, "
2290 "Failed to set RSS cpu indirection table.");
2294 dev_warn(dev
, "RSS disabled, Failed to set RSS key.\n");
2298 return enic_set_niccfg(enic
, rss_default_cpu
, rss_hash_type
,
2299 rss_hash_bits
, rss_base_cpu
, rss_enable
);
2302 static void enic_reset(struct work_struct
*work
)
2304 struct enic
*enic
= container_of(work
, struct enic
, reset
);
2306 if (!netif_running(enic
->netdev
))
2311 spin_lock(&enic
->enic_api_lock
);
2312 enic_stop(enic
->netdev
);
2313 enic_dev_soft_reset(enic
);
2314 enic_reset_addr_lists(enic
);
2315 enic_init_vnic_resources(enic
);
2316 enic_set_rss_nic_cfg(enic
);
2317 enic_dev_set_ig_vlan_rewrite_mode(enic
);
2318 enic_open(enic
->netdev
);
2319 spin_unlock(&enic
->enic_api_lock
);
2320 call_netdevice_notifiers(NETDEV_REBOOT
, enic
->netdev
);
2325 static void enic_tx_hang_reset(struct work_struct
*work
)
2327 struct enic
*enic
= container_of(work
, struct enic
, tx_hang_reset
);
2331 spin_lock(&enic
->enic_api_lock
);
2332 enic_dev_hang_notify(enic
);
2333 enic_stop(enic
->netdev
);
2334 enic_dev_hang_reset(enic
);
2335 enic_reset_addr_lists(enic
);
2336 enic_init_vnic_resources(enic
);
2337 enic_set_rss_nic_cfg(enic
);
2338 enic_dev_set_ig_vlan_rewrite_mode(enic
);
2339 enic_open(enic
->netdev
);
2340 spin_unlock(&enic
->enic_api_lock
);
2341 call_netdevice_notifiers(NETDEV_REBOOT
, enic
->netdev
);
2346 static int enic_set_intr_mode(struct enic
*enic
)
2348 unsigned int n
= min_t(unsigned int, enic
->rq_count
, ENIC_RQ_MAX
);
2349 unsigned int m
= min_t(unsigned int, enic
->wq_count
, ENIC_WQ_MAX
);
2352 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2353 * on system capabilities.
2357 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2358 * (the second to last INTR is used for WQ/RQ errors)
2359 * (the last INTR is used for notifications)
2362 BUG_ON(ARRAY_SIZE(enic
->msix_entry
) < n
+ m
+ 2);
2363 for (i
= 0; i
< n
+ m
+ 2; i
++)
2364 enic
->msix_entry
[i
].entry
= i
;
2366 /* Use multiple RQs if RSS is enabled
2369 if (ENIC_SETTING(enic
, RSS
) &&
2370 enic
->config
.intr_mode
< 1 &&
2371 enic
->rq_count
>= n
&&
2372 enic
->wq_count
>= m
&&
2373 enic
->cq_count
>= n
+ m
&&
2374 enic
->intr_count
>= n
+ m
+ 2) {
2376 if (pci_enable_msix_range(enic
->pdev
, enic
->msix_entry
,
2377 n
+ m
+ 2, n
+ m
+ 2) > 0) {
2381 enic
->cq_count
= n
+ m
;
2382 enic
->intr_count
= n
+ m
+ 2;
2384 vnic_dev_set_intr_mode(enic
->vdev
,
2385 VNIC_DEV_INTR_MODE_MSIX
);
2391 if (enic
->config
.intr_mode
< 1 &&
2392 enic
->rq_count
>= 1 &&
2393 enic
->wq_count
>= m
&&
2394 enic
->cq_count
>= 1 + m
&&
2395 enic
->intr_count
>= 1 + m
+ 2) {
2396 if (pci_enable_msix_range(enic
->pdev
, enic
->msix_entry
,
2397 1 + m
+ 2, 1 + m
+ 2) > 0) {
2401 enic
->cq_count
= 1 + m
;
2402 enic
->intr_count
= 1 + m
+ 2;
2404 vnic_dev_set_intr_mode(enic
->vdev
,
2405 VNIC_DEV_INTR_MODE_MSIX
);
2413 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2416 if (enic
->config
.intr_mode
< 2 &&
2417 enic
->rq_count
>= 1 &&
2418 enic
->wq_count
>= 1 &&
2419 enic
->cq_count
>= 2 &&
2420 enic
->intr_count
>= 1 &&
2421 !pci_enable_msi(enic
->pdev
)) {
2426 enic
->intr_count
= 1;
2428 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_MSI
);
2435 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2436 * (the first INTR is used for WQ/RQ)
2437 * (the second INTR is used for WQ/RQ errors)
2438 * (the last INTR is used for notifications)
2441 if (enic
->config
.intr_mode
< 3 &&
2442 enic
->rq_count
>= 1 &&
2443 enic
->wq_count
>= 1 &&
2444 enic
->cq_count
>= 2 &&
2445 enic
->intr_count
>= 3) {
2450 enic
->intr_count
= 3;
2452 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_INTX
);
2457 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_UNKNOWN
);
2462 static void enic_clear_intr_mode(struct enic
*enic
)
2464 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
2465 case VNIC_DEV_INTR_MODE_MSIX
:
2466 pci_disable_msix(enic
->pdev
);
2468 case VNIC_DEV_INTR_MODE_MSI
:
2469 pci_disable_msi(enic
->pdev
);
2475 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_UNKNOWN
);
2478 static const struct net_device_ops enic_netdev_dynamic_ops
= {
2479 .ndo_open
= enic_open
,
2480 .ndo_stop
= enic_stop
,
2481 .ndo_start_xmit
= enic_hard_start_xmit
,
2482 .ndo_get_stats64
= enic_get_stats
,
2483 .ndo_validate_addr
= eth_validate_addr
,
2484 .ndo_set_rx_mode
= enic_set_rx_mode
,
2485 .ndo_set_mac_address
= enic_set_mac_address_dynamic
,
2486 .ndo_change_mtu
= enic_change_mtu
,
2487 .ndo_vlan_rx_add_vid
= enic_vlan_rx_add_vid
,
2488 .ndo_vlan_rx_kill_vid
= enic_vlan_rx_kill_vid
,
2489 .ndo_tx_timeout
= enic_tx_timeout
,
2490 .ndo_set_vf_port
= enic_set_vf_port
,
2491 .ndo_get_vf_port
= enic_get_vf_port
,
2492 .ndo_set_vf_mac
= enic_set_vf_mac
,
2493 #ifdef CONFIG_NET_POLL_CONTROLLER
2494 .ndo_poll_controller
= enic_poll_controller
,
2496 #ifdef CONFIG_RFS_ACCEL
2497 .ndo_rx_flow_steer
= enic_rx_flow_steer
,
2499 .ndo_udp_tunnel_add
= enic_udp_tunnel_add
,
2500 .ndo_udp_tunnel_del
= enic_udp_tunnel_del
,
2501 .ndo_features_check
= enic_features_check
,
2504 static const struct net_device_ops enic_netdev_ops
= {
2505 .ndo_open
= enic_open
,
2506 .ndo_stop
= enic_stop
,
2507 .ndo_start_xmit
= enic_hard_start_xmit
,
2508 .ndo_get_stats64
= enic_get_stats
,
2509 .ndo_validate_addr
= eth_validate_addr
,
2510 .ndo_set_mac_address
= enic_set_mac_address
,
2511 .ndo_set_rx_mode
= enic_set_rx_mode
,
2512 .ndo_change_mtu
= enic_change_mtu
,
2513 .ndo_vlan_rx_add_vid
= enic_vlan_rx_add_vid
,
2514 .ndo_vlan_rx_kill_vid
= enic_vlan_rx_kill_vid
,
2515 .ndo_tx_timeout
= enic_tx_timeout
,
2516 .ndo_set_vf_port
= enic_set_vf_port
,
2517 .ndo_get_vf_port
= enic_get_vf_port
,
2518 .ndo_set_vf_mac
= enic_set_vf_mac
,
2519 #ifdef CONFIG_NET_POLL_CONTROLLER
2520 .ndo_poll_controller
= enic_poll_controller
,
2522 #ifdef CONFIG_RFS_ACCEL
2523 .ndo_rx_flow_steer
= enic_rx_flow_steer
,
2525 .ndo_udp_tunnel_add
= enic_udp_tunnel_add
,
2526 .ndo_udp_tunnel_del
= enic_udp_tunnel_del
,
2527 .ndo_features_check
= enic_features_check
,
2530 static void enic_dev_deinit(struct enic
*enic
)
2534 for (i
= 0; i
< enic
->rq_count
; i
++) {
2535 napi_hash_del(&enic
->napi
[i
]);
2536 netif_napi_del(&enic
->napi
[i
]);
2538 if (vnic_dev_get_intr_mode(enic
->vdev
) == VNIC_DEV_INTR_MODE_MSIX
)
2539 for (i
= 0; i
< enic
->wq_count
; i
++)
2540 netif_napi_del(&enic
->napi
[enic_cq_wq(enic
, i
)]);
2542 enic_free_vnic_resources(enic
);
2543 enic_clear_intr_mode(enic
);
2544 enic_free_affinity_hint(enic
);
2547 static void enic_kdump_kernel_config(struct enic
*enic
)
2549 if (is_kdump_kernel()) {
2550 dev_info(enic_get_dev(enic
), "Running from within kdump kernel. Using minimal resources\n");
2553 enic
->config
.rq_desc_count
= ENIC_MIN_RQ_DESCS
;
2554 enic
->config
.wq_desc_count
= ENIC_MIN_WQ_DESCS
;
2555 enic
->config
.mtu
= min_t(u16
, 1500, enic
->config
.mtu
);
2559 static int enic_dev_init(struct enic
*enic
)
2561 struct device
*dev
= enic_get_dev(enic
);
2562 struct net_device
*netdev
= enic
->netdev
;
2566 /* Get interrupt coalesce timer info */
2567 err
= enic_dev_intr_coal_timer_info(enic
);
2569 dev_warn(dev
, "Using default conversion factor for "
2570 "interrupt coalesce timer\n");
2571 vnic_dev_intr_coal_timer_info_default(enic
->vdev
);
2574 /* Get vNIC configuration
2577 err
= enic_get_vnic_config(enic
);
2579 dev_err(dev
, "Get vNIC configuration failed, aborting\n");
2583 /* Get available resource counts
2586 enic_get_res_counts(enic
);
2588 /* modify resource count if we are in kdump_kernel
2590 enic_kdump_kernel_config(enic
);
2592 /* Set interrupt mode based on resource counts and system
2596 err
= enic_set_intr_mode(enic
);
2598 dev_err(dev
, "Failed to set intr mode based on resource "
2599 "counts and system capabilities, aborting\n");
2603 /* Allocate and configure vNIC resources
2606 err
= enic_alloc_vnic_resources(enic
);
2608 dev_err(dev
, "Failed to alloc vNIC resources, aborting\n");
2609 goto err_out_free_vnic_resources
;
2612 enic_init_vnic_resources(enic
);
2614 err
= enic_set_rss_nic_cfg(enic
);
2616 dev_err(dev
, "Failed to config nic, aborting\n");
2617 goto err_out_free_vnic_resources
;
2620 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
2622 netif_napi_add(netdev
, &enic
->napi
[0], enic_poll
, 64);
2624 case VNIC_DEV_INTR_MODE_MSIX
:
2625 for (i
= 0; i
< enic
->rq_count
; i
++) {
2626 netif_napi_add(netdev
, &enic
->napi
[i
],
2627 enic_poll_msix_rq
, NAPI_POLL_WEIGHT
);
2629 for (i
= 0; i
< enic
->wq_count
; i
++)
2630 netif_napi_add(netdev
, &enic
->napi
[enic_cq_wq(enic
, i
)],
2631 enic_poll_msix_wq
, NAPI_POLL_WEIGHT
);
2637 err_out_free_vnic_resources
:
2638 enic_free_affinity_hint(enic
);
2639 enic_clear_intr_mode(enic
);
2640 enic_free_vnic_resources(enic
);
2645 static void enic_iounmap(struct enic
*enic
)
2649 for (i
= 0; i
< ARRAY_SIZE(enic
->bar
); i
++)
2650 if (enic
->bar
[i
].vaddr
)
2651 iounmap(enic
->bar
[i
].vaddr
);
2654 static int enic_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
2656 struct device
*dev
= &pdev
->dev
;
2657 struct net_device
*netdev
;
2662 #ifdef CONFIG_PCI_IOV
2667 /* Allocate net device structure and initialize. Private
2668 * instance data is initialized to zero.
2671 netdev
= alloc_etherdev_mqs(sizeof(struct enic
),
2672 ENIC_RQ_MAX
, ENIC_WQ_MAX
);
2676 pci_set_drvdata(pdev
, netdev
);
2678 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2680 enic
= netdev_priv(netdev
);
2681 enic
->netdev
= netdev
;
2684 /* Setup PCI resources
2687 err
= pci_enable_device_mem(pdev
);
2689 dev_err(dev
, "Cannot enable PCI device, aborting\n");
2690 goto err_out_free_netdev
;
2693 err
= pci_request_regions(pdev
, DRV_NAME
);
2695 dev_err(dev
, "Cannot request PCI regions, aborting\n");
2696 goto err_out_disable_device
;
2699 pci_set_master(pdev
);
2701 /* Query PCI controller on system for DMA addressing
2702 * limitation for the device. Try 64-bit first, and
2706 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
2708 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
2710 dev_err(dev
, "No usable DMA configuration, aborting\n");
2711 goto err_out_release_regions
;
2713 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
2715 dev_err(dev
, "Unable to obtain %u-bit DMA "
2716 "for consistent allocations, aborting\n", 32);
2717 goto err_out_release_regions
;
2720 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
2722 dev_err(dev
, "Unable to obtain %u-bit DMA "
2723 "for consistent allocations, aborting\n", 64);
2724 goto err_out_release_regions
;
2729 /* Map vNIC resources from BAR0-5
2732 for (i
= 0; i
< ARRAY_SIZE(enic
->bar
); i
++) {
2733 if (!(pci_resource_flags(pdev
, i
) & IORESOURCE_MEM
))
2735 enic
->bar
[i
].len
= pci_resource_len(pdev
, i
);
2736 enic
->bar
[i
].vaddr
= pci_iomap(pdev
, i
, enic
->bar
[i
].len
);
2737 if (!enic
->bar
[i
].vaddr
) {
2738 dev_err(dev
, "Cannot memory-map BAR %d, aborting\n", i
);
2740 goto err_out_iounmap
;
2742 enic
->bar
[i
].bus_addr
= pci_resource_start(pdev
, i
);
2745 /* Register vNIC device
2748 enic
->vdev
= vnic_dev_register(NULL
, enic
, pdev
, enic
->bar
,
2749 ARRAY_SIZE(enic
->bar
));
2751 dev_err(dev
, "vNIC registration failed, aborting\n");
2753 goto err_out_iounmap
;
2756 err
= vnic_devcmd_init(enic
->vdev
);
2759 goto err_out_vnic_unregister
;
2761 #ifdef CONFIG_PCI_IOV
2762 /* Get number of subvnics */
2763 pos
= pci_find_ext_capability(pdev
, PCI_EXT_CAP_ID_SRIOV
);
2765 pci_read_config_word(pdev
, pos
+ PCI_SRIOV_TOTAL_VF
,
2767 if (enic
->num_vfs
) {
2768 err
= pci_enable_sriov(pdev
, enic
->num_vfs
);
2770 dev_err(dev
, "SRIOV enable failed, aborting."
2771 " pci_enable_sriov() returned %d\n",
2773 goto err_out_vnic_unregister
;
2775 enic
->priv_flags
|= ENIC_SRIOV_ENABLED
;
2776 num_pps
= enic
->num_vfs
;
2781 /* Allocate structure for port profiles */
2782 enic
->pp
= kcalloc(num_pps
, sizeof(*enic
->pp
), GFP_KERNEL
);
2785 goto err_out_disable_sriov_pp
;
2788 /* Issue device open to get device in known state
2791 err
= enic_dev_open(enic
);
2793 dev_err(dev
, "vNIC dev open failed, aborting\n");
2794 goto err_out_disable_sriov
;
2797 /* Setup devcmd lock
2800 spin_lock_init(&enic
->devcmd_lock
);
2801 spin_lock_init(&enic
->enic_api_lock
);
2804 * Set ingress vlan rewrite mode before vnic initialization
2807 err
= enic_dev_set_ig_vlan_rewrite_mode(enic
);
2810 "Failed to set ingress vlan rewrite mode, aborting.\n");
2811 goto err_out_dev_close
;
2814 /* Issue device init to initialize the vnic-to-switch link.
2815 * We'll start with carrier off and wait for link UP
2816 * notification later to turn on carrier. We don't need
2817 * to wait here for the vnic-to-switch link initialization
2818 * to complete; link UP notification is the indication that
2819 * the process is complete.
2822 netif_carrier_off(netdev
);
2824 /* Do not call dev_init for a dynamic vnic.
2825 * For a dynamic vnic, init_prov_info will be
2826 * called later by an upper layer.
2829 if (!enic_is_dynamic(enic
)) {
2830 err
= vnic_dev_init(enic
->vdev
, 0);
2832 dev_err(dev
, "vNIC dev init failed, aborting\n");
2833 goto err_out_dev_close
;
2837 err
= enic_dev_init(enic
);
2839 dev_err(dev
, "Device initialization failed, aborting\n");
2840 goto err_out_dev_close
;
2843 netif_set_real_num_tx_queues(netdev
, enic
->wq_count
);
2844 netif_set_real_num_rx_queues(netdev
, enic
->rq_count
);
2846 /* Setup notification timer, HW reset task, and wq locks
2849 init_timer(&enic
->notify_timer
);
2850 enic
->notify_timer
.function
= enic_notify_timer
;
2851 enic
->notify_timer
.data
= (unsigned long)enic
;
2853 enic_set_rx_coal_setting(enic
);
2854 INIT_WORK(&enic
->reset
, enic_reset
);
2855 INIT_WORK(&enic
->tx_hang_reset
, enic_tx_hang_reset
);
2856 INIT_WORK(&enic
->change_mtu_work
, enic_change_mtu_work
);
2858 for (i
= 0; i
< enic
->wq_count
; i
++)
2859 spin_lock_init(&enic
->wq_lock
[i
]);
2861 /* Register net device
2864 enic
->port_mtu
= enic
->config
.mtu
;
2865 (void)enic_change_mtu(netdev
, enic
->port_mtu
);
2867 err
= enic_set_mac_addr(netdev
, enic
->mac_addr
);
2869 dev_err(dev
, "Invalid MAC address, aborting\n");
2870 goto err_out_dev_deinit
;
2873 enic
->tx_coalesce_usecs
= enic
->config
.intr_timer_usec
;
2874 /* rx coalesce time already got initialized. This gets used
2875 * if adaptive coal is turned off
2877 enic
->rx_coalesce_usecs
= enic
->tx_coalesce_usecs
;
2879 if (enic_is_dynamic(enic
) || enic_is_sriov_vf(enic
))
2880 netdev
->netdev_ops
= &enic_netdev_dynamic_ops
;
2882 netdev
->netdev_ops
= &enic_netdev_ops
;
2884 netdev
->watchdog_timeo
= 2 * HZ
;
2885 enic_set_ethtool_ops(netdev
);
2887 netdev
->features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_CTAG_RX
;
2888 if (ENIC_SETTING(enic
, LOOP
)) {
2889 netdev
->features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
2890 enic
->loop_enable
= 1;
2891 enic
->loop_tag
= enic
->config
.loop_tag
;
2892 dev_info(dev
, "loopback tag=0x%04x\n", enic
->loop_tag
);
2894 if (ENIC_SETTING(enic
, TXCSUM
))
2895 netdev
->hw_features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
2896 if (ENIC_SETTING(enic
, TSO
))
2897 netdev
->hw_features
|= NETIF_F_TSO
|
2898 NETIF_F_TSO6
| NETIF_F_TSO_ECN
;
2899 if (ENIC_SETTING(enic
, RSS
))
2900 netdev
->hw_features
|= NETIF_F_RXHASH
;
2901 if (ENIC_SETTING(enic
, RXCSUM
))
2902 netdev
->hw_features
|= NETIF_F_RXCSUM
;
2903 if (ENIC_SETTING(enic
, VXLAN
)) {
2906 netdev
->hw_enc_features
|= NETIF_F_RXCSUM
|
2909 NETIF_F_GSO_UDP_TUNNEL
|
2911 NETIF_F_GSO_UDP_TUNNEL_CSUM
;
2912 netdev
->hw_features
|= netdev
->hw_enc_features
;
2913 /* get bit mask from hw about supported offload bit level
2914 * BIT(0) = fw supports patch_level 0
2916 * fcoe_fc_crc_ok = outer csum ok
2917 * BIT(1) = always set by fw
2918 * BIT(2) = fw supports patch_level 2
2919 * BIT(0) in rss_hash = encap
2920 * BIT(1,2) in rss_hash = outer_ip_csum_ok/
2922 * used in enic_rq_indicate_buf
2924 err
= vnic_dev_get_supported_feature_ver(enic
->vdev
,
2929 /* mask bits that are supported by driver
2931 patch_level
&= BIT_ULL(0) | BIT_ULL(2);
2932 patch_level
= fls(patch_level
);
2933 patch_level
= patch_level
? patch_level
- 1 : 0;
2934 enic
->vxlan
.patch_level
= patch_level
;
2937 netdev
->features
|= netdev
->hw_features
;
2938 netdev
->vlan_features
|= netdev
->features
;
2940 #ifdef CONFIG_RFS_ACCEL
2941 netdev
->hw_features
|= NETIF_F_NTUPLE
;
2945 netdev
->features
|= NETIF_F_HIGHDMA
;
2947 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
2949 /* MTU range: 68 - 9000 */
2950 netdev
->min_mtu
= ENIC_MIN_MTU
;
2951 netdev
->max_mtu
= ENIC_MAX_MTU
;
2953 err
= register_netdev(netdev
);
2955 dev_err(dev
, "Cannot register net device, aborting\n");
2956 goto err_out_dev_deinit
;
2958 enic
->rx_copybreak
= RX_COPYBREAK_DEFAULT
;
2963 enic_dev_deinit(enic
);
2965 vnic_dev_close(enic
->vdev
);
2966 err_out_disable_sriov
:
2968 err_out_disable_sriov_pp
:
2969 #ifdef CONFIG_PCI_IOV
2970 if (enic_sriov_enabled(enic
)) {
2971 pci_disable_sriov(pdev
);
2972 enic
->priv_flags
&= ~ENIC_SRIOV_ENABLED
;
2975 err_out_vnic_unregister
:
2976 vnic_dev_unregister(enic
->vdev
);
2979 err_out_release_regions
:
2980 pci_release_regions(pdev
);
2981 err_out_disable_device
:
2982 pci_disable_device(pdev
);
2983 err_out_free_netdev
:
2984 free_netdev(netdev
);
2989 static void enic_remove(struct pci_dev
*pdev
)
2991 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2994 struct enic
*enic
= netdev_priv(netdev
);
2996 cancel_work_sync(&enic
->reset
);
2997 cancel_work_sync(&enic
->change_mtu_work
);
2998 unregister_netdev(netdev
);
2999 enic_dev_deinit(enic
);
3000 vnic_dev_close(enic
->vdev
);
3001 #ifdef CONFIG_PCI_IOV
3002 if (enic_sriov_enabled(enic
)) {
3003 pci_disable_sriov(pdev
);
3004 enic
->priv_flags
&= ~ENIC_SRIOV_ENABLED
;
3008 vnic_dev_unregister(enic
->vdev
);
3010 pci_release_regions(pdev
);
3011 pci_disable_device(pdev
);
3012 free_netdev(netdev
);
3016 static struct pci_driver enic_driver
= {
3018 .id_table
= enic_id_table
,
3019 .probe
= enic_probe
,
3020 .remove
= enic_remove
,
3023 static int __init
enic_init_module(void)
3025 pr_info("%s, ver %s\n", DRV_DESCRIPTION
, DRV_VERSION
);
3027 return pci_register_driver(&enic_driver
);
3030 static void __exit
enic_cleanup_module(void)
3032 pci_unregister_driver(&enic_driver
);
3035 module_init(enic_init_module
);
3036 module_exit(enic_cleanup_module
);