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>
31 #include <linux/if_ether.h>
32 #include <linux/if_vlan.h>
33 #include <linux/ethtool.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>
42 #include "cq_enet_desc.h"
44 #include "vnic_intr.h"
45 #include "vnic_stats.h"
52 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
53 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
54 #define MAX_TSO (1 << 16)
55 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
57 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
58 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
60 /* Supported devices */
61 static DEFINE_PCI_DEVICE_TABLE(enic_id_table
) = {
62 { PCI_VDEVICE(CISCO
, PCI_DEVICE_ID_CISCO_VIC_ENET
) },
63 { PCI_VDEVICE(CISCO
, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN
) },
64 { 0, } /* end of table */
67 MODULE_DESCRIPTION(DRV_DESCRIPTION
);
68 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
69 MODULE_LICENSE("GPL");
70 MODULE_VERSION(DRV_VERSION
);
71 MODULE_DEVICE_TABLE(pci
, enic_id_table
);
74 char name
[ETH_GSTRING_LEN
];
78 #define ENIC_TX_STAT(stat) \
79 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
80 #define ENIC_RX_STAT(stat) \
81 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
83 static const struct enic_stat enic_tx_stats
[] = {
84 ENIC_TX_STAT(tx_frames_ok
),
85 ENIC_TX_STAT(tx_unicast_frames_ok
),
86 ENIC_TX_STAT(tx_multicast_frames_ok
),
87 ENIC_TX_STAT(tx_broadcast_frames_ok
),
88 ENIC_TX_STAT(tx_bytes_ok
),
89 ENIC_TX_STAT(tx_unicast_bytes_ok
),
90 ENIC_TX_STAT(tx_multicast_bytes_ok
),
91 ENIC_TX_STAT(tx_broadcast_bytes_ok
),
92 ENIC_TX_STAT(tx_drops
),
93 ENIC_TX_STAT(tx_errors
),
97 static const struct enic_stat enic_rx_stats
[] = {
98 ENIC_RX_STAT(rx_frames_ok
),
99 ENIC_RX_STAT(rx_frames_total
),
100 ENIC_RX_STAT(rx_unicast_frames_ok
),
101 ENIC_RX_STAT(rx_multicast_frames_ok
),
102 ENIC_RX_STAT(rx_broadcast_frames_ok
),
103 ENIC_RX_STAT(rx_bytes_ok
),
104 ENIC_RX_STAT(rx_unicast_bytes_ok
),
105 ENIC_RX_STAT(rx_multicast_bytes_ok
),
106 ENIC_RX_STAT(rx_broadcast_bytes_ok
),
107 ENIC_RX_STAT(rx_drop
),
108 ENIC_RX_STAT(rx_no_bufs
),
109 ENIC_RX_STAT(rx_errors
),
110 ENIC_RX_STAT(rx_rss
),
111 ENIC_RX_STAT(rx_crc_errors
),
112 ENIC_RX_STAT(rx_frames_64
),
113 ENIC_RX_STAT(rx_frames_127
),
114 ENIC_RX_STAT(rx_frames_255
),
115 ENIC_RX_STAT(rx_frames_511
),
116 ENIC_RX_STAT(rx_frames_1023
),
117 ENIC_RX_STAT(rx_frames_1518
),
118 ENIC_RX_STAT(rx_frames_to_max
),
121 static const unsigned int enic_n_tx_stats
= ARRAY_SIZE(enic_tx_stats
);
122 static const unsigned int enic_n_rx_stats
= ARRAY_SIZE(enic_rx_stats
);
124 static int enic_is_dynamic(struct enic
*enic
)
126 return enic
->pdev
->device
== PCI_DEVICE_ID_CISCO_VIC_ENET_DYN
;
129 static inline unsigned int enic_cq_rq(struct enic
*enic
, unsigned int rq
)
134 static inline unsigned int enic_cq_wq(struct enic
*enic
, unsigned int wq
)
136 return enic
->rq_count
+ wq
;
139 static inline unsigned int enic_legacy_io_intr(void)
144 static inline unsigned int enic_legacy_err_intr(void)
149 static inline unsigned int enic_legacy_notify_intr(void)
154 static inline unsigned int enic_msix_rq_intr(struct enic
*enic
, unsigned int rq
)
156 return enic
->cq
[enic_cq_rq(enic
, rq
)].interrupt_offset
;
159 static inline unsigned int enic_msix_wq_intr(struct enic
*enic
, unsigned int wq
)
161 return enic
->cq
[enic_cq_wq(enic
, wq
)].interrupt_offset
;
164 static inline unsigned int enic_msix_err_intr(struct enic
*enic
)
166 return enic
->rq_count
+ enic
->wq_count
;
169 static inline unsigned int enic_msix_notify_intr(struct enic
*enic
)
171 return enic
->rq_count
+ enic
->wq_count
+ 1;
174 static int enic_get_settings(struct net_device
*netdev
,
175 struct ethtool_cmd
*ecmd
)
177 struct enic
*enic
= netdev_priv(netdev
);
179 ecmd
->supported
= (SUPPORTED_10000baseT_Full
| SUPPORTED_FIBRE
);
180 ecmd
->advertising
= (ADVERTISED_10000baseT_Full
| ADVERTISED_FIBRE
);
181 ecmd
->port
= PORT_FIBRE
;
182 ecmd
->transceiver
= XCVR_EXTERNAL
;
184 if (netif_carrier_ok(netdev
)) {
185 ethtool_cmd_speed_set(ecmd
, vnic_dev_port_speed(enic
->vdev
));
186 ecmd
->duplex
= DUPLEX_FULL
;
188 ethtool_cmd_speed_set(ecmd
, -1);
192 ecmd
->autoneg
= AUTONEG_DISABLE
;
197 static void enic_get_drvinfo(struct net_device
*netdev
,
198 struct ethtool_drvinfo
*drvinfo
)
200 struct enic
*enic
= netdev_priv(netdev
);
201 struct vnic_devcmd_fw_info
*fw_info
;
203 enic_dev_fw_info(enic
, &fw_info
);
205 strncpy(drvinfo
->driver
, DRV_NAME
, sizeof(drvinfo
->driver
));
206 strncpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
207 strncpy(drvinfo
->fw_version
, fw_info
->fw_version
,
208 sizeof(drvinfo
->fw_version
));
209 strncpy(drvinfo
->bus_info
, pci_name(enic
->pdev
),
210 sizeof(drvinfo
->bus_info
));
213 static void enic_get_strings(struct net_device
*netdev
, u32 stringset
, u8
*data
)
219 for (i
= 0; i
< enic_n_tx_stats
; i
++) {
220 memcpy(data
, enic_tx_stats
[i
].name
, ETH_GSTRING_LEN
);
221 data
+= ETH_GSTRING_LEN
;
223 for (i
= 0; i
< enic_n_rx_stats
; i
++) {
224 memcpy(data
, enic_rx_stats
[i
].name
, ETH_GSTRING_LEN
);
225 data
+= ETH_GSTRING_LEN
;
231 static int enic_get_sset_count(struct net_device
*netdev
, int sset
)
235 return enic_n_tx_stats
+ enic_n_rx_stats
;
241 static void enic_get_ethtool_stats(struct net_device
*netdev
,
242 struct ethtool_stats
*stats
, u64
*data
)
244 struct enic
*enic
= netdev_priv(netdev
);
245 struct vnic_stats
*vstats
;
248 enic_dev_stats_dump(enic
, &vstats
);
250 for (i
= 0; i
< enic_n_tx_stats
; i
++)
251 *(data
++) = ((u64
*)&vstats
->tx
)[enic_tx_stats
[i
].offset
];
252 for (i
= 0; i
< enic_n_rx_stats
; i
++)
253 *(data
++) = ((u64
*)&vstats
->rx
)[enic_rx_stats
[i
].offset
];
256 static u32
enic_get_msglevel(struct net_device
*netdev
)
258 struct enic
*enic
= netdev_priv(netdev
);
259 return enic
->msg_enable
;
262 static void enic_set_msglevel(struct net_device
*netdev
, u32 value
)
264 struct enic
*enic
= netdev_priv(netdev
);
265 enic
->msg_enable
= value
;
268 static int enic_get_coalesce(struct net_device
*netdev
,
269 struct ethtool_coalesce
*ecmd
)
271 struct enic
*enic
= netdev_priv(netdev
);
273 ecmd
->tx_coalesce_usecs
= enic
->tx_coalesce_usecs
;
274 ecmd
->rx_coalesce_usecs
= enic
->rx_coalesce_usecs
;
279 static int enic_set_coalesce(struct net_device
*netdev
,
280 struct ethtool_coalesce
*ecmd
)
282 struct enic
*enic
= netdev_priv(netdev
);
283 u32 tx_coalesce_usecs
;
284 u32 rx_coalesce_usecs
;
285 unsigned int i
, intr
;
287 tx_coalesce_usecs
= min_t(u32
, ecmd
->tx_coalesce_usecs
,
288 vnic_dev_get_intr_coal_timer_max(enic
->vdev
));
289 rx_coalesce_usecs
= min_t(u32
, ecmd
->rx_coalesce_usecs
,
290 vnic_dev_get_intr_coal_timer_max(enic
->vdev
));
292 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
293 case VNIC_DEV_INTR_MODE_INTX
:
294 if (tx_coalesce_usecs
!= rx_coalesce_usecs
)
297 intr
= enic_legacy_io_intr();
298 vnic_intr_coalescing_timer_set(&enic
->intr
[intr
],
301 case VNIC_DEV_INTR_MODE_MSI
:
302 if (tx_coalesce_usecs
!= rx_coalesce_usecs
)
305 vnic_intr_coalescing_timer_set(&enic
->intr
[0],
308 case VNIC_DEV_INTR_MODE_MSIX
:
309 for (i
= 0; i
< enic
->wq_count
; i
++) {
310 intr
= enic_msix_wq_intr(enic
, i
);
311 vnic_intr_coalescing_timer_set(&enic
->intr
[intr
],
315 for (i
= 0; i
< enic
->rq_count
; i
++) {
316 intr
= enic_msix_rq_intr(enic
, i
);
317 vnic_intr_coalescing_timer_set(&enic
->intr
[intr
],
326 enic
->tx_coalesce_usecs
= tx_coalesce_usecs
;
327 enic
->rx_coalesce_usecs
= rx_coalesce_usecs
;
332 static const struct ethtool_ops enic_ethtool_ops
= {
333 .get_settings
= enic_get_settings
,
334 .get_drvinfo
= enic_get_drvinfo
,
335 .get_msglevel
= enic_get_msglevel
,
336 .set_msglevel
= enic_set_msglevel
,
337 .get_link
= ethtool_op_get_link
,
338 .get_strings
= enic_get_strings
,
339 .get_sset_count
= enic_get_sset_count
,
340 .get_ethtool_stats
= enic_get_ethtool_stats
,
341 .get_coalesce
= enic_get_coalesce
,
342 .set_coalesce
= enic_set_coalesce
,
345 static void enic_free_wq_buf(struct vnic_wq
*wq
, struct vnic_wq_buf
*buf
)
347 struct enic
*enic
= vnic_dev_priv(wq
->vdev
);
350 pci_unmap_single(enic
->pdev
, buf
->dma_addr
,
351 buf
->len
, PCI_DMA_TODEVICE
);
353 pci_unmap_page(enic
->pdev
, buf
->dma_addr
,
354 buf
->len
, PCI_DMA_TODEVICE
);
357 dev_kfree_skb_any(buf
->os_buf
);
360 static void enic_wq_free_buf(struct vnic_wq
*wq
,
361 struct cq_desc
*cq_desc
, struct vnic_wq_buf
*buf
, void *opaque
)
363 enic_free_wq_buf(wq
, buf
);
366 static int enic_wq_service(struct vnic_dev
*vdev
, struct cq_desc
*cq_desc
,
367 u8 type
, u16 q_number
, u16 completed_index
, void *opaque
)
369 struct enic
*enic
= vnic_dev_priv(vdev
);
371 spin_lock(&enic
->wq_lock
[q_number
]);
373 vnic_wq_service(&enic
->wq
[q_number
], cq_desc
,
374 completed_index
, enic_wq_free_buf
,
377 if (netif_queue_stopped(enic
->netdev
) &&
378 vnic_wq_desc_avail(&enic
->wq
[q_number
]) >=
379 (MAX_SKB_FRAGS
+ ENIC_DESC_MAX_SPLITS
))
380 netif_wake_queue(enic
->netdev
);
382 spin_unlock(&enic
->wq_lock
[q_number
]);
387 static void enic_log_q_error(struct enic
*enic
)
392 for (i
= 0; i
< enic
->wq_count
; i
++) {
393 error_status
= vnic_wq_error_status(&enic
->wq
[i
]);
395 netdev_err(enic
->netdev
, "WQ[%d] error_status %d\n",
399 for (i
= 0; i
< enic
->rq_count
; i
++) {
400 error_status
= vnic_rq_error_status(&enic
->rq
[i
]);
402 netdev_err(enic
->netdev
, "RQ[%d] error_status %d\n",
407 static void enic_msglvl_check(struct enic
*enic
)
409 u32 msg_enable
= vnic_dev_msg_lvl(enic
->vdev
);
411 if (msg_enable
!= enic
->msg_enable
) {
412 netdev_info(enic
->netdev
, "msg lvl changed from 0x%x to 0x%x\n",
413 enic
->msg_enable
, msg_enable
);
414 enic
->msg_enable
= msg_enable
;
418 static void enic_mtu_check(struct enic
*enic
)
420 u32 mtu
= vnic_dev_mtu(enic
->vdev
);
421 struct net_device
*netdev
= enic
->netdev
;
423 if (mtu
&& mtu
!= enic
->port_mtu
) {
424 enic
->port_mtu
= mtu
;
425 if (enic_is_dynamic(enic
)) {
426 mtu
= max_t(int, ENIC_MIN_MTU
,
427 min_t(int, ENIC_MAX_MTU
, mtu
));
428 if (mtu
!= netdev
->mtu
)
429 schedule_work(&enic
->change_mtu_work
);
431 if (mtu
< netdev
->mtu
)
433 "interface MTU (%d) set higher "
434 "than switch port MTU (%d)\n",
440 static void enic_link_check(struct enic
*enic
)
442 int link_status
= vnic_dev_link_status(enic
->vdev
);
443 int carrier_ok
= netif_carrier_ok(enic
->netdev
);
445 if (link_status
&& !carrier_ok
) {
446 netdev_info(enic
->netdev
, "Link UP\n");
447 netif_carrier_on(enic
->netdev
);
448 } else if (!link_status
&& carrier_ok
) {
449 netdev_info(enic
->netdev
, "Link DOWN\n");
450 netif_carrier_off(enic
->netdev
);
454 static void enic_notify_check(struct enic
*enic
)
456 enic_msglvl_check(enic
);
457 enic_mtu_check(enic
);
458 enic_link_check(enic
);
461 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
463 static irqreturn_t
enic_isr_legacy(int irq
, void *data
)
465 struct net_device
*netdev
= data
;
466 struct enic
*enic
= netdev_priv(netdev
);
467 unsigned int io_intr
= enic_legacy_io_intr();
468 unsigned int err_intr
= enic_legacy_err_intr();
469 unsigned int notify_intr
= enic_legacy_notify_intr();
472 vnic_intr_mask(&enic
->intr
[io_intr
]);
474 pba
= vnic_intr_legacy_pba(enic
->legacy_pba
);
476 vnic_intr_unmask(&enic
->intr
[io_intr
]);
477 return IRQ_NONE
; /* not our interrupt */
480 if (ENIC_TEST_INTR(pba
, notify_intr
)) {
481 vnic_intr_return_all_credits(&enic
->intr
[notify_intr
]);
482 enic_notify_check(enic
);
485 if (ENIC_TEST_INTR(pba
, err_intr
)) {
486 vnic_intr_return_all_credits(&enic
->intr
[err_intr
]);
487 enic_log_q_error(enic
);
488 /* schedule recovery from WQ/RQ error */
489 schedule_work(&enic
->reset
);
493 if (ENIC_TEST_INTR(pba
, io_intr
)) {
494 if (napi_schedule_prep(&enic
->napi
[0]))
495 __napi_schedule(&enic
->napi
[0]);
497 vnic_intr_unmask(&enic
->intr
[io_intr
]);
503 static irqreturn_t
enic_isr_msi(int irq
, void *data
)
505 struct enic
*enic
= data
;
507 /* With MSI, there is no sharing of interrupts, so this is
508 * our interrupt and there is no need to ack it. The device
509 * is not providing per-vector masking, so the OS will not
510 * write to PCI config space to mask/unmask the interrupt.
511 * We're using mask_on_assertion for MSI, so the device
512 * automatically masks the interrupt when the interrupt is
513 * generated. Later, when exiting polling, the interrupt
514 * will be unmasked (see enic_poll).
516 * Also, the device uses the same PCIe Traffic Class (TC)
517 * for Memory Write data and MSI, so there are no ordering
518 * issues; the MSI will always arrive at the Root Complex
519 * _after_ corresponding Memory Writes (i.e. descriptor
523 napi_schedule(&enic
->napi
[0]);
528 static irqreturn_t
enic_isr_msix_rq(int irq
, void *data
)
530 struct napi_struct
*napi
= data
;
532 /* schedule NAPI polling for RQ cleanup */
538 static irqreturn_t
enic_isr_msix_wq(int irq
, void *data
)
540 struct enic
*enic
= data
;
541 unsigned int cq
= enic_cq_wq(enic
, 0);
542 unsigned int intr
= enic_msix_wq_intr(enic
, 0);
543 unsigned int wq_work_to_do
= -1; /* no limit */
544 unsigned int wq_work_done
;
546 wq_work_done
= vnic_cq_service(&enic
->cq
[cq
],
547 wq_work_to_do
, enic_wq_service
, NULL
);
549 vnic_intr_return_credits(&enic
->intr
[intr
],
552 1 /* reset intr timer */);
557 static irqreturn_t
enic_isr_msix_err(int irq
, void *data
)
559 struct enic
*enic
= data
;
560 unsigned int intr
= enic_msix_err_intr(enic
);
562 vnic_intr_return_all_credits(&enic
->intr
[intr
]);
564 enic_log_q_error(enic
);
566 /* schedule recovery from WQ/RQ error */
567 schedule_work(&enic
->reset
);
572 static irqreturn_t
enic_isr_msix_notify(int irq
, void *data
)
574 struct enic
*enic
= data
;
575 unsigned int intr
= enic_msix_notify_intr(enic
);
577 vnic_intr_return_all_credits(&enic
->intr
[intr
]);
578 enic_notify_check(enic
);
583 static inline void enic_queue_wq_skb_cont(struct enic
*enic
,
584 struct vnic_wq
*wq
, struct sk_buff
*skb
,
585 unsigned int len_left
, int loopback
)
589 /* Queue additional data fragments */
590 for (frag
= skb_shinfo(skb
)->frags
; len_left
; frag
++) {
591 len_left
-= frag
->size
;
592 enic_queue_wq_desc_cont(wq
, skb
,
593 pci_map_page(enic
->pdev
, frag
->page
,
594 frag
->page_offset
, frag
->size
,
597 (len_left
== 0), /* EOP? */
602 static inline void enic_queue_wq_skb_vlan(struct enic
*enic
,
603 struct vnic_wq
*wq
, struct sk_buff
*skb
,
604 int vlan_tag_insert
, unsigned int vlan_tag
, int loopback
)
606 unsigned int head_len
= skb_headlen(skb
);
607 unsigned int len_left
= skb
->len
- head_len
;
608 int eop
= (len_left
== 0);
610 /* Queue the main skb fragment. The fragments are no larger
611 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
612 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
613 * per fragment is queued.
615 enic_queue_wq_desc(wq
, skb
,
616 pci_map_single(enic
->pdev
, skb
->data
,
617 head_len
, PCI_DMA_TODEVICE
),
619 vlan_tag_insert
, vlan_tag
,
623 enic_queue_wq_skb_cont(enic
, wq
, skb
, len_left
, loopback
);
626 static inline void enic_queue_wq_skb_csum_l4(struct enic
*enic
,
627 struct vnic_wq
*wq
, struct sk_buff
*skb
,
628 int vlan_tag_insert
, unsigned int vlan_tag
, int loopback
)
630 unsigned int head_len
= skb_headlen(skb
);
631 unsigned int len_left
= skb
->len
- head_len
;
632 unsigned int hdr_len
= skb_checksum_start_offset(skb
);
633 unsigned int csum_offset
= hdr_len
+ skb
->csum_offset
;
634 int eop
= (len_left
== 0);
636 /* Queue the main skb fragment. The fragments are no larger
637 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
638 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
639 * per fragment is queued.
641 enic_queue_wq_desc_csum_l4(wq
, skb
,
642 pci_map_single(enic
->pdev
, skb
->data
,
643 head_len
, PCI_DMA_TODEVICE
),
647 vlan_tag_insert
, vlan_tag
,
651 enic_queue_wq_skb_cont(enic
, wq
, skb
, len_left
, loopback
);
654 static inline void enic_queue_wq_skb_tso(struct enic
*enic
,
655 struct vnic_wq
*wq
, struct sk_buff
*skb
, unsigned int mss
,
656 int vlan_tag_insert
, unsigned int vlan_tag
, int loopback
)
658 unsigned int frag_len_left
= skb_headlen(skb
);
659 unsigned int len_left
= skb
->len
- frag_len_left
;
660 unsigned int hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
661 int eop
= (len_left
== 0);
664 unsigned int offset
= 0;
667 /* Preload TCP csum field with IP pseudo hdr calculated
668 * with IP length set to zero. HW will later add in length
669 * to each TCP segment resulting from the TSO.
672 if (skb
->protocol
== cpu_to_be16(ETH_P_IP
)) {
673 ip_hdr(skb
)->check
= 0;
674 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(ip_hdr(skb
)->saddr
,
675 ip_hdr(skb
)->daddr
, 0, IPPROTO_TCP
, 0);
676 } else if (skb
->protocol
== cpu_to_be16(ETH_P_IPV6
)) {
677 tcp_hdr(skb
)->check
= ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
678 &ipv6_hdr(skb
)->daddr
, 0, IPPROTO_TCP
, 0);
681 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
682 * for the main skb fragment
684 while (frag_len_left
) {
685 len
= min(frag_len_left
, (unsigned int)WQ_ENET_MAX_DESC_LEN
);
686 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
+ offset
,
687 len
, PCI_DMA_TODEVICE
);
688 enic_queue_wq_desc_tso(wq
, skb
,
692 vlan_tag_insert
, vlan_tag
,
693 eop
&& (len
== frag_len_left
), loopback
);
694 frag_len_left
-= len
;
701 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
702 * for additional data fragments
704 for (frag
= skb_shinfo(skb
)->frags
; len_left
; frag
++) {
705 len_left
-= frag
->size
;
706 frag_len_left
= frag
->size
;
707 offset
= frag
->page_offset
;
709 while (frag_len_left
) {
710 len
= min(frag_len_left
,
711 (unsigned int)WQ_ENET_MAX_DESC_LEN
);
712 dma_addr
= pci_map_page(enic
->pdev
, frag
->page
,
715 enic_queue_wq_desc_cont(wq
, skb
,
719 (len
== frag_len_left
), /* EOP? */
721 frag_len_left
-= len
;
727 static inline void enic_queue_wq_skb(struct enic
*enic
,
728 struct vnic_wq
*wq
, struct sk_buff
*skb
)
730 unsigned int mss
= skb_shinfo(skb
)->gso_size
;
731 unsigned int vlan_tag
= 0;
732 int vlan_tag_insert
= 0;
735 if (vlan_tx_tag_present(skb
)) {
736 /* VLAN tag from trunking driver */
738 vlan_tag
= vlan_tx_tag_get(skb
);
739 } else if (enic
->loop_enable
) {
740 vlan_tag
= enic
->loop_tag
;
745 enic_queue_wq_skb_tso(enic
, wq
, skb
, mss
,
746 vlan_tag_insert
, vlan_tag
, loopback
);
747 else if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
748 enic_queue_wq_skb_csum_l4(enic
, wq
, skb
,
749 vlan_tag_insert
, vlan_tag
, loopback
);
751 enic_queue_wq_skb_vlan(enic
, wq
, skb
,
752 vlan_tag_insert
, vlan_tag
, loopback
);
755 /* netif_tx_lock held, process context with BHs disabled, or BH */
756 static netdev_tx_t
enic_hard_start_xmit(struct sk_buff
*skb
,
757 struct net_device
*netdev
)
759 struct enic
*enic
= netdev_priv(netdev
);
760 struct vnic_wq
*wq
= &enic
->wq
[0];
768 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
769 * which is very likely. In the off chance it's going to take
770 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
773 if (skb_shinfo(skb
)->gso_size
== 0 &&
774 skb_shinfo(skb
)->nr_frags
+ 1 > ENIC_NON_TSO_MAX_DESC
&&
775 skb_linearize(skb
)) {
780 spin_lock_irqsave(&enic
->wq_lock
[0], flags
);
782 if (vnic_wq_desc_avail(wq
) <
783 skb_shinfo(skb
)->nr_frags
+ ENIC_DESC_MAX_SPLITS
) {
784 netif_stop_queue(netdev
);
785 /* This is a hard error, log it */
786 netdev_err(netdev
, "BUG! Tx ring full when queue awake!\n");
787 spin_unlock_irqrestore(&enic
->wq_lock
[0], flags
);
788 return NETDEV_TX_BUSY
;
791 enic_queue_wq_skb(enic
, wq
, skb
);
793 if (vnic_wq_desc_avail(wq
) < MAX_SKB_FRAGS
+ ENIC_DESC_MAX_SPLITS
)
794 netif_stop_queue(netdev
);
796 spin_unlock_irqrestore(&enic
->wq_lock
[0], flags
);
801 /* dev_base_lock rwlock held, nominally process context */
802 static struct rtnl_link_stats64
*enic_get_stats(struct net_device
*netdev
,
803 struct rtnl_link_stats64
*net_stats
)
805 struct enic
*enic
= netdev_priv(netdev
);
806 struct vnic_stats
*stats
;
808 enic_dev_stats_dump(enic
, &stats
);
810 net_stats
->tx_packets
= stats
->tx
.tx_frames_ok
;
811 net_stats
->tx_bytes
= stats
->tx
.tx_bytes_ok
;
812 net_stats
->tx_errors
= stats
->tx
.tx_errors
;
813 net_stats
->tx_dropped
= stats
->tx
.tx_drops
;
815 net_stats
->rx_packets
= stats
->rx
.rx_frames_ok
;
816 net_stats
->rx_bytes
= stats
->rx
.rx_bytes_ok
;
817 net_stats
->rx_errors
= stats
->rx
.rx_errors
;
818 net_stats
->multicast
= stats
->rx
.rx_multicast_frames_ok
;
819 net_stats
->rx_over_errors
= enic
->rq_truncated_pkts
;
820 net_stats
->rx_crc_errors
= enic
->rq_bad_fcs
;
821 net_stats
->rx_dropped
= stats
->rx
.rx_no_bufs
+ stats
->rx
.rx_drop
;
826 void enic_reset_addr_lists(struct enic
*enic
)
833 static int enic_set_mac_addr(struct net_device
*netdev
, char *addr
)
835 struct enic
*enic
= netdev_priv(netdev
);
837 if (enic_is_dynamic(enic
)) {
838 if (!is_valid_ether_addr(addr
) && !is_zero_ether_addr(addr
))
839 return -EADDRNOTAVAIL
;
841 if (!is_valid_ether_addr(addr
))
842 return -EADDRNOTAVAIL
;
845 memcpy(netdev
->dev_addr
, addr
, netdev
->addr_len
);
850 static int enic_set_mac_address_dynamic(struct net_device
*netdev
, void *p
)
852 struct enic
*enic
= netdev_priv(netdev
);
853 struct sockaddr
*saddr
= p
;
854 char *addr
= saddr
->sa_data
;
857 if (netif_running(enic
->netdev
)) {
858 err
= enic_dev_del_station_addr(enic
);
863 err
= enic_set_mac_addr(netdev
, addr
);
867 if (netif_running(enic
->netdev
)) {
868 err
= enic_dev_add_station_addr(enic
);
876 static int enic_set_mac_address(struct net_device
*netdev
, void *p
)
878 struct sockaddr
*saddr
= p
;
879 char *addr
= saddr
->sa_data
;
880 struct enic
*enic
= netdev_priv(netdev
);
883 err
= enic_dev_del_station_addr(enic
);
887 err
= enic_set_mac_addr(netdev
, addr
);
891 return enic_dev_add_station_addr(enic
);
894 static void enic_update_multicast_addr_list(struct enic
*enic
)
896 struct net_device
*netdev
= enic
->netdev
;
897 struct netdev_hw_addr
*ha
;
898 unsigned int mc_count
= netdev_mc_count(netdev
);
899 u8 mc_addr
[ENIC_MULTICAST_PERFECT_FILTERS
][ETH_ALEN
];
902 if (mc_count
> ENIC_MULTICAST_PERFECT_FILTERS
) {
903 netdev_warn(netdev
, "Registering only %d out of %d "
904 "multicast addresses\n",
905 ENIC_MULTICAST_PERFECT_FILTERS
, mc_count
);
906 mc_count
= ENIC_MULTICAST_PERFECT_FILTERS
;
909 /* Is there an easier way? Trying to minimize to
910 * calls to add/del multicast addrs. We keep the
911 * addrs from the last call in enic->mc_addr and
912 * look for changes to add/del.
916 netdev_for_each_mc_addr(ha
, netdev
) {
919 memcpy(mc_addr
[i
++], ha
->addr
, ETH_ALEN
);
922 for (i
= 0; i
< enic
->mc_count
; i
++) {
923 for (j
= 0; j
< mc_count
; j
++)
924 if (compare_ether_addr(enic
->mc_addr
[i
],
928 enic_dev_del_addr(enic
, enic
->mc_addr
[i
]);
931 for (i
= 0; i
< mc_count
; i
++) {
932 for (j
= 0; j
< enic
->mc_count
; j
++)
933 if (compare_ether_addr(mc_addr
[i
],
934 enic
->mc_addr
[j
]) == 0)
936 if (j
== enic
->mc_count
)
937 enic_dev_add_addr(enic
, mc_addr
[i
]);
940 /* Save the list to compare against next time
943 for (i
= 0; i
< mc_count
; i
++)
944 memcpy(enic
->mc_addr
[i
], mc_addr
[i
], ETH_ALEN
);
946 enic
->mc_count
= mc_count
;
949 static void enic_update_unicast_addr_list(struct enic
*enic
)
951 struct net_device
*netdev
= enic
->netdev
;
952 struct netdev_hw_addr
*ha
;
953 unsigned int uc_count
= netdev_uc_count(netdev
);
954 u8 uc_addr
[ENIC_UNICAST_PERFECT_FILTERS
][ETH_ALEN
];
957 if (uc_count
> ENIC_UNICAST_PERFECT_FILTERS
) {
958 netdev_warn(netdev
, "Registering only %d out of %d "
959 "unicast addresses\n",
960 ENIC_UNICAST_PERFECT_FILTERS
, uc_count
);
961 uc_count
= ENIC_UNICAST_PERFECT_FILTERS
;
964 /* Is there an easier way? Trying to minimize to
965 * calls to add/del unicast addrs. We keep the
966 * addrs from the last call in enic->uc_addr and
967 * look for changes to add/del.
971 netdev_for_each_uc_addr(ha
, netdev
) {
974 memcpy(uc_addr
[i
++], ha
->addr
, ETH_ALEN
);
977 for (i
= 0; i
< enic
->uc_count
; i
++) {
978 for (j
= 0; j
< uc_count
; j
++)
979 if (compare_ether_addr(enic
->uc_addr
[i
],
983 enic_dev_del_addr(enic
, enic
->uc_addr
[i
]);
986 for (i
= 0; i
< uc_count
; i
++) {
987 for (j
= 0; j
< enic
->uc_count
; j
++)
988 if (compare_ether_addr(uc_addr
[i
],
989 enic
->uc_addr
[j
]) == 0)
991 if (j
== enic
->uc_count
)
992 enic_dev_add_addr(enic
, uc_addr
[i
]);
995 /* Save the list to compare against next time
998 for (i
= 0; i
< uc_count
; i
++)
999 memcpy(enic
->uc_addr
[i
], uc_addr
[i
], ETH_ALEN
);
1001 enic
->uc_count
= uc_count
;
1004 /* netif_tx_lock held, BHs disabled */
1005 static void enic_set_rx_mode(struct net_device
*netdev
)
1007 struct enic
*enic
= netdev_priv(netdev
);
1009 int multicast
= (netdev
->flags
& IFF_MULTICAST
) ? 1 : 0;
1010 int broadcast
= (netdev
->flags
& IFF_BROADCAST
) ? 1 : 0;
1011 int promisc
= (netdev
->flags
& IFF_PROMISC
) ||
1012 netdev_uc_count(netdev
) > ENIC_UNICAST_PERFECT_FILTERS
;
1013 int allmulti
= (netdev
->flags
& IFF_ALLMULTI
) ||
1014 netdev_mc_count(netdev
) > ENIC_MULTICAST_PERFECT_FILTERS
;
1015 unsigned int flags
= netdev
->flags
|
1016 (allmulti
? IFF_ALLMULTI
: 0) |
1017 (promisc
? IFF_PROMISC
: 0);
1019 if (enic
->flags
!= flags
) {
1020 enic
->flags
= flags
;
1021 enic_dev_packet_filter(enic
, directed
,
1022 multicast
, broadcast
, promisc
, allmulti
);
1026 enic_update_unicast_addr_list(enic
);
1028 enic_update_multicast_addr_list(enic
);
1032 /* netif_tx_lock held, BHs disabled */
1033 static void enic_tx_timeout(struct net_device
*netdev
)
1035 struct enic
*enic
= netdev_priv(netdev
);
1036 schedule_work(&enic
->reset
);
1039 static int enic_set_vf_mac(struct net_device
*netdev
, int vf
, u8
*mac
)
1041 struct enic
*enic
= netdev_priv(netdev
);
1043 if (vf
!= PORT_SELF_VF
)
1046 /* Ignore the vf argument for now. We can assume the request
1047 * is coming on a vf.
1049 if (is_valid_ether_addr(mac
)) {
1050 memcpy(enic
->pp
.vf_mac
, mac
, ETH_ALEN
);
1056 static int enic_set_vf_port(struct net_device
*netdev
, int vf
,
1057 struct nlattr
*port
[])
1059 struct enic
*enic
= netdev_priv(netdev
);
1060 struct enic_port_profile prev_pp
;
1061 int err
= 0, restore_pp
= 1;
1063 /* don't support VFs, yet */
1064 if (vf
!= PORT_SELF_VF
)
1067 if (!port
[IFLA_PORT_REQUEST
])
1070 memcpy(&prev_pp
, &enic
->pp
, sizeof(enic
->pp
));
1071 memset(&enic
->pp
, 0, sizeof(enic
->pp
));
1073 enic
->pp
.set
|= ENIC_SET_REQUEST
;
1074 enic
->pp
.request
= nla_get_u8(port
[IFLA_PORT_REQUEST
]);
1076 if (port
[IFLA_PORT_PROFILE
]) {
1077 enic
->pp
.set
|= ENIC_SET_NAME
;
1078 memcpy(enic
->pp
.name
, nla_data(port
[IFLA_PORT_PROFILE
]),
1082 if (port
[IFLA_PORT_INSTANCE_UUID
]) {
1083 enic
->pp
.set
|= ENIC_SET_INSTANCE
;
1084 memcpy(enic
->pp
.instance_uuid
,
1085 nla_data(port
[IFLA_PORT_INSTANCE_UUID
]), PORT_UUID_MAX
);
1088 if (port
[IFLA_PORT_HOST_UUID
]) {
1089 enic
->pp
.set
|= ENIC_SET_HOST
;
1090 memcpy(enic
->pp
.host_uuid
,
1091 nla_data(port
[IFLA_PORT_HOST_UUID
]), PORT_UUID_MAX
);
1094 /* Special case handling: mac came from IFLA_VF_MAC */
1095 if (!is_zero_ether_addr(prev_pp
.vf_mac
))
1096 memcpy(enic
->pp
.mac_addr
, prev_pp
.vf_mac
, ETH_ALEN
);
1098 if (is_zero_ether_addr(netdev
->dev_addr
))
1099 random_ether_addr(netdev
->dev_addr
);
1101 err
= enic_process_set_pp_request(enic
, &prev_pp
, &restore_pp
);
1104 /* Things are still the way they were: Implicit
1105 * DISASSOCIATE failed
1107 memcpy(&enic
->pp
, &prev_pp
, sizeof(enic
->pp
));
1109 memset(&enic
->pp
, 0, sizeof(enic
->pp
));
1110 memset(netdev
->dev_addr
, 0, ETH_ALEN
);
1113 /* Set flag to indicate that the port assoc/disassoc
1114 * request has been sent out to fw
1116 enic
->pp
.set
|= ENIC_PORT_REQUEST_APPLIED
;
1118 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1119 if (enic
->pp
.request
== PORT_REQUEST_DISASSOCIATE
) {
1120 memset(enic
->pp
.mac_addr
, 0, ETH_ALEN
);
1121 memset(netdev
->dev_addr
, 0, ETH_ALEN
);
1125 memset(enic
->pp
.vf_mac
, 0, ETH_ALEN
);
1130 static int enic_get_vf_port(struct net_device
*netdev
, int vf
,
1131 struct sk_buff
*skb
)
1133 struct enic
*enic
= netdev_priv(netdev
);
1134 u16 response
= PORT_PROFILE_RESPONSE_SUCCESS
;
1137 if (!(enic
->pp
.set
& ENIC_PORT_REQUEST_APPLIED
))
1140 err
= enic_process_get_pp_request(enic
, enic
->pp
.request
, &response
);
1144 NLA_PUT_U16(skb
, IFLA_PORT_REQUEST
, enic
->pp
.request
);
1145 NLA_PUT_U16(skb
, IFLA_PORT_RESPONSE
, response
);
1146 if (enic
->pp
.set
& ENIC_SET_NAME
)
1147 NLA_PUT(skb
, IFLA_PORT_PROFILE
, PORT_PROFILE_MAX
,
1149 if (enic
->pp
.set
& ENIC_SET_INSTANCE
)
1150 NLA_PUT(skb
, IFLA_PORT_INSTANCE_UUID
, PORT_UUID_MAX
,
1151 enic
->pp
.instance_uuid
);
1152 if (enic
->pp
.set
& ENIC_SET_HOST
)
1153 NLA_PUT(skb
, IFLA_PORT_HOST_UUID
, PORT_UUID_MAX
,
1154 enic
->pp
.host_uuid
);
1162 static void enic_free_rq_buf(struct vnic_rq
*rq
, struct vnic_rq_buf
*buf
)
1164 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
1169 pci_unmap_single(enic
->pdev
, buf
->dma_addr
,
1170 buf
->len
, PCI_DMA_FROMDEVICE
);
1171 dev_kfree_skb_any(buf
->os_buf
);
1174 static int enic_rq_alloc_buf(struct vnic_rq
*rq
)
1176 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
1177 struct net_device
*netdev
= enic
->netdev
;
1178 struct sk_buff
*skb
;
1179 unsigned int len
= netdev
->mtu
+ VLAN_ETH_HLEN
;
1180 unsigned int os_buf_index
= 0;
1181 dma_addr_t dma_addr
;
1183 skb
= netdev_alloc_skb_ip_align(netdev
, len
);
1187 dma_addr
= pci_map_single(enic
->pdev
, skb
->data
,
1188 len
, PCI_DMA_FROMDEVICE
);
1190 enic_queue_rq_desc(rq
, skb
, os_buf_index
,
1196 static void enic_rq_indicate_buf(struct vnic_rq
*rq
,
1197 struct cq_desc
*cq_desc
, struct vnic_rq_buf
*buf
,
1198 int skipped
, void *opaque
)
1200 struct enic
*enic
= vnic_dev_priv(rq
->vdev
);
1201 struct net_device
*netdev
= enic
->netdev
;
1202 struct sk_buff
*skb
;
1204 u8 type
, color
, eop
, sop
, ingress_port
, vlan_stripped
;
1205 u8 fcoe
, fcoe_sof
, fcoe_fc_crc_ok
, fcoe_enc_error
, fcoe_eof
;
1206 u8 tcp_udp_csum_ok
, udp
, tcp
, ipv4_csum_ok
;
1207 u8 ipv6
, ipv4
, ipv4_fragment
, fcs_ok
, rss_type
, csum_not_calc
;
1209 u16 q_number
, completed_index
, bytes_written
, vlan_tci
, checksum
;
1216 prefetch(skb
->data
- NET_IP_ALIGN
);
1217 pci_unmap_single(enic
->pdev
, buf
->dma_addr
,
1218 buf
->len
, PCI_DMA_FROMDEVICE
);
1220 cq_enet_rq_desc_dec((struct cq_enet_rq_desc
*)cq_desc
,
1221 &type
, &color
, &q_number
, &completed_index
,
1222 &ingress_port
, &fcoe
, &eop
, &sop
, &rss_type
,
1223 &csum_not_calc
, &rss_hash
, &bytes_written
,
1224 &packet_error
, &vlan_stripped
, &vlan_tci
, &checksum
,
1225 &fcoe_sof
, &fcoe_fc_crc_ok
, &fcoe_enc_error
,
1226 &fcoe_eof
, &tcp_udp_csum_ok
, &udp
, &tcp
,
1227 &ipv4_csum_ok
, &ipv6
, &ipv4
, &ipv4_fragment
,
1233 if (bytes_written
> 0)
1235 else if (bytes_written
== 0)
1236 enic
->rq_truncated_pkts
++;
1239 dev_kfree_skb_any(skb
);
1244 if (eop
&& bytes_written
> 0) {
1249 skb_put(skb
, bytes_written
);
1250 skb
->protocol
= eth_type_trans(skb
, netdev
);
1252 if ((netdev
->features
& NETIF_F_RXCSUM
) && !csum_not_calc
) {
1253 skb
->csum
= htons(checksum
);
1254 skb
->ip_summed
= CHECKSUM_COMPLETE
;
1260 __vlan_hwaccel_put_tag(skb
, vlan_tci
);
1262 if (netdev
->features
& NETIF_F_GRO
)
1263 napi_gro_receive(&enic
->napi
[q_number
], skb
);
1265 netif_receive_skb(skb
);
1271 dev_kfree_skb_any(skb
);
1275 static int enic_rq_service(struct vnic_dev
*vdev
, struct cq_desc
*cq_desc
,
1276 u8 type
, u16 q_number
, u16 completed_index
, void *opaque
)
1278 struct enic
*enic
= vnic_dev_priv(vdev
);
1280 vnic_rq_service(&enic
->rq
[q_number
], cq_desc
,
1281 completed_index
, VNIC_RQ_RETURN_DESC
,
1282 enic_rq_indicate_buf
, opaque
);
1287 static int enic_poll(struct napi_struct
*napi
, int budget
)
1289 struct net_device
*netdev
= napi
->dev
;
1290 struct enic
*enic
= netdev_priv(netdev
);
1291 unsigned int cq_rq
= enic_cq_rq(enic
, 0);
1292 unsigned int cq_wq
= enic_cq_wq(enic
, 0);
1293 unsigned int intr
= enic_legacy_io_intr();
1294 unsigned int rq_work_to_do
= budget
;
1295 unsigned int wq_work_to_do
= -1; /* no limit */
1296 unsigned int work_done
, rq_work_done
, wq_work_done
;
1299 /* Service RQ (first) and WQ
1302 rq_work_done
= vnic_cq_service(&enic
->cq
[cq_rq
],
1303 rq_work_to_do
, enic_rq_service
, NULL
);
1305 wq_work_done
= vnic_cq_service(&enic
->cq
[cq_wq
],
1306 wq_work_to_do
, enic_wq_service
, NULL
);
1308 /* Accumulate intr event credits for this polling
1309 * cycle. An intr event is the completion of a
1310 * a WQ or RQ packet.
1313 work_done
= rq_work_done
+ wq_work_done
;
1316 vnic_intr_return_credits(&enic
->intr
[intr
],
1318 0 /* don't unmask intr */,
1319 0 /* don't reset intr timer */);
1321 err
= vnic_rq_fill(&enic
->rq
[0], enic_rq_alloc_buf
);
1323 /* Buffer allocation failed. Stay in polling
1324 * mode so we can try to fill the ring again.
1328 rq_work_done
= rq_work_to_do
;
1330 if (rq_work_done
< rq_work_to_do
) {
1332 /* Some work done, but not enough to stay in polling,
1336 napi_complete(napi
);
1337 vnic_intr_unmask(&enic
->intr
[intr
]);
1340 return rq_work_done
;
1343 static int enic_poll_msix(struct napi_struct
*napi
, int budget
)
1345 struct net_device
*netdev
= napi
->dev
;
1346 struct enic
*enic
= netdev_priv(netdev
);
1347 unsigned int rq
= (napi
- &enic
->napi
[0]);
1348 unsigned int cq
= enic_cq_rq(enic
, rq
);
1349 unsigned int intr
= enic_msix_rq_intr(enic
, rq
);
1350 unsigned int work_to_do
= budget
;
1351 unsigned int work_done
;
1357 work_done
= vnic_cq_service(&enic
->cq
[cq
],
1358 work_to_do
, enic_rq_service
, NULL
);
1360 /* Return intr event credits for this polling
1361 * cycle. An intr event is the completion of a
1366 vnic_intr_return_credits(&enic
->intr
[intr
],
1368 0 /* don't unmask intr */,
1369 0 /* don't reset intr timer */);
1371 err
= vnic_rq_fill(&enic
->rq
[rq
], enic_rq_alloc_buf
);
1373 /* Buffer allocation failed. Stay in polling mode
1374 * so we can try to fill the ring again.
1378 work_done
= work_to_do
;
1380 if (work_done
< work_to_do
) {
1382 /* Some work done, but not enough to stay in polling,
1386 napi_complete(napi
);
1387 vnic_intr_unmask(&enic
->intr
[intr
]);
1393 static void enic_notify_timer(unsigned long data
)
1395 struct enic
*enic
= (struct enic
*)data
;
1397 enic_notify_check(enic
);
1399 mod_timer(&enic
->notify_timer
,
1400 round_jiffies(jiffies
+ ENIC_NOTIFY_TIMER_PERIOD
));
1403 static void enic_free_intr(struct enic
*enic
)
1405 struct net_device
*netdev
= enic
->netdev
;
1408 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1409 case VNIC_DEV_INTR_MODE_INTX
:
1410 free_irq(enic
->pdev
->irq
, netdev
);
1412 case VNIC_DEV_INTR_MODE_MSI
:
1413 free_irq(enic
->pdev
->irq
, enic
);
1415 case VNIC_DEV_INTR_MODE_MSIX
:
1416 for (i
= 0; i
< ARRAY_SIZE(enic
->msix
); i
++)
1417 if (enic
->msix
[i
].requested
)
1418 free_irq(enic
->msix_entry
[i
].vector
,
1419 enic
->msix
[i
].devid
);
1426 static int enic_request_intr(struct enic
*enic
)
1428 struct net_device
*netdev
= enic
->netdev
;
1429 unsigned int i
, intr
;
1432 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1434 case VNIC_DEV_INTR_MODE_INTX
:
1436 err
= request_irq(enic
->pdev
->irq
, enic_isr_legacy
,
1437 IRQF_SHARED
, netdev
->name
, netdev
);
1440 case VNIC_DEV_INTR_MODE_MSI
:
1442 err
= request_irq(enic
->pdev
->irq
, enic_isr_msi
,
1443 0, netdev
->name
, enic
);
1446 case VNIC_DEV_INTR_MODE_MSIX
:
1448 for (i
= 0; i
< enic
->rq_count
; i
++) {
1449 intr
= enic_msix_rq_intr(enic
, i
);
1450 sprintf(enic
->msix
[intr
].devname
,
1451 "%.11s-rx-%d", netdev
->name
, i
);
1452 enic
->msix
[intr
].isr
= enic_isr_msix_rq
;
1453 enic
->msix
[intr
].devid
= &enic
->napi
[i
];
1456 for (i
= 0; i
< enic
->wq_count
; i
++) {
1457 intr
= enic_msix_wq_intr(enic
, i
);
1458 sprintf(enic
->msix
[intr
].devname
,
1459 "%.11s-tx-%d", netdev
->name
, i
);
1460 enic
->msix
[intr
].isr
= enic_isr_msix_wq
;
1461 enic
->msix
[intr
].devid
= enic
;
1464 intr
= enic_msix_err_intr(enic
);
1465 sprintf(enic
->msix
[intr
].devname
,
1466 "%.11s-err", netdev
->name
);
1467 enic
->msix
[intr
].isr
= enic_isr_msix_err
;
1468 enic
->msix
[intr
].devid
= enic
;
1470 intr
= enic_msix_notify_intr(enic
);
1471 sprintf(enic
->msix
[intr
].devname
,
1472 "%.11s-notify", netdev
->name
);
1473 enic
->msix
[intr
].isr
= enic_isr_msix_notify
;
1474 enic
->msix
[intr
].devid
= enic
;
1476 for (i
= 0; i
< ARRAY_SIZE(enic
->msix
); i
++)
1477 enic
->msix
[i
].requested
= 0;
1479 for (i
= 0; i
< enic
->intr_count
; i
++) {
1480 err
= request_irq(enic
->msix_entry
[i
].vector
,
1481 enic
->msix
[i
].isr
, 0,
1482 enic
->msix
[i
].devname
,
1483 enic
->msix
[i
].devid
);
1485 enic_free_intr(enic
);
1488 enic
->msix
[i
].requested
= 1;
1500 static void enic_synchronize_irqs(struct enic
*enic
)
1504 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1505 case VNIC_DEV_INTR_MODE_INTX
:
1506 case VNIC_DEV_INTR_MODE_MSI
:
1507 synchronize_irq(enic
->pdev
->irq
);
1509 case VNIC_DEV_INTR_MODE_MSIX
:
1510 for (i
= 0; i
< enic
->intr_count
; i
++)
1511 synchronize_irq(enic
->msix_entry
[i
].vector
);
1518 static int enic_dev_notify_set(struct enic
*enic
)
1522 spin_lock(&enic
->devcmd_lock
);
1523 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1524 case VNIC_DEV_INTR_MODE_INTX
:
1525 err
= vnic_dev_notify_set(enic
->vdev
,
1526 enic_legacy_notify_intr());
1528 case VNIC_DEV_INTR_MODE_MSIX
:
1529 err
= vnic_dev_notify_set(enic
->vdev
,
1530 enic_msix_notify_intr(enic
));
1533 err
= vnic_dev_notify_set(enic
->vdev
, -1 /* no intr */);
1536 spin_unlock(&enic
->devcmd_lock
);
1541 static void enic_notify_timer_start(struct enic
*enic
)
1543 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
1544 case VNIC_DEV_INTR_MODE_MSI
:
1545 mod_timer(&enic
->notify_timer
, jiffies
);
1548 /* Using intr for notification for INTx/MSI-X */
1553 /* rtnl lock is held, process context */
1554 static int enic_open(struct net_device
*netdev
)
1556 struct enic
*enic
= netdev_priv(netdev
);
1560 err
= enic_request_intr(enic
);
1562 netdev_err(netdev
, "Unable to request irq.\n");
1566 err
= enic_dev_notify_set(enic
);
1569 "Failed to alloc notify buffer, aborting.\n");
1570 goto err_out_free_intr
;
1573 for (i
= 0; i
< enic
->rq_count
; i
++) {
1574 vnic_rq_fill(&enic
->rq
[i
], enic_rq_alloc_buf
);
1575 /* Need at least one buffer on ring to get going */
1576 if (vnic_rq_desc_used(&enic
->rq
[i
]) == 0) {
1577 netdev_err(netdev
, "Unable to alloc receive buffers\n");
1579 goto err_out_notify_unset
;
1583 for (i
= 0; i
< enic
->wq_count
; i
++)
1584 vnic_wq_enable(&enic
->wq
[i
]);
1585 for (i
= 0; i
< enic
->rq_count
; i
++)
1586 vnic_rq_enable(&enic
->rq
[i
]);
1588 if (enic_is_dynamic(enic
) && !is_zero_ether_addr(enic
->pp
.mac_addr
))
1589 enic_dev_add_addr(enic
, enic
->pp
.mac_addr
);
1591 enic_dev_add_station_addr(enic
);
1592 enic_set_rx_mode(netdev
);
1594 netif_wake_queue(netdev
);
1596 for (i
= 0; i
< enic
->rq_count
; i
++)
1597 napi_enable(&enic
->napi
[i
]);
1599 enic_dev_enable(enic
);
1601 for (i
= 0; i
< enic
->intr_count
; i
++)
1602 vnic_intr_unmask(&enic
->intr
[i
]);
1604 enic_notify_timer_start(enic
);
1608 err_out_notify_unset
:
1609 enic_dev_notify_unset(enic
);
1611 enic_free_intr(enic
);
1616 /* rtnl lock is held, process context */
1617 static int enic_stop(struct net_device
*netdev
)
1619 struct enic
*enic
= netdev_priv(netdev
);
1623 for (i
= 0; i
< enic
->intr_count
; i
++) {
1624 vnic_intr_mask(&enic
->intr
[i
]);
1625 (void)vnic_intr_masked(&enic
->intr
[i
]); /* flush write */
1628 enic_synchronize_irqs(enic
);
1630 del_timer_sync(&enic
->notify_timer
);
1632 enic_dev_disable(enic
);
1634 for (i
= 0; i
< enic
->rq_count
; i
++)
1635 napi_disable(&enic
->napi
[i
]);
1637 netif_carrier_off(netdev
);
1638 netif_tx_disable(netdev
);
1639 if (enic_is_dynamic(enic
) && !is_zero_ether_addr(enic
->pp
.mac_addr
))
1640 enic_dev_del_addr(enic
, enic
->pp
.mac_addr
);
1642 enic_dev_del_station_addr(enic
);
1644 for (i
= 0; i
< enic
->wq_count
; i
++) {
1645 err
= vnic_wq_disable(&enic
->wq
[i
]);
1649 for (i
= 0; i
< enic
->rq_count
; i
++) {
1650 err
= vnic_rq_disable(&enic
->rq
[i
]);
1655 enic_dev_notify_unset(enic
);
1656 enic_free_intr(enic
);
1658 for (i
= 0; i
< enic
->wq_count
; i
++)
1659 vnic_wq_clean(&enic
->wq
[i
], enic_free_wq_buf
);
1660 for (i
= 0; i
< enic
->rq_count
; i
++)
1661 vnic_rq_clean(&enic
->rq
[i
], enic_free_rq_buf
);
1662 for (i
= 0; i
< enic
->cq_count
; i
++)
1663 vnic_cq_clean(&enic
->cq
[i
]);
1664 for (i
= 0; i
< enic
->intr_count
; i
++)
1665 vnic_intr_clean(&enic
->intr
[i
]);
1670 static int enic_change_mtu(struct net_device
*netdev
, int new_mtu
)
1672 struct enic
*enic
= netdev_priv(netdev
);
1673 int running
= netif_running(netdev
);
1675 if (new_mtu
< ENIC_MIN_MTU
|| new_mtu
> ENIC_MAX_MTU
)
1678 if (enic_is_dynamic(enic
))
1684 netdev
->mtu
= new_mtu
;
1686 if (netdev
->mtu
> enic
->port_mtu
)
1688 "interface MTU (%d) set higher than port MTU (%d)\n",
1689 netdev
->mtu
, enic
->port_mtu
);
1697 static void enic_change_mtu_work(struct work_struct
*work
)
1699 struct enic
*enic
= container_of(work
, struct enic
, change_mtu_work
);
1700 struct net_device
*netdev
= enic
->netdev
;
1701 int new_mtu
= vnic_dev_mtu(enic
->vdev
);
1705 new_mtu
= max_t(int, ENIC_MIN_MTU
, min_t(int, ENIC_MAX_MTU
, new_mtu
));
1710 del_timer_sync(&enic
->notify_timer
);
1712 for (i
= 0; i
< enic
->rq_count
; i
++)
1713 napi_disable(&enic
->napi
[i
]);
1715 vnic_intr_mask(&enic
->intr
[0]);
1716 enic_synchronize_irqs(enic
);
1717 err
= vnic_rq_disable(&enic
->rq
[0]);
1719 netdev_err(netdev
, "Unable to disable RQ.\n");
1722 vnic_rq_clean(&enic
->rq
[0], enic_free_rq_buf
);
1723 vnic_cq_clean(&enic
->cq
[0]);
1724 vnic_intr_clean(&enic
->intr
[0]);
1726 /* Fill RQ with new_mtu-sized buffers */
1727 netdev
->mtu
= new_mtu
;
1728 vnic_rq_fill(&enic
->rq
[0], enic_rq_alloc_buf
);
1729 /* Need at least one buffer on ring to get going */
1730 if (vnic_rq_desc_used(&enic
->rq
[0]) == 0) {
1731 netdev_err(netdev
, "Unable to alloc receive buffers.\n");
1736 vnic_rq_enable(&enic
->rq
[0]);
1737 napi_enable(&enic
->napi
[0]);
1738 vnic_intr_unmask(&enic
->intr
[0]);
1739 enic_notify_timer_start(enic
);
1743 netdev_info(netdev
, "interface MTU set as %d\n", netdev
->mtu
);
1746 #ifdef CONFIG_NET_POLL_CONTROLLER
1747 static void enic_poll_controller(struct net_device
*netdev
)
1749 struct enic
*enic
= netdev_priv(netdev
);
1750 struct vnic_dev
*vdev
= enic
->vdev
;
1751 unsigned int i
, intr
;
1753 switch (vnic_dev_get_intr_mode(vdev
)) {
1754 case VNIC_DEV_INTR_MODE_MSIX
:
1755 for (i
= 0; i
< enic
->rq_count
; i
++) {
1756 intr
= enic_msix_rq_intr(enic
, i
);
1757 enic_isr_msix_rq(enic
->msix_entry
[intr
].vector
,
1761 for (i
= 0; i
< enic
->wq_count
; i
++) {
1762 intr
= enic_msix_wq_intr(enic
, i
);
1763 enic_isr_msix_wq(enic
->msix_entry
[intr
].vector
, enic
);
1767 case VNIC_DEV_INTR_MODE_MSI
:
1768 enic_isr_msi(enic
->pdev
->irq
, enic
);
1770 case VNIC_DEV_INTR_MODE_INTX
:
1771 enic_isr_legacy(enic
->pdev
->irq
, netdev
);
1779 static int enic_dev_wait(struct vnic_dev
*vdev
,
1780 int (*start
)(struct vnic_dev
*, int),
1781 int (*finished
)(struct vnic_dev
*, int *),
1788 BUG_ON(in_interrupt());
1790 err
= start(vdev
, arg
);
1794 /* Wait for func to complete...2 seconds max
1797 time
= jiffies
+ (HZ
* 2);
1800 err
= finished(vdev
, &done
);
1807 schedule_timeout_uninterruptible(HZ
/ 10);
1809 } while (time_after(time
, jiffies
));
1814 static int enic_dev_open(struct enic
*enic
)
1818 err
= enic_dev_wait(enic
->vdev
, vnic_dev_open
,
1819 vnic_dev_open_done
, 0);
1821 dev_err(enic_get_dev(enic
), "vNIC device open failed, err %d\n",
1827 static int enic_dev_hang_reset(struct enic
*enic
)
1831 err
= enic_dev_wait(enic
->vdev
, vnic_dev_hang_reset
,
1832 vnic_dev_hang_reset_done
, 0);
1834 netdev_err(enic
->netdev
, "vNIC hang reset failed, err %d\n",
1840 static int enic_set_rsskey(struct enic
*enic
)
1842 dma_addr_t rss_key_buf_pa
;
1843 union vnic_rss_key
*rss_key_buf_va
= NULL
;
1844 union vnic_rss_key rss_key
= {
1845 .key
[0].b
= {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1846 .key
[1].b
= {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1847 .key
[2].b
= {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1848 .key
[3].b
= {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1852 rss_key_buf_va
= pci_alloc_consistent(enic
->pdev
,
1853 sizeof(union vnic_rss_key
), &rss_key_buf_pa
);
1854 if (!rss_key_buf_va
)
1857 memcpy(rss_key_buf_va
, &rss_key
, sizeof(union vnic_rss_key
));
1859 spin_lock(&enic
->devcmd_lock
);
1860 err
= enic_set_rss_key(enic
,
1862 sizeof(union vnic_rss_key
));
1863 spin_unlock(&enic
->devcmd_lock
);
1865 pci_free_consistent(enic
->pdev
, sizeof(union vnic_rss_key
),
1866 rss_key_buf_va
, rss_key_buf_pa
);
1871 static int enic_set_rsscpu(struct enic
*enic
, u8 rss_hash_bits
)
1873 dma_addr_t rss_cpu_buf_pa
;
1874 union vnic_rss_cpu
*rss_cpu_buf_va
= NULL
;
1878 rss_cpu_buf_va
= pci_alloc_consistent(enic
->pdev
,
1879 sizeof(union vnic_rss_cpu
), &rss_cpu_buf_pa
);
1880 if (!rss_cpu_buf_va
)
1883 for (i
= 0; i
< (1 << rss_hash_bits
); i
++)
1884 (*rss_cpu_buf_va
).cpu
[i
/4].b
[i
%4] = i
% enic
->rq_count
;
1886 spin_lock(&enic
->devcmd_lock
);
1887 err
= enic_set_rss_cpu(enic
,
1889 sizeof(union vnic_rss_cpu
));
1890 spin_unlock(&enic
->devcmd_lock
);
1892 pci_free_consistent(enic
->pdev
, sizeof(union vnic_rss_cpu
),
1893 rss_cpu_buf_va
, rss_cpu_buf_pa
);
1898 static int enic_set_niccfg(struct enic
*enic
, u8 rss_default_cpu
,
1899 u8 rss_hash_type
, u8 rss_hash_bits
, u8 rss_base_cpu
, u8 rss_enable
)
1901 const u8 tso_ipid_split_en
= 0;
1902 const u8 ig_vlan_strip_en
= 1;
1905 /* Enable VLAN tag stripping.
1908 spin_lock(&enic
->devcmd_lock
);
1909 err
= enic_set_nic_cfg(enic
,
1910 rss_default_cpu
, rss_hash_type
,
1911 rss_hash_bits
, rss_base_cpu
,
1912 rss_enable
, tso_ipid_split_en
,
1914 spin_unlock(&enic
->devcmd_lock
);
1919 static int enic_set_rss_nic_cfg(struct enic
*enic
)
1921 struct device
*dev
= enic_get_dev(enic
);
1922 const u8 rss_default_cpu
= 0;
1923 const u8 rss_hash_type
= NIC_CFG_RSS_HASH_TYPE_IPV4
|
1924 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4
|
1925 NIC_CFG_RSS_HASH_TYPE_IPV6
|
1926 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6
;
1927 const u8 rss_hash_bits
= 7;
1928 const u8 rss_base_cpu
= 0;
1929 u8 rss_enable
= ENIC_SETTING(enic
, RSS
) && (enic
->rq_count
> 1);
1932 if (!enic_set_rsskey(enic
)) {
1933 if (enic_set_rsscpu(enic
, rss_hash_bits
)) {
1935 dev_warn(dev
, "RSS disabled, "
1936 "Failed to set RSS cpu indirection table.");
1940 dev_warn(dev
, "RSS disabled, Failed to set RSS key.\n");
1944 return enic_set_niccfg(enic
, rss_default_cpu
, rss_hash_type
,
1945 rss_hash_bits
, rss_base_cpu
, rss_enable
);
1948 static void enic_reset(struct work_struct
*work
)
1950 struct enic
*enic
= container_of(work
, struct enic
, reset
);
1952 if (!netif_running(enic
->netdev
))
1957 enic_dev_hang_notify(enic
);
1958 enic_stop(enic
->netdev
);
1959 enic_dev_hang_reset(enic
);
1960 enic_reset_addr_lists(enic
);
1961 enic_init_vnic_resources(enic
);
1962 enic_set_rss_nic_cfg(enic
);
1963 enic_dev_set_ig_vlan_rewrite_mode(enic
);
1964 enic_open(enic
->netdev
);
1969 static int enic_set_intr_mode(struct enic
*enic
)
1971 unsigned int n
= min_t(unsigned int, enic
->rq_count
, ENIC_RQ_MAX
);
1972 unsigned int m
= min_t(unsigned int, enic
->wq_count
, ENIC_WQ_MAX
);
1975 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1976 * on system capabilities.
1980 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1981 * (the second to last INTR is used for WQ/RQ errors)
1982 * (the last INTR is used for notifications)
1985 BUG_ON(ARRAY_SIZE(enic
->msix_entry
) < n
+ m
+ 2);
1986 for (i
= 0; i
< n
+ m
+ 2; i
++)
1987 enic
->msix_entry
[i
].entry
= i
;
1989 /* Use multiple RQs if RSS is enabled
1992 if (ENIC_SETTING(enic
, RSS
) &&
1993 enic
->config
.intr_mode
< 1 &&
1994 enic
->rq_count
>= n
&&
1995 enic
->wq_count
>= m
&&
1996 enic
->cq_count
>= n
+ m
&&
1997 enic
->intr_count
>= n
+ m
+ 2) {
1999 if (!pci_enable_msix(enic
->pdev
, enic
->msix_entry
, n
+ m
+ 2)) {
2003 enic
->cq_count
= n
+ m
;
2004 enic
->intr_count
= n
+ m
+ 2;
2006 vnic_dev_set_intr_mode(enic
->vdev
,
2007 VNIC_DEV_INTR_MODE_MSIX
);
2013 if (enic
->config
.intr_mode
< 1 &&
2014 enic
->rq_count
>= 1 &&
2015 enic
->wq_count
>= m
&&
2016 enic
->cq_count
>= 1 + m
&&
2017 enic
->intr_count
>= 1 + m
+ 2) {
2018 if (!pci_enable_msix(enic
->pdev
, enic
->msix_entry
, 1 + m
+ 2)) {
2022 enic
->cq_count
= 1 + m
;
2023 enic
->intr_count
= 1 + m
+ 2;
2025 vnic_dev_set_intr_mode(enic
->vdev
,
2026 VNIC_DEV_INTR_MODE_MSIX
);
2034 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2037 if (enic
->config
.intr_mode
< 2 &&
2038 enic
->rq_count
>= 1 &&
2039 enic
->wq_count
>= 1 &&
2040 enic
->cq_count
>= 2 &&
2041 enic
->intr_count
>= 1 &&
2042 !pci_enable_msi(enic
->pdev
)) {
2047 enic
->intr_count
= 1;
2049 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_MSI
);
2056 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2057 * (the first INTR is used for WQ/RQ)
2058 * (the second INTR is used for WQ/RQ errors)
2059 * (the last INTR is used for notifications)
2062 if (enic
->config
.intr_mode
< 3 &&
2063 enic
->rq_count
>= 1 &&
2064 enic
->wq_count
>= 1 &&
2065 enic
->cq_count
>= 2 &&
2066 enic
->intr_count
>= 3) {
2071 enic
->intr_count
= 3;
2073 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_INTX
);
2078 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_UNKNOWN
);
2083 static void enic_clear_intr_mode(struct enic
*enic
)
2085 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
2086 case VNIC_DEV_INTR_MODE_MSIX
:
2087 pci_disable_msix(enic
->pdev
);
2089 case VNIC_DEV_INTR_MODE_MSI
:
2090 pci_disable_msi(enic
->pdev
);
2096 vnic_dev_set_intr_mode(enic
->vdev
, VNIC_DEV_INTR_MODE_UNKNOWN
);
2099 static const struct net_device_ops enic_netdev_dynamic_ops
= {
2100 .ndo_open
= enic_open
,
2101 .ndo_stop
= enic_stop
,
2102 .ndo_start_xmit
= enic_hard_start_xmit
,
2103 .ndo_get_stats64
= enic_get_stats
,
2104 .ndo_validate_addr
= eth_validate_addr
,
2105 .ndo_set_rx_mode
= enic_set_rx_mode
,
2106 .ndo_set_multicast_list
= enic_set_rx_mode
,
2107 .ndo_set_mac_address
= enic_set_mac_address_dynamic
,
2108 .ndo_change_mtu
= enic_change_mtu
,
2109 .ndo_vlan_rx_add_vid
= enic_vlan_rx_add_vid
,
2110 .ndo_vlan_rx_kill_vid
= enic_vlan_rx_kill_vid
,
2111 .ndo_tx_timeout
= enic_tx_timeout
,
2112 .ndo_set_vf_port
= enic_set_vf_port
,
2113 .ndo_get_vf_port
= enic_get_vf_port
,
2114 .ndo_set_vf_mac
= enic_set_vf_mac
,
2115 #ifdef CONFIG_NET_POLL_CONTROLLER
2116 .ndo_poll_controller
= enic_poll_controller
,
2120 static const struct net_device_ops enic_netdev_ops
= {
2121 .ndo_open
= enic_open
,
2122 .ndo_stop
= enic_stop
,
2123 .ndo_start_xmit
= enic_hard_start_xmit
,
2124 .ndo_get_stats64
= enic_get_stats
,
2125 .ndo_validate_addr
= eth_validate_addr
,
2126 .ndo_set_mac_address
= enic_set_mac_address
,
2127 .ndo_set_rx_mode
= enic_set_rx_mode
,
2128 .ndo_set_multicast_list
= enic_set_rx_mode
,
2129 .ndo_change_mtu
= enic_change_mtu
,
2130 .ndo_vlan_rx_add_vid
= enic_vlan_rx_add_vid
,
2131 .ndo_vlan_rx_kill_vid
= enic_vlan_rx_kill_vid
,
2132 .ndo_tx_timeout
= enic_tx_timeout
,
2133 #ifdef CONFIG_NET_POLL_CONTROLLER
2134 .ndo_poll_controller
= enic_poll_controller
,
2138 static void enic_dev_deinit(struct enic
*enic
)
2142 for (i
= 0; i
< enic
->rq_count
; i
++)
2143 netif_napi_del(&enic
->napi
[i
]);
2145 enic_free_vnic_resources(enic
);
2146 enic_clear_intr_mode(enic
);
2149 static int enic_dev_init(struct enic
*enic
)
2151 struct device
*dev
= enic_get_dev(enic
);
2152 struct net_device
*netdev
= enic
->netdev
;
2156 /* Get interrupt coalesce timer info */
2157 err
= enic_dev_intr_coal_timer_info(enic
);
2159 dev_warn(dev
, "Using default conversion factor for "
2160 "interrupt coalesce timer\n");
2161 vnic_dev_intr_coal_timer_info_default(enic
->vdev
);
2164 /* Get vNIC configuration
2167 err
= enic_get_vnic_config(enic
);
2169 dev_err(dev
, "Get vNIC configuration failed, aborting\n");
2173 /* Get available resource counts
2176 enic_get_res_counts(enic
);
2178 /* Set interrupt mode based on resource counts and system
2182 err
= enic_set_intr_mode(enic
);
2184 dev_err(dev
, "Failed to set intr mode based on resource "
2185 "counts and system capabilities, aborting\n");
2189 /* Allocate and configure vNIC resources
2192 err
= enic_alloc_vnic_resources(enic
);
2194 dev_err(dev
, "Failed to alloc vNIC resources, aborting\n");
2195 goto err_out_free_vnic_resources
;
2198 enic_init_vnic_resources(enic
);
2200 err
= enic_set_rss_nic_cfg(enic
);
2202 dev_err(dev
, "Failed to config nic, aborting\n");
2203 goto err_out_free_vnic_resources
;
2206 switch (vnic_dev_get_intr_mode(enic
->vdev
)) {
2208 netif_napi_add(netdev
, &enic
->napi
[0], enic_poll
, 64);
2210 case VNIC_DEV_INTR_MODE_MSIX
:
2211 for (i
= 0; i
< enic
->rq_count
; i
++)
2212 netif_napi_add(netdev
, &enic
->napi
[i
],
2213 enic_poll_msix
, 64);
2219 err_out_free_vnic_resources
:
2220 enic_clear_intr_mode(enic
);
2221 enic_free_vnic_resources(enic
);
2226 static void enic_iounmap(struct enic
*enic
)
2230 for (i
= 0; i
< ARRAY_SIZE(enic
->bar
); i
++)
2231 if (enic
->bar
[i
].vaddr
)
2232 iounmap(enic
->bar
[i
].vaddr
);
2235 static int __devinit
enic_probe(struct pci_dev
*pdev
,
2236 const struct pci_device_id
*ent
)
2238 struct device
*dev
= &pdev
->dev
;
2239 struct net_device
*netdev
;
2245 /* Allocate net device structure and initialize. Private
2246 * instance data is initialized to zero.
2249 netdev
= alloc_etherdev(sizeof(struct enic
));
2251 pr_err("Etherdev alloc failed, aborting\n");
2255 pci_set_drvdata(pdev
, netdev
);
2257 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2259 enic
= netdev_priv(netdev
);
2260 enic
->netdev
= netdev
;
2263 /* Setup PCI resources
2266 err
= pci_enable_device_mem(pdev
);
2268 dev_err(dev
, "Cannot enable PCI device, aborting\n");
2269 goto err_out_free_netdev
;
2272 err
= pci_request_regions(pdev
, DRV_NAME
);
2274 dev_err(dev
, "Cannot request PCI regions, aborting\n");
2275 goto err_out_disable_device
;
2278 pci_set_master(pdev
);
2280 /* Query PCI controller on system for DMA addressing
2281 * limitation for the device. Try 40-bit first, and
2285 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(40));
2287 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
2289 dev_err(dev
, "No usable DMA configuration, aborting\n");
2290 goto err_out_release_regions
;
2292 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
2294 dev_err(dev
, "Unable to obtain %u-bit DMA "
2295 "for consistent allocations, aborting\n", 32);
2296 goto err_out_release_regions
;
2299 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(40));
2301 dev_err(dev
, "Unable to obtain %u-bit DMA "
2302 "for consistent allocations, aborting\n", 40);
2303 goto err_out_release_regions
;
2308 /* Map vNIC resources from BAR0-5
2311 for (i
= 0; i
< ARRAY_SIZE(enic
->bar
); i
++) {
2312 if (!(pci_resource_flags(pdev
, i
) & IORESOURCE_MEM
))
2314 enic
->bar
[i
].len
= pci_resource_len(pdev
, i
);
2315 enic
->bar
[i
].vaddr
= pci_iomap(pdev
, i
, enic
->bar
[i
].len
);
2316 if (!enic
->bar
[i
].vaddr
) {
2317 dev_err(dev
, "Cannot memory-map BAR %d, aborting\n", i
);
2319 goto err_out_iounmap
;
2321 enic
->bar
[i
].bus_addr
= pci_resource_start(pdev
, i
);
2324 /* Register vNIC device
2327 enic
->vdev
= vnic_dev_register(NULL
, enic
, pdev
, enic
->bar
,
2328 ARRAY_SIZE(enic
->bar
));
2330 dev_err(dev
, "vNIC registration failed, aborting\n");
2332 goto err_out_iounmap
;
2335 /* Issue device open to get device in known state
2338 err
= enic_dev_open(enic
);
2340 dev_err(dev
, "vNIC dev open failed, aborting\n");
2341 goto err_out_vnic_unregister
;
2344 /* Setup devcmd lock
2347 spin_lock_init(&enic
->devcmd_lock
);
2350 * Set ingress vlan rewrite mode before vnic initialization
2353 err
= enic_dev_set_ig_vlan_rewrite_mode(enic
);
2356 "Failed to set ingress vlan rewrite mode, aborting.\n");
2357 goto err_out_dev_close
;
2360 /* Issue device init to initialize the vnic-to-switch link.
2361 * We'll start with carrier off and wait for link UP
2362 * notification later to turn on carrier. We don't need
2363 * to wait here for the vnic-to-switch link initialization
2364 * to complete; link UP notification is the indication that
2365 * the process is complete.
2368 netif_carrier_off(netdev
);
2370 /* Do not call dev_init for a dynamic vnic.
2371 * For a dynamic vnic, init_prov_info will be
2372 * called later by an upper layer.
2375 if (!enic_is_dynamic(enic
)) {
2376 err
= vnic_dev_init(enic
->vdev
, 0);
2378 dev_err(dev
, "vNIC dev init failed, aborting\n");
2379 goto err_out_dev_close
;
2383 err
= enic_dev_init(enic
);
2385 dev_err(dev
, "Device initialization failed, aborting\n");
2386 goto err_out_dev_close
;
2389 /* Setup notification timer, HW reset task, and wq locks
2392 init_timer(&enic
->notify_timer
);
2393 enic
->notify_timer
.function
= enic_notify_timer
;
2394 enic
->notify_timer
.data
= (unsigned long)enic
;
2396 INIT_WORK(&enic
->reset
, enic_reset
);
2397 INIT_WORK(&enic
->change_mtu_work
, enic_change_mtu_work
);
2399 for (i
= 0; i
< enic
->wq_count
; i
++)
2400 spin_lock_init(&enic
->wq_lock
[i
]);
2402 /* Register net device
2405 enic
->port_mtu
= enic
->config
.mtu
;
2406 (void)enic_change_mtu(netdev
, enic
->port_mtu
);
2408 err
= enic_set_mac_addr(netdev
, enic
->mac_addr
);
2410 dev_err(dev
, "Invalid MAC address, aborting\n");
2411 goto err_out_dev_deinit
;
2414 enic
->tx_coalesce_usecs
= enic
->config
.intr_timer_usec
;
2415 enic
->rx_coalesce_usecs
= enic
->tx_coalesce_usecs
;
2417 if (enic_is_dynamic(enic
))
2418 netdev
->netdev_ops
= &enic_netdev_dynamic_ops
;
2420 netdev
->netdev_ops
= &enic_netdev_ops
;
2422 netdev
->watchdog_timeo
= 2 * HZ
;
2423 netdev
->ethtool_ops
= &enic_ethtool_ops
;
2425 netdev
->features
|= NETIF_F_HW_VLAN_TX
| NETIF_F_HW_VLAN_RX
;
2426 if (ENIC_SETTING(enic
, LOOP
)) {
2427 netdev
->features
&= ~NETIF_F_HW_VLAN_TX
;
2428 enic
->loop_enable
= 1;
2429 enic
->loop_tag
= enic
->config
.loop_tag
;
2430 dev_info(dev
, "loopback tag=0x%04x\n", enic
->loop_tag
);
2432 if (ENIC_SETTING(enic
, TXCSUM
))
2433 netdev
->hw_features
|= NETIF_F_SG
| NETIF_F_HW_CSUM
;
2434 if (ENIC_SETTING(enic
, TSO
))
2435 netdev
->hw_features
|= NETIF_F_TSO
|
2436 NETIF_F_TSO6
| NETIF_F_TSO_ECN
;
2437 if (ENIC_SETTING(enic
, RXCSUM
))
2438 netdev
->hw_features
|= NETIF_F_RXCSUM
;
2440 netdev
->features
|= netdev
->hw_features
;
2443 netdev
->features
|= NETIF_F_HIGHDMA
;
2445 err
= register_netdev(netdev
);
2447 dev_err(dev
, "Cannot register net device, aborting\n");
2448 goto err_out_dev_deinit
;
2454 enic_dev_deinit(enic
);
2456 vnic_dev_close(enic
->vdev
);
2457 err_out_vnic_unregister
:
2458 vnic_dev_unregister(enic
->vdev
);
2461 err_out_release_regions
:
2462 pci_release_regions(pdev
);
2463 err_out_disable_device
:
2464 pci_disable_device(pdev
);
2465 err_out_free_netdev
:
2466 pci_set_drvdata(pdev
, NULL
);
2467 free_netdev(netdev
);
2472 static void __devexit
enic_remove(struct pci_dev
*pdev
)
2474 struct net_device
*netdev
= pci_get_drvdata(pdev
);
2477 struct enic
*enic
= netdev_priv(netdev
);
2479 cancel_work_sync(&enic
->reset
);
2480 cancel_work_sync(&enic
->change_mtu_work
);
2481 unregister_netdev(netdev
);
2482 enic_dev_deinit(enic
);
2483 vnic_dev_close(enic
->vdev
);
2484 vnic_dev_unregister(enic
->vdev
);
2486 pci_release_regions(pdev
);
2487 pci_disable_device(pdev
);
2488 pci_set_drvdata(pdev
, NULL
);
2489 free_netdev(netdev
);
2493 static struct pci_driver enic_driver
= {
2495 .id_table
= enic_id_table
,
2496 .probe
= enic_probe
,
2497 .remove
= __devexit_p(enic_remove
),
2500 static int __init
enic_init_module(void)
2502 pr_info("%s, ver %s\n", DRV_DESCRIPTION
, DRV_VERSION
);
2504 return pci_register_driver(&enic_driver
);
2507 static void __exit
enic_cleanup_module(void)
2509 pci_unregister_driver(&enic_driver
);
2512 module_init(enic_init_module
);
2513 module_exit(enic_cleanup_module
);