2 * Copyright (C) 2015 Netronome Systems, Inc.
4 * This software is dual licensed under the GNU General License Version 2,
5 * June 1991 as shown in the file COPYING in the top-level directory of this
6 * source tree or the BSD 2-Clause License provided below. You have the
7 * option to license this software under the complete terms of either license.
9 * The BSD 2-Clause License:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * 1. Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * 2. Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * Netronome network device driver: ethtool support
37 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
38 * Jason McMullan <jason.mcmullan@netronome.com>
39 * Rolf Neugebauer <rolf.neugebauer@netronome.com>
40 * Brad Petrus <brad.petrus@netronome.com>
43 #include <linux/version.h>
44 #include <linux/kernel.h>
45 #include <linux/netdevice.h>
46 #include <linux/etherdevice.h>
47 #include <linux/interrupt.h>
48 #include <linux/pci.h>
49 #include <linux/ethtool.h>
51 #include "nfp_net_ctrl.h"
54 /* Support for stats. Returns netdev, driver, and device stats */
55 enum { NETDEV_ET_STATS
, NFP_NET_DRV_ET_STATS
, NFP_NET_DEV_ET_STATS
};
56 struct _nfp_net_et_stats
{
57 char name
[ETH_GSTRING_LEN
];
63 #define NN_ET_NETDEV_STAT(m) NETDEV_ET_STATS, \
64 FIELD_SIZEOF(struct net_device_stats, m), \
65 offsetof(struct net_device_stats, m)
66 /* For stats in the control BAR (other than Q stats) */
67 #define NN_ET_DEV_STAT(m) NFP_NET_DEV_ET_STATS, \
70 static const struct _nfp_net_et_stats nfp_net_et_stats
[] = {
72 {"rx_packets", NN_ET_NETDEV_STAT(rx_packets
)},
73 {"tx_packets", NN_ET_NETDEV_STAT(tx_packets
)},
74 {"rx_bytes", NN_ET_NETDEV_STAT(rx_bytes
)},
75 {"tx_bytes", NN_ET_NETDEV_STAT(tx_bytes
)},
76 {"rx_errors", NN_ET_NETDEV_STAT(rx_errors
)},
77 {"tx_errors", NN_ET_NETDEV_STAT(tx_errors
)},
78 {"rx_dropped", NN_ET_NETDEV_STAT(rx_dropped
)},
79 {"tx_dropped", NN_ET_NETDEV_STAT(tx_dropped
)},
80 {"multicast", NN_ET_NETDEV_STAT(multicast
)},
81 {"collisions", NN_ET_NETDEV_STAT(collisions
)},
82 {"rx_over_errors", NN_ET_NETDEV_STAT(rx_over_errors
)},
83 {"rx_crc_errors", NN_ET_NETDEV_STAT(rx_crc_errors
)},
84 {"rx_frame_errors", NN_ET_NETDEV_STAT(rx_frame_errors
)},
85 {"rx_fifo_errors", NN_ET_NETDEV_STAT(rx_fifo_errors
)},
86 {"rx_missed_errors", NN_ET_NETDEV_STAT(rx_missed_errors
)},
87 {"tx_aborted_errors", NN_ET_NETDEV_STAT(tx_aborted_errors
)},
88 {"tx_carrier_errors", NN_ET_NETDEV_STAT(tx_carrier_errors
)},
89 {"tx_fifo_errors", NN_ET_NETDEV_STAT(tx_fifo_errors
)},
90 /* Stats from the device */
91 {"dev_rx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_DISCARDS
)},
92 {"dev_rx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_ERRORS
)},
93 {"dev_rx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_OCTETS
)},
94 {"dev_rx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_UC_OCTETS
)},
95 {"dev_rx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_OCTETS
)},
96 {"dev_rx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_OCTETS
)},
97 {"dev_rx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_FRAMES
)},
98 {"dev_rx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_MC_FRAMES
)},
99 {"dev_rx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_RX_BC_FRAMES
)},
101 {"dev_tx_discards", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_DISCARDS
)},
102 {"dev_tx_errors", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_ERRORS
)},
103 {"dev_tx_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_OCTETS
)},
104 {"dev_tx_uc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_UC_OCTETS
)},
105 {"dev_tx_mc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_OCTETS
)},
106 {"dev_tx_bc_bytes", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_OCTETS
)},
107 {"dev_tx_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_FRAMES
)},
108 {"dev_tx_mc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_MC_FRAMES
)},
109 {"dev_tx_bc_pkts", NN_ET_DEV_STAT(NFP_NET_CFG_STATS_TX_BC_FRAMES
)},
112 #define NN_ET_GLOBAL_STATS_LEN ARRAY_SIZE(nfp_net_et_stats)
113 #define NN_ET_RVEC_STATS_LEN (nn->num_r_vecs * 3)
114 #define NN_ET_RVEC_GATHER_STATS 7
115 #define NN_ET_QUEUE_STATS_LEN ((nn->num_tx_rings + nn->num_rx_rings) * 2)
116 #define NN_ET_STATS_LEN (NN_ET_GLOBAL_STATS_LEN + NN_ET_RVEC_GATHER_STATS + \
117 NN_ET_RVEC_STATS_LEN + NN_ET_QUEUE_STATS_LEN)
119 static void nfp_net_get_drvinfo(struct net_device
*netdev
,
120 struct ethtool_drvinfo
*drvinfo
)
122 struct nfp_net
*nn
= netdev_priv(netdev
);
124 strlcpy(drvinfo
->driver
, nfp_net_driver_name
, sizeof(drvinfo
->driver
));
125 strlcpy(drvinfo
->version
, nfp_net_driver_version
,
126 sizeof(drvinfo
->version
));
128 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
),
130 nn
->fw_ver
.resv
, nn
->fw_ver
.class,
131 nn
->fw_ver
.major
, nn
->fw_ver
.minor
);
132 strlcpy(drvinfo
->bus_info
, pci_name(nn
->pdev
),
133 sizeof(drvinfo
->bus_info
));
135 drvinfo
->n_stats
= NN_ET_STATS_LEN
;
136 drvinfo
->regdump_len
= NFP_NET_CFG_BAR_SZ
;
139 static void nfp_net_get_ringparam(struct net_device
*netdev
,
140 struct ethtool_ringparam
*ring
)
142 struct nfp_net
*nn
= netdev_priv(netdev
);
144 ring
->rx_max_pending
= NFP_NET_MAX_RX_DESCS
;
145 ring
->tx_max_pending
= NFP_NET_MAX_TX_DESCS
;
146 ring
->rx_pending
= nn
->rxd_cnt
;
147 ring
->tx_pending
= nn
->txd_cnt
;
150 static int nfp_net_set_ringparam(struct net_device
*netdev
,
151 struct ethtool_ringparam
*ring
)
153 struct nfp_net
*nn
= netdev_priv(netdev
);
154 u32 rxd_cnt
, txd_cnt
;
156 /* We don't have separate queues/rings for small/large frames. */
157 if (ring
->rx_mini_pending
|| ring
->rx_jumbo_pending
)
160 /* Round up to supported values */
161 rxd_cnt
= roundup_pow_of_two(ring
->rx_pending
);
162 txd_cnt
= roundup_pow_of_two(ring
->tx_pending
);
164 if (rxd_cnt
< NFP_NET_MIN_RX_DESCS
|| rxd_cnt
> NFP_NET_MAX_RX_DESCS
||
165 txd_cnt
< NFP_NET_MIN_TX_DESCS
|| txd_cnt
> NFP_NET_MAX_TX_DESCS
)
168 if (nn
->rxd_cnt
== rxd_cnt
&& nn
->txd_cnt
== txd_cnt
)
171 nn_dbg(nn
, "Change ring size: RxQ %u->%u, TxQ %u->%u\n",
172 nn
->rxd_cnt
, rxd_cnt
, nn
->txd_cnt
, txd_cnt
);
174 return nfp_net_set_ring_size(nn
, rxd_cnt
, txd_cnt
);
177 static void nfp_net_get_strings(struct net_device
*netdev
,
178 u32 stringset
, u8
*data
)
180 struct nfp_net
*nn
= netdev_priv(netdev
);
186 for (i
= 0; i
< NN_ET_GLOBAL_STATS_LEN
; i
++) {
187 memcpy(p
, nfp_net_et_stats
[i
].name
, ETH_GSTRING_LEN
);
188 p
+= ETH_GSTRING_LEN
;
190 for (i
= 0; i
< nn
->num_r_vecs
; i
++) {
191 sprintf(p
, "rvec_%u_rx_pkts", i
);
192 p
+= ETH_GSTRING_LEN
;
193 sprintf(p
, "rvec_%u_tx_pkts", i
);
194 p
+= ETH_GSTRING_LEN
;
195 sprintf(p
, "rvec_%u_tx_busy", i
);
196 p
+= ETH_GSTRING_LEN
;
198 strncpy(p
, "hw_rx_csum_ok", ETH_GSTRING_LEN
);
199 p
+= ETH_GSTRING_LEN
;
200 strncpy(p
, "hw_rx_csum_inner_ok", ETH_GSTRING_LEN
);
201 p
+= ETH_GSTRING_LEN
;
202 strncpy(p
, "hw_rx_csum_err", ETH_GSTRING_LEN
);
203 p
+= ETH_GSTRING_LEN
;
204 strncpy(p
, "hw_tx_csum", ETH_GSTRING_LEN
);
205 p
+= ETH_GSTRING_LEN
;
206 strncpy(p
, "hw_tx_inner_csum", ETH_GSTRING_LEN
);
207 p
+= ETH_GSTRING_LEN
;
208 strncpy(p
, "tx_gather", ETH_GSTRING_LEN
);
209 p
+= ETH_GSTRING_LEN
;
210 strncpy(p
, "tx_lso", ETH_GSTRING_LEN
);
211 p
+= ETH_GSTRING_LEN
;
212 for (i
= 0; i
< nn
->num_tx_rings
; i
++) {
213 sprintf(p
, "txq_%u_pkts", i
);
214 p
+= ETH_GSTRING_LEN
;
215 sprintf(p
, "txq_%u_bytes", i
);
216 p
+= ETH_GSTRING_LEN
;
218 for (i
= 0; i
< nn
->num_rx_rings
; i
++) {
219 sprintf(p
, "rxq_%u_pkts", i
);
220 p
+= ETH_GSTRING_LEN
;
221 sprintf(p
, "rxq_%u_bytes", i
);
222 p
+= ETH_GSTRING_LEN
;
228 static void nfp_net_get_stats(struct net_device
*netdev
,
229 struct ethtool_stats
*stats
, u64
*data
)
231 u64 gathered_stats
[NN_ET_RVEC_GATHER_STATS
] = {};
232 struct nfp_net
*nn
= netdev_priv(netdev
);
233 struct rtnl_link_stats64
*netdev_stats
;
234 struct rtnl_link_stats64 temp
= {};
235 u64 tmp
[NN_ET_RVEC_GATHER_STATS
];
240 netdev_stats
= dev_get_stats(netdev
, &temp
);
242 for (i
= 0; i
< NN_ET_GLOBAL_STATS_LEN
; i
++) {
243 switch (nfp_net_et_stats
[i
].type
) {
244 case NETDEV_ET_STATS
:
245 p
= (char *)netdev_stats
+ nfp_net_et_stats
[i
].off
;
246 data
[i
] = nfp_net_et_stats
[i
].sz
== sizeof(u64
) ?
247 *(u64
*)p
: *(u32
*)p
;
250 case NFP_NET_DEV_ET_STATS
:
251 io_p
= nn
->ctrl_bar
+ nfp_net_et_stats
[i
].off
;
252 data
[i
] = readq(io_p
);
256 for (j
= 0; j
< nn
->num_r_vecs
; j
++) {
260 start
= u64_stats_fetch_begin(&nn
->r_vecs
[j
].rx_sync
);
261 data
[i
++] = nn
->r_vecs
[j
].rx_pkts
;
262 tmp
[0] = nn
->r_vecs
[j
].hw_csum_rx_ok
;
263 tmp
[1] = nn
->r_vecs
[j
].hw_csum_rx_inner_ok
;
264 tmp
[2] = nn
->r_vecs
[j
].hw_csum_rx_error
;
265 } while (u64_stats_fetch_retry(&nn
->r_vecs
[j
].rx_sync
, start
));
268 start
= u64_stats_fetch_begin(&nn
->r_vecs
[j
].tx_sync
);
269 data
[i
++] = nn
->r_vecs
[j
].tx_pkts
;
270 data
[i
++] = nn
->r_vecs
[j
].tx_busy
;
271 tmp
[3] = nn
->r_vecs
[j
].hw_csum_tx
;
272 tmp
[4] = nn
->r_vecs
[j
].hw_csum_tx_inner
;
273 tmp
[5] = nn
->r_vecs
[j
].tx_gather
;
274 tmp
[6] = nn
->r_vecs
[j
].tx_lso
;
275 } while (u64_stats_fetch_retry(&nn
->r_vecs
[j
].tx_sync
, start
));
277 for (k
= 0; k
< NN_ET_RVEC_GATHER_STATS
; k
++)
278 gathered_stats
[k
] += tmp
[k
];
280 for (j
= 0; j
< NN_ET_RVEC_GATHER_STATS
; j
++)
281 data
[i
++] = gathered_stats
[j
];
282 for (j
= 0; j
< nn
->num_tx_rings
; j
++) {
283 io_p
= nn
->ctrl_bar
+ NFP_NET_CFG_TXR_STATS(j
);
284 data
[i
++] = readq(io_p
);
285 io_p
= nn
->ctrl_bar
+ NFP_NET_CFG_TXR_STATS(j
) + 8;
286 data
[i
++] = readq(io_p
);
288 for (j
= 0; j
< nn
->num_rx_rings
; j
++) {
289 io_p
= nn
->ctrl_bar
+ NFP_NET_CFG_RXR_STATS(j
);
290 data
[i
++] = readq(io_p
);
291 io_p
= nn
->ctrl_bar
+ NFP_NET_CFG_RXR_STATS(j
) + 8;
292 data
[i
++] = readq(io_p
);
296 static int nfp_net_get_sset_count(struct net_device
*netdev
, int sset
)
298 struct nfp_net
*nn
= netdev_priv(netdev
);
302 return NN_ET_STATS_LEN
;
308 /* RX network flow classification (RSS, filters, etc)
310 static u32
ethtool_flow_to_nfp_flag(u32 flow_type
)
312 static const u32 xlate_ethtool_to_nfp
[IPV6_FLOW
+ 1] = {
313 [TCP_V4_FLOW
] = NFP_NET_CFG_RSS_IPV4_TCP
,
314 [TCP_V6_FLOW
] = NFP_NET_CFG_RSS_IPV6_TCP
,
315 [UDP_V4_FLOW
] = NFP_NET_CFG_RSS_IPV4_UDP
,
316 [UDP_V6_FLOW
] = NFP_NET_CFG_RSS_IPV6_UDP
,
317 [IPV4_FLOW
] = NFP_NET_CFG_RSS_IPV4
,
318 [IPV6_FLOW
] = NFP_NET_CFG_RSS_IPV6
,
321 if (flow_type
>= ARRAY_SIZE(xlate_ethtool_to_nfp
))
324 return xlate_ethtool_to_nfp
[flow_type
];
327 static int nfp_net_get_rss_hash_opts(struct nfp_net
*nn
,
328 struct ethtool_rxnfc
*cmd
)
334 if (!(nn
->cap
& NFP_NET_CFG_CTRL_RSS
))
337 nfp_rss_flag
= ethtool_flow_to_nfp_flag(cmd
->flow_type
);
341 cmd
->data
|= RXH_IP_SRC
| RXH_IP_DST
;
342 if (nn
->rss_cfg
& nfp_rss_flag
)
343 cmd
->data
|= RXH_L4_B_0_1
| RXH_L4_B_2_3
;
348 static int nfp_net_get_rxnfc(struct net_device
*netdev
,
349 struct ethtool_rxnfc
*cmd
, u32
*rule_locs
)
351 struct nfp_net
*nn
= netdev_priv(netdev
);
354 case ETHTOOL_GRXRINGS
:
355 cmd
->data
= nn
->num_rx_rings
;
358 return nfp_net_get_rss_hash_opts(nn
, cmd
);
364 static int nfp_net_set_rss_hash_opt(struct nfp_net
*nn
,
365 struct ethtool_rxnfc
*nfc
)
367 u32 new_rss_cfg
= nn
->rss_cfg
;
371 if (!(nn
->cap
& NFP_NET_CFG_CTRL_RSS
))
374 /* RSS only supports IP SA/DA and L4 src/dst ports */
375 if (nfc
->data
& ~(RXH_IP_SRC
| RXH_IP_DST
|
376 RXH_L4_B_0_1
| RXH_L4_B_2_3
))
379 /* We need at least the IP SA/DA fields for hashing */
380 if (!(nfc
->data
& RXH_IP_SRC
) ||
381 !(nfc
->data
& RXH_IP_DST
))
384 nfp_rss_flag
= ethtool_flow_to_nfp_flag(nfc
->flow_type
);
388 switch (nfc
->data
& (RXH_L4_B_0_1
| RXH_L4_B_2_3
)) {
390 new_rss_cfg
&= ~nfp_rss_flag
;
392 case (RXH_L4_B_0_1
| RXH_L4_B_2_3
):
393 new_rss_cfg
|= nfp_rss_flag
;
399 new_rss_cfg
|= NFP_NET_CFG_RSS_TOEPLITZ
;
400 new_rss_cfg
|= NFP_NET_CFG_RSS_MASK
;
402 if (new_rss_cfg
== nn
->rss_cfg
)
405 writel(new_rss_cfg
, nn
->ctrl_bar
+ NFP_NET_CFG_RSS_CTRL
);
406 err
= nfp_net_reconfig(nn
, NFP_NET_CFG_UPDATE_RSS
);
410 nn
->rss_cfg
= new_rss_cfg
;
412 nn_dbg(nn
, "Changed RSS config to 0x%x\n", nn
->rss_cfg
);
416 static int nfp_net_set_rxnfc(struct net_device
*netdev
,
417 struct ethtool_rxnfc
*cmd
)
419 struct nfp_net
*nn
= netdev_priv(netdev
);
423 return nfp_net_set_rss_hash_opt(nn
, cmd
);
429 static u32
nfp_net_get_rxfh_indir_size(struct net_device
*netdev
)
431 struct nfp_net
*nn
= netdev_priv(netdev
);
433 if (!(nn
->cap
& NFP_NET_CFG_CTRL_RSS
))
436 return ARRAY_SIZE(nn
->rss_itbl
);
439 static u32
nfp_net_get_rxfh_key_size(struct net_device
*netdev
)
441 return NFP_NET_CFG_RSS_KEY_SZ
;
444 static int nfp_net_get_rxfh(struct net_device
*netdev
, u32
*indir
, u8
*key
,
447 struct nfp_net
*nn
= netdev_priv(netdev
);
450 if (!(nn
->cap
& NFP_NET_CFG_CTRL_RSS
))
454 for (i
= 0; i
< ARRAY_SIZE(nn
->rss_itbl
); i
++)
455 indir
[i
] = nn
->rss_itbl
[i
];
457 memcpy(key
, nn
->rss_key
, NFP_NET_CFG_RSS_KEY_SZ
);
459 *hfunc
= ETH_RSS_HASH_TOP
;
464 static int nfp_net_set_rxfh(struct net_device
*netdev
,
465 const u32
*indir
, const u8
*key
,
468 struct nfp_net
*nn
= netdev_priv(netdev
);
471 if (!(nn
->cap
& NFP_NET_CFG_CTRL_RSS
) ||
472 !(hfunc
== ETH_RSS_HASH_NO_CHANGE
|| hfunc
== ETH_RSS_HASH_TOP
))
479 memcpy(nn
->rss_key
, key
, NFP_NET_CFG_RSS_KEY_SZ
);
480 nfp_net_rss_write_key(nn
);
483 for (i
= 0; i
< ARRAY_SIZE(nn
->rss_itbl
); i
++)
484 nn
->rss_itbl
[i
] = indir
[i
];
486 nfp_net_rss_write_itbl(nn
);
489 return nfp_net_reconfig(nn
, NFP_NET_CFG_UPDATE_RSS
);
492 /* Dump BAR registers
494 static int nfp_net_get_regs_len(struct net_device
*netdev
)
496 return NFP_NET_CFG_BAR_SZ
;
499 static void nfp_net_get_regs(struct net_device
*netdev
,
500 struct ethtool_regs
*regs
, void *p
)
502 struct nfp_net
*nn
= netdev_priv(netdev
);
506 regs
->version
= nn_readl(nn
, NFP_NET_CFG_VERSION
);
508 for (i
= 0; i
< NFP_NET_CFG_BAR_SZ
/ sizeof(u32
); i
++)
509 regs_buf
[i
] = readl(nn
->ctrl_bar
+ (i
* sizeof(u32
)));
512 static int nfp_net_get_coalesce(struct net_device
*netdev
,
513 struct ethtool_coalesce
*ec
)
515 struct nfp_net
*nn
= netdev_priv(netdev
);
517 if (!(nn
->cap
& NFP_NET_CFG_CTRL_IRQMOD
))
520 ec
->rx_coalesce_usecs
= nn
->rx_coalesce_usecs
;
521 ec
->rx_max_coalesced_frames
= nn
->rx_coalesce_max_frames
;
522 ec
->tx_coalesce_usecs
= nn
->tx_coalesce_usecs
;
523 ec
->tx_max_coalesced_frames
= nn
->tx_coalesce_max_frames
;
528 static int nfp_net_set_coalesce(struct net_device
*netdev
,
529 struct ethtool_coalesce
*ec
)
531 struct nfp_net
*nn
= netdev_priv(netdev
);
534 if (ec
->rx_coalesce_usecs_irq
||
535 ec
->rx_max_coalesced_frames_irq
||
536 ec
->tx_coalesce_usecs_irq
||
537 ec
->tx_max_coalesced_frames_irq
||
538 ec
->stats_block_coalesce_usecs
||
539 ec
->use_adaptive_rx_coalesce
||
540 ec
->use_adaptive_tx_coalesce
||
542 ec
->rx_coalesce_usecs_low
||
543 ec
->rx_max_coalesced_frames_low
||
544 ec
->tx_coalesce_usecs_low
||
545 ec
->tx_max_coalesced_frames_low
||
547 ec
->rx_coalesce_usecs_high
||
548 ec
->rx_max_coalesced_frames_high
||
549 ec
->tx_coalesce_usecs_high
||
550 ec
->tx_max_coalesced_frames_high
||
551 ec
->rate_sample_interval
)
554 /* Compute factor used to convert coalesce '_usecs' parameters to
555 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
558 factor
= nn
->me_freq_mhz
/ 16;
560 /* Each pair of (usecs, max_frames) fields specifies that interrupts
561 * should be coalesced until
562 * (usecs > 0 && time_since_first_completion >= usecs) ||
563 * (max_frames > 0 && completed_frames >= max_frames)
565 * It is illegal to set both usecs and max_frames to zero as this would
566 * cause interrupts to never be generated. To disable coalescing, set
567 * usecs = 0 and max_frames = 1.
569 * Some implementations ignore the value of max_frames and use the
570 * condition time_since_first_completion >= usecs
573 if (!(nn
->cap
& NFP_NET_CFG_CTRL_IRQMOD
))
576 /* ensure valid configuration */
577 if (!ec
->rx_coalesce_usecs
&& !ec
->rx_max_coalesced_frames
)
580 if (!ec
->tx_coalesce_usecs
&& !ec
->tx_max_coalesced_frames
)
583 if (ec
->rx_coalesce_usecs
* factor
>= ((1 << 16) - 1))
586 if (ec
->tx_coalesce_usecs
* factor
>= ((1 << 16) - 1))
589 if (ec
->rx_max_coalesced_frames
>= ((1 << 16) - 1))
592 if (ec
->tx_max_coalesced_frames
>= ((1 << 16) - 1))
595 /* configuration is valid */
596 nn
->rx_coalesce_usecs
= ec
->rx_coalesce_usecs
;
597 nn
->rx_coalesce_max_frames
= ec
->rx_max_coalesced_frames
;
598 nn
->tx_coalesce_usecs
= ec
->tx_coalesce_usecs
;
599 nn
->tx_coalesce_max_frames
= ec
->tx_max_coalesced_frames
;
601 /* write configuration to device */
602 nfp_net_coalesce_write_cfg(nn
);
603 return nfp_net_reconfig(nn
, NFP_NET_CFG_UPDATE_IRQMOD
);
606 static const struct ethtool_ops nfp_net_ethtool_ops
= {
607 .get_drvinfo
= nfp_net_get_drvinfo
,
608 .get_link
= ethtool_op_get_link
,
609 .get_ringparam
= nfp_net_get_ringparam
,
610 .set_ringparam
= nfp_net_set_ringparam
,
611 .get_strings
= nfp_net_get_strings
,
612 .get_ethtool_stats
= nfp_net_get_stats
,
613 .get_sset_count
= nfp_net_get_sset_count
,
614 .get_rxnfc
= nfp_net_get_rxnfc
,
615 .set_rxnfc
= nfp_net_set_rxnfc
,
616 .get_rxfh_indir_size
= nfp_net_get_rxfh_indir_size
,
617 .get_rxfh_key_size
= nfp_net_get_rxfh_key_size
,
618 .get_rxfh
= nfp_net_get_rxfh
,
619 .set_rxfh
= nfp_net_set_rxfh
,
620 .get_regs_len
= nfp_net_get_regs_len
,
621 .get_regs
= nfp_net_get_regs
,
622 .get_coalesce
= nfp_net_get_coalesce
,
623 .set_coalesce
= nfp_net_set_coalesce
,
626 void nfp_net_set_ethtool_ops(struct net_device
*netdev
)
628 netdev
->ethtool_ops
= &nfp_net_ethtool_ops
;