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Message-Id: <20190301081532.11771-5-jeffrey.t.kirsher@intel.com>
Date: Fri, 1 Mar 2019 00:15:31 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: linville@...driver.com
Cc: Nicholas Nunley <nicholas.d.nunley@...el.com>,
netdev@...r.kernel.org
Subject: [PATCH v3 5/6] ethtool: support per-queue sub command --coalesce
From: Nicholas Nunley <nicholas.d.nunley@...el.com>
This patch adds the ability to configure the coalesce settings from
do_scoalesce on a per-queue basis.
For each masked queue the current settings are read, modified, and written
back to the kernel.
Example:
$ sudo ./ethtool --per-queue eth5 queue_mask 0x1 --coalesce
rx-usecs 10 tx-usecs 5
$ sudo ./ethtool --per-queue eth5 queue_mask 0x1 --show-coalesce
Queue: 0
Adaptive RX: on TX: on
stats-block-usecs: 0
sample-interval: 0
pkt-rate-low: 0
pkt-rate-high: 0
rx-usecs: 10
rx-frames: 0
rx-usecs-irq: 0
rx-frames-irq: 256
tx-usecs: 5
tx-frames: 0
tx-usecs-irq: 0
tx-frames-irq: 256
rx-usecs-low: 0
rx-frame-low: 0
tx-usecs-low: 0
tx-frame-low: 0
rx-usecs-high: 0
rx-frame-high: 0
tx-usecs-high: 0
tx-frame-high: 0
Based on patch by Kan Liang <kan.liang@...el.com>
Signed-off-by: Nicholas Nunley <nicholas.d.nunley@...el.com>
---
ethtool.8.in | 3 ++-
ethtool.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 65 insertions(+), 2 deletions(-)
diff --git a/ethtool.8.in b/ethtool.8.in
index b4e240e..2f788f3 100644
--- a/ethtool.8.in
+++ b/ethtool.8.in
@@ -1153,7 +1153,8 @@ Sets the specific queues which the sub command is applied to.
If queue_mask is not set, the sub command will be applied to all queues.
.TP
.B sub_command
-Sub command to apply. The supported sub commands include --show-coalesce.
+Sub command to apply. The supported sub commands include --show-coalesce and
+--coalesce.
.RE
.SH BUGS
Not supported (in part or whole) on all network drivers.
diff --git a/ethtool.c b/ethtool.c
index 1abf7c0..2296578 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -5274,7 +5274,7 @@ static const struct option {
{ "--set-fec", 1, do_sfec, "Set FEC settings",
" [ encoding auto|off|rs|baser [...]]\n"},
{ "-Q|--per-queue", 1, do_perqueue, "Apply per-queue command."
- "The supported sub commands include --show-coalesce",
+ "The supported sub commands include --show-coalesce, --coalesce",
" [queue_mask %x] SUB_COMMAND\n"},
{ "-h|--help", 0, show_usage, "Show this help" },
{ "--version", 0, do_version, "Show version number" },
@@ -5364,6 +5364,57 @@ get_per_queue_coalesce(struct cmd_context *ctx, __u32 *queue_mask, int n_queues)
return per_queue_opt;
}
+static void set_per_queue_coalesce(struct cmd_context *ctx,
+ struct ethtool_per_queue_op *per_queue_opt,
+ int n_queues)
+{
+ struct ethtool_coalesce ecoal;
+ DECLARE_COALESCE_OPTION_VARS();
+ struct cmdline_info cmdline_coalesce[] = COALESCE_CMDLINE_INFO(ecoal);
+ __u32 *queue_mask = per_queue_opt->queue_mask;
+ struct ethtool_coalesce *ecoal_q;
+ int gcoalesce_changed = 0;
+ int i, idx = 0;
+
+ parse_generic_cmdline(ctx, &gcoalesce_changed,
+ cmdline_coalesce, ARRAY_SIZE(cmdline_coalesce));
+
+ ecoal_q = (struct ethtool_coalesce *)(per_queue_opt + 1);
+ for (i = 0; i < __KERNEL_DIV_ROUND_UP(MAX_NUM_QUEUE, 32); i++) {
+ int queue = i * 32;
+ __u32 mask = queue_mask[i];
+
+ while (mask > 0) {
+ if (mask & 0x1) {
+ int changed = 0;
+
+ memcpy(&ecoal, ecoal_q + idx,
+ sizeof(struct ethtool_coalesce));
+ do_generic_set(cmdline_coalesce,
+ ARRAY_SIZE(cmdline_coalesce),
+ &changed);
+ if (!changed)
+ fprintf(stderr,
+ "Queue %d, no coalesce parameters changed\n",
+ queue);
+ memcpy(ecoal_q + idx, &ecoal,
+ sizeof(struct ethtool_coalesce));
+ idx++;
+ }
+ mask = mask >> 1;
+ queue++;
+ }
+ if (idx == n_queues)
+ break;
+ }
+
+ per_queue_opt->cmd = ETHTOOL_PERQUEUE;
+ per_queue_opt->sub_command = ETHTOOL_SCOALESCE;
+
+ if (send_ioctl(ctx, per_queue_opt))
+ perror("Cannot set device per queue parameters");
+}
+
static int do_perqueue(struct cmd_context *ctx)
{
struct ethtool_per_queue_op *per_queue_opt;
@@ -5426,6 +5477,17 @@ static int do_perqueue(struct cmd_context *ctx)
}
dump_per_queue_coalesce(per_queue_opt, queue_mask, n_queues);
free(per_queue_opt);
+ } else if (strstr(args[i].opts, "--coalesce") != NULL) {
+ ctx->argc--;
+ ctx->argp++;
+ per_queue_opt = get_per_queue_coalesce(ctx, queue_mask,
+ n_queues);
+ if (per_queue_opt == NULL) {
+ perror("Cannot get device per queue parameters");
+ return -EFAULT;
+ }
+ set_per_queue_coalesce(ctx, per_queue_opt, n_queues);
+ free(per_queue_opt);
} else {
perror("The subcommand is not supported yet");
return -EOPNOTSUPP;
--
2.20.1
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