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Date: Mon, 14 Mar 2016 02:30:07 -0700
From: kan.liang@...el.com
To: bwh@...nel.org
Cc: davem@...emloft.net, nicolas.dichtel@...nd.com,
ben@...adent.org.uk, jesse.brandeburg@...el.com,
andi@...stfloor.org, netdev@...r.kernel.org,
Kan Liang <kan.liang@...el.com>
Subject: [PATCH 5/5] ethtool: support per queue sub command --coalesce
From: Kan Liang <kan.liang@...el.com>
This patch uses a similar way as do_scoalesce to set coalesce per queue.
It reads the current settings, change them, and write them back to the
kernel for each masked queue.
Example:
$ sudo ./ethtool --set-perqueue-command eth5 queue_mask 0x1 --coalesce
rx-usecs 10 tx-usecs 5
$ sudo ./ethtool --set-perqueue-command 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
Signed-off-by: Kan Liang <kan.liang@...el.com>
---
ethtool.8.in | 2 +-
ethtool.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 58 insertions(+), 2 deletions(-)
diff --git a/ethtool.8.in b/ethtool.8.in
index 210ec8c..0e42180 100644
--- a/ethtool.8.in
+++ b/ethtool.8.in
@@ -937,7 +937,7 @@ 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
-Sets the sub command. The supported sub commands include --show-coalesce.
+Sets the sub command. 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 a966bf8..55ba26c 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -4222,7 +4222,7 @@ static const struct option {
" [ tx-lpi on|off ]\n"
" [ tx-timer %d ]\n"},
{ "--set-perqueue-command", 1, do_perqueue, "Set 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" },
@@ -4348,6 +4348,52 @@ get_per_queue_coalesce(struct cmd_context *ctx,
return per_queue_opt;
}
+static void __set_per_queue_coalesce(int queue)
+{
+ int changed = 0;
+
+ do_generic_set(cmdline_coalesce, ARRAY_SIZE(cmdline_coalesce),
+ &changed);
+
+ if (!changed)
+ fprintf(stderr, "Queue %d, no coalesce parameters changed\n", queue);
+}
+
+static void set_per_queue_coalesce(struct cmd_context *ctx,
+ struct ethtool_per_queue_op *per_queue_opt)
+{
+ __u32 *queue_mask = per_queue_opt->queue_mask;
+ char *addr = (char *)per_queue_opt + sizeof(*per_queue_opt);
+ int gcoalesce_changed = 0;
+ int i;
+
+ parse_generic_cmdline(ctx, &gcoalesce_changed,
+ cmdline_coalesce, ARRAY_SIZE(cmdline_coalesce));
+
+ 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) {
+ memcpy(&s_ecoal, addr, sizeof(struct ethtool_coalesce));
+ __set_per_queue_coalesce(queue);
+ memcpy(addr, &s_ecoal, sizeof(struct ethtool_coalesce));
+ addr += sizeof(struct ethtool_coalesce);
+ }
+ mask = mask >> 1;
+ queue++;
+ }
+ }
+
+ 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;
@@ -4397,6 +4443,16 @@ static int do_perqueue(struct cmd_context *ctx)
}
dump_per_queue_coalesce(per_queue_opt, queue_mask);
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);
+ free(per_queue_opt);
} else {
perror("The subcommand is not supported yet");
return -EOPNOTSUPP;
--
2.5.0
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