The configuration knobs that can be set are:
- enabling/disabling frame preemption per-device;
- setting the mask of preemptible queues;
- configuring the minimum fragment size;
The values that can be retrieved from the hardware are:
- if frame preemption is supported;
- if frame preemption is active;
- which queues can be set as preemptible;
- which queues are set as preemptible;
- the current minimum fragment size;
Signed-off-by: Vinicius Costa Gomes <vinicius.go...@intel.com>
---
ethtool.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
diff --git a/ethtool.c b/ethtool.c
index 900880a..4c69d1c 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -1573,6 +1573,28 @@ static void dump_fec(u32 fec)
fprintf(stdout, " LLRS");
}
+static void dump_fpcmd(struct ethtool_fp *fpcmd)
+{
+ fprintf(stdout, " support: ");
+ if (fpcmd->fp_supported)
+ fprintf(stdout, "supported\n");
+ else
+ fprintf(stdout, "not supported\n");
+
+ fprintf(stdout, " status: ");
+ if (fpcmd->fp_enabled)
+ fprintf(stdout, "enabled\n");
+ else
+ fprintf(stdout, "disabled\n");
+
+ fprintf(stdout, " supported queues: %#x\n",
+ fpcmd->supported_queues_mask);
+ fprintf(stdout, " preemptible queues: %#x\n",
+ fpcmd->preemptible_queues_mask);
+ fprintf(stdout, " minimum fragment size: %d\n",
+ fpcmd->min_frag_size);
+}
+
#define N_SOTS 7
static char *so_timestamping_labels[N_SOTS] = {
@@ -4731,6 +4753,63 @@ static int do_seee(struct cmd_context *ctx)
return 0;
}
+static int do_get_preempt(struct cmd_context *ctx)
+{
+ struct ethtool_fp fpcmd;
+
+ if (ctx->argc != 0)
+ exit_bad_args();
+
+ fpcmd.cmd = ETHTOOL_GFP;
+ if (send_ioctl(ctx, &fpcmd)) {
+ perror("Cannot get frame preemption settings");
+ return 1;
+ }
+
+ fprintf(stdout, "Frame preemption Settings for %s:\n", ctx->devname);
+ dump_fpcmd(&fpcmd);
+
+ return 0;
+}
+
+static int do_set_preempt(struct cmd_context *ctx)
+{
+ int fp_c = -1, preempt_queues_mask_c = -1, min_frag_c = -1;
+ int change = -1;
+ struct ethtool_fp fpcmd;
+ struct cmdline_info cmdline_fp[] = {
+ { "fp", CMDL_BOOL, &fp_c, &fpcmd.fp_enabled },
+ { "preemptible-queues-mask", CMDL_U32, &preempt_queues_mask_c,
+ &fpcmd.preemptible_queues_mask },
+ { "min-frag-size", CMDL_U32, &min_frag_c,
+ &fpcmd.min_frag_size },
+ };
+
+ if (ctx->argc == 0)
+ exit_bad_args();
+
+ parse_generic_cmdline(ctx, &change, cmdline_fp,
+ ARRAY_SIZE(cmdline_fp));
+
+ fpcmd.cmd = ETHTOOL_GFP;
+ if (send_ioctl(ctx, &fpcmd)) {
+ perror("Cannot get frame preemption settings");
+ return 1;
+ }
+
+ do_generic_set(cmdline_fp, ARRAY_SIZE(cmdline_fp), &change);
+
+ if (change) {
+ fpcmd.cmd = ETHTOOL_SFP;
+ if (send_ioctl(ctx, &fpcmd)) {
+ perror("Cannot set frame preemption settings");
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
static int do_get_phy_tunable(struct cmd_context *ctx)
{
int argc = ctx->argc;
@@ -5505,6 +5584,19 @@ static const struct option args[] = {
.help = "Set FEC settings",
.xhelp = " [ encoding auto|off|rs|baser|llrs
[...]]\n"
},
+ {
+ .opts = "--show-frame-preemption",
+ .func = do_get_preempt,
+ .help = "Show Frame Preemption settings",
+ },
+ {
+ .opts = "--set-frame-preemption",
+ .func = do_set_preempt,
+ .help = "Set Frame Preemption settings",
+ .xhelp = " [ fp on|off ]\n"
+ " [ preemptible-queues-mask %x ]\n"
+ " [ min-frag-size %d ]\n",
+ },
{
.opts = "-Q|--per-queue",
.func = do_perqueue,
--
2.26.2
