svn commit: r335223 - head/sys/dev/cxgbe

[Navdeep Parhar]

Author: np
Date: Fri Jun 15 18:04:44 2018
New Revision: 335223
URL: https://svnweb.freebsd.org/changeset/base/335223

Log:
  cxgbe(4): sysctls to display the local and intr CPUs for the adapter.
  
  The driver assumes the list can change (even though it does't right now)
  and queries it every time the sysctl runs.
  
  sysctl dev.<nexus>.<inst>.local_cpus
  sysctl dev.<nexus>.<inst>.intr_cpus
  
  sysctl dev.t6nex.0.local_cpus
  sysctl dev.t6nex.0.intr_cpus
  
  Sponsored by:	Chelsio Communications

Modified:
  head/sys/dev/cxgbe/t4_main.c

Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c	Fri Jun 15 17:44:21 2018	(r335222)
+++ head/sys/dev/cxgbe/t4_main.c	Fri Jun 15 18:04:44 2018	(r335223)
@@ -588,6 +588,7 @@ static int sysctl_tx_rate(SYSCTL_HANDLER_ARGS);
 static int sysctl_ulprx_la(SYSCTL_HANDLER_ARGS);
 static int sysctl_wcwr_stats(SYSCTL_HANDLER_ARGS);
 static int sysctl_tc_params(SYSCTL_HANDLER_ARGS);
+static int sysctl_cpus(SYSCTL_HANDLER_ARGS);
 #ifdef TCP_OFFLOAD
 static int sysctl_tls_rx_ports(SYSCTL_HANDLER_ARGS);
 static int sysctl_tp_tick(SYSCTL_HANDLER_ARGS);
@@ -5547,6 +5548,14 @@ t4_sysctls(struct adapter *sc)
 	SYSCTL_ADD_INT(ctx, children, OID_AUTO, "core_vdd", CTLFLAG_RD,
 	    &sc->params.core_vdd, 0, "core Vdd (in mV)");
 
+	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "local_cpus",
+	    CTLTYPE_STRING | CTLFLAG_RD, sc, LOCAL_CPUS,
+	    sysctl_cpus, "A", "local CPUs");
+
+	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "intr_cpus",
+	    CTLTYPE_STRING | CTLFLAG_RD, sc, INTR_CPUS,
+	    sysctl_cpus, "A", "preferred CPUs for interrupts");
+
 	/*
 	 * dev.t4nex.X.misc.  Marked CTLFLAG_SKIP to avoid information overload.
 	 */
@@ -8610,6 +8619,39 @@ done:
 	sbuf_delete(sb);
 
 	return (rc);
+}
+
+static int
+sysctl_cpus(SYSCTL_HANDLER_ARGS)
+{
+	struct adapter *sc = arg1;
+	enum cpu_sets op = arg2;
+	cpuset_t cpuset;
+	struct sbuf *sb;
+	int i, rc;
+
+	MPASS(op == LOCAL_CPUS || op == INTR_CPUS);
+
+	CPU_ZERO(&cpuset);
+	rc = bus_get_cpus(sc->dev, op, sizeof(cpuset), &cpuset);
+	if (rc != 0)
+		return (rc);
+
+	rc = sysctl_wire_old_buffer(req, 0);
+	if (rc != 0)
+		return (rc);
+
+	sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
+	if (sb == NULL)
+		return (ENOMEM);
+
+	CPU_FOREACH(i)
+		sbuf_printf(sb, "%d ", i);
+	rc = sbuf_finish(sb);
+	sbuf_delete(sb);
+
+	return (rc);
+
 }
 
 #ifdef TCP_OFFLOAD