svn commit: r314699 - in head/sys: dev/extres/clk kern sys
Emmanuel Vadot
manu at FreeBSD.org
Sun Mar 5 07:13:30 UTC 2017
Author: manu
Date: Sun Mar 5 07:13:29 2017
New Revision: 314699
URL: https://svnweb.freebsd.org/changeset/base/314699
Log:
Export a sysctl dev.<clkdom>.<unit>.clocks for each clock domain containing
all the clocks that they provide.
Each clocks are exported under the node 'clock.<clkname>' and have the following
children nodes :
- frequency
- parent (The selected parent, if any)
- parents (The list of parents, if any)
- childrens (The list of childrens, if any)
- enable_cnt (The enabled counter)
This give us the possibility to examine clocks at runtime and make graph of
the clock flow.
Reviewed by: mmel
MFC after: 2 month
Differential Revision: https://reviews.freebsd.org/D9833
Modified:
head/sys/dev/extres/clk/clk.c
head/sys/kern/kern_mib.c
head/sys/sys/sysctl.h
Modified: head/sys/dev/extres/clk/clk.c
==============================================================================
--- head/sys/dev/extres/clk/clk.c Sun Mar 5 05:17:36 2017 (r314698)
+++ head/sys/dev/extres/clk/clk.c Sun Mar 5 07:13:29 2017 (r314699)
@@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
#include <sys/mutex.h>
#include <sys/limits.h>
#include <sys/lock.h>
+#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/sx.h>
@@ -118,6 +119,8 @@ struct clknode {
/* Cached values. */
uint64_t freq; /* Actual frequency */
+
+ struct sysctl_ctx_list sysctl_ctx;
};
/*
@@ -175,6 +178,15 @@ SX_SYSINIT(clock_topology, &clk_topo_loc
static void clknode_adjust_parent(struct clknode *clknode, int idx);
+enum clknode_sysctl_type {
+ CLKNODE_SYSCTL_PARENT,
+ CLKNODE_SYSCTL_PARENTS_LIST,
+ CLKNODE_SYSCTL_CHILDREN_LIST,
+};
+
+static int clknode_sysctl(SYSCTL_HANDLER_ARGS);
+static int clkdom_sysctl(SYSCTL_HANDLER_ARGS);
+
/*
* Default clock methods for base class.
*/
@@ -382,6 +394,14 @@ clkdom_create(device_t dev)
clkdom->ofw_mapper = clknode_default_ofw_map;
#endif
+ SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
+ SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
+ OID_AUTO, "clocks",
+ CTLTYPE_STRING | CTLFLAG_RD,
+ clkdom, 0, clkdom_sysctl,
+ "A",
+ "Clock list for the domain");
+
return (clkdom);
}
@@ -503,6 +523,7 @@ clknode_create(struct clkdom * clkdom, c
const struct clknode_init_def *def)
{
struct clknode *clknode;
+ struct sysctl_oid *clknode_oid;
KASSERT(def->name != NULL, ("clock name is NULL"));
KASSERT(def->name[0] != '\0', ("clock name is empty"));
@@ -547,6 +568,42 @@ clknode_create(struct clkdom * clkdom, c
clknode->parent_idx = CLKNODE_IDX_NONE;
TAILQ_INIT(&clknode->children);
+ sysctl_ctx_init(&clknode->sysctl_ctx);
+ clknode_oid = SYSCTL_ADD_NODE(&clknode->sysctl_ctx,
+ SYSCTL_STATIC_CHILDREN(_clock),
+ OID_AUTO, clknode->name,
+ CTLFLAG_RD, 0, "A clock node");
+
+ SYSCTL_ADD_U64(&clknode->sysctl_ctx,
+ SYSCTL_CHILDREN(clknode_oid),
+ OID_AUTO, "frequency",
+ CTLFLAG_RD, &clknode->freq, 0, "The clock frequency");
+ SYSCTL_ADD_PROC(&clknode->sysctl_ctx,
+ SYSCTL_CHILDREN(clknode_oid),
+ OID_AUTO, "parent",
+ CTLTYPE_STRING | CTLFLAG_RD,
+ clknode, CLKNODE_SYSCTL_PARENT, clknode_sysctl,
+ "A",
+ "The clock parent");
+ SYSCTL_ADD_PROC(&clknode->sysctl_ctx,
+ SYSCTL_CHILDREN(clknode_oid),
+ OID_AUTO, "parents",
+ CTLTYPE_STRING | CTLFLAG_RD,
+ clknode, CLKNODE_SYSCTL_PARENTS_LIST, clknode_sysctl,
+ "A",
+ "The clock parents list");
+ SYSCTL_ADD_PROC(&clknode->sysctl_ctx,
+ SYSCTL_CHILDREN(clknode_oid),
+ OID_AUTO, "childrens",
+ CTLTYPE_STRING | CTLFLAG_RD,
+ clknode, CLKNODE_SYSCTL_CHILDREN_LIST, clknode_sysctl,
+ "A",
+ "The clock childrens list");
+ SYSCTL_ADD_INT(&clknode->sysctl_ctx,
+ SYSCTL_CHILDREN(clknode_oid),
+ OID_AUTO, "enable_cnt",
+ CTLFLAG_RD, &clknode->enable_cnt, 0, "The clock enable counter");
+
return (clknode);
}
@@ -1385,3 +1442,64 @@ clk_parse_ofw_clk_name(device_t dev, pha
return (0);
}
#endif
+
+static int
+clkdom_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ struct clkdom *clkdom = arg1;
+ struct clknode *clknode;
+ struct sbuf *sb;
+ int ret;
+
+ sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
+ if (sb == NULL)
+ return (ENOMEM);
+
+ CLK_TOPO_SLOCK();
+ TAILQ_FOREACH(clknode, &clkdom->clknode_list, clkdom_link) {
+ sbuf_printf(sb, "%s ", clknode->name);
+ }
+ CLK_TOPO_UNLOCK();
+
+ ret = sbuf_finish(sb);
+ sbuf_delete(sb);
+ return (ret);
+}
+
+static int
+clknode_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ struct clknode *clknode, *children;
+ enum clknode_sysctl_type type = arg2;
+ struct sbuf *sb;
+ const char **parent_names;
+ int ret, i;
+
+ clknode = arg1;
+ sb = sbuf_new_for_sysctl(NULL, NULL, 512, req);
+ if (sb == NULL)
+ return (ENOMEM);
+
+ CLK_TOPO_SLOCK();
+ switch (type) {
+ case CLKNODE_SYSCTL_PARENT:
+ if (clknode->parent)
+ sbuf_printf(sb, "%s", clknode->parent->name);
+ break;
+ case CLKNODE_SYSCTL_PARENTS_LIST:
+ parent_names = clknode_get_parent_names(clknode);
+ for (i = 0; i < clknode->parent_cnt; i++)
+ sbuf_printf(sb, "%s ", parent_names[i]);
+ break;
+ case CLKNODE_SYSCTL_CHILDREN_LIST:
+ TAILQ_FOREACH(children, &(clknode->children), sibling_link) {
+ sbuf_printf(sb, "%s ", children->name);
+ }
+ break;
+ }
+ CLK_TOPO_UNLOCK();
+
+ ret = sbuf_finish(sb);
+ sbuf_delete(sb);
+ return (ret);
+}
Modified: head/sys/kern/kern_mib.c
==============================================================================
--- head/sys/kern/kern_mib.c Sun Mar 5 05:17:36 2017 (r314698)
+++ head/sys/kern/kern_mib.c Sun Mar 5 07:13:29 2017 (r314699)
@@ -88,6 +88,11 @@ SYSCTL_ROOT_NODE(OID_AUTO, regression, C
"Regression test MIB");
#endif
+#ifdef EXT_RESOURCES
+SYSCTL_ROOT_NODE(OID_AUTO, clock, CTLFLAG_RW, 0,
+ "Clocks");
+#endif
+
SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
kern_ident, 0, "Kernel identifier");
Modified: head/sys/sys/sysctl.h
==============================================================================
--- head/sys/sys/sysctl.h Sun Mar 5 05:17:36 2017 (r314698)
+++ head/sys/sys/sysctl.h Sun Mar 5 07:13:29 2017 (r314699)
@@ -1004,6 +1004,9 @@ SYSCTL_DECL(_compat);
SYSCTL_DECL(_regression);
SYSCTL_DECL(_security);
SYSCTL_DECL(_security_bsd);
+#ifdef EXT_RESOURCES
+SYSCTL_DECL(_clock);
+#endif
extern char machine[];
extern char osrelease[];
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