From: Georgi Djakov <georgi.djakov@linaro.org>
To: linux-pm@vger.kernel.org
Cc: gregkh@linuxfoundation.org, rjw@rjwysocki.net,
robh+dt@kernel.org, mturquette@baylibre.com,
khilman@baylibre.com, vincent.guittot@linaro.org,
skannan@codeaurora.org, bjorn.andersson@linaro.org,
amit.kucheria@linaro.org, seansw@qti.qualcomm.com,
daidavid1@codeaurora.org, evgreen@chromium.org,
mark.rutland@arm.com, lorenzo.pieralisi@arm.com,
abailon@baylibre.com, maxime.ripard@bootlin.com, arnd@arndb.de,
thierry.reding@gmail.com, ksitaraman@nvidia.com,
sanjayc@nvidia.com, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org,
georgi.djakov@linaro.org
Subject: [PATCH v10 4/7] interconnect: Add debugfs support
Date: Tue, 27 Nov 2018 20:03:46 +0200 [thread overview]
Message-ID: <20181127180349.29997-5-georgi.djakov@linaro.org> (raw)
In-Reply-To: <20181127180349.29997-1-georgi.djakov@linaro.org>
Add a functionality to provide information about the current constraints
per each node and provider.
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Reviewed-by: Evan Green <evgreen@chromium.org>
---
drivers/interconnect/core.c | 71 +++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index ebc42ef9fa46..efe39e8934cc 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -6,6 +6,7 @@
* Author: Georgi Djakov <georgi.djakov@linaro.org>
*/
+#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/idr.h>
#include <linux/init.h>
@@ -17,10 +18,12 @@
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/overflow.h>
+#include <linux/uaccess.h>
static DEFINE_IDR(icc_idr);
static LIST_HEAD(icc_providers);
static DEFINE_MUTEX(icc_lock);
+static struct dentry *icc_debugfs_dir;
/**
* struct icc_req - constraints that are attached to each node
@@ -48,6 +51,59 @@ struct icc_path {
struct icc_req reqs[];
};
+static void icc_summary_show_one(struct seq_file *s, struct icc_node *n)
+{
+ if (!n)
+ return;
+
+ seq_printf(s, "%-30s %12u %12u\n",
+ n->name, n->avg_bw, n->peak_bw);
+}
+
+static int icc_summary_show(struct seq_file *s, void *data)
+{
+ struct icc_provider *provider;
+
+ seq_puts(s, " node avg peak\n");
+ seq_puts(s, "--------------------------------------------------------\n");
+
+ mutex_lock(&icc_lock);
+
+ list_for_each_entry(provider, &icc_providers, provider_list) {
+ struct icc_node *n;
+
+ list_for_each_entry(n, &provider->nodes, node_list) {
+ struct icc_req *r;
+
+ icc_summary_show_one(s, n);
+ hlist_for_each_entry(r, &n->req_list, req_node) {
+ if (!r->dev)
+ continue;
+
+ seq_printf(s, " %-26s %12u %12u\n",
+ dev_name(r->dev), r->avg_bw,
+ r->peak_bw);
+ }
+ }
+ }
+
+ mutex_unlock(&icc_lock);
+
+ return 0;
+}
+
+static int icc_summary_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, icc_summary_show, inode->i_private);
+}
+
+static const struct file_operations icc_summary_fops = {
+ .open = icc_summary_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static struct icc_node *node_find(const int id)
{
return idr_find(&icc_idr, id);
@@ -720,6 +776,21 @@ int icc_provider_del(struct icc_provider *provider)
}
EXPORT_SYMBOL_GPL(icc_provider_del);
+static int __init icc_init(void)
+{
+ icc_debugfs_dir = debugfs_create_dir("interconnect", NULL);
+ debugfs_create_file("interconnect_summary", 0444,
+ icc_debugfs_dir, NULL, &icc_summary_fops);
+ return 0;
+}
+
+static void __exit icc_exit(void)
+{
+ debugfs_remove_recursive(icc_debugfs_dir);
+}
+module_init(icc_init);
+module_exit(icc_exit);
+
MODULE_AUTHOR("Georgi Djakov <georgi.djakov@linaro.org");
MODULE_DESCRIPTION("Interconnect Driver Core");
MODULE_LICENSE("GPL v2");
next prev parent reply other threads:[~2018-11-27 18:04 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 18:03 [PATCH v10 0/8] Introduce on-chip interconnect API Georgi Djakov
2018-11-27 18:03 ` [PATCH v10 1/7] interconnect: Add generic " Georgi Djakov
2018-11-27 18:35 ` Joe Perches
2018-11-28 18:18 ` Georgi Djakov
2018-12-01 0:38 ` Evan Green
2018-12-05 15:57 ` Georgi Djakov
2018-12-05 16:16 ` Rob Herring
2018-12-07 15:24 ` Georgi Djakov
2018-11-27 18:03 ` [PATCH v10 2/7] dt-bindings: Introduce interconnect binding Georgi Djakov
2018-12-01 0:38 ` Evan Green
2018-11-27 18:03 ` [PATCH v10 3/7] interconnect: Allow endpoints translation via DT Georgi Djakov
2018-12-01 0:38 ` Evan Green
2018-12-05 15:59 ` Georgi Djakov
2018-11-27 18:03 ` Georgi Djakov [this message]
2018-11-27 18:03 ` [PATCH v10 5/7] interconnect: qcom: Add sdm845 interconnect provider driver Georgi Djakov
2018-12-01 0:39 ` Evan Green
2018-12-05 16:00 ` Georgi Djakov
2018-12-06 21:53 ` David Dai
2018-11-27 18:03 ` [PATCH v10 6/7] arm64: dts: sdm845: Add interconnect provider DT nodes Georgi Djakov
2018-12-01 0:39 ` Evan Green
2018-12-05 16:01 ` Georgi Djakov
2018-11-27 18:03 ` [PATCH v10 7/7] MAINTAINERS: add a maintainer for the interconnect API Georgi Djakov
2018-12-05 20:41 ` [PATCH v10 0/8] Introduce on-chip " Evan Green
2018-12-06 14:55 ` Greg KH
2018-12-07 10:06 ` Georgi Djakov
2018-12-10 9:04 ` Rafael J. Wysocki
2018-12-10 10:18 ` Georgi Djakov
2018-12-10 11:00 ` Rafael J. Wysocki
2018-12-10 14:50 ` Georgi Djakov
2018-12-11 6:58 ` Greg Kroah-Hartman
2018-12-17 11:17 ` Georgi Djakov
2019-01-10 14:19 ` Georgi Djakov
2019-01-10 16:29 ` Greg Kroah-Hartman
2019-01-10 16:34 ` Georgi Djakov
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