From mboxrd@z Thu Jan 1 00:00:00 1970 From: Georgi Djakov Subject: [PATCH v4 3/7] interconnect: Add debugfs support Date: Fri, 9 Mar 2018 23:09:54 +0200 Message-ID: <20180309210958.16672-4-georgi.djakov@linaro.org> References: <20180309210958.16672-1-georgi.djakov@linaro.org> Return-path: In-Reply-To: <20180309210958.16672-1-georgi.djakov@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-pm@vger.kernel.org, gregkh@linuxfoundation.org Cc: 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, davidai@quicinc.com, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, georgi.djakov@linaro.org List-Id: linux-arm-msm@vger.kernel.org Add a functionality to provide information about the current constraints per each node and provider. Signed-off-by: Georgi Djakov --- drivers/interconnect/core.c | 70 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index 6306e258b9b9..a06f752a6aaa 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -6,6 +6,7 @@ * Author: Georgi Djakov */ +#include #include #include #include @@ -15,11 +16,13 @@ #include #include #include +#include static DEFINE_IDR(icc_idr); static LIST_HEAD(icc_provider_list); static DEFINE_MUTEX(icc_provider_list_mutex); static DEFINE_MUTEX(icc_path_mutex); +static struct dentry *icc_debugfs_dir; /** * struct icc_req - constraints that are attached to each node @@ -46,6 +49,73 @@ struct icc_path { struct icc_req reqs[0]; }; +#ifdef CONFIG_DEBUG_FS + +static void icc_summary_show_one(struct seq_file *s, struct icc_node *n) +{ + if (!n) + return; + + seq_printf(s, "%-30s %12d %12d\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_provider_list_mutex); + + list_for_each_entry(provider, &icc_provider_list, provider_list) { + struct icc_node *n; + + mutex_lock(&provider->lock); + list_for_each_entry(n, &provider->nodes, node_list) { + icc_summary_show_one(s, n); + } + mutex_unlock(&provider->lock); + } + + mutex_unlock(&icc_provider_list_mutex); + + 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 int __init icc_debugfs_init(void) +{ + struct dentry *file; + + icc_debugfs_dir = debugfs_create_dir("interconnect", NULL); + if (!icc_debugfs_dir) { + pr_err("interconnect: error creating debugfs directory\n"); + return -ENODEV; + } + + file = debugfs_create_file("interconnect_summary", 0444, + icc_debugfs_dir, NULL, &icc_summary_fops); + if (!file) + return -ENODEV; + + return 0; +} +late_initcall(icc_debugfs_init); +#endif + static struct icc_node *node_find(const int id) { struct icc_node *node;