From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1520629806; cv=none; d=google.com; s=arc-20160816; b=v3kDBtHY0NiFcvWlEjAAqExlX8Cga2LgewWEdun/RfJ3DpQdkP6hp0B0DnC6Llmi5t 6iAj9jMzYwzj8doW6uwGupOjg6A9V2rfgXWjlt4DgqbvlB8LXOvmwkfBBGL6ghrLxlUF vwJwEU7DaZx/fDlytzCPKxUuIwWC/8PYhWzh+fEYNBGbHuIlZaJiSVKR3a/qfAAvnLnV C8/J7x0JNbyiA3+vPXPkSPzHpV5hDNg8CJxOfYlnICCSpkKntNo8GqMeVLTbZhAIy2Bm zFUfEZn1rnl1hgBc3hkNXmE5q61Vq0dBDMQjLOe2Z9F58uURWjKXQrvsW9Eqt7JGCS6f gaBg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=7dJ61Js48E3Ds72/6TrlMw7o9MrSnzRN7XqpAPjyplI=; b=zvvQEVTMmkJ9UaMWAJgrSyOoirb0E5HB9FlreHDYiiiLH4lt/Gj0yuY1gE9GLvzhBz 5Zku9kYYfnSzSsnjLEiRHHE4OZe3ZhxgDbpvDuKhbvMIPm/PO+B/CNXA6fSh4nM1S+Nj TU6QIs9Nadu22B+86NjPj6qUkmWT2oCiMg0YGBpV+iqNxUZAY42iTTTFQSSd5hqFHj8m cCBrkDqr1VlUhnJA7LXheIk3d16r5ZNmsaCw3Rb0CcwypvmwTwz7d5YycvKzcUG1UMhl 5G+6ywuKPqQSyKR8VdeO/HotNBQXNTnkC3xeLB/uXiUE6cspG356QMsfKGoUazEQaj1D QRRA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=ByBvWMEv; spf=pass (google.com: domain of georgi.djakov@linaro.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=georgi.djakov@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=ByBvWMEv; spf=pass (google.com: domain of georgi.djakov@linaro.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=georgi.djakov@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org X-Google-Smtp-Source: AG47ELuC3qQglFr1vVFC6H4sMHfFc+1EHFZPCJ62XCWsL/U2shuyKr/LhtF9GPEEQPHMn+45ho9EIQ== From: Georgi Djakov 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 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> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180309210958.16672-1-georgi.djakov@linaro.org> References: <20180309210958.16672-1-georgi.djakov@linaro.org> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1594495920063495785?= X-GMAIL-MSGID: =?utf-8?q?1594495920063495785?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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;