From patchwork Mon Jan 13 21:31:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Leach X-Patchwork-Id: 11330927 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D8A9B13BD for ; Mon, 13 Jan 2020 21:32:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AC2562187F for ; Mon, 13 Jan 2020 21:32:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="fnaJFQKE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726488AbgAMVcU (ORCPT ); Mon, 13 Jan 2020 16:32:20 -0500 Received: from mail-wm1-f45.google.com ([209.85.128.45]:52715 "EHLO mail-wm1-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728820AbgAMVcS (ORCPT ); Mon, 13 Jan 2020 16:32:18 -0500 Received: by mail-wm1-f45.google.com with SMTP id p9so11490704wmc.2 for ; Mon, 13 Jan 2020 13:32:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Dz/cJdELPmJrnmCn4UxPzGvH13yuPY2C0/ICULwwhGw=; b=fnaJFQKE9p0MMFahrUN8NrmFTioUNdj6yXUOu19AonNVDcyn3K0bw8WIwH/YyaCVVb 3NcUkDdxUY3Lef1XbIE0SQIC/cWC0UDW7zyhf0YluATZLT4b93OE3rqeFPnJH7Vn3Ull 4nJjvDlYH+eVSiGX/BW2Uz/t4il3cZrYCOCmiQJJzzzwrjLVOYO+F8NpVC97nQ3glKP2 l6RLbVsNTSrWZM7Zz0sYj/HW3ESDKgeuVHfWimyloiy6GaXMf2A0R1j+PLJMXQYZT8nK OjH2G0WGEb95bwexFwayvCOrxtWCCcWjSEI9nrsTQU0WjJEJzx1rtNb7Di+W7DW9O7OC wqEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Dz/cJdELPmJrnmCn4UxPzGvH13yuPY2C0/ICULwwhGw=; b=XA3iSC38bj/okBUOvNfnlyFxhCV0p9lRL6XoODURqxn23UVOFSsASodH1kODNq7tnl ryDWHi5IKoqF+8C+42t43epK95D+soQ7eJ7Zi8vYmSTauw4jMLvJZF3eXhG3vkN8UWte YuH6H8KtaDhxjqZvZSWVY6F3P9uU+QelOalKX/rWWmkn8nSEMY79nMLH2EZPj6FZ79Uh a9quHmkGFUk26DSaPWNPRMcOD7f0RmhaA6GZSWBeTnhkhbDVaUAjY5fVNykrK4cHHPyW i1SgMbIM57imrwmVfRLznY26pwUERn/9GXUfaAZPZqAlxLiaJN48hNOcqZwiirFRwhni IadQ== X-Gm-Message-State: APjAAAXjTpL8h80VKNoTnxzgGf3R5m7LrUS8q8Bw+DMLLJRhGDxqSn4F P8Yq6hN4ZK3SE33q00vMRAvQiQ== X-Google-Smtp-Source: APXvYqwxdJquLA7lEIgqeWpfVS3OUFkeOAglwXVyx2+ShHT8jhyL/CUfuHb0bcmokPE+iIutkEr57g== X-Received: by 2002:a7b:c183:: with SMTP id y3mr22197242wmi.45.1578951134173; Mon, 13 Jan 2020 13:32:14 -0800 (PST) Received: from linaro.org ([2a00:23c5:6815:3901:a1cf:b00b:5683:ed40]) by smtp.gmail.com with ESMTPSA id j12sm16725120wrt.55.2020.01.13.13.32.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jan 2020 13:32:13 -0800 (PST) From: Mike Leach To: mike.leach@linaro.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, coresight@lists.linaro.org, linux-doc@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org, mathieu.poirier@linaro.org, suzuki.poulose@arm.com, robh+dt@kernel.org, maxime@cerno.tech, liviu.dudau@arm.com, sudeep.holla@arm.com, lorenzo.pieralisi@arm.com, agross@kernel.org, corbet@lwn.net Subject: [PATCH v8 09/15] coresight: cti: Add connection information to sysfs Date: Mon, 13 Jan 2020 21:31:43 +0000 Message-Id: <20200113213149.25599-10-mike.leach@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200113213149.25599-1-mike.leach@linaro.org> References: <20200113213149.25599-1-mike.leach@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Dynamically adds sysfs attributes for all connections defined in the CTI. Each connection has a triggers sub-directory with name, in_signals, in_types, out_signals and out_types as read-only parameters in the directory. in_ or out_ parameters may be omitted if there are no in or out signals for the connection. Additionally each device has a nr_cons in the connections sub-directory. This allows clients to explore the connection and trigger signal details without needing to refer to device tree or specification of the device. Standardised type information is provided for certain common functions - e.g. snk_full for a trigger from a sink indicating full. Otherwise type defaults to genio. Signed-off-by: Mike Leach Reviewed-by: Mathieu Poirier Reviewed-by: Suzuki K Poulose --- .../hwtracing/coresight/coresight-cti-sysfs.c | 333 +++++++++++++++++- drivers/hwtracing/coresight/coresight-cti.c | 10 +- drivers/hwtracing/coresight/coresight-cti.h | 8 + 3 files changed, 348 insertions(+), 3 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-cti-sysfs.c b/drivers/hwtracing/coresight/coresight-cti-sysfs.c index 8af1986ed69f..db3395c46f51 100644 --- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c @@ -8,6 +8,67 @@ #include "coresight-cti.h" +/* + * Declare the number of static declared attribute groups + * Value includes groups + NULL value at end of table. + */ +#define CORESIGHT_CTI_STATIC_GROUPS_MAX 5 + +/* + * List of trigger signal type names. Match the constants declared in + * include\dt-bindings\arm\coresight-cti-dt.h + */ +static const char * const sig_type_names[] = { + "genio", /* GEN_IO */ + "intreq", /* GEN_INTREQ */ + "intack", /* GEN_INTACK */ + "haltreq", /* GEN_HALTREQ */ + "restartreq", /* GEN_RESTARTREQ */ + "pe_edbgreq", /* PE_EDBGREQ */ + "pe_dbgrestart",/* PE_DBGRESTART */ + "pe_ctiirq", /* PE_CTIIRQ */ + "pe_pmuirq", /* PE_PMUIRQ */ + "pe_dbgtrigger",/* PE_DBGTRIGGER */ + "etm_extout", /* ETM_EXTOUT */ + "etm_extin", /* ETM_EXTIN */ + "snk_full", /* SNK_FULL */ + "snk_acqcomp", /* SNK_ACQCOMP */ + "snk_flushcomp",/* SNK_FLUSHCOMP */ + "snk_flushin", /* SNK_FLUSHIN */ + "snk_trigin", /* SNK_TRIGIN */ + "stm_asyncout", /* STM_ASYNCOUT */ + "stm_tout_spte",/* STM_TOUT_SPTE */ + "stm_tout_sw", /* STM_TOUT_SW */ + "stm_tout_hete",/* STM_TOUT_HETE */ + "stm_hwevent", /* STM_HWEVENT */ + "ela_tstart", /* ELA_TSTART */ + "ela_tstop", /* ELA_TSTOP */ + "ela_dbgreq", /* ELA_DBGREQ */ +}; + +/* Show function pointer used in the connections dynamic declared attributes*/ +typedef ssize_t (*p_show_fn)(struct device *dev, struct device_attribute *attr, + char *buf); + +/* Connection attribute types */ +enum cti_conn_attr_type { + CTI_CON_ATTR_NAME, + CTI_CON_ATTR_TRIGIN_SIG, + CTI_CON_ATTR_TRIGOUT_SIG, + CTI_CON_ATTR_TRIGIN_TYPES, + CTI_CON_ATTR_TRIGOUT_TYPES, + CTI_CON_ATTR_MAX, +}; + +/* Names for the connection attributes */ +static const char * const con_attr_names[CTI_CON_ATTR_MAX] = { + "name", + "in_signals", + "out_signals", + "in_types", + "out_types", +}; + /* basic attributes */ static ssize_t enable_show(struct device *dev, struct device_attribute *attr, @@ -66,10 +127,21 @@ static ssize_t ctmid_show(struct device *dev, } static DEVICE_ATTR_RO(ctmid); +static ssize_t nr_trigger_cons_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); + + return scnprintf(buf, PAGE_SIZE, "%d\n", drvdata->ctidev.nr_trig_con); +} +static DEVICE_ATTR_RO(nr_trigger_cons); + /* attribute and group sysfs tables. */ static struct attribute *coresight_cti_attrs[] = { &dev_attr_enable.attr, &dev_attr_ctmid.attr, + &dev_attr_nr_trigger_cons.attr, NULL, }; @@ -817,7 +889,263 @@ static struct attribute *coresight_cti_channel_attrs[] = { NULL, }; -/* sysfs groups */ +/* Create the connections trigger groups and attrs dynamically */ +/* + * Each connection has dynamic group triggers + name, trigin/out sigs/types + * attributes, + each device has static nr_trigger_cons giving the number + * of groups. e.g. in sysfs:- + * /cti_/triggers0 + * /cti_/triggers1 + * /cti_/nr_trigger_cons + * where nr_trigger_cons = 2 + */ +static ssize_t con_name_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct dev_ext_attribute *ext_attr = + container_of(attr, struct dev_ext_attribute, attr); + struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; + + return scnprintf(buf, PAGE_SIZE, "%s\n", con->con_dev_name); +} + +static ssize_t trigin_sig_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct dev_ext_attribute *ext_attr = + container_of(attr, struct dev_ext_attribute, attr); + struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; + struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct cti_config *cfg = &drvdata->config; + unsigned long mask = con->con_in->used_mask; + + return bitmap_print_to_pagebuf(true, buf, &mask, cfg->nr_trig_max); +} + +static ssize_t trigout_sig_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct dev_ext_attribute *ext_attr = + container_of(attr, struct dev_ext_attribute, attr); + struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; + struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); + struct cti_config *cfg = &drvdata->config; + unsigned long mask = con->con_out->used_mask; + + return bitmap_print_to_pagebuf(true, buf, &mask, cfg->nr_trig_max); +} + +/* convert a sig type id to a name */ +static const char * +cti_sig_type_name(struct cti_trig_con *con, int used_count, bool in) +{ + int idx = 0; + struct cti_trig_grp *grp = in ? con->con_in : con->con_out; + + if (grp->sig_types) { + if (used_count < grp->nr_sigs) + idx = grp->sig_types[used_count]; + } + return sig_type_names[idx]; +} + +static ssize_t trigin_type_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct dev_ext_attribute *ext_attr = + container_of(attr, struct dev_ext_attribute, attr); + struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; + int sig_idx, used = 0, b_sz = PAGE_SIZE; + const char *name; + + for (sig_idx = 0; sig_idx < con->con_in->nr_sigs; sig_idx++) { + name = cti_sig_type_name(con, sig_idx, true); + used += scnprintf(buf + used, b_sz - used, "%s ", name); + } + used += scnprintf(buf + used, b_sz - used, "\n"); + return used; +} + +static ssize_t trigout_type_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct dev_ext_attribute *ext_attr = + container_of(attr, struct dev_ext_attribute, attr); + struct cti_trig_con *con = (struct cti_trig_con *)ext_attr->var; + int sig_idx, used = 0, b_sz = PAGE_SIZE; + const char *name; + + for (sig_idx = 0; sig_idx < con->con_out->nr_sigs; sig_idx++) { + name = cti_sig_type_name(con, sig_idx, false); + used += scnprintf(buf + used, b_sz - used, "%s ", name); + } + used += scnprintf(buf + used, b_sz - used, "\n"); + return used; +} + +/* + * Array of show function names declared above to allow selection + * for the connection attributes + */ +static p_show_fn show_fns[CTI_CON_ATTR_MAX] = { + con_name_show, + trigin_sig_show, + trigout_sig_show, + trigin_type_show, + trigout_type_show, +}; + +static int cti_create_con_sysfs_attr(struct device *dev, + struct cti_trig_con *con, + enum cti_conn_attr_type attr_type, + int attr_idx) +{ + struct dev_ext_attribute *eattr = 0; + char *name = 0; + + eattr = devm_kzalloc(dev, sizeof(struct dev_ext_attribute), + GFP_KERNEL); + if (eattr) { + name = devm_kstrdup(dev, con_attr_names[attr_type], + GFP_KERNEL); + if (name) { + /* fill out the underlying attribute struct */ + eattr->attr.attr.name = name; + eattr->attr.attr.mode = 0444; + + /* now the device_attribute struct */ + eattr->attr.show = show_fns[attr_type]; + } else { + return -ENOMEM; + } + } else { + return -ENOMEM; + } + eattr->var = con; + con->con_attrs[attr_idx] = &eattr->attr.attr; + return 0; +} + +static struct attribute_group * +cti_create_con_sysfs_group(struct device *dev, struct cti_device *ctidev, + int con_idx, struct cti_trig_con *tc) +{ + struct attribute_group *group = NULL; + int grp_idx; + + group = devm_kzalloc(dev, sizeof(struct attribute_group), GFP_KERNEL); + if (!group) + return NULL; + + group->name = devm_kasprintf(dev, GFP_KERNEL, "triggers%d", con_idx); + if (!group->name) + return NULL; + + grp_idx = con_idx + CORESIGHT_CTI_STATIC_GROUPS_MAX - 1; + ctidev->con_groups[grp_idx] = group; + tc->attr_group = group; + return group; +} + +/* create a triggers connection group and the attributes for that group */ +static int cti_create_con_attr_set(struct device *dev, int con_idx, + struct cti_device *ctidev, + struct cti_trig_con *tc) +{ + struct attribute_group *attr_group = NULL; + int attr_idx = 0; + int err = -ENOMEM; + + attr_group = cti_create_con_sysfs_group(dev, ctidev, con_idx, tc); + if (!attr_group) + return -ENOMEM; + + /* allocate NULL terminated array of attributes */ + tc->con_attrs = devm_kcalloc(dev, CTI_CON_ATTR_MAX + 1, + sizeof(struct attribute *), GFP_KERNEL); + if (!tc->con_attrs) + return -ENOMEM; + + err = cti_create_con_sysfs_attr(dev, tc, CTI_CON_ATTR_NAME, + attr_idx++); + if (err) + return err; + + if (tc->con_in->nr_sigs > 0) { + err = cti_create_con_sysfs_attr(dev, tc, + CTI_CON_ATTR_TRIGIN_SIG, + attr_idx++); + if (err) + return err; + + err = cti_create_con_sysfs_attr(dev, tc, + CTI_CON_ATTR_TRIGIN_TYPES, + attr_idx++); + if (err) + return err; + } + + if (tc->con_out->nr_sigs > 0) { + err = cti_create_con_sysfs_attr(dev, tc, + CTI_CON_ATTR_TRIGOUT_SIG, + attr_idx++); + if (err) + return err; + + err = cti_create_con_sysfs_attr(dev, tc, + CTI_CON_ATTR_TRIGOUT_TYPES, + attr_idx++); + if (err) + return err; + } + attr_group->attrs = tc->con_attrs; + return 0; +} + +/* create the array of group pointers for the CTI sysfs groups */ +int cti_create_cons_groups(struct device *dev, struct cti_device *ctidev) +{ + int nr_groups; + + /* nr groups - dynamic + static + NULL terminator */ + nr_groups = ctidev->nr_trig_con + CORESIGHT_CTI_STATIC_GROUPS_MAX; + ctidev->con_groups = devm_kcalloc(dev, nr_groups, + sizeof(struct attribute_group *), + GFP_KERNEL); + if (!ctidev->con_groups) + return -ENOMEM; + return 0; +} + +int cti_create_cons_sysfs(struct device *dev, struct cti_drvdata *drvdata) +{ + struct cti_device *ctidev = &drvdata->ctidev; + int err = 0, con_idx = 0, i; + struct cti_trig_con *tc = NULL; + + err = cti_create_cons_groups(dev, ctidev); + if (err) + return err; + + /* populate first locations with the static set of groups */ + for (i = 0; i < (CORESIGHT_CTI_STATIC_GROUPS_MAX - 1); i++) + ctidev->con_groups[i] = coresight_cti_groups[i]; + + /* add dynamic set for each connection */ + list_for_each_entry(tc, &ctidev->trig_cons, node) { + err = cti_create_con_attr_set(dev, con_idx++, ctidev, tc); + if (err) + break; + } + return err; +} + +/* attribute and group sysfs tables. */ static const struct attribute_group coresight_cti_group = { .attrs = coresight_cti_attrs, }; @@ -837,7 +1165,8 @@ static const struct attribute_group coresight_cti_channels_group = { .name = "channels", }; -const struct attribute_group *coresight_cti_groups[] = { +const struct attribute_group * +coresight_cti_groups[CORESIGHT_CTI_STATIC_GROUPS_MAX] = { &coresight_cti_group, &coresight_cti_mgmt_group, &coresight_cti_regs_group, diff --git a/drivers/hwtracing/coresight/coresight-cti.c b/drivers/hwtracing/coresight/coresight-cti.c index 2be1b310e854..9d27dea1625f 100644 --- a/drivers/hwtracing/coresight/coresight-cti.c +++ b/drivers/hwtracing/coresight/coresight-cti.c @@ -676,12 +676,20 @@ static int cti_probe(struct amba_device *adev, const struct amba_id *id) goto err_out; } + /* create dynamic attributes for connections */ + ret = cti_create_cons_sysfs(dev, drvdata); + if (ret) { + dev_err(dev, "%s: create dynamic sysfs entries failed\n", + cti_desc.name); + goto err_out; + } + /* set up coresight component description */ cti_desc.pdata = pdata; cti_desc.type = CORESIGHT_DEV_TYPE_ECT; cti_desc.subtype.ect_subtype = CORESIGHT_DEV_SUBTYPE_ECT_CTI; cti_desc.ops = &cti_ops; - cti_desc.groups = coresight_cti_groups; + cti_desc.groups = drvdata->ctidev.con_groups; cti_desc.dev = dev; drvdata->csdev = coresight_register(&cti_desc); if (IS_ERR(drvdata->csdev)) { diff --git a/drivers/hwtracing/coresight/coresight-cti.h b/drivers/hwtracing/coresight/coresight-cti.h index 578d7e9ac67e..14d1b8933c18 100644 --- a/drivers/hwtracing/coresight/coresight-cti.h +++ b/drivers/hwtracing/coresight/coresight-cti.h @@ -74,6 +74,8 @@ struct cti_trig_grp { * @con_dev: coresight device connected to the CTI, NULL if not CS device * @con_dev_name: name of connected device (CS or CPU) * @node: entry node in list of connections. + * @con_attrs: Dynamic sysfs attributes specific to this connection. + * @attr_group: Dynamic attribute group created for this connection. */ struct cti_trig_con { struct cti_trig_grp *con_in; @@ -81,6 +83,8 @@ struct cti_trig_con { struct coresight_device *con_dev; char *con_dev_name; struct list_head node; + struct attribute **con_attrs; + struct attribute_group *attr_group; }; /** @@ -91,12 +95,15 @@ struct cti_trig_con { * assumed there is a single CTM per SoC, ID 0). * @trig_cons: list of connections to this device. * @cpu: CPU ID if associated with CPU, -1 otherwise. + * @con_groups: combined static and dynamic sysfs groups for trigger + * connections. */ struct cti_device { int nr_trig_con; u32 ctm_id; struct list_head trig_cons; int cpu; + const struct attribute_group **con_groups; }; /** @@ -214,6 +221,7 @@ int cti_channel_gate_op(struct device *dev, enum cti_chan_gate_op op, u32 channel_idx); int cti_channel_setop(struct device *dev, enum cti_chan_set_op op, u32 channel_idx); +int cti_create_cons_sysfs(struct device *dev, struct cti_drvdata *drvdata); struct coresight_platform_data * coresight_cti_get_platform_data(struct device *dev); const char *cti_plat_get_node_name(struct fwnode_handle *fwnode);