From patchwork Thu Apr 14 06:44:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Leach X-Patchwork-Id: 12812977 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3FAEBC433EF for ; Thu, 14 Apr 2022 06:46:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=qwCwQMU4tcyTTrAP7ENMzND9O+L87vOPdG/vxoeDzxk=; b=tfL9zhoZ0BopEv uKlNZaJ7ioH8IvFYBKgupRj96C7xF/NNT/ZliAMM45VC8BNdPFEwJ8PAoxKHA1pFtGRolEQGVxnPY xvgR7kTWG1auhjHRDiF9XERL1PUVcJd8Q6rrYV/HU4YeUb+gJPv3k1TfaS+qzjOxek/h7DpeDKK3X 4yGa5fmquoQoqnWrCckm0WdUIOr9PrQF3Z4Aq6D4u/HyHtkQ0SjLM+9nS8dxE5x99J/EAJgaNnnVT 3RU6vTZcIzd1Tt7PnX8laBhSyJjy/3aOqu1/BqrF0PlDIeoHlmoWPu5OqHtPnEh7bBCIFSTz+mmbP /L9a4ymMRMqWSFb1PxlQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1netEB-0049Vp-E7; Thu, 14 Apr 2022 06:45:15 +0000 Received: from mail-wm1-x331.google.com ([2a00:1450:4864:20::331]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1netDy-0049Rt-2W for linux-arm-kernel@lists.infradead.org; Thu, 14 Apr 2022 06:45:05 +0000 Received: by mail-wm1-x331.google.com with SMTP id n126-20020a1c2784000000b0038e8af3e788so2537312wmn.1 for ; Wed, 13 Apr 2022 23:45:01 -0700 (PDT) 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=9BKKPdNJmFz6p4Ev8YUXdlUqAPgjPLDrJOr5q/gT/4k=; b=GIsHw8pUrIO9Qa9KY0c4tDG/AO9Lnz+SnHNOVrCF6UQL/7S+G0NZNd53L3Gh1pCys7 d/pYuqTqH1S/7lRWYflpmHWwsd2JOTYV2b8NOXJPX3pwIO0b+l3rphXFSjlk/kMCuZOV utNh93o7kbf6Kiu3+pNy5GYuBwn/uVgfKG9SqV2C/6wpAg9w//5yIvYYe1X/xYLYYqzf q/nK9OivCb+R8+yQhliea3ozzXCfMGjze/XEXwzq/++NpimfP6lBzEWRvMh4BrEpLjSw 9t0qmgrAFnJQB90fhPvHgLQqTtjYrDB6G8WXrsoXxTelKwVdiI2mQGgA5xvOSCaaoOWV d49Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=9BKKPdNJmFz6p4Ev8YUXdlUqAPgjPLDrJOr5q/gT/4k=; b=Clg/GjEUjrg8ZrOHNzmXzeUjnVkGJwsg+SskYOBXgnrBKe5cDbFj2UU2H7+ayJn5JL u8bKmQoEeXx1T5gdEt+5CqufuFNgnEiZYgLyONkX3mAfN8MzNyq5xAdNhliD0rqdQ07T 7LMbhBfI2VqHtctlxOg9t2z8vYiPaNFrkijUnSljy8sXVRsfsWkqIjL89f4CZS3ZwKSE /H0AS0OrG+PyeSx2dWNH7XWz8YJ1HvEdRXBYVKrq7HsZO4CFO0svc4/av6bSCQozMmCd /qJR/KGOHKLy7UORYWC+rQKOexjsIV8dURhI51kRjaDYcClN6PgYzik4f1e+D72ZJ4g4 pVVA== X-Gm-Message-State: AOAM530EWAiFmMEedM9B8JWwKAgoWmsArEY/5kpdprkjDTSzyILmyH1w 1RBvkATu2d0HkpqR2rZQ1Qp0KH6K/SKNYw== X-Google-Smtp-Source: ABdhPJzkQ2mkcKrafyAPtudHjJR640UCvS9nz8hx2pDxvD1g1FYVeNGrrT3tKasUopkuiQxLxrALgg== X-Received: by 2002:a05:600c:3492:b0:38e:d3ea:9ae3 with SMTP id a18-20020a05600c349200b0038ed3ea9ae3mr2163290wmq.174.1649918700158; Wed, 13 Apr 2022 23:45:00 -0700 (PDT) Received: from linaro.org ([2a00:23c5:6809:2201:e4bb:355f:cdcf:ea80]) by smtp.gmail.com with ESMTPSA id c18-20020a7bc852000000b0038ebf5f191esm5395954wml.45.2022.04.13.23.44.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Apr 2022 23:44:59 -0700 (PDT) From: Mike Leach To: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org, mathieu.poirier@linaro.org Cc: suzuki.poulose@arm.com, leo.yan@linaro.org, Mike Leach Subject: [PATCH v3 1/5] coresight: configfs: Add in functionality for load via configfs Date: Thu, 14 Apr 2022 07:44:53 +0100 Message-Id: <20220414064457.12052-2-mike.leach@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220414064457.12052-1-mike.leach@linaro.org> References: <20220414064457.12052-1-mike.leach@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220413_234502_174643_212B31B0 X-CRM114-Status: GOOD ( 31.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add in functionality to allow load via configfs. define a binary file format and provide a reader for that format that will create and populate configuration and feature structures use by the driver infrastructure. Signed-off-by: Mike Leach --- drivers/hwtracing/coresight/Makefile | 2 +- .../coresight/coresight-config-file.c | 432 ++++++++++++++++++ .../coresight/coresight-config-file.h | 117 +++++ .../hwtracing/coresight/coresight-config.h | 15 + .../hwtracing/coresight/coresight-syscfg.h | 1 + 5 files changed, 566 insertions(+), 1 deletion(-) create mode 100644 drivers/hwtracing/coresight/coresight-config-file.c create mode 100644 drivers/hwtracing/coresight/coresight-config-file.h diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile index b6c4a48140ec..5de2bb79f4ac 100644 --- a/drivers/hwtracing/coresight/Makefile +++ b/drivers/hwtracing/coresight/Makefile @@ -6,7 +6,7 @@ obj-$(CONFIG_CORESIGHT) += coresight.o coresight-y := coresight-core.o coresight-etm-perf.o coresight-platform.o \ coresight-sysfs.o coresight-syscfg.o coresight-config.o \ coresight-cfg-preload.o coresight-cfg-afdo.o \ - coresight-syscfg-configfs.o + coresight-syscfg-configfs.o coresight-config-file.o obj-$(CONFIG_CORESIGHT_LINK_AND_SINK_TMC) += coresight-tmc.o coresight-tmc-y := coresight-tmc-core.o coresight-tmc-etf.o \ coresight-tmc-etr.o diff --git a/drivers/hwtracing/coresight/coresight-config-file.c b/drivers/hwtracing/coresight/coresight-config-file.c new file mode 100644 index 000000000000..3fd001938324 --- /dev/null +++ b/drivers/hwtracing/coresight/coresight-config-file.c @@ -0,0 +1,432 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020 Linaro Limited, All rights reserved. + * Author: Mike Leach + */ + +#include "coresight-config.h" +#include "coresight-config-file.h" +#include "coresight-syscfg.h" + +#define cscfg_extract_u64(val64) { \ + val64 = *(u64 *)(buffer + used); \ + used += sizeof(u64); \ + } + +#define cscfg_extract_u32(val32) { \ + val32 = *(u32 *)(buffer + used); \ + used += sizeof(u32); \ + } + +#define cscfg_extract_u16(val16) { \ + val16 = *(u16 *)(buffer + used); \ + used += sizeof(u16); \ + } + +#define cscfg_extract_u8(val8) { \ + val8 = *(buffer + used); \ + used++; \ + } + +static int cscfg_file_read_hdr(const u8 *buffer, const int buflen, int *buf_used, + struct cscfg_file_header *hdr) +{ + /* file header always at the start of the buffer */ + int used = 0; + + if (buflen < sizeof(struct cscfg_file_header)) + return -EINVAL; + + cscfg_extract_u32(hdr->magic_version); + if (hdr->magic_version != CSCFG_FILE_MAGIC_VERSION) + return -EINVAL; + + cscfg_extract_u16(hdr->length); + if (hdr->length > buflen) + return -EINVAL; + + cscfg_extract_u16(hdr->nr_features); + + *buf_used = used; + return 0; +} + +static int cscfg_file_read_elem_hdr(const u8 *buffer, const int buflen, int *buf_used, + struct cscfg_file_elem_header *elem_hdr) +{ + int used = *buf_used; + + if ((buflen - used) < (sizeof(u16) + sizeof(u8))) + return -EINVAL; + + /* read length and check enough buffer remains for this element */ + elem_hdr->elem_length = *(u16 *)(buffer + used); + if ((buflen - used) < elem_hdr->elem_length) + return -EINVAL; + /* don't use extract fn as we update used _after_ the comparison */ + used += sizeof(u16); + + /* read type and validate */ + cscfg_extract_u8(elem_hdr->elem_type); + if ((elem_hdr->elem_type < CSCFG_FILE_ELEM_TYPE_FEAT) || + (elem_hdr->elem_type > CSCFG_FILE_ELEM_TYPE_CFG)) + return -EINVAL; + + *buf_used = used; + return 0; +} + +static int cscfg_file_read_elem_str(const u8 *buffer, const int buflen, int *buf_used, + struct cscfg_file_elem_str *elem_str) +{ + int used = *buf_used; + + if ((buflen - used) < sizeof(u16)) + return -EINVAL; + + cscfg_extract_u16(elem_str->str_len); + + if ((buflen - used) < elem_str->str_len) + return -EINVAL; + + /* check for 0 termination */ + if (buffer[elem_str->str_len - 1] != 0) + return -EINVAL; + + elem_str->str = devm_kstrdup(cscfg_device(), (char *)buffer, GFP_KERNEL); + used += elem_str->str_len; + + *buf_used = used; + return 0; +} + +static int cscfg_file_alloc_desc_arrays(struct cscfg_fs_load_descs *desc_arrays, + int nr_features) +{ + /* arrays are 0 terminated - max of 1 config & nr_features features */ + desc_arrays->config_descs = devm_kcalloc(cscfg_device(), 2, + sizeof(struct cscfg_config_desc *), + GFP_KERNEL); + if (!desc_arrays->config_descs) + return -ENOMEM; + desc_arrays->feat_descs = devm_kcalloc(cscfg_device(), nr_features + 1, + sizeof(struct cscfg_feature_desc *), + GFP_KERNEL); + if (!desc_arrays->feat_descs) + return -ENOMEM; + return 0; +} + +static int cscfg_file_read_elem_config(const u8 *buffer, const int buflen, int *buf_used, + struct cscfg_fs_load_descs *desc_arrays) +{ + struct cscfg_file_elem_header elem_hdr; + struct cscfg_file_elem_str elem_str; + struct cscfg_config_desc *config_desc; + int used = *buf_used, nr_preset_vals, nr_preset_bytes, i; + int err = 0; + u64 *presets; + + /* + * read the header - if not config, then don't update buf_used + * pointer on return + */ + err = cscfg_file_read_elem_hdr(buffer, buflen, &used, &elem_hdr); + if (err) + return err; + if (elem_hdr.elem_type != CSCFG_FILE_ELEM_TYPE_CFG) + return 0; + + /* we have a config - allocate the descriptor */ + config_desc = devm_kzalloc(cscfg_device(), sizeof(struct cscfg_config_desc), + GFP_KERNEL); + if (!config_desc) + return -ENOMEM; + + /* read the name string */ + err = cscfg_file_read_elem_str(buffer, buflen, &used, &elem_str); + if (err) + return err; + config_desc->name = elem_str.str; + + /* read the description string */ + err = cscfg_file_read_elem_str(buffer, buflen, &used, &elem_str); + if (err) + return err; + config_desc->description = elem_str.str; + + /* read in some values */ + if ((buflen - used) < sizeof(u64)) + return -EINVAL; + cscfg_extract_u16(config_desc->nr_presets); + cscfg_extract_u32(config_desc->nr_total_params); + cscfg_extract_u16(config_desc->nr_feat_refs); + + /* read the array of 64bit presets if present */ + nr_preset_vals = config_desc->nr_total_params * config_desc->nr_presets; + if (nr_preset_vals) { + presets = devm_kcalloc(cscfg_device(), nr_preset_vals, + sizeof(u64), GFP_KERNEL); + if (!presets) + return -ENOMEM; + + nr_preset_bytes = sizeof(u64) * nr_preset_vals; + if ((buflen - used) < nr_preset_bytes) + return -EINVAL; + + memcpy(presets, (buffer + used), nr_preset_bytes); + config_desc->presets = presets; + used += nr_preset_bytes; + } + + /* read the array of feature names referenced by the config */ + if (config_desc->nr_feat_refs) { + config_desc->feat_ref_names = devm_kcalloc(cscfg_device(), + config_desc->nr_feat_refs, + sizeof(char *), + GFP_KERNEL); + if (!config_desc->feat_ref_names) + return -ENOMEM; + + for (i = 0; i < config_desc->nr_feat_refs; i++) { + err = cscfg_file_read_elem_str(buffer, buflen, &used, &elem_str); + if (err) + return err; + config_desc->feat_ref_names[i] = elem_str.str; + } + } + + desc_arrays->config_descs[0] = config_desc; + *buf_used = used; + return 0; +} + +/* just read the config name - if there is a config at this position */ +static int cscfg_file_read_elem_config_name(const u8 *buffer, const int buflen, int *buf_used, + struct cscfg_file_elem_str *elem_str) +{ + struct cscfg_file_elem_header elem_hdr; + int used = *buf_used; + int err; + + elem_str->str_len = 0; + /* + * read the header - if not config, then don't update buf_used + * pointer on return + */ + err = cscfg_file_read_elem_hdr(buffer, buflen, &used, &elem_hdr); + if (err) + return err; + if (elem_hdr.elem_type != CSCFG_FILE_ELEM_TYPE_CFG) + return 0; + + /* read the name string */ + err = cscfg_file_read_elem_str(buffer, buflen, &used, elem_str); + if (err) + return err; + *buf_used = used; + + return 0; +} + +static int cscfg_file_read_elem_param(const u8 *buffer, const int buflen, int *buf_used, + struct cscfg_parameter_desc *param_desc) +{ + struct cscfg_file_elem_str elem_str; + int err = 0, used = *buf_used; + + /* parameter name */ + err = cscfg_file_read_elem_str(buffer, buflen, &used, &elem_str); + if (err) + return err; + param_desc->name = elem_str.str; + + /* parameter value */ + if ((buflen - used) < sizeof(u64)) + return -EINVAL; + cscfg_extract_u64(param_desc->value); + + *buf_used = used; + return err; +} + +static int cscfg_file_read_elem_feature(const u8 *buffer, const int buflen, int *buf_used, + struct cscfg_fs_load_descs *desc_arrays, + const int feat_idx) +{ + struct cscfg_file_elem_header elem_hdr; + struct cscfg_file_elem_str elem_str; + struct cscfg_feature_desc *feat_desc; + struct cscfg_regval_desc *p_reg_desc; + int used = *buf_used, err, i, nr_regs_bytes; + u32 val32; + + /* allocate the feature descriptor object */ + feat_desc = devm_kzalloc(cscfg_device(), sizeof(struct cscfg_feature_desc), + GFP_KERNEL); + if (!feat_desc) + return -ENOMEM; + + /* read and check the element header */ + err = cscfg_file_read_elem_hdr(buffer, buflen, &used, &elem_hdr); + if (err) + return err; + + if (elem_hdr.elem_type != CSCFG_FILE_ELEM_TYPE_FEAT) + return -EINVAL; + + /* read the feature name */ + err = cscfg_file_read_elem_str(buffer, buflen, &used, &elem_str); + if (err) + return err; + feat_desc->name = elem_str.str; + + /* read the description string */ + err = cscfg_file_read_elem_str(buffer, buflen, &used, &elem_str); + if (err) + return err; + feat_desc->description = elem_str.str; + + /* + * read in some values + * [u32 value: match_flags] + * [u16 value: nr_regs] - number of registers. + * [u16 value: nr_params] - number of parameters. + */ + cscfg_extract_u32(feat_desc->match_flags); + cscfg_extract_u16(feat_desc->nr_regs); + cscfg_extract_u16(feat_desc->nr_params); + + /* register descriptors - 32 bit + 64 bit value */ + if (feat_desc->nr_regs) { + nr_regs_bytes = ((sizeof(u32) + sizeof(u64)) * feat_desc->nr_regs); + if ((buflen - used) < nr_regs_bytes) + return -EINVAL; + feat_desc->regs_desc = devm_kcalloc(cscfg_device(), + feat_desc->nr_regs, + sizeof(struct cscfg_regval_desc), + GFP_KERNEL); + if (!feat_desc->regs_desc) + return -ENOMEM; + + for (i = 0; i < feat_desc->nr_regs; i++) { + cscfg_extract_u32(val32); + p_reg_desc = (struct cscfg_regval_desc *)&feat_desc->regs_desc[i]; + CSCFG_FILE_U32_TO_REG_DESC_INFO(val32, p_reg_desc); + cscfg_extract_u64(feat_desc->regs_desc[i].val64); + } + } + + /* parameter descriptors - string + 64 bit value */ + if (feat_desc->nr_params) { + feat_desc->params_desc = devm_kcalloc(cscfg_device(), + feat_desc->nr_params, + sizeof(struct cscfg_parameter_desc), + GFP_KERNEL); + if (!feat_desc->params_desc) + return -ENOMEM; + for (i = 0; i < feat_desc->nr_params; i++) { + err = cscfg_file_read_elem_param(buffer, buflen, &used, + &feat_desc->params_desc[i]); + if (err) + return err; + } + } + + desc_arrays->feat_descs[feat_idx] = feat_desc; + *buf_used = used; + return 0; +} + +/* just read the feature name - if there is a feature at this position */ +static int cscfg_file_read_elem_feat_name(const u8 *buffer, const int buflen, int *buf_used, + struct cscfg_file_elem_str *elem_str) +{ + struct cscfg_file_elem_header elem_hdr; + int used = *buf_used; + int err; + + elem_str->str_len = 0; + /* + * read the header - if not config, then don't update buf_used + * pointer on return + */ + err = cscfg_file_read_elem_hdr(buffer, buflen, &used, &elem_hdr); + if (err) + return err; + if (elem_hdr.elem_type != CSCFG_FILE_ELEM_TYPE_FEAT) + return -EINVAL; + + /* read the feature name */ + err = cscfg_file_read_elem_str(buffer, buflen, &used, elem_str); + if (err) + return err; + *buf_used = used; + + return 0; +} + +/* + * Read a buffer and create the configuration and feature + * descriptors to load into the cscfg system + */ +int cscfg_file_read_buffer(const u8 *buffer, const int buflen, + struct cscfg_fs_load_descs *desc_arrays) +{ + struct cscfg_file_header hdr; + int used = 0, err, i; + + /* read in the file header */ + err = cscfg_file_read_hdr(buffer, buflen, &used, &hdr); + if (err) + return err; + + /* allocate the memory for the descriptor pointer arrays */ + err = cscfg_file_alloc_desc_arrays(desc_arrays, hdr.nr_features); + if (err) + return err; + + /* read elements */ + + /* first element could be a config so check */ + err = cscfg_file_read_elem_config(buffer, buflen, &used, desc_arrays); + if (err) + return err; + + /* now read and populate all the feature descriptors */ + for (i = 0; i < hdr.nr_features; i++) { + err = cscfg_file_read_elem_feature(buffer, buflen, &used, desc_arrays, i); + if (err) + return err; + } + return used; +} + +int cscfg_file_read_buffer_first_name(const u8 *buffer, const int buflen, + const char **name) +{ + struct cscfg_file_header hdr; + struct cscfg_file_elem_str elem_str; + int used = 0, err = 0; + + *name = NULL; + + /* read in the file header */ + err = cscfg_file_read_hdr(buffer, buflen, &used, &hdr); + if (err) + return err; + + err = cscfg_file_read_elem_config_name(buffer, buflen, &used, &elem_str); + if (err) + return err; + + /* no config string - get first feature name */ + if (!elem_str.str_len) { + err = cscfg_file_read_elem_feat_name(buffer, buflen, &used, &elem_str); + if (err) + return err; + } + if (elem_str.str_len) + *name = elem_str.str; + return err; +} diff --git a/drivers/hwtracing/coresight/coresight-config-file.h b/drivers/hwtracing/coresight/coresight-config-file.h new file mode 100644 index 000000000000..591f4c2c4be9 --- /dev/null +++ b/drivers/hwtracing/coresight/coresight-config-file.h @@ -0,0 +1,117 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2020 Linaro Limited, All rights reserved. + * Author: Mike Leach + */ + +#ifndef _CORESIGHT_CORESIGHT_CONFIG_FILE_H +#define _CORESIGHT_CORESIGHT_CONFIG_FILE_H + +/* + * Structures to represent configuration descriptors in a memory buffer + * to serialise to and from files + * + * File structure - for loading a configuration + features + * from configfs. + * + * [cscfg_file_header] - mandatory + * [CONFIG_ELEM] - optional - only one permitted, + * [FEATURE_ELEM] * [cscfg_file_header.nr_features] + * - optional - file valid with config only. + * + * Invalid file if no config or features. + * + * + * File structure for [CONFIG_ELEM]: + * + * [cscfg_file_elem_header] - header length value to end of feature strings. + * [cscfg_file_elem_str] - name of the configuration + * [cscfg_file_elem_str] - description of configuration + * [u16 value - nr_presets] + * [u32 value - nr_total_params] + * [u16 value - nr_feat_refs] + * [u64 values] * (nr_presets * nr_total_params) + * [cscfg_file_elem_str] * nr_feat_refs + * + * Only one configuration per file. + * + * File structure for a [FEATURE_ELEM] + * + * [cscfg_file_elem_header] - header length is total bytes to end of param structures. + * [cscfg_file_elem_str] - feature name. + * [cscfg_file_elem_str] - feature description. + * [u32 value: match_flags] + * [u16 value: nr_regs] - number of registers. + * [u16 value: nr_params] - number of parameters. + * [cscfg_regval_desc struct] * nr_regs + * [PARAM_ELEM] * nr_params + * + * File structure for [PARAM_ELEM] + * + * [cscfg_file_elem_str] - parameter name. + * [u64 value: param_value] - initial value. + */ + +/* major element types - configurations and features */ + +#define CSCFG_FILE_ELEM_TYPE_FEAT 0x1 +#define CSCFG_FILE_ELEM_TYPE_CFG 0x2 + +#define CSCFG_FILE_MAGIC_VERSION 0xC5CF0001 + +#define CSCFG_FILE_U32_TO_REG_DESC_INFO(val32, p_desc) \ + { \ + p_desc->type = (val32 >> 24) & 0xFF; \ + p_desc->offset = (val32 >> 12) & 0xFFF; \ + p_desc->hw_info = val32 & 0xFFF; \ + } + +#define CSCFG_FILE_REG_DESC_INFO_TO_U32(val32, p_desc) \ + { \ + val32 = p_desc->hw_info & 0xFFF; \ + val32 |= ((p_desc->offset & 0xFFF) << 12); \ + val32 |= ((p_desc->type & 0xFF) << 24); \ + } + +/* binary attributes in configfs need a max size - declare a value for this. */ +#define CSCFG_FILE_MAXSIZE 16384 + +/* limit string sizes */ +#define CSCFG_FILE_STR_MAXSIZE 1024 + +/** + * file header. + * + * @magic_version: magic number / version for file/buffer format. + * @length : total length of all data in the buffer. + * @nr_features : total number of features in the buffer. + */ +struct cscfg_file_header { + u32 magic_version; + u16 length; + u16 nr_features; +}; + +/** + * element header + * + * @elem_length: total length of this element + * @elem_type : type of this element - one of CSCFG_FILE_ELEM_TYPE.. defines. + */ +struct cscfg_file_elem_header { + u16 elem_length; + u8 elem_type; +}; + +/** + * string file element. + * + * @str_len: length of string buffer including 0 terminator + * @str : string buffer - 0 terminated. + */ +struct cscfg_file_elem_str { + u16 str_len; + char *str; +}; + +#endif /* _CORESIGHT_CORESIGHT_CONFIG_FILE_H */ diff --git a/drivers/hwtracing/coresight/coresight-config.h b/drivers/hwtracing/coresight/coresight-config.h index 2e1670523461..9cd3c26ce023 100644 --- a/drivers/hwtracing/coresight/coresight-config.h +++ b/drivers/hwtracing/coresight/coresight-config.h @@ -85,6 +85,21 @@ struct cscfg_regval_desc { }; }; +/** + * Dynamically loaded descriptor arrays loaded via configfs. + * + * For builtin or module loaded configurations / features these are + * statically defined at compile time. For configfs we create the arrays + * dynamically so need a structure to handle this. + * + * @config_descs: array of config descriptor pointers. + * @feat_descs: array of feature descriptor pointers. + */ +struct cscfg_fs_load_descs { + struct cscfg_config_desc **config_descs; + struct cscfg_feature_desc **feat_descs; +}; + /** * Device feature descriptor - combination of registers and parameters to * program a device to implement a specific complex function. diff --git a/drivers/hwtracing/coresight/coresight-syscfg.h b/drivers/hwtracing/coresight/coresight-syscfg.h index 9106ffab4833..6a6e33585be9 100644 --- a/drivers/hwtracing/coresight/coresight-syscfg.h +++ b/drivers/hwtracing/coresight/coresight-syscfg.h @@ -66,6 +66,7 @@ struct cscfg_registered_csdev { enum cscfg_load_owner_type { CSCFG_OWNER_PRELOAD, CSCFG_OWNER_MODULE, + CSCFG_OWNER_CONFIGFS, }; /**