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[104.188.17.28]) by smtp.gmail.com with ESMTPSA id c22sm16789196pfo.50.2019.12.26.21.32.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Dec 2019 21:32:53 -0800 (PST) From: Bjorn Andersson To: Rob Herring , Mark Rutland , Ohad Ben-Cohen Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org, Sibi Sankar , Rishabh Bhatnagar Subject: [PATCH v2 2/8] remoteproc: qcom: Introduce driver to store pil info in IMEM Date: Thu, 26 Dec 2019 21:32:09 -0800 Message-Id: <20191227053215.423811-3-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191227053215.423811-1-bjorn.andersson@linaro.org> References: <20191227053215.423811-1-bjorn.andersson@linaro.org> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A region in IMEM is used to communicate load addresses of remoteproc to post mortem debug tools. Implement a driver that can be used to store this information in order to enable these tools to process collected ramdumps. Signed-off-by: Bjorn Andersson --- Changes since v1: - Added helper to probe defer clients - Fixed logical bug in slot scan - Added SPDX header in header file drivers/remoteproc/Kconfig | 3 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/qcom_pil_info.c | 150 +++++++++++++++++++++++++++++ drivers/remoteproc/qcom_pil_info.h | 8 ++ 4 files changed, 162 insertions(+) create mode 100644 drivers/remoteproc/qcom_pil_info.c create mode 100644 drivers/remoteproc/qcom_pil_info.h -- 2.24.0 diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index 94afdde4bc9f..0798602e355a 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -85,6 +85,9 @@ config KEYSTONE_REMOTEPROC It's safe to say N here if you're not interested in the Keystone DSPs or just want to use a bare minimum kernel. +config QCOM_PIL_INFO + tristate + config QCOM_RPROC_COMMON tristate diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index 00f09e658cb3..c1b46e9033cb 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o obj-$(CONFIG_KEYSTONE_REMOTEPROC) += keystone_remoteproc.o +obj-$(CONFIG_QCOM_PIL_INFO) += qcom_pil_info.o obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o obj-$(CONFIG_QCOM_Q6V5_COMMON) += qcom_q6v5.o obj-$(CONFIG_QCOM_Q6V5_ADSP) += qcom_q6v5_adsp.o diff --git a/drivers/remoteproc/qcom_pil_info.c b/drivers/remoteproc/qcom_pil_info.c new file mode 100644 index 000000000000..b0897ae9eae5 --- /dev/null +++ b/drivers/remoteproc/qcom_pil_info.c @@ -0,0 +1,150 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2019 Linaro Ltd. + */ +#include +#include +#include +#include +#include +#include +#include +#include + +struct pil_reloc_entry { + char name[8]; + __le64 base; + __le32 size; +} __packed; + +#define PIL_INFO_SIZE 200 +#define PIL_INFO_ENTRIES (PIL_INFO_SIZE / sizeof(struct pil_reloc_entry)) + +struct pil_reloc { + struct device *dev; + struct regmap *map; + u32 offset; + int val_bytes; + + struct pil_reloc_entry entries[PIL_INFO_ENTRIES]; +}; + +static struct pil_reloc *_reloc; +static DEFINE_MUTEX(reloc_mutex); + +/** + * qcom_pil_info_store() - store PIL information of image in IMEM + * @image: name of the image + * @base: base address of the loaded image + * @size: size of the loaded image + */ +void qcom_pil_info_store(const char *image, phys_addr_t base, size_t size) +{ + struct pil_reloc_entry *entry; + int idx = -1; + int i; + + mutex_lock(&reloc_mutex); + if (!_reloc) + goto unlock; + + for (i = 0; i < PIL_INFO_ENTRIES; i++) { + if (!_reloc->entries[i].name[0]) { + if (idx == -1) + idx = i; + continue; + } + + if (!strncmp(_reloc->entries[i].name, image, 8)) { + idx = i; + goto found; + } + } + + if (idx == -1) { + dev_warn(_reloc->dev, "insufficient PIL info slots\n"); + goto unlock; + } + +found: + entry = &_reloc->entries[idx]; + stracpy(entry->name, image); + entry->base = base; + entry->size = size; + + regmap_bulk_write(_reloc->map, _reloc->offset + idx * sizeof(*entry), + entry, sizeof(*entry) / _reloc->val_bytes); + +unlock: + mutex_unlock(&reloc_mutex); +} +EXPORT_SYMBOL_GPL(qcom_pil_info_store); + +/** + * qcom_pil_info_available() - query if the pil info is probed + * + * Return: boolean indicating if the pil info device is probed + */ +bool qcom_pil_info_available(void) +{ + return !!_reloc; +} +EXPORT_SYMBOL_GPL(qcom_pil_info_available); + +static int pil_reloc_probe(struct platform_device *pdev) +{ + struct pil_reloc *reloc; + + reloc = devm_kzalloc(&pdev->dev, sizeof(*reloc), GFP_KERNEL); + if (!reloc) + return -ENOMEM; + + reloc->dev = &pdev->dev; + reloc->map = syscon_node_to_regmap(pdev->dev.parent->of_node); + if (IS_ERR(reloc->map)) + return PTR_ERR(reloc->map); + + if (of_property_read_u32(pdev->dev.of_node, "offset", &reloc->offset)) + return -EINVAL; + + reloc->val_bytes = regmap_get_val_bytes(reloc->map); + if (reloc->val_bytes < 0) + return -EINVAL; + + regmap_bulk_write(reloc->map, reloc->offset, reloc->entries, + sizeof(reloc->entries) / reloc->val_bytes); + + mutex_lock(&reloc_mutex); + _reloc = reloc; + mutex_unlock(&reloc_mutex); + + return 0; +} + +static int pil_reloc_remove(struct platform_device *pdev) +{ + mutex_lock(&reloc_mutex); + _reloc = NULL; + mutex_unlock(&reloc_mutex); + + return 0; +} + +static const struct of_device_id pil_reloc_of_match[] = { + { .compatible = "qcom,pil-reloc-info" }, + {} +}; +MODULE_DEVICE_TABLE(of, pil_reloc_of_match); + +static struct platform_driver pil_reloc_driver = { + .probe = pil_reloc_probe, + .remove = pil_reloc_remove, + .driver = { + .name = "qcom-pil-reloc-info", + .of_match_table = pil_reloc_of_match, + }, +}; +module_platform_driver(pil_reloc_driver); + +MODULE_DESCRIPTION("Qualcomm PIL relocation info"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/remoteproc/qcom_pil_info.h b/drivers/remoteproc/qcom_pil_info.h new file mode 100644 index 000000000000..0372602fae1d --- /dev/null +++ b/drivers/remoteproc/qcom_pil_info.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __QCOM_PIL_INFO_H__ +#define __QCOM_PIL_INFO_H__ + +void qcom_pil_info_store(const char *image, phys_addr_t base, size_t size); +bool qcom_pil_info_available(void); + +#endif