From 50ba0232fd5312410f1b65247e774244f89a628e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 18 May 2024 20:50:36 +0200 Subject: Merging upstream version 6.8.9. Signed-off-by: Daniel Baumann --- drivers/nvmem/Kconfig | 1 + drivers/nvmem/Makefile | 2 + drivers/nvmem/core.c | 360 ++++++++++++++++++++++----------------- drivers/nvmem/imx-ocotp.c | 11 +- drivers/nvmem/internals.h | 59 +++++++ drivers/nvmem/layouts.c | 201 ++++++++++++++++++++++ drivers/nvmem/layouts/Kconfig | 8 + drivers/nvmem/layouts/onie-tlv.c | 29 +++- drivers/nvmem/layouts/sl28vpd.c | 29 +++- drivers/nvmem/mtk-efuse.c | 11 +- drivers/nvmem/stm32-romem.c | 16 ++ drivers/nvmem/u-boot-env.c | 84 +++++---- 12 files changed, 586 insertions(+), 225 deletions(-) create mode 100644 drivers/nvmem/internals.h create mode 100644 drivers/nvmem/layouts.c (limited to 'drivers/nvmem') diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 5bc9c4874f..283134498f 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only menuconfig NVMEM bool "NVMEM Support" + imply NVMEM_LAYOUTS help Support for NVMEM(Non Volatile Memory) devices like EEPROM, EFUSES... diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index 423baf0895..cdd01fbf13 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -5,6 +5,8 @@ obj-$(CONFIG_NVMEM) += nvmem_core.o nvmem_core-y := core.o +obj-$(CONFIG_NVMEM_LAYOUTS) += nvmem_layouts.o +nvmem_layouts-y := layouts.o obj-y += layouts/ # Devices diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 608b352a7d..eb357ac2e5 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -19,29 +19,7 @@ #include #include -struct nvmem_device { - struct module *owner; - struct device dev; - int stride; - int word_size; - int id; - struct kref refcnt; - size_t size; - bool read_only; - bool root_only; - int flags; - enum nvmem_type type; - struct bin_attribute eeprom; - struct device *base_dev; - struct list_head cells; - const struct nvmem_keepout *keepout; - unsigned int nkeepout; - nvmem_reg_read_t reg_read; - nvmem_reg_write_t reg_write; - struct gpio_desc *wp_gpio; - struct nvmem_layout *layout; - void *priv; -}; +#include "internals.h" #define to_nvmem_device(d) container_of(d, struct nvmem_device, dev) @@ -77,9 +55,6 @@ static LIST_HEAD(nvmem_lookup_list); static BLOCKING_NOTIFIER_HEAD(nvmem_notifier); -static DEFINE_SPINLOCK(nvmem_layout_lock); -static LIST_HEAD(nvmem_layouts); - static int __nvmem_reg_read(struct nvmem_device *nvmem, unsigned int offset, void *val, size_t bytes) { @@ -324,6 +299,43 @@ static umode_t nvmem_bin_attr_is_visible(struct kobject *kobj, return nvmem_bin_attr_get_umode(nvmem); } +static struct nvmem_cell *nvmem_create_cell(struct nvmem_cell_entry *entry, + const char *id, int index); + +static ssize_t nvmem_cell_attr_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t pos, size_t count) +{ + struct nvmem_cell_entry *entry; + struct nvmem_cell *cell = NULL; + size_t cell_sz, read_len; + void *content; + + entry = attr->private; + cell = nvmem_create_cell(entry, entry->name, 0); + if (IS_ERR(cell)) + return PTR_ERR(cell); + + if (!cell) + return -EINVAL; + + content = nvmem_cell_read(cell, &cell_sz); + if (IS_ERR(content)) { + read_len = PTR_ERR(content); + goto destroy_cell; + } + + read_len = min_t(unsigned int, cell_sz - pos, count); + memcpy(buf, content + pos, read_len); + kfree(content); + +destroy_cell: + kfree_const(cell->id); + kfree(cell); + + return read_len; +} + /* default read/write permissions */ static struct bin_attribute bin_attr_rw_nvmem = { .attr = { @@ -345,11 +357,21 @@ static const struct attribute_group nvmem_bin_group = { .is_bin_visible = nvmem_bin_attr_is_visible, }; +/* Cell attributes will be dynamically allocated */ +static struct attribute_group nvmem_cells_group = { + .name = "cells", +}; + static const struct attribute_group *nvmem_dev_groups[] = { &nvmem_bin_group, NULL, }; +static const struct attribute_group *nvmem_cells_groups[] = { + &nvmem_cells_group, + NULL, +}; + static struct bin_attribute bin_attr_nvmem_eeprom_compat = { .attr = { .name = "eeprom", @@ -405,6 +427,69 @@ static void nvmem_sysfs_remove_compat(struct nvmem_device *nvmem, device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); } +static int nvmem_populate_sysfs_cells(struct nvmem_device *nvmem) +{ + struct bin_attribute **cells_attrs, *attrs; + struct nvmem_cell_entry *entry; + unsigned int ncells = 0, i = 0; + int ret = 0; + + mutex_lock(&nvmem_mutex); + + if (list_empty(&nvmem->cells) || nvmem->sysfs_cells_populated) { + nvmem_cells_group.bin_attrs = NULL; + goto unlock_mutex; + } + + /* Allocate an array of attributes with a sentinel */ + ncells = list_count_nodes(&nvmem->cells); + cells_attrs = devm_kcalloc(&nvmem->dev, ncells + 1, + sizeof(struct bin_attribute *), GFP_KERNEL); + if (!cells_attrs) { + ret = -ENOMEM; + goto unlock_mutex; + } + + attrs = devm_kcalloc(&nvmem->dev, ncells, sizeof(struct bin_attribute), GFP_KERNEL); + if (!attrs) { + ret = -ENOMEM; + goto unlock_mutex; + } + + /* Initialize each attribute to take the name and size of the cell */ + list_for_each_entry(entry, &nvmem->cells, node) { + sysfs_bin_attr_init(&attrs[i]); + attrs[i].attr.name = devm_kasprintf(&nvmem->dev, GFP_KERNEL, + "%s@%x,%x", entry->name, + entry->offset, + entry->bit_offset); + attrs[i].attr.mode = 0444; + attrs[i].size = entry->bytes; + attrs[i].read = &nvmem_cell_attr_read; + attrs[i].private = entry; + if (!attrs[i].attr.name) { + ret = -ENOMEM; + goto unlock_mutex; + } + + cells_attrs[i] = &attrs[i]; + i++; + } + + nvmem_cells_group.bin_attrs = cells_attrs; + + ret = devm_device_add_groups(&nvmem->dev, nvmem_cells_groups); + if (ret) + goto unlock_mutex; + + nvmem->sysfs_cells_populated = true; + +unlock_mutex: + mutex_unlock(&nvmem_mutex); + + return ret; +} + #else /* CONFIG_NVMEM_SYSFS */ static int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem, @@ -697,7 +782,6 @@ static int nvmem_validate_keepouts(struct nvmem_device *nvmem) static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np) { - struct nvmem_layout *layout = nvmem->layout; struct device *dev = &nvmem->dev; struct device_node *child; const __be32 *addr; @@ -727,8 +811,8 @@ static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_nod info.np = of_node_get(child); - if (layout && layout->fixup_cell_info) - layout->fixup_cell_info(nvmem, layout, &info); + if (nvmem->fixup_dt_cell_info) + nvmem->fixup_dt_cell_info(nvmem, &info); ret = nvmem_add_one_cell(nvmem, &info); kfree(info.name); @@ -763,117 +847,35 @@ static int nvmem_add_cells_from_fixed_layout(struct nvmem_device *nvmem) return err; } -int __nvmem_layout_register(struct nvmem_layout *layout, struct module *owner) -{ - layout->owner = owner; - - spin_lock(&nvmem_layout_lock); - list_add(&layout->node, &nvmem_layouts); - spin_unlock(&nvmem_layout_lock); - - blocking_notifier_call_chain(&nvmem_notifier, NVMEM_LAYOUT_ADD, layout); - - return 0; -} -EXPORT_SYMBOL_GPL(__nvmem_layout_register); - -void nvmem_layout_unregister(struct nvmem_layout *layout) -{ - blocking_notifier_call_chain(&nvmem_notifier, NVMEM_LAYOUT_REMOVE, layout); - - spin_lock(&nvmem_layout_lock); - list_del(&layout->node); - spin_unlock(&nvmem_layout_lock); -} -EXPORT_SYMBOL_GPL(nvmem_layout_unregister); - -static struct nvmem_layout *nvmem_layout_get(struct nvmem_device *nvmem) +int nvmem_layout_register(struct nvmem_layout *layout) { - struct device_node *layout_np; - struct nvmem_layout *l, *layout = ERR_PTR(-EPROBE_DEFER); - - layout_np = of_nvmem_layout_get_container(nvmem); - if (!layout_np) - return NULL; - - /* Fixed layouts don't have a matching driver */ - if (of_device_is_compatible(layout_np, "fixed-layout")) { - of_node_put(layout_np); - return NULL; - } - - /* - * In case the nvmem device was built-in while the layout was built as a - * module, we shall manually request the layout driver loading otherwise - * we'll never have any match. - */ - of_request_module(layout_np); - - spin_lock(&nvmem_layout_lock); - - list_for_each_entry(l, &nvmem_layouts, node) { - if (of_match_node(l->of_match_table, layout_np)) { - if (try_module_get(l->owner)) - layout = l; - - break; - } - } - - spin_unlock(&nvmem_layout_lock); - of_node_put(layout_np); - - return layout; -} + int ret; -static void nvmem_layout_put(struct nvmem_layout *layout) -{ - if (layout) - module_put(layout->owner); -} + if (!layout->add_cells) + return -EINVAL; -static int nvmem_add_cells_from_layout(struct nvmem_device *nvmem) -{ - struct nvmem_layout *layout = nvmem->layout; - int ret; + /* Populate the cells */ + ret = layout->add_cells(layout); + if (ret) + return ret; - if (layout && layout->add_cells) { - ret = layout->add_cells(&nvmem->dev, nvmem, layout); - if (ret) - return ret; +#ifdef CONFIG_NVMEM_SYSFS + ret = nvmem_populate_sysfs_cells(layout->nvmem); + if (ret) { + nvmem_device_remove_all_cells(layout->nvmem); + return ret; } +#endif return 0; } +EXPORT_SYMBOL_GPL(nvmem_layout_register); -#if IS_ENABLED(CONFIG_OF) -/** - * of_nvmem_layout_get_container() - Get OF node to layout container. - * - * @nvmem: nvmem device. - * - * Return: a node pointer with refcount incremented or NULL if no - * container exists. Use of_node_put() on it when done. - */ -struct device_node *of_nvmem_layout_get_container(struct nvmem_device *nvmem) -{ - return of_get_child_by_name(nvmem->dev.of_node, "nvmem-layout"); -} -EXPORT_SYMBOL_GPL(of_nvmem_layout_get_container); -#endif - -const void *nvmem_layout_get_match_data(struct nvmem_device *nvmem, - struct nvmem_layout *layout) +void nvmem_layout_unregister(struct nvmem_layout *layout) { - struct device_node __maybe_unused *layout_np; - const struct of_device_id *match; - - layout_np = of_nvmem_layout_get_container(nvmem); - match = of_match_node(layout->of_match_table, layout_np); - - return match ? match->data : NULL; + /* Keep the API even with an empty stub in case we need it later */ } -EXPORT_SYMBOL_GPL(nvmem_layout_get_match_data); +EXPORT_SYMBOL_GPL(nvmem_layout_unregister); /** * nvmem_register() - Register a nvmem device for given nvmem_config. @@ -925,6 +927,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) kref_init(&nvmem->refcnt); INIT_LIST_HEAD(&nvmem->cells); + nvmem->fixup_dt_cell_info = config->fixup_dt_cell_info; nvmem->owner = config->owner; if (!nvmem->owner && config->dev->driver) @@ -980,19 +983,6 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) goto err_put_device; } - /* - * If the driver supplied a layout by config->layout, the module - * pointer will be NULL and nvmem_layout_put() will be a noop. - */ - nvmem->layout = config->layout ?: nvmem_layout_get(nvmem); - if (IS_ERR(nvmem->layout)) { - rval = PTR_ERR(nvmem->layout); - nvmem->layout = NULL; - - if (rval == -EPROBE_DEFER) - goto err_teardown_compat; - } - if (config->cells) { rval = nvmem_add_cells(nvmem, config->cells, config->ncells); if (rval) @@ -1013,24 +1003,34 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config) if (rval) goto err_remove_cells; - rval = nvmem_add_cells_from_layout(nvmem); - if (rval) - goto err_remove_cells; - dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name); rval = device_add(&nvmem->dev); if (rval) goto err_remove_cells; + rval = nvmem_populate_layout(nvmem); + if (rval) + goto err_remove_dev; + +#ifdef CONFIG_NVMEM_SYSFS + rval = nvmem_populate_sysfs_cells(nvmem); + if (rval) + goto err_destroy_layout; +#endif + blocking_notifier_call_chain(&nvmem_notifier, NVMEM_ADD, nvmem); return nvmem; +#ifdef CONFIG_NVMEM_SYSFS +err_destroy_layout: + nvmem_destroy_layout(nvmem); +#endif +err_remove_dev: + device_del(&nvmem->dev); err_remove_cells: nvmem_device_remove_all_cells(nvmem); - nvmem_layout_put(nvmem->layout); -err_teardown_compat: if (config->compat) nvmem_sysfs_remove_compat(nvmem, config); err_put_device: @@ -1052,7 +1052,7 @@ static void nvmem_device_release(struct kref *kref) device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom); nvmem_device_remove_all_cells(nvmem); - nvmem_layout_put(nvmem->layout); + nvmem_destroy_layout(nvmem); device_unregister(&nvmem->dev); } @@ -1354,6 +1354,12 @@ nvmem_cell_get_from_lookup(struct device *dev, const char *con_id) return cell; } +static void nvmem_layout_module_put(struct nvmem_device *nvmem) +{ + if (nvmem->layout && nvmem->layout->dev.driver) + module_put(nvmem->layout->dev.driver->owner); +} + #if IS_ENABLED(CONFIG_OF) static struct nvmem_cell_entry * nvmem_find_cell_entry_by_node(struct nvmem_device *nvmem, struct device_node *np) @@ -1372,6 +1378,18 @@ nvmem_find_cell_entry_by_node(struct nvmem_device *nvmem, struct device_node *np return cell; } +static int nvmem_layout_module_get_optional(struct nvmem_device *nvmem) +{ + if (!nvmem->layout) + return 0; + + if (!nvmem->layout->dev.driver || + !try_module_get(nvmem->layout->dev.driver->owner)) + return -EPROBE_DEFER; + + return 0; +} + /** * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id * @@ -1434,16 +1452,29 @@ struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, const char *id) return ERR_CAST(nvmem); } + ret = nvmem_layout_module_get_optional(nvmem); + if (ret) { + of_node_put(cell_np); + __nvmem_device_put(nvmem); + return ERR_PTR(ret); + } + cell_entry = nvmem_find_cell_entry_by_node(nvmem, cell_np); of_node_put(cell_np); if (!cell_entry) { __nvmem_device_put(nvmem); - return ERR_PTR(-ENOENT); + nvmem_layout_module_put(nvmem); + if (nvmem->layout) + return ERR_PTR(-EPROBE_DEFER); + else + return ERR_PTR(-ENOENT); } cell = nvmem_create_cell(cell_entry, id, cell_index); - if (IS_ERR(cell)) + if (IS_ERR(cell)) { __nvmem_device_put(nvmem); + nvmem_layout_module_put(nvmem); + } return cell; } @@ -1557,6 +1588,7 @@ void nvmem_cell_put(struct nvmem_cell *cell) kfree(cell); __nvmem_device_put(nvmem); + nvmem_layout_module_put(nvmem); } EXPORT_SYMBOL_GPL(nvmem_cell_put); @@ -2132,13 +2164,37 @@ const char *nvmem_dev_name(struct nvmem_device *nvmem) } EXPORT_SYMBOL_GPL(nvmem_dev_name); +/** + * nvmem_dev_size() - Get the size of a given nvmem device. + * + * @nvmem: nvmem device. + * + * Return: size of the nvmem device. + */ +size_t nvmem_dev_size(struct nvmem_device *nvmem) +{ + return nvmem->size; +} +EXPORT_SYMBOL_GPL(nvmem_dev_size); + static int __init nvmem_init(void) { - return bus_register(&nvmem_bus_type); + int ret; + + ret = bus_register(&nvmem_bus_type); + if (ret) + return ret; + + ret = nvmem_layout_bus_register(); + if (ret) + bus_unregister(&nvmem_bus_type); + + return ret; } static void __exit nvmem_exit(void) { + nvmem_layout_bus_unregister(); bus_unregister(&nvmem_bus_type); } diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c index f1e202efaa..79dd4fda03 100644 --- a/drivers/nvmem/imx-ocotp.c +++ b/drivers/nvmem/imx-ocotp.c @@ -583,17 +583,12 @@ static const struct of_device_id imx_ocotp_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, imx_ocotp_dt_ids); -static void imx_ocotp_fixup_cell_info(struct nvmem_device *nvmem, - struct nvmem_layout *layout, - struct nvmem_cell_info *cell) +static void imx_ocotp_fixup_dt_cell_info(struct nvmem_device *nvmem, + struct nvmem_cell_info *cell) { cell->read_post_process = imx_ocotp_cell_pp; } -static struct nvmem_layout imx_ocotp_layout = { - .fixup_cell_info = imx_ocotp_fixup_cell_info, -}; - static int imx_ocotp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -619,7 +614,7 @@ static int imx_ocotp_probe(struct platform_device *pdev) imx_ocotp_nvmem_config.size = 4 * priv->params->nregs; imx_ocotp_nvmem_config.dev = dev; imx_ocotp_nvmem_config.priv = priv; - imx_ocotp_nvmem_config.layout = &imx_ocotp_layout; + imx_ocotp_nvmem_config.fixup_dt_cell_info = &imx_ocotp_fixup_dt_cell_info; priv->config = &imx_ocotp_nvmem_config; diff --git a/drivers/nvmem/internals.h b/drivers/nvmem/internals.h new file mode 100644 index 0000000000..18fed57270 --- /dev/null +++ b/drivers/nvmem/internals.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_NVMEM_INTERNALS_H +#define _LINUX_NVMEM_INTERNALS_H + +#include +#include +#include + +struct nvmem_device { + struct module *owner; + struct device dev; + struct list_head node; + int stride; + int word_size; + int id; + struct kref refcnt; + size_t size; + bool read_only; + bool root_only; + int flags; + enum nvmem_type type; + struct bin_attribute eeprom; + struct device *base_dev; + struct list_head cells; + void (*fixup_dt_cell_info)(struct nvmem_device *nvmem, + struct nvmem_cell_info *cell); + const struct nvmem_keepout *keepout; + unsigned int nkeepout; + nvmem_reg_read_t reg_read; + nvmem_reg_write_t reg_write; + struct gpio_desc *wp_gpio; + struct nvmem_layout *layout; + void *priv; + bool sysfs_cells_populated; +}; + +#if IS_ENABLED(CONFIG_OF) +int nvmem_layout_bus_register(void); +void nvmem_layout_bus_unregister(void); +int nvmem_populate_layout(struct nvmem_device *nvmem); +void nvmem_destroy_layout(struct nvmem_device *nvmem); +#else /* CONFIG_OF */ +static inline int nvmem_layout_bus_register(void) +{ + return 0; +} + +static inline void nvmem_layout_bus_unregister(void) {} + +static inline int nvmem_populate_layout(struct nvmem_device *nvmem) +{ + return 0; +} + +static inline void nvmem_destroy_layout(struct nvmem_device *nvmem) { } +#endif /* CONFIG_OF */ + +#endif /* ifndef _LINUX_NVMEM_INTERNALS_H */ diff --git a/drivers/nvmem/layouts.c b/drivers/nvmem/layouts.c new file mode 100644 index 0000000000..6a6aa58369 --- /dev/null +++ b/drivers/nvmem/layouts.c @@ -0,0 +1,201 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * NVMEM layout bus handling + * + * Copyright (C) 2023 Bootlin + * Author: Miquel Raynal +#include +#include +#include +#include +#include +#include + +#include "internals.h" + +#define to_nvmem_layout_driver(drv) \ + (container_of((drv), struct nvmem_layout_driver, driver)) +#define to_nvmem_layout_device(_dev) \ + container_of((_dev), struct nvmem_layout, dev) + +static int nvmem_layout_bus_match(struct device *dev, struct device_driver *drv) +{ + return of_driver_match_device(dev, drv); +} + +static int nvmem_layout_bus_probe(struct device *dev) +{ + struct nvmem_layout_driver *drv = to_nvmem_layout_driver(dev->driver); + struct nvmem_layout *layout = to_nvmem_layout_device(dev); + + if (!drv->probe || !drv->remove) + return -EINVAL; + + return drv->probe(layout); +} + +static void nvmem_layout_bus_remove(struct device *dev) +{ + struct nvmem_layout_driver *drv = to_nvmem_layout_driver(dev->driver); + struct nvmem_layout *layout = to_nvmem_layout_device(dev); + + return drv->remove(layout); +} + +static struct bus_type nvmem_layout_bus_type = { + .name = "nvmem-layout", + .match = nvmem_layout_bus_match, + .probe = nvmem_layout_bus_probe, + .remove = nvmem_layout_bus_remove, +}; + +int nvmem_layout_driver_register(struct nvmem_layout_driver *drv) +{ + drv->driver.bus = &nvmem_layout_bus_type; + + return driver_register(&drv->driver); +} +EXPORT_SYMBOL_GPL(nvmem_layout_driver_register); + +void nvmem_layout_driver_unregister(struct nvmem_layout_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL_GPL(nvmem_layout_driver_unregister); + +static void nvmem_layout_release_device(struct device *dev) +{ + struct nvmem_layout *layout = to_nvmem_layout_device(dev); + + of_node_put(layout->dev.of_node); + kfree(layout); +} + +static int nvmem_layout_create_device(struct nvmem_device *nvmem, + struct device_node *np) +{ + struct nvmem_layout *layout; + struct device *dev; + int ret; + + layout = kzalloc(sizeof(*layout), GFP_KERNEL); + if (!layout) + return -ENOMEM; + + /* Create a bidirectional link */ + layout->nvmem = nvmem; + nvmem->layout = layout; + + /* Device model registration */ + dev = &layout->dev; + device_initialize(dev); + dev->parent = &nvmem->dev; + dev->bus = &nvmem_layout_bus_type; + dev->release = nvmem_layout_release_device; + dev->coherent_dma_mask = DMA_BIT_MASK(32); + dev->dma_mask = &dev->coherent_dma_mask; + device_set_node(dev, of_fwnode_handle(of_node_get(np))); + of_device_make_bus_id(dev); + of_msi_configure(dev, dev->of_node); + + ret = device_add(dev); + if (ret) { + put_device(dev); + return ret; + } + + return 0; +} + +static const struct of_device_id of_nvmem_layout_skip_table[] = { + { .compatible = "fixed-layout", }, + {} +}; + +static int nvmem_layout_bus_populate(struct nvmem_device *nvmem, + struct device_node *layout_dn) +{ + int ret; + + /* Make sure it has a compatible property */ + if (!of_get_property(layout_dn, "compatible", NULL)) { + pr_debug("%s() - skipping %pOF, no compatible prop\n", + __func__, layout_dn); + return 0; + } + + /* Fixed layouts are parsed manually somewhere else for now */ + if (of_match_node(of_nvmem_layout_skip_table, layout_dn)) { + pr_debug("%s() - skipping %pOF node\n", __func__, layout_dn); + return 0; + } + + if (of_node_check_flag(layout_dn, OF_POPULATED_BUS)) { + pr_debug("%s() - skipping %pOF, already populated\n", + __func__, layout_dn); + + return 0; + } + + /* NVMEM layout buses expect only a single device representing the layout */ + ret = nvmem_layout_create_device(nvmem, layout_dn); + if (ret) + return ret; + + of_node_set_flag(layout_dn, OF_POPULATED_BUS); + + return 0; +} + +struct device_node *of_nvmem_layout_get_container(struct nvmem_device *nvmem) +{ + return of_get_child_by_name(nvmem->dev.of_node, "nvmem-layout"); +} +EXPORT_SYMBOL_GPL(of_nvmem_layout_get_container); + +/* + * Returns the number of devices populated, 0 if the operation was not relevant + * for this nvmem device, an error code otherwise. + */ +int nvmem_populate_layout(struct nvmem_device *nvmem) +{ + struct device_node *layout_dn; + int ret; + + layout_dn = of_nvmem_layout_get_container(nvmem); + if (!layout_dn) + return 0; + + /* Populate the layout device */ + device_links_supplier_sync_state_pause(); + ret = nvmem_layout_bus_populate(nvmem, layout_dn); + device_links_supplier_sync_state_resume(); + + of_node_put(layout_dn); + return ret; +} + +void nvmem_destroy_layout(struct nvmem_device *nvmem) +{ + struct device *dev; + + if (!nvmem->layout) + return; + + dev = &nvmem->layout->dev; + of_node_clear_flag(dev->of_node, OF_POPULATED_BUS); + device_unregister(dev); +} + +int nvmem_layout_bus_register(void) +{ + return bus_register(&nvmem_layout_bus_type); +} + +void nvmem_layout_bus_unregister(void) +{ + bus_unregister(&nvmem_layout_bus_type); +} diff --git a/drivers/nvmem/layouts/Kconfig b/drivers/nvmem/layouts/Kconfig index 7ff1ee1c1f..9c6e672fc3 100644 --- a/drivers/nvmem/layouts/Kconfig +++ b/drivers/nvmem/layouts/Kconfig @@ -1,5 +1,11 @@ # SPDX-License-Identifier: GPL-2.0 +config NVMEM_LAYOUTS + bool + depends on OF + +if NVMEM_LAYOUTS + menu "Layout Types" config NVMEM_LAYOUT_SL28_VPD @@ -21,3 +27,5 @@ config NVMEM_LAYOUT_ONIE_TLV If unsure, say N. endmenu + +endif diff --git a/drivers/nvmem/layouts/onie-tlv.c b/drivers/nvmem/layouts/onie-tlv.c index 59fc87ccfc..9d2ad5f2dc 100644 --- a/drivers/nvmem/layouts/onie-tlv.c +++ b/drivers/nvmem/layouts/onie-tlv.c @@ -182,9 +182,10 @@ static bool onie_tlv_crc_is_valid(struct device *dev, size_t table_len, u8 *tabl return true; } -static int onie_tlv_parse_table(struct device *dev, struct nvmem_device *nvmem, - struct nvmem_layout *layout) +static int onie_tlv_parse_table(struct nvmem_layout *layout) { + struct nvmem_device *nvmem = layout->nvmem; + struct device *dev = &layout->dev; struct onie_tlv_hdr hdr; size_t table_len, data_len, hdr_len; u8 *table, *data; @@ -226,16 +227,32 @@ static int onie_tlv_parse_table(struct device *dev, struct nvmem_device *nvmem, return 0; } +static int onie_tlv_probe(struct nvmem_layout *layout) +{ + layout->add_cells = onie_tlv_parse_table; + + return nvmem_layout_register(layout); +} + +static void onie_tlv_remove(struct nvmem_layout *layout) +{ + nvmem_layout_unregister(layout); +} + static const struct of_device_id onie_tlv_of_match_table[] = { { .compatible = "onie,tlv-layout", }, {}, }; MODULE_DEVICE_TABLE(of, onie_tlv_of_match_table); -static struct nvmem_layout onie_tlv_layout = { - .name = "ONIE tlv layout", - .of_match_table = onie_tlv_of_match_table, - .add_cells = onie_tlv_parse_table, +static struct nvmem_layout_driver onie_tlv_layout = { + .driver = { + .owner = THIS_MODULE, + .name = "onie-tlv-layout", + .of_match_table = onie_tlv_of_match_table, + }, + .probe = onie_tlv_probe, + .remove = onie_tlv_remove, }; module_nvmem_layout_driver(onie_tlv_layout); diff --git a/drivers/nvmem/layouts/sl28vpd.c b/drivers/nvmem/layouts/sl28vpd.c index 05671371f6..53fa50f17d 100644 --- a/drivers/nvmem/layouts/sl28vpd.c +++ b/drivers/nvmem/layouts/sl28vpd.c @@ -80,9 +80,10 @@ static int sl28vpd_v1_check_crc(struct device *dev, struct nvmem_device *nvmem) return 0; } -static int sl28vpd_add_cells(struct device *dev, struct nvmem_device *nvmem, - struct nvmem_layout *layout) +static int sl28vpd_add_cells(struct nvmem_layout *layout) { + struct nvmem_device *nvmem = layout->nvmem; + struct device *dev = &layout->dev; const struct nvmem_cell_info *pinfo; struct nvmem_cell_info info = {0}; struct device_node *layout_np; @@ -135,16 +136,32 @@ static int sl28vpd_add_cells(struct device *dev, struct nvmem_device *nvmem, return 0; } +static int sl28vpd_probe(struct nvmem_layout *layout) +{ + layout->add_cells = sl28vpd_add_cells; + + return nvmem_layout_register(layout); +} + +static void sl28vpd_remove(struct nvmem_layout *layout) +{ + nvmem_layout_unregister(layout); +} + static const struct of_device_id sl28vpd_of_match_table[] = { { .compatible = "kontron,sl28-vpd" }, {}, }; MODULE_DEVICE_TABLE(of, sl28vpd_of_match_table); -static struct nvmem_layout sl28vpd_layout = { - .name = "sl28-vpd", - .of_match_table = sl28vpd_of_match_table, - .add_cells = sl28vpd_add_cells, +static struct nvmem_layout_driver sl28vpd_layout = { + .driver = { + .owner = THIS_MODULE, + .name = "kontron-sl28vpd-layout", + .of_match_table = sl28vpd_of_match_table, + }, + .probe = sl28vpd_probe, + .remove = sl28vpd_remove, }; module_nvmem_layout_driver(sl28vpd_layout); diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c index 87c94686cf..84f05b40a4 100644 --- a/drivers/nvmem/mtk-efuse.c +++ b/drivers/nvmem/mtk-efuse.c @@ -45,9 +45,8 @@ static int mtk_efuse_gpu_speedbin_pp(void *context, const char *id, int index, return 0; } -static void mtk_efuse_fixup_cell_info(struct nvmem_device *nvmem, - struct nvmem_layout *layout, - struct nvmem_cell_info *cell) +static void mtk_efuse_fixup_dt_cell_info(struct nvmem_device *nvmem, + struct nvmem_cell_info *cell) { size_t sz = strlen(cell->name); @@ -61,10 +60,6 @@ static void mtk_efuse_fixup_cell_info(struct nvmem_device *nvmem, cell->read_post_process = mtk_efuse_gpu_speedbin_pp; } -static struct nvmem_layout mtk_efuse_layout = { - .fixup_cell_info = mtk_efuse_fixup_cell_info, -}; - static int mtk_efuse_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -91,7 +86,7 @@ static int mtk_efuse_probe(struct platform_device *pdev) econfig.priv = priv; econfig.dev = dev; if (pdata->uses_post_processing) - econfig.layout = &mtk_efuse_layout; + econfig.fixup_dt_cell_info = &mtk_efuse_fixup_dt_cell_info; nvmem = devm_nvmem_register(dev, &econfig); return PTR_ERR_OR_ZERO(nvmem); diff --git a/drivers/nvmem/stm32-romem.c b/drivers/nvmem/stm32-romem.c index 8a553b1799..82879b1c9e 100644 --- a/drivers/nvmem/stm32-romem.c +++ b/drivers/nvmem/stm32-romem.c @@ -269,6 +269,19 @@ static const struct stm32_romem_cfg stm32mp13_bsec_cfg = { .ta = true, }; +/* + * STM32MP25 BSEC OTP: 3 regions of 32-bits data words + * lower OTP (OTP0 to OTP127), bitwise (1-bit) programmable + * mid OTP (OTP128 to OTP255), bulk (32-bit) programmable + * upper OTP (OTP256 to OTP383), bulk (32-bit) programmable + * but no access to HWKEY and ECIES key: limited at OTP367 + */ +static const struct stm32_romem_cfg stm32mp25_bsec_cfg = { + .size = 368 * 4, + .lower = 127, + .ta = true, +}; + static const struct of_device_id stm32_romem_of_match[] __maybe_unused = { { .compatible = "st,stm32f4-otp", }, { .compatible = "st,stm32mp15-bsec", @@ -276,6 +289,9 @@ static const struct of_device_id stm32_romem_of_match[] __maybe_unused = { }, { .compatible = "st,stm32mp13-bsec", .data = (void *)&stm32mp13_bsec_cfg, + }, { + .compatible = "st,stm32mp25-bsec", + .data = (void *)&stm32mp25_bsec_cfg, }, { /* sentinel */ }, }; diff --git a/drivers/nvmem/u-boot-env.c b/drivers/nvmem/u-boot-env.c index c4ae94af4a..befbab156c 100644 --- a/drivers/nvmem/u-boot-env.c +++ b/drivers/nvmem/u-boot-env.c @@ -23,13 +23,10 @@ enum u_boot_env_format { struct u_boot_env { struct device *dev; + struct nvmem_device *nvmem; enum u_boot_env_format format; struct mtd_info *mtd; - - /* Cells */ - struct nvmem_cell_info *cells; - int ncells; }; struct u_boot_env_image_single { @@ -94,70 +91,71 @@ static int u_boot_env_read_post_process_ethaddr(void *context, const char *id, i static int u_boot_env_add_cells(struct u_boot_env *priv, uint8_t *buf, size_t data_offset, size_t data_len) { + struct nvmem_device *nvmem = priv->nvmem; struct device *dev = priv->dev; char *data = buf + data_offset; char *var, *value, *eq; - int idx; - - priv->ncells = 0; - for (var = data; var < data + data_len && *var; var += strlen(var) + 1) - priv->ncells++; - - priv->cells = devm_kcalloc(dev, priv->ncells, sizeof(*priv->cells), GFP_KERNEL); - if (!priv->cells) - return -ENOMEM; - for (var = data, idx = 0; + for (var = data; var < data + data_len && *var; - var = value + strlen(value) + 1, idx++) { + var = value + strlen(value) + 1) { + struct nvmem_cell_info info = {}; + eq = strchr(var, '='); if (!eq) break; *eq = '\0'; value = eq + 1; - priv->cells[idx].name = devm_kstrdup(dev, var, GFP_KERNEL); - if (!priv->cells[idx].name) + info.name = devm_kstrdup(dev, var, GFP_KERNEL); + if (!info.name) return -ENOMEM; - priv->cells[idx].offset = data_offset + value - data; - priv->cells[idx].bytes = strlen(value); - priv->cells[idx].np = of_get_child_by_name(dev->of_node, priv->cells[idx].name); + info.offset = data_offset + value - data; + info.bytes = strlen(value); + info.np = of_get_child_by_name(dev->of_node, info.name); if (!strcmp(var, "ethaddr")) { - priv->cells[idx].raw_len = strlen(value); - priv->cells[idx].bytes = ETH_ALEN; - priv->cells[idx].read_post_process = u_boot_env_read_post_process_ethaddr; + info.raw_len = strlen(value); + info.bytes = ETH_ALEN; + info.read_post_process = u_boot_env_read_post_process_ethaddr; } - } - if (WARN_ON(idx != priv->ncells)) - priv->ncells = idx; + nvmem_add_one_cell(nvmem, &info); + } return 0; } static int u_boot_env_parse(struct u_boot_env *priv) { + struct nvmem_device *nvmem = priv->nvmem; struct device *dev = priv->dev; size_t crc32_data_offset; size_t crc32_data_len; size_t crc32_offset; + __le32 *crc32_addr; size_t data_offset; size_t data_len; + size_t dev_size; uint32_t crc32; uint32_t calc; - size_t bytes; uint8_t *buf; + int bytes; int err; - buf = kcalloc(1, priv->mtd->size, GFP_KERNEL); + dev_size = nvmem_dev_size(nvmem); + + buf = kzalloc(dev_size, GFP_KERNEL); if (!buf) { err = -ENOMEM; goto err_out; } - err = mtd_read(priv->mtd, 0, priv->mtd->size, &bytes, buf); - if ((err && !mtd_is_bitflip(err)) || bytes != priv->mtd->size) { - dev_err(dev, "Failed to read from mtd: %d\n", err); + bytes = nvmem_device_read(nvmem, 0, dev_size, buf); + if (bytes < 0) { + err = bytes; + goto err_kfree; + } else if (bytes != dev_size) { + err = -EIO; goto err_kfree; } @@ -178,9 +176,10 @@ static int u_boot_env_parse(struct u_boot_env *priv) data_offset = offsetof(struct u_boot_env_image_broadcom, data); break; } - crc32 = le32_to_cpu(*(__le32 *)(buf + crc32_offset)); - crc32_data_len = priv->mtd->size - crc32_data_offset; - data_len = priv->mtd->size - data_offset; + crc32_addr = (__le32 *)(buf + crc32_offset); + crc32 = le32_to_cpu(*crc32_addr); + crc32_data_len = dev_size - crc32_data_offset; + data_len = dev_size - data_offset; calc = crc32(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L; if (calc != crc32) { @@ -189,10 +188,8 @@ static int u_boot_env_parse(struct u_boot_env *priv) goto err_kfree; } - buf[priv->mtd->size - 1] = '\0'; + buf[dev_size - 1] = '\0'; err = u_boot_env_add_cells(priv, buf, data_offset, data_len); - if (err) - dev_err(dev, "Failed to add cells: %d\n", err); err_kfree: kfree(buf); @@ -209,7 +206,6 @@ static int u_boot_env_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct u_boot_env *priv; - int err; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) @@ -224,17 +220,15 @@ static int u_boot_env_probe(struct platform_device *pdev) return PTR_ERR(priv->mtd); } - err = u_boot_env_parse(priv); - if (err) - return err; - config.dev = dev; - config.cells = priv->cells; - config.ncells = priv->ncells; config.priv = priv; config.size = priv->mtd->size; - return PTR_ERR_OR_ZERO(devm_nvmem_register(dev, &config)); + priv->nvmem = devm_nvmem_register(dev, &config); + if (IS_ERR(priv->nvmem)) + return PTR_ERR(priv->nvmem); + + return u_boot_env_parse(priv); } static const struct of_device_id u_boot_env_of_match_table[] = { -- cgit v1.2.3