// SPDX-License-Identifier: GPL-2.0 /* * Freescale Management Complex (MC) bus driver * * Copyright (C) 2014-2016 Freescale Semiconductor, Inc. * Copyright 2019-2020 NXP * Author: German Rivera <[email protected]> * */ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/of_device.h> #include <linux/of_address.h> #include <linux/ioport.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/limits.h> #include <linux/bitops.h> #include <linux/dma-mapping.h> #include <linux/acpi.h> #include <linux/iommu.h> #include <linux/dma-map-ops.h> #include "fsl-mc-private.h" /* * Default DMA mask for devices on a fsl-mc bus */ #define FSL_MC_DEFAULT_DMA_MASK … static struct fsl_mc_version mc_version; /** * struct fsl_mc - Private data of a "fsl,qoriq-mc" platform device * @root_mc_bus_dev: fsl-mc device representing the root DPRC * @num_translation_ranges: number of entries in addr_translation_ranges * @translation_ranges: array of bus to system address translation ranges * @fsl_mc_regs: base address of register bank */ struct fsl_mc { … }; /** * struct fsl_mc_addr_translation_range - bus to system address translation * range * @mc_region_type: Type of MC region for the range being translated * @start_mc_offset: Start MC offset of the range being translated * @end_mc_offset: MC offset of the first byte after the range (last MC * offset of the range is end_mc_offset - 1) * @start_phys_addr: system physical address corresponding to start_mc_addr */ struct fsl_mc_addr_translation_range { … }; #define FSL_MC_GCR1 … #define GCR1_P1_STOP … #define GCR1_P2_STOP … #define FSL_MC_FAPR … #define MC_FAPR_PL … #define MC_FAPR_BMT … static phys_addr_t mc_portal_base_phys_addr; /** * fsl_mc_bus_match - device to driver matching callback * @dev: the fsl-mc device to match against * @drv: the device driver to search for matching fsl-mc object type * structures * * Returns 1 on success, 0 otherwise. */ static int fsl_mc_bus_match(struct device *dev, const struct device_driver *drv) { … } /* * fsl_mc_bus_uevent - callback invoked when a device is added */ static int fsl_mc_bus_uevent(const struct device *dev, struct kobj_uevent_env *env) { … } static int fsl_mc_dma_configure(struct device *dev) { … } static void fsl_mc_dma_cleanup(struct device *dev) { … } static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(modalias); static ssize_t driver_override_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t driver_override_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RW(driver_override); static struct attribute *fsl_mc_dev_attrs[] = …; ATTRIBUTE_GROUPS(…); static int scan_fsl_mc_bus(struct device *dev, void *data) { … } static ssize_t rescan_store(const struct bus_type *bus, const char *buf, size_t count) { … } static BUS_ATTR_WO(rescan); static int fsl_mc_bus_set_autorescan(struct device *dev, void *data) { … } static int fsl_mc_bus_get_autorescan(struct device *dev, void *data) { … } static ssize_t autorescan_store(const struct bus_type *bus, const char *buf, size_t count) { … } static ssize_t autorescan_show(const struct bus_type *bus, char *buf) { … } static BUS_ATTR_RW(autorescan); static struct attribute *fsl_mc_bus_attrs[] = …; ATTRIBUTE_GROUPS(…); struct bus_type fsl_mc_bus_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dprc_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpni_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpio_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpsw_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpbp_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpcon_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpmcp_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpmac_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dprtc_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpseci_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpdmux_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpdcei_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpaiop_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpci_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpdmai_type = …; EXPORT_SYMBOL_GPL(…); struct device_type fsl_mc_bus_dpdbg_type = …; EXPORT_SYMBOL_GPL(…); static struct device_type *fsl_mc_get_device_type(const char *type) { … } static int fsl_mc_driver_probe(struct device *dev) { … } static int fsl_mc_driver_remove(struct device *dev) { … } static void fsl_mc_driver_shutdown(struct device *dev) { … } /* * __fsl_mc_driver_register - registers a child device driver with the * MC bus * * This function is implicitly invoked from the registration function of * fsl_mc device drivers, which is generated by the * module_fsl_mc_driver() macro. */ int __fsl_mc_driver_register(struct fsl_mc_driver *mc_driver, struct module *owner) { … } EXPORT_SYMBOL_GPL(…); /* * fsl_mc_driver_unregister - unregisters a device driver from the * MC bus */ void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver) { … } EXPORT_SYMBOL_GPL(…); /** * mc_get_version() - Retrieves the Management Complex firmware * version information * @mc_io: Pointer to opaque I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' * @mc_ver_info: Returned version information structure * * Return: '0' on Success; Error code otherwise. */ static int mc_get_version(struct fsl_mc_io *mc_io, u32 cmd_flags, struct fsl_mc_version *mc_ver_info) { … } /** * fsl_mc_get_version - function to retrieve the MC f/w version information * * Return: mc version when called after fsl-mc-bus probe; NULL otherwise. */ struct fsl_mc_version *fsl_mc_get_version(void) { … } EXPORT_SYMBOL_GPL(…); /* * fsl_mc_get_root_dprc - function to traverse to the root dprc */ void fsl_mc_get_root_dprc(struct device *dev, struct device **root_dprc_dev) { … } static int get_dprc_attr(struct fsl_mc_io *mc_io, int container_id, struct dprc_attributes *attr) { … } static int get_dprc_icid(struct fsl_mc_io *mc_io, int container_id, u32 *icid) { … } static int translate_mc_addr(struct fsl_mc_device *mc_dev, enum dprc_region_type mc_region_type, u64 mc_offset, phys_addr_t *phys_addr) { … } static int fsl_mc_device_get_mmio_regions(struct fsl_mc_device *mc_dev, struct fsl_mc_device *mc_bus_dev) { … } /* * fsl_mc_is_root_dprc - function to check if a given device is a root dprc */ bool fsl_mc_is_root_dprc(struct device *dev) { … } static void fsl_mc_device_release(struct device *dev) { … } /* * Add a newly discovered fsl-mc device to be visible in Linux */ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc, struct fsl_mc_io *mc_io, struct device *parent_dev, struct fsl_mc_device **new_mc_dev) { … } EXPORT_SYMBOL_GPL(…); static struct notifier_block fsl_mc_nb; /** * fsl_mc_device_remove - Remove an fsl-mc device from being visible to * Linux * * @mc_dev: Pointer to an fsl-mc device */ void fsl_mc_device_remove(struct fsl_mc_device *mc_dev) { … } EXPORT_SYMBOL_GPL(…); struct fsl_mc_device *fsl_mc_get_endpoint(struct fsl_mc_device *mc_dev, u16 if_id) { … } EXPORT_SYMBOL_GPL(…); static int get_mc_addr_translation_ranges(struct device *dev, struct fsl_mc_addr_translation_range **ranges, u8 *num_ranges) { … } /* * fsl_mc_bus_probe - callback invoked when the root MC bus is being * added */ static int fsl_mc_bus_probe(struct platform_device *pdev) { … } /* * fsl_mc_bus_remove - callback invoked when the root MC bus is being * removed */ static void fsl_mc_bus_remove(struct platform_device *pdev) { … } static const struct of_device_id fsl_mc_bus_match_table[] = …; MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table); static const struct acpi_device_id fsl_mc_bus_acpi_match_table[] = …; MODULE_DEVICE_TABLE(acpi, fsl_mc_bus_acpi_match_table); static struct platform_driver fsl_mc_bus_driver = …; static int fsl_mc_bus_notifier(struct notifier_block *nb, unsigned long action, void *data) { … } static struct notifier_block fsl_mc_nb = …; static int __init fsl_mc_bus_driver_init(void) { … } postcore_initcall(fsl_mc_bus_driver_init);
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