OwlCyberSecurity - MANAGER

Edit File: coresight.h

/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (c) 2012, The Linux Foundation. All rights reserved. */ #ifndef _LINUX_CORESIGHT_H #define _LINUX_CORESIGHT_H #include <linux/device.h> #include <linux/perf_event.h> #include <linux/sched.h> /* Peripheral id registers (0xFD0-0xFEC) */ #define CORESIGHT_PERIPHIDR4 0xfd0 #define CORESIGHT_PERIPHIDR5 0xfd4 #define CORESIGHT_PERIPHIDR6 0xfd8 #define CORESIGHT_PERIPHIDR7 0xfdC #define CORESIGHT_PERIPHIDR0 0xfe0 #define CORESIGHT_PERIPHIDR1 0xfe4 #define CORESIGHT_PERIPHIDR2 0xfe8 #define CORESIGHT_PERIPHIDR3 0xfeC /* Component id registers (0xFF0-0xFFC) */ #define CORESIGHT_COMPIDR0 0xff0 #define CORESIGHT_COMPIDR1 0xff4 #define CORESIGHT_COMPIDR2 0xff8 #define CORESIGHT_COMPIDR3 0xffC #define ETM_ARCH_V3_3 0x23 #define ETM_ARCH_V3_5 0x25 #define PFT_ARCH_V1_0 0x30 #define PFT_ARCH_V1_1 0x31 #define CORESIGHT_UNLOCK 0xc5acce55 extern struct bus_type coresight_bustype; enum coresight_dev_type { CORESIGHT_DEV_TYPE_NONE, CORESIGHT_DEV_TYPE_SINK, CORESIGHT_DEV_TYPE_LINK, CORESIGHT_DEV_TYPE_LINKSINK, CORESIGHT_DEV_TYPE_SOURCE, CORESIGHT_DEV_TYPE_HELPER, }; enum coresight_dev_subtype_sink { CORESIGHT_DEV_SUBTYPE_SINK_NONE, CORESIGHT_DEV_SUBTYPE_SINK_PORT, CORESIGHT_DEV_SUBTYPE_SINK_BUFFER, }; enum coresight_dev_subtype_link { CORESIGHT_DEV_SUBTYPE_LINK_NONE, CORESIGHT_DEV_SUBTYPE_LINK_MERG, CORESIGHT_DEV_SUBTYPE_LINK_SPLIT, CORESIGHT_DEV_SUBTYPE_LINK_FIFO, }; enum coresight_dev_subtype_source { CORESIGHT_DEV_SUBTYPE_SOURCE_NONE, CORESIGHT_DEV_SUBTYPE_SOURCE_PROC, CORESIGHT_DEV_SUBTYPE_SOURCE_BUS, CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE, }; enum coresight_dev_subtype_helper { CORESIGHT_DEV_SUBTYPE_HELPER_NONE, CORESIGHT_DEV_SUBTYPE_HELPER_CATU, }; /** * union coresight_dev_subtype - further characterisation of a type * @sink_subtype: type of sink this component is, as defined * by @coresight_dev_subtype_sink. * @link_subtype: type of link this component is, as defined * by @coresight_dev_subtype_link. * @source_subtype: type of source this component is, as defined * by @coresight_dev_subtype_source. * @helper_subtype: type of helper this component is, as defined * by @coresight_dev_subtype_helper. */ union coresight_dev_subtype { /* We have some devices which acts as LINK and SINK */ struct { enum coresight_dev_subtype_sink sink_subtype; enum coresight_dev_subtype_link link_subtype; }; enum coresight_dev_subtype_source source_subtype; enum coresight_dev_subtype_helper helper_subtype; }; /** * struct coresight_platform_data - data harvested from the DT specification * @nr_inport: number of input ports for this component. * @nr_outport: number of output ports for this component. * @conns: Array of nr_outport connections from this component */ struct coresight_platform_data { int nr_inport; int nr_outport; struct coresight_connection *conns; }; /** * struct coresight_desc - description of a component required from drivers * @type: as defined by @coresight_dev_type. * @subtype: as defined by @coresight_dev_subtype. * @ops: generic operations for this component, as defined * by @coresight_ops. * @pdata: platform data collected from DT. * @dev: The device entity associated to this component. * @groups: operations specific to this component. These will end up * in the component's sysfs sub-directory. * @name: name for the coresight device, also shown under sysfs. */ struct coresight_desc { enum coresight_dev_type type; union coresight_dev_subtype subtype; const struct coresight_ops *ops; struct coresight_platform_data *pdata; struct device *dev; const struct attribute_group **groups; const char *name; }; /** * struct coresight_connection - representation of a single connection * @outport: a connection's output port number. * @child_port: remote component's port number @output is connected to. * @chid_fwnode: remote component's fwnode handle. * @child_dev: a @coresight_device representation of the component connected to @outport. */ struct coresight_connection { int outport; int child_port; struct fwnode_handle *child_fwnode; struct coresight_device *child_dev; }; /** * struct coresight_device - representation of a device as used by the framework * @pdata: Platform data with device connections associated to this device. * @type: as defined by @coresight_dev_type. * @subtype: as defined by @coresight_dev_subtype. * @ops: generic operations for this component, as defined by @coresight_ops. * @dev: The device entity associated to this component. * @refcnt: keep track of what is in use. * @orphan: true if the component has connections that haven't been linked. * @enable: 'true' if component is currently part of an active path. * @activated: 'true' only if a _sink_ has been activated. A sink can be * activated but not yet enabled. Enabling for a _sink_ * appens when a source has been selected for that it. * @ea: Device attribute for sink representation under PMU directory. */ struct coresight_device { struct coresight_platform_data *pdata; enum coresight_dev_type type; union coresight_dev_subtype subtype; const struct coresight_ops *ops; struct device dev; atomic_t *refcnt; bool orphan; bool enable; /* true only if configured as part of a path */ /* sink specific fields */ bool activated; /* true only if a sink is part of a path */ struct dev_ext_attribute *ea; }; /* * coresight_dev_list - Mapping for devices to "name" index for device * names. * * @nr_idx: Number of entries already allocated. * @pfx: Prefix pattern for device name. * @fwnode_list: Array of fwnode_handles associated with each allocated * index, upto nr_idx entries. */ struct coresight_dev_list { int nr_idx; const char *pfx; struct fwnode_handle **fwnode_list; }; #define DEFINE_CORESIGHT_DEVLIST(var, dev_pfx) \ static struct coresight_dev_list (var) = { \ .pfx = dev_pfx, \ .nr_idx = 0, \ .fwnode_list = NULL, \ } #define to_coresight_device(d) container_of(d, struct coresight_device, dev) #define source_ops(csdev) csdev->ops->source_ops #define sink_ops(csdev) csdev->ops->sink_ops #define link_ops(csdev) csdev->ops->link_ops #define helper_ops(csdev) csdev->ops->helper_ops /** * struct coresight_ops_sink - basic operations for a sink * Operations available for sinks * @enable: enables the sink. * @disable: disables the sink. * @alloc_buffer: initialises perf's ring buffer for trace collection. * @free_buffer: release memory allocated in @get_config. * @update_buffer: update buffer pointers after a trace session. */ struct coresight_ops_sink { int (*enable)(struct coresight_device *csdev, u32 mode, void *data); int (*disable)(struct coresight_device *csdev); void *(*alloc_buffer)(struct coresight_device *csdev, struct perf_event *event, void **pages, int nr_pages, bool overwrite); void (*free_buffer)(void *config); unsigned long (*update_buffer)(struct coresight_device *csdev, struct perf_output_handle *handle, void *sink_config); }; /** * struct coresight_ops_link - basic operations for a link * Operations available for links. * @enable: enables flow between iport and oport. * @disable: disables flow between iport and oport. */ struct coresight_ops_link { int (*enable)(struct coresight_device *csdev, int iport, int oport); void (*disable)(struct coresight_device *csdev, int iport, int oport); }; /** * struct coresight_ops_source - basic operations for a source * Operations available for sources. * @cpu_id: returns the value of the CPU number this component * is associated to. * @trace_id: returns the value of the component's trace ID as known * to the HW. * @enable: enables tracing for a source. * @disable: disables tracing for a source. */ struct coresight_ops_source { int (*cpu_id)(struct coresight_device *csdev); int (*trace_id)(struct coresight_device *csdev); int (*enable)(struct coresight_device *csdev, struct perf_event *event, u32 mode); void (*disable)(struct coresight_device *csdev, struct perf_event *event); }; /** * struct coresight_ops_helper - Operations for a helper device. * * All operations could pass in a device specific data, which could * help the helper device to determine what to do. * * @enable : Enable the device * @disable : Disable the device */ struct coresight_ops_helper { int (*enable)(struct coresight_device *csdev, void *data); int (*disable)(struct coresight_device *csdev, void *data); }; struct coresight_ops { const struct coresight_ops_sink *sink_ops; const struct coresight_ops_link *link_ops; const struct coresight_ops_source *source_ops; const struct coresight_ops_helper *helper_ops; }; #ifdef CONFIG_CORESIGHT extern struct coresight_device * coresight_register(struct coresight_desc *desc); extern void coresight_unregister(struct coresight_device *csdev); extern int coresight_enable(struct coresight_device *csdev); extern void coresight_disable(struct coresight_device *csdev); extern int coresight_timeout(void __iomem *addr, u32 offset, int position, int value); extern int coresight_claim_device(void __iomem *base); extern int coresight_claim_device_unlocked(void __iomem *base); extern void coresight_disclaim_device(void __iomem *base); extern void coresight_disclaim_device_unlocked(void __iomem *base); extern char *coresight_alloc_device_name(struct coresight_dev_list *devs, struct device *dev); #else static inline struct coresight_device * coresight_register(struct coresight_desc *desc) { return NULL; } static inline void coresight_unregister(struct coresight_device *csdev) {} static inline int coresight_enable(struct coresight_device *csdev) { return -ENOSYS; } static inline void coresight_disable(struct coresight_device *csdev) {} static inline int coresight_timeout(void __iomem *addr, u32 offset, int position, int value) { return 1; } static inline int coresight_claim_device_unlocked(void __iomem *base) { return -EINVAL; } static inline int coresight_claim_device(void __iomem *base) { return -EINVAL; } static inline void coresight_disclaim_device(void __iomem *base) {} static inline void coresight_disclaim_device_unlocked(void __iomem *base) {} #endif extern int coresight_get_cpu(struct device *dev); struct coresight_platform_data *coresight_get_platform_data(struct device *dev); #endif