2 * Intel(R) Trace Hub data structures
4 * Copyright (C) 2014-2015 Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 #ifndef __INTEL_TH_H__
17 #define __INTEL_TH_H__
19 /* intel_th_device device types */
21 /* Devices that generate trace data */
23 /* Output ports (MSC, PTI) */
25 /* Switch, the Global Trace Hub (GTH) */
30 * struct intel_th_output - descriptor INTEL_TH_OUTPUT type devices
31 * @port: output port number, assigned by the switch
32 * @type: GTH_{MSU,CTP,PTI}
33 * @scratchpad: scratchpad bits to flag when this output is enabled
34 * @multiblock: true for multiblock output configuration
35 * @active: true when this output is enabled
37 * Output port descriptor, used by switch driver to tell which output
38 * port this output device corresponds to. Filled in at output device's
39 * probe time by switch::assign(). Passed from output device driver to
40 * switch related code to enable/disable its port.
42 struct intel_th_output {
45 unsigned int scratchpad;
51 * struct intel_th_device - device on the intel_th bus
53 * @resource: array of resources available to this device
54 * @num_resources: number of resources in @resource array
55 * @type: INTEL_TH_{SOURCE,OUTPUT,SWITCH}
56 * @id: device instance or -1
57 * @host_mode: Intel TH is controlled by an external debug host
58 * @output: output descriptor for INTEL_TH_OUTPUT devices
59 * @name: device name to match the driver
61 struct intel_th_device {
63 struct resource *resource;
64 unsigned int num_resources;
68 /* INTEL_TH_SWITCH specific */
71 /* INTEL_TH_OUTPUT specific */
72 struct intel_th_output output;
77 #define to_intel_th_device(_d) \
78 container_of((_d), struct intel_th_device, dev)
81 * intel_th_device_get_resource() - obtain @num'th resource of type @type
82 * @thdev: the device to search the resource for
83 * @type: resource type
84 * @num: number of the resource
86 static inline struct resource *
87 intel_th_device_get_resource(struct intel_th_device *thdev, unsigned int type,
92 for (i = 0; i < thdev->num_resources; i++)
93 if (resource_type(&thdev->resource[i]) == type && !num--)
94 return &thdev->resource[i];
100 * intel_th_output_assigned() - if an output device is assigned to a switch port
101 * @thdev: the output device
103 * Return: true if the device is INTEL_TH_OUTPUT *and* is assigned a port
106 intel_th_output_assigned(struct intel_th_device *thdev)
108 return thdev->type == INTEL_TH_OUTPUT &&
109 thdev->output.port >= 0;
113 * struct intel_th_driver - driver for an intel_th_device device
114 * @driver: generic driver
115 * @probe: probe method
116 * @remove: remove method
117 * @assign: match a given output type device against available outputs
118 * @unassign: deassociate an output type device from an output port
119 * @enable: enable tracing for a given output device
120 * @disable: disable tracing for a given output device
121 * @irq: interrupt callback
122 * @activate: enable tracing on the output's side
123 * @deactivate: disable tracing on the output's side
124 * @fops: file operations for device nodes
125 * @attr_group: attributes provided by the driver
127 * Callbacks @probe and @remove are required for all device types.
128 * Switch device driver needs to fill in @assign, @enable and @disable
131 struct intel_th_driver {
132 struct device_driver driver;
133 int (*probe)(struct intel_th_device *thdev);
134 void (*remove)(struct intel_th_device *thdev);
135 /* switch (GTH) ops */
136 int (*assign)(struct intel_th_device *thdev,
137 struct intel_th_device *othdev);
138 void (*unassign)(struct intel_th_device *thdev,
139 struct intel_th_device *othdev);
140 void (*enable)(struct intel_th_device *thdev,
141 struct intel_th_output *output);
142 void (*disable)(struct intel_th_device *thdev,
143 struct intel_th_output *output);
145 void (*irq)(struct intel_th_device *thdev);
146 int (*activate)(struct intel_th_device *thdev);
147 void (*deactivate)(struct intel_th_device *thdev);
148 /* file_operations for those who want a device node */
149 const struct file_operations *fops;
150 /* optional attributes */
151 struct attribute_group *attr_group;
154 int (*set_output)(struct intel_th_device *thdev,
155 unsigned int master);
158 #define to_intel_th_driver(_d) \
159 container_of((_d), struct intel_th_driver, driver)
161 #define to_intel_th_driver_or_null(_d) \
162 ((_d) ? to_intel_th_driver(_d) : NULL)
164 static inline struct intel_th_device *
165 to_intel_th_hub(struct intel_th_device *thdev)
167 struct device *parent = thdev->dev.parent;
172 return to_intel_th_device(parent);
176 intel_th_alloc(struct device *dev, struct resource *devres,
177 unsigned int ndevres, int irq);
178 void intel_th_free(struct intel_th *th);
180 int intel_th_driver_register(struct intel_th_driver *thdrv);
181 void intel_th_driver_unregister(struct intel_th_driver *thdrv);
183 int intel_th_trace_enable(struct intel_th_device *thdev);
184 int intel_th_trace_disable(struct intel_th_device *thdev);
185 int intel_th_set_output(struct intel_th_device *thdev,
186 unsigned int master);
194 #define TH_SUBDEVICE_MAX 6
195 #define TH_POSSIBLE_OUTPUTS 8
196 #define TH_CONFIGURABLE_MASTERS 256
200 * struct intel_th - Intel TH controller
201 * @dev: driver core's device
203 * @hub: "switch" subdevice (GTH)
204 * @id: this Intel TH controller's device ID in the system
205 * @major: device node major for output devices
210 struct intel_th_device *thdev[TH_SUBDEVICE_MAX];
211 struct intel_th_device *hub;
215 #ifdef CONFIG_MODULES
216 struct work_struct request_module_work;
217 #endif /* CONFIG_MODULES */
218 #ifdef CONFIG_INTEL_TH_DEBUG
227 /* Global Trace Hub (GTH) */
228 REG_GTH_OFFSET = 0x0000,
229 REG_GTH_LENGTH = 0x2000,
231 /* Software Trace Hub (STH) [0x4000..0x4fff] */
232 REG_STH_OFFSET = 0x4000,
233 REG_STH_LENGTH = 0x2000,
235 /* Memory Storage Unit (MSU) [0xa0000..0xa1fff] */
236 REG_MSU_OFFSET = 0xa0000,
237 REG_MSU_LENGTH = 0x02000,
239 /* Internal MSU trace buffer [0x80000..0x9ffff] */
240 BUF_MSU_OFFSET = 0x80000,
241 BUF_MSU_LENGTH = 0x20000,
243 /* PTI output == same window as GTH */
244 REG_PTI_OFFSET = REG_GTH_OFFSET,
245 REG_PTI_LENGTH = REG_GTH_LENGTH,
247 /* DCI Handler (DCIH) == some window as MSU */
248 REG_DCIH_OFFSET = REG_MSU_OFFSET,
249 REG_DCIH_LENGTH = REG_MSU_LENGTH,
253 * GTH, output ports configuration
257 GTH_MSU, /* memory/usb */
258 GTH_CTP, /* Common Trace Port */
259 GTH_PTI = 4, /* MIPI-PTI */
263 * Scratchpad bits: tell firmware and external debuggers
267 /* Memory is the primary destination */
268 SCRPD_MEM_IS_PRIM_DEST = BIT(0),
269 /* XHCI DbC is the primary destination */
270 SCRPD_DBC_IS_PRIM_DEST = BIT(1),
271 /* PTI is the primary destination */
272 SCRPD_PTI_IS_PRIM_DEST = BIT(2),
273 /* BSSB is the primary destination */
274 SCRPD_BSSB_IS_PRIM_DEST = BIT(3),
275 /* PTI is the alternate destination */
276 SCRPD_PTI_IS_ALT_DEST = BIT(4),
277 /* BSSB is the alternate destination */
278 SCRPD_BSSB_IS_ALT_DEST = BIT(5),
279 /* DeepSx exit occurred */
280 SCRPD_DEEPSX_EXIT = BIT(6),
281 /* S4 exit occurred */
282 SCRPD_S4_EXIT = BIT(7),
283 /* S5 exit occurred */
284 SCRPD_S5_EXIT = BIT(8),
285 /* MSU controller 0/1 is enabled */
286 SCRPD_MSC0_IS_ENABLED = BIT(9),
287 SCRPD_MSC1_IS_ENABLED = BIT(10),
288 /* Sx exit occurred */
289 SCRPD_SX_EXIT = BIT(11),
290 /* Trigger Unit is enabled */
291 SCRPD_TRIGGER_IS_ENABLED = BIT(12),
292 SCRPD_ODLA_IS_ENABLED = BIT(13),
293 SCRPD_SOCHAP_IS_ENABLED = BIT(14),
294 SCRPD_STH_IS_ENABLED = BIT(15),
295 SCRPD_DCIH_IS_ENABLED = BIT(16),
296 SCRPD_VER_IS_ENABLED = BIT(17),
297 /* External debugger is using Intel TH */
298 SCRPD_DEBUGGER_IN_USE = BIT(24),