3 * (C) COPYRIGHT 2010-2016 ARM Limited. All rights reserved.
5 * This program is free software and is provided to you under the terms of the
6 * GNU General Public License version 2 as published by the Free Software
7 * Foundation, and any use by you of this program is subject to the terms
10 * A copy of the licence is included with the program, and can also be obtained
11 * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
12 * Boston, MA 02110-1301, USA.
21 * @file mali_kbase_config.h
22 * Configuration API and Attributes for KBase
25 #ifndef _KBASE_CONFIG_H_
26 #define _KBASE_CONFIG_H_
30 #include <mali_malisw.h>
31 #include <mali_kbase_backend_config.h>
34 * @addtogroup base_api
39 * @addtogroup base_kbase_api
44 * @addtogroup kbase_config Configuration API and Attributes
48 #include <linux/rbtree.h>
50 /* Forward declaration of struct kbase_device */
54 * kbase_platform_funcs_conf - Specifies platform init/term function pointers
56 * Specifies the functions pointers for platform specific initialization and
57 * termination. By default no functions are required. No additional platform
58 * specific control is necessary.
60 struct kbase_platform_funcs_conf {
62 * platform_init_func - platform specific init function pointer
63 * @kbdev - kbase_device pointer
65 * Returns 0 on success, negative error code otherwise.
67 * Function pointer for platform specific initialization or NULL if no
68 * initialization function is required. At the point this the GPU is
69 * not active and its power and clocks are in unknown (platform specific
70 * state) as kbase doesn't yet have control of power and clocks.
72 * The platform specific private pointer kbase_device::platform_context
73 * can be accessed (and possibly initialized) in here.
75 int (*platform_init_func)(struct kbase_device *kbdev);
77 * platform_term_func - platform specific termination function pointer
78 * @kbdev - kbase_device pointer
80 * Function pointer for platform specific termination or NULL if no
81 * termination function is required. At the point this the GPU will be
82 * idle but still powered and clocked.
84 * The platform specific private pointer kbase_device::platform_context
85 * can be accessed (and possibly terminated) in here.
87 void (*platform_term_func)(struct kbase_device *kbdev);
91 * @brief Specifies the callbacks for power management
93 * By default no callbacks will be made and the GPU must not be powered off.
95 struct kbase_pm_callback_conf {
96 /** Callback for when the GPU is idle and the power to it can be switched off.
98 * The system integrator can decide whether to either do nothing, just switch off
99 * the clocks to the GPU, or to completely power down the GPU.
100 * The platform specific private pointer kbase_device::platform_context can be accessed and modified in here. It is the
101 * platform \em callbacks responsibility to initialize and terminate this pointer if used (see @ref kbase_platform_funcs_conf).
103 void (*power_off_callback)(struct kbase_device *kbdev);
105 /** Callback for when the GPU is about to become active and power must be supplied.
107 * This function must not return until the GPU is powered and clocked sufficiently for register access to
108 * succeed. The return value specifies whether the GPU was powered down since the call to power_off_callback.
109 * If the GPU state has been lost then this function must return 1, otherwise it should return 0.
110 * The platform specific private pointer kbase_device::platform_context can be accessed and modified in here. It is the
111 * platform \em callbacks responsibility to initialize and terminate this pointer if used (see @ref kbase_platform_funcs_conf).
113 * The return value of the first call to this function is ignored.
115 * @return 1 if the GPU state may have been lost, 0 otherwise.
117 int (*power_on_callback)(struct kbase_device *kbdev);
119 /** Callback for when the system is requesting a suspend and GPU power
120 * must be switched off.
122 * Note that if this callback is present, then this may be called
123 * without a preceding call to power_off_callback. Therefore this
124 * callback must be able to take any action that might otherwise happen
125 * in power_off_callback.
127 * The platform specific private pointer kbase_device::platform_context
128 * can be accessed and modified in here. It is the platform \em
129 * callbacks responsibility to initialize and terminate this pointer if
130 * used (see @ref kbase_platform_funcs_conf).
132 void (*power_suspend_callback)(struct kbase_device *kbdev);
134 /** Callback for when the system is resuming from a suspend and GPU
135 * power must be switched on.
137 * Note that if this callback is present, then this may be called
138 * without a following call to power_on_callback. Therefore this
139 * callback must be able to take any action that might otherwise happen
140 * in power_on_callback.
142 * The platform specific private pointer kbase_device::platform_context
143 * can be accessed and modified in here. It is the platform \em
144 * callbacks responsibility to initialize and terminate this pointer if
145 * used (see @ref kbase_platform_funcs_conf).
147 void (*power_resume_callback)(struct kbase_device *kbdev);
149 /** Callback for handling runtime power management initialization.
151 * The runtime power management callbacks @ref power_runtime_off_callback and @ref power_runtime_on_callback
152 * will become active from calls made to the OS from within this function.
153 * The runtime calls can be triggered by calls from @ref power_off_callback and @ref power_on_callback.
154 * Note: for linux the kernel must have CONFIG_PM_RUNTIME enabled to use this feature.
156 * @return 0 on success, else int error code.
158 int (*power_runtime_init_callback)(struct kbase_device *kbdev);
160 /** Callback for handling runtime power management termination.
162 * The runtime power management callbacks @ref power_runtime_off_callback and @ref power_runtime_on_callback
163 * should no longer be called by the OS on completion of this function.
164 * Note: for linux the kernel must have CONFIG_PM_RUNTIME enabled to use this feature.
166 void (*power_runtime_term_callback)(struct kbase_device *kbdev);
168 /** Callback for runtime power-off power management callback
170 * For linux this callback will be called by the kernel runtime_suspend callback.
171 * Note: for linux the kernel must have CONFIG_PM_RUNTIME enabled to use this feature.
173 * @return 0 on success, else OS error code.
175 void (*power_runtime_off_callback)(struct kbase_device *kbdev);
177 /** Callback for runtime power-on power management callback
179 * For linux this callback will be called by the kernel runtime_resume callback.
180 * Note: for linux the kernel must have CONFIG_PM_RUNTIME enabled to use this feature.
182 int (*power_runtime_on_callback)(struct kbase_device *kbdev);
185 * Optional callback for checking if GPU can be suspended when idle
187 * This callback will be called by the runtime power management core
188 * when the reference count goes to 0 to provide notification that the
189 * GPU now seems idle.
191 * If this callback finds that the GPU can't be powered off, or handles
192 * suspend by powering off directly or queueing up a power off, a
193 * non-zero value must be returned to prevent the runtime PM core from
194 * also triggering a suspend.
196 * Returning 0 will cause the runtime PM core to conduct a regular
199 * This callback is optional and if not provided regular autosuspend
202 * Note: The Linux kernel must have CONFIG_PM_RUNTIME enabled to use
205 * Return 0 if GPU can be suspended, positive value if it can not be
206 * suspeneded by runtime PM, else OS error code
208 int (*power_runtime_idle_callback)(struct kbase_device *kbdev);
212 * kbase_cpuprops_get_default_clock_speed - default for CPU_SPEED_FUNC
213 * @clock_speed - see kbase_cpu_clk_speed_func for details on the parameters
215 * Returns 0 on success, negative error code otherwise.
217 * Default implementation of CPU_SPEED_FUNC. This function sets clock_speed
218 * to 100, so will be an underestimate for any real system.
220 int kbase_cpuprops_get_default_clock_speed(u32 * const clock_speed);
223 * kbase_cpu_clk_speed_func - Type of the function pointer for CPU_SPEED_FUNC
224 * @param clock_speed - pointer to store the current CPU clock speed in MHz
226 * Returns 0 on success, otherwise negative error code.
228 * This is mainly used to implement OpenCL's clGetDeviceInfo().
230 typedef int (*kbase_cpu_clk_speed_func) (u32 *clock_speed);
233 * kbase_gpu_clk_speed_func - Type of the function pointer for GPU_SPEED_FUNC
234 * @param clock_speed - pointer to store the current GPU clock speed in MHz
236 * Returns 0 on success, otherwise negative error code.
237 * When an error is returned the caller assumes maximum GPU speed stored in
240 * If the system timer is not available then this function is required
241 * for the OpenCL queue profiling to return correct timing information.
244 typedef int (*kbase_gpu_clk_speed_func) (u32 *clock_speed);
247 struct kbase_platform_config {
252 * @brief Specifies start and end of I/O memory region.
254 struct kbase_io_memory_region {
260 * @brief Specifies I/O related resources like IRQs and memory region for I/O operations.
262 struct kbase_io_resources {
266 struct kbase_io_memory_region io_memory_region;
269 struct kbase_platform_config {
270 const struct kbase_io_resources *io_resources;
273 #endif /* CONFIG_OF */
276 * @brief Gets the pointer to platform config.
278 * @return Pointer to the platform config
280 struct kbase_platform_config *kbase_get_platform_config(void);
283 * kbasep_platform_device_init: - Platform specific call to initialize hardware
284 * @kbdev: kbase device pointer
286 * Function calls a platform defined routine if specified in the configuration
287 * attributes. The routine can initialize any hardware and context state that
288 * is required for the GPU block to function.
290 * Return: 0 if no errors have been found in the config.
291 * Negative error code otherwise.
293 int kbasep_platform_device_init(struct kbase_device *kbdev);
296 * kbasep_platform_device_term - Platform specific call to terminate hardware
297 * @kbdev: Kbase device pointer
299 * Function calls a platform defined routine if specified in the configuration
300 * attributes. The routine can destroy any platform specific context state and
301 * shut down any hardware functionality that are outside of the Power Management
305 void kbasep_platform_device_term(struct kbase_device *kbdev);
309 * kbase_platform_early_init - Early initialisation of the platform code
311 * This function will be called when the module is loaded to perform any
312 * early initialisation required by the platform code. Such as reading
313 * platform specific device tree entries for the GPU.
315 * Return: 0 for success, any other fail causes module initialisation to fail
317 int kbase_platform_early_init(void);
320 #ifdef CONFIG_MALI_PLATFORM_FAKE
322 * kbase_platform_fake_register - Register a platform device for the GPU
324 * This can be used to register a platform device on systems where device tree
325 * is not enabled and the platform initialisation code in the kernel doesn't
326 * create the GPU device. Where possible device tree should be used instead.
328 * Return: 0 for success, any other fail causes module initialisation to fail
330 int kbase_platform_fake_register(void);
333 * kbase_platform_fake_unregister - Unregister a fake platform device
335 * Unregister the platform device created with kbase_platform_fake_register()
337 void kbase_platform_fake_unregister(void);
341 /** @} *//* end group kbase_config */
342 /** @} *//* end group base_kbase_api */
343 /** @} *//* end group base_api */
345 #endif /* _KBASE_CONFIG_H_ */