| /* |
| * |
| * (C) COPYRIGHT 2014-2016 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the |
| * GNU General Public License version 2 as published by the Free Software |
| * Foundation, and any use by you of this program is subject to the terms |
| * of such GNU licence. |
| * |
| * A copy of the licence is included with the program, and can also be obtained |
| * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| |
| |
| |
| /* |
| * HW access job manager common APIs |
| */ |
| |
| #ifndef _KBASE_HWACCESS_JM_H_ |
| #define _KBASE_HWACCESS_JM_H_ |
| |
| /** |
| * kbase_backend_run_atom() - Run an atom on the GPU |
| * @kbdev: Device pointer |
| * @atom: Atom to run |
| * |
| * Caller must hold the HW access lock |
| */ |
| void kbase_backend_run_atom(struct kbase_device *kbdev, |
| struct kbase_jd_atom *katom); |
| |
| /** |
| * kbase_backend_slot_update - Update state based on slot ringbuffers |
| * |
| * @kbdev: Device pointer |
| * |
| * Inspect the jobs in the slot ringbuffers and update state. |
| * |
| * This will cause jobs to be submitted to hardware if they are unblocked |
| */ |
| void kbase_backend_slot_update(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_backend_find_free_address_space() - Find a free address space. |
| * @kbdev: Device pointer |
| * @kctx: Context pointer |
| * |
| * If no address spaces are currently free, then this function can evict an |
| * idle context from the runpool, freeing up the address space it was using. |
| * |
| * The address space is marked as in use. The caller must either assign a |
| * context using kbase_gpu_use_ctx(), or release it using |
| * kbase_gpu_release_free_address_space() |
| * |
| * Return: Number of free address space, or KBASEP_AS_NR_INVALID if none |
| * available |
| */ |
| int kbase_backend_find_free_address_space(struct kbase_device *kbdev, |
| struct kbase_context *kctx); |
| |
| /** |
| * kbase_backend_release_free_address_space() - Release an address space. |
| * @kbdev: Device pointer |
| * @as_nr: Address space to release |
| * |
| * The address space must have been returned by |
| * kbase_gpu_find_free_address_space(). |
| */ |
| void kbase_backend_release_free_address_space(struct kbase_device *kbdev, |
| int as_nr); |
| |
| /** |
| * kbase_backend_use_ctx() - Activate a currently unscheduled context, using the |
| * provided address space. |
| * @kbdev: Device pointer |
| * @kctx: Context pointer. May be NULL |
| * @as_nr: Free address space to use |
| * |
| * kbase_gpu_next_job() will pull atoms from the active context. |
| * |
| * Return: true if successful, false if ASID not assigned. |
| */ |
| bool kbase_backend_use_ctx(struct kbase_device *kbdev, |
| struct kbase_context *kctx, |
| int as_nr); |
| |
| /** |
| * kbase_backend_use_ctx_sched() - Activate a context. |
| * @kbdev: Device pointer |
| * @kctx: Context pointer |
| * |
| * kbase_gpu_next_job() will pull atoms from the active context. |
| * |
| * The context must already be scheduled and assigned to an address space. If |
| * the context is not scheduled, then kbase_gpu_use_ctx() should be used |
| * instead. |
| * |
| * Caller must hold hwaccess_lock |
| * |
| * Return: true if context is now active, false otherwise (ie if context does |
| * not have an address space assigned) |
| */ |
| bool kbase_backend_use_ctx_sched(struct kbase_device *kbdev, |
| struct kbase_context *kctx); |
| |
| /** |
| * kbase_backend_release_ctx_irq - Release a context from the GPU. This will |
| * de-assign the assigned address space. |
| * @kbdev: Device pointer |
| * @kctx: Context pointer |
| * |
| * Caller must hold kbase_device->mmu_hw_mutex and hwaccess_lock |
| */ |
| void kbase_backend_release_ctx_irq(struct kbase_device *kbdev, |
| struct kbase_context *kctx); |
| |
| /** |
| * kbase_backend_release_ctx_noirq - Release a context from the GPU. This will |
| * de-assign the assigned address space. |
| * @kbdev: Device pointer |
| * @kctx: Context pointer |
| * |
| * Caller must hold kbase_device->mmu_hw_mutex |
| * |
| * This function must perform any operations that could not be performed in IRQ |
| * context by kbase_backend_release_ctx_irq(). |
| */ |
| void kbase_backend_release_ctx_noirq(struct kbase_device *kbdev, |
| struct kbase_context *kctx); |
| |
| /** |
| * kbase_backend_complete_wq() - Perform backend-specific actions required on |
| * completing an atom. |
| * @kbdev: Device pointer |
| * @katom: Pointer to the atom to complete |
| * |
| * This function should only be called from kbase_jd_done_worker() or |
| * js_return_worker(). |
| * |
| * Return: true if atom has completed, false if atom should be re-submitted |
| */ |
| void kbase_backend_complete_wq(struct kbase_device *kbdev, |
| struct kbase_jd_atom *katom); |
| |
| /** |
| * kbase_backend_complete_wq_post_sched - Perform backend-specific actions |
| * required on completing an atom, after |
| * any scheduling has taken place. |
| * @kbdev: Device pointer |
| * @core_req: Core requirements of atom |
| * @affinity: Affinity of atom |
| * @coreref_state: Coreref state of atom |
| * |
| * This function should only be called from kbase_jd_done_worker() or |
| * js_return_worker(). |
| */ |
| void kbase_backend_complete_wq_post_sched(struct kbase_device *kbdev, |
| base_jd_core_req core_req, u64 affinity, |
| enum kbase_atom_coreref_state coreref_state); |
| |
| /** |
| * kbase_backend_reset() - The GPU is being reset. Cancel all jobs on the GPU |
| * and remove any others from the ringbuffers. |
| * @kbdev: Device pointer |
| * @end_timestamp: Timestamp of reset |
| */ |
| void kbase_backend_reset(struct kbase_device *kbdev, ktime_t *end_timestamp); |
| |
| /** |
| * kbase_backend_inspect_head() - Return the atom currently at the head of slot |
| * @js |
| * @kbdev: Device pointer |
| * @js: Job slot to inspect |
| * |
| * Return : Atom currently at the head of slot @js, or NULL |
| */ |
| struct kbase_jd_atom *kbase_backend_inspect_head(struct kbase_device *kbdev, |
| int js); |
| |
| /** |
| * kbase_backend_inspect_tail - Return the atom currently at the tail of slot |
| * @js |
| * @kbdev: Device pointer |
| * @js: Job slot to inspect |
| * |
| * Return : Atom currently at the head of slot @js, or NULL |
| */ |
| struct kbase_jd_atom *kbase_backend_inspect_tail(struct kbase_device *kbdev, |
| int js); |
| |
| /** |
| * kbase_backend_nr_atoms_on_slot() - Return the number of atoms currently on a |
| * slot. |
| * @kbdev: Device pointer |
| * @js: Job slot to inspect |
| * |
| * Return : Number of atoms currently on slot |
| */ |
| int kbase_backend_nr_atoms_on_slot(struct kbase_device *kbdev, int js); |
| |
| /** |
| * kbase_backend_nr_atoms_submitted() - Return the number of atoms on a slot |
| * that are currently on the GPU. |
| * @kbdev: Device pointer |
| * @js: Job slot to inspect |
| * |
| * Return : Number of atoms currently on slot @js that are currently on the GPU. |
| */ |
| int kbase_backend_nr_atoms_submitted(struct kbase_device *kbdev, int js); |
| |
| /** |
| * kbase_backend_ctx_count_changed() - Number of contexts ready to submit jobs |
| * has changed. |
| * @kbdev: Device pointer |
| * |
| * Perform any required backend-specific actions (eg starting/stopping |
| * scheduling timers). |
| */ |
| void kbase_backend_ctx_count_changed(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_backend_timeouts_changed() - Job Scheduler timeouts have changed. |
| * @kbdev: Device pointer |
| * |
| * Perform any required backend-specific actions (eg updating timeouts of |
| * currently running atoms). |
| */ |
| void kbase_backend_timeouts_changed(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_backend_slot_free() - Return the number of jobs that can be currently |
| * submitted to slot @js. |
| * @kbdev: Device pointer |
| * @js: Job slot to inspect |
| * |
| * Return : Number of jobs that can be submitted. |
| */ |
| int kbase_backend_slot_free(struct kbase_device *kbdev, int js); |
| |
| /** |
| * kbase_job_check_enter_disjoint - potentially leave disjoint state |
| * @kbdev: kbase device |
| * @target_katom: atom which is finishing |
| * |
| * Work out whether to leave disjoint state when finishing an atom that was |
| * originated by kbase_job_check_enter_disjoint(). |
| */ |
| void kbase_job_check_leave_disjoint(struct kbase_device *kbdev, |
| struct kbase_jd_atom *target_katom); |
| |
| /** |
| * kbase_backend_jm_kill_jobs_from_kctx - Kill all jobs that are currently |
| * running from a context |
| * @kctx: Context pointer |
| * |
| * This is used in response to a page fault to remove all jobs from the faulting |
| * context from the hardware. |
| */ |
| void kbase_backend_jm_kill_jobs_from_kctx(struct kbase_context *kctx); |
| |
| /** |
| * kbase_jm_wait_for_zero_jobs - Wait for context to have zero jobs running, and |
| * to be descheduled. |
| * @kctx: Context pointer |
| * |
| * This should be called following kbase_js_zap_context(), to ensure the context |
| * can be safely destroyed. |
| */ |
| void kbase_jm_wait_for_zero_jobs(struct kbase_context *kctx); |
| |
| /** |
| * kbase_backend_get_current_flush_id - Return the current flush ID |
| * |
| * @kbdev: Device pointer |
| * |
| * Return: the current flush ID to be recorded for each job chain |
| */ |
| u32 kbase_backend_get_current_flush_id(struct kbase_device *kbdev); |
| |
| #if KBASE_GPU_RESET_EN |
| /** |
| * kbase_prepare_to_reset_gpu - Prepare for resetting the GPU. |
| * @kbdev: Device pointer |
| * |
| * This function just soft-stops all the slots to ensure that as many jobs as |
| * possible are saved. |
| * |
| * Return: a boolean which should be interpreted as follows: |
| * - true - Prepared for reset, kbase_reset_gpu should be called. |
| * - false - Another thread is performing a reset, kbase_reset_gpu should |
| * not be called. |
| */ |
| bool kbase_prepare_to_reset_gpu(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_reset_gpu - Reset the GPU |
| * @kbdev: Device pointer |
| * |
| * This function should be called after kbase_prepare_to_reset_gpu if it returns |
| * true. It should never be called without a corresponding call to |
| * kbase_prepare_to_reset_gpu. |
| * |
| * After this function is called (or not called if kbase_prepare_to_reset_gpu |
| * returned false), the caller should wait for kbdev->reset_waitq to be |
| * signalled to know when the reset has completed. |
| */ |
| void kbase_reset_gpu(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_prepare_to_reset_gpu_locked - Prepare for resetting the GPU. |
| * @kbdev: Device pointer |
| * |
| * This function just soft-stops all the slots to ensure that as many jobs as |
| * possible are saved. |
| * |
| * Return: a boolean which should be interpreted as follows: |
| * - true - Prepared for reset, kbase_reset_gpu should be called. |
| * - false - Another thread is performing a reset, kbase_reset_gpu should |
| * not be called. |
| */ |
| bool kbase_prepare_to_reset_gpu_locked(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_reset_gpu_locked - Reset the GPU |
| * @kbdev: Device pointer |
| * |
| * This function should be called after kbase_prepare_to_reset_gpu if it |
| * returns true. It should never be called without a corresponding call to |
| * kbase_prepare_to_reset_gpu. |
| * |
| * After this function is called (or not called if kbase_prepare_to_reset_gpu |
| * returned false), the caller should wait for kbdev->reset_waitq to be |
| * signalled to know when the reset has completed. |
| */ |
| void kbase_reset_gpu_locked(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_reset_gpu_silent - Reset the GPU silently |
| * @kbdev: Device pointer |
| * |
| * Reset the GPU without trying to cancel jobs and don't emit messages into |
| * the kernel log while doing the reset. |
| * |
| * This function should be used in cases where we are doing a controlled reset |
| * of the GPU as part of normal processing (e.g. exiting protected mode) where |
| * the driver will have ensured the scheduler has been idled and all other |
| * users of the GPU (e.g. instrumentation) have been suspended. |
| */ |
| void kbase_reset_gpu_silent(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_reset_gpu_active - Reports if the GPU is being reset |
| * @kbdev: Device pointer |
| * |
| * Return: True if the GPU is in the process of being reset. |
| */ |
| bool kbase_reset_gpu_active(struct kbase_device *kbdev); |
| #endif |
| |
| /** |
| * kbase_job_slot_hardstop - Hard-stop the specified job slot |
| * @kctx: The kbase context that contains the job(s) that should |
| * be hard-stopped |
| * @js: The job slot to hard-stop |
| * @target_katom: The job that should be hard-stopped (or NULL for all |
| * jobs from the context) |
| * Context: |
| * The job slot lock must be held when calling this function. |
| */ |
| void kbase_job_slot_hardstop(struct kbase_context *kctx, int js, |
| struct kbase_jd_atom *target_katom); |
| |
| #endif /* _KBASE_HWACCESS_JM_H_ */ |
