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/*
*
* (C) COPYRIGHT 2014-2016, 2018-2019 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
* SPDX-License-Identifier: GPL-2.0
*
*/
/*
* Register-based HW access backend specific definitions
*/
#ifndef _KBASE_HWACCESS_GPU_DEFS_H_
#define _KBASE_HWACCESS_GPU_DEFS_H_
/* SLOT_RB_SIZE must be < 256 */
#define SLOT_RB_SIZE 2
#define SLOT_RB_MASK (SLOT_RB_SIZE - 1)
/**
* struct rb_entry - Ringbuffer entry
* @katom: Atom associated with this entry
*/
struct rb_entry {
struct kbase_jd_atom *katom;
};
/**
* struct slot_rb - Slot ringbuffer
* @entries: Ringbuffer entries
* @last_context: The last context to submit a job on this slot
* @read_idx: Current read index of buffer
* @write_idx: Current write index of buffer
* @job_chain_flag: Flag used to implement jobchain disambiguation
*/
struct slot_rb {
struct rb_entry entries[SLOT_RB_SIZE];
struct kbase_context *last_context;
u8 read_idx;
u8 write_idx;
u8 job_chain_flag;
};
/**
* struct kbase_backend_data - GPU backend specific data for HW access layer
* @slot_rb: Slot ringbuffers
* @scheduling_timer: The timer tick used for rescheduling jobs
* @timer_running: Is the timer running? The runpool_mutex must be
* held whilst modifying this.
* @suspend_timer: Is the timer suspended? Set when a suspend
* occurs and cleared on resume. The runpool_mutex
* must be held whilst modifying this.
* @reset_gpu: Set to a KBASE_RESET_xxx value (see comments)
* @reset_workq: Work queue for performing the reset
* @reset_work: Work item for performing the reset
* @reset_wait: Wait event signalled when the reset is complete
* @reset_timer: Timeout for soft-stops before the reset
* @timeouts_updated: Have timeout values just been updated?
*
* The hwaccess_lock (a spinlock) must be held when accessing this structure
*/
struct kbase_backend_data {
struct slot_rb slot_rb[BASE_JM_MAX_NR_SLOTS];
struct hrtimer scheduling_timer;
bool timer_running;
bool suspend_timer;
atomic_t reset_gpu;
/* The GPU reset isn't pending */
#define KBASE_RESET_GPU_NOT_PENDING 0
/* kbase_prepare_to_reset_gpu has been called */
#define KBASE_RESET_GPU_PREPARED 1
/* kbase_reset_gpu has been called - the reset will now definitely happen
* within the timeout period */
#define KBASE_RESET_GPU_COMMITTED 2
/* The GPU reset process is currently occuring (timeout has expired or
* kbasep_try_reset_gpu_early was called) */
#define KBASE_RESET_GPU_HAPPENING 3
/* Reset the GPU silently, used when resetting the GPU as part of normal
* behavior (e.g. when exiting protected mode). */
#define KBASE_RESET_GPU_SILENT 4
struct workqueue_struct *reset_workq;
struct work_struct reset_work;
wait_queue_head_t reset_wait;
struct hrtimer reset_timer;
bool timeouts_updated;
};
#endif /* _KBASE_HWACCESS_GPU_DEFS_H_ */
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