diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_events.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_events.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.h b/drivers/gpu/drm/amd/amdkfd/kfd_events.h new file mode 100644 index 000000000..52ccfd397 --- /dev/null +++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.h @@ -0,0 +1,90 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* + * Copyright 2014-2022 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef KFD_EVENTS_H_INCLUDED +#define KFD_EVENTS_H_INCLUDED + +#include <linux/kernel.h> +#include <linux/hashtable.h> +#include <linux/types.h> +#include <linux/list.h> +#include <linux/wait.h> +#include "kfd_priv.h" +#include <uapi/linux/kfd_ioctl.h> + +/* + * IDR supports non-negative integer IDs. Small IDs are used for + * signal events to match their signal slot. Use the upper half of the + * ID space for non-signal events. + */ +#define KFD_FIRST_NONSIGNAL_EVENT_ID ((INT_MAX >> 1) + 1) +#define KFD_LAST_NONSIGNAL_EVENT_ID INT_MAX + +/* + * Written into kfd_signal_slot_t to indicate that the event is not signaled. + * Since the event protocol may need to write the event ID into memory, this + * must not be a valid event ID. + * For the sake of easy memset-ing, this must be a byte pattern. + */ +#define UNSIGNALED_EVENT_SLOT ((uint64_t)-1) + +struct kfd_event_waiter; +struct signal_page; + +struct kfd_event { + u32 event_id; + u64 event_age; + + bool signaled; + bool auto_reset; + + int type; + + spinlock_t lock; + wait_queue_head_t wq; /* List of event waiters. */ + + /* Only for signal events. */ + uint64_t __user *user_signal_address; + + /* type specific data */ + union { + struct kfd_hsa_memory_exception_data memory_exception_data; + struct kfd_hsa_hw_exception_data hw_exception_data; + }; + + struct rcu_head rcu; /* for asynchronous kfree_rcu */ +}; + +#define KFD_EVENT_TIMEOUT_IMMEDIATE 0 +#define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu + +/* Matching HSA_EVENTTYPE */ +#define KFD_EVENT_TYPE_SIGNAL 0 +#define KFD_EVENT_TYPE_HW_EXCEPTION 3 +#define KFD_EVENT_TYPE_DEBUG 5 +#define KFD_EVENT_TYPE_MEMORY 8 + +extern void kfd_signal_event_interrupt(u32 pasid, uint32_t partial_id, + uint32_t valid_id_bits); + +#endif |