308 lines
8.5 KiB
C
308 lines
8.5 KiB
C
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/*
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* NVHOST Queue management header for T194
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*
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* Copyright (c) 2016-2017, NVIDIA Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __NVHOST_NVHOST_QUEUE_H__
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#define __NVHOST_NVHOST_QUEUE_H__
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#include <linux/kref.h>
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struct nvhost_queue_task_pool;
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/**
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* @brief Describe a allocated task mem struct
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*
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* kmem_addr Address for the task kernel memory
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* dma_addr Physical address of task memory
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* va Virtual address of the task memory
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* pool_index Index to the allocated task memory
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*
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* This is keep track of the memory details of the task
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* struct that is being shared between kernel and firmware.
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*/
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struct nvhost_queue_task_mem_info {
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void *kmem_addr;
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dma_addr_t dma_addr;
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void *va;
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int pool_index;
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};
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/**
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* @brief Information needed in a Queue
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*
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* pool pointer queue pool
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* kref struct kref for reference count
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* syncpt_id Host1x syncpt id
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* id Queue id
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* list_lock mutex for tasks lists control
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* tasklist Head of tasks list
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* sequence monotonically incrementing task id per queue
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* task_pool pointer to struct for task memory pool
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* task_dma_size dma size used in hardware for a task
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* task_kmem_size kernel memory size for a task
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* attr queue attribute associated with the host module
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*
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*/
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struct nvhost_queue {
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struct nvhost_queue_task_pool *task_pool;
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struct nvhost_queue_pool *pool;
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struct kref kref;
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u32 id;
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/* Host1x resources */
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struct nvhost_channel *channel;
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struct platform_device *vm_pdev;
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bool use_channel;
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u32 syncpt_id;
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size_t task_dma_size;
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size_t task_kmem_size;
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u32 sequence;
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struct mutex attr_lock;
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void *attr;
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struct mutex list_lock;
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struct list_head tasklist;
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};
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/**
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* @brief hardware specific queue callbacks
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*
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* dump dump the task information
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* abort abort all tasks from a queue
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* submit submit the given list of tasks to hardware
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* get_task_size get the dma size needed for the task in hw
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* and the kernel memory size needed for task.
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*
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*/
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struct nvhost_queue_ops {
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void (*dump)(struct nvhost_queue *queue, struct seq_file *s);
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int (*abort)(struct nvhost_queue *queue);
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int (*submit)(struct nvhost_queue *queue, void *task_arg);
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void (*get_task_size)(size_t *dma_size, size_t *kmem_size);
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int (*set_attribute)(struct nvhost_queue *queue, void *arg);
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};
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/**
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* @brief Queue pool data structure to hold queue table
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*
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* pdev Pointer to the Queue client device
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* ops Pointer to hardware specific queue ops
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* queues Queues available for the client
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* queue_lock Mutex for the bitmap of reserved queues
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* alloc_table Bitmap of allocated queues
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* max_queue_cnt Max number queues available for client
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* queue_task_pool Pointer to the task memory pool for queues.
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*
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*/
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struct nvhost_queue_pool {
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struct platform_device *pdev;
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struct nvhost_queue_ops *ops;
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struct nvhost_queue *queues;
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struct mutex queue_lock;
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unsigned long alloc_table;
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unsigned int max_queue_cnt;
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void *queue_task_pool;
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};
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/**
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* @brief Initialize queue structures
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*
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* This function allocates and initializes queue data structures.
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*
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* @param pdev Pointer to the Queue client device
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* @param ops Pointer to device speicific callbacks
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* @param num_queues Max number queues available for client
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* @return pointer to queue pool
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*
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*/
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struct nvhost_queue_pool *nvhost_queue_init(struct platform_device *pdev,
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struct nvhost_queue_ops *ops,
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unsigned int num_queues);
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/**
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* @brief De-initialize queue structures
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*
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* This function free's all queue data structures.
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*
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* @param pool pointer to queue pool
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* @return void
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*
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*/
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void nvhost_queue_deinit(struct nvhost_queue_pool *pool);
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/**
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* @brief Release reference of a queue
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*
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* This function releases reference for a queue.
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*
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* @param queue Pointer to an allocated queue.
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* @return void
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*
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*/
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void nvhost_queue_put(struct nvhost_queue *queue);
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/**
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* @brief Get reference on a queue.
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*
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* This function used to get a reference to an already allocated queue.
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*
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* @param queue Pointer to an allocated queue.
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* @return None
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*
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*/
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void nvhost_queue_get(struct nvhost_queue *queue);
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/**
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* @brief Allocate a queue for client.
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*
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* This function allocates a queue from the pool to client for the user.
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*
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* @param pool Pointer to a queue pool table
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* @param num_tasks Max number of tasks per queue
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* @param use_channel Determines whether the routine allocates a channel for
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* the queue.
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*
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* @return Pointer to a queue struct on success
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* or negative error on failure.
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*
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*/
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struct nvhost_queue *nvhost_queue_alloc(struct nvhost_queue_pool *pool,
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unsigned int num_tasks,
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bool use_channel);
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/**
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* @brief Abort all active queues
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*
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* @param pool Pointer to a queue pool table
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*/
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void nvhost_queue_abort_all(struct nvhost_queue_pool *pool);
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/**
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* @brief Abort tasks within a client queue
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*
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* This function aborts all tasks from the given clinet queue. If there is no
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* active tasks, the function call is no-op.
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* It is expected to be called when an active device fd gets closed.
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*
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* @param queue Pointer to an allocated queue
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* @return None
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*
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*/
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int nvhost_queue_abort(struct nvhost_queue *queue);
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/**
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* @brief submits the given list of tasks to hardware
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*
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* This function submits the given list of tasks to hardware.
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* The submit structure is updated with the fence values as appropriate.
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*
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* @param queue Pointer to an allocated queue
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* @param submit Submit the given list of tasks to hardware
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* @return 0 on success or negative error code on failure.
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*
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*/
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int nvhost_queue_submit(struct nvhost_queue *queue, void *submit);
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/**
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* @brief Get the Task Size needed
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*
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* This function get the needed memory size for the task. This memory is
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* shared memory between kernel and firmware
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*
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* @param queue Pointer to an allocated queue
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* @return Size of the task
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*
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*/
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int nvhost_queue_get_task_size(struct nvhost_queue *queue);
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/**
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* @brief Allocate a memory from task memory pool
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*
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* This function helps to assign a task memory from
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* the preallocated task memory pool. This memory is shared memory between
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* kernel and firmware
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*
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* @queue Pointer to an allocated queue
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* @task_mem_info Pointer to nvhost_queue_task_mem_info struct
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*
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* @return 0 on success, otherwise a negative error code is returned
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*
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*/
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int nvhost_queue_alloc_task_memory(
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struct nvhost_queue *queue,
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struct nvhost_queue_task_mem_info *task_mem_info);
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/**
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* @brief Free the assigned task memory
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*
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* This function helps to unset the assigned task memory
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*
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* @param queue Pointer to an allocated queue
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* @param index Index of the assigned task pool memory
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* @return void
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*
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*/
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void nvhost_queue_free_task_memory(struct nvhost_queue *queue, int index);
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/**
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* @brief Sets the attribute to the queue
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*
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* This function set the attribute of the queue with the arguments passed
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*
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* @param queue Pointer to an allocated queue
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* @param arg The structure which consists of the id and value
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* @return 0 on success or negative error code on failure.
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*
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*/
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int nvhost_queue_set_attr(struct nvhost_queue *queue, void *arg);
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/**
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* @brief Submit the given command buffer to the device
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*
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* This functions submits the given cmdbuf to a Host1x channel. The
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* submit must perform the given number of syncpoint increments
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* on the engine.
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*
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* @param queue Pointer to an allocated queue
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* @param cmdbuf Pointer to a command buffer to submit
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* @param num_cmdbuf_words Number of words in the command buffer
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* @param num_syncpt_incrs Number of syncpoint increments the task
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* issues
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* @param wait_syncpt_ids Syncpoint ids that should be waited on
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* Host1x
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* @param wait_syncpoint_thresholds Syncpoint thresholds for the waits
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* @param task_syncpt_threshold Pointer to a u32. The variable is
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* initialized to have the completion
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* threshold.
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*
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* @return 0 on success or negative error code on
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* failure.
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*
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*/
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int nvhost_queue_submit_to_host1x(struct nvhost_queue *queue,
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u32 *cmdbuf,
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u32 num_cmdbuf_words,
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u32 num_syncpt_incrs,
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u32 *wait_syncpt_ids,
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u32 *wait_syncpt_thresholds,
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u32 num_syncpt_waits,
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u32 *task_syncpt_threshold);
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#endif
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