/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* (C) COPYRIGHT 2019-2021 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for 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, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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#ifndef _KBASE_CSF_TILER_HEAP_H_
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#define _KBASE_CSF_TILER_HEAP_H_
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#include <mali_kbase.h>
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/**
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* kbase_csf_tiler_heap_context_init - Initialize the tiler heaps context for a
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* GPU address space
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*
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* @kctx: Pointer to the kbase context being initialized.
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*
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* Return: 0 if successful or a negative error code on failure.
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*/
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int kbase_csf_tiler_heap_context_init(struct kbase_context *kctx);
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/**
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* kbase_csf_tiler_heap_context_term - Terminate the tiler heaps context for a
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* GPU address space
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*
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* This function deletes any chunked tiler heaps that weren't deleted before
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* context termination.
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*
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* @kctx: Pointer to the kbase context being terminated.
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*/
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void kbase_csf_tiler_heap_context_term(struct kbase_context *kctx);
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/**
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* kbase_csf_tiler_heap_init - Initialize a chunked tiler memory heap.
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*
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* @kctx: Pointer to the kbase context in which to allocate resources for the
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* tiler heap.
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* @chunk_size: Size of each chunk, in bytes. Must be page-aligned.
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* @initial_chunks: The initial number of chunks to allocate. Must not be
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* zero or greater than @max_chunks.
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* @max_chunks: The maximum number of chunks that the heap should be allowed
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* to use. Must not be less than @initial_chunks.
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* @target_in_flight: Number of render-passes that the driver should attempt to
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* keep in flight for which allocation of new chunks is
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* allowed. Must not be zero.
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* @gpu_heap_va: Where to store the GPU virtual address of the context that was
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* set up for the tiler heap.
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* @first_chunk_va: Where to store the GPU virtual address of the first chunk
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* allocated for the heap. This points to the header of the
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* heap chunk and not to the low address of free memory in it.
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*
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* Return: 0 if successful or a negative error code on failure.
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*/
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int kbase_csf_tiler_heap_init(struct kbase_context *kctx,
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u32 chunk_size, u32 initial_chunks, u32 max_chunks,
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u16 target_in_flight, u64 *gpu_heap_va,
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u64 *first_chunk_va);
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/**
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* kbasep_cs_tiler_heap_term - Terminate a chunked tiler memory heap.
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*
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* This function will terminate a chunked tiler heap and cause all the chunks
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* (initial and those added during out-of-memory processing) to be freed.
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* It is the caller's responsibility to ensure no further operations on this
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* heap will happen before calling this function.
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*
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* @kctx: Pointer to the kbase context in which the tiler heap was initialized.
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* @gpu_heap_va: The GPU virtual address of the context that was set up for the
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* tiler heap.
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*
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* Return: 0 if successful or a negative error code on failure.
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*/
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int kbase_csf_tiler_heap_term(struct kbase_context *kctx, u64 gpu_heap_va);
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/**
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* kbase_csf_tiler_heap_alloc_new_chunk - Allocate a new chunk for tiler heap.
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*
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* This function will allocate a new chunk for the chunked tiler heap depending
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* on the settings provided by userspace when the heap was created and the
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* heap's statistics (like number of render passes in-flight).
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* It would return an appropriate error code if a new chunk couldn't be
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* allocated.
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*
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* @kctx: Pointer to the kbase context in which the tiler heap was initialized.
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* @gpu_heap_va: GPU virtual address of the heap context.
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* @nr_in_flight: Number of render passes that are in-flight, must not be zero.
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* @pending_frag_count: Number of render passes in-flight with completed vertex/tiler stage.
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* The minimum value is zero but it must be less or equal to
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* the total number of render passes in flight
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* @new_chunk_ptr: Where to store the GPU virtual address & size of the new
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* chunk allocated for the heap.
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*
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* Return: 0 if a new chunk was allocated otherwise an appropriate negative
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* error code (like -EBUSY when a free chunk is expected to be
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* available upon completion of a render pass and -EINVAL when
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* invalid value was passed for one of the argument).
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*/
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int kbase_csf_tiler_heap_alloc_new_chunk(struct kbase_context *kctx,
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u64 gpu_heap_va, u32 nr_in_flight, u32 pending_frag_count, u64 *new_chunk_ptr);
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#endif
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