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staging: android: ion: Remove file ion_chunk_heap.c 

Remove file ion_chunk_heap.c as its functions and definitions are not
used anywhere else.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Link: https://lore.kernel.org/r/20190703081842.22872-2-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nishka Dasgupta 2019-07-03 13:48:42 +05:30 committed by Greg Kroah-Hartman
parent eadbf7a34e
commit 23a4388f24
3 changed files with 0 additions and 157 deletions
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9
drivers/staging/android/ion/Kconfig
View File

@ -18,15 +18,6 @@ config ION_SYSTEM_HEAP
Choose this option to enable the Ion system heap. The system heap
is backed by pages from the buddy allocator. If in doubt, say Y.
config ION_CHUNK_HEAP
bool "Ion chunk heap support"
depends on ION
help
Choose this option to enable chunk heaps with Ion. This heap is
similar in function the carveout heap but memory is broken down
into smaller chunk sizes, typically corresponding to a TLB size.
Unless you know your system has these regions, you should say N here.
config ION_CMA_HEAP
bool "Ion CMA heap support"
depends on ION && DMA_CMA

1
drivers/staging/android/ion/Makefile
View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_ION) += ion.o ion_heap.o
obj-$(CONFIG_ION_SYSTEM_HEAP) += ion_system_heap.o ion_page_pool.o
obj-$(CONFIG_ION_CHUNK_HEAP) += ion_chunk_heap.o
obj-$(CONFIG_ION_CMA_HEAP) += ion_cma_heap.o

147
drivers/staging/android/ion/ion_chunk_heap.c
View File

@ -1,147 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* ION memory allocator chunk heap helper
*
* Copyright (C) 2012 Google, Inc.
*/
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/genalloc.h>
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include "ion.h"
struct ion_chunk_heap {
struct ion_heap heap;
struct gen_pool *pool;
unsigned long chunk_size;
unsigned long size;
unsigned long allocated;
};
static int ion_chunk_heap_allocate(struct ion_heap *heap,
struct ion_buffer *buffer,
unsigned long size,
unsigned long flags)
{
struct ion_chunk_heap *chunk_heap =
container_of(heap, struct ion_chunk_heap, heap);
struct sg_table *table;
struct scatterlist *sg;
int ret, i;
unsigned long num_chunks;
unsigned long allocated_size;
allocated_size = ALIGN(size, chunk_heap->chunk_size);
num_chunks = allocated_size / chunk_heap->chunk_size;
if (allocated_size > chunk_heap->size - chunk_heap->allocated)
return -ENOMEM;
table = kmalloc(sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
ret = sg_alloc_table(table, num_chunks, GFP_KERNEL);
if (ret) {
kfree(table);
return ret;
}
sg = table->sgl;
for (i = 0; i < num_chunks; i++) {
unsigned long paddr = gen_pool_alloc(chunk_heap->pool,
chunk_heap->chunk_size);
if (!paddr)
goto err;
sg_set_page(sg, pfn_to_page(PFN_DOWN(paddr)),
chunk_heap->chunk_size, 0);
sg = sg_next(sg);
}
buffer->sg_table = table;
chunk_heap->allocated += allocated_size;
return 0;
err:
sg = table->sgl;
for (i -= 1; i >= 0; i--) {
gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
sg->length);
sg = sg_next(sg);
}
sg_free_table(table);
kfree(table);
return -ENOMEM;
}
static void ion_chunk_heap_free(struct ion_buffer *buffer)
{
struct ion_heap *heap = buffer->heap;
struct ion_chunk_heap *chunk_heap =
container_of(heap, struct ion_chunk_heap, heap);
struct sg_table *table = buffer->sg_table;
struct scatterlist *sg;
int i;
unsigned long allocated_size;
allocated_size = ALIGN(buffer->size, chunk_heap->chunk_size);
ion_heap_buffer_zero(buffer);
for_each_sg(table->sgl, sg, table->nents, i) {
gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
sg->length);
}
chunk_heap->allocated -= allocated_size;
sg_free_table(table);
kfree(table);
}
static struct ion_heap_ops chunk_heap_ops = {
.allocate = ion_chunk_heap_allocate,
.free = ion_chunk_heap_free,
.map_user = ion_heap_map_user,
.map_kernel = ion_heap_map_kernel,
.unmap_kernel = ion_heap_unmap_kernel,
};
struct ion_heap *ion_chunk_heap_create(phys_addr_t base, size_t size,
size_t chunk_size)
{
struct ion_chunk_heap *chunk_heap;
int ret;
struct page *page;
page = pfn_to_page(PFN_DOWN(base));
ret = ion_heap_pages_zero(page, size, pgprot_writecombine(PAGE_KERNEL));
if (ret)
return ERR_PTR(ret);
chunk_heap = kzalloc(sizeof(*chunk_heap), GFP_KERNEL);
if (!chunk_heap)
return ERR_PTR(-ENOMEM);
chunk_heap->chunk_size = chunk_size;
chunk_heap->pool = gen_pool_create(get_order(chunk_heap->chunk_size) +
PAGE_SHIFT, -1);
if (!chunk_heap->pool) {
ret = -ENOMEM;
goto error_gen_pool_create;
}
chunk_heap->size = size;
chunk_heap->allocated = 0;
gen_pool_add(chunk_heap->pool, base, size, -1);
chunk_heap->heap.ops = &chunk_heap_ops;
chunk_heap->heap.type = ION_HEAP_TYPE_CHUNK;
chunk_heap->heap.flags = ION_HEAP_FLAG_DEFER_FREE;
pr_debug("%s: base %pa size %zu\n", __func__, &base, size);
return &chunk_heap->heap;
error_gen_pool_create:
kfree(chunk_heap);
return ERR_PTR(ret);
}