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staging: android: ion: Remove file ion_carveout_heap.c

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Remove file ion_carveout_heap.c as its functions and definitions are not
used anywhere.
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/20190703081842.22872-1-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nishka Dasgupta 2019-07-03 13:48:41 +05:30 committed by Greg Kroah-Hartman
parent af89bcef55
commit eadbf7a34e
3 changed files with 0 additions and 143 deletions
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9
drivers/staging/android/ion/Kconfig
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@ -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_CARVEOUT_HEAP
bool "Ion carveout heap support"
depends on ION
help
Choose this option to enable carveout heaps with Ion. Carveout heaps
are backed by memory reserved from the system. Allocation times are
typically faster at the cost of memory not being used. Unless you
know your system has these regions, you should say N here.
config ION_CHUNK_HEAP
bool "Ion chunk heap support"
depends on ION

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

@ -1,6 +1,5 @@
# 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-$(CONFIG_ION_CARVEOUT_HEAP) += ion_carveout_heap.o
obj-$(CONFIG_ION_CHUNK_HEAP) += ion_chunk_heap.o
obj-$(CONFIG_ION_CMA_HEAP) += ion_cma_heap.o

133
drivers/staging/android/ion/ion_carveout_heap.c
View File

@ -1,133 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* ION Memory Allocator carveout heap helper
*
* Copyright (C) 2011 Google, Inc.
*/
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/genalloc.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include "ion.h"
#define ION_CARVEOUT_ALLOCATE_FAIL -1
struct ion_carveout_heap {
struct ion_heap heap;
struct gen_pool *pool;
};
static phys_addr_t ion_carveout_allocate(struct ion_heap *heap,
unsigned long size)
{
struct ion_carveout_heap *carveout_heap =
container_of(heap, struct ion_carveout_heap, heap);
unsigned long offset = gen_pool_alloc(carveout_heap->pool, size);
if (!offset)
return ION_CARVEOUT_ALLOCATE_FAIL;
return offset;
}
static void ion_carveout_free(struct ion_heap *heap, phys_addr_t addr,
unsigned long size)
{
struct ion_carveout_heap *carveout_heap =
container_of(heap, struct ion_carveout_heap, heap);
if (addr == ION_CARVEOUT_ALLOCATE_FAIL)
return;
gen_pool_free(carveout_heap->pool, addr, size);
}
static int ion_carveout_heap_allocate(struct ion_heap *heap,
struct ion_buffer *buffer,
unsigned long size,
unsigned long flags)
{
struct sg_table *table;
phys_addr_t paddr;
int ret;
table = kmalloc(sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
ret = sg_alloc_table(table, 1, GFP_KERNEL);
if (ret)
goto err_free;
paddr = ion_carveout_allocate(heap, size);
if (paddr == ION_CARVEOUT_ALLOCATE_FAIL) {
ret = -ENOMEM;
goto err_free_table;
}
sg_set_page(table->sgl, pfn_to_page(PFN_DOWN(paddr)), size, 0);
buffer->sg_table = table;
return 0;
err_free_table:
sg_free_table(table);
err_free:
kfree(table);
return ret;
}
static void ion_carveout_heap_free(struct ion_buffer *buffer)
{
struct ion_heap *heap = buffer->heap;
struct sg_table *table = buffer->sg_table;
struct page *page = sg_page(table->sgl);
phys_addr_t paddr = PFN_PHYS(page_to_pfn(page));
ion_heap_buffer_zero(buffer);
ion_carveout_free(heap, paddr, buffer->size);
sg_free_table(table);
kfree(table);
}
static struct ion_heap_ops carveout_heap_ops = {
.allocate = ion_carveout_heap_allocate,
.free = ion_carveout_heap_free,
.map_user = ion_heap_map_user,
.map_kernel = ion_heap_map_kernel,
.unmap_kernel = ion_heap_unmap_kernel,
};
struct ion_heap *ion_carveout_heap_create(phys_addr_t base, size_t size)
{
struct ion_carveout_heap *carveout_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);
carveout_heap = kzalloc(sizeof(*carveout_heap), GFP_KERNEL);
if (!carveout_heap)
return ERR_PTR(-ENOMEM);
carveout_heap->pool = gen_pool_create(PAGE_SHIFT, -1);
if (!carveout_heap->pool) {
kfree(carveout_heap);
return ERR_PTR(-ENOMEM);
}
gen_pool_add(carveout_heap->pool, base, size, -1);
carveout_heap->heap.ops = &carveout_heap_ops;
carveout_heap->heap.type = ION_HEAP_TYPE_CARVEOUT;
carveout_heap->heap.flags = ION_HEAP_FLAG_DEFER_FREE;
return &carveout_heap->heap;
}