diff options
author | Nishka Dasgupta <nishkadg.linux@gmail.com> | 2019-07-03 13:48:42 +0530 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-03 18:25:07 +0200 |
commit | 23a4388f24f5356fa0bef07911c7b4fbc97619ac (patch) | |
tree | 4fed491a9627d7b9beef80dd141d7efe69d262c4 /drivers/staging/android/ion | |
parent | eadbf7a34e44e8fb2e63142b992bf264ffb72bf9 (diff) |
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>
Diffstat (limited to 'drivers/staging/android/ion')
-rw-r--r-- | drivers/staging/android/ion/Kconfig | 9 | ||||
-rw-r--r-- | drivers/staging/android/ion/Makefile | 1 | ||||
-rw-r--r-- | drivers/staging/android/ion/ion_chunk_heap.c | 147 |
3 files changed, 0 insertions, 157 deletions
diff --git a/drivers/staging/android/ion/Kconfig b/drivers/staging/android/ion/Kconfig index dff641451a89..989fe84a9f9d 100644 --- a/drivers/staging/android/ion/Kconfig +++ b/drivers/staging/android/ion/Kconfig @@ -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 diff --git a/drivers/staging/android/ion/Makefile b/drivers/staging/android/ion/Makefile index 0ac5465e2841..5f4487b1a224 100644 --- a/drivers/staging/android/ion/Makefile +++ b/drivers/staging/android/ion/Makefile @@ -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 diff --git a/drivers/staging/android/ion/ion_chunk_heap.c b/drivers/staging/android/ion/ion_chunk_heap.c deleted file mode 100644 index 1e869f4bad45..000000000000 --- a/drivers/staging/android/ion/ion_chunk_heap.c +++ /dev/null @@ -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); -} |