[RFC PATCH 06/12] staging: android: ion: Remove crufty cache support
From: Laura Abbott
Date: Thu Mar 02 2017 - 16:45:31 EST
Now that we call dma_map in the dma_buf API callbacks there is no need
to use the existing cache APIs. Remove the sync ioctl and the existing
bad dma_sync calls. Explicit caching can be handled with the dma_buf
sync API.
Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx>
---
drivers/staging/android/ion/ion-ioctl.c | 5 ----
drivers/staging/android/ion/ion.c | 40 -------------------------
drivers/staging/android/ion/ion_carveout_heap.c | 6 ----
drivers/staging/android/ion/ion_chunk_heap.c | 6 ----
drivers/staging/android/ion/ion_page_pool.c | 3 --
drivers/staging/android/ion/ion_system_heap.c | 5 ----
6 files changed, 65 deletions(-)
diff --git a/drivers/staging/android/ion/ion-ioctl.c b/drivers/staging/android/ion/ion-ioctl.c
index 5b2e93f..f820d77 100644
--- a/drivers/staging/android/ion/ion-ioctl.c
+++ b/drivers/staging/android/ion/ion-ioctl.c
@@ -146,11 +146,6 @@ long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
data.handle.handle = handle->id;
break;
}
- case ION_IOC_SYNC:
- {
- ret = ion_sync_for_device(client, data.fd.fd);
- break;
- }
case ION_IOC_CUSTOM:
{
if (!dev->custom_ioctl)
diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index 8eef1d7..c3c316f 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -815,22 +815,6 @@ static void ion_unmap_dma_buf(struct dma_buf_attachment *attachment,
free_duped_table(table);
}
-void ion_pages_sync_for_device(struct device *dev, struct page *page,
- size_t size, enum dma_data_direction dir)
-{
- struct scatterlist sg;
-
- sg_init_table(&sg, 1);
- sg_set_page(&sg, page, size, 0);
- /*
- * This is not correct - sg_dma_address needs a dma_addr_t that is valid
- * for the targeted device, but this works on the currently targeted
- * hardware.
- */
- sg_dma_address(&sg) = page_to_phys(page);
- dma_sync_sg_for_device(dev, &sg, 1, dir);
-}
-
static int ion_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
{
struct ion_buffer *buffer = dmabuf->priv;
@@ -1042,30 +1026,6 @@ struct ion_handle *ion_import_dma_buf_fd(struct ion_client *client, int fd)
}
EXPORT_SYMBOL(ion_import_dma_buf_fd);
-int ion_sync_for_device(struct ion_client *client, int fd)
-{
- struct dma_buf *dmabuf;
- struct ion_buffer *buffer;
-
- dmabuf = dma_buf_get(fd);
- if (IS_ERR(dmabuf))
- return PTR_ERR(dmabuf);
-
- /* if this memory came from ion */
- if (dmabuf->ops != &dma_buf_ops) {
- pr_err("%s: can not sync dmabuf from another exporter\n",
- __func__);
- dma_buf_put(dmabuf);
- return -EINVAL;
- }
- buffer = dmabuf->priv;
-
- dma_sync_sg_for_device(NULL, buffer->sg_table->sgl,
- buffer->sg_table->nents, DMA_BIDIRECTIONAL);
- dma_buf_put(dmabuf);
- return 0;
-}
-
int ion_query_heaps(struct ion_client *client, struct ion_heap_query *query)
{
struct ion_device *dev = client->dev;
diff --git a/drivers/staging/android/ion/ion_carveout_heap.c b/drivers/staging/android/ion/ion_carveout_heap.c
index 9bf8e98..e0e360f 100644
--- a/drivers/staging/android/ion/ion_carveout_heap.c
+++ b/drivers/staging/android/ion/ion_carveout_heap.c
@@ -100,10 +100,6 @@ static void ion_carveout_heap_free(struct ion_buffer *buffer)
ion_heap_buffer_zero(buffer);
- if (ion_buffer_cached(buffer))
- dma_sync_sg_for_device(NULL, table->sgl, table->nents,
- DMA_BIDIRECTIONAL);
-
ion_carveout_free(heap, paddr, buffer->size);
sg_free_table(table);
kfree(table);
@@ -128,8 +124,6 @@ struct ion_heap *ion_carveout_heap_create(struct ion_platform_heap *heap_data)
page = pfn_to_page(PFN_DOWN(heap_data->base));
size = heap_data->size;
- ion_pages_sync_for_device(NULL, page, size, DMA_BIDIRECTIONAL);
-
ret = ion_heap_pages_zero(page, size, pgprot_writecombine(PAGE_KERNEL));
if (ret)
return ERR_PTR(ret);
diff --git a/drivers/staging/android/ion/ion_chunk_heap.c b/drivers/staging/android/ion/ion_chunk_heap.c
index 8c41889..46e13f6 100644
--- a/drivers/staging/android/ion/ion_chunk_heap.c
+++ b/drivers/staging/android/ion/ion_chunk_heap.c
@@ -101,10 +101,6 @@ static void ion_chunk_heap_free(struct ion_buffer *buffer)
ion_heap_buffer_zero(buffer);
- if (ion_buffer_cached(buffer))
- dma_sync_sg_for_device(NULL, table->sgl, table->nents,
- DMA_BIDIRECTIONAL);
-
for_each_sg(table->sgl, sg, table->nents, i) {
gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
sg->length);
@@ -132,8 +128,6 @@ struct ion_heap *ion_chunk_heap_create(struct ion_platform_heap *heap_data)
page = pfn_to_page(PFN_DOWN(heap_data->base));
size = heap_data->size;
- ion_pages_sync_for_device(NULL, page, size, DMA_BIDIRECTIONAL);
-
ret = ion_heap_pages_zero(page, size, pgprot_writecombine(PAGE_KERNEL));
if (ret)
return ERR_PTR(ret);
diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c
index aea89c1..532eda7 100644
--- a/drivers/staging/android/ion/ion_page_pool.c
+++ b/drivers/staging/android/ion/ion_page_pool.c
@@ -30,9 +30,6 @@ static void *ion_page_pool_alloc_pages(struct ion_page_pool *pool)
if (!page)
return NULL;
- if (!pool->cached)
- ion_pages_sync_for_device(NULL, page, PAGE_SIZE << pool->order,
- DMA_BIDIRECTIONAL);
return page;
}
diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index 6cb2fe7..a33331b 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -75,9 +75,6 @@ static struct page *alloc_buffer_page(struct ion_system_heap *heap,
page = ion_page_pool_alloc(pool);
- if (cached)
- ion_pages_sync_for_device(NULL, page, PAGE_SIZE << order,
- DMA_BIDIRECTIONAL);
return page;
}
@@ -401,8 +398,6 @@ static int ion_system_contig_heap_allocate(struct ion_heap *heap,
buffer->sg_table = table;
- ion_pages_sync_for_device(NULL, page, len, DMA_BIDIRECTIONAL);
-
return 0;
free_table:
--
2.7.4