[RFCv3][PATCH 4/5] staging: android: ion: Convert to the kernel_force_cache APIs
From: Laura Abbott
Date: Mon Sep 12 2016 - 17:33:52 EST
Now that there exists a proper set of cache sync APIs, move away
from the dma_sync and do less bad things.
Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx>
---
v3: Rebased to latest-next
---
drivers/staging/android/ion/ion.c | 22 ++++------------------
drivers/staging/android/ion/ion_carveout_heap.c | 8 +++++---
drivers/staging/android/ion/ion_chunk_heap.c | 12 +++++++-----
drivers/staging/android/ion/ion_page_pool.c | 7 ++++---
drivers/staging/android/ion/ion_priv.h | 11 -----------
drivers/staging/android/ion/ion_system_heap.c | 6 +++---
6 files changed, 23 insertions(+), 43 deletions(-)
diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index 396ded5..c2125de 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -37,6 +37,8 @@
#include <linux/dma-buf.h>
#include <linux/idr.h>
+#include <linux/cacheflush.h>
+
#include "ion.h"
#include "ion_priv.h"
#include "compat_ion.h"
@@ -817,22 +819,6 @@ static void ion_unmap_dma_buf(struct dma_buf_attachment *attachment,
{
}
-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);
-}
-
struct ion_vma_list {
struct list_head list;
struct vm_area_struct *vma;
@@ -857,8 +843,8 @@ static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
struct page *page = buffer->pages[i];
if (ion_buffer_page_is_dirty(page))
- ion_pages_sync_for_device(dev, ion_buffer_page(page),
- PAGE_SIZE, dir);
+ kernel_force_cache_clean(ion_buffer_page(page),
+ PAGE_SIZE);
ion_buffer_page_clean(buffer->pages + i);
}
diff --git a/drivers/staging/android/ion/ion_carveout_heap.c b/drivers/staging/android/ion/ion_carveout_heap.c
index c4f0795..af81edc 100644
--- a/drivers/staging/android/ion/ion_carveout_heap.c
+++ b/drivers/staging/android/ion/ion_carveout_heap.c
@@ -22,6 +22,9 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+
+#include <linux/cacheflush.h>
+
#include "ion.h"
#include "ion_priv.h"
@@ -105,8 +108,7 @@ 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);
+ kernel_force_cache_clean(page, buffer->size);
ion_carveout_free(heap, paddr, buffer->size);
sg_free_table(table);
@@ -132,7 +134,7 @@ 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);
+ kernel_force_cache_clean(page, size);
ret = ion_heap_pages_zero(page, size, pgprot_writecombine(PAGE_KERNEL));
if (ret)
diff --git a/drivers/staging/android/ion/ion_chunk_heap.c b/drivers/staging/android/ion/ion_chunk_heap.c
index 70495dc..f6d1bae 100644
--- a/drivers/staging/android/ion/ion_chunk_heap.c
+++ b/drivers/staging/android/ion/ion_chunk_heap.c
@@ -21,6 +21,9 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+
+#include <linux/cacheflush.h>
+
#include "ion.h"
#include "ion_priv.h"
@@ -104,11 +107,10 @@ 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) {
+ if (ion_buffer_cached(buffer))
+ kernel_force_cache_clean(sg_page(table->sgl),
+ sg->length);
gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
sg->length);
}
@@ -135,7 +137,7 @@ 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);
+ kernel_force_cache_clean(page, size);
ret = ion_heap_pages_zero(page, size, pgprot_writecombine(PAGE_KERNEL));
if (ret)
diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c
index aea89c1..f289d88 100644
--- a/drivers/staging/android/ion/ion_page_pool.c
+++ b/drivers/staging/android/ion/ion_page_pool.c
@@ -22,6 +22,9 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/swap.h>
+
+#include <linux/cacheflush.h>
+
#include "ion_priv.h"
static void *ion_page_pool_alloc_pages(struct ion_page_pool *pool)
@@ -30,9 +33,7 @@ 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);
+ kernel_force_cache_clean(page, PAGE_SIZE << pool->order);
return page;
}
diff --git a/drivers/staging/android/ion/ion_priv.h b/drivers/staging/android/ion/ion_priv.h
index 3c3b324..a344190 100644
--- a/drivers/staging/android/ion/ion_priv.h
+++ b/drivers/staging/android/ion/ion_priv.h
@@ -441,17 +441,6 @@ void ion_page_pool_free(struct ion_page_pool *, struct page *);
int ion_page_pool_shrink(struct ion_page_pool *pool, gfp_t gfp_mask,
int nr_to_scan);
-/**
- * ion_pages_sync_for_device - cache flush pages for use with the specified
- * device
- * @dev: the device the pages will be used with
- * @page: the first page to be flushed
- * @size: size in bytes of region to be flushed
- * @dir: direction of dma transfer
- */
-void ion_pages_sync_for_device(struct device *dev, struct page *page,
- size_t size, enum dma_data_direction dir);
-
long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
int ion_sync_for_device(struct ion_client *client, int fd);
diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index 7e023d5..8eefe83 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -23,6 +23,7 @@
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+#include <linux/cacheflush.h>
#include "ion.h"
#include "ion_priv.h"
@@ -76,8 +77,7 @@ 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);
+ kernel_force_cache_clean(page, PAGE_SIZE << order);
return page;
}
@@ -408,7 +408,7 @@ 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);
+ kernel_force_cache_clean(page, len);
return 0;
--
2.7.4