[RFC PATCH 1/4] staging: android: ion: Some cleanup
From: Laura Abbott
Date: Wed Dec 14 2016 - 19:08:37 EST
- dmap_cnt isn't used. Remove it.
- Ion has been using dma apis incorrectly to sync the caches.
Remove bad usage in preparation for something better.
- The alignment field doesn't actually change the alignment of an
allocation, it only serves as an error check. This is basically
pointless. Remove the field.
Not-signed-off-by: Laura Abbott <labbott@xxxxxxxxxx>
---
drivers/staging/android/ion/ion-ioctl.c | 6 --
drivers/staging/android/ion/ion.c | 92 ++-----------------------
drivers/staging/android/ion/ion.h | 5 +-
drivers/staging/android/ion/ion_carveout_heap.c | 16 +----
drivers/staging/android/ion/ion_chunk_heap.c | 15 +---
drivers/staging/android/ion/ion_cma_heap.c | 5 +-
drivers/staging/android/ion/ion_page_pool.c | 3 -
drivers/staging/android/ion/ion_priv.h | 4 +-
drivers/staging/android/ion/ion_system_heap.c | 14 +---
9 files changed, 16 insertions(+), 144 deletions(-)
diff --git a/drivers/staging/android/ion/ion-ioctl.c b/drivers/staging/android/ion/ion-ioctl.c
index 7e7431d..a27db9d 100644
--- a/drivers/staging/android/ion/ion-ioctl.c
+++ b/drivers/staging/android/ion/ion-ioctl.c
@@ -95,7 +95,6 @@ long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
struct ion_handle *handle;
handle = ion_alloc(client, data.allocation.len,
- data.allocation.align,
data.allocation.heap_id_mask,
data.allocation.flags);
if (IS_ERR(handle))
@@ -146,11 +145,6 @@ 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 d5cc307..8dd0932 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -102,7 +102,6 @@ static void ion_buffer_add(struct ion_device *dev,
static struct ion_buffer *ion_buffer_create(struct ion_heap *heap,
struct ion_device *dev,
unsigned long len,
- unsigned long align,
unsigned long flags)
{
struct ion_buffer *buffer;
@@ -118,15 +117,14 @@ static struct ion_buffer *ion_buffer_create(struct ion_heap *heap,
buffer->flags = flags;
kref_init(&buffer->ref);
- ret = heap->ops->allocate(heap, buffer, len, align, flags);
+ ret = heap->ops->allocate(heap, buffer, len, flags);
if (ret) {
if (!(heap->flags & ION_HEAP_FLAG_DEFER_FREE))
goto err2;
ion_heap_freelist_drain(heap, 0);
- ret = heap->ops->allocate(heap, buffer, len, align,
- flags);
+ ret = heap->ops->allocate(heap, buffer, len, flags);
if (ret)
goto err2;
}
@@ -400,7 +398,7 @@ static int ion_handle_add(struct ion_client *client, struct ion_handle *handle)
}
struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
- size_t align, unsigned int heap_id_mask,
+ unsigned int heap_id_mask,
unsigned int flags)
{
struct ion_handle *handle;
@@ -409,8 +407,8 @@ struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
struct ion_heap *heap;
int ret;
- pr_debug("%s: len %zu align %zu heap_id_mask %u flags %x\n", __func__,
- len, align, heap_id_mask, flags);
+ pr_debug("%s: len %zu heap_id_mask %u flags %x\n", __func__,
+ len, heap_id_mask, flags);
/*
* traverse the list of heaps available in this system in priority
* order. If the heap type is supported by the client, and matches the
@@ -427,7 +425,7 @@ struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
/* if the caller didn't specify this heap id */
if (!((1 << heap->id) & heap_id_mask))
continue;
- buffer = ion_buffer_create(heap, dev, len, align, flags);
+ buffer = ion_buffer_create(heap, dev, len, flags);
if (!IS_ERR(buffer))
break;
}
@@ -797,17 +795,12 @@ void ion_client_destroy(struct ion_client *client)
}
EXPORT_SYMBOL(ion_client_destroy);
-static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
- struct device *dev,
- enum dma_data_direction direction);
-
static struct sg_table *ion_map_dma_buf(struct dma_buf_attachment *attachment,
enum dma_data_direction direction)
{
struct dma_buf *dmabuf = attachment->dmabuf;
struct ion_buffer *buffer = dmabuf->priv;
- ion_buffer_sync_for_device(buffer, attachment->dev, direction);
return buffer->sg_table;
}
@@ -817,60 +810,11 @@ 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;
};
-static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
- struct device *dev,
- enum dma_data_direction dir)
-{
- struct ion_vma_list *vma_list;
- int pages = PAGE_ALIGN(buffer->size) / PAGE_SIZE;
- int i;
-
- pr_debug("%s: syncing for device %s\n", __func__,
- dev ? dev_name(dev) : "null");
-
- if (!ion_buffer_fault_user_mappings(buffer))
- return;
-
- mutex_lock(&buffer->lock);
- for (i = 0; i < pages; i++) {
- 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);
-
- ion_buffer_page_clean(buffer->pages + i);
- }
- list_for_each_entry(vma_list, &buffer->vmas, list) {
- struct vm_area_struct *vma = vma_list->vma;
-
- zap_page_range(vma, vma->vm_start, vma->vm_end - vma->vm_start,
- NULL);
- }
- mutex_unlock(&buffer->lock);
-}
-
static int ion_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct ion_buffer *buffer = vma->vm_private_data;
@@ -1135,30 +1079,6 @@ 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.h b/drivers/staging/android/ion/ion.h
index 93dafb4..3b4bff5 100644
--- a/drivers/staging/android/ion/ion.h
+++ b/drivers/staging/android/ion/ion.h
@@ -45,7 +45,6 @@ struct ion_buffer;
* @name: used for debug purposes
* @base: base address of heap in physical memory if applicable
* @size: size of the heap in bytes if applicable
- * @align: required alignment in physical memory if applicable
* @priv: private info passed from the board file
*
* Provided by the board file.
@@ -93,8 +92,6 @@ void ion_client_destroy(struct ion_client *client);
* ion_alloc - allocate ion memory
* @client: the client
* @len: size of the allocation
- * @align: requested allocation alignment, lots of hardware blocks
- * have alignment requirements of some kind
* @heap_id_mask: mask of heaps to allocate from, if multiple bits are set
* heaps will be tried in order from highest to lowest
* id
@@ -106,7 +103,7 @@ void ion_client_destroy(struct ion_client *client);
* an opaque handle to it.
*/
struct ion_handle *ion_alloc(struct ion_client *client, size_t len,
- size_t align, unsigned int heap_id_mask,
+ unsigned int heap_id_mask,
unsigned int flags);
/**
diff --git a/drivers/staging/android/ion/ion_carveout_heap.c b/drivers/staging/android/ion/ion_carveout_heap.c
index a8ea973..e0e360f 100644
--- a/drivers/staging/android/ion/ion_carveout_heap.c
+++ b/drivers/staging/android/ion/ion_carveout_heap.c
@@ -34,8 +34,7 @@ struct ion_carveout_heap {
};
static ion_phys_addr_t ion_carveout_allocate(struct ion_heap *heap,
- unsigned long size,
- unsigned long align)
+ unsigned long size)
{
struct ion_carveout_heap *carveout_heap =
container_of(heap, struct ion_carveout_heap, heap);
@@ -60,16 +59,13 @@ static void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr,
static int ion_carveout_heap_allocate(struct ion_heap *heap,
struct ion_buffer *buffer,
- unsigned long size, unsigned long align,
+ unsigned long size,
unsigned long flags)
{
struct sg_table *table;
ion_phys_addr_t paddr;
int ret;
- if (align > PAGE_SIZE)
- return -EINVAL;
-
table = kmalloc(sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
@@ -77,7 +73,7 @@ static int ion_carveout_heap_allocate(struct ion_heap *heap,
if (ret)
goto err_free;
- paddr = ion_carveout_allocate(heap, size, align);
+ paddr = ion_carveout_allocate(heap, size);
if (paddr == ION_CARVEOUT_ALLOCATE_FAIL) {
ret = -ENOMEM;
goto err_free_table;
@@ -104,10 +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);
@@ -132,8 +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 70495dc..46e13f6 100644
--- a/drivers/staging/android/ion/ion_chunk_heap.c
+++ b/drivers/staging/android/ion/ion_chunk_heap.c
@@ -35,7 +35,7 @@ struct ion_chunk_heap {
static int ion_chunk_heap_allocate(struct ion_heap *heap,
struct ion_buffer *buffer,
- unsigned long size, unsigned long align,
+ unsigned long size,
unsigned long flags)
{
struct ion_chunk_heap *chunk_heap =
@@ -46,9 +46,6 @@ static int ion_chunk_heap_allocate(struct ion_heap *heap,
unsigned long num_chunks;
unsigned long allocated_size;
- if (align > chunk_heap->chunk_size)
- return -EINVAL;
-
allocated_size = ALIGN(size, chunk_heap->chunk_size);
num_chunks = allocated_size / chunk_heap->chunk_size;
@@ -104,10 +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);
@@ -135,8 +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);
@@ -160,8 +151,8 @@ struct ion_heap *ion_chunk_heap_create(struct ion_platform_heap *heap_data)
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 %lu size %zu align %ld\n", __func__,
- chunk_heap->base, heap_data->size, heap_data->align);
+ pr_debug("%s: base %lu size %zu \n", __func__,
+ chunk_heap->base, heap_data->size);
return &chunk_heap->heap;
diff --git a/drivers/staging/android/ion/ion_cma_heap.c b/drivers/staging/android/ion/ion_cma_heap.c
index 6c7de74..81780ed 100644
--- a/drivers/staging/android/ion/ion_cma_heap.c
+++ b/drivers/staging/android/ion/ion_cma_heap.c
@@ -42,7 +42,7 @@ struct ion_cma_buffer_info {
/* ION CMA heap operations functions */
static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer,
- unsigned long len, unsigned long align,
+ unsigned long len,
unsigned long flags)
{
struct ion_cma_heap *cma_heap = to_cma_heap(heap);
@@ -54,9 +54,6 @@ static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer,
if (buffer->flags & ION_FLAG_CACHED)
return -EINVAL;
- if (align > PAGE_SIZE)
- return -EINVAL;
-
info = kzalloc(sizeof(struct ion_cma_buffer_info), GFP_KERNEL);
if (!info)
return ION_CMA_ALLOCATE_FAILED;
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_priv.h b/drivers/staging/android/ion/ion_priv.h
index 3c3b324..869a948 100644
--- a/drivers/staging/android/ion/ion_priv.h
+++ b/drivers/staging/android/ion/ion_priv.h
@@ -44,7 +44,6 @@
* @lock: protects the buffers cnt fields
* @kmap_cnt: number of times the buffer is mapped to the kernel
* @vaddr: the kernel mapping if kmap_cnt is not zero
- * @dmap_cnt: number of times the buffer is mapped for dma
* @sg_table: the sg table for the buffer if dmap_cnt is not zero
* @pages: flat array of pages in the buffer -- used by fault
* handler and only valid for buffers that are faulted in
@@ -70,7 +69,6 @@ struct ion_buffer {
struct mutex lock;
int kmap_cnt;
void *vaddr;
- int dmap_cnt;
struct sg_table *sg_table;
struct page **pages;
struct list_head vmas;
@@ -174,7 +172,7 @@ struct ion_handle {
struct ion_heap_ops {
int (*allocate)(struct ion_heap *heap,
struct ion_buffer *buffer, unsigned long len,
- unsigned long align, unsigned long flags);
+ unsigned long flags);
void (*free)(struct ion_buffer *buffer);
void * (*map_kernel)(struct ion_heap *heap, struct ion_buffer *buffer);
void (*unmap_kernel)(struct ion_heap *heap, struct ion_buffer *buffer);
diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index 3ebbb75..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;
}
@@ -129,7 +126,7 @@ static struct page *alloc_largest_available(struct ion_system_heap *heap,
static int ion_system_heap_allocate(struct ion_heap *heap,
struct ion_buffer *buffer,
- unsigned long size, unsigned long align,
+ unsigned long size,
unsigned long flags)
{
struct ion_system_heap *sys_heap = container_of(heap,
@@ -143,9 +140,6 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
unsigned long size_remaining = PAGE_ALIGN(size);
unsigned int max_order = orders[0];
- if (align > PAGE_SIZE)
- return -EINVAL;
-
if (size / PAGE_SIZE > totalram_pages / 2)
return -ENOMEM;
@@ -372,7 +366,6 @@ void ion_system_heap_destroy(struct ion_heap *heap)
static int ion_system_contig_heap_allocate(struct ion_heap *heap,
struct ion_buffer *buffer,
unsigned long len,
- unsigned long align,
unsigned long flags)
{
int order = get_order(len);
@@ -381,9 +374,6 @@ static int ion_system_contig_heap_allocate(struct ion_heap *heap,
unsigned long i;
int ret;
- if (align > (PAGE_SIZE << order))
- return -EINVAL;
-
page = alloc_pages(low_order_gfp_flags, order);
if (!page)
return -ENOMEM;
@@ -408,8 +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