[PATCH] staging: android: ion: add buffer flag update ioctl
In some usecases, the buffer cached attribute is not determined at
allocation time, it's determined just before the real cpu mapping.
And from the memory view of point, a buffer should not have the cached
attribute util is really mapped by the cpu. So in this patch, we
introduced the new ioctl command to target the requirement.
Signed-off-by: Zeng Tao
---
drivers/staging/android/ion/ion-ioctl.c | 4
drivers/staging/android/ion/ion.c | 17 +
drivers/staging/android/ion/ion.h | 1 +
drivers/staging/android/uapi/ion.h | 22 ++
4 files changed, 44 insertions(+)
diff --git a/drivers/staging/android/ion/ion-ioctl.c
b/drivers/staging/android/ion/ion-ioctl.c
index a8d3cc4..60bb702 100644
--- a/drivers/staging/android/ion/ion-ioctl.c
+++ b/drivers/staging/android/ion/ion-ioctl.c
@@ -12,6 +12,7 @@
union ion_ioctl_arg {
struct ion_allocation_data allocation;
+ struct ion_buffer_flag_data update;
struct ion_heap_query query;
};
@@ -83,6 +84,9 @@ long ion_ioctl(struct file *filp, unsigned int cmd, unsigned
long arg)
break;
}
+ case ION_IOC_BUFFER_UPDATE:
+ ret = ion_buffer_update(data.update.fd, data.update.flags);
+ break;
case ION_IOC_HEAP_QUERY:
ret = ion_query_heaps(&data.query);
break;
diff --git a/drivers/staging/android/ion/ion.c
b/drivers/staging/android/ion/ion.c
index 9907332..f1404dc 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -436,6 +436,23 @@ int ion_alloc(size_t len, unsigned int heap_id_mask,
unsigned int flags)
return fd;
}
+int ion_buffer_update(unsigned int fd, unsigned int flags)
+{
+ struct dma_buf *dmabuf;
+ struct ion_buffer *buffer;
+
+ dmabuf = dma_buf_get(fd);
+
+ if (!dmabuf)
+ return -EINVAL;
+
+ buffer = dmabuf->priv;
+ buffer->flags = flags;
+ dma_buf_put(dmabuf);
+
+ return 0;
+}
+
int ion_query_heaps(struct ion_heap_query *query)
{
struct ion_device *dev = internal_dev;
diff --git a/drivers/staging/android/ion/ion.h
b/drivers/staging/android/ion/ion.h
index c006fc1..99bf9ab 100644
--- a/drivers/staging/android/ion/ion.h
+++ b/drivers/staging/android/ion/ion.h
@@ -199,6 +199,7 @@ int ion_heap_pages_zero(struct page *page, size_t size,
pgprot_t pgprot);
int ion_alloc(size_t len,
unsigned int heap_id_mask,
unsigned int flags);
+int ion_buffer_update(unsigned int fd, unsigned int flags);
/**
* ion_heap_init_shrinker
diff --git a/drivers/staging/android/uapi/ion.h
b/drivers/staging/android/uapi/ion.h
index 5d70098..99753fc 100644
--- a/drivers/staging/android/uapi/ion.h
+++ b/drivers/staging/android/uapi/ion.h
@@ -74,6 +74,20 @@ struct ion_allocation_data {
__u32 unused;
};
+/**
+ * struct ion_buffer_flag_data - metadata passed from userspace for update
+ * buffer flags
+ * @fd:file descriptor of the buffer
+ * @flags: flags passed to the buffer
+ *
+ * Provided by userspace as an argument to the ioctl
+ */
+
+struct ion_buffer_flag_data {
+ __u32 fd;
+ __u32 flags;
+}
+
#define MAX_HEAP_NAME 32
/**
@@ -116,6 +130,14 @@ struct ion_heap_query {
struct ion_allocation_data)
/**
+ * DOC: ION_IOC_BUFFER_UPDATE - update the specified ion buffer flags
+ *
+ * Takes an ion_buffer_flag_data structure and returns the result of the
+ * buffer flag update operation.
+ */
+#define ION_IOC_BUFFER_UPDATE _IOWR(ION_IOC_MAGIC, 1, \
+ struct ion_buffer_flag_data)
+/**
* DOC: ION_IOC_HEAP_QUERY - information about available heaps
*
* Takes an ion_heap_query structure and populates information about
--
2.7.4
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[PATCH] staging: android: ion: refactory ion_alloc for kernel driver use
There are two reasons for this patch:
1. There are some potential requirements for ion_alloc in kernel space,
some media drivers need to allocate media buffers from ion instead of
buddy or dma framework, this is more convient and clean very for media
drivers. And In that case, ion is the only media buffer provider, it's
more easier to maintain.
2. Fd is only needed by user processes, not the kernel space, so dma_buf
should be returned instead of fd for kernel space, and dma_buf_fd should
be called only for userspace api.
Signed-off-by: Zeng Tao
---
drivers/staging/android/ion/ion.c | 32 +---
1 file changed, 17 insertions(+), 15 deletions(-)
diff --git a/drivers/staging/android/ion/ion.c
b/drivers/staging/android/ion/ion.c
index 92c2914..e93fb49 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -387,13 +387,13 @@ static const struct dma_buf_ops dma_buf_ops = {
.unmap = ion_dma_buf_kunmap,
};
-static int ion_alloc(size_t len, unsigned int heap_id_mask, unsigned int flags)
+struct dma_buf *ion_alloc(size_t len, unsigned int heap_id_mask,
+ unsigned int flags)
{
struct ion_device *dev = internal_dev;
struct ion_buffer *buffer = NULL;
struct ion_heap *heap;
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
- int fd;
struct dma_buf *dmabuf;
pr_debug("%s: len %zu heap_id_mask %u flags %x\n", __func__,
@@ -407,7 +407,7 @@ static int ion_alloc(size_t len, unsigned int heap_id_mask,
unsigned int flags)
len = PAGE_ALIGN(len);
if (!len)
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
down_read(&dev->lock);
plist_for_each_entry(heap, &dev->heaps, node) {
@@ -421,10 +421,10 @@ static int ion_alloc(size_t len, unsigned int
heap_id_mask, unsigned int flags)
up_read(&dev->lock);
if (!buffer)
- return -ENODEV;
+ return ERR_PTR(-ENODEV);
if (IS_ERR(buffer))
- return PTR_ERR(buffer);
+ return ERR_PTR(PTR_ERR(buffer));
exp_info.ops = &dma_buf_ops;
exp_info.size = buffer->size;
@@ -432,17 +432,12 @@ static int ion_alloc(size_t len, unsigned int
heap_id_mask, unsigned int flags)
exp_info.priv = buffer;
dmabuf = dma_buf_export(&exp_info);
- if (IS_ERR(dmabuf)) {
+ if (IS_ERR(dmabuf))
_ion_buffer_destroy(buffer);
- return PTR_ERR(dmabuf);
- }
- fd = dma_buf_fd(dmabuf, O_CLOEXEC);
- if (fd < 0)
- dma_buf_put(dmabuf);
-
- return fd;
+ return dmabuf;
}
+EXPORT_SYMBOL(ion_alloc);
static int ion_query_heaps(struct ion_heap_query *query)
{
@@ -539,12 +534,19 @@ static long ion_ioctl(struct file *filp, unsigned int
cmd, unsigned long arg)
case ION_IOC_ALLOC:
{
int fd;
+ struct dma_buf *dmabuf;
- fd = ion_alloc(data.allocation.len,
+ dmabuf = ion_alloc(data.allocation.len,
data.allocation.heap_id_mask,
data.allocation.flags);
- if (fd < 0)
+ if (IS_ERR(dmabuf))
+ return PTR_ERR(dmabuf);
+
+ fd = dma_buf_fd(dmabuf, O_CLOEXEC);
+ if (fd < 0) {
+ dma_buf_put(dmabuf);
return fd;
+ }
data.allocation.fd = fd;
--
2.7.4
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[PATCH] staging: ion : ion_cma_heap: fix bug for highmem cma
when cma is located in highmem, virt_to_page will not
work the right way, use pfn_to_page instead.
Signed-off-by: Zeng Tao
---
drivers/staging/android/ion/ion_cma_heap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/android/ion/ion_cma_heap.c
b/drivers/staging/android/ion/ion_cma_heap.c
index f8cabcb..cc45fc0 100644
--- a/drivers/staging/android/ion/ion_cma_heap.c
+++ b/drivers/staging/android/ion/ion_cma_heap.c
@@ -47,7 +47,7 @@ struct ion_cma_buffer_info {
static int ion_cma_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t handle, size_t size)
{
- struct page *page = virt_to_page(cpu_addr);
+ struct page *page = pfn_to_page(handle >> PAGE_SHIFT);
int ret;
ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
--
1.9.1
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[PATCH] staging: ion: ion_cma_heap: remove ion_cma_get_sgtable
Remove the temporary code ion_cma_get_sgtable,
use dma_common_get_sgtable instead
Signed-off-by: Zeng Tao
---
drivers/staging/android/ion/ion_cma_heap.c | 20 +---
1 file changed, 1 insertion(+), 19 deletions(-)
diff --git a/drivers/staging/android/ion/ion_cma_heap.c
b/drivers/staging/android/ion/ion_cma_heap.c
index f8cabcb..f4211f1 100644
--- a/drivers/staging/android/ion/ion_cma_heap.c
+++ b/drivers/staging/android/ion/ion_cma_heap.c
@@ -39,24 +39,6 @@ struct ion_cma_buffer_info {
struct sg_table *table;
};
-/*
- * Create scatter-list for the already allocated DMA buffer.
- * This function could be replaced by dma_common_get_sgtable
- * as soon as it will avalaible.
- */
-static int ion_cma_get_sgtable(struct device *dev, struct sg_table *sgt,
- void *cpu_addr, dma_addr_t handle, size_t size)
-{
- struct page *page = virt_to_page(cpu_addr);
- int ret;
-
- ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
- if (unlikely(ret))
- return ret;
-
- sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0);
- return 0;
-}
/* ION CMA heap operations functions */
static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer,
@@ -91,7 +73,7 @@ static int ion_cma_allocate(struct ion_heap *heap, struct
ion_buffer *buffer,
if (!info->table)
goto free_mem;
- if (ion_cma_get_sgtable
+ if (dma_common_get_sgtable
(dev, info->table, info->cpu_addr, info->handle, len))
goto free_table;
/* keep this for memory release */
--
1.9.1
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[PATCH] ION: Sys_heap: fix the incorrect pool->gfp_mask setting
This issue is introduced by the commit ("ION: Sys_heap:
Add cached pool to spead up cached buffer alloc"), the gfp_mask low
order pool is overlapped by the high order inside the loop, so the
gfp_mask of all pools are set to high_order_gfp_flags.
Signed-off-by: Zeng Tao
---
drivers/staging/android/ion/ion_system_heap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/android/ion/ion_system_heap.c
b/drivers/staging/android/ion/ion_system_heap.c
index 4dc5d7a..b6386be 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -298,10 +298,10 @@ static int ion_system_heap_create_pools(struct
ion_page_pool **pools,
bool cached)
{
int i;
- gfp_t gfp_flags = low_order_gfp_flags;
for (i = 0; i < NUM_ORDERS; i++) {
struct ion_page_pool *pool;
+ gfp_t gfp_flags = low_order_gfp_flags;
if (orders[i] > 4)
gfp_flags = high_order_gfp_flags;
--
2.7.4
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[PATCH v2] ION: Sys_heap: fix the incorrect pool->gfp_mask setting
The gfp_mask low order pool is overlapped by the high order
inside the loop, so the gfp_mask of all pools are set to
high_order_gfp_flags. And all the allcations will have no __GFP_RECLAIM
flag, we will easily get the allocation failure problem with
memory presure.
Changes since v1:
1. fix the tag
2. change the flags define based on the comment.
Fixes: e7f63771b60e ("ION: Sys_heap: Add cached pool to spead up cached buffer
alloc")
Signed-off-by: Zeng Tao
---
drivers/staging/android/ion/ion_system_heap.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/android/ion/ion_system_heap.c
b/drivers/staging/android/ion/ion_system_heap.c
index 4dc5d7a..12d0801 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -305,6 +305,8 @@ static int ion_system_heap_create_pools(struct
ion_page_pool **pools,
if (orders[i] > 4)
gfp_flags = high_order_gfp_flags;
+ else
+ gfp_flags = low_order_gfp_flags;
pool = ion_page_pool_create(gfp_flags, orders[i], cached);
if (!pool)
--
2.7.4
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