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Subject[RFC PATCH 50/60] hyper_dmabuf: fix styling err and warns caught by checkpatch.pl
Date
Fixing all styling problems caught by checkpatch.pl

Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
---
drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c | 53 ++--
drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h | 6 +-
drivers/xen/hyper_dmabuf/hyper_dmabuf_event.c | 12 +-
drivers/xen/hyper_dmabuf/hyper_dmabuf_id.c | 24 +-
drivers/xen/hyper_dmabuf/hyper_dmabuf_id.h | 4 +-
drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c | 308 +++++++++++----------
drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.h | 5 +-
drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.c | 132 ++++-----
drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.h | 4 +-
drivers/xen/hyper_dmabuf/hyper_dmabuf_ops.c | 58 ++--
drivers/xen/hyper_dmabuf/hyper_dmabuf_query.c | 236 ++++++++--------
.../xen/hyper_dmabuf/hyper_dmabuf_remote_sync.c | 81 +++---
drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.c | 15 +-
drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.h | 2 +-
drivers/xen/hyper_dmabuf/hyper_dmabuf_struct.h | 78 ++++--
.../xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.c | 154 +++++------
.../xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.h | 21 +-
.../hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.c | 21 +-
.../hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.h | 16 +-
.../xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.h | 19 +-
.../xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.c | 128 +++++----
.../xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.h | 15 +-
include/uapi/xen/hyper_dmabuf.h | 26 +-
23 files changed, 739 insertions(+), 679 deletions(-)

diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c
index 525ee78..023d7f4 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c
@@ -44,7 +44,6 @@

#ifdef CONFIG_HYPER_DMABUF_XEN
#include "xen/hyper_dmabuf_xen_drv.h"
-extern struct hyper_dmabuf_backend_ops xen_backend_ops;
#endif

MODULE_LICENSE("GPL and additional rights");
@@ -52,14 +51,11 @@ MODULE_AUTHOR("Intel Corporation");

struct hyper_dmabuf_private *hy_drv_priv;

-long hyper_dmabuf_ioctl(struct file *filp,
- unsigned int cmd, unsigned long param);
-
-static void hyper_dmabuf_force_free(struct exported_sgt_info* exported,
- void *attr)
+static void hyper_dmabuf_force_free(struct exported_sgt_info *exported,
+ void *attr)
{
struct ioctl_hyper_dmabuf_unexport unexport_attr;
- struct file *filp = (struct file*) attr;
+ struct file *filp = (struct file *)attr;

if (!filp || !exported)
return;
@@ -97,7 +93,8 @@ int hyper_dmabuf_release(struct inode *inode, struct file *filp)

#ifdef CONFIG_HYPER_DMABUF_EVENT_GEN

-unsigned int hyper_dmabuf_event_poll(struct file *filp, struct poll_table_struct *wait)
+unsigned int hyper_dmabuf_event_poll(struct file *filp,
+ struct poll_table_struct *wait)
{
unsigned int mask = 0;

@@ -153,15 +150,17 @@ ssize_t hyper_dmabuf_event_read(struct file *filp, char __user *buffer,

mutex_unlock(&hy_drv_priv->event_read_lock);
ret = wait_event_interruptible(hy_drv_priv->event_wait,
- !list_empty(&hy_drv_priv->event_list));
+ !list_empty(&hy_drv_priv->event_list));

if (ret == 0)
- ret = mutex_lock_interruptible(&hy_drv_priv->event_read_lock);
+ ret = mutex_lock_interruptible(
+ &hy_drv_priv->event_read_lock);

if (ret)
return ret;
} else {
- unsigned length = (sizeof(struct hyper_dmabuf_event_hdr) + e->event_data.hdr.size);
+ unsigned int length = (sizeof(e->event_data.hdr) +
+ e->event_data.hdr.size);

if (length > count - ret) {
put_back_event:
@@ -172,20 +171,22 @@ ssize_t hyper_dmabuf_event_read(struct file *filp, char __user *buffer,
}

if (copy_to_user(buffer + ret, &e->event_data.hdr,
- sizeof(struct hyper_dmabuf_event_hdr))) {
+ sizeof(e->event_data.hdr))) {
if (ret == 0)
ret = -EFAULT;

goto put_back_event;
}

- ret += sizeof(struct hyper_dmabuf_event_hdr);
+ ret += sizeof(e->event_data.hdr);

- if (copy_to_user(buffer + ret, e->event_data.data, e->event_data.hdr.size)) {
+ if (copy_to_user(buffer + ret, e->event_data.data,
+ e->event_data.hdr.size)) {
/* error while copying void *data */

struct hyper_dmabuf_event_hdr dummy_hdr = {0};
- ret -= sizeof(struct hyper_dmabuf_event_hdr);
+
+ ret -= sizeof(e->event_data.hdr);

/* nullifying hdr of the event in user buffer */
if (copy_to_user(buffer + ret, &dummy_hdr,
@@ -212,8 +213,7 @@ ssize_t hyper_dmabuf_event_read(struct file *filp, char __user *buffer,

#endif

-static struct file_operations hyper_dmabuf_driver_fops =
-{
+static const struct file_operations hyper_dmabuf_driver_fops = {
.owner = THIS_MODULE,
.open = hyper_dmabuf_open,
.release = hyper_dmabuf_release,
@@ -246,7 +246,7 @@ int register_device(void)

hy_drv_priv->dev = hyper_dmabuf_miscdev.this_device;

- /* TODO: Check if there is a different way to initialize dma mask nicely */
+ /* TODO: Check if there is a different way to initialize dma mask */
dma_coerce_mask_and_coherent(hy_drv_priv->dev, DMA_BIT_MASK(64));

return ret;
@@ -264,32 +264,30 @@ static int __init hyper_dmabuf_drv_init(void)
{
int ret = 0;

- printk( KERN_NOTICE "hyper_dmabuf_starting: Initialization started\n");
+ printk(KERN_NOTICE "hyper_dmabuf_starting: Initialization started\n");

hy_drv_priv = kcalloc(1, sizeof(struct hyper_dmabuf_private),
GFP_KERNEL);

if (!hy_drv_priv) {
- printk( KERN_ERR "hyper_dmabuf: Failed to create drv\n");
+ printk(KERN_ERR "hyper_dmabuf: Failed to create drv\n");
return -1;
}

ret = register_device();
- if (ret < 0) {
+ if (ret < 0)
return ret;
- }

/* currently only supports XEN hypervisor */
-
#ifdef CONFIG_HYPER_DMABUF_XEN
hy_drv_priv->backend_ops = &xen_backend_ops;
#else
hy_drv_priv->backend_ops = NULL;
- printk( KERN_ERR "hyper_dmabuf drv currently supports XEN only.\n");
+ printk(KERN_ERR "hyper_dmabuf drv currently supports XEN only.\n");
#endif

if (hy_drv_priv->backend_ops == NULL) {
- printk( KERN_ERR "Hyper_dmabuf: failed to be loaded - no backend found\n");
+ printk(KERN_ERR "Hyper_dmabuf: no backend found\n");
return -1;
}

@@ -385,10 +383,7 @@ static void hyper_dmabuf_drv_exit(void)
dev_info(hy_drv_priv->dev,
"hyper_dmabuf driver: Exiting\n");

- if (hy_drv_priv) {
- kfree(hy_drv_priv);
- hy_drv_priv = NULL;
- }
+ kfree(hy_drv_priv);

unregister_device();
}
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h b/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h
index 2ead41b..049c694 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h
@@ -36,7 +36,7 @@ struct hyper_dmabuf_event {
};

struct hyper_dmabuf_private {
- struct device *dev;
+ struct device *dev;

/* VM(domain) id of current VM instance */
int domid;
@@ -57,8 +57,8 @@ struct hyper_dmabuf_private {
/* flag that shows whether backend is initialized */
bool initialized;

- wait_queue_head_t event_wait;
- struct list_head event_list;
+ wait_queue_head_t event_wait;
+ struct list_head event_list;

spinlock_t event_lock;
struct mutex event_read_lock;
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_event.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_event.c
index 0498cda..a4945af 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_event.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_event.c
@@ -44,7 +44,8 @@ static void hyper_dmabuf_send_event_locked(struct hyper_dmabuf_event *e)
assert_spin_locked(&hy_drv_priv->event_lock);

/* check current number of event then if it hits the max num allowed
- * then remove the oldest event in the list */
+ * then remove the oldest event in the list
+ */
if (hy_drv_priv->pending > MAX_DEPTH_EVENT_QUEUE - 1) {
oldest = list_first_entry(&hy_drv_priv->event_list,
struct hyper_dmabuf_event, link);
@@ -61,7 +62,7 @@ static void hyper_dmabuf_send_event_locked(struct hyper_dmabuf_event *e)
wake_up_interruptible(&hy_drv_priv->event_wait);
}

-void hyper_dmabuf_events_release()
+void hyper_dmabuf_events_release(void)
{
struct hyper_dmabuf_event *e, *et;
unsigned long irqflags;
@@ -100,15 +101,12 @@ int hyper_dmabuf_import_event(hyper_dmabuf_id_t hid)

e = kzalloc(sizeof(*e), GFP_KERNEL);

- if (!e) {
- dev_err(hy_drv_priv->dev,
- "no space left\n");
+ if (!e)
return -ENOMEM;
- }

e->event_data.hdr.event_type = HYPER_DMABUF_NEW_IMPORT;
e->event_data.hdr.hid = hid;
- e->event_data.data = (void*)imported->priv;
+ e->event_data.data = (void *)imported->priv;
e->event_data.hdr.size = imported->sz_priv;

spin_lock_irqsave(&hy_drv_priv->event_lock, irqflags);
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_id.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_id.c
index e2466c7..312dea5 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_id.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_id.c
@@ -40,11 +40,8 @@ void store_reusable_hid(hyper_dmabuf_id_t hid)

new_reusable = kmalloc(sizeof(*new_reusable), GFP_KERNEL);

- if (!new_reusable) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!new_reusable)
return;
- }

new_reusable->hid = hid;

@@ -54,7 +51,7 @@ void store_reusable_hid(hyper_dmabuf_id_t hid)
static hyper_dmabuf_id_t retrieve_reusable_hid(void)
{
struct list_reusable_id *reusable_head = hy_drv_priv->id_queue;
- hyper_dmabuf_id_t hid = {-1, {0,0,0}};
+ hyper_dmabuf_id_t hid = {-1, {0, 0, 0} };

/* check there is reusable id */
if (!list_empty(&reusable_head->list)) {
@@ -92,7 +89,7 @@ void destroy_reusable_list(void)

hyper_dmabuf_id_t hyper_dmabuf_get_hid(void)
{
- static int count = 0;
+ static int count;
hyper_dmabuf_id_t hid;
struct list_reusable_id *reusable_head;

@@ -100,13 +97,11 @@ hyper_dmabuf_id_t hyper_dmabuf_get_hid(void)
if (count == 0) {
reusable_head = kmalloc(sizeof(*reusable_head), GFP_KERNEL);

- if (!reusable_head) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
- return (hyper_dmabuf_id_t){-1, {0,0,0}};
- }
+ if (!reusable_head)
+ return (hyper_dmabuf_id_t){-1, {0, 0, 0} };

- reusable_head->hid.id = -1; /* list head has an invalid count */
+ /* list head has an invalid count */
+ reusable_head->hid.id = -1;
INIT_LIST_HEAD(&reusable_head->list);
hy_drv_priv->id_queue = reusable_head;
}
@@ -116,9 +111,8 @@ hyper_dmabuf_id_t hyper_dmabuf_get_hid(void)
/*creating a new H-ID only if nothing in the reusable id queue
* and count is less than maximum allowed
*/
- if (hid.id == -1 && count < HYPER_DMABUF_ID_MAX) {
+ if (hid.id == -1 && count < HYPER_DMABUF_ID_MAX)
hid.id = HYPER_DMABUF_ID_CREATE(hy_drv_priv->domid, count++);
- }

/* random data embedded in the id for security */
get_random_bytes(&hid.rng_key[0], 12);
@@ -131,7 +125,7 @@ bool hyper_dmabuf_hid_keycomp(hyper_dmabuf_id_t hid1, hyper_dmabuf_id_t hid2)
int i;

/* compare keys */
- for (i=0; i<3; i++) {
+ for (i = 0; i < 3; i++) {
if (hid1.rng_key[i] != hid2.rng_key[i])
return false;
}
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_id.h b/drivers/xen/hyper_dmabuf/hyper_dmabuf_id.h
index a3336d9..61c4fb3 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_id.h
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_id.h
@@ -26,10 +26,10 @@
#define __HYPER_DMABUF_ID_H__

#define HYPER_DMABUF_ID_CREATE(domid, cnt) \
- ((((domid) & 0xFF) << 24) | ((cnt) & 0xFFFFFF))
+ ((((domid) & 0xFF) << 24) | ((cnt) & 0xFFFFFF))

#define HYPER_DMABUF_DOM_ID(hid) \
- (((hid.id) >> 24) & 0xFF)
+ (((hid.id) >> 24) & 0xFF)

/* currently maximum number of buffers shared
* at any given moment is limited to 1000
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
index b328df7..f9040ed 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
@@ -91,7 +91,7 @@ static int hyper_dmabuf_send_export_msg(struct exported_sgt_info *exported,
/* now create request for importer via ring */
op[0] = exported->hid.id;

- for (i=0; i<3; i++)
+ for (i = 0; i < 3; i++)
op[i+1] = exported->hid.rng_key[i];

if (pg_info) {
@@ -113,10 +113,8 @@ static int hyper_dmabuf_send_export_msg(struct exported_sgt_info *exported,

req = kcalloc(1, sizeof(*req), GFP_KERNEL);

- if(!req) {
- dev_err(hy_drv_priv->dev, "no more space left\n");
+ if (!req)
return -1;
- }

/* composing a message to the importer */
hyper_dmabuf_create_req(req, HYPER_DMABUF_EXPORT, &op[0]);
@@ -161,69 +159,71 @@ static int hyper_dmabuf_export_remote_ioctl(struct file *filp, void *data)
export_remote_attr->remote_domain);
if (hid.id != -1) {
exported = hyper_dmabuf_find_exported(hid);
- if (exported != NULL) {
- if (exported->valid) {
- /*
- * Check if unexport is already scheduled for that buffer,
- * if so try to cancel it. If that will fail, buffer needs
- * to be reexport once again.
- */
- if (exported->unexport_sched) {
- if (!cancel_delayed_work_sync(&exported->unexport)) {
- dma_buf_put(dma_buf);
- goto reexport;
- }
- exported->unexport_sched = false;
- }
-
- /* if there's any change in size of private data.
- * we reallocate space for private data with new size */
- if (export_remote_attr->sz_priv != exported->sz_priv) {
- kfree(exported->priv);
-
- /* truncating size */
- if (export_remote_attr->sz_priv > MAX_SIZE_PRIV_DATA) {
- exported->sz_priv = MAX_SIZE_PRIV_DATA;
- } else {
- exported->sz_priv = export_remote_attr->sz_priv;
- }
-
- exported->priv = kcalloc(1, exported->sz_priv, GFP_KERNEL);
-
- if(!exported->priv) {
- dev_err(hy_drv_priv->dev,
- "no more space left for priv\n");
- hyper_dmabuf_remove_exported(exported->hid);
- hyper_dmabuf_cleanup_sgt_info(exported, true);
- kfree(exported);
- dma_buf_put(dma_buf);
- return -ENOMEM;
- }
- }
-
- /* update private data in sgt_info with new ones */
- ret = copy_from_user(exported->priv, export_remote_attr->priv,
- exported->sz_priv);
- if (ret) {
- dev_err(hy_drv_priv->dev,
- "Failed to load a new private data\n");
- ret = -EINVAL;
- } else {
- /* send an export msg for updating priv in importer */
- ret = hyper_dmabuf_send_export_msg(exported, NULL);
-
- if (ret < 0) {
- dev_err(hy_drv_priv->dev,
- "Failed to send a new private data\n");
- ret = -EBUSY;
- }
- }

+ if (!exported)
+ goto reexport;
+
+ if (exported->valid == false)
+ goto reexport;
+
+ /*
+ * Check if unexport is already scheduled for that buffer,
+ * if so try to cancel it. If that will fail, buffer needs
+ * to be reexport once again.
+ */
+ if (exported->unexport_sched) {
+ if (!cancel_delayed_work_sync(&exported->unexport)) {
dma_buf_put(dma_buf);
- export_remote_attr->hid = hid;
- return ret;
+ goto reexport;
}
+ exported->unexport_sched = false;
}
+
+ /* if there's any change in size of private data.
+ * we reallocate space for private data with new size
+ */
+ if (export_remote_attr->sz_priv != exported->sz_priv) {
+ kfree(exported->priv);
+
+ /* truncating size */
+ if (export_remote_attr->sz_priv > MAX_SIZE_PRIV_DATA)
+ exported->sz_priv = MAX_SIZE_PRIV_DATA;
+ else
+ exported->sz_priv = export_remote_attr->sz_priv;
+
+ exported->priv = kcalloc(1, exported->sz_priv,
+ GFP_KERNEL);
+
+ if (!exported->priv) {
+ hyper_dmabuf_remove_exported(exported->hid);
+ hyper_dmabuf_cleanup_sgt_info(exported, true);
+ kfree(exported);
+ dma_buf_put(dma_buf);
+ return -ENOMEM;
+ }
+ }
+
+ /* update private data in sgt_info with new ones */
+ ret = copy_from_user(exported->priv, export_remote_attr->priv,
+ exported->sz_priv);
+ if (ret) {
+ dev_err(hy_drv_priv->dev,
+ "Failed to load a new private data\n");
+ ret = -EINVAL;
+ } else {
+ /* send an export msg for updating priv in importer */
+ ret = hyper_dmabuf_send_export_msg(exported, NULL);
+
+ if (ret < 0) {
+ dev_err(hy_drv_priv->dev,
+ "Failed to send a new private data\n");
+ ret = -EBUSY;
+ }
+ }
+
+ dma_buf_put(dma_buf);
+ export_remote_attr->hid = hid;
+ return ret;
}

reexport:
@@ -244,25 +244,22 @@ static int hyper_dmabuf_export_remote_ioctl(struct file *filp, void *data)

exported = kcalloc(1, sizeof(*exported), GFP_KERNEL);

- if(!exported) {
- dev_err(hy_drv_priv->dev, "no more space left\n");
+ if (!exported) {
ret = -ENOMEM;
goto fail_sgt_info_creation;
}

/* possible truncation */
- if (export_remote_attr->sz_priv > MAX_SIZE_PRIV_DATA) {
+ if (export_remote_attr->sz_priv > MAX_SIZE_PRIV_DATA)
exported->sz_priv = MAX_SIZE_PRIV_DATA;
- } else {
+ else
exported->sz_priv = export_remote_attr->sz_priv;
- }

/* creating buffer for private data of buffer */
- if(exported->sz_priv != 0) {
+ if (exported->sz_priv != 0) {
exported->priv = kcalloc(1, exported->sz_priv, GFP_KERNEL);

- if(!exported->priv) {
- dev_err(hy_drv_priv->dev, "no more space left\n");
+ if (!exported->priv) {
ret = -ENOMEM;
goto fail_priv_creation;
}
@@ -273,7 +270,7 @@ static int hyper_dmabuf_export_remote_ioctl(struct file *filp, void *data)
exported->hid = hyper_dmabuf_get_hid();

/* no more exported dmabuf allowed */
- if(exported->hid.id == -1) {
+ if (exported->hid.id == -1) {
dev_err(hy_drv_priv->dev,
"exceeds allowed number of dmabuf to be exported\n");
ret = -ENOMEM;
@@ -286,28 +283,27 @@ static int hyper_dmabuf_export_remote_ioctl(struct file *filp, void *data)

exported->active_sgts = kmalloc(sizeof(struct sgt_list), GFP_KERNEL);
if (!exported->active_sgts) {
- dev_err(hy_drv_priv->dev, "no more space left\n");
ret = -ENOMEM;
goto fail_map_active_sgts;
}

- exported->active_attached = kmalloc(sizeof(struct attachment_list), GFP_KERNEL);
+ exported->active_attached = kmalloc(sizeof(struct attachment_list),
+ GFP_KERNEL);
if (!exported->active_attached) {
- dev_err(hy_drv_priv->dev, "no more space left\n");
ret = -ENOMEM;
goto fail_map_active_attached;
}

- exported->va_kmapped = kmalloc(sizeof(struct kmap_vaddr_list), GFP_KERNEL);
+ exported->va_kmapped = kmalloc(sizeof(struct kmap_vaddr_list),
+ GFP_KERNEL);
if (!exported->va_kmapped) {
- dev_err(hy_drv_priv->dev, "no more space left\n");
ret = -ENOMEM;
goto fail_map_va_kmapped;
}

- exported->va_vmapped = kmalloc(sizeof(struct vmap_vaddr_list), GFP_KERNEL);
+ exported->va_vmapped = kmalloc(sizeof(struct vmap_vaddr_list),
+ GFP_KERNEL);
if (!exported->va_vmapped) {
- dev_err(hy_drv_priv->dev, "no more space left\n");
ret = -ENOMEM;
goto fail_map_va_vmapped;
}
@@ -436,31 +432,32 @@ static int hyper_dmabuf_export_fd_ioctl(struct file *filp, void *data)
/* send notification for export_fd to exporter */
op[0] = imported->hid.id;

- for (i=0; i<3; i++)
+ for (i = 0; i < 3; i++)
op[i+1] = imported->hid.rng_key[i];

- dev_dbg(hy_drv_priv->dev, "Exporting fd of buffer {id:%d key:%d %d %d}\n",
- imported->hid.id, imported->hid.rng_key[0], imported->hid.rng_key[1],
- imported->hid.rng_key[2]);
+ dev_dbg(hy_drv_priv->dev, "Export FD of buffer {id:%d key:%d %d %d}\n",
+ imported->hid.id, imported->hid.rng_key[0],
+ imported->hid.rng_key[1], imported->hid.rng_key[2]);

req = kcalloc(1, sizeof(*req), GFP_KERNEL);

- if (!req) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!req)
return -ENOMEM;
- }

hyper_dmabuf_create_req(req, HYPER_DMABUF_EXPORT_FD, &op[0]);

ret = ops->send_req(HYPER_DMABUF_DOM_ID(imported->hid), req, true);

if (ret < 0) {
- /* in case of timeout other end eventually will receive request, so we need to undo it */
- hyper_dmabuf_create_req(req, HYPER_DMABUF_EXPORT_FD_FAILED, &op[0]);
+ /* in case of timeout other end eventually will receive request,
+ * so we need to undo it
+ */
+ hyper_dmabuf_create_req(req, HYPER_DMABUF_EXPORT_FD_FAILED,
+ &op[0]);
ops->send_req(op[0], req, false);
kfree(req);
- dev_err(hy_drv_priv->dev, "Failed to create sgt or notify exporter\n");
+ dev_err(hy_drv_priv->dev,
+ "Failed to create sgt or notify exporter\n");
imported->importers--;
mutex_unlock(&hy_drv_priv->lock);
return ret;
@@ -471,64 +468,69 @@ static int hyper_dmabuf_export_fd_ioctl(struct file *filp, void *data)
if (ret == HYPER_DMABUF_REQ_ERROR) {
dev_err(hy_drv_priv->dev,
"Buffer invalid {id:%d key:%d %d %d}, cannot import\n",
- imported->hid.id, imported->hid.rng_key[0], imported->hid.rng_key[1],
- imported->hid.rng_key[2]);
+ imported->hid.id, imported->hid.rng_key[0],
+ imported->hid.rng_key[1], imported->hid.rng_key[2]);

imported->importers--;
mutex_unlock(&hy_drv_priv->lock);
return -EINVAL;
- } else {
- dev_dbg(hy_drv_priv->dev, "Can import buffer {id:%d key:%d %d %d}\n",
- imported->hid.id, imported->hid.rng_key[0], imported->hid.rng_key[1],
- imported->hid.rng_key[2]);
-
- ret = 0;
}

+ ret = 0;
+
+ dev_dbg(hy_drv_priv->dev,
+ "Found buffer gref %d off %d\n",
+ imported->ref_handle, imported->frst_ofst);
+
dev_dbg(hy_drv_priv->dev,
- "%s Found buffer gref %d off %d last len %d nents %d domain %d\n",
- __func__, imported->ref_handle, imported->frst_ofst,
- imported->last_len, imported->nents, HYPER_DMABUF_DOM_ID(imported->hid));
+ "last len %d nents %d domain %d\n",
+ imported->last_len, imported->nents,
+ HYPER_DMABUF_DOM_ID(imported->hid));

if (!imported->sgt) {
dev_dbg(hy_drv_priv->dev,
- "%s buffer {id:%d key:%d %d %d} pages not mapped yet\n", __func__,
- imported->hid.id, imported->hid.rng_key[0], imported->hid.rng_key[1],
- imported->hid.rng_key[2]);
+ "buffer {id:%d key:%d %d %d} pages not mapped yet\n",
+ imported->hid.id, imported->hid.rng_key[0],
+ imported->hid.rng_key[1], imported->hid.rng_key[2]);

data_pgs = ops->map_shared_pages(imported->ref_handle,
- HYPER_DMABUF_DOM_ID(imported->hid),
- imported->nents,
- &imported->refs_info);
+ HYPER_DMABUF_DOM_ID(imported->hid),
+ imported->nents,
+ &imported->refs_info);

if (!data_pgs) {
dev_err(hy_drv_priv->dev,
- "Cannot map pages of buffer {id:%d key:%d %d %d}\n",
- imported->hid.id, imported->hid.rng_key[0], imported->hid.rng_key[1],
+ "can't map pages hid {id:%d key:%d %d %d}\n",
+ imported->hid.id, imported->hid.rng_key[0],
+ imported->hid.rng_key[1],
imported->hid.rng_key[2]);

imported->importers--;
+
req = kcalloc(1, sizeof(*req), GFP_KERNEL);

- if (!req) {
- dev_err(hy_drv_priv->dev,
- "No more space left\n");
+ if (!req)
return -ENOMEM;
- }

- hyper_dmabuf_create_req(req, HYPER_DMABUF_EXPORT_FD_FAILED, &op[0]);
- ops->send_req(HYPER_DMABUF_DOM_ID(imported->hid), req, false);
+ hyper_dmabuf_create_req(req,
+ HYPER_DMABUF_EXPORT_FD_FAILED,
+ &op[0]);
+ ops->send_req(HYPER_DMABUF_DOM_ID(imported->hid), req,
+ false);
kfree(req);
mutex_unlock(&hy_drv_priv->lock);
return -EINVAL;
}

- imported->sgt = hyper_dmabuf_create_sgt(data_pgs, imported->frst_ofst,
- imported->last_len, imported->nents);
+ imported->sgt = hyper_dmabuf_create_sgt(data_pgs,
+ imported->frst_ofst,
+ imported->last_len,
+ imported->nents);

}

- export_fd_attr->fd = hyper_dmabuf_export_fd(imported, export_fd_attr->flags);
+ export_fd_attr->fd = hyper_dmabuf_export_fd(imported,
+ export_fd_attr->flags);

if (export_fd_attr->fd < 0) {
/* fail to get fd */
@@ -566,21 +568,19 @@ static void hyper_dmabuf_delayed_unexport(struct work_struct *work)

req = kcalloc(1, sizeof(*req), GFP_KERNEL);

- if (!req) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!req)
return;
- }

op[0] = exported->hid.id;

- for (i=0; i<3; i++)
+ for (i = 0; i < 3; i++)
op[i+1] = exported->hid.rng_key[i];

hyper_dmabuf_create_req(req, HYPER_DMABUF_NOTIFY_UNEXPORT, &op[0]);

/* Now send unexport request to remote domain, marking
- * that buffer should not be used anymore */
+ * that buffer should not be used anymore
+ */
ret = ops->send_req(exported->rdomid, req, true);
if (ret < 0) {
dev_err(hy_drv_priv->dev,
@@ -589,12 +589,10 @@ static void hyper_dmabuf_delayed_unexport(struct work_struct *work)
exported->hid.rng_key[1], exported->hid.rng_key[2]);
}

- /* free msg */
kfree(req);
exported->unexport_sched = false;

- /*
- * Immediately clean-up if it has never been exported by importer
+ /* Immediately clean-up if it has never been exported by importer
* (so no SGT is constructed on importer).
* clean it up later in remote sync when final release ops
* is called (importer does this only when there's no
@@ -669,25 +667,31 @@ static int hyper_dmabuf_query_ioctl(struct file *filp, void *data)
exported = hyper_dmabuf_find_exported(query_attr->hid);
if (exported) {
ret = hyper_dmabuf_query_exported(exported,
- query_attr->item, &query_attr->info);
+ query_attr->item,
+ &query_attr->info);
} else {
dev_err(hy_drv_priv->dev,
- "DMA BUF {id:%d key:%d %d %d} not in the export list\n",
- query_attr->hid.id, query_attr->hid.rng_key[0],
- query_attr->hid.rng_key[1], query_attr->hid.rng_key[2]);
+ "hid {id:%d key:%d %d %d} not in exp list\n",
+ query_attr->hid.id,
+ query_attr->hid.rng_key[0],
+ query_attr->hid.rng_key[1],
+ query_attr->hid.rng_key[2]);
return -ENOENT;
}
} else {
/* query for imported dmabuf */
imported = hyper_dmabuf_find_imported(query_attr->hid);
if (imported) {
- ret = hyper_dmabuf_query_imported(imported, query_attr->item,
+ ret = hyper_dmabuf_query_imported(imported,
+ query_attr->item,
&query_attr->info);
} else {
dev_err(hy_drv_priv->dev,
- "DMA BUF {id:%d key:%d %d %d} not in the imported list\n",
- query_attr->hid.id, query_attr->hid.rng_key[0],
- query_attr->hid.rng_key[1], query_attr->hid.rng_key[2]);
+ "hid {id:%d key:%d %d %d} not in imp list\n",
+ query_attr->hid.id,
+ query_attr->hid.rng_key[0],
+ query_attr->hid.rng_key[1],
+ query_attr->hid.rng_key[2]);
return -ENOENT;
}
}
@@ -696,12 +700,18 @@ static int hyper_dmabuf_query_ioctl(struct file *filp, void *data)
}

const struct hyper_dmabuf_ioctl_desc hyper_dmabuf_ioctls[] = {
- HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_TX_CH_SETUP, hyper_dmabuf_tx_ch_setup_ioctl, 0),
- HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_RX_CH_SETUP, hyper_dmabuf_rx_ch_setup_ioctl, 0),
- HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_EXPORT_REMOTE, hyper_dmabuf_export_remote_ioctl, 0),
- HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_EXPORT_FD, hyper_dmabuf_export_fd_ioctl, 0),
- HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_UNEXPORT, hyper_dmabuf_unexport_ioctl, 0),
- HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_QUERY, hyper_dmabuf_query_ioctl, 0),
+ HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_TX_CH_SETUP,
+ hyper_dmabuf_tx_ch_setup_ioctl, 0),
+ HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_RX_CH_SETUP,
+ hyper_dmabuf_rx_ch_setup_ioctl, 0),
+ HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_EXPORT_REMOTE,
+ hyper_dmabuf_export_remote_ioctl, 0),
+ HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_EXPORT_FD,
+ hyper_dmabuf_export_fd_ioctl, 0),
+ HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_UNEXPORT,
+ hyper_dmabuf_unexport_ioctl, 0),
+ HYPER_DMABUF_IOCTL_DEF(IOCTL_HYPER_DMABUF_QUERY,
+ hyper_dmabuf_query_ioctl, 0),
};

long hyper_dmabuf_ioctl(struct file *filp,
@@ -728,21 +738,23 @@ long hyper_dmabuf_ioctl(struct file *filp,
}

kdata = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
- if (!kdata) {
- dev_err(hy_drv_priv->dev, "no memory\n");
+ if (!kdata)
return -ENOMEM;
- }

- if (copy_from_user(kdata, (void __user *)param, _IOC_SIZE(cmd)) != 0) {
- dev_err(hy_drv_priv->dev, "failed to copy from user arguments\n");
+ if (copy_from_user(kdata, (void __user *)param,
+ _IOC_SIZE(cmd)) != 0) {
+ dev_err(hy_drv_priv->dev,
+ "failed to copy from user arguments\n");
ret = -EFAULT;
goto ioctl_error;
}

ret = func(filp, kdata);

- if (copy_to_user((void __user *)param, kdata, _IOC_SIZE(cmd)) != 0) {
- dev_err(hy_drv_priv->dev, "failed to copy to user arguments\n");
+ if (copy_to_user((void __user *)param, kdata,
+ _IOC_SIZE(cmd)) != 0) {
+ dev_err(hy_drv_priv->dev,
+ "failed to copy to user arguments\n");
ret = -EFAULT;
goto ioctl_error;
}
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.h b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.h
index 3e9470a..5991a87 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.h
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.h
@@ -34,7 +34,7 @@ struct hyper_dmabuf_ioctl_desc {
const char *name;
};

-#define HYPER_DMABUF_IOCTL_DEF(ioctl, _func, _flags) \
+#define HYPER_DMABUF_IOCTL_DEF(ioctl, _func, _flags) \
[_IOC_NR(ioctl)] = { \
.cmd = ioctl, \
.func = _func, \
@@ -42,6 +42,9 @@ struct hyper_dmabuf_ioctl_desc {
.name = #ioctl \
}

+long hyper_dmabuf_ioctl(struct file *filp,
+ unsigned int cmd, unsigned long param);
+
int hyper_dmabuf_unexport_ioctl(struct file *filp, void *data);

#endif //__HYPER_DMABUF_IOCTL_H__
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.c
index 907f76e..fbbcc39 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.c
@@ -52,18 +52,19 @@ void hyper_dmabuf_create_req(struct hyper_dmabuf_req *req,
req->stat = HYPER_DMABUF_REQ_NOT_RESPONDED;
req->cmd = cmd;

- switch(cmd) {
+ switch (cmd) {
/* as exporter, commands to importer */
case HYPER_DMABUF_EXPORT:
/* exporting pages for dmabuf */
/* command : HYPER_DMABUF_EXPORT,
- * op0~3 : hyper_dmabuf_id
+ * op0~op3 : hyper_dmabuf_id
* op4 : number of pages to be shared
* op5 : offset of data in the first page
* op6 : length of data in the last page
* op7 : top-level reference number for shared pages
* op8 : size of private data (from op9)
- * op9 ~ : Driver-specific private data (e.g. graphic buffer's meta info)
+ * op9 ~ : Driver-specific private data
+ * (e.g. graphic buffer's meta info)
*/

memcpy(&req->op[0], &op[0], 9 * sizeof(int) + op[8]);
@@ -72,34 +73,39 @@ void hyper_dmabuf_create_req(struct hyper_dmabuf_req *req,
case HYPER_DMABUF_NOTIFY_UNEXPORT:
/* destroy sg_list for hyper_dmabuf_id on remote side */
/* command : DMABUF_DESTROY,
- * op0~3 : hyper_dmabuf_id_t hid
+ * op0~op3 : hyper_dmabuf_id_t hid
*/

- for (i=0; i < 4; i++)
+ for (i = 0; i < 4; i++)
req->op[i] = op[i];
break;

case HYPER_DMABUF_EXPORT_FD:
case HYPER_DMABUF_EXPORT_FD_FAILED:
- /* dmabuf fd is being created on imported side or importing failed */
- /* command : HYPER_DMABUF_EXPORT_FD or HYPER_DMABUF_EXPORT_FD_FAILED,
- * op0~3 : hyper_dmabuf_id
+ /* dmabuf fd is being created on imported side or importing
+ * failed
+ *
+ * command : HYPER_DMABUF_EXPORT_FD or
+ * HYPER_DMABUF_EXPORT_FD_FAILED,
+ * op0~op3 : hyper_dmabuf_id
*/

- for (i=0; i < 4; i++)
+ for (i = 0; i < 4; i++)
req->op[i] = op[i];
break;

case HYPER_DMABUF_OPS_TO_REMOTE:
- /* notifying dmabuf map/unmap to importer (probably not needed) */
- /* for dmabuf synchronization */
+ /* notifying dmabuf map/unmap to importer (probably not needed)
+ * for dmabuf synchronization
+ */
break;

- /* as importer, command to exporter */
case HYPER_DMABUF_OPS_TO_SOURCE:
- /* notifying dmabuf map/unmap to exporter, map will make the driver to do shadow mapping
- * or unmapping for synchronization with original exporter (e.g. i915) */
- /* command : DMABUF_OPS_TO_SOURCE.
+ /* notifying dmabuf map/unmap to exporter, map will make
+ * the driver to do shadow mapping or unmapping for
+ * synchronization with original exporter (e.g. i915)
+ *
+ * command : DMABUF_OPS_TO_SOURCE.
* op0~3 : hyper_dmabuf_id
* op4 : map(=1)/unmap(=2)/attach(=3)/detach(=4)
*/
@@ -116,7 +122,8 @@ void hyper_dmabuf_create_req(struct hyper_dmabuf_req *req,
static void cmd_process_work(struct work_struct *work)
{
struct imported_sgt_info *imported;
- struct cmd_process *proc = container_of(work, struct cmd_process, work);
+ struct cmd_process *proc = container_of(work,
+ struct cmd_process, work);
struct hyper_dmabuf_req *req;
int domid;
int i;
@@ -128,40 +135,42 @@ static void cmd_process_work(struct work_struct *work)
case HYPER_DMABUF_EXPORT:
/* exporting pages for dmabuf */
/* command : HYPER_DMABUF_EXPORT,
- * op0~3 : hyper_dmabuf_id
+ * op0~op3 : hyper_dmabuf_id
* op4 : number of pages to be shared
* op5 : offset of data in the first page
* op6 : length of data in the last page
* op7 : top-level reference number for shared pages
* op8 : size of private data (from op9)
- * op9 ~ : Driver-specific private data (e.g. graphic buffer's meta info)
+ * op9 ~ : Driver-specific private data
+ * (e.g. graphic buffer's meta info)
*/

- /* if nents == 0, it means it is a message only for priv synchronization
- * for existing imported_sgt_info so not creating a new one */
+ /* if nents == 0, it means it is a message only for
+ * priv synchronization. for existing imported_sgt_info
+ * so not creating a new one
+ */
if (req->op[4] == 0) {
hyper_dmabuf_id_t exist = {req->op[0],
{req->op[1], req->op[2],
- req->op[3]}};
+ req->op[3] } };

imported = hyper_dmabuf_find_imported(exist);

if (!imported) {
dev_err(hy_drv_priv->dev,
- "Can't find imported sgt_info from IMPORT_LIST\n");
+ "Can't find imported sgt_info\n");
break;
}

/* if size of new private data is different,
- * we reallocate it. */
+ * we reallocate it.
+ */
if (imported->sz_priv != req->op[8]) {
kfree(imported->priv);
imported->sz_priv = req->op[8];
- imported->priv = kcalloc(1, req->op[8], GFP_KERNEL);
+ imported->priv = kcalloc(1, req->op[8],
+ GFP_KERNEL);
if (!imported->priv) {
- dev_err(hy_drv_priv->dev,
- "Fail to allocate priv\n");
-
/* set it invalid */
imported->valid = 0;
break;
@@ -181,26 +190,20 @@ static void cmd_process_work(struct work_struct *work)

imported = kcalloc(1, sizeof(*imported), GFP_KERNEL);

- if (!imported) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!imported)
break;
- }

imported->sz_priv = req->op[8];
imported->priv = kcalloc(1, req->op[8], GFP_KERNEL);

if (!imported->priv) {
- dev_err(hy_drv_priv->dev,
- "Fail to allocate priv\n");
-
kfree(imported);
break;
}

imported->hid.id = req->op[0];

- for (i=0; i<3; i++)
+ for (i = 0; i < 3; i++)
imported->hid.rng_key[i] = req->op[i+1];

imported->nents = req->op[4];
@@ -230,13 +233,13 @@ static void cmd_process_work(struct work_struct *work)
break;

case HYPER_DMABUF_OPS_TO_REMOTE:
- /* notifying dmabuf map/unmap to importer (probably not needed) */
- /* for dmabuf synchronization */
+ /* notifying dmabuf map/unmap to importer
+ * (probably not needed) for dmabuf synchronization
+ */
break;

default:
/* shouldn't get here */
- /* no matched command, nothing to do.. just return error */
break;
}

@@ -280,20 +283,22 @@ int hyper_dmabuf_msg_parse(int domid, struct hyper_dmabuf_req *req)
* op0~3 : hyper_dmabuf_id
*/
dev_dbg(hy_drv_priv->dev,
- "%s: processing HYPER_DMABUF_NOTIFY_UNEXPORT\n", __func__);
+ "processing HYPER_DMABUF_NOTIFY_UNEXPORT\n");

imported = hyper_dmabuf_find_imported(hid);

if (imported) {
/* if anything is still using dma_buf */
if (imported->importers) {
- /*
- * Buffer is still in use, just mark that it should
- * not be allowed to export its fd anymore.
+ /* Buffer is still in use, just mark that
+ * it should not be allowed to export its fd
+ * anymore.
*/
imported->valid = false;
} else {
- /* No one is using buffer, remove it from imported list */
+ /* No one is using buffer, remove it from
+ * imported list
+ */
hyper_dmabuf_remove_imported(hid);
kfree(imported);
}
@@ -306,10 +311,12 @@ int hyper_dmabuf_msg_parse(int domid, struct hyper_dmabuf_req *req)

/* dma buf remote synchronization */
if (req->cmd == HYPER_DMABUF_OPS_TO_SOURCE) {
- /* notifying dmabuf map/unmap to exporter, map will make the driver to do shadow mapping
- * or unmapping for synchronization with original exporter (e.g. i915) */
-
- /* command : DMABUF_OPS_TO_SOURCE.
+ /* notifying dmabuf map/unmap to exporter, map will
+ * make the driver to do shadow mapping
+ * or unmapping for synchronization with original
+ * exporter (e.g. i915)
+ *
+ * command : DMABUF_OPS_TO_SOURCE.
* op0~3 : hyper_dmabuf_id
* op1 : enum hyper_dmabuf_ops {....}
*/
@@ -330,27 +337,30 @@ int hyper_dmabuf_msg_parse(int domid, struct hyper_dmabuf_req *req)
if (req->cmd == HYPER_DMABUF_EXPORT_FD) {
/* find a corresponding SGT for the id */
dev_dbg(hy_drv_priv->dev,
- "Processing HYPER_DMABUF_EXPORT_FD for buffer {id:%d key:%d %d %d}\n",
+ "HYPER_DMABUF_EXPORT_FD for {id:%d key:%d %d %d}\n",
hid.id, hid.rng_key[0], hid.rng_key[1], hid.rng_key[2]);

exported = hyper_dmabuf_find_exported(hid);

if (!exported) {
dev_err(hy_drv_priv->dev,
- "critical err: requested sgt_info can't be found for buffer {id:%d key:%d %d %d}\n",
- hid.id, hid.rng_key[0], hid.rng_key[1], hid.rng_key[2]);
+ "buffer {id:%d key:%d %d %d} not found\n",
+ hid.id, hid.rng_key[0], hid.rng_key[1],
+ hid.rng_key[2]);

req->stat = HYPER_DMABUF_REQ_ERROR;
} else if (!exported->valid) {
dev_dbg(hy_drv_priv->dev,
- "Buffer no longer valid - cannot export fd for buffer {id:%d key:%d %d %d}\n",
- hid.id, hid.rng_key[0], hid.rng_key[1], hid.rng_key[2]);
+ "Buffer no longer valid {id:%d key:%d %d %d}\n",
+ hid.id, hid.rng_key[0], hid.rng_key[1],
+ hid.rng_key[2]);

req->stat = HYPER_DMABUF_REQ_ERROR;
} else {
dev_dbg(hy_drv_priv->dev,
- "Buffer still valid - can export fd for buffer {id:%d key:%d %d %d}\n",
- hid.id, hid.rng_key[0], hid.rng_key[1], hid.rng_key[2]);
+ "Buffer still valid {id:%d key:%d %d %d}\n",
+ hid.id, hid.rng_key[0], hid.rng_key[1],
+ hid.rng_key[2]);

exported->active++;
req->stat = HYPER_DMABUF_REQ_PROCESSED;
@@ -360,15 +370,16 @@ int hyper_dmabuf_msg_parse(int domid, struct hyper_dmabuf_req *req)

if (req->cmd == HYPER_DMABUF_EXPORT_FD_FAILED) {
dev_dbg(hy_drv_priv->dev,
- "Processing HYPER_DMABUF_EXPORT_FD_FAILED for buffer {id:%d key:%d %d %d}\n",
+ "HYPER_DMABUF_EXPORT_FD_FAILED for {id:%d key:%d %d %d}\n",
hid.id, hid.rng_key[0], hid.rng_key[1], hid.rng_key[2]);

exported = hyper_dmabuf_find_exported(hid);

if (!exported) {
dev_err(hy_drv_priv->dev,
- "critical err: requested sgt_info can't be found for buffer {id:%d key:%d %d %d}\n",
- hid.id, hid.rng_key[0], hid.rng_key[1], hid.rng_key[2]);
+ "buffer {id:%d key:%d %d %d} not found\n",
+ hid.id, hid.rng_key[0], hid.rng_key[1],
+ hid.rng_key[2]);

req->stat = HYPER_DMABUF_REQ_ERROR;
} else {
@@ -382,19 +393,14 @@ int hyper_dmabuf_msg_parse(int domid, struct hyper_dmabuf_req *req)
"%s: putting request to workqueue\n", __func__);
temp_req = kmalloc(sizeof(*temp_req), GFP_KERNEL);

- if (!temp_req) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!temp_req)
return -ENOMEM;
- }

memcpy(temp_req, req, sizeof(*temp_req));

proc = kcalloc(1, sizeof(struct cmd_process), GFP_KERNEL);

if (!proc) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
kfree(temp_req);
return -ENOMEM;
}
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.h b/drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.h
index 7c694ec..9c8a76b 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.h
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_msg.h
@@ -79,7 +79,9 @@ void hyper_dmabuf_create_req(struct hyper_dmabuf_req *req,
enum hyper_dmabuf_command command,
int *operands);

-/* parse incoming request packet (or response) and take appropriate actions for those */
+/* parse incoming request packet (or response) and take
+ * appropriate actions for those
+ */
int hyper_dmabuf_msg_parse(int domid, struct hyper_dmabuf_req *req);

#endif // __HYPER_DMABUF_MSG_H__
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ops.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ops.c
index 7e73170..03fdd30 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ops.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ops.c
@@ -53,18 +53,15 @@ static int hyper_dmabuf_sync_request(hyper_dmabuf_id_t hid, int dmabuf_ops)

op[0] = hid.id;

- for (i=0; i<3; i++)
+ for (i = 0; i < 3; i++)
op[i+1] = hid.rng_key[i];

op[4] = dmabuf_ops;

req = kcalloc(1, sizeof(*req), GFP_KERNEL);

- if (!req) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!req)
return -ENOMEM;
- }

hyper_dmabuf_create_req(req, HYPER_DMABUF_OPS_TO_SOURCE, &op[0]);

@@ -81,8 +78,8 @@ static int hyper_dmabuf_sync_request(hyper_dmabuf_id_t hid, int dmabuf_ops)
return ret;
}

-static int hyper_dmabuf_ops_attach(struct dma_buf* dmabuf,
- struct device* dev,
+static int hyper_dmabuf_ops_attach(struct dma_buf *dmabuf,
+ struct device *dev,
struct dma_buf_attachment *attach)
{
struct imported_sgt_info *imported;
@@ -99,7 +96,7 @@ static int hyper_dmabuf_ops_attach(struct dma_buf* dmabuf,
return ret;
}

-static void hyper_dmabuf_ops_detach(struct dma_buf* dmabuf,
+static void hyper_dmabuf_ops_detach(struct dma_buf *dmabuf,
struct dma_buf_attachment *attach)
{
struct imported_sgt_info *imported;
@@ -114,8 +111,9 @@ static void hyper_dmabuf_ops_detach(struct dma_buf* dmabuf,
HYPER_DMABUF_OPS_DETACH);
}

-static struct sg_table* hyper_dmabuf_ops_map(struct dma_buf_attachment *attachment,
- enum dma_data_direction dir)
+static struct sg_table *hyper_dmabuf_ops_map(
+ struct dma_buf_attachment *attachment,
+ enum dma_data_direction dir)
{
struct sg_table *st;
struct imported_sgt_info *imported;
@@ -130,9 +128,8 @@ static struct sg_table* hyper_dmabuf_ops_map(struct dma_buf_attachment *attachme
/* extract pages from sgt */
pg_info = hyper_dmabuf_ext_pgs(imported->sgt);

- if (!pg_info) {
+ if (!pg_info)
return NULL;
- }

/* create a new sg_table with extracted pages */
st = hyper_dmabuf_create_sgt(pg_info->pgs, pg_info->frst_ofst,
@@ -140,8 +137,8 @@ static struct sg_table* hyper_dmabuf_ops_map(struct dma_buf_attachment *attachme
if (!st)
goto err_free_sg;

- if (!dma_map_sg(attachment->dev, st->sgl, st->nents, dir))
- goto err_free_sg;
+ if (!dma_map_sg(attachment->dev, st->sgl, st->nents, dir))
+ goto err_free_sg;

ret = hyper_dmabuf_sync_request(imported->hid,
HYPER_DMABUF_OPS_MAP);
@@ -196,9 +193,8 @@ static void hyper_dmabuf_ops_release(struct dma_buf *dma_buf)

imported = (struct imported_sgt_info *)dma_buf->priv;

- if (!dmabuf_refcount(imported->dma_buf)) {
+ if (!dmabuf_refcount(imported->dma_buf))
imported->dma_buf = NULL;
- }

imported->importers--;

@@ -219,8 +215,9 @@ static void hyper_dmabuf_ops_release(struct dma_buf *dma_buf)
HYPER_DMABUF_OPS_RELEASE);

/*
- * Check if buffer is still valid and if not remove it from imported list.
- * That has to be done after sending sync request
+ * Check if buffer is still valid and if not remove it
+ * from imported list. That has to be done after sending
+ * sync request
*/
if (finish) {
hyper_dmabuf_remove_imported(imported->hid);
@@ -228,7 +225,8 @@ static void hyper_dmabuf_ops_release(struct dma_buf *dma_buf)
}
}

-static int hyper_dmabuf_ops_begin_cpu_access(struct dma_buf *dmabuf, enum dma_data_direction dir)
+static int hyper_dmabuf_ops_begin_cpu_access(struct dma_buf *dmabuf,
+ enum dma_data_direction dir)
{
struct imported_sgt_info *imported;
int ret;
@@ -244,7 +242,8 @@ static int hyper_dmabuf_ops_begin_cpu_access(struct dma_buf *dmabuf, enum dma_da
return ret;
}

-static int hyper_dmabuf_ops_end_cpu_access(struct dma_buf *dmabuf, enum dma_data_direction dir)
+static int hyper_dmabuf_ops_end_cpu_access(struct dma_buf *dmabuf,
+ enum dma_data_direction dir)
{
struct imported_sgt_info *imported;
int ret;
@@ -260,7 +259,8 @@ static int hyper_dmabuf_ops_end_cpu_access(struct dma_buf *dmabuf, enum dma_data
return 0;
}

-static void *hyper_dmabuf_ops_kmap_atomic(struct dma_buf *dmabuf, unsigned long pgnum)
+static void *hyper_dmabuf_ops_kmap_atomic(struct dma_buf *dmabuf,
+ unsigned long pgnum)
{
struct imported_sgt_info *imported;
int ret;
@@ -273,10 +273,12 @@ static void *hyper_dmabuf_ops_kmap_atomic(struct dma_buf *dmabuf, unsigned long
ret = hyper_dmabuf_sync_request(imported->hid,
HYPER_DMABUF_OPS_KMAP_ATOMIC);

- return NULL; /* for now NULL.. need to return the address of mapped region */
+ /* TODO: NULL for now. Need to return the addr of mapped region */
+ return NULL;
}

-static void hyper_dmabuf_ops_kunmap_atomic(struct dma_buf *dmabuf, unsigned long pgnum, void *vaddr)
+static void hyper_dmabuf_ops_kunmap_atomic(struct dma_buf *dmabuf,
+ unsigned long pgnum, void *vaddr)
{
struct imported_sgt_info *imported;
int ret;
@@ -322,7 +324,8 @@ static void hyper_dmabuf_ops_kunmap(struct dma_buf *dmabuf, unsigned long pgnum,
HYPER_DMABUF_OPS_KUNMAP);
}

-static int hyper_dmabuf_ops_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
+static int hyper_dmabuf_ops_mmap(struct dma_buf *dmabuf,
+ struct vm_area_struct *vma)
{
struct imported_sgt_info *imported;
int ret;
@@ -374,8 +377,8 @@ static const struct dma_buf_ops hyper_dmabuf_ops = {
.map_dma_buf = hyper_dmabuf_ops_map,
.unmap_dma_buf = hyper_dmabuf_ops_unmap,
.release = hyper_dmabuf_ops_release,
- .begin_cpu_access = (void*)hyper_dmabuf_ops_begin_cpu_access,
- .end_cpu_access = (void*)hyper_dmabuf_ops_end_cpu_access,
+ .begin_cpu_access = (void *)hyper_dmabuf_ops_begin_cpu_access,
+ .end_cpu_access = (void *)hyper_dmabuf_ops_end_cpu_access,
.map_atomic = hyper_dmabuf_ops_kmap_atomic,
.unmap_atomic = hyper_dmabuf_ops_kunmap_atomic,
.map = hyper_dmabuf_ops_kmap,
@@ -395,9 +398,8 @@ int hyper_dmabuf_export_fd(struct imported_sgt_info *imported, int flags)
*/
hyper_dmabuf_export_dma_buf(imported);

- if (imported->dma_buf) {
+ if (imported->dma_buf)
fd = dma_buf_fd(imported->dma_buf, flags);
- }

return fd;
}
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_query.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_query.c
index 36e888c..1f2f56b 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_query.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_query.c
@@ -36,63 +36,63 @@
((nents)*PAGE_SIZE - (first_offset) - PAGE_SIZE + (last_len))

int hyper_dmabuf_query_exported(struct exported_sgt_info *exported,
- int query, unsigned long* info)
+ int query, unsigned long *info)
{
- switch (query)
- {
- case HYPER_DMABUF_QUERY_TYPE:
- *info = EXPORTED;
- break;
-
- /* exporting domain of this specific dmabuf*/
- case HYPER_DMABUF_QUERY_EXPORTER:
- *info = HYPER_DMABUF_DOM_ID(exported->hid);
- break;
-
- /* importing domain of this specific dmabuf */
- case HYPER_DMABUF_QUERY_IMPORTER:
- *info = exported->rdomid;
- break;
-
- /* size of dmabuf in byte */
- case HYPER_DMABUF_QUERY_SIZE:
- *info = exported->dma_buf->size;
- break;
-
- /* whether the buffer is used by importer */
- case HYPER_DMABUF_QUERY_BUSY:
- *info = (exported->active > 0);
- break;
-
- /* whether the buffer is unexported */
- case HYPER_DMABUF_QUERY_UNEXPORTED:
- *info = !exported->valid;
- break;
-
- /* whether the buffer is scheduled to be unexported */
- case HYPER_DMABUF_QUERY_DELAYED_UNEXPORTED:
- *info = !exported->unexport_sched;
- break;
-
- /* size of private info attached to buffer */
- case HYPER_DMABUF_QUERY_PRIV_INFO_SIZE:
- *info = exported->sz_priv;
- break;
-
- /* copy private info attached to buffer */
- case HYPER_DMABUF_QUERY_PRIV_INFO:
- if (exported->sz_priv > 0) {
- int n;
- n = copy_to_user((void __user*) *info,
- exported->priv,
- exported->sz_priv);
- if (n != 0)
- return -EINVAL;
- }
- break;
-
- default:
- return -EINVAL;
+ switch (query) {
+ case HYPER_DMABUF_QUERY_TYPE:
+ *info = EXPORTED;
+ break;
+
+ /* exporting domain of this specific dmabuf*/
+ case HYPER_DMABUF_QUERY_EXPORTER:
+ *info = HYPER_DMABUF_DOM_ID(exported->hid);
+ break;
+
+ /* importing domain of this specific dmabuf */
+ case HYPER_DMABUF_QUERY_IMPORTER:
+ *info = exported->rdomid;
+ break;
+
+ /* size of dmabuf in byte */
+ case HYPER_DMABUF_QUERY_SIZE:
+ *info = exported->dma_buf->size;
+ break;
+
+ /* whether the buffer is used by importer */
+ case HYPER_DMABUF_QUERY_BUSY:
+ *info = (exported->active > 0);
+ break;
+
+ /* whether the buffer is unexported */
+ case HYPER_DMABUF_QUERY_UNEXPORTED:
+ *info = !exported->valid;
+ break;
+
+ /* whether the buffer is scheduled to be unexported */
+ case HYPER_DMABUF_QUERY_DELAYED_UNEXPORTED:
+ *info = !exported->unexport_sched;
+ break;
+
+ /* size of private info attached to buffer */
+ case HYPER_DMABUF_QUERY_PRIV_INFO_SIZE:
+ *info = exported->sz_priv;
+ break;
+
+ /* copy private info attached to buffer */
+ case HYPER_DMABUF_QUERY_PRIV_INFO:
+ if (exported->sz_priv > 0) {
+ int n;
+
+ n = copy_to_user((void __user *) *info,
+ exported->priv,
+ exported->sz_priv);
+ if (n != 0)
+ return -EINVAL;
+ }
+ break;
+
+ default:
+ return -EINVAL;
}

return 0;
@@ -102,66 +102,70 @@ int hyper_dmabuf_query_exported(struct exported_sgt_info *exported,
int hyper_dmabuf_query_imported(struct imported_sgt_info *imported,
int query, unsigned long *info)
{
- switch (query)
- {
- case HYPER_DMABUF_QUERY_TYPE:
- *info = IMPORTED;
- break;
-
- /* exporting domain of this specific dmabuf*/
- case HYPER_DMABUF_QUERY_EXPORTER:
- *info = HYPER_DMABUF_DOM_ID(imported->hid);
- break;
-
- /* importing domain of this specific dmabuf */
- case HYPER_DMABUF_QUERY_IMPORTER:
- *info = hy_drv_priv->domid;
- break;
-
- /* size of dmabuf in byte */
- case HYPER_DMABUF_QUERY_SIZE:
- if (imported->dma_buf) {
- /* if local dma_buf is created (if it's ever mapped),
- * retrieve it directly from struct dma_buf *
- */
- *info = imported->dma_buf->size;
- } else {
- /* calcuate it from given nents, frst_ofst and last_len */
- *info = HYPER_DMABUF_SIZE(imported->nents,
- imported->frst_ofst,
- imported->last_len);
- }
- break;
-
- /* whether the buffer is used or not */
- case HYPER_DMABUF_QUERY_BUSY:
- /* checks if it's used by importer */
- *info = (imported->importers > 0);
- break;
-
- /* whether the buffer is unexported */
- case HYPER_DMABUF_QUERY_UNEXPORTED:
- *info = !imported->valid;
- break;
- /* size of private info attached to buffer */
- case HYPER_DMABUF_QUERY_PRIV_INFO_SIZE:
- *info = imported->sz_priv;
- break;
-
- /* copy private info attached to buffer */
- case HYPER_DMABUF_QUERY_PRIV_INFO:
- if (imported->sz_priv > 0) {
- int n;
- n = copy_to_user((void __user*) *info,
- imported->priv,
- imported->sz_priv);
- if (n != 0)
- return -EINVAL;
- }
- break;
-
- default:
- return -EINVAL;
+ switch (query) {
+ case HYPER_DMABUF_QUERY_TYPE:
+ *info = IMPORTED;
+ break;
+
+ /* exporting domain of this specific dmabuf*/
+ case HYPER_DMABUF_QUERY_EXPORTER:
+ *info = HYPER_DMABUF_DOM_ID(imported->hid);
+ break;
+
+ /* importing domain of this specific dmabuf */
+ case HYPER_DMABUF_QUERY_IMPORTER:
+ *info = hy_drv_priv->domid;
+ break;
+
+ /* size of dmabuf in byte */
+ case HYPER_DMABUF_QUERY_SIZE:
+ if (imported->dma_buf) {
+ /* if local dma_buf is created (if it's
+ * ever mapped), retrieve it directly
+ * from struct dma_buf *
+ */
+ *info = imported->dma_buf->size;
+ } else {
+ /* calcuate it from given nents, frst_ofst
+ * and last_len
+ */
+ *info = HYPER_DMABUF_SIZE(imported->nents,
+ imported->frst_ofst,
+ imported->last_len);
+ }
+ break;
+
+ /* whether the buffer is used or not */
+ case HYPER_DMABUF_QUERY_BUSY:
+ /* checks if it's used by importer */
+ *info = (imported->importers > 0);
+ break;
+
+ /* whether the buffer is unexported */
+ case HYPER_DMABUF_QUERY_UNEXPORTED:
+ *info = !imported->valid;
+ break;
+
+ /* size of private info attached to buffer */
+ case HYPER_DMABUF_QUERY_PRIV_INFO_SIZE:
+ *info = imported->sz_priv;
+ break;
+
+ /* copy private info attached to buffer */
+ case HYPER_DMABUF_QUERY_PRIV_INFO:
+ if (imported->sz_priv > 0) {
+ int n;
+
+ n = copy_to_user((void __user *)*info,
+ imported->priv,
+ imported->sz_priv);
+ if (n != 0)
+ return -EINVAL;
+ }
+ break;
+
+ default:
+ return -EINVAL;
}

return 0;
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_remote_sync.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_remote_sync.c
index 01ec98c..c9fe040 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_remote_sync.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_remote_sync.c
@@ -76,11 +76,8 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)
case HYPER_DMABUF_OPS_ATTACH:
attachl = kcalloc(1, sizeof(*attachl), GFP_KERNEL);

- if (!attachl) {
- dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_ATTACH\n");
+ if (!attachl)
return -ENOMEM;
- }

attachl->attach = dma_buf_attach(exported->dma_buf,
hy_drv_priv->dev);
@@ -126,13 +123,11 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)

sgtl = kcalloc(1, sizeof(*sgtl), GFP_KERNEL);

- if (!sgtl) {
- dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_MAP\n");
+ if (!sgtl)
return -ENOMEM;
- }

- sgtl->sgt = dma_buf_map_attachment(attachl->attach, DMA_BIDIRECTIONAL);
+ sgtl->sgt = dma_buf_map_attachment(attachl->attach,
+ DMA_BIDIRECTIONAL);
if (!sgtl->sgt) {
kfree(sgtl);
dev_err(hy_drv_priv->dev,
@@ -148,7 +143,7 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)
dev_err(hy_drv_priv->dev,
"remote sync::HYPER_DMABUF_OPS_UNMAP\n");
dev_err(hy_drv_priv->dev,
- "no more SGT or attachment left to be unmapped\n");
+ "no SGT or attach left to be unmapped\n");
return -EFAULT;
}

@@ -165,23 +160,28 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)

case HYPER_DMABUF_OPS_RELEASE:
dev_dbg(hy_drv_priv->dev,
- "Buffer {id:%d key:%d %d %d} released, references left: %d\n",
- exported->hid.id, exported->hid.rng_key[0], exported->hid.rng_key[1],
- exported->hid.rng_key[2], exported->active - 1);
+ "id:%d key:%d %d %d} released, ref left: %d\n",
+ exported->hid.id, exported->hid.rng_key[0],
+ exported->hid.rng_key[1], exported->hid.rng_key[2],
+ exported->active - 1);
+
+ exported->active--;

- exported->active--;
- /* If there are still importers just break, if no then continue with final cleanup */
+ /* If there are still importers just break, if no then
+ * continue with final cleanup
+ */
if (exported->active)
break;

- /*
- * Importer just released buffer fd, check if there is any other importer still using it.
- * If not and buffer was unexported, clean up shared data and remove that buffer.
+ /* Importer just released buffer fd, check if there is
+ * any other importer still using it.
+ * If not and buffer was unexported, clean up shared
+ * data and remove that buffer.
*/
dev_dbg(hy_drv_priv->dev,
"Buffer {id:%d key:%d %d %d} final released\n",
- exported->hid.id, exported->hid.rng_key[0], exported->hid.rng_key[1],
- exported->hid.rng_key[2]);
+ exported->hid.id, exported->hid.rng_key[0],
+ exported->hid.rng_key[1], exported->hid.rng_key[2]);

if (!exported->valid && !exported->active &&
!exported->unexport_sched) {
@@ -195,19 +195,21 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)
break;

case HYPER_DMABUF_OPS_BEGIN_CPU_ACCESS:
- ret = dma_buf_begin_cpu_access(exported->dma_buf, DMA_BIDIRECTIONAL);
+ ret = dma_buf_begin_cpu_access(exported->dma_buf,
+ DMA_BIDIRECTIONAL);
if (ret) {
dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_BEGIN_CPU_ACCESS\n");
+ "HYPER_DMABUF_OPS_BEGIN_CPU_ACCESS\n");
return ret;
}
break;

case HYPER_DMABUF_OPS_END_CPU_ACCESS:
- ret = dma_buf_end_cpu_access(exported->dma_buf, DMA_BIDIRECTIONAL);
+ ret = dma_buf_end_cpu_access(exported->dma_buf,
+ DMA_BIDIRECTIONAL);
if (ret) {
dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_END_CPU_ACCESS\n");
+ "HYPER_DMABUF_OPS_END_CPU_ACCESS\n");
return ret;
}
break;
@@ -215,22 +217,21 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)
case HYPER_DMABUF_OPS_KMAP_ATOMIC:
case HYPER_DMABUF_OPS_KMAP:
va_kmapl = kcalloc(1, sizeof(*va_kmapl), GFP_KERNEL);
- if (!va_kmapl) {
- dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_KMAP(_ATOMIC)\n");
+ if (!va_kmapl)
return -ENOMEM;
- }

/* dummy kmapping of 1 page */
if (ops == HYPER_DMABUF_OPS_KMAP_ATOMIC)
- va_kmapl->vaddr = dma_buf_kmap_atomic(exported->dma_buf, 1);
+ va_kmapl->vaddr = dma_buf_kmap_atomic(
+ exported->dma_buf, 1);
else
- va_kmapl->vaddr = dma_buf_kmap(exported->dma_buf, 1);
+ va_kmapl->vaddr = dma_buf_kmap(
+ exported->dma_buf, 1);

if (!va_kmapl->vaddr) {
kfree(va_kmapl);
dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_KMAP(_ATOMIC)\n");
+ "HYPER_DMABUF_OPS_KMAP(_ATOMIC)\n");
return -ENOMEM;
}
list_add(&va_kmapl->list, &exported->va_kmapped->list);
@@ -240,7 +241,7 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)
case HYPER_DMABUF_OPS_KUNMAP:
if (list_empty(&exported->va_kmapped->list)) {
dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_KUNMAP(_ATOMIC)\n");
+ "HYPER_DMABUF_OPS_KUNMAP(_ATOMIC)\n");
dev_err(hy_drv_priv->dev,
"no more dmabuf VA to be freed\n");
return -EFAULT;
@@ -250,15 +251,17 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)
struct kmap_vaddr_list, list);
if (!va_kmapl->vaddr) {
dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_KUNMAP(_ATOMIC)\n");
+ "HYPER_DMABUF_OPS_KUNMAP(_ATOMIC)\n");
return PTR_ERR(va_kmapl->vaddr);
}

/* unmapping 1 page */
if (ops == HYPER_DMABUF_OPS_KUNMAP_ATOMIC)
- dma_buf_kunmap_atomic(exported->dma_buf, 1, va_kmapl->vaddr);
+ dma_buf_kunmap_atomic(exported->dma_buf,
+ 1, va_kmapl->vaddr);
else
- dma_buf_kunmap(exported->dma_buf, 1, va_kmapl->vaddr);
+ dma_buf_kunmap(exported->dma_buf,
+ 1, va_kmapl->vaddr);

list_del(&va_kmapl->list);
kfree(va_kmapl);
@@ -266,7 +269,8 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)

case HYPER_DMABUF_OPS_MMAP:
/* currently not supported: looking for a way to create
- * a dummy vma */
+ * a dummy vma
+ */
dev_warn(hy_drv_priv->dev,
"remote sync::sychronized mmap is not supported\n");
break;
@@ -274,11 +278,8 @@ int hyper_dmabuf_remote_sync(hyper_dmabuf_id_t hid, int ops)
case HYPER_DMABUF_OPS_VMAP:
va_vmapl = kcalloc(1, sizeof(*va_vmapl), GFP_KERNEL);

- if (!va_vmapl) {
- dev_err(hy_drv_priv->dev,
- "remote sync::HYPER_DMABUF_OPS_VMAP\n");
+ if (!va_vmapl)
return -ENOMEM;
- }

/* dummy vmapping */
va_vmapl->vaddr = dma_buf_vmap(exported->dma_buf);
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.c
index 315c354..e9299e5 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.c
@@ -89,9 +89,8 @@ struct pages_info *hyper_dmabuf_ext_pgs(struct sg_table *sgt)
if (!pg_info)
return NULL;

- pg_info->pgs = kmalloc(sizeof(struct page *) *
- hyper_dmabuf_get_num_pgs(sgt),
- GFP_KERNEL);
+ pg_info->pgs = kmalloc_array(hyper_dmabuf_get_num_pgs(sgt),
+ sizeof(struct page *), GFP_KERNEL);

if (!pg_info->pgs) {
kfree(pg_info);
@@ -137,17 +136,17 @@ struct pages_info *hyper_dmabuf_ext_pgs(struct sg_table *sgt)
}

/* create sg_table with given pages and other parameters */
-struct sg_table* hyper_dmabuf_create_sgt(struct page **pgs,
- int frst_ofst, int last_len, int nents)
+struct sg_table *hyper_dmabuf_create_sgt(struct page **pgs,
+ int frst_ofst, int last_len,
+ int nents)
{
struct sg_table *sgt;
struct scatterlist *sgl;
int i, ret;

sgt = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
- if (!sgt) {
+ if (!sgt)
return NULL;
- }

ret = sg_alloc_table(sgt, nents, GFP_KERNEL);
if (ret) {
@@ -163,7 +162,7 @@ struct sg_table* hyper_dmabuf_create_sgt(struct page **pgs,

sg_set_page(sgl, pgs[0], PAGE_SIZE-frst_ofst, frst_ofst);

- for (i=1; i<nents-1; i++) {
+ for (i = 1; i < nents-1; i++) {
sgl = sg_next(sgl);
sg_set_page(sgl, pgs[i], PAGE_SIZE, 0);
}
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.h b/drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.h
index 930bade..152f78c 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.h
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_sgl_proc.h
@@ -31,7 +31,7 @@ int dmabuf_refcount(struct dma_buf *dma_buf);
struct pages_info *hyper_dmabuf_ext_pgs(struct sg_table *sgt);

/* create sg_table with given pages and other parameters */
-struct sg_table* hyper_dmabuf_create_sgt(struct page **pgs,
+struct sg_table *hyper_dmabuf_create_sgt(struct page **pgs,
int frst_ofst, int last_len,
int nents);

diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_struct.h b/drivers/xen/hyper_dmabuf/hyper_dmabuf_struct.h
index 8a612d1..a11f804 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_struct.h
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_struct.h
@@ -51,67 +51,91 @@ struct vmap_vaddr_list {

/* Exporter builds pages_info before sharing pages */
struct pages_info {
- int frst_ofst; /* offset of data in the first page */
- int last_len; /* length of data in the last page */
- int nents; /* # of pages */
- struct page **pgs; /* pages that contains reference numbers of shared pages*/
+ int frst_ofst;
+ int last_len;
+ int nents;
+ struct page **pgs;
};


/* Exporter stores references to sgt in a hash table
- * Exporter keeps these references for synchronization and tracking purposes
+ * Exporter keeps these references for synchronization
+ * and tracking purposes
*/
struct exported_sgt_info {
- hyper_dmabuf_id_t hid; /* unique id to reference dmabuf in remote domain */
- int rdomid; /* domain importing this sgt */
+ hyper_dmabuf_id_t hid;
+
+ /* VM ID of importer */
+ int rdomid;

- struct dma_buf *dma_buf; /* needed to store this for freeing it later */
+ struct dma_buf *dma_buf;
int nents;

- /* list of remote activities on dma_buf */
+ /* list for tracking activities on dma_buf */
struct sgt_list *active_sgts;
struct attachment_list *active_attached;
struct kmap_vaddr_list *va_kmapped;
struct vmap_vaddr_list *va_vmapped;

- bool valid; /* set to 0 once unexported. Needed to prevent further mapping by importer */
- int active; /* locally shared on importer's side */
- void *refs_info; /* hypervisor-specific info for the references */
+ /* set to 0 when unexported. Importer doesn't
+ * do a new mapping of buffer if valid == false
+ */
+ bool valid;
+
+ /* active == true if the buffer is actively used
+ * (mapped) by importer
+ */
+ int active;
+
+ /* hypervisor specific reference data for shared pages */
+ void *refs_info;
+
struct delayed_work unexport;
bool unexport_sched;

- /* owner of buffer
- * TODO: that is naiive as buffer may be reused by
- * another userspace app, so here list of struct file should be kept
- * and emergency unexport should be executed only after last of buffer
- * uses releases hyper_dmabuf device
+ /* list for file pointers associated with all user space
+ * application that have exported this same buffer to
+ * another VM. This needs to be tracked to know whether
+ * the buffer can be completely freed.
*/
struct file *filp;

+ /* size of private */
size_t sz_priv;
- char *priv; /* device specific info (e.g. image's meta info?) */
+
+ /* private data associated with the exported buffer */
+ char *priv;
};

-/* Importer store references (before mapping) on shared pages
- * Importer store these references in the table and map it in
- * its own memory map once userspace asks for reference for the buffer */
+/* imported_sgt_info contains information about imported DMA_BUF
+ * this info is kept in IMPORT list and asynchorously retrieved and
+ * used to map DMA_BUF on importer VM's side upon export fd ioctl
+ * request from user-space
+ */
+
struct imported_sgt_info {
hyper_dmabuf_id_t hid; /* unique id for shared dmabuf imported */

- int ref_handle; /* reference number of top level addressing page of shared pages */
- int frst_ofst; /* start offset in first shared page */
- int last_len; /* length of data in the last shared page */
- int nents; /* number of pages to be shared */
+ /* hypervisor-specific handle to pages */
+ int ref_handle;
+
+ /* offset and size info of DMA_BUF */
+ int frst_ofst;
+ int last_len;
+ int nents;

struct dma_buf *dma_buf;
- struct sg_table *sgt; /* sgt pointer after importing buffer */
+ struct sg_table *sgt;

void *refs_info;
bool valid;
int importers;

+ /* size of private */
size_t sz_priv;
- char *priv; /* device specific info (e.g. image's meta info?) */
+
+ /* private data associated with the exported buffer */
+ char *priv;
};

#endif /* __HYPER_DMABUF_STRUCT_H__ */
diff --git a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.c b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.c
index f70b4ea..05f3521 100644
--- a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.c
+++ b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.c
@@ -41,12 +41,10 @@
#include "hyper_dmabuf_xen_comm_list.h"
#include "../hyper_dmabuf_drv.h"

-static int export_req_id = 0;
+static int export_req_id;

struct hyper_dmabuf_req req_pending = {0};

-extern int xenstored_ready;
-
static void xen_get_domid_delayed(struct work_struct *unused);
static void xen_init_comm_env_delayed(struct work_struct *unused);

@@ -160,15 +158,16 @@ void xen_get_domid_delayed(struct work_struct *unused)
int domid, ret;

/* scheduling another if driver is still running
- * and xenstore has not been initialized */
+ * and xenstore has not been initialized
+ */
if (likely(xenstored_ready == 0)) {
dev_dbg(hy_drv_priv->dev,
- "Xenstore is not quite ready yet. Will retry it in 500ms\n");
+ "Xenstore is not ready yet. Will retry in 500ms\n");
schedule_delayed_work(&get_vm_id_work, msecs_to_jiffies(500));
} else {
- xenbus_transaction_start(&xbt);
+ xenbus_transaction_start(&xbt);

- ret = xenbus_scanf(xbt, "domid","", "%d", &domid);
+ ret = xenbus_scanf(xbt, "domid", "", "%d", &domid);

if (ret <= 0)
domid = -1;
@@ -176,14 +175,17 @@ void xen_get_domid_delayed(struct work_struct *unused)
xenbus_transaction_end(xbt, 0);

/* try again since -1 is an invalid id for domain
- * (but only if driver is still running) */
+ * (but only if driver is still running)
+ */
if (unlikely(domid == -1)) {
dev_dbg(hy_drv_priv->dev,
"domid==-1 is invalid. Will retry it in 500ms\n");
- schedule_delayed_work(&get_vm_id_work, msecs_to_jiffies(500));
+ schedule_delayed_work(&get_vm_id_work,
+ msecs_to_jiffies(500));
} else {
dev_info(hy_drv_priv->dev,
- "Successfully retrieved domid from Xenstore:%d\n", domid);
+ "Successfully retrieved domid from Xenstore:%d\n",
+ domid);
hy_drv_priv->domid = domid;
}
}
@@ -199,21 +201,20 @@ int hyper_dmabuf_xen_get_domid(void)
return -1;
}

- xenbus_transaction_start(&xbt);
+ xenbus_transaction_start(&xbt);

- if (!xenbus_scanf(xbt, "domid","", "%d", &domid)) {
+ if (!xenbus_scanf(xbt, "domid", "", "%d", &domid))
domid = -1;
- }

- xenbus_transaction_end(xbt, 0);
+ xenbus_transaction_end(xbt, 0);

return domid;
}

static int xen_comm_next_req_id(void)
{
- export_req_id++;
- return export_req_id;
+ export_req_id++;
+ return export_req_id;
}

/* For now cache latast rings as global variables TODO: keep them in list*/
@@ -236,19 +237,18 @@ static irqreturn_t back_ring_isr(int irq, void *info);
static void remote_dom_exporter_watch_cb(struct xenbus_watch *watch,
const char *path, const char *token)
{
- int rdom,ret;
+ int rdom, ret;
uint32_t grefid, port;
struct xen_comm_rx_ring_info *ring_info;

/* Check which domain has changed its exporter rings */
ret = sscanf(watch->node, "/local/domain/%d/", &rdom);
- if (ret <= 0) {
+ if (ret <= 0)
return;
- }

/* Check if we have importer ring for given remote domain already
- * created */
-
+ * created
+ */
ring_info = xen_comm_find_rx_ring(rdom);

/* Try to query remote domain exporter ring details - if
@@ -298,11 +298,8 @@ int hyper_dmabuf_xen_init_tx_rbuf(int domid)

ring_info = kmalloc(sizeof(*ring_info), GFP_KERNEL);

- if (!ring_info) {
- dev_err(hy_drv_priv->dev,
- "No more spae left\n");
+ if (!ring_info)
return -ENOMEM;
- }

/* from exporter to importer */
shared_ring = (void *)__get_free_pages(GFP_KERNEL, 1);
@@ -318,8 +315,8 @@ int hyper_dmabuf_xen_init_tx_rbuf(int domid)
FRONT_RING_INIT(&(ring_info->ring_front), sring, PAGE_SIZE);

ring_info->gref_ring = gnttab_grant_foreign_access(domid,
- virt_to_mfn(shared_ring),
- 0);
+ virt_to_mfn(shared_ring),
+ 0);
if (ring_info->gref_ring < 0) {
/* fail to get gref */
kfree(ring_info);
@@ -340,7 +337,7 @@ int hyper_dmabuf_xen_init_tx_rbuf(int domid)
/* setting up interrupt */
ret = bind_evtchn_to_irqhandler(alloc_unbound.port,
front_ring_isr, 0,
- NULL, (void*) ring_info);
+ NULL, (void *) ring_info);

if (ret < 0) {
dev_err(hy_drv_priv->dev,
@@ -368,25 +365,24 @@ int hyper_dmabuf_xen_init_tx_rbuf(int domid)

ret = xen_comm_add_tx_ring(ring_info);

- ret = xen_comm_expose_ring_details(hyper_dmabuf_xen_get_domid(), domid,
- ring_info->gref_ring, ring_info->port);
+ ret = xen_comm_expose_ring_details(hyper_dmabuf_xen_get_domid(),
+ domid,
+ ring_info->gref_ring,
+ ring_info->port);

- /*
- * Register watch for remote domain exporter ring.
+ /* Register watch for remote domain exporter ring.
* When remote domain will setup its exporter ring,
* we will automatically connect our importer ring to it.
*/
ring_info->watch.callback = remote_dom_exporter_watch_cb;
- ring_info->watch.node = (const char*) kmalloc(sizeof(char) * 255, GFP_KERNEL);
+ ring_info->watch.node = kmalloc(255, GFP_KERNEL);

if (!ring_info->watch.node) {
- dev_err(hy_drv_priv->dev,
- "No more space left\n");
kfree(ring_info);
return -ENOMEM;
}

- sprintf((char*)ring_info->watch.node,
+ sprintf((char *)ring_info->watch.node,
"/local/domain/%d/data/hyper_dmabuf/%d/port",
domid, hyper_dmabuf_xen_get_domid());

@@ -404,9 +400,8 @@ void hyper_dmabuf_xen_cleanup_tx_rbuf(int domid)
/* check if we at all have exporter ring for given rdomain */
ring_info = xen_comm_find_tx_ring(domid);

- if (!ring_info) {
+ if (!ring_info)
return;
- }

xen_comm_remove_tx_ring(domid);

@@ -416,7 +411,7 @@ void hyper_dmabuf_xen_cleanup_tx_rbuf(int domid)
/* No need to close communication channel, will be done by
* this function
*/
- unbind_from_irqhandler(ring_info->irq, (void*) ring_info);
+ unbind_from_irqhandler(ring_info->irq, (void *) ring_info);

/* No need to free sring page, will be freed by this function
* when other side will end its access
@@ -430,7 +425,8 @@ void hyper_dmabuf_xen_cleanup_tx_rbuf(int domid)
if (!rx_ring_info)
return;

- BACK_RING_INIT(&(rx_ring_info->ring_back), rx_ring_info->ring_back.sring,
+ BACK_RING_INIT(&(rx_ring_info->ring_back),
+ rx_ring_info->ring_back.sring,
PAGE_SIZE);
}

@@ -473,11 +469,8 @@ int hyper_dmabuf_xen_init_rx_rbuf(int domid)

ring_info = kmalloc(sizeof(*ring_info), GFP_KERNEL);

- if (!ring_info) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!ring_info)
return -ENOMEM;
- }

ring_info->sdomain = domid;
ring_info->evtchn = rx_port;
@@ -485,8 +478,6 @@ int hyper_dmabuf_xen_init_rx_rbuf(int domid)
map_ops = kmalloc(sizeof(*map_ops), GFP_KERNEL);

if (!map_ops) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
ret = -ENOMEM;
goto fail_no_map_ops;
}
@@ -497,11 +488,13 @@ int hyper_dmabuf_xen_init_rx_rbuf(int domid)
}

gnttab_set_map_op(&map_ops[0],
- (unsigned long)pfn_to_kaddr(page_to_pfn(shared_ring)),
+ (unsigned long)pfn_to_kaddr(
+ page_to_pfn(shared_ring)),
GNTMAP_host_map, rx_gref, domid);

gnttab_set_unmap_op(&ring_info->unmap_op,
- (unsigned long)pfn_to_kaddr(page_to_pfn(shared_ring)),
+ (unsigned long)pfn_to_kaddr(
+ page_to_pfn(shared_ring)),
GNTMAP_host_map, -1);

ret = gnttab_map_refs(map_ops, NULL, &shared_ring, 1);
@@ -542,13 +535,12 @@ int hyper_dmabuf_xen_init_rx_rbuf(int domid)
ret = xen_comm_add_rx_ring(ring_info);

/* Setup communcation channel in opposite direction */
- if (!xen_comm_find_tx_ring(domid)) {
+ if (!xen_comm_find_tx_ring(domid))
ret = hyper_dmabuf_xen_init_tx_rbuf(domid);
- }

ret = request_irq(ring_info->irq,
back_ring_isr, 0,
- NULL, (void*)ring_info);
+ NULL, (void *)ring_info);

return ret;

@@ -577,7 +569,7 @@ void hyper_dmabuf_xen_cleanup_rx_rbuf(int domid)
xen_comm_remove_rx_ring(domid);

/* no need to close event channel, will be done by that function */
- unbind_from_irqhandler(ring_info->irq, (void*)ring_info);
+ unbind_from_irqhandler(ring_info->irq, (void *)ring_info);

/* unmapping shared ring page */
shared_ring = virt_to_page(ring_info->ring_back.sring);
@@ -636,7 +628,8 @@ static void xen_rx_ch_add_delayed(struct work_struct *unused)

if (!ret)
dev_info(hy_drv_priv->dev,
- "Finishing up setting up rx channel for domain %d\n", i);
+ "Done rx ch init for VM %d\n",
+ i);
}
}

@@ -654,7 +647,8 @@ void xen_init_comm_env_delayed(struct work_struct *unused)

/* scheduling another work if driver is still running
* and xenstore hasn't been initialized or dom_id hasn't
- * been correctly retrieved. */
+ * been correctly retrieved.
+ */
if (likely(xenstored_ready == 0 ||
hy_drv_priv->domid == -1)) {
dev_dbg(hy_drv_priv->dev,
@@ -778,9 +772,8 @@ int hyper_dmabuf_xen_send_req(int domid, struct hyper_dmabuf_req *req,
ring->req_prod_pvt++;

RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(ring, notify);
- if (notify) {
+ if (notify)
notify_remote_via_irq(ring_info->irq);
- }

if (wait) {
while (timeout--) {
@@ -792,24 +785,29 @@ int hyper_dmabuf_xen_send_req(int domid, struct hyper_dmabuf_req *req,

if (timeout < 0) {
mutex_unlock(&ring_info->lock);
- dev_err(hy_drv_priv->dev, "request timed-out\n");
+ dev_err(hy_drv_priv->dev,
+ "request timed-out\n");
return -EBUSY;
}

mutex_unlock(&ring_info->lock);
do_gettimeofday(&tv_end);

- /* checking time duration for round-trip of a request for debugging */
+ /* checking time duration for round-trip of a request
+ * for debugging
+ */
if (tv_end.tv_usec >= tv_start.tv_usec) {
tv_diff.tv_sec = tv_end.tv_sec-tv_start.tv_sec;
tv_diff.tv_usec = tv_end.tv_usec-tv_start.tv_usec;
} else {
tv_diff.tv_sec = tv_end.tv_sec-tv_start.tv_sec-1;
- tv_diff.tv_usec = tv_end.tv_usec+1000000-tv_start.tv_usec;
+ tv_diff.tv_usec = tv_end.tv_usec+1000000-
+ tv_start.tv_usec;
}

if (tv_diff.tv_sec != 0 && tv_diff.tv_usec > 16000)
- dev_dbg(hy_drv_priv->dev, "send_req:time diff: %ld sec, %ld usec\n",
+ dev_dbg(hy_drv_priv->dev,
+ "send_req:time diff: %ld sec, %ld usec\n",
tv_diff.tv_sec, tv_diff.tv_usec);
}

@@ -850,23 +848,24 @@ static irqreturn_t back_ring_isr(int irq, void *info)
ret = hyper_dmabuf_msg_parse(ring_info->sdomain, &req);

if (ret > 0) {
- /* preparing a response for the request and send it to
- * the requester
+ /* preparing a response for the request and
+ * send it to the requester
*/
memcpy(&resp, &req, sizeof(resp));
- memcpy(RING_GET_RESPONSE(ring, ring->rsp_prod_pvt),
+ memcpy(RING_GET_RESPONSE(ring,
+ ring->rsp_prod_pvt),
&resp, sizeof(resp));
ring->rsp_prod_pvt++;

dev_dbg(hy_drv_priv->dev,
- "sending response to exporter for request id:%d\n",
+ "responding to exporter for req:%d\n",
resp.resp_id);

- RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(ring, notify);
+ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(ring,
+ notify);

- if (notify) {
+ if (notify)
notify_remote_via_irq(ring_info->irq);
- }
}

RING_FINAL_CHECK_FOR_REQUESTS(ring, more_to_do);
@@ -905,41 +904,40 @@ static irqreturn_t front_ring_isr(int irq, void *info)
dev_dbg(hy_drv_priv->dev,
"getting response from importer\n");

- if (req_pending.req_id == resp->resp_id) {
+ if (req_pending.req_id == resp->resp_id)
req_pending.stat = resp->stat;
- }

if (resp->stat == HYPER_DMABUF_REQ_NEEDS_FOLLOW_UP) {
/* parsing response */
ret = hyper_dmabuf_msg_parse(ring_info->rdomain,
- (struct hyper_dmabuf_req *)resp);
+ (struct hyper_dmabuf_req *)resp);

if (ret < 0) {
dev_err(hy_drv_priv->dev,
- "getting error while parsing response\n");
+ "err while parsing resp\n");
}
} else if (resp->stat == HYPER_DMABUF_REQ_PROCESSED) {
- /* for debugging dma_buf remote synchronization */
+ /* for debugging dma_buf remote synch */
dev_dbg(hy_drv_priv->dev,
"original request = 0x%x\n", resp->cmd);
dev_dbg(hy_drv_priv->dev,
- "Just got HYPER_DMABUF_REQ_PROCESSED\n");
+ "got HYPER_DMABUF_REQ_PROCESSED\n");
} else if (resp->stat == HYPER_DMABUF_REQ_ERROR) {
- /* for debugging dma_buf remote synchronization */
+ /* for debugging dma_buf remote synch */
dev_dbg(hy_drv_priv->dev,
"original request = 0x%x\n", resp->cmd);
dev_dbg(hy_drv_priv->dev,
- "Just got HYPER_DMABUF_REQ_ERROR\n");
+ "got HYPER_DMABUF_REQ_ERROR\n");
}
}

ring->rsp_cons = i;

- if (i != ring->req_prod_pvt) {
+ if (i != ring->req_prod_pvt)
RING_FINAL_CHECK_FOR_RESPONSES(ring, more_to_do);
- } else {
+ else
ring->sring->rsp_event = i+1;
- }
+
} while (more_to_do);

return IRQ_HANDLED;
diff --git a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.h b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.h
index 80741c1..8e2d1d0 100644
--- a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.h
+++ b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm.h
@@ -29,23 +29,25 @@
#include "xen/xenbus.h"
#include "../hyper_dmabuf_msg.h"

+extern int xenstored_ready;
+
DEFINE_RING_TYPES(xen_comm, struct hyper_dmabuf_req, struct hyper_dmabuf_resp);

struct xen_comm_tx_ring_info {
- struct xen_comm_front_ring ring_front;
+ struct xen_comm_front_ring ring_front;
int rdomain;
- int gref_ring;
- int irq;
- int port;
+ int gref_ring;
+ int irq;
+ int port;
struct mutex lock;
struct xenbus_watch watch;
};

struct xen_comm_rx_ring_info {
- int sdomain;
- int irq;
- int evtchn;
- struct xen_comm_back_ring ring_back;
+ int sdomain;
+ int irq;
+ int evtchn;
+ struct xen_comm_back_ring ring_back;
struct gnttab_unmap_grant_ref unmap_op;
};

@@ -70,6 +72,7 @@ void hyper_dmabuf_xen_cleanup_rx_rbuf(int domid);
void hyper_dmabuf_xen_destroy_comm(void);

/* send request to the remote domain */
-int hyper_dmabuf_xen_send_req(int domid, struct hyper_dmabuf_req *req, int wait);
+int hyper_dmabuf_xen_send_req(int domid, struct hyper_dmabuf_req *req,
+ int wait);

#endif // __HYPER_DMABUF_XEN_COMM_H__
diff --git a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.c b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.c
index 7a8ec73..343aab3 100644
--- a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.c
+++ b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.c
@@ -31,7 +31,6 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/cdev.h>
-#include <asm/uaccess.h>
#include <linux/hashtable.h>
#include <xen/grant_table.h>
#include "../hyper_dmabuf_drv.h"
@@ -41,7 +40,7 @@
DECLARE_HASHTABLE(xen_comm_tx_ring_hash, MAX_ENTRY_TX_RING);
DECLARE_HASHTABLE(xen_comm_rx_ring_hash, MAX_ENTRY_RX_RING);

-void xen_comm_ring_table_init()
+void xen_comm_ring_table_init(void)
{
hash_init(xen_comm_rx_ring_hash);
hash_init(xen_comm_tx_ring_hash);
@@ -53,11 +52,8 @@ int xen_comm_add_tx_ring(struct xen_comm_tx_ring_info *ring_info)

info_entry = kmalloc(sizeof(*info_entry), GFP_KERNEL);

- if (!info_entry) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!info_entry)
return -ENOMEM;
- }

info_entry->info = ring_info;

@@ -73,11 +69,8 @@ int xen_comm_add_rx_ring(struct xen_comm_rx_ring_info *ring_info)

info_entry = kmalloc(sizeof(*info_entry), GFP_KERNEL);

- if (!info_entry) {
- dev_err(hy_drv_priv->dev,
- "No memory left to be allocated\n");
+ if (!info_entry)
return -ENOMEM;
- }

info_entry->info = ring_info;

@@ -93,7 +86,7 @@ struct xen_comm_tx_ring_info *xen_comm_find_tx_ring(int domid)
int bkt;

hash_for_each(xen_comm_tx_ring_hash, bkt, info_entry, node)
- if(info_entry->info->rdomain == domid)
+ if (info_entry->info->rdomain == domid)
return info_entry->info;

return NULL;
@@ -105,7 +98,7 @@ struct xen_comm_rx_ring_info *xen_comm_find_rx_ring(int domid)
int bkt;

hash_for_each(xen_comm_rx_ring_hash, bkt, info_entry, node)
- if(info_entry->info->sdomain == domid)
+ if (info_entry->info->sdomain == domid)
return info_entry->info;

return NULL;
@@ -117,7 +110,7 @@ int xen_comm_remove_tx_ring(int domid)
int bkt;

hash_for_each(xen_comm_tx_ring_hash, bkt, info_entry, node)
- if(info_entry->info->rdomain == domid) {
+ if (info_entry->info->rdomain == domid) {
hash_del(&info_entry->node);
kfree(info_entry);
return 0;
@@ -132,7 +125,7 @@ int xen_comm_remove_rx_ring(int domid)
int bkt;

hash_for_each(xen_comm_rx_ring_hash, bkt, info_entry, node)
- if(info_entry->info->sdomain == domid) {
+ if (info_entry->info->sdomain == domid) {
hash_del(&info_entry->node);
kfree(info_entry);
return 0;
diff --git a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.h b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.h
index cde8ade..8502fe7 100644
--- a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.h
+++ b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_comm_list.h
@@ -31,13 +31,13 @@
#define MAX_ENTRY_RX_RING 7

struct xen_comm_tx_ring_info_entry {
- struct xen_comm_tx_ring_info *info;
- struct hlist_node node;
+ struct xen_comm_tx_ring_info *info;
+ struct hlist_node node;
};

struct xen_comm_rx_ring_info_entry {
- struct xen_comm_rx_ring_info *info;
- struct hlist_node node;
+ struct xen_comm_rx_ring_info *info;
+ struct hlist_node node;
};

void xen_comm_ring_table_init(void);
@@ -54,10 +54,14 @@ struct xen_comm_tx_ring_info *xen_comm_find_tx_ring(int domid);

struct xen_comm_rx_ring_info *xen_comm_find_rx_ring(int domid);

-/* iterates over all exporter rings and calls provided function for each of them */
+/* iterates over all exporter rings and calls provided
+ * function for each of them
+ */
void xen_comm_foreach_tx_ring(void (*func)(int domid));

-/* iterates over all importer rings and calls provided function for each of them */
+/* iterates over all importer rings and calls provided
+ * function for each of them
+ */
void xen_comm_foreach_rx_ring(void (*func)(int domid));

#endif // __HYPER_DMABUF_XEN_COMM_LIST_H__
diff --git a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.h b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.h
index c5fec24..e5bff09 100644
--- a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.h
+++ b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.h
@@ -34,11 +34,20 @@ extern struct hyper_dmabuf_backend_ops xen_backend_ops;
* when unsharing.
*/
struct xen_shared_pages_info {
- grant_ref_t lvl3_gref; /* top level refid */
- grant_ref_t *lvl3_table; /* page of top level addressing, it contains refids of 2nd level pages */
- grant_ref_t *lvl2_table; /* table of 2nd level pages, that contains refids to data pages */
- struct gnttab_unmap_grant_ref* unmap_ops; /* unmap ops for mapped pages */
- struct page **data_pages; /* data pages to be unmapped */
+ /* top level refid */
+ grant_ref_t lvl3_gref;
+
+ /* page of top level addressing, it contains refids of 2nd lvl pages */
+ grant_ref_t *lvl3_table;
+
+ /* table of 2nd level pages, that contains refids to data pages */
+ grant_ref_t *lvl2_table;
+
+ /* unmap ops for mapped pages */
+ struct gnttab_unmap_grant_ref *unmap_ops;
+
+ /* data pages to be unmapped */
+ struct page **data_pages;
};

#endif // __HYPER_DMABUF_XEN_COMM_H__
diff --git a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.c b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.c
index 424417d..a86313a 100644
--- a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.c
+++ b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.c
@@ -40,19 +40,21 @@
* Creates 2 level page directory structure for referencing shared pages.
* Top level page is a single page that contains up to 1024 refids that
* point to 2nd level pages.
+ *
* Each 2nd level page contains up to 1024 refids that point to shared
* data pages.
+ *
* There will always be one top level page and number of 2nd level pages
* depends on number of shared data pages.
*
* 3rd level page 2nd level pages Data pages
- * +-------------------------+ ┌>+--------------------+ ┌--->+------------+
- * |2nd level page 0 refid |---┘ |Data page 0 refid |-┘ |Data page 0 |
- * |2nd level page 1 refid |---┐ |Data page 1 refid |-┐ +------------+
+ * +-------------------------+ ┌>+--------------------+ ┌>+------------+
+ * |2nd level page 0 refid |---┘ |Data page 0 refid |-┘ |Data page 0 |
+ * |2nd level page 1 refid |---┐ |Data page 1 refid |-┐ +------------+
* | ... | | | .... | |
- * |2nd level page 1023 refid|-┐ | |Data page 1023 refid| └--->+------------+
- * +-------------------------+ | | +--------------------+ |Data page 1 |
- * | | +------------+
+ * |2nd level page 1023 refid|-┐ | |Data page 1023 refid| └>+------------+
+ * +-------------------------+ | | +--------------------+ |Data page 1 |
+ * | | +------------+
* | └>+--------------------+
* | |Data page 1024 refid|
* | |Data page 1025 refid|
@@ -65,9 +67,8 @@
* |Data page 1047552 refid|
* |Data page 1047553 refid|
* | ... |
- * |Data page 1048575 refid|-->+------------------+
- * +-----------------------+ |Data page 1048575 |
- * +------------------+
+ * |Data page 1048575 refid|
+ * +-----------------------+
*
* Using such 2 level structure it is possible to reference up to 4GB of
* shared data using single refid pointing to top level page.
@@ -85,7 +86,7 @@ int hyper_dmabuf_xen_share_pages(struct page **pages, int domid, int nents,
* Calculate number of pages needed for 2nd level addresing:
*/
int n_lvl2_grefs = (nents/REFS_PER_PAGE +
- ((nents % REFS_PER_PAGE) ? 1: 0));
+ ((nents % REFS_PER_PAGE) ? 1 : 0));

struct xen_shared_pages_info *sh_pages_info;
int i;
@@ -95,23 +96,22 @@ int hyper_dmabuf_xen_share_pages(struct page **pages, int domid, int nents,

sh_pages_info = kmalloc(sizeof(*sh_pages_info), GFP_KERNEL);

- if (!sh_pages_info) {
- dev_err(hy_drv_priv->dev, "No more space left\n");
+ if (!sh_pages_info)
return -ENOMEM;
- }

*refs_info = (void *)sh_pages_info;

/* share data pages in readonly mode for security */
- for (i=0; i<nents; i++) {
+ for (i = 0; i < nents; i++) {
lvl2_table[i] = gnttab_grant_foreign_access(domid,
pfn_to_mfn(page_to_pfn(pages[i])),
- true /* read-only from remote domain */);
+ true /* read only */);
if (lvl2_table[i] == -ENOSPC) {
- dev_err(hy_drv_priv->dev, "No more space left in grant table\n");
+ dev_err(hy_drv_priv->dev,
+ "No more space left in grant table\n");

/* Unshare all already shared pages for lvl2 */
- while(i--) {
+ while (i--) {
gnttab_end_foreign_access_ref(lvl2_table[i], 0);
gnttab_free_grant_reference(lvl2_table[i]);
}
@@ -120,23 +120,26 @@ int hyper_dmabuf_xen_share_pages(struct page **pages, int domid, int nents,
}

/* Share 2nd level addressing pages in readonly mode*/
- for (i=0; i< n_lvl2_grefs; i++) {
+ for (i = 0; i < n_lvl2_grefs; i++) {
lvl3_table[i] = gnttab_grant_foreign_access(domid,
- virt_to_mfn((unsigned long)lvl2_table+i*PAGE_SIZE ),
+ virt_to_mfn(
+ (unsigned long)lvl2_table+i*PAGE_SIZE),
true);

if (lvl3_table[i] == -ENOSPC) {
- dev_err(hy_drv_priv->dev, "No more space left in grant table\n");
+ dev_err(hy_drv_priv->dev,
+ "No more space left in grant table\n");

/* Unshare all already shared pages for lvl3 */
- while(i--) {
+ while (i--) {
gnttab_end_foreign_access_ref(lvl3_table[i], 1);
gnttab_free_grant_reference(lvl3_table[i]);
}

/* Unshare all pages for lvl2 */
- while(nents--) {
- gnttab_end_foreign_access_ref(lvl2_table[nents], 0);
+ while (nents--) {
+ gnttab_end_foreign_access_ref(
+ lvl2_table[nents], 0);
gnttab_free_grant_reference(lvl2_table[nents]);
}

@@ -150,16 +153,17 @@ int hyper_dmabuf_xen_share_pages(struct page **pages, int domid, int nents,
true);

if (lvl3_gref == -ENOSPC) {
- dev_err(hy_drv_priv->dev, "No more space left in grant table\n");
+ dev_err(hy_drv_priv->dev,
+ "No more space left in grant table\n");

/* Unshare all pages for lvl3 */
- while(i--) {
+ while (i--) {
gnttab_end_foreign_access_ref(lvl3_table[i], 1);
gnttab_free_grant_reference(lvl3_table[i]);
}

/* Unshare all pages for lvl2 */
- while(nents--) {
+ while (nents--) {
gnttab_end_foreign_access_ref(lvl2_table[nents], 0);
gnttab_free_grant_reference(lvl2_table[nents]);
}
@@ -187,10 +191,11 @@ int hyper_dmabuf_xen_share_pages(struct page **pages, int domid, int nents,
return -ENOSPC;
}

-int hyper_dmabuf_xen_unshare_pages(void **refs_info, int nents) {
+int hyper_dmabuf_xen_unshare_pages(void **refs_info, int nents)
+{
struct xen_shared_pages_info *sh_pages_info;
int n_lvl2_grefs = (nents/REFS_PER_PAGE +
- ((nents % REFS_PER_PAGE) ? 1: 0));
+ ((nents % REFS_PER_PAGE) ? 1 : 0));
int i;

dev_dbg(hy_drv_priv->dev, "%s entry\n", __func__);
@@ -206,28 +211,28 @@ int hyper_dmabuf_xen_unshare_pages(void **refs_info, int nents) {

/* End foreign access for data pages, but do not free them */
for (i = 0; i < nents; i++) {
- if (gnttab_query_foreign_access(sh_pages_info->lvl2_table[i])) {
+ if (gnttab_query_foreign_access(sh_pages_info->lvl2_table[i]))
dev_warn(hy_drv_priv->dev, "refid not shared !!\n");
- }
+
gnttab_end_foreign_access_ref(sh_pages_info->lvl2_table[i], 0);
gnttab_free_grant_reference(sh_pages_info->lvl2_table[i]);
}

/* End foreign access for 2nd level addressing pages */
for (i = 0; i < n_lvl2_grefs; i++) {
- if (gnttab_query_foreign_access(sh_pages_info->lvl3_table[i])) {
+ if (gnttab_query_foreign_access(sh_pages_info->lvl3_table[i]))
dev_warn(hy_drv_priv->dev, "refid not shared !!\n");
- }
- if (!gnttab_end_foreign_access_ref(sh_pages_info->lvl3_table[i], 1)) {
+
+ if (!gnttab_end_foreign_access_ref(
+ sh_pages_info->lvl3_table[i], 1))
dev_warn(hy_drv_priv->dev, "refid still in use!!!\n");
- }
+
gnttab_free_grant_reference(sh_pages_info->lvl3_table[i]);
}

/* End foreign access for top level addressing page */
- if (gnttab_query_foreign_access(sh_pages_info->lvl3_gref)) {
+ if (gnttab_query_foreign_access(sh_pages_info->lvl3_gref))
dev_warn(hy_drv_priv->dev, "gref not shared !!\n");
- }

gnttab_end_foreign_access_ref(sh_pages_info->lvl3_gref, 1);
gnttab_free_grant_reference(sh_pages_info->lvl3_gref);
@@ -246,10 +251,11 @@ int hyper_dmabuf_xen_unshare_pages(void **refs_info, int nents) {
return 0;
}

-/*
- * Maps provided top level ref id and then return array of pages containing data refs.
+/* Maps provided top level ref id and then return array of pages
+ * containing data refs.
*/
-struct page ** hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid, int nents, void **refs_info)
+struct page **hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid,
+ int nents, void **refs_info)
{
struct page *lvl3_table_page;
struct page **lvl2_table_pages;
@@ -280,19 +286,19 @@ struct page ** hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid, int n
sh_pages_info = kmalloc(sizeof(*sh_pages_info), GFP_KERNEL);
*refs_info = (void *) sh_pages_info;

- lvl2_table_pages = kcalloc(sizeof(struct page*), n_lvl2_grefs,
+ lvl2_table_pages = kcalloc(n_lvl2_grefs, sizeof(struct page *),
GFP_KERNEL);

- data_pages = kcalloc(sizeof(struct page*), nents, GFP_KERNEL);
+ data_pages = kcalloc(nents, sizeof(struct page *), GFP_KERNEL);

- lvl2_map_ops = kcalloc(sizeof(*lvl2_map_ops), n_lvl2_grefs,
+ lvl2_map_ops = kcalloc(n_lvl2_grefs, sizeof(*lvl2_map_ops),
GFP_KERNEL);

- lvl2_unmap_ops = kcalloc(sizeof(*lvl2_unmap_ops), n_lvl2_grefs,
+ lvl2_unmap_ops = kcalloc(n_lvl2_grefs, sizeof(*lvl2_unmap_ops),
GFP_KERNEL);

- data_map_ops = kcalloc(sizeof(*data_map_ops), nents, GFP_KERNEL);
- data_unmap_ops = kcalloc(sizeof(*data_unmap_ops), nents, GFP_KERNEL);
+ data_map_ops = kcalloc(nents, sizeof(*data_map_ops), GFP_KERNEL);
+ data_unmap_ops = kcalloc(nents, sizeof(*data_unmap_ops), GFP_KERNEL);

/* Map top level addressing page */
if (gnttab_alloc_pages(1, &lvl3_table_page)) {
@@ -332,7 +338,8 @@ struct page ** hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid, int n
}

for (i = 0; i < n_lvl2_grefs; i++) {
- lvl2_table = (grant_ref_t *)pfn_to_kaddr(page_to_pfn(lvl2_table_pages[i]));
+ lvl2_table = (grant_ref_t *)pfn_to_kaddr(
+ page_to_pfn(lvl2_table_pages[i]));
gnttab_set_map_op(&lvl2_map_ops[i],
(unsigned long)lvl2_table, GNTMAP_host_map |
GNTMAP_readonly,
@@ -348,11 +355,11 @@ struct page ** hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid, int n
dev_err(hy_drv_priv->dev,
"xen: cannot unmap top level page\n");
return NULL;
- } else {
- /* Mark that page was unmapped */
- lvl3_unmap_ops.handle = -1;
}

+ /* Mark that page was unmapped */
+ lvl3_unmap_ops.handle = -1;
+
if (gnttab_map_refs(lvl2_map_ops, NULL,
lvl2_table_pages, n_lvl2_grefs)) {
dev_err(hy_drv_priv->dev,
@@ -384,19 +391,22 @@ struct page ** hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid, int n
lvl2_table = pfn_to_kaddr(page_to_pfn(lvl2_table_pages[i]));
for (j = 0; j < REFS_PER_PAGE; j++) {
gnttab_set_map_op(&data_map_ops[k],
- (unsigned long)pfn_to_kaddr(page_to_pfn(data_pages[k])),
+ (unsigned long)pfn_to_kaddr(
+ page_to_pfn(data_pages[k])),
GNTMAP_host_map | GNTMAP_readonly,
lvl2_table[j], domid);

gnttab_set_unmap_op(&data_unmap_ops[k],
- (unsigned long)pfn_to_kaddr(page_to_pfn(data_pages[k])),
+ (unsigned long)pfn_to_kaddr(
+ page_to_pfn(data_pages[k])),
GNTMAP_host_map | GNTMAP_readonly, -1);
k++;
}
}

/* for grefs in the last lvl2 table page */
- lvl2_table = pfn_to_kaddr(page_to_pfn(lvl2_table_pages[n_lvl2_grefs - 1]));
+ lvl2_table = pfn_to_kaddr(page_to_pfn(
+ lvl2_table_pages[n_lvl2_grefs - 1]));

for (j = 0; j < nents_last; j++) {
gnttab_set_map_op(&data_map_ops[k],
@@ -424,13 +434,12 @@ struct page ** hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid, int n
dev_err(hy_drv_priv->dev,
"Cannot unmap 2nd level refs\n");
return NULL;
- } else {
- /* Mark that pages were unmapped */
- for (i = 0; i < n_lvl2_grefs; i++) {
- lvl2_unmap_ops[i].handle = -1;
- }
}

+ /* Mark that pages were unmapped */
+ for (i = 0; i < n_lvl2_grefs; i++)
+ lvl2_unmap_ops[i].handle = -1;
+
for (i = 0; i < nents; i++) {
if (data_map_ops[i].status) {
dev_err(hy_drv_priv->dev,
@@ -483,7 +492,8 @@ struct page ** hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid, int n
return NULL;
}

-int hyper_dmabuf_xen_unmap_shared_pages(void **refs_info, int nents) {
+int hyper_dmabuf_xen_unmap_shared_pages(void **refs_info, int nents)
+{
struct xen_shared_pages_info *sh_pages_info;

dev_dbg(hy_drv_priv->dev, "%s entry\n", __func__);
@@ -498,7 +508,7 @@ int hyper_dmabuf_xen_unmap_shared_pages(void **refs_info, int nents) {
}

if (gnttab_unmap_refs(sh_pages_info->unmap_ops, NULL,
- sh_pages_info->data_pages, nents) ) {
+ sh_pages_info->data_pages, nents)) {
dev_err(hy_drv_priv->dev, "Cannot unmap data pages\n");
return -EFAULT;
}
diff --git a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.h b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.h
index 629ec0f..e7ae731 100644
--- a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.h
+++ b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_shm.h
@@ -25,18 +25,21 @@
#ifndef __HYPER_DMABUF_XEN_SHM_H__
#define __HYPER_DMABUF_XEN_SHM_H__

-/* This collects all reference numbers for 2nd level shared pages and create a table
- * with those in 1st level shared pages then return reference numbers for this top level
- * table. */
+/* This collects all reference numbers for 2nd level shared pages and
+ * create a table with those in 1st level shared pages then return reference
+ * numbers for this top level table.
+ */
int hyper_dmabuf_xen_share_pages(struct page **pages, int domid, int nents,
void **refs_info);

int hyper_dmabuf_xen_unshare_pages(void **refs_info, int nents);

-/* Maps provided top level ref id and then return array of pages containing data refs.
+/* Maps provided top level ref id and then return array of pages containing
+ * data refs.
*/
-struct page ** hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid, int nents,
- void **refs_info);
+struct page **hyper_dmabuf_xen_map_shared_pages(int lvl3_gref, int domid,
+ int nents,
+ void **refs_info);

int hyper_dmabuf_xen_unmap_shared_pages(void **refs_info, int nents);

diff --git a/include/uapi/xen/hyper_dmabuf.h b/include/uapi/xen/hyper_dmabuf.h
index e18dd9b..cb25299 100644
--- a/include/uapi/xen/hyper_dmabuf.h
+++ b/include/uapi/xen/hyper_dmabuf.h
@@ -28,8 +28,8 @@
#define MAX_SIZE_PRIV_DATA 192

typedef struct {
- int id;
- int rng_key[3]; /* 12bytes long random number */
+ int id;
+ int rng_key[3]; /* 12bytes long random number */
} hyper_dmabuf_id_t;

struct hyper_dmabuf_event_hdr {
@@ -115,20 +115,20 @@ struct ioctl_hyper_dmabuf_query {
/* DMABUF query */

enum hyper_dmabuf_query {
- HYPER_DMABUF_QUERY_TYPE = 0x10,
- HYPER_DMABUF_QUERY_EXPORTER,
- HYPER_DMABUF_QUERY_IMPORTER,
- HYPER_DMABUF_QUERY_SIZE,
- HYPER_DMABUF_QUERY_BUSY,
- HYPER_DMABUF_QUERY_UNEXPORTED,
- HYPER_DMABUF_QUERY_DELAYED_UNEXPORTED,
- HYPER_DMABUF_QUERY_PRIV_INFO_SIZE,
- HYPER_DMABUF_QUERY_PRIV_INFO,
+ HYPER_DMABUF_QUERY_TYPE = 0x10,
+ HYPER_DMABUF_QUERY_EXPORTER,
+ HYPER_DMABUF_QUERY_IMPORTER,
+ HYPER_DMABUF_QUERY_SIZE,
+ HYPER_DMABUF_QUERY_BUSY,
+ HYPER_DMABUF_QUERY_UNEXPORTED,
+ HYPER_DMABUF_QUERY_DELAYED_UNEXPORTED,
+ HYPER_DMABUF_QUERY_PRIV_INFO_SIZE,
+ HYPER_DMABUF_QUERY_PRIV_INFO,
};

enum hyper_dmabuf_status {
- EXPORTED= 0x01,
- IMPORTED,
+ EXPORTED = 0x01,
+ IMPORTED,
};

#endif //__LINUX_PUBLIC_HYPER_DMABUF_H__
--
2.7.4
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