[RFC PATCH v2 7/9] hyper_dmabuf: query ioctl for retreiving various hyper_DMABUF info
Add a new ioctl, "IOCTL_HYPER_DMABUF_QUERY" for the userspace to
retreive various information about hyper_DMABUF, currently being shared
across VMs.
Supported query items are as followed:
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,
};
Query IOCTL call with each query item above returns,
HYPER_DMABUF_QUERY_TYPE - type - EXPORTED/IMPORTED of hyper_DMABUF from
current VM's perspective.
HYPER_DMABUF_QUERY_EXPORTER - ID of exporting VM
HYPER_DMABUF_QUERY_IMPORTER - ID of importing VM
HYPER_DMABUF_QUERY_SIZE - size of shared buffer in byte
HYPER_DMABUF_QUERY_BUSY - true if hyper_DMABUF is being actively used
(e.g. attached and mapped by end-consumer)
HYPER_DMABUF_QUERY_UNEXPORTED - true if hyper_DMABUF has been unexported
on exporting VM's side.
HYPER_DMABUF_QUERY_DELAYED_UNEXPORTED - true if hyper_DMABUF is scheduled
to be unexported (still valid but will be unexported soon)
HYPER_DMABUF_QUERY_PRIV_INFO_SIZE - size of private information (given by
user application on exporter's side) attached to hyper_DMABUF
HYPER_DMABUF_QUERY_PRIV_INFO - private information attached to hyper_DMABUF
Signed-off-by: Dongwon Kim
Signed-off-by: Mateusz Polrola
---
drivers/dma-buf/hyper_dmabuf/Makefile | 1 +
drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c | 49 +-
drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_query.c | 174 ++
drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_query.h | 36 +
include/uapi/linux/hyper_dmabuf.h | 32
5 files changed, 291 insertions(+), 1 deletion(-)
create mode 100644 drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_query.c
create mode 100644 drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_query.h
diff --git a/drivers/dma-buf/hyper_dmabuf/Makefile
b/drivers/dma-buf/hyper_dmabuf/Makefile
index 702696f29215..578a669a0d3e 100644
--- a/drivers/dma-buf/hyper_dmabuf/Makefile
+++ b/drivers/dma-buf/hyper_dmabuf/Makefile
@@ -10,6 +10,7 @@ ifneq ($(KERNELRELEASE),)
hyper_dmabuf_msg.o \
hyper_dmabuf_id.o \
hyper_dmabuf_remote_sync.o \
+hyper_dmabuf_query.o \
ifeq ($(CONFIG_HYPER_DMABUF_XEN), y)
$(TARGET_MODULE)-objs += backends/xen/hyper_dmabuf_xen_comm.o \
diff --git a/drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c
b/drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c
index 168ccf98f710..e90e59cd0568 100644
--- a/drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c
+++ b/drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c
@@ -41,6 +41,7 @@
#include "hyper_dmabuf_msg.h"
#include "hyper_dmabuf_sgl_proc.h"
#include "hyper_dmabuf_ops.h"
+#include "hyper_dmabuf_query.h"
static int hyper_dmabuf_tx_ch_setup_ioctl(struct file *filp, void *data)
{
@@ -543,7 +544,6 @@ static int hyper_dmabuf_export_fd_ioctl(struct file *filp,
void *data)
hyper_dmabuf_create_req(req,
HYPER_DMABUF_EXPORT_FD_FAILED,
[0]);
-
bknd_ops->send_req(HYPER_DMABUF_DOM_ID(imported->hid),
req, false);
kfree(req);
@@ -682,6 +682,51 @@ int hyper_dmabuf_unexport_ioctl(struct file *filp, void
*data)
return 0;
}
+static int hyper_dmabuf_query_ioctl(struct file *filp, void *data)
+{
+ struct ioctl_hyper_dmabuf_query *query_attr =
+ (struct ioctl_hyper_dmabuf_query *)data;
+ struct exported_sgt_info *exported = NULL;
+ struct imported_sgt_info *imported = NULL;
+ int ret = 0;
+
+ if (HYPER_DMABUF_DOM_ID(query_attr->hid) == hy_drv_priv->domid) {
+ /* query for exported dmabuf */
+ exported = hyper_dmabuf_find_exported(query_attr->hid);
+ if (exported) {
+ ret = hyper_dmabuf_query_exported(exported,
+ query_attr->item,
+ _attr->info);
+ } else {
+ dev_err(hy_drv_priv->dev,
+ "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 */
+
[RFC PATCH v2 7/9] hyper_dmabuf: query ioctl for retreiving various hyper_DMABUF info
Add a new ioctl, "IOCTL_HYPER_DMABUF_QUERY" for the userspace to
retreive various information about hyper_DMABUF, currently being shared
across VMs.
Supported query items are as followed:
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,
};
Query IOCTL call with each query item above returns,
HYPER_DMABUF_QUERY_TYPE - type - EXPORTED/IMPORTED of hyper_DMABUF from
current VM's perspective.
HYPER_DMABUF_QUERY_EXPORTER - ID of exporting VM
HYPER_DMABUF_QUERY_IMPORTER - ID of importing VM
HYPER_DMABUF_QUERY_SIZE - size of shared buffer in byte
HYPER_DMABUF_QUERY_BUSY - true if hyper_DMABUF is being actively used
(e.g. attached and mapped by end-consumer)
HYPER_DMABUF_QUERY_UNEXPORTED - true if hyper_DMABUF has been unexported
on exporting VM's side.
HYPER_DMABUF_QUERY_DELAYED_UNEXPORTED - true if hyper_DMABUF is scheduled
to be unexported (still valid but will be unexported soon)
HYPER_DMABUF_QUERY_PRIV_INFO_SIZE - size of private information (given by
user application on exporter's side) attached to hyper_DMABUF
HYPER_DMABUF_QUERY_PRIV_INFO - private information attached to hyper_DMABUF
Signed-off-by: Dongwon Kim
Signed-off-by: Mateusz Polrola
---
drivers/dma-buf/hyper_dmabuf/Makefile | 1 +
drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c | 49 +-
drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_query.c | 174 ++
drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_query.h | 36 +
include/uapi/linux/hyper_dmabuf.h | 32
5 files changed, 291 insertions(+), 1 deletion(-)
create mode 100644 drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_query.c
create mode 100644 drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_query.h
diff --git a/drivers/dma-buf/hyper_dmabuf/Makefile
b/drivers/dma-buf/hyper_dmabuf/Makefile
index 702696f29215..578a669a0d3e 100644
--- a/drivers/dma-buf/hyper_dmabuf/Makefile
+++ b/drivers/dma-buf/hyper_dmabuf/Makefile
@@ -10,6 +10,7 @@ ifneq ($(KERNELRELEASE),)
hyper_dmabuf_msg.o \
hyper_dmabuf_id.o \
hyper_dmabuf_remote_sync.o \
+hyper_dmabuf_query.o \
ifeq ($(CONFIG_HYPER_DMABUF_XEN), y)
$(TARGET_MODULE)-objs += backends/xen/hyper_dmabuf_xen_comm.o \
diff --git a/drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c
b/drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c
index 168ccf98f710..e90e59cd0568 100644
--- a/drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c
+++ b/drivers/dma-buf/hyper_dmabuf/hyper_dmabuf_ioctl.c
@@ -41,6 +41,7 @@
#include "hyper_dmabuf_msg.h"
#include "hyper_dmabuf_sgl_proc.h"
#include "hyper_dmabuf_ops.h"
+#include "hyper_dmabuf_query.h"
static int hyper_dmabuf_tx_ch_setup_ioctl(struct file *filp, void *data)
{
@@ -543,7 +544,6 @@ static int hyper_dmabuf_export_fd_ioctl(struct file *filp,
void *data)
hyper_dmabuf_create_req(req,
HYPER_DMABUF_EXPORT_FD_FAILED,
[0]);
-
bknd_ops->send_req(HYPER_DMABUF_DOM_ID(imported->hid),
req, false);
kfree(req);
@@ -682,6 +682,51 @@ int hyper_dmabuf_unexport_ioctl(struct file *filp, void
*data)
return 0;
}
+static int hyper_dmabuf_query_ioctl(struct file *filp, void *data)
+{
+ struct ioctl_hyper_dmabuf_query *query_attr =
+ (struct ioctl_hyper_dmabuf_query *)data;
+ struct exported_sgt_info *exported = NULL;
+ struct imported_sgt_info *imported = NULL;
+ int ret = 0;
+
+ if (HYPER_DMABUF_DOM_ID(query_attr->hid) == hy_drv_priv->domid) {
+ /* query for exported dmabuf */
+ exported = hyper_dmabuf_find_exported(query_attr->hid);
+ if (exported) {
+ ret = hyper_dmabuf_query_exported(exported,
+ query_attr->item,
+ _attr->info);
+ } else {
+ dev_err(hy_drv_priv->dev,
+ "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 =
