Factor out bulk transfer for blocking mode into a separate dedicated
function bulk_xfer_blocking_interruptible(). It is suffixed by
"_interruptible" to denote that it can be interrupted and -EAGAIN
can be returned. It would be up to the users of the function to retry
the call in those cases.
Adjust the calls to vchiq-dev.c ioctl interface and vchiq_arm.c
for blocking bulk transfers.
Signed-off-by: Umang Jain <umang.jain@xxxxxxxxxxxxxxxx>
---
.../interface/vchiq_arm/vchiq_arm.c | 5 +-
.../interface/vchiq_arm/vchiq_core.c | 53 ++++++++++++++++---
.../interface/vchiq_arm/vchiq_core.h | 5 ++
.../interface/vchiq_arm/vchiq_dev.c | 6 +++
4 files changed, 60 insertions(+), 9 deletions(-)
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index c4d97dbf6ba8..688c9b1be868 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -968,9 +968,8 @@ vchiq_blocking_bulk_transfer(struct vchiq_instance *instance, unsigned int handl
return -ENOMEM;
}
- ret = vchiq_bulk_transfer(instance, handle, data, NULL, size,
- &waiter->bulk_waiter,
- VCHIQ_BULK_MODE_BLOCKING, dir);
+ ret = vchiq_bulk_xfer_blocking_interruptible(instance, handle, data, NULL, size,
+ &waiter->bulk_waiter, dir);
if ((ret != -EAGAIN) || fatal_signal_pending(current) || !waiter->bulk_waiter.bulk) {
struct vchiq_bulk *bulk = waiter->bulk_waiter.bulk;
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
index f36044bab194..ee247b423074 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
@@ -2985,6 +2985,37 @@ vchiq_remove_service(struct vchiq_instance *instance, unsigned int handle)
return status;
}
+int
+vchiq_bulk_xfer_blocking_interruptible(struct vchiq_instance *instance, unsigned int handle,
+ void *offset, void __user *uoffset, int size,
+ void __user *userdata, enum vchiq_bulk_dir dir)
+{
+ struct vchiq_service *service = find_service_by_handle(instance, handle);
+ enum vchiq_bulk_mode mode = VCHIQ_BULK_MODE_BLOCKING;
+ int status = -EINVAL;
+
+ if (!service)
+ return -EINVAL;
+
+ if (service->srvstate != VCHIQ_SRVSTATE_OPEN)
+ goto error_exit;
+
+ if (!offset && !uoffset)
+ goto error_exit;
+
+ if (vchiq_check_service(service))
+ goto error_exit;
+
+
+ status = vchiq_bulk_xfer_queue_msg_interruptible(service, offset, uoffset, size,
+ userdata, mode, dir);
+
+error_exit:
+ vchiq_service_put(service);
+
+ return status;
+}
+
/*
* This function may be called by kernel threads or user threads.
* User threads may receive -EAGAIN to indicate that a signal has been
@@ -3018,12 +3049,6 @@ int vchiq_bulk_transfer(struct vchiq_instance *instance, unsigned int handle,
case VCHIQ_BULK_MODE_NOCALLBACK:
case VCHIQ_BULK_MODE_CALLBACK:
break;
- case VCHIQ_BULK_MODE_BLOCKING:
- bulk_waiter = userdata;
- init_completion(&bulk_waiter->event);
- bulk_waiter->actual = 0;
- bulk_waiter->bulk = NULL;
- break;
default:
goto error_exit;
}
@@ -3218,6 +3243,7 @@ vchiq_bulk_xfer_queue_msg_interruptible(struct vchiq_service *service,
enum vchiq_bulk_dir dir)
{
struct vchiq_bulk_queue *queue;
+ struct bulk_waiter *bulk_waiter = NULL;
struct vchiq_bulk *bulk;
struct vchiq_state *state = service->state;
const char dir_char = (dir == VCHIQ_BULK_TRANSMIT) ? 't' : 'r';
@@ -3226,6 +3252,13 @@ vchiq_bulk_xfer_queue_msg_interruptible(struct vchiq_service *service,
int status = -EINVAL;
int payload[2];
+ if (mode == VCHIQ_BULK_MODE_BLOCKING) {
+ bulk_waiter = userdata;
+ init_completion(&bulk_waiter->event);
+ bulk_waiter->actual = 0;
+ bulk_waiter->bulk = NULL;
+ }
+
queue = (dir == VCHIQ_BULK_TRANSMIT) ?
&service->bulk_tx : &service->bulk_rx;
@@ -3302,6 +3335,14 @@ vchiq_bulk_xfer_queue_msg_interruptible(struct vchiq_service *service,
state->id, service->localport, dir_char, queue->local_insert,
queue->remote_insert, queue->process);
+ if (bulk_waiter) {
+ bulk_waiter->bulk = bulk;
+ if (wait_for_completion_interruptible(&bulk_waiter->event))
+ status = -EAGAIN;
+ else if (bulk_waiter->actual == VCHIQ_BULK_ACTUAL_ABORTED)
+ status = -EINVAL;
+ }
+
return status;
unlock_both_error_exit:
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
index 985d9ea3a06a..2dd89101c1c6 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
@@ -474,6 +474,11 @@ extern int
vchiq_bulk_xfer_waiting_interruptible(struct vchiq_instance *instance,
unsigned int handle, struct bulk_waiter *userdata);
+extern int
+vchiq_bulk_xfer_blocking_interruptible(struct vchiq_instance *instance, unsigned int handle,
+ void *offset, void __user *uoffset, int size,
+ void __user *userdata, enum vchiq_bulk_dir dir);
+
extern int
vchiq_bulk_transfer(struct vchiq_instance *instance, unsigned int handle, void *offset,
void __user *uoffset, int size, void *userdata, enum vchiq_bulk_mode mode,
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
index 550838d2863b..830633f2326b 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
@@ -304,6 +304,12 @@ static int vchiq_irq_queue_bulk_tx_rx(struct vchiq_instance *instance,
}
userdata = &waiter->bulk_waiter;
+
+ status = vchiq_bulk_xfer_blocking_interruptible(instance, args->handle,
+ NULL, args->data, args->size,
+ userdata, dir);
+
+ goto bulk_transfer_handled;
} else if (args->mode == VCHIQ_BULK_MODE_WAITING) {
mutex_lock(&instance->bulk_waiter_list_mutex);
list_for_each_entry(iter, &instance->bulk_waiter_list,
--
2.45.0
