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Message-ID: <20240831162435.191084-5-umang.jain@ideasonboard.com>
Date: Sat, 31 Aug 2024 21:54:32 +0530
From: Umang Jain <umang.jain@...asonboard.com>
To: Florian Fainelli <florian.fainelli@...adcom.com>,
Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-rpi-kernel@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-staging@...ts.linux.dev,
linux-kernel@...r.kernel.org,
Kieran Bingham <kieran.bingham@...asonboard.com>,
Arnd Bergmann <arnd@...db.de>,
Stefan Wahren <wahrenst@....net>,
Dave Stevenson <dave.stevenson@...pberrypi.com>,
Phil Elwell <phil@...pberrypi.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Umang Jain <umang.jain@...asonboard.com>
Subject: [PATCH v2 4/7] staging: vchiq_core: Factor out bulk transfer for (no/)callback mode
Factor out bulk transfer for VCHIQ_BULK_MODE_NOCALLBACK and
VCHIQ_BULK_MODE_CALLBACK mode into a separate dedicated function
bulk_xfer_callback_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.
bulk_xfer_callback_interruptible() also takes in 'mode' parameter to
differentiate between VCHIQ_BULK_MODE_NOCALLBACK and
VCHIQ_BULK_MODE_CALLBACK, which then is directly passed to
vchiq_bulk_xfer_queue_msg_interruptible() inside the function.
Adjust the calls to vchiq-dev.c ioctl interface and vchiq_arm.c
for the respective bulk transfers.
Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
---
.../interface/vchiq_arm/vchiq_arm.c | 15 +++----
.../interface/vchiq_arm/vchiq_core.c | 40 +++++++++++++++++++
.../interface/vchiq_arm/vchiq_core.h | 6 +++
.../interface/vchiq_arm/vchiq_dev.c | 6 +++
4 files changed, 60 insertions(+), 7 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 688c9b1be868..3dbeffc650d3 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -857,10 +857,10 @@ vchiq_bulk_transmit(struct vchiq_instance *instance, unsigned int handle, const
switch (mode) {
case VCHIQ_BULK_MODE_NOCALLBACK:
case VCHIQ_BULK_MODE_CALLBACK:
- ret = vchiq_bulk_transfer(instance, handle,
- (void *)data, NULL,
- size, userdata, mode,
- VCHIQ_BULK_TRANSMIT);
+ ret = vchiq_bulk_xfer_callback_interruptible(instance, handle,
+ (void *)data, NULL,
+ size, mode, userdata,
+ VCHIQ_BULK_TRANSMIT);
break;
case VCHIQ_BULK_MODE_BLOCKING:
ret = vchiq_blocking_bulk_transfer(instance, handle, (void *)data, size,
@@ -895,9 +895,10 @@ int vchiq_bulk_receive(struct vchiq_instance *instance, unsigned int handle,
switch (mode) {
case VCHIQ_BULK_MODE_NOCALLBACK:
case VCHIQ_BULK_MODE_CALLBACK:
- ret = vchiq_bulk_transfer(instance, handle, data, NULL,
- size, userdata,
- mode, VCHIQ_BULK_RECEIVE);
+ ret = vchiq_bulk_xfer_callback_interruptible(instance, handle,
+ (void *)data, NULL,
+ size, mode, userdata,
+ VCHIQ_BULK_RECEIVE);
break;
case VCHIQ_BULK_MODE_BLOCKING:
ret = vchiq_blocking_bulk_transfer(instance, handle, (void *)data, size,
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 b37899d46b57..51fe18499e87 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
@@ -3021,6 +3021,46 @@ vchiq_bulk_xfer_blocking_interruptible(struct vchiq_instance *instance, unsigned
return status;
}
+int
+vchiq_bulk_xfer_callback_interruptible(struct vchiq_instance *instance, unsigned int handle,
+ void *offset, void __user *uoffset, int size,
+ enum vchiq_bulk_mode mode, void *userdata,
+ enum vchiq_bulk_dir dir)
+{
+ struct vchiq_service *service = find_service_by_handle(instance, handle);
+ int status = -EINVAL;
+
+ if (!service)
+ goto error_exit;
+
+ if (mode != VCHIQ_BULK_MODE_CALLBACK &&
+ mode != VCHIQ_BULK_MODE_NOCALLBACK)
+ goto error_exit;
+
+ 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);
+ if (status)
+ goto error_exit;
+
+ vchiq_service_put(service);
+
+ return 0;
+
+error_exit:
+ if (service)
+ 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
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 2dd89101c1c6..9c8c076eaaeb 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
@@ -479,6 +479,12 @@ vchiq_bulk_xfer_blocking_interruptible(struct vchiq_instance *instance, unsigned
void *offset, void __user *uoffset, int size,
void __user *userdata, enum vchiq_bulk_dir dir);
+extern int
+vchiq_bulk_xfer_callback_interruptible(struct vchiq_instance *instance, unsigned int handle,
+ void *offset, void __user *uoffset, int size,
+ enum vchiq_bulk_mode mode, void *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 830633f2326b..169a2ffda996 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
@@ -336,6 +336,12 @@ static int vchiq_irq_queue_bulk_tx_rx(struct vchiq_instance *instance,
goto bulk_transfer_handled;
} else {
userdata = args->userdata;
+
+ status = vchiq_bulk_xfer_callback_interruptible(instance, args->handle, NULL,
+ args->data, args->size,
+ args->mode, userdata, dir);
+
+ goto bulk_transfer_handled;
}
status = vchiq_bulk_transfer(instance, args->handle, NULL, args->data, args->size,
--
2.45.2
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