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Message-Id: <20200527115400.31391-44-nsaenzjulienne@suse.de>
Date: Wed, 27 May 2020 13:53:48 +0200
From: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To: bcm-kernel-feedback-list@...adcom.com,
linux-rpi-kernel@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: kernel-list@...pberrypi.com, laurent.pinchart@...asonboard.com,
gregkh@...uxfoundation.org,
Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
devel@...verdev.osuosl.org
Subject: [RFC 43/50] staging: vchi: Get rid of vchi_bulk_queue_receive()
Its vchiq counterpart, vchiq_bulk_receive() is only used by vchi. We can
then merge both functions by moving vchi_bulk_queue_receive()'s retry
mechanism into vchiq_bulk_receive() and let services call the later.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
---
.../vc04_services/interface/vchi/vchi.h | 7 ----
.../interface/vchiq_arm/vchiq_arm.c | 42 ++++++++++++-------
.../interface/vchiq_arm/vchiq_shim.c | 38 -----------------
.../vc04_services/vchiq-mmal/mmal-vchiq.c | 20 ++++-----
4 files changed, 37 insertions(+), 70 deletions(-)
diff --git a/drivers/staging/vc04_services/interface/vchi/vchi.h b/drivers/staging/vc04_services/interface/vchi/vchi.h
index d24e7027c08f..ca20b99122f2 100644
--- a/drivers/staging/vc04_services/interface/vchi/vchi.h
+++ b/drivers/staging/vc04_services/interface/vchi/vchi.h
@@ -58,13 +58,6 @@ extern int32_t vchi_held_msg_release(unsigned handle, struct vchiq_header *messa
* Global bulk API
*****************************************************************************/
-// Routine to prepare interface for a transfer from the other side
-extern int32_t vchi_bulk_queue_receive(unsigned handle,
- void *data_dst,
- uint32_t data_size,
- enum vchiq_bulk_mode mode,
- void *transfer_handle);
-
// Routine to queue up data ready for transfer to the other (once they have signalled they are ready)
extern int32_t vchi_bulk_queue_transmit(unsigned handle,
const void *data_src,
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 4d98d4d3ee8a..084e98b4ca61 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -380,24 +380,36 @@ vchiq_bulk_transmit(unsigned int handle, const void *data,
}
EXPORT_SYMBOL(vchiq_bulk_transmit);
-enum vchiq_status
-vchiq_bulk_receive(unsigned int handle, void *data,
- unsigned int size, void *userdata, enum vchiq_bulk_mode mode)
+enum vchiq_status vchiq_bulk_receive(unsigned int handle, void *data,
+ unsigned int size, void *userdata,
+ enum vchiq_bulk_mode mode)
{
enum vchiq_status status;
- switch (mode) {
- case VCHIQ_BULK_MODE_NOCALLBACK:
- case VCHIQ_BULK_MODE_CALLBACK:
- status = vchiq_bulk_transfer(handle, data, size, userdata,
- mode, VCHIQ_BULK_RECEIVE);
- break;
- case VCHIQ_BULK_MODE_BLOCKING:
- status = vchiq_blocking_bulk_transfer(handle,
- (void *)data, size, VCHIQ_BULK_RECEIVE);
- break;
- default:
- return VCHIQ_ERROR;
+ while (1) {
+ switch (mode) {
+ case VCHIQ_BULK_MODE_NOCALLBACK:
+ case VCHIQ_BULK_MODE_CALLBACK:
+ status = vchiq_bulk_transfer(handle, data, size, userdata,
+ mode, VCHIQ_BULK_RECEIVE);
+ break;
+ case VCHIQ_BULK_MODE_BLOCKING:
+ status = vchiq_blocking_bulk_transfer(handle,
+ (void *)data, size, VCHIQ_BULK_RECEIVE);
+ break;
+ default:
+ return VCHIQ_ERROR;
+ }
+
+ /*
+ * vchiq_*_bulk_transfer() may return VCHIQ_RETRY, so we need
+ * to implement a retry mechanism since this function is
+ * supposed to block until queued
+ */
+ if (status != VCHIQ_RETRY)
+ break;
+
+ msleep(1);
}
return status;
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_shim.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_shim.c
index 52654123463d..f69936a9eb29 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_shim.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_shim.c
@@ -31,44 +31,6 @@ int vchi_queue_kernel_message(unsigned handle, void *data, unsigned int size)
}
EXPORT_SYMBOL(vchi_queue_kernel_message);
-/***********************************************************
- * Name: vchi_bulk_queue_receive
- *
- * Arguments: VCHI_BULK_HANDLE_T handle,
- * void *data_dst,
- * const uint32_t data_size,
- * enum vchi_flags flags
- * void *bulk_handle
- *
- * Description: Routine to setup a rcv buffer
- *
- * Returns: int32_t - success == 0
- *
- ***********************************************************/
-int32_t vchi_bulk_queue_receive(unsigned handle, void *data_dst,
- uint32_t data_size, enum vchiq_bulk_mode mode,
- void *bulk_handle)
-{
- enum vchiq_status status;
-
- while (1) {
- status = vchiq_bulk_receive(handle, data_dst, data_size,
- bulk_handle, mode);
- /*
- * vchiq_bulk_receive() may return VCHIQ_RETRY, so we need to
- * implement a retry mechanism since this function is supposed
- * to block until queued
- */
- if (status != VCHIQ_RETRY)
- break;
-
- msleep(1);
- }
-
- return status;
-}
-EXPORT_SYMBOL(vchi_bulk_queue_receive);
-
/***********************************************************
* Name: vchi_bulk_queue_transmit
*
diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
index d35d2b50991b..b5d40074cdc7 100644
--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -277,7 +277,7 @@ static void buffer_work_cb(struct work_struct *work)
* VCHI will allow up to 4 bulk receives to be scheduled before blocking.
* If we block in the service_callback context then we can't process the
* VCHI_CALLBACK_BULK_RECEIVED message that would otherwise allow the blocked
- * vchi_bulk_queue_receive() call to complete.
+ * vchiq_bulk_receive() call to complete.
*/
static void buffer_to_host_work_cb(struct work_struct *work)
{
@@ -293,19 +293,19 @@ static void buffer_to_host_work_cb(struct work_struct *work)
len = 8;
/* queue the bulk submission */
vchi_service_use(instance->service_handle);
- ret = vchi_bulk_queue_receive(instance->service_handle,
- msg_context->u.bulk.buffer->buffer,
- /* Actual receive needs to be a multiple
- * of 4 bytes
- */
- (len + 3) & ~3,
- VCHIQ_BULK_MODE_CALLBACK,
- msg_context);
+ ret = vchiq_bulk_receive(instance->service_handle,
+ msg_context->u.bulk.buffer->buffer,
+ /* Actual receive needs to be a multiple
+ * of 4 bytes
+ */
+ (len + 3) & ~3,
+ msg_context,
+ VCHIQ_BULK_MODE_CALLBACK);
vchi_service_release(instance->service_handle);
if (ret != 0)
- pr_err("%s: ctx: %p, vchi_bulk_queue_receive failed %d\n",
+ pr_err("%s: ctx: %p, vchiq_bulk_receive failed %d\n",
__func__, msg_context, ret);
}
--
2.26.2
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