interface/vchiq_arm/vchiq_2835_arm.o \
interface/vchiq_arm/vchiq_debugfs.o \
interface/vchiq_arm/vchiq_shim.o \
- interface/vchiq_arm/vchiq_util.o \
interface/vchiq_arm/vchiq_connected.o \
obj-$(CONFIG_SND_BCM2835) += bcm2835-audio/
return VCHIQ_ERROR;
}
+void vchiq_msg_queue_push(unsigned handle, struct vchiq_header *header)
+{
+ struct vchiq_service *service = find_service_by_handle(handle);
+ int pos;
+
+ while (service->msg_queue_write == service->msg_queue_read +
+ VCHIQ_MAX_SLOTS) {
+ if (wait_for_completion_interruptible(&service->msg_queue_pop))
+ flush_signals(current);
+ }
+
+ pos = service->msg_queue_write++ & (VCHIQ_MAX_SLOTS - 1);
+ service->msg_queue[pos] = header;
+
+ complete(&service->msg_queue_push);
+}
+EXPORT_SYMBOL(vchiq_msg_queue_push);
+
+struct vchiq_header *vchiq_msg_hold(unsigned handle)
+{
+ struct vchiq_service *service = find_service_by_handle(handle);
+ struct vchiq_header *header;
+ int pos;
+
+ if (service->msg_queue_write == service->msg_queue_read)
+ return NULL;
+
+ while (service->msg_queue_write == service->msg_queue_read) {
+ if (wait_for_completion_interruptible(&service->msg_queue_push))
+ flush_signals(current);
+ }
+
+ pos = service->msg_queue_read++ & (VCHIQ_MAX_SLOTS - 1);
+ header = service->msg_queue[pos];
+
+ complete(&service->msg_queue_pop);
+
+ return header;
+}
+EXPORT_SYMBOL(vchiq_msg_hold);
+
static int vchiq_validate_params(const struct vchiq_service_params *params)
{
if (!params->callback || !params->fourcc) {
service->state = state;
service->instance = instance;
service->service_use_count = 0;
+ service->msg_queue_read = 0;
+ service->msg_queue_write = 0;
init_bulk_queue(&service->bulk_tx);
init_bulk_queue(&service->bulk_rx);
init_completion(&service->remove_event);
init_completion(&service->bulk_remove_event);
+ init_completion(&service->msg_queue_pop);
+ init_completion(&service->msg_queue_push);
mutex_init(&service->bulk_mutex);
memset(&service->stats, 0, sizeof(service->stats));
+ memset(&service->msg_queue, 0, sizeof(service->msg_queue));
/* Although it is perfectly possible to use a spinlock
** to protect the creation of services, it is overkill as it
uint64_t bulk_tx_bytes;
uint64_t bulk_rx_bytes;
} stats;
+
+ int msg_queue_read;
+ int msg_queue_write;
+ struct completion msg_queue_pop;
+ struct completion msg_queue_push;
+ struct vchiq_header *msg_queue[VCHIQ_MAX_SLOTS];
};
/* The quota information is outside struct vchiq_service so that it can
extern enum vchiq_status vchiq_get_peer_version(unsigned int handle,
short *peer_version);
+extern void vchiq_msg_queue_push(unsigned handle, struct vchiq_header *header);
+extern struct vchiq_header *vchiq_msg_hold(unsigned handle);
#endif /* VCHIQ_IF_H */
struct vchi_service {
unsigned int handle;
- struct vchiu_queue queue;
-
vchi_callback callback;
void *callback_param;
};
{
struct vchiq_header *header;
- if (vchiu_queue_is_empty(&service->queue))
- return -1;
-
- header = vchiu_queue_pop(&service->queue);
+ header = vchiq_msg_hold(service->handle);
+ if (!header)
+ return -ENOENT;
*data = header->data;
*msg_size = header->size;
(struct vchi_service *)VCHIQ_GET_SERVICE_USERDATA(handle);
if (reason == VCHIQ_MESSAGE_AVAILABLE)
- vchiu_queue_push(&service->queue, header);
+ vchiq_msg_queue_push(service->handle, header);
service->callback(service->callback_param, reason, bulk_user);
struct vchi_service *service = kzalloc(sizeof(struct vchi_service), GFP_KERNEL);
if (service) {
- if (!vchiu_queue_init(&service->queue, 64)) {
- service->callback = setup->callback;
- service->callback_param = setup->callback_param;
- } else {
- kfree(service);
- service = NULL;
- }
+ service->callback = setup->callback;
+ service->callback_param = setup->callback_param;
}
return service;
static void service_free(struct vchi_service *service)
{
- if (service) {
- vchiu_queue_delete(&service->queue);
+ if (service)
kfree(service);
- }
}
int32_t vchi_service_open(struct vchiq_instance *instance,
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
-/* Copyright (c) 2010-2012 Broadcom. All rights reserved. */
-
-#include "vchiq_util.h"
-
-static inline int is_pow2(int i)
-{
- return i && !(i & (i - 1));
-}
-
-int vchiu_queue_init(struct vchiu_queue *queue, int size)
-{
- WARN_ON(!is_pow2(size));
-
- queue->size = size;
- queue->read = 0;
- queue->write = 0;
- queue->initialized = 1;
-
- init_completion(&queue->pop);
- init_completion(&queue->push);
-
- queue->storage = kcalloc(size, sizeof(struct vchiq_header *),
- GFP_KERNEL);
- if (!queue->storage) {
- vchiu_queue_delete(queue);
- return -ENOMEM;
- }
- return 0;
-}
-
-void vchiu_queue_delete(struct vchiu_queue *queue)
-{
- kfree(queue->storage);
-}
-
-int vchiu_queue_is_empty(struct vchiu_queue *queue)
-{
- return queue->read == queue->write;
-}
-
-void vchiu_queue_push(struct vchiu_queue *queue, struct vchiq_header *header)
-{
- if (!queue->initialized)
- return;
-
- while (queue->write == queue->read + queue->size) {
- if (wait_for_completion_interruptible(&queue->pop))
- flush_signals(current);
- }
-
- queue->storage[queue->write & (queue->size - 1)] = header;
- queue->write++;
-
- complete(&queue->push);
-}
-
-struct vchiq_header *vchiu_queue_pop(struct vchiu_queue *queue)
-{
- struct vchiq_header *header;
-
- while (queue->write == queue->read) {
- if (wait_for_completion_interruptible(&queue->push))
- flush_signals(current);
- }
-
- header = queue->storage[queue->read & (queue->size - 1)];
- queue->read++;
-
- complete(&queue->pop);
-
- return header;
-}
#include "vchiq_if.h"
-struct vchiu_queue {
- int size;
- int read;
- int write;
- int initialized;
-
- struct completion pop;
- struct completion push;
-
- struct vchiq_header **storage;
-};
-
-extern int vchiu_queue_init(struct vchiu_queue *queue, int size);
-extern void vchiu_queue_delete(struct vchiu_queue *queue);
-
-extern int vchiu_queue_is_empty(struct vchiu_queue *queue);
-
-extern void vchiu_queue_push(struct vchiu_queue *queue,
- struct vchiq_header *header);
-
-extern struct vchiq_header *vchiu_queue_pop(struct vchiu_queue *queue);
-
#endif
projects / users / hch / dma-mapping.git / commitdiff