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Date: Tue, 12 Jul 2022 14:19:28 -0400
From: Joel Slebodnick <jslebodn@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Joel Slebodnick <jslebodn@...hat.com>, gregkh@...uxfoundation.org,
f.fainelli@...il.com, rjui@...adcom.com, sbranden@...adcom.com,
bcm-kernel-feedback-list@...adcom.com, nsaenz@...nel.org,
athierry@...hat.com, gustavoars@...nel.org, keescook@...omium.org,
stefan.wahren@...e.com, gascoar@...il.com, ojaswin98@...il.com,
len.baker@....com, jakobkoschel@...il.com,
linux-staging@...ts.linux.dev,
linux-rpi-kernel@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, jsavitz@...hat.com
Subject: [PATCH] remove custom return values in vc04_services
Remove all instances of enum vchiq_status from vc04_services and replace
them with regular linux error values.
VCHIQ_SUCCESS replaced with 0, VCHIQ_ERROR replaced with -EINVAL, and
VCHIQ_RETRY replaced (for the most part) with -EINTR as VCHIQ_RETRY
often is returned from an interruptable function call.
The exceptions to this are vchiq_send_remote_use() and
vchiq_send_remote_use_active() as they return a VCHIQ_RETRY but have
been changed to return -EINVAL instead of -EINTR. This is because when
the conn_state is VCHIQ_CONNSTATE_DISCONNECTED, the state is not valid
to continue on in the function
Signed-off-by: Joel Slebodnick <jslebodn@...hat.com>
---
.../bcm2835-audio/bcm2835-vchiq.c | 10 +-
.../include/linux/raspberrypi/vchiq.h | 67 +++---
drivers/staging/vc04_services/interface/TODO | 5 -
.../interface/vchiq_arm/vchiq_arm.c | 122 +++++-----
.../interface/vchiq_arm/vchiq_arm.h | 12 +-
.../interface/vchiq_arm/vchiq_core.c | 220 +++++++++---------
.../interface/vchiq_arm/vchiq_core.h | 18 +-
.../interface/vchiq_arm/vchiq_dev.c | 38 ++-
.../interface/vchiq_arm/vchiq_ioctl.h | 8 +-
9 files changed, 238 insertions(+), 262 deletions(-)
diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
index e429b33b4d39..e3c1362b4add 100644
--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
@@ -89,15 +89,15 @@ static int bcm2835_audio_send_simple(struct bcm2835_audio_instance *instance,
return bcm2835_audio_send_msg(instance, &m, wait);
}
-static enum vchiq_status audio_vchi_callback(enum vchiq_reason reason,
- struct vchiq_header *header,
- unsigned int handle, void *userdata)
+static int audio_vchi_callback(enum vchiq_reason reason,
+ struct vchiq_header *header,
+ unsigned int handle, void *userdata)
{
struct bcm2835_audio_instance *instance = vchiq_get_service_userdata(handle);
struct vc_audio_msg *m;
if (reason != VCHIQ_MESSAGE_AVAILABLE)
- return VCHIQ_SUCCESS;
+ return 0;
m = (void *)header->data;
if (m->type == VC_AUDIO_MSG_TYPE_RESULT) {
@@ -115,7 +115,7 @@ static enum vchiq_status audio_vchi_callback(enum vchiq_reason reason,
}
vchiq_release_message(handle, header);
- return VCHIQ_SUCCESS;
+ return 0;
}
static int
diff --git a/drivers/staging/vc04_services/include/linux/raspberrypi/vchiq.h b/drivers/staging/vc04_services/include/linux/raspberrypi/vchiq.h
index c93f2f3e87bb..81aa87654d3a 100644
--- a/drivers/staging/vc04_services/include/linux/raspberrypi/vchiq.h
+++ b/drivers/staging/vc04_services/include/linux/raspberrypi/vchiq.h
@@ -17,12 +17,6 @@ enum vchiq_reason {
VCHIQ_BULK_RECEIVE_ABORTED /* service, -, bulk_userdata */
};
-enum vchiq_status {
- VCHIQ_ERROR = -1,
- VCHIQ_SUCCESS = 0,
- VCHIQ_RETRY = 1
-};
-
enum vchiq_bulk_mode {
VCHIQ_BULK_MODE_CALLBACK,
VCHIQ_BULK_MODE_BLOCKING,
@@ -55,10 +49,10 @@ struct vchiq_element {
struct vchiq_service_base {
int fourcc;
- enum vchiq_status (*callback)(enum vchiq_reason reason,
- struct vchiq_header *header,
- unsigned int handle,
- void *bulk_userdata);
+ int (*callback)(enum vchiq_reason reason,
+ struct vchiq_header *header,
+ unsigned int handle,
+ void *bulk_userdata);
void *userdata;
};
@@ -71,10 +65,10 @@ struct vchiq_completion_data_kernel {
struct vchiq_service_params_kernel {
int fourcc;
- enum vchiq_status (*callback)(enum vchiq_reason reason,
- struct vchiq_header *header,
- unsigned int handle,
- void *bulk_userdata);
+ int (*callback)(enum vchiq_reason reason,
+ struct vchiq_header *header,
+ unsigned int handle,
+ void *bulk_userdata);
void *userdata;
short version; /* Increment for non-trivial changes */
short version_min; /* Update for incompatible changes */
@@ -82,29 +76,26 @@ struct vchiq_service_params_kernel {
struct vchiq_instance;
-extern enum vchiq_status vchiq_initialise(struct vchiq_instance **pinstance);
-extern enum vchiq_status vchiq_shutdown(struct vchiq_instance *instance);
-extern enum vchiq_status vchiq_connect(struct vchiq_instance *instance);
-extern enum vchiq_status vchiq_open_service(struct vchiq_instance *instance,
- const struct vchiq_service_params_kernel *params,
- unsigned int *pservice);
-extern enum vchiq_status vchiq_close_service(unsigned int service);
-extern enum vchiq_status vchiq_use_service(unsigned int service);
-extern enum vchiq_status vchiq_release_service(unsigned int service);
-extern void vchiq_msg_queue_push(unsigned int handle, struct vchiq_header *header);
-extern void vchiq_release_message(unsigned int service,
- struct vchiq_header *header);
-extern int vchiq_queue_kernel_message(unsigned int handle, void *data,
- unsigned int size);
-extern enum vchiq_status vchiq_bulk_transmit(unsigned int service,
- const void *data, unsigned int size, void *userdata,
- enum vchiq_bulk_mode mode);
-extern enum vchiq_status vchiq_bulk_receive(unsigned int service,
- void *data, unsigned int size, void *userdata,
- enum vchiq_bulk_mode mode);
-extern void *vchiq_get_service_userdata(unsigned int service);
-extern enum vchiq_status vchiq_get_peer_version(unsigned int handle,
- short *peer_version);
-extern struct vchiq_header *vchiq_msg_hold(unsigned int handle);
+int vchiq_initialise(struct vchiq_instance **pinstance);
+int vchiq_shutdown(struct vchiq_instance *instance);
+int vchiq_connect(struct vchiq_instance *instance);
+int vchiq_open_service(struct vchiq_instance *instance,
+ const struct vchiq_service_params_kernel *params,
+ unsigned int *pservice);
+int vchiq_close_service(unsigned int service);
+int vchiq_use_service(unsigned int service);
+int vchiq_release_service(unsigned int service);
+void vchiq_msg_queue_push(unsigned int handle, struct vchiq_header *header);
+void vchiq_release_message(unsigned int service, struct vchiq_header *header);
+int vchiq_queue_kernel_message(unsigned int handle, void *data,
+ unsigned int size);
+int vchiq_bulk_transmit(unsigned int service, const void *data,
+ unsigned int size, void *userdata,
+ enum vchiq_bulk_mode mode);
+int vchiq_bulk_receive(unsigned int service, void *data, unsigned int size,
+ void *userdata, enum vchiq_bulk_mode mode);
+void *vchiq_get_service_userdata(unsigned int service);
+int vchiq_get_peer_version(unsigned int handle, short *peer_version);
+struct vchiq_header *vchiq_msg_hold(unsigned int handle);
#endif /* VCHIQ_H */
diff --git a/drivers/staging/vc04_services/interface/TODO b/drivers/staging/vc04_services/interface/TODO
index 97085a0b3223..6d9d4a800aa7 100644
--- a/drivers/staging/vc04_services/interface/TODO
+++ b/drivers/staging/vc04_services/interface/TODO
@@ -40,11 +40,6 @@ beneficial to go over all of them and, if correct, comment on their merits.
Extra points to whomever confidently reviews the remote_event_*() family of
functions.
-* Get rid of custom function return values
-
-Most functions use a custom set of return values, we should force proper Linux
-error numbers. Special care is needed for VCHIQ_RETRY.
-
* Reformat core code with more sane indentations
The code follows the 80 characters limitation yet tends to go 3 or 4 levels of
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 0596ac61e286..c87b2ef5a59c 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -152,7 +152,7 @@ static struct device *g_dev;
static DEFINE_SEMAPHORE(g_free_fragments_mutex);
-static enum vchiq_status
+static int
vchiq_blocking_bulk_transfer(unsigned int handle, void *data,
unsigned int size, enum vchiq_bulk_dir dir);
@@ -720,13 +720,13 @@ void free_bulk_waiter(struct vchiq_instance *instance)
}
}
-enum vchiq_status vchiq_shutdown(struct vchiq_instance *instance)
+int vchiq_shutdown(struct vchiq_instance *instance)
{
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
struct vchiq_state *state = instance->state;
if (mutex_lock_killable(&state->mutex))
- return VCHIQ_RETRY;
+ return -EINTR;
/* Remove all services */
vchiq_shutdown_internal(state, instance);
@@ -747,19 +747,19 @@ static int vchiq_is_connected(struct vchiq_instance *instance)
return instance->connected;
}
-enum vchiq_status vchiq_connect(struct vchiq_instance *instance)
+int vchiq_connect(struct vchiq_instance *instance)
{
- enum vchiq_status status;
+ int status;
struct vchiq_state *state = instance->state;
if (mutex_lock_killable(&state->mutex)) {
vchiq_log_trace(vchiq_core_log_level, "%s: call to mutex_lock failed", __func__);
- status = VCHIQ_RETRY;
+ status = -EINTR;
goto failed;
}
status = vchiq_connect_internal(state, instance);
- if (status == VCHIQ_SUCCESS)
+ if (!status)
instance->connected = 1;
mutex_unlock(&state->mutex);
@@ -771,12 +771,12 @@ enum vchiq_status vchiq_connect(struct vchiq_instance *instance)
}
EXPORT_SYMBOL(vchiq_connect);
-static enum vchiq_status
+static int
vchiq_add_service(struct vchiq_instance *instance,
const struct vchiq_service_params_kernel *params,
unsigned int *phandle)
{
- enum vchiq_status status;
+ int status;
struct vchiq_state *state = instance->state;
struct vchiq_service *service = NULL;
int srvstate;
@@ -791,9 +791,9 @@ vchiq_add_service(struct vchiq_instance *instance,
if (service) {
*phandle = service->handle;
- status = VCHIQ_SUCCESS;
+ status = 0;
} else {
- status = VCHIQ_ERROR;
+ status = -EINVAL;
}
vchiq_log_trace(vchiq_core_log_level, "%s(%p): returning %d", __func__, instance, status);
@@ -801,12 +801,12 @@ vchiq_add_service(struct vchiq_instance *instance,
return status;
}
-enum vchiq_status
+int
vchiq_open_service(struct vchiq_instance *instance,
const struct vchiq_service_params_kernel *params,
unsigned int *phandle)
{
- enum vchiq_status status = VCHIQ_ERROR;
+ int status = -EINVAL;
struct vchiq_state *state = instance->state;
struct vchiq_service *service = NULL;
@@ -820,7 +820,7 @@ vchiq_open_service(struct vchiq_instance *instance,
if (service) {
*phandle = service->handle;
status = vchiq_open_service_internal(service, current->pid);
- if (status != VCHIQ_SUCCESS) {
+ if (status) {
vchiq_remove_service(service->handle);
*phandle = VCHIQ_SERVICE_HANDLE_INVALID;
}
@@ -833,11 +833,11 @@ vchiq_open_service(struct vchiq_instance *instance,
}
EXPORT_SYMBOL(vchiq_open_service);
-enum vchiq_status
+int
vchiq_bulk_transmit(unsigned int handle, const void *data, unsigned int size,
void *userdata, enum vchiq_bulk_mode mode)
{
- enum vchiq_status status;
+ int status;
while (1) {
switch (mode) {
@@ -853,15 +853,15 @@ vchiq_bulk_transmit(unsigned int handle, const void *data, unsigned int size,
VCHIQ_BULK_TRANSMIT);
break;
default:
- return VCHIQ_ERROR;
+ return -EINVAL;
}
/*
- * vchiq_*_bulk_transfer() may return VCHIQ_RETRY, so we need
+ * vchiq_*_bulk_transfer() may be interrupted, so we need
* to implement a retry mechanism since this function is
* supposed to block until queued
*/
- if (status != VCHIQ_RETRY)
+ if (status != -EINTR)
break;
msleep(1);
@@ -871,11 +871,11 @@ vchiq_bulk_transmit(unsigned int handle, const void *data, unsigned int size,
}
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)
+int vchiq_bulk_receive(unsigned int handle, void *data,
+ unsigned int size, void *userdata,
+ enum vchiq_bulk_mode mode)
{
- enum vchiq_status status;
+ int status;
while (1) {
switch (mode) {
@@ -890,15 +890,15 @@ enum vchiq_status vchiq_bulk_receive(unsigned int handle, void *data,
VCHIQ_BULK_RECEIVE);
break;
default:
- return VCHIQ_ERROR;
+ return -EINVAL;
}
/*
- * vchiq_*_bulk_transfer() may return VCHIQ_RETRY, so we need
+ * vchiq_*_bulk_transfer() may be interrupted, so we need
* to implement a retry mechanism since this function is
* supposed to block until queued
*/
- if (status != VCHIQ_RETRY)
+ if (status != -EINTR)
break;
msleep(1);
@@ -908,18 +908,18 @@ enum vchiq_status vchiq_bulk_receive(unsigned int handle, void *data,
}
EXPORT_SYMBOL(vchiq_bulk_receive);
-static enum vchiq_status
+static int
vchiq_blocking_bulk_transfer(unsigned int handle, void *data, unsigned int size,
enum vchiq_bulk_dir dir)
{
struct vchiq_instance *instance;
struct vchiq_service *service;
- enum vchiq_status status;
+ int status;
struct bulk_waiter_node *waiter = NULL, *iter;
service = find_service_by_handle(handle);
if (!service)
- return VCHIQ_ERROR;
+ return -EINVAL;
instance = service->instance;
@@ -955,14 +955,14 @@ vchiq_blocking_bulk_transfer(unsigned int handle, void *data, unsigned int size,
waiter = kzalloc(sizeof(*waiter), GFP_KERNEL);
if (!waiter) {
vchiq_log_error(vchiq_core_log_level, "%s - out of memory", __func__);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
}
status = vchiq_bulk_transfer(handle, data, NULL, size,
&waiter->bulk_waiter,
VCHIQ_BULK_MODE_BLOCKING, dir);
- if ((status != VCHIQ_RETRY) || fatal_signal_pending(current) || !waiter->bulk_waiter.bulk) {
+ if ((status != -EINTR) || fatal_signal_pending(current) || !waiter->bulk_waiter.bulk) {
struct vchiq_bulk *bulk = waiter->bulk_waiter.bulk;
if (bulk) {
@@ -984,7 +984,7 @@ vchiq_blocking_bulk_transfer(unsigned int handle, void *data, unsigned int size,
return status;
}
-static enum vchiq_status
+static int
add_completion(struct vchiq_instance *instance, enum vchiq_reason reason,
struct vchiq_header *header, struct user_service *user_service,
void *bulk_userdata)
@@ -1002,10 +1002,10 @@ add_completion(struct vchiq_instance *instance, enum vchiq_reason reason,
DEBUG_COUNT(COMPLETION_QUEUE_FULL_COUNT);
if (wait_for_completion_interruptible(&instance->remove_event)) {
vchiq_log_info(vchiq_arm_log_level, "service_callback interrupted");
- return VCHIQ_RETRY;
+ return -EINTR;
} else if (instance->closing) {
vchiq_log_info(vchiq_arm_log_level, "service_callback closing");
- return VCHIQ_SUCCESS;
+ return 0;
}
DEBUG_TRACE(SERVICE_CALLBACK_LINE);
}
@@ -1042,10 +1042,10 @@ add_completion(struct vchiq_instance *instance, enum vchiq_reason reason,
complete(&instance->insert_event);
- return VCHIQ_SUCCESS;
+ return 0;
}
-enum vchiq_status
+int
service_callback(enum vchiq_reason reason, struct vchiq_header *header,
unsigned int handle, void *bulk_userdata)
{
@@ -1068,7 +1068,7 @@ service_callback(enum vchiq_reason reason, struct vchiq_header *header,
service = handle_to_service(handle);
if (WARN_ON(!service)) {
rcu_read_unlock();
- return VCHIQ_SUCCESS;
+ return 0;
}
user_service = (struct user_service *)service->base.userdata;
@@ -1076,7 +1076,7 @@ service_callback(enum vchiq_reason reason, struct vchiq_header *header,
if (!instance || instance->closing) {
rcu_read_unlock();
- return VCHIQ_SUCCESS;
+ return 0;
}
/*
@@ -1106,14 +1106,14 @@ service_callback(enum vchiq_reason reason, struct vchiq_header *header,
*/
if ((user_service->message_available_pos -
instance->completion_remove) < 0) {
- enum vchiq_status status;
+ int status;
vchiq_log_info(vchiq_arm_log_level,
"Inserting extra MESSAGE_AVAILABLE");
DEBUG_TRACE(SERVICE_CALLBACK_LINE);
status = add_completion(instance, reason, NULL, user_service,
bulk_userdata);
- if (status != VCHIQ_SUCCESS) {
+ if (status) {
DEBUG_TRACE(SERVICE_CALLBACK_LINE);
vchiq_service_put(service);
return status;
@@ -1125,12 +1125,12 @@ service_callback(enum vchiq_reason reason, struct vchiq_header *header,
vchiq_log_info(vchiq_arm_log_level, "%s interrupted", __func__);
DEBUG_TRACE(SERVICE_CALLBACK_LINE);
vchiq_service_put(service);
- return VCHIQ_RETRY;
+ return -EINTR;
} else if (instance->closing) {
vchiq_log_info(vchiq_arm_log_level, "%s closing", __func__);
DEBUG_TRACE(SERVICE_CALLBACK_LINE);
vchiq_service_put(service);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
DEBUG_TRACE(SERVICE_CALLBACK_LINE);
spin_lock(&msg_queue_spinlock);
@@ -1161,7 +1161,7 @@ service_callback(enum vchiq_reason reason, struct vchiq_header *header,
vchiq_service_put(service);
if (skip_completion)
- return VCHIQ_SUCCESS;
+ return 0;
return add_completion(instance, reason, header, user_service,
bulk_userdata);
@@ -1317,7 +1317,7 @@ vchiq_get_state(void)
* Autosuspend related functionality
*/
-static enum vchiq_status
+static int
vchiq_keepalive_vchiq_callback(enum vchiq_reason reason,
struct vchiq_header *header,
unsigned int service_user, void *bulk_user)
@@ -1332,7 +1332,7 @@ vchiq_keepalive_thread_func(void *v)
struct vchiq_state *state = (struct vchiq_state *)v;
struct vchiq_arm_state *arm_state = vchiq_platform_get_arm_state(state);
- enum vchiq_status status;
+ int status;
struct vchiq_instance *instance;
unsigned int ka_handle;
int ret;
@@ -1352,14 +1352,14 @@ vchiq_keepalive_thread_func(void *v)
}
status = vchiq_connect(instance);
- if (status != VCHIQ_SUCCESS) {
+ if (status) {
vchiq_log_error(vchiq_susp_log_level, "%s vchiq_connect failed %d", __func__,
status);
goto shutdown;
}
status = vchiq_add_service(instance, ¶ms, &ka_handle);
- if (status != VCHIQ_SUCCESS) {
+ if (status) {
vchiq_log_error(vchiq_susp_log_level, "%s vchiq_open_service failed %d", __func__,
status);
goto shutdown;
@@ -1388,14 +1388,14 @@ vchiq_keepalive_thread_func(void *v)
while (uc--) {
atomic_inc(&arm_state->ka_use_ack_count);
status = vchiq_use_service(ka_handle);
- if (status != VCHIQ_SUCCESS) {
+ if (status) {
vchiq_log_error(vchiq_susp_log_level,
"%s vchiq_use_service error %d", __func__, status);
}
}
while (rc--) {
status = vchiq_release_service(ka_handle);
- if (status != VCHIQ_SUCCESS) {
+ if (status) {
vchiq_log_error(vchiq_susp_log_level,
"%s vchiq_release_service error %d", __func__,
status);
@@ -1448,13 +1448,13 @@ vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service,
write_unlock_bh(&arm_state->susp_res_lock);
if (!ret) {
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
long ack_cnt = atomic_xchg(&arm_state->ka_use_ack_count, 0);
- while (ack_cnt && (status == VCHIQ_SUCCESS)) {
+ while (ack_cnt && (!status)) {
/* Send the use notify to videocore */
status = vchiq_send_remote_use_active(state);
- if (status == VCHIQ_SUCCESS)
+ if (!status)
ack_cnt--;
else
atomic_add(ack_cnt, &arm_state->ka_use_ack_count);
@@ -1589,10 +1589,10 @@ vchiq_instance_set_trace(struct vchiq_instance *instance, int trace)
instance->trace = (trace != 0);
}
-enum vchiq_status
+int
vchiq_use_service(unsigned int handle)
{
- enum vchiq_status ret = VCHIQ_ERROR;
+ int ret = -EINVAL;
struct vchiq_service *service = find_service_by_handle(handle);
if (service) {
@@ -1603,10 +1603,10 @@ vchiq_use_service(unsigned int handle)
}
EXPORT_SYMBOL(vchiq_use_service);
-enum vchiq_status
+int
vchiq_release_service(unsigned int handle)
{
- enum vchiq_status ret = VCHIQ_ERROR;
+ int ret = -EINVAL;
struct vchiq_service *service = find_service_by_handle(handle);
if (service) {
@@ -1697,11 +1697,11 @@ vchiq_dump_service_use_state(struct vchiq_state *state)
kfree(service_data);
}
-enum vchiq_status
+int
vchiq_check_service(struct vchiq_service *service)
{
struct vchiq_arm_state *arm_state;
- enum vchiq_status ret = VCHIQ_ERROR;
+ int ret = -EINVAL;
if (!service || !service->state)
goto out;
@@ -1710,10 +1710,10 @@ vchiq_check_service(struct vchiq_service *service)
read_lock_bh(&arm_state->susp_res_lock);
if (service->service_use_count)
- ret = VCHIQ_SUCCESS;
+ ret = 0;
read_unlock_bh(&arm_state->susp_res_lock);
- if (ret == VCHIQ_ERROR) {
+ if (ret) {
vchiq_log_error(vchiq_susp_log_level,
"%s ERROR - %c%c%c%c:%d service count %d, state count %d", __func__,
VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc), service->client_id,
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
index 2aa46b119a46..03c2780594ea 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
@@ -85,13 +85,13 @@ extern struct vchiq_state g_state;
extern struct vchiq_state *
vchiq_get_state(void);
-enum vchiq_status
+int
vchiq_use_service(unsigned int handle);
-extern enum vchiq_status
+extern int
vchiq_release_service(unsigned int handle);
-extern enum vchiq_status
+extern int
vchiq_check_service(struct vchiq_service *service);
extern void
@@ -100,10 +100,10 @@ vchiq_dump_platform_use_state(struct vchiq_state *state);
extern void
vchiq_dump_service_use_state(struct vchiq_state *state);
-extern enum vchiq_status
+extern int
vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service,
enum USE_TYPE_E use_type);
-extern enum vchiq_status
+extern int
vchiq_release_internal(struct vchiq_state *state,
struct vchiq_service *service);
@@ -137,7 +137,7 @@ static inline int vchiq_register_chrdev(struct device *parent) { return 0; }
#endif /* IS_ENABLED(CONFIG_VCHIQ_CDEV) */
-extern enum vchiq_status
+extern int
service_callback(enum vchiq_reason reason, struct vchiq_header *header,
unsigned int handle, void *bulk_userdata);
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 8f99272dbd6f..3b08560b52a0 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
@@ -457,21 +457,21 @@ mark_service_closing(struct vchiq_service *service)
mark_service_closing_internal(service, 0);
}
-static inline enum vchiq_status
+static inline int
make_service_callback(struct vchiq_service *service, enum vchiq_reason reason,
struct vchiq_header *header, void *bulk_userdata)
{
- enum vchiq_status status;
+ int status;
vchiq_log_trace(vchiq_core_log_level, "%d: callback:%d (%s, %pK, %pK)",
service->state->id, service->localport, reason_names[reason],
header, bulk_userdata);
status = service->base.callback(reason, header, service->handle, bulk_userdata);
- if (status == VCHIQ_ERROR) {
+ if (status && (status != -EINTR)) {
vchiq_log_warning(vchiq_core_log_level,
"%d: ignoring ERROR from callback to service %x",
service->state->id, service->handle);
- status = VCHIQ_SUCCESS;
+ status = 0;
}
if (reason != VCHIQ_MESSAGE_AVAILABLE)
@@ -891,7 +891,7 @@ copy_message_data(ssize_t (*copy_callback)(void *context, void *dest, size_t off
}
/* Called by the slot handler and application threads */
-static enum vchiq_status
+static int
queue_message(struct vchiq_state *state, struct vchiq_service *service,
int msgid,
ssize_t (*copy_callback)(void *context, void *dest,
@@ -913,7 +913,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service,
if (!(flags & QMFLAGS_NO_MUTEX_LOCK) &&
mutex_lock_killable(&state->slot_mutex))
- return VCHIQ_RETRY;
+ return -EINTR;
if (type == VCHIQ_MSG_DATA) {
int tx_end_index;
@@ -921,7 +921,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service,
if (!service) {
WARN(1, "%s: service is NULL\n", __func__);
mutex_unlock(&state->slot_mutex);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
WARN_ON(flags & (QMFLAGS_NO_MUTEX_LOCK |
@@ -930,7 +930,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service,
if (service->closing) {
/* The service has been closed */
mutex_unlock(&state->slot_mutex);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
quota = &state->service_quotas[service->localport];
@@ -954,7 +954,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service,
mutex_unlock(&state->slot_mutex);
if (wait_for_completion_interruptible(&state->data_quota_event))
- return VCHIQ_RETRY;
+ return -EINTR;
mutex_lock(&state->slot_mutex);
spin_lock("a_spinlock);
@@ -978,15 +978,15 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service,
VCHIQ_SERVICE_STATS_INC(service, quota_stalls);
mutex_unlock(&state->slot_mutex);
if (wait_for_completion_interruptible("a->quota_event))
- return VCHIQ_RETRY;
+ return -EINTR;
if (service->closing)
- return VCHIQ_ERROR;
+ return -EINVAL;
if (mutex_lock_killable(&state->slot_mutex))
- return VCHIQ_RETRY;
+ return -EINTR;
if (service->srvstate != VCHIQ_SRVSTATE_OPEN) {
/* The service has been closed */
mutex_unlock(&state->slot_mutex);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
spin_lock("a_spinlock);
tx_end_index = SLOT_QUEUE_INDEX_FROM_POS(state->local_tx_pos + stride - 1);
@@ -1006,7 +1006,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service,
*/
if (!(flags & QMFLAGS_NO_MUTEX_LOCK))
mutex_unlock(&state->slot_mutex);
- return VCHIQ_RETRY;
+ return -EINTR;
}
if (type == VCHIQ_MSG_DATA) {
@@ -1028,7 +1028,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service,
if (callback_result < 0) {
mutex_unlock(&state->slot_mutex);
VCHIQ_SERVICE_STATS_INC(service, error_count);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
if (SRVTRACE_ENABLED(service,
@@ -1126,11 +1126,11 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service,
remote_event_signal(&state->remote->trigger);
- return VCHIQ_SUCCESS;
+ return 0;
}
/* Called by the slot handler and application threads */
-static enum vchiq_status
+static int
queue_message_sync(struct vchiq_state *state, struct vchiq_service *service,
int msgid,
ssize_t (*copy_callback)(void *context, void *dest,
@@ -1145,7 +1145,7 @@ queue_message_sync(struct vchiq_state *state, struct vchiq_service *service,
if (VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_RESUME &&
mutex_lock_killable(&state->sync_mutex))
- return VCHIQ_RETRY;
+ return -EINTR;
remote_event_wait(&state->sync_release_event, &local->sync_release);
@@ -1175,7 +1175,7 @@ queue_message_sync(struct vchiq_state *state, struct vchiq_service *service,
if (callback_result < 0) {
mutex_unlock(&state->slot_mutex);
VCHIQ_SERVICE_STATS_INC(service, error_count);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
if (service) {
@@ -1213,7 +1213,7 @@ queue_message_sync(struct vchiq_state *state, struct vchiq_service *service,
if (VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_PAUSE)
mutex_unlock(&state->sync_mutex);
- return VCHIQ_SUCCESS;
+ return 0;
}
static inline void
@@ -1289,11 +1289,11 @@ get_bulk_reason(struct vchiq_bulk *bulk)
}
/* Called by the slot handler - don't hold the bulk mutex */
-static enum vchiq_status
+static int
notify_bulks(struct vchiq_service *service, struct vchiq_bulk_queue *queue,
int retry_poll)
{
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
vchiq_log_trace(vchiq_core_log_level, "%d: nb:%d %cx - p=%x rn=%x r=%x", service->state->id,
service->localport, (queue == &service->bulk_tx) ? 't' : 'r',
@@ -1338,7 +1338,7 @@ notify_bulks(struct vchiq_service *service, struct vchiq_bulk_queue *queue,
get_bulk_reason(bulk);
status = make_service_callback(service, reason, NULL,
bulk->userdata);
- if (status == VCHIQ_RETRY)
+ if (status == -EINTR)
break;
}
}
@@ -1347,9 +1347,9 @@ notify_bulks(struct vchiq_service *service, struct vchiq_bulk_queue *queue,
complete(&service->bulk_remove_event);
}
if (!retry_poll)
- status = VCHIQ_SUCCESS;
+ status = 0;
- if (status == VCHIQ_RETRY)
+ if (status == -EINTR)
request_poll(service->state, service, (queue == &service->bulk_tx) ?
VCHIQ_POLL_TXNOTIFY : VCHIQ_POLL_RXNOTIFY);
@@ -1388,13 +1388,12 @@ poll_services_of_group(struct vchiq_state *state, int group)
*/
service->public_fourcc = VCHIQ_FOURCC_INVALID;
- if (vchiq_close_service_internal(service, NO_CLOSE_RECVD) !=
- VCHIQ_SUCCESS)
+ if (vchiq_close_service_internal(service, NO_CLOSE_RECVD))
request_poll(state, service, VCHIQ_POLL_REMOVE);
} else if (service_flags & BIT(VCHIQ_POLL_TERMINATE)) {
vchiq_log_info(vchiq_core_log_level, "%d: ps - terminate %d<->%d",
state->id, service->localport, service->remoteport);
- if (vchiq_close_service_internal(service, NO_CLOSE_RECVD) != VCHIQ_SUCCESS)
+ if (vchiq_close_service_internal(service, NO_CLOSE_RECVD))
request_poll(state, service, VCHIQ_POLL_TERMINATE);
}
if (service_flags & BIT(VCHIQ_POLL_TXNOTIFY))
@@ -1517,14 +1516,14 @@ parse_open(struct vchiq_state *state, struct vchiq_header *header)
/* Acknowledge the OPEN */
if (service->sync) {
if (queue_message_sync(state, NULL, openack_id, memcpy_copy_callback,
- &ack_payload, sizeof(ack_payload), 0) == VCHIQ_RETRY)
+ &ack_payload, sizeof(ack_payload), 0) == -EINTR)
goto bail_not_ready;
/* The service is now open */
set_service_state(service, VCHIQ_SRVSTATE_OPENSYNC);
} else {
if (queue_message(state, NULL, openack_id, memcpy_copy_callback,
- &ack_payload, sizeof(ack_payload), 0) == VCHIQ_RETRY)
+ &ack_payload, sizeof(ack_payload), 0) == -EINTR)
goto bail_not_ready;
/* The service is now open */
@@ -1539,7 +1538,7 @@ parse_open(struct vchiq_state *state, struct vchiq_header *header)
fail_open:
/* No available service, or an invalid request - send a CLOSE */
if (queue_message(state, NULL, MAKE_CLOSE(0, VCHIQ_MSG_SRCPORT(msgid)),
- NULL, NULL, 0, 0) == VCHIQ_RETRY)
+ NULL, NULL, 0, 0) == -EINTR)
goto bail_not_ready;
return 1;
@@ -1678,7 +1677,7 @@ parse_message(struct vchiq_state *state, struct vchiq_header *header)
mark_service_closing_internal(service, 1);
- if (vchiq_close_service_internal(service, CLOSE_RECVD) == VCHIQ_RETRY)
+ if (vchiq_close_service_internal(service, CLOSE_RECVD) == -EINTR)
goto bail_not_ready;
vchiq_log_info(vchiq_core_log_level, "Close Service %c%c%c%c s:%u d:%d",
@@ -1695,7 +1694,7 @@ parse_message(struct vchiq_state *state, struct vchiq_header *header)
claim_slot(state->rx_info);
DEBUG_TRACE(PARSE_LINE);
if (make_service_callback(service, VCHIQ_MESSAGE_AVAILABLE, header,
- NULL) == VCHIQ_RETRY) {
+ NULL) == -EINTR) {
DEBUG_TRACE(PARSE_LINE);
goto bail_not_ready;
}
@@ -1793,7 +1792,7 @@ parse_message(struct vchiq_state *state, struct vchiq_header *header)
if (state->conn_state != VCHIQ_CONNSTATE_PAUSE_SENT) {
/* Send a PAUSE in response */
if (queue_message(state, NULL, MAKE_PAUSE, NULL, NULL, 0,
- QMFLAGS_NO_MUTEX_UNLOCK) == VCHIQ_RETRY)
+ QMFLAGS_NO_MUTEX_UNLOCK) == -EINTR)
goto bail_not_ready;
}
/* At this point slot_mutex is held */
@@ -1910,7 +1909,7 @@ handle_poll(struct vchiq_state *state)
case VCHIQ_CONNSTATE_PAUSING:
if (queue_message(state, NULL, MAKE_PAUSE, NULL, NULL, 0,
- QMFLAGS_NO_MUTEX_UNLOCK) != VCHIQ_RETRY) {
+ QMFLAGS_NO_MUTEX_UNLOCK) != -EINTR) {
vchiq_set_conn_state(state, VCHIQ_CONNSTATE_PAUSE_SENT);
} else {
/* Retry later */
@@ -1920,7 +1919,7 @@ handle_poll(struct vchiq_state *state)
case VCHIQ_CONNSTATE_RESUMING:
if (queue_message(state, NULL, MAKE_RESUME, NULL, NULL, 0,
- QMFLAGS_NO_MUTEX_LOCK) != VCHIQ_RETRY) {
+ QMFLAGS_NO_MUTEX_LOCK) != -EINTR) {
vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTED);
} else {
/*
@@ -2074,9 +2073,9 @@ sync_func(void *v)
if ((service->remoteport == remoteport) &&
(service->srvstate == VCHIQ_SRVSTATE_OPENSYNC)) {
if (make_service_callback(service, VCHIQ_MESSAGE_AVAILABLE, header,
- NULL) == VCHIQ_RETRY)
+ NULL) == -EINTR)
vchiq_log_error(vchiq_sync_log_level,
- "synchronous callback to service %d returns VCHIQ_RETRY",
+ "synchronous callback to service %d has been interrupted",
localport);
}
break;
@@ -2478,7 +2477,7 @@ vchiq_add_service_internal(struct vchiq_state *state,
return service;
}
-enum vchiq_status
+int
vchiq_open_service_internal(struct vchiq_service *service, int client_id)
{
struct vchiq_open_payload payload = {
@@ -2487,7 +2486,7 @@ vchiq_open_service_internal(struct vchiq_service *service, int client_id)
service->version,
service->version_min
};
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
service->client_id = client_id;
vchiq_use_service_internal(service);
@@ -2498,12 +2497,12 @@ vchiq_open_service_internal(struct vchiq_service *service, int client_id)
sizeof(payload),
QMFLAGS_IS_BLOCKING);
- if (status != VCHIQ_SUCCESS)
+ if (status)
return status;
/* Wait for the ACK/NAK */
if (wait_for_completion_interruptible(&service->remove_event)) {
- status = VCHIQ_RETRY;
+ status = -EINTR;
vchiq_release_service_internal(service);
} else if ((service->srvstate != VCHIQ_SRVSTATE_OPEN) &&
(service->srvstate != VCHIQ_SRVSTATE_OPENSYNC)) {
@@ -2513,11 +2512,10 @@ vchiq_open_service_internal(struct vchiq_service *service, int client_id)
service->state->id,
srvstate_names[service->srvstate],
kref_read(&service->ref_count));
- status = VCHIQ_ERROR;
+ status = -EINVAL;
VCHIQ_SERVICE_STATS_INC(service, error_count);
vchiq_release_service_internal(service);
}
-
return status;
}
@@ -2584,7 +2582,7 @@ release_service_messages(struct vchiq_service *service)
static int
do_abort_bulks(struct vchiq_service *service)
{
- enum vchiq_status status;
+ int status;
/* Abort any outstanding bulk transfers */
if (mutex_lock_killable(&service->bulk_mutex))
@@ -2594,17 +2592,17 @@ do_abort_bulks(struct vchiq_service *service)
mutex_unlock(&service->bulk_mutex);
status = notify_bulks(service, &service->bulk_tx, NO_RETRY_POLL);
- if (status != VCHIQ_SUCCESS)
+ if (status)
return 0;
status = notify_bulks(service, &service->bulk_rx, NO_RETRY_POLL);
- return (status == VCHIQ_SUCCESS);
+ return (!status);
}
-static enum vchiq_status
+static int
close_service_complete(struct vchiq_service *service, int failstate)
{
- enum vchiq_status status;
+ int status;
int is_server = (service->public_fourcc != VCHIQ_FOURCC_INVALID);
int newstate;
@@ -2631,12 +2629,12 @@ close_service_complete(struct vchiq_service *service, int failstate)
vchiq_log_error(vchiq_core_log_level, "%s(%x) called in state %s", __func__,
service->handle, srvstate_names[service->srvstate]);
WARN(1, "%s in unexpected state\n", __func__);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
status = make_service_callback(service, VCHIQ_SERVICE_CLOSED, NULL, NULL);
- if (status != VCHIQ_RETRY) {
+ if (status != -EINTR) {
int uc = service->service_use_count;
int i;
/* Complete the close process */
@@ -2661,16 +2659,15 @@ close_service_complete(struct vchiq_service *service, int failstate)
} else {
set_service_state(service, failstate);
}
-
return status;
}
/* Called by the slot handler */
-enum vchiq_status
+int
vchiq_close_service_internal(struct vchiq_service *service, int close_recvd)
{
struct vchiq_state *state = service->state;
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
int is_server = (service->public_fourcc != VCHIQ_FOURCC_INVALID);
int close_id = MAKE_CLOSE(service->localport,
VCHIQ_MSG_DSTPORT(service->remoteport));
@@ -2688,7 +2685,7 @@ vchiq_close_service_internal(struct vchiq_service *service, int close_recvd)
__func__, srvstate_names[service->srvstate]);
} else if (is_server) {
if (service->srvstate == VCHIQ_SRVSTATE_LISTENING) {
- status = VCHIQ_ERROR;
+ status = -EINVAL;
} else {
service->client_id = 0;
service->remoteport = VCHIQ_PORT_FREE;
@@ -2717,16 +2714,16 @@ vchiq_close_service_internal(struct vchiq_service *service, int close_recvd)
case VCHIQ_SRVSTATE_OPEN:
if (close_recvd) {
if (!do_abort_bulks(service))
- status = VCHIQ_RETRY;
+ status = -EINTR;
}
release_service_messages(service);
- if (status == VCHIQ_SUCCESS)
+ if (!status)
status = queue_message(state, service, close_id, NULL,
NULL, 0, QMFLAGS_NO_MUTEX_UNLOCK);
- if (status != VCHIQ_SUCCESS) {
+ if (status) {
if (service->srvstate == VCHIQ_SRVSTATE_OPENSYNC)
mutex_unlock(&state->sync_mutex);
break;
@@ -2756,11 +2753,11 @@ vchiq_close_service_internal(struct vchiq_service *service, int close_recvd)
break;
if (!do_abort_bulks(service)) {
- status = VCHIQ_RETRY;
+ status = -EINTR;
break;
}
- if (status == VCHIQ_SUCCESS)
+ if (!status)
status = close_service_complete(service, VCHIQ_SRVSTATE_CLOSERECVD);
break;
@@ -2824,7 +2821,7 @@ vchiq_free_service_internal(struct vchiq_service *service)
vchiq_service_put(service);
}
-enum vchiq_status
+int
vchiq_connect_internal(struct vchiq_state *state, struct vchiq_instance *instance)
{
struct vchiq_service *service;
@@ -2840,21 +2837,21 @@ vchiq_connect_internal(struct vchiq_state *state, struct vchiq_instance *instanc
if (state->conn_state == VCHIQ_CONNSTATE_DISCONNECTED) {
if (queue_message(state, NULL, MAKE_CONNECT, NULL, NULL, 0,
- QMFLAGS_IS_BLOCKING) == VCHIQ_RETRY)
- return VCHIQ_RETRY;
+ QMFLAGS_IS_BLOCKING) == -EINTR)
+ return -EINTR;
vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTING);
}
if (state->conn_state == VCHIQ_CONNSTATE_CONNECTING) {
if (wait_for_completion_interruptible(&state->connect))
- return VCHIQ_RETRY;
+ return -EINTR;
vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTED);
complete(&state->connect);
}
- return VCHIQ_SUCCESS;
+ return 0;
}
void
@@ -2871,15 +2868,15 @@ vchiq_shutdown_internal(struct vchiq_state *state, struct vchiq_instance *instan
}
}
-enum vchiq_status
+int
vchiq_close_service(unsigned int handle)
{
/* Unregister the service */
struct vchiq_service *service = find_service_by_handle(handle);
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
if (!service)
- return VCHIQ_ERROR;
+ return -EINVAL;
vchiq_log_info(vchiq_core_log_level, "%d: close_service:%d",
service->state->id, service->localport);
@@ -2888,14 +2885,14 @@ vchiq_close_service(unsigned int handle)
(service->srvstate == VCHIQ_SRVSTATE_LISTENING) ||
(service->srvstate == VCHIQ_SRVSTATE_HIDDEN)) {
vchiq_service_put(service);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
mark_service_closing(service);
if (current == service->state->slot_handler_thread) {
status = vchiq_close_service_internal(service, NO_CLOSE_RECVD);
- WARN_ON(status == VCHIQ_RETRY);
+ WARN_ON(status == -EINTR);
} else {
/* Mark the service for termination by the slot handler */
request_poll(service->state, service, VCHIQ_POLL_TERMINATE);
@@ -2903,7 +2900,7 @@ vchiq_close_service(unsigned int handle)
while (1) {
if (wait_for_completion_interruptible(&service->remove_event)) {
- status = VCHIQ_RETRY;
+ status = -EINTR;
break;
}
@@ -2918,10 +2915,10 @@ vchiq_close_service(unsigned int handle)
srvstate_names[service->srvstate]);
}
- if ((status == VCHIQ_SUCCESS) &&
+ if ((!status) &&
(service->srvstate != VCHIQ_SRVSTATE_FREE) &&
(service->srvstate != VCHIQ_SRVSTATE_LISTENING))
- status = VCHIQ_ERROR;
+ status = -EINVAL;
vchiq_service_put(service);
@@ -2929,22 +2926,22 @@ vchiq_close_service(unsigned int handle)
}
EXPORT_SYMBOL(vchiq_close_service);
-enum vchiq_status
+int
vchiq_remove_service(unsigned int handle)
{
/* Unregister the service */
struct vchiq_service *service = find_service_by_handle(handle);
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
if (!service)
- return VCHIQ_ERROR;
+ return -EINVAL;
vchiq_log_info(vchiq_core_log_level, "%d: remove_service:%d",
service->state->id, service->localport);
if (service->srvstate == VCHIQ_SRVSTATE_FREE) {
vchiq_service_put(service);
- return VCHIQ_ERROR;
+ return -EINVAL;
}
mark_service_closing(service);
@@ -2958,14 +2955,14 @@ vchiq_remove_service(unsigned int handle)
service->public_fourcc = VCHIQ_FOURCC_INVALID;
status = vchiq_close_service_internal(service, NO_CLOSE_RECVD);
- WARN_ON(status == VCHIQ_RETRY);
+ WARN_ON(status == -EINTR);
} else {
/* Mark the service for removal by the slot handler */
request_poll(service->state, service, VCHIQ_POLL_REMOVE);
}
while (1) {
if (wait_for_completion_interruptible(&service->remove_event)) {
- status = VCHIQ_RETRY;
+ status = -EINTR;
break;
}
@@ -2979,26 +2976,25 @@ vchiq_remove_service(unsigned int handle)
srvstate_names[service->srvstate]);
}
- if ((status == VCHIQ_SUCCESS) &&
+ if ((!status) &&
(service->srvstate != VCHIQ_SRVSTATE_FREE))
- status = VCHIQ_ERROR;
+ status = -EINVAL;
vchiq_service_put(service);
-
return status;
}
/*
* This function may be called by kernel threads or user threads.
- * User threads may receive VCHIQ_RETRY to indicate that a signal has been
+ * User threads may receive -EINTR to indicate that a signal has been
* received and the call should be retried after being returned to user
* context.
* When called in blocking mode, the userdata field points to a bulk_waiter
* structure.
*/
-enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __user *uoffset,
- int size, void *userdata, enum vchiq_bulk_mode mode,
- enum vchiq_bulk_dir dir)
+int vchiq_bulk_transfer(unsigned int handle, void *offset, void __user *uoffset,
+ int size, void *userdata, enum vchiq_bulk_mode mode,
+ enum vchiq_bulk_dir dir)
{
struct vchiq_service *service = find_service_by_handle(handle);
struct vchiq_bulk_queue *queue;
@@ -3008,7 +3004,7 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __
const char dir_char = (dir == VCHIQ_BULK_TRANSMIT) ? 't' : 'r';
const int dir_msgtype = (dir == VCHIQ_BULK_TRANSMIT) ?
VCHIQ_MSG_BULK_TX : VCHIQ_MSG_BULK_RX;
- enum vchiq_status status = VCHIQ_ERROR;
+ int status = -EINVAL;
int payload[2];
if (!service)
@@ -3020,7 +3016,7 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __
if (!offset && !uoffset)
goto error_exit;
- if (vchiq_check_service(service) != VCHIQ_SUCCESS)
+ if (vchiq_check_service(service))
goto error_exit;
switch (mode) {
@@ -3047,7 +3043,7 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __
&service->bulk_tx : &service->bulk_rx;
if (mutex_lock_killable(&service->bulk_mutex)) {
- status = VCHIQ_RETRY;
+ status = -EINTR;
goto error_exit;
}
@@ -3056,11 +3052,11 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __
do {
mutex_unlock(&service->bulk_mutex);
if (wait_for_completion_interruptible(&service->bulk_remove_event)) {
- status = VCHIQ_RETRY;
+ status = -EINTR;
goto error_exit;
}
if (mutex_lock_killable(&service->bulk_mutex)) {
- status = VCHIQ_RETRY;
+ status = -EINTR;
goto error_exit;
}
} while (queue->local_insert == queue->remove +
@@ -3089,7 +3085,7 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __
* claim it here to ensure that isn't happening
*/
if (mutex_lock_killable(&state->slot_mutex)) {
- status = VCHIQ_RETRY;
+ status = -EINTR;
goto cancel_bulk_error_exit;
}
@@ -3109,7 +3105,7 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __
QMFLAGS_IS_BLOCKING |
QMFLAGS_NO_MUTEX_LOCK |
QMFLAGS_NO_MUTEX_UNLOCK);
- if (status != VCHIQ_SUCCESS)
+ if (status)
goto unlock_both_error_exit;
queue->local_insert++;
@@ -3124,14 +3120,14 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __
waiting:
vchiq_service_put(service);
- status = VCHIQ_SUCCESS;
+ status = 0;
if (bulk_waiter) {
bulk_waiter->bulk = bulk;
if (wait_for_completion_interruptible(&bulk_waiter->event))
- status = VCHIQ_RETRY;
+ status = -EINTR;
else if (bulk_waiter->actual == VCHIQ_BULK_ACTUAL_ABORTED)
- status = VCHIQ_ERROR;
+ status = -EINVAL;
}
return status;
@@ -3149,7 +3145,7 @@ enum vchiq_status vchiq_bulk_transfer(unsigned int handle, void *offset, void __
return status;
}
-enum vchiq_status
+int
vchiq_queue_message(unsigned int handle,
ssize_t (*copy_callback)(void *context, void *dest,
size_t offset, size_t maxsize),
@@ -3157,13 +3153,13 @@ vchiq_queue_message(unsigned int handle,
size_t size)
{
struct vchiq_service *service = find_service_by_handle(handle);
- enum vchiq_status status = VCHIQ_ERROR;
+ int status = -EINVAL;
int data_id;
if (!service)
goto error_exit;
- if (vchiq_check_service(service) != VCHIQ_SUCCESS)
+ if (vchiq_check_service(service))
goto error_exit;
if (!size) {
@@ -3188,7 +3184,7 @@ vchiq_queue_message(unsigned int handle,
copy_callback, context, size, 1);
break;
default:
- status = VCHIQ_ERROR;
+ status = -EINVAL;
break;
}
@@ -3201,18 +3197,18 @@ vchiq_queue_message(unsigned int handle,
int vchiq_queue_kernel_message(unsigned int handle, void *data, unsigned int size)
{
- enum vchiq_status status;
+ int status;
while (1) {
status = vchiq_queue_message(handle, memcpy_copy_callback,
data, size);
/*
- * vchiq_queue_message() may return VCHIQ_RETRY, so we need to
+ * vchiq_queue_message() may be interrupted, so we need to
* implement a retry mechanism since this function is supposed
* to block until queued
*/
- if (status != VCHIQ_RETRY)
+ if (status != -EINTR)
break;
msleep(1);
@@ -3264,27 +3260,25 @@ release_message_sync(struct vchiq_state *state, struct vchiq_header *header)
remote_event_signal(&state->remote->sync_release);
}
-enum vchiq_status
+int
vchiq_get_peer_version(unsigned int handle, short *peer_version)
{
- enum vchiq_status status = VCHIQ_ERROR;
+ int status = -EINVAL;
struct vchiq_service *service = find_service_by_handle(handle);
if (!service)
goto exit;
- if (vchiq_check_service(service) != VCHIQ_SUCCESS)
+ if (vchiq_check_service(service))
goto exit;
if (!peer_version)
goto exit;
*peer_version = service->peer_version;
- status = VCHIQ_SUCCESS;
+ status = 0;
exit:
- if (service)
- vchiq_service_put(service);
return status;
}
EXPORT_SYMBOL(vchiq_get_peer_version);
@@ -3626,18 +3620,18 @@ vchiq_loud_error_footer(void)
"============================================================================");
}
-enum vchiq_status vchiq_send_remote_use(struct vchiq_state *state)
+int vchiq_send_remote_use(struct vchiq_state *state)
{
if (state->conn_state == VCHIQ_CONNSTATE_DISCONNECTED)
- return VCHIQ_RETRY;
+ return -EINVAL;
return queue_message(state, NULL, MAKE_REMOTE_USE, NULL, NULL, 0, 0);
}
-enum vchiq_status vchiq_send_remote_use_active(struct vchiq_state *state)
+int vchiq_send_remote_use_active(struct vchiq_state *state)
{
if (state->conn_state == VCHIQ_CONNSTATE_DISCONNECTED)
- return VCHIQ_RETRY;
+ return -EINVAL;
return queue_message(state, NULL, MAKE_REMOTE_USE_ACTIVE,
NULL, NULL, 0, 0);
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 1ddc661642a9..4ae72f064fff 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
@@ -459,7 +459,7 @@ vchiq_init_slots(void *mem_base, int mem_size);
extern int
vchiq_init_state(struct vchiq_state *state, struct vchiq_slot_zero *slot_zero);
-extern enum vchiq_status
+extern int
vchiq_connect_internal(struct vchiq_state *state, struct vchiq_instance *instance);
struct vchiq_service *
@@ -468,10 +468,10 @@ vchiq_add_service_internal(struct vchiq_state *state,
int srvstate, struct vchiq_instance *instance,
void (*userdata_term)(void *userdata));
-extern enum vchiq_status
+extern int
vchiq_open_service_internal(struct vchiq_service *service, int client_id);
-extern enum vchiq_status
+extern int
vchiq_close_service_internal(struct vchiq_service *service, int close_recvd);
extern void
@@ -486,7 +486,7 @@ vchiq_shutdown_internal(struct vchiq_state *state, struct vchiq_instance *instan
extern void
remote_event_pollall(struct vchiq_state *state);
-extern enum vchiq_status
+extern int
vchiq_bulk_transfer(unsigned int handle, void *offset, void __user *uoffset,
int size, void *userdata, enum vchiq_bulk_mode mode,
enum vchiq_bulk_dir dir);
@@ -547,7 +547,7 @@ vchiq_service_get(struct vchiq_service *service);
extern void
vchiq_service_put(struct vchiq_service *service);
-extern enum vchiq_status
+extern int
vchiq_queue_message(unsigned int handle,
ssize_t (*copy_callback)(void *context, void *dest,
size_t offset, size_t maxsize),
@@ -579,13 +579,13 @@ void vchiq_on_remote_release(struct vchiq_state *state);
int vchiq_platform_init_state(struct vchiq_state *state);
-enum vchiq_status vchiq_check_service(struct vchiq_service *service);
+int vchiq_check_service(struct vchiq_service *service);
void vchiq_on_remote_use_active(struct vchiq_state *state);
-enum vchiq_status vchiq_send_remote_use(struct vchiq_state *state);
+int vchiq_send_remote_use(struct vchiq_state *state);
-enum vchiq_status vchiq_send_remote_use_active(struct vchiq_state *state);
+int vchiq_send_remote_use_active(struct vchiq_state *state);
void vchiq_platform_conn_state_changed(struct vchiq_state *state,
enum vchiq_connstate oldstate,
@@ -595,7 +595,7 @@ void vchiq_set_conn_state(struct vchiq_state *state, enum vchiq_connstate newsta
void vchiq_log_dump_mem(const char *label, u32 addr, const void *void_mem, size_t num_bytes);
-enum vchiq_status vchiq_remove_service(unsigned int service);
+int vchiq_remove_service(unsigned int service);
int vchiq_get_client_id(unsigned int service);
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 66bbfec332ba..062604a95b79 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
@@ -112,7 +112,7 @@ vchiq_ioc_queue_message(unsigned int handle, struct vchiq_element *elements,
unsigned long count)
{
struct vchiq_io_copy_callback_context context;
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
unsigned long i;
size_t total_size = 0;
@@ -130,11 +130,7 @@ vchiq_ioc_queue_message(unsigned int handle, struct vchiq_element *elements,
status = vchiq_queue_message(handle, vchiq_ioc_copy_element_data,
&context, total_size);
- if (status == VCHIQ_ERROR)
- return -EIO;
- else if (status == VCHIQ_RETRY)
- return -EINTR;
- return 0;
+ return (status == -EINVAL) ? -EIO : status;
}
static int vchiq_ioc_create_service(struct vchiq_instance *instance,
@@ -142,7 +138,7 @@ static int vchiq_ioc_create_service(struct vchiq_instance *instance,
{
struct user_service *user_service = NULL;
struct vchiq_service *service;
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
struct vchiq_service_params_kernel params;
int srvstate;
@@ -190,9 +186,9 @@ static int vchiq_ioc_create_service(struct vchiq_instance *instance,
if (args->is_open) {
status = vchiq_open_service_internal(service, instance->pid);
- if (status != VCHIQ_SUCCESS) {
+ if (status) {
vchiq_remove_service(service->handle);
- return (status == VCHIQ_RETRY) ?
+ return (status == -EINTR) ?
-EINTR : -EIO;
}
}
@@ -338,7 +334,7 @@ static int vchiq_irq_queue_bulk_tx_rx(struct vchiq_instance *instance,
goto out;
}
- if ((status != VCHIQ_RETRY) || fatal_signal_pending(current) ||
+ if ((status != -EINTR) || fatal_signal_pending(current) ||
!waiter->bulk_waiter.bulk) {
if (waiter->bulk_waiter.bulk) {
/* Cancel the signal when the transfer completes. */
@@ -364,9 +360,9 @@ static int vchiq_irq_queue_bulk_tx_rx(struct vchiq_instance *instance,
vchiq_service_put(service);
if (ret)
return ret;
- else if (status == VCHIQ_ERROR)
+ else if (status == -EINVAL)
return -EIO;
- else if (status == VCHIQ_RETRY)
+ else if (status == -EINTR)
return -EINTR;
return 0;
}
@@ -577,7 +573,7 @@ static long
vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct vchiq_instance *instance = file->private_data;
- enum vchiq_status status = VCHIQ_SUCCESS;
+ int status = 0;
struct vchiq_service *service = NULL;
long ret = 0;
int i, rc;
@@ -598,12 +594,12 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
instance, &i))) {
status = vchiq_remove_service(service->handle);
vchiq_service_put(service);
- if (status != VCHIQ_SUCCESS)
+ if (status)
break;
}
service = NULL;
- if (status == VCHIQ_SUCCESS) {
+ if (!status) {
/* Wake the completion thread and ask it to exit */
instance->closing = 1;
complete(&instance->insert_event);
@@ -627,7 +623,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
status = vchiq_connect_internal(instance->state, instance);
mutex_unlock(&instance->state->mutex);
- if (status == VCHIQ_SUCCESS)
+ if (!status)
instance->connected = 1;
else
vchiq_log_error(vchiq_arm_log_level,
@@ -675,7 +671,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
status = (cmd == VCHIQ_IOC_CLOSE_SERVICE) ?
vchiq_close_service(service->handle) :
vchiq_remove_service(service->handle);
- if (status != VCHIQ_SUCCESS)
+ if (status)
break;
}
@@ -686,7 +682,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
*/
if (user_service->close_pending &&
wait_for_completion_interruptible(&user_service->close_event))
- status = VCHIQ_RETRY;
+ status = -EINTR;
break;
}
@@ -862,13 +858,13 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
vchiq_service_put(service);
if (ret == 0) {
- if (status == VCHIQ_ERROR)
+ if (status == -EINVAL)
ret = -EIO;
- else if (status == VCHIQ_RETRY)
+ else if (status == -EINTR)
ret = -EINTR;
}
- if ((status == VCHIQ_SUCCESS) && (ret < 0) && (ret != -EINTR) && (ret != -EWOULDBLOCK))
+ if ((!status) && (ret < 0) && (ret != -EINTR) && (ret != -EWOULDBLOCK))
vchiq_log_info(vchiq_arm_log_level,
" ioctl instance %pK, cmd %s -> status %d, %ld",
instance, (_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ?
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
index 86d77f2eeea5..96f50beace44 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
@@ -12,10 +12,10 @@
struct vchiq_service_params {
int fourcc;
- enum vchiq_status __user (*callback)(enum vchiq_reason reason,
- struct vchiq_header *header,
- unsigned int handle,
- void *bulk_userdata);
+ int __user (*callback)(enum vchiq_reason reason,
+ struct vchiq_header *header,
+ unsigned int handle,
+ void *bulk_userdata);
void __user *userdata;
short version; /* Increment for non-trivial changes */
short version_min; /* Update for incompatible changes */
--
2.36.1
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