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-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c5
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c35
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c104
-rw-r--r--drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h12
4 files changed, 104 insertions, 52 deletions
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
index e568e9e6eb95..ca30bfd52919 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
@@ -247,15 +247,14 @@ vchiq_complete_bulk(struct vchiq_bulk *bulk)
bulk->actual);
}
-void
-vchiq_dump_platform_state(void *dump_context)
+int vchiq_dump_platform_state(void *dump_context)
{
char buf[80];
int len;
len = snprintf(buf, sizeof(buf),
" Platform: 2835 (VC master)");
- vchiq_dump(dump_context, buf, len + 1);
+ return vchiq_dump(dump_context, buf, len + 1);
}
enum vchiq_status
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 8f9cfa083264..02148a24818a 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -2072,14 +2072,13 @@ out:
*
***************************************************************************/
-void
-vchiq_dump(void *dump_context, const char *str, int len)
+int vchiq_dump(void *dump_context, const char *str, int len)
{
struct dump_context *context = (struct dump_context *)dump_context;
int copy_bytes;
if (context->actual >= context->space)
- return;
+ return 0;
if (context->offset > 0) {
int skip_bytes = min_t(int, len, context->offset);
@@ -2088,14 +2087,14 @@ vchiq_dump(void *dump_context, const char *str, int len)
len -= skip_bytes;
context->offset -= skip_bytes;
if (context->offset > 0)
- return;
+ return 0;
}
copy_bytes = min_t(int, len, context->space - context->actual);
if (copy_bytes == 0)
- return;
+ return 0;
if (copy_to_user(context->buf + context->actual, str,
copy_bytes))
- context->actual = -EFAULT;
+ return -EFAULT;
context->actual += copy_bytes;
len -= copy_bytes;
@@ -2109,8 +2108,9 @@ vchiq_dump(void *dump_context, const char *str, int len)
if (copy_to_user(context->buf + context->actual - 1,
&cr, 1))
- context->actual = -EFAULT;
+ return -EFAULT;
}
+ return 0;
}
/****************************************************************************
@@ -2119,8 +2119,7 @@ vchiq_dump(void *dump_context, const char *str, int len)
*
***************************************************************************/
-void
-vchiq_dump_platform_instances(void *dump_context)
+int vchiq_dump_platform_instances(void *dump_context)
{
struct vchiq_state *state = vchiq_get_state();
char buf[80];
@@ -2145,6 +2144,7 @@ vchiq_dump_platform_instances(void *dump_context)
for (i = 0; i < state->unused_service; i++) {
struct vchiq_service *service = state->services[i];
struct vchiq_instance *instance;
+ int err;
if (!service || service->base.callback != service_callback)
continue;
@@ -2162,9 +2162,12 @@ vchiq_dump_platform_instances(void *dump_context)
instance->completion_remove,
MAX_COMPLETIONS);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
instance->mark = 1;
}
+ return 0;
}
/****************************************************************************
@@ -2173,9 +2176,8 @@ vchiq_dump_platform_instances(void *dump_context)
*
***************************************************************************/
-void
-vchiq_dump_platform_service_state(void *dump_context,
- struct vchiq_service *service)
+int vchiq_dump_platform_service_state(void *dump_context,
+ struct vchiq_service *service)
{
struct user_service *user_service =
(struct user_service *)service->base.userdata;
@@ -2196,7 +2198,7 @@ vchiq_dump_platform_service_state(void *dump_context,
" (dequeue pending)");
}
- vchiq_dump(dump_context, buf, len + 1);
+ return vchiq_dump(dump_context, buf, len + 1);
}
/****************************************************************************
@@ -2210,13 +2212,16 @@ vchiq_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct dump_context context;
+ int err;
context.buf = buf;
context.actual = 0;
context.space = count;
context.offset = *ppos;
- vchiq_dump_state(&context, &g_state);
+ err = vchiq_dump_state(&context, &g_state);
+ if (err)
+ return err;
*ppos += context.actual;
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 b9d94f6b9bef..76351078affb 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
@@ -3298,7 +3298,7 @@ vchiq_set_service_option(unsigned int handle,
return status;
}
-static void
+static int
vchiq_dump_shared_state(void *dump_context, struct vchiq_state *state,
struct vchiq_shared_state *shared, const char *label)
{
@@ -3318,16 +3318,21 @@ vchiq_dump_shared_state(void *dump_context, struct vchiq_state *state,
int i;
char buf[80];
int len;
+ int err;
len = scnprintf(buf, sizeof(buf),
" %s: slots %d-%d tx_pos=%x recycle=%x",
label, shared->slot_first, shared->slot_last,
shared->tx_pos, shared->slot_queue_recycle);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
len = scnprintf(buf, sizeof(buf),
" Slots claimed:");
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
for (i = shared->slot_first; i <= shared->slot_last; i++) {
struct vchiq_slot_info slot_info =
@@ -3336,27 +3341,34 @@ vchiq_dump_shared_state(void *dump_context, struct vchiq_state *state,
len = scnprintf(buf, sizeof(buf),
" %d: %d/%d", i, slot_info.use_count,
slot_info.release_count);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
}
}
for (i = 1; i < shared->debug[DEBUG_ENTRIES]; i++) {
len = scnprintf(buf, sizeof(buf), " DEBUG: %s = %d(%x)",
debug_names[i], shared->debug[i], shared->debug[i]);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
}
+ return 0;
}
-void
-vchiq_dump_state(void *dump_context, struct vchiq_state *state)
+int vchiq_dump_state(void *dump_context, struct vchiq_state *state)
{
char buf[80];
int len;
int i;
+ int err;
len = scnprintf(buf, sizeof(buf), "State %d: %s", state->id,
conn_state_names[state->conn_state]);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
len = scnprintf(buf, sizeof(buf),
" tx_pos=%x(@%pK), rx_pos=%x(@%pK)",
@@ -3364,12 +3376,16 @@ vchiq_dump_state(void *dump_context, struct vchiq_state *state)
state->tx_data + (state->local_tx_pos & VCHIQ_SLOT_MASK),
state->rx_pos,
state->rx_data + (state->rx_pos & VCHIQ_SLOT_MASK));
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
len = scnprintf(buf, sizeof(buf),
" Version: %d (min %d)",
VCHIQ_VERSION, VCHIQ_VERSION_MIN);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
if (VCHIQ_ENABLE_STATS) {
len = scnprintf(buf, sizeof(buf),
@@ -3377,7 +3393,9 @@ vchiq_dump_state(void *dump_context, struct vchiq_state *state)
"error_count=%d",
state->stats.ctrl_tx_count, state->stats.ctrl_rx_count,
state->stats.error_count);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
}
len = scnprintf(buf, sizeof(buf),
@@ -3388,30 +3406,49 @@ vchiq_dump_state(void *dump_context, struct vchiq_state *state)
state->data_quota - state->data_use_count,
state->local->slot_queue_recycle - state->slot_queue_available,
state->stats.slot_stalls, state->stats.data_stalls);
- vchiq_dump(dump_context, buf, len + 1);
-
- vchiq_dump_platform_state(dump_context);
-
- vchiq_dump_shared_state(dump_context, state, state->local, "Local");
- vchiq_dump_shared_state(dump_context, state, state->remote, "Remote");
-
- vchiq_dump_platform_instances(dump_context);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
+
+ err = vchiq_dump_platform_state(dump_context);
+ if (err)
+ return err;
+
+ err = vchiq_dump_shared_state(dump_context,
+ state,
+ state->local,
+ "Local");
+ if (err)
+ return err;
+ err = vchiq_dump_shared_state(dump_context,
+ state,
+ state->remote,
+ "Remote");
+ if (err)
+ return err;
+
+ err = vchiq_dump_platform_instances(dump_context);
+ if (err)
+ return err;
for (i = 0; i < state->unused_service; i++) {
struct vchiq_service *service = find_service_by_port(state, i);
if (service) {
- vchiq_dump_service_state(dump_context, service);
+ err = vchiq_dump_service_state(dump_context, service);
unlock_service(service);
+ if (err)
+ return err;
}
}
+ return 0;
}
-void
-vchiq_dump_service_state(void *dump_context, struct vchiq_service *service)
+int vchiq_dump_service_state(void *dump_context, struct vchiq_service *service)
{
char buf[80];
int len;
+ int err;
len = scnprintf(buf, sizeof(buf), "Service %u: %s (ref %u)",
service->localport, srvstate_names[service->srvstate],
@@ -3444,7 +3481,9 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service)
service_quota->slot_use_count,
service_quota->slot_quota);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
tx_pending = service->bulk_tx.local_insert -
service->bulk_tx.remote_insert;
@@ -3463,7 +3502,9 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service)
BULK_INDEX(service->bulk_rx.remove)].size : 0);
if (VCHIQ_ENABLE_STATS) {
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
len = scnprintf(buf, sizeof(buf),
" Ctrl: tx_count=%d, tx_bytes=%llu, "
@@ -3472,7 +3513,9 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service)
service->stats.ctrl_tx_bytes,
service->stats.ctrl_rx_count,
service->stats.ctrl_rx_bytes);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
len = scnprintf(buf, sizeof(buf),
" Bulk: tx_count=%d, tx_bytes=%llu, "
@@ -3481,7 +3524,9 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service)
service->stats.bulk_tx_bytes,
service->stats.bulk_rx_count,
service->stats.bulk_rx_bytes);
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
len = scnprintf(buf, sizeof(buf),
" %d quota stalls, %d slot stalls, "
@@ -3494,10 +3539,13 @@ vchiq_dump_service_state(void *dump_context, struct vchiq_service *service)
}
}
- vchiq_dump(dump_context, buf, len + 1);
+ err = vchiq_dump(dump_context, buf, len + 1);
+ if (err)
+ return err;
if (service->srvstate != VCHIQ_SRVSTATE_FREE)
- vchiq_dump_platform_service_state(dump_context, service);
+ err = vchiq_dump_platform_service_state(dump_context, service);
+ return err;
}
void
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 419bcdd165b4..c31f953a9986 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
@@ -526,10 +526,10 @@ vchiq_bulk_transfer(unsigned int handle, void *offset, int size,
void *userdata, enum vchiq_bulk_mode mode,
enum vchiq_bulk_dir dir);
-extern void
+extern int
vchiq_dump_state(void *dump_context, struct vchiq_state *state);
-extern void
+extern int
vchiq_dump_service_state(void *dump_context, struct vchiq_service *service);
extern void
@@ -602,16 +602,16 @@ vchiq_platform_resume(struct vchiq_state *state);
extern void
vchiq_platform_resumed(struct vchiq_state *state);
-extern void
+extern int
vchiq_dump(void *dump_context, const char *str, int len);
-extern void
+extern int
vchiq_dump_platform_state(void *dump_context);
-extern void
+extern int
vchiq_dump_platform_instances(void *dump_context);
-extern void
+extern int
vchiq_dump_platform_service_state(void *dump_context,
struct vchiq_service *service);