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greybus: operation: add incoming-operation flag 

Add flag field to struct gb_operation, and a first flag
GB_OPERATION_FLAG_INCOMING to identify incoming operations.

Pass an initial set of flags when allocating new operations, and use
these to identify incoming operations rather than overloading the
meaning of GB_OPERATION_TYPE_INVALID. This also allows us to set the
type for all operations during allocation.

Also add convenience helper to identify incoming operations.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2015-07-01 12:37:26 +02:00 committed by Greg Kroah-Hartman
parent 73f9d73f12
commit 710067e2ef
2 changed files with 19 additions and 9 deletions
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17
drivers/staging/greybus/operation.c
View File

@ -413,7 +413,7 @@ EXPORT_SYMBOL_GPL(gb_operation_response_alloc);
static struct gb_operation *
gb_operation_create_common(struct gb_connection *connection, u8 type,
size_t request_size, size_t response_size,
gfp_t gfp_flags)
unsigned long op_flags, gfp_t gfp_flags)
{
struct greybus_host_device *hd = connection->hd;
struct gb_operation *operation;
@ -431,11 +431,13 @@ gb_operation_create_common(struct gb_connection *connection, u8 type,
operation->request->operation = operation;
/* Allocate the response buffer for outgoing operations */
if (type != GB_OPERATION_TYPE_INVALID) {
if (!(op_flags & GB_OPERATION_FLAG_INCOMING)) {
if (!gb_operation_response_alloc(operation, response_size))
goto err_request;
operation->type = type;
}
operation->flags = op_flags;
operation->type = type;
operation->errno = -EBADR; /* Initial value--means "never set" */
INIT_WORK(&operation->work, gb_operation_work);
@ -475,7 +477,7 @@ struct gb_operation *gb_operation_create(struct gb_connection *connection,
type &= ~GB_MESSAGE_TYPE_RESPONSE;
return gb_operation_create_common(connection, type,
request_size, response_size, gfp);
request_size, response_size, 0, gfp);
}
EXPORT_SYMBOL_GPL(gb_operation_create);
@ -493,16 +495,15 @@ gb_operation_create_incoming(struct gb_connection *connection, u16 id,
{
struct gb_operation *operation;
size_t request_size;
unsigned long flags = GB_OPERATION_FLAG_INCOMING;
/* Caller has made sure we at least have a message header. */
request_size = size - sizeof(struct gb_operation_msg_hdr);
operation = gb_operation_create_common(connection,
GB_OPERATION_TYPE_INVALID,
request_size, 0, GFP_ATOMIC);
operation = gb_operation_create_common(connection, type,
request_size, 0, flags, GFP_ATOMIC);
if (operation) {
operation->id = id;
operation->type = type;
memcpy(operation->request->header, data, size);
}

11
drivers/staging/greybus/operation.h
View File

@ -89,6 +89,8 @@ struct gb_message {
void *hcpriv;
};
#define GB_OPERATION_FLAG_INCOMING BIT(0)
/*
* A Greybus operation is a remote procedure call performed over a
* connection between two UniPro interfaces.
@ -113,8 +115,9 @@ struct gb_operation {
struct gb_connection *connection;
struct gb_message *request;
struct gb_message *response;
u8 type;
unsigned long flags;
u8 type;
u16 id;
int errno; /* Operation result */
@ -126,6 +129,12 @@ struct gb_operation {
struct list_head links; /* connection->operations */
};
static inline bool
gb_operation_is_incoming(struct gb_operation *operation)
{
return operation->flags & GB_OPERATION_FLAG_INCOMING;
}
void gb_connection_recv(struct gb_connection *connection,
void *data, size_t size);