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greybus: get rid of functions now...
We decided yesterday that we would no longer support the notion of a "function." Instead, a connection will simply exist between the AP and an interface on a module (and a CPort Id on each end). What was previously considered the "function type" will now be handled as the "protocol" associated with the connection. Update gb_connection_create() to take just the interface and a cport id associated with that interface. Right now every module points back to a host device, so for now we'll establish the connection back to that. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
This commit is contained in:
Alex Elder
Greg Kroah-Hartman
parent
9e8a6860f5
commit
cd345074bb
@ -6,7 +6,6 @@ greybus-y := core.o \
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manifest.o \
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module.o \
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interface.o \
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function.o \
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connection.o \
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operation.o \
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i2c-gb.o \
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@ -22,23 +22,25 @@
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* Returns a pointer to the new connection if successful, or a null
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* pointer otherwise.
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*/
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struct gb_connection *gb_connection_create(struct greybus_host_device *hd,
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struct gb_function *function)
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struct gb_connection *gb_connection_create(struct gb_interface *interface,
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u16 cport_id)
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{
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struct gb_connection *connection;
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struct greybus_host_device *hd;
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connection = kzalloc(sizeof(*connection), GFP_KERNEL);
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if (!connection)
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return NULL;
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connection->cport_id = greybus_hd_cport_id_alloc(hd);
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if (connection->cport_id == CPORT_ID_BAD) {
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hd = interface->gmod->hd;
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connection->hd_cport_id = greybus_hd_cport_id_alloc(hd);
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if (connection->hd_cport_id == CPORT_ID_BAD) {
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kfree(connection);
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return NULL;
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}
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connection->hd = hd; /* XXX refcount? */
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connection->function = function; /* XXX refcount? */
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connection->interface = interface; /* XXX refcount? */
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connection->interface_cport_id = cport_id;
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INIT_LIST_HEAD(&connection->operations);
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atomic_set(&connection->op_cycle, 0);
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@ -56,9 +58,9 @@ void gb_connection_destroy(struct gb_connection *connection)
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/* XXX Need to wait for any outstanding requests to complete */
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WARN_ON(!list_empty(&connection->operations));
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greybus_hd_cport_id_free(connection->hd, connection->cport_id);
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/* kref_put(function); */
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/* kref_put(hd); */
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greybus_hd_cport_id_free(connection->hd, connection->hd_cport_id);
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/* kref_put(connection->interface); */
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/* kref_put(connection->hd); */
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kfree(connection);
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}
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@ -14,18 +14,21 @@
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#include "greybus.h"
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struct gb_connection {
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struct gb_function *function;
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struct greybus_host_device *hd;
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u16 cport_id; /* Host side */
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struct gb_interface *interface;
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u16 hd_cport_id;
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u16 interface_cport_id;
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struct list_head host_links;
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struct list_head hd_links;
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struct list_head interface_links;
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/* protocol */
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struct list_head operations;
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atomic_t op_cycle;
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};
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struct gb_connection *gb_connection_create(struct greybus_host_device *hd,
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struct gb_function *function);
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struct gb_connection *gb_connection_create(struct gb_interface *interface,
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u16 cport_id);
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void gb_connection_destroy(struct gb_connection *connection);
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u16 gb_connection_op_id(struct gb_connection *connection);
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@ -1,57 +0,0 @@
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/*
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* Greybus functions
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*
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* Copyright 2014 Google Inc.
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*
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* Released under the GPLv2 only.
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*/
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#include "greybus.h"
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/* XXX This could be per-host device or per-module or per-interface */
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static DEFINE_SPINLOCK(gb_functions_lock);
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/*
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* A Greybus function generically defines an entity associated with
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* a CPort within a module. Each function has a type (e.g. i2c,
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* GPIO, etc.) that defines how it behaves and how the AP interacts
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* with it.
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*
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* Create a gb_function structure to represent a discovered
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* function. Returns a pointer to the new function or a null
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* pointer if a failure occurs due to memory exhaustion.
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*/
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struct gb_function *gb_function_create(struct gb_interface *interface,
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u16 cport_id)
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{
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struct gb_function *function;
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function = kzalloc(sizeof(*function), GFP_KERNEL);
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if (!function)
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return NULL;
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function->interface = interface; /* XXX refcount? */
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function->cport_id = cport_id;
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spin_lock_irq(&gb_functions_lock);
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list_add_tail(&function->links, &interface->functions);
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spin_unlock_irq(&gb_functions_lock);
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return function;
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}
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/*
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* Tear down a previously set up function.
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*/
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void gb_function_destroy(struct gb_function *function)
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{
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if (WARN_ON(!function))
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return;
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spin_lock_irq(&gb_functions_lock);
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list_del(&function->links);
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spin_unlock_irq(&gb_functions_lock);
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/* kref_put(gmod); */
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kfree(function);
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}
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@ -1,23 +0,0 @@
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/*
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* Greybus functions
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*
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* Copyright 2014 Google Inc.
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*
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* Released under the GPLv2 only.
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*/
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#ifndef __FUNCTION_H
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#define __FUNCTION_H
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struct gb_function {
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struct gb_interface *interface;
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u16 cport_id;
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struct list_head links; /* interface->functions */
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};
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struct gb_function *gb_function_create(struct gb_interface *interface,
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u16 cport_id);
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void gb_function_destroy(struct gb_function *function);
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#endif /* __FUNCTION_H */
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@ -24,7 +24,6 @@
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#include "manifest.h"
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#include "module.h"
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#include "interface.h"
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#include "function.h"
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#include "connection.h"
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#include "operation.h"
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@ -204,7 +204,7 @@ u32 gb_manifest_parse_cports(struct gb_interface *interface)
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/* Found one. Set up its function structure */
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protocol = (enum greybus_protocol)desc_cport->protocol;
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cport_id = le16_to_cpu(desc_cport->id);
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if (!gb_function_create(interface, cport_id))
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if (!gb_connection_create(interface, cport_id))
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return 0; /* Error */
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count++;
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@ -124,8 +124,8 @@ struct gb_operation *gb_operation_create(struct gb_connection *connection,
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/* Our buffer holds a header in addition to the requested payload */
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size += sizeof(*header);
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gbuf = greybus_alloc_gbuf(connection->function->interface->gmod,
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connection->cport_id,
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gbuf = greybus_alloc_gbuf(connection->interface->gmod,
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connection->hd_cport_id,
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gbuf_out_callback, size,
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GFP_KERNEL, operation);
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if (gbuf) {
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