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staging: unisys: visorbus: Remove notifier-related code from visorbus
When this functionality was first implemented, visorchipset and visorbus were separate drivers, which necessitated a registration mechanism for them to communicate. More-recently, visorchipset and visorbus were combined into a single driver, and now exist as separate source files within the same driver, known as 'visorbus'. This eliminated the need for a registration mechanism, but it has remained nevertheless until now. For the sake of simplification, this registration mechanism is now being removed. Signed-off-by: David Binder <david.binder@unisys.com> Signed-off-by: David Kershner <david.kershner@unisys.com> Reviewed-by: Tim Sell <timothy.sell@unisys.com> Acked-By: Neil Horman <nhorman@tuxdriver.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Binder
Greg Kroah-Hartman
parent
eafc6a94e9
commit
87241ab859
@ -119,32 +119,6 @@ struct bus_type visorbus_type = {
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static long long bus_count; /* number of bus instances */
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/* ever-increasing */
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static void chipset_bus_create(struct visor_device *bus_info);
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static void chipset_bus_destroy(struct visor_device *bus_info);
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static void chipset_device_create(struct visor_device *dev_info);
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static void chipset_device_destroy(struct visor_device *dev_info);
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static void chipset_device_pause(struct visor_device *dev_info);
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static void chipset_device_resume(struct visor_device *dev_info);
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/*
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* These functions are implemented herein, and are called by the chipset
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* driver to notify us about specific events.
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*/
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static struct visorchipset_busdev_notifiers chipset_notifiers = {
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.bus_create = chipset_bus_create,
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.bus_destroy = chipset_bus_destroy,
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.device_create = chipset_device_create,
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.device_destroy = chipset_device_destroy,
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.device_pause = chipset_device_pause,
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.device_resume = chipset_device_resume,
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};
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/*
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* These functions are implemented in the chipset driver, and we call them
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* herein when we want to acknowledge a specific event.
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*/
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static struct visorchipset_busdev_responders chipset_responders;
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/* filled in with info about parent chipset driver when we register with it */
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static struct ultra_vbus_deviceinfo chipset_driverinfo;
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/* filled in with info about this driver, wrt it servicing client busses */
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@ -1171,7 +1145,7 @@ remove_all_visor_devices(void)
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}
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}
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static void
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void
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chipset_bus_create(struct visor_device *dev)
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{
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int rc;
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@ -1188,19 +1162,17 @@ chipset_bus_create(struct visor_device *dev)
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POSTCODE_LINUX_3(CHIPSET_INIT_SUCCESS_PC, bus_no,
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POSTCODE_SEVERITY_INFO);
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if (chipset_responders.bus_create)
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(*chipset_responders.bus_create) (dev, rc);
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bus_create_response(dev, rc);
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}
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static void
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void
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chipset_bus_destroy(struct visor_device *dev)
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{
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remove_bus_instance(dev);
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if (chipset_responders.bus_destroy)
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(*chipset_responders.bus_destroy)(dev, 0);
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bus_destroy_response(dev, 0);
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}
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static void
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void
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chipset_device_create(struct visor_device *dev_info)
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{
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int rc;
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@ -1211,8 +1183,7 @@ chipset_device_create(struct visor_device *dev_info)
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POSTCODE_SEVERITY_INFO);
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rc = create_visor_device(dev_info);
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if (chipset_responders.device_create)
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chipset_responders.device_create(dev_info, rc);
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device_create_response(dev_info, rc);
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if (rc < 0)
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POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no,
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@ -1222,13 +1193,12 @@ chipset_device_create(struct visor_device *dev_info)
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POSTCODE_SEVERITY_INFO);
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}
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static void
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void
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chipset_device_destroy(struct visor_device *dev_info)
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{
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remove_visor_device(dev_info);
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if (chipset_responders.device_destroy)
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(*chipset_responders.device_destroy) (dev_info, 0);
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device_destroy_response(dev_info, 0);
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}
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/**
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@ -1247,14 +1217,8 @@ pause_state_change_complete(struct visor_device *dev, int status)
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return;
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dev->pausing = false;
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if (!chipset_responders.device_pause) /* this can never happen! */
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return;
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/* Notify the chipset driver that the pause is complete, which
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* will presumably want to send some sort of response to the
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* initiator.
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*/
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(*chipset_responders.device_pause) (dev, status);
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visorchipset_device_pause_response(dev, status);
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}
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/**
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@ -1273,15 +1237,13 @@ resume_state_change_complete(struct visor_device *dev, int status)
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return;
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dev->resuming = false;
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if (!chipset_responders.device_resume) /* this can never happen! */
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return;
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/*
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* Notify the chipset driver that the resume is complete,
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* which will presumably want to send some sort of response to
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* the initiator.
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*/
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(*chipset_responders.device_resume) (dev, status);
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device_resume_response(dev, status);
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}
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/**
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@ -1303,9 +1265,9 @@ initiate_chipset_device_pause_resume(struct visor_device *dev, bool is_pause)
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void (*notify_func)(struct visor_device *dev, int response) = NULL;
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if (is_pause)
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notify_func = chipset_responders.device_pause;
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notify_func = visorchipset_device_pause_response;
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else
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notify_func = chipset_responders.device_resume;
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notify_func = device_resume_response;
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if (!notify_func)
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return;
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@ -1369,7 +1331,7 @@ initiate_chipset_device_pause_resume(struct visor_device *dev, bool is_pause)
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* that device. Success/failure result is returned asynchronously
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* via a callback function; see pause_state_change_complete().
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*/
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static void
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void
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chipset_device_pause(struct visor_device *dev_info)
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{
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initiate_chipset_device_pause_resume(dev_info, true);
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@ -1383,7 +1345,7 @@ chipset_device_pause(struct visor_device *dev_info)
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* that device. Success/failure result is returned asynchronously
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* via a callback function; see resume_state_change_complete().
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*/
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static void
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void
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chipset_device_resume(struct visor_device *dev_info)
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{
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initiate_chipset_device_pause_resume(dev_info, false);
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@ -1405,12 +1367,9 @@ visorbus_init(void)
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goto error;
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}
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/* This enables us to receive notifications when devices appear for
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* which this service partition is to be a server for.
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*/
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visorchipset_register_busdev(&chipset_notifiers,
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&chipset_responders,
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&chipset_driverinfo);
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bus_device_info_init(&chipset_driverinfo,
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"chipset", "visorchipset",
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VERSION, NULL);
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return 0;
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@ -1424,7 +1383,6 @@ visorbus_exit(void)
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{
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struct list_head *listentry, *listtmp;
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visorchipset_register_busdev(NULL, NULL, NULL);
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remove_all_visor_devices();
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list_for_each_safe(listentry, listtmp, &list_all_bus_instances) {
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@ -23,44 +23,20 @@
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#include "vbusdeviceinfo.h"
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#include "vbushelper.h"
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/* These functions will be called from within visorchipset when certain
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* events happen. (The implementation of these functions is outside of
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* visorchipset.)
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*/
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struct visorchipset_busdev_notifiers {
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void (*bus_create)(struct visor_device *bus_info);
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void (*bus_destroy)(struct visor_device *bus_info);
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void (*device_create)(struct visor_device *bus_info);
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void (*device_destroy)(struct visor_device *bus_info);
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void (*device_pause)(struct visor_device *bus_info);
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void (*device_resume)(struct visor_device *bus_info);
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};
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void chipset_bus_create(struct visor_device *bus_info);
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void chipset_bus_destroy(struct visor_device *bus_info);
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void chipset_device_create(struct visor_device *dev_info);
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void chipset_device_destroy(struct visor_device *dev_info);
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void chipset_device_pause(struct visor_device *dev_info);
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void chipset_device_resume(struct visor_device *dev_info);
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/* These functions live inside visorchipset, and will be called to indicate
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* responses to specific events (by code outside of visorchipset).
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* For now, the value for each response is simply either:
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* 0 = it worked
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* -1 = it failed
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*/
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struct visorchipset_busdev_responders {
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void (*bus_create)(struct visor_device *p, int response);
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void (*bus_destroy)(struct visor_device *p, int response);
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void (*device_create)(struct visor_device *p, int response);
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void (*device_destroy)(struct visor_device *p, int response);
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void (*device_pause)(struct visor_device *p, int response);
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void (*device_resume)(struct visor_device *p, int response);
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};
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/** Register functions (in the bus driver) to get called by visorchipset
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* whenever a bus or device appears for which this guest is to be the
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* client for. visorchipset will fill in <responders>, to indicate
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* functions the bus driver should call to indicate message responses.
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*/
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void
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visorchipset_register_busdev(
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struct visorchipset_busdev_notifiers *notifiers,
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struct visorchipset_busdev_responders *responders,
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struct ultra_vbus_deviceinfo *driver_info);
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void bus_create_response(struct visor_device *p, int response);
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void bus_destroy_response(struct visor_device *p, int response);
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void device_create_response(struct visor_device *p, int response);
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void device_destroy_response(struct visor_device *p, int response);
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void device_resume_response(struct visor_device *p, int response);
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void visorchipset_device_pause_response(struct visor_device *p,
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int response);
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/* visorbus init and exit functions */
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int visorbus_init(void);
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@ -87,7 +87,6 @@ visorchipset_release(struct inode *inode, struct file *file)
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static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST;
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/* when we got our last controlvm message */
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static unsigned long most_recent_message_jiffies;
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static int visorbusregistered;
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struct parser_context {
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unsigned long allocbytes;
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@ -99,7 +98,6 @@ struct parser_context {
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};
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static struct delayed_work periodic_controlvm_work;
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static DEFINE_SEMAPHORE(notifier_lock);
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static struct cdev file_cdev;
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static struct visorchannel **file_controlvm_channel;
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@ -212,26 +210,6 @@ static LIST_HEAD(parahotplug_request_list);
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static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */
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static void parahotplug_process_list(void);
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static struct visorchipset_busdev_notifiers busdev_notifiers;
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static void bus_create_response(struct visor_device *p, int response);
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static void bus_destroy_response(struct visor_device *p, int response);
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static void device_create_response(struct visor_device *p, int response);
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static void device_destroy_response(struct visor_device *p, int response);
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static void device_resume_response(struct visor_device *p, int response);
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static void visorchipset_device_pause_response(struct visor_device *p,
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int response);
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static struct visorchipset_busdev_responders busdev_responders = {
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.bus_create = bus_create_response,
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.bus_destroy = bus_destroy_response,
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.device_create = device_create_response,
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.device_destroy = device_destroy_response,
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.device_pause = visorchipset_device_pause_response,
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.device_resume = device_resume_response,
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};
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/* info for /dev/visorchipset */
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static dev_t major_dev = -1; /*< indicates major num for device */
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@ -691,30 +669,6 @@ struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no,
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return vdev;
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}
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void
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visorchipset_register_busdev(
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struct visorchipset_busdev_notifiers *notifiers,
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struct visorchipset_busdev_responders *responders,
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struct ultra_vbus_deviceinfo *driver_info)
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{
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down(¬ifier_lock);
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if (!notifiers) {
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memset(&busdev_notifiers, 0,
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sizeof(busdev_notifiers));
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visorbusregistered = 0; /* clear flag */
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} else {
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busdev_notifiers = *notifiers;
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visorbusregistered = 1; /* set flag */
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}
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if (responders)
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*responders = busdev_responders;
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if (driver_info)
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bus_device_info_init(driver_info, "chipset", "visorchipset",
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VERSION, NULL);
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up(¬ifier_lock);
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}
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static void
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chipset_init(struct controlvm_message *inmsg)
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{
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@ -927,22 +881,20 @@ bus_epilog(struct visor_device *bus_info,
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{
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struct controlvm_message_header *pmsg_hdr = NULL;
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down(¬ifier_lock);
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if (!bus_info) {
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/*
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* relying on a valid passed in response code
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* be lazy and re-use msg_hdr for this failure, is this ok??
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*/
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pmsg_hdr = msg_hdr;
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goto out_respond_and_unlock;
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goto out_respond;
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}
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if (bus_info->pending_msg_hdr) {
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/* only non-NULL if dev is still waiting on a response */
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response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT;
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pmsg_hdr = bus_info->pending_msg_hdr;
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goto out_respond_and_unlock;
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goto out_respond;
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}
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if (need_response) {
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@ -951,7 +903,7 @@ bus_epilog(struct visor_device *bus_info,
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POSTCODE_LINUX_4(MALLOC_FAILURE_PC, cmd,
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bus_info->chipset_bus_no,
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POSTCODE_SEVERITY_ERR);
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goto out_unlock;
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return;
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}
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memcpy(pmsg_hdr, msg_hdr,
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@ -962,25 +914,16 @@ bus_epilog(struct visor_device *bus_info,
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if (response == CONTROLVM_RESP_SUCCESS) {
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switch (cmd) {
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case CONTROLVM_BUS_CREATE:
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if (busdev_notifiers.bus_create) {
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(*busdev_notifiers.bus_create) (bus_info);
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goto out_unlock;
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}
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chipset_bus_create(bus_info);
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break;
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case CONTROLVM_BUS_DESTROY:
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if (busdev_notifiers.bus_destroy) {
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(*busdev_notifiers.bus_destroy) (bus_info);
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goto out_unlock;
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}
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chipset_bus_destroy(bus_info);
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break;
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}
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}
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out_respond_and_unlock:
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out_respond:
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bus_responder(cmd, pmsg_hdr, response);
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out_unlock:
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up(¬ifier_lock);
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}
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static void
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@ -989,33 +932,29 @@ device_epilog(struct visor_device *dev_info,
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struct controlvm_message_header *msg_hdr, int response,
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bool need_response, bool for_visorbus)
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{
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struct visorchipset_busdev_notifiers *notifiers;
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struct controlvm_message_header *pmsg_hdr = NULL;
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notifiers = &busdev_notifiers;
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down(¬ifier_lock);
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if (!dev_info) {
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/*
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* relying on a valid passed in response code
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* be lazy and re-use msg_hdr for this failure, is this ok??
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*/
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pmsg_hdr = msg_hdr;
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goto out_respond_and_unlock;
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goto out_respond;
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}
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if (dev_info->pending_msg_hdr) {
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/* only non-NULL if dev is still waiting on a response */
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response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT;
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pmsg_hdr = dev_info->pending_msg_hdr;
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goto out_respond_and_unlock;
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goto out_respond;
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}
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if (need_response) {
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pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL);
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if (!pmsg_hdr) {
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response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED;
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goto out_respond_and_unlock;
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goto out_respond;
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}
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memcpy(pmsg_hdr, msg_hdr,
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@ -1026,20 +965,14 @@ device_epilog(struct visor_device *dev_info,
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if (response >= 0) {
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switch (cmd) {
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case CONTROLVM_DEVICE_CREATE:
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if (notifiers->device_create) {
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(*notifiers->device_create) (dev_info);
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goto out_unlock;
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}
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chipset_device_create(dev_info);
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break;
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case CONTROLVM_DEVICE_CHANGESTATE:
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/* ServerReady / ServerRunning / SegmentStateRunning */
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if (state.alive == segment_state_running.alive &&
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state.operating ==
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segment_state_running.operating) {
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if (notifiers->device_resume) {
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(*notifiers->device_resume) (dev_info);
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goto out_unlock;
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}
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chipset_device_resume(dev_info);
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}
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/* ServerNotReady / ServerLost / SegmentStateStandby */
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||||
else if (state.alive == segment_state_standby.alive &&
|
||||
@ -1049,26 +982,17 @@ device_epilog(struct visor_device *dev_info,
|
||||
* technically this is standby case
|
||||
* where server is lost
|
||||
*/
|
||||
if (notifiers->device_pause) {
|
||||
(*notifiers->device_pause) (dev_info);
|
||||
goto out_unlock;
|
||||
}
|
||||
chipset_device_pause(dev_info);
|
||||
}
|
||||
break;
|
||||
case CONTROLVM_DEVICE_DESTROY:
|
||||
if (notifiers->device_destroy) {
|
||||
(*notifiers->device_destroy) (dev_info);
|
||||
goto out_unlock;
|
||||
}
|
||||
chipset_device_destroy(dev_info);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
out_respond_and_unlock:
|
||||
out_respond:
|
||||
device_responder(cmd, pmsg_hdr, response);
|
||||
|
||||
out_unlock:
|
||||
up(¬ifier_lock);
|
||||
}
|
||||
|
||||
static void
|
||||
@ -1866,10 +1790,6 @@ controlvm_periodic_work(struct work_struct *work)
|
||||
bool got_command = false;
|
||||
bool handle_command_failed = false;
|
||||
|
||||
/* make sure visorbus server is registered for controlvm callbacks */
|
||||
if (visorchipset_visorbusregwait && !visorbusregistered)
|
||||
goto cleanup;
|
||||
|
||||
while (visorchannel_signalremove(controlvm_channel,
|
||||
CONTROLVM_QUEUE_RESPONSE,
|
||||
&inmsg))
|
||||
@ -1913,8 +1833,6 @@ controlvm_periodic_work(struct work_struct *work)
|
||||
/* parahotplug_worker */
|
||||
parahotplug_process_list();
|
||||
|
||||
cleanup:
|
||||
|
||||
if (time_after(jiffies,
|
||||
most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) {
|
||||
/*
|
||||
@ -1941,13 +1859,6 @@ setup_crash_devices_work_queue(struct work_struct *work)
|
||||
u32 local_crash_msg_offset;
|
||||
u16 local_crash_msg_count;
|
||||
|
||||
/* make sure visorbus is registered for controlvm callbacks */
|
||||
if (visorchipset_visorbusregwait && !visorbusregistered) {
|
||||
poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW;
|
||||
schedule_delayed_work(&periodic_controlvm_work, poll_jiffies);
|
||||
return;
|
||||
}
|
||||
|
||||
POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO);
|
||||
|
||||
/* send init chipset msg */
|
||||
@ -2025,7 +1936,7 @@ setup_crash_devices_work_queue(struct work_struct *work)
|
||||
POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO);
|
||||
}
|
||||
|
||||
static void
|
||||
void
|
||||
bus_create_response(struct visor_device *bus_info, int response)
|
||||
{
|
||||
if (response >= 0)
|
||||
@ -2038,7 +1949,7 @@ bus_create_response(struct visor_device *bus_info, int response)
|
||||
bus_info->pending_msg_hdr = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
void
|
||||
bus_destroy_response(struct visor_device *bus_info, int response)
|
||||
{
|
||||
bus_responder(CONTROLVM_BUS_DESTROY, bus_info->pending_msg_hdr,
|
||||
@ -2048,7 +1959,7 @@ bus_destroy_response(struct visor_device *bus_info, int response)
|
||||
bus_info->pending_msg_hdr = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
void
|
||||
device_create_response(struct visor_device *dev_info, int response)
|
||||
{
|
||||
if (response >= 0)
|
||||
@ -2061,7 +1972,7 @@ device_create_response(struct visor_device *dev_info, int response)
|
||||
dev_info->pending_msg_hdr = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
void
|
||||
device_destroy_response(struct visor_device *dev_info, int response)
|
||||
{
|
||||
device_responder(CONTROLVM_DEVICE_DESTROY, dev_info->pending_msg_hdr,
|
||||
@ -2071,7 +1982,7 @@ device_destroy_response(struct visor_device *dev_info, int response)
|
||||
dev_info->pending_msg_hdr = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
void
|
||||
visorchipset_device_pause_response(struct visor_device *dev_info,
|
||||
int response)
|
||||
{
|
||||
@ -2083,7 +1994,7 @@ visorchipset_device_pause_response(struct visor_device *dev_info,
|
||||
dev_info->pending_msg_hdr = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
void
|
||||
device_resume_response(struct visor_device *dev_info, int response)
|
||||
{
|
||||
device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE,
|
||||
@ -2290,7 +2201,6 @@ visorchipset_init(struct acpi_device *acpi_device)
|
||||
if (!addr)
|
||||
goto error;
|
||||
|
||||
memset(&busdev_notifiers, 0, sizeof(busdev_notifiers));
|
||||
memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info));
|
||||
|
||||
controlvm_channel = visorchannel_create_with_lock(addr, 0,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user