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Diffstat (limited to 'sys/xen/evtchn/evtchnvar.h')
-rw-r--r-- | sys/xen/evtchn/evtchnvar.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/sys/xen/evtchn/evtchnvar.h b/sys/xen/evtchn/evtchnvar.h new file mode 100644 index 0000000..8008d23 --- /dev/null +++ b/sys/xen/evtchn/evtchnvar.h @@ -0,0 +1,105 @@ +/****************************************************************************** + * evtchn.h + * + * Data structures and definitions private to the FreeBSD implementation + * of the Xen event channel API. + * + * Copyright (c) 2004, K A Fraser + * Copyright (c) 2012, Spectra Logic Corporation + * + * This file may be distributed separately from the Linux kernel, or + * incorporated into other software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * $FreeBSD$ + */ + +#ifndef __XEN_EVTCHN_EVTCHNVAR_H__ +#define __XEN_EVTCHN_EVTCHNVAR_H__ + +#include <xen/hypervisor.h> +#include <xen/interface/event_channel.h> + +enum evtchn_type { + EVTCHN_TYPE_UNBOUND, + EVTCHN_TYPE_PIRQ, + EVTCHN_TYPE_VIRQ, + EVTCHN_TYPE_IPI, + EVTCHN_TYPE_PORT, + EVTCHN_TYPE_COUNT +}; + +/** Submit a port notification for delivery to a userland evtchn consumer */ +void evtchn_device_upcall(evtchn_port_t port); + +/** + * Disable signal delivery for an event channel port, returning its + * previous mask state. + * + * \param port The event channel port to query and mask. + * + * \returns 1 if event delivery was previously disabled. Otherwise 0. + */ +static inline int +evtchn_test_and_set_mask(evtchn_port_t port) +{ + shared_info_t *s = HYPERVISOR_shared_info; + return synch_test_and_set_bit(port, s->evtchn_mask); +} + +/** + * Clear any pending event for the given event channel port. + * + * \param port The event channel port to clear. + */ +static inline void +evtchn_clear_port(evtchn_port_t port) +{ + shared_info_t *s = HYPERVISOR_shared_info; + synch_clear_bit(port, &s->evtchn_pending[0]); +} + +/** + * Disable signal delivery for an event channel port. + * + * \param port The event channel port to mask. + */ +static inline void +evtchn_mask_port(evtchn_port_t port) +{ + shared_info_t *s = HYPERVISOR_shared_info; + + synch_set_bit(port, &s->evtchn_mask[0]); +} + +/** + * Enable signal delivery for an event channel port. + * + * \param port The event channel port to enable. + */ +static inline void +evtchn_unmask_port(evtchn_port_t port) +{ + evtchn_unmask_t op = { .port = port }; + + HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &op); +} + +#endif /* __XEN_EVTCHN_EVTCHNVAR_H__ */ |