287 lines
8 KiB
C
287 lines
8 KiB
C
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/*
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* Copyright (c) 2019-2021 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#include <skywalk/os_skywalk_private.h>
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#include <skywalk/nexus/netif/nx_netif.h>
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#include <skywalk/nexus/flowswitch/fsw_var.h>
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#include <skywalk/nexus/flowswitch/nx_flowswitch.h>
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/*
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* Notification destination, can be either direct netif device,
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* or a flowswitch.
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*/
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struct __notif_dest {
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uint8_t dest_type;
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#define __NOTIF_DEST_NONE 0
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#define __NOTIF_DEST_FSW 1
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#define __NOTIF_DEST_NETIF 2
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union {
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struct nx_flowswitch *dest_fsw;
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struct nx_netif *dest_netif;
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};
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const char *dest_desc;
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};
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/* Create a notification destination from an ifnet device */
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static inline errno_t
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__notif_dest_by_ifp(struct __notif_dest *dest, const ifnet_t ifp)
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{
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struct nx_flowswitch *fsw;
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struct nx_netif *netif;
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if (dest == NULL || ifp == NULL) {
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return EINVAL;
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}
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if (!IF_FULLY_ATTACHED(ifp)) {
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return ENXIO;
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}
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if ((fsw = fsw_ifp_to_fsw(ifp)) != NULL) {
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dest->dest_type = __NOTIF_DEST_FSW;
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dest->dest_fsw = fsw;
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dest->dest_desc = if_name(ifp);
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return 0;
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}
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if ((netif = NA(ifp)->nifna_netif) != NULL) {
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dest->dest_type = __NOTIF_DEST_NETIF;
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dest->dest_netif = netif;
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dest->dest_desc = if_name(ifp);
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return 0;
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}
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return ENOENT;
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}
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/* Create a notification destination from a flowswitch uuid */
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static inline errno_t
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__notif_dest_by_nx_uuid(struct __notif_dest *dest, const uuid_t nx_uuid)
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{
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struct kern_nexus *nx;
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struct nx_flowswitch *fsw;
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if (dest == NULL) {
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return EINVAL;
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}
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if ((nx = nx_find(nx_uuid, FALSE)) == NULL) {
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return ENOENT;
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}
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if ((fsw = NX_FSW_PRIVATE(nx)) == NULL) {
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return ENOENT;
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}
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dest->dest_type = __NOTIF_DEST_FSW;
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dest->dest_fsw = fsw;
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dest->dest_desc = (fsw->fsw_ifp != NULL)
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? if_name(fsw->fsw_ifp)
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: "detached fsw";
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return 0;
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}
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/* function to send a packet channel event.
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*
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* Note on the event length limitations:
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* The event that goes onto the channel is emplaced
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* in a stack-allocated buffer, which includes
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* the space for the packet channel event data.
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* The size of the payload is governed by the
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* `CHANNEL_EVENT_MAX_PAYLOAD_LEN' constant.
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* See more details in `os_channel_event.h'
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*/
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static inline errno_t
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kern_channel_packet_event_notify(struct __notif_dest *dest,
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os_channel_event_type_t event_type, size_t event_dlen,
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uint8_t *event_data, uint32_t nx_port_id)
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{
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char buf[CHANNEL_EVENT_MAX_LEN]
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__attribute((aligned(sizeof(uint64_t))));
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struct __kern_channel_event *event =
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(struct __kern_channel_event *)(void *)buf;
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if (dest == NULL || dest->dest_desc == NULL) {
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return EINVAL;
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}
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if (sizeof(buf) < sizeof(event) + event_dlen) {
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return EINVAL;
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}
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if ((event_type < CHANNEL_EVENT_MIN) || (CHANNEL_EVENT_MAX < event_type)) {
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return EINVAL;
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}
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event->ev_type = event_type;
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event->ev_flags = 0;
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event->_reserved = 0;
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event->ev_dlen = (uint16_t)event_dlen;
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memcpy(event->ev_data, event_data, event_dlen);
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SK_DF(SK_VERB_EVENTS, "%s[%d] kern_channel_event: %p dest_type: %hu len: %hu "
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"type: %u flags: %u res: %hu dlen: %hu",
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dest->dest_desc, nx_port_id, event, event_dlen,
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event->ev_type, event->ev_flags, event->_reserved, event->ev_dlen);
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switch (dest->dest_type) {
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case __NOTIF_DEST_NETIF:
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return netif_vp_na_channel_event(dest->dest_netif,
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nx_port_id, event, CHANNEL_EVENT_MAX_LEN);
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case __NOTIF_DEST_FSW:
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return fsw_vp_na_channel_event(dest->dest_fsw,
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nx_port_id, event, CHANNEL_EVENT_MAX_LEN);
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default:
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return EINVAL;
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}
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}
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errno_t
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kern_channel_event_transmit_status_with_packet(const kern_packet_t ph,
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const ifnet_t ifp)
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{
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errno_t err;
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uint32_t nx_port_id;
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os_channel_event_packet_transmit_status_t pkt_tx_status;
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struct __notif_dest dest = {0, {NULL}, NULL};
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if ((err = __notif_dest_by_ifp(&dest, ifp)) != 0) {
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return err;
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}
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(void) __packet_get_tx_completion_status(ph,
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&pkt_tx_status.packet_status);
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if (pkt_tx_status.packet_status == KERN_SUCCESS) {
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return 0;
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}
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err = __packet_get_packetid(ph, &pkt_tx_status.packet_id);
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if (__improbable(err != 0)) {
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return err;
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}
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err = __packet_get_tx_nx_port_id(ph, &nx_port_id);
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if (__improbable(err != 0)) {
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return err;
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}
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return kern_channel_packet_event_notify(&dest,
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CHANNEL_EVENT_PACKET_TRANSMIT_STATUS,
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sizeof(pkt_tx_status), (uint8_t*)&pkt_tx_status, nx_port_id);
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}
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errno_t
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kern_channel_event_transmit_status(const ifnet_t ifp,
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os_channel_event_packet_transmit_status_t *pkt_tx_status,
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uint32_t nx_port_id)
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{
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errno_t err;
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struct __notif_dest dest = {0, {NULL}, NULL};
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if ((err = __notif_dest_by_ifp(&dest, ifp)) != 0) {
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return err;
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}
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return kern_channel_packet_event_notify(&dest,
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CHANNEL_EVENT_PACKET_TRANSMIT_STATUS,
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sizeof(*pkt_tx_status), (uint8_t*)pkt_tx_status, nx_port_id);
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}
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errno_t
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kern_channel_event_transmit_status_with_nexus(const uuid_t nx_uuid,
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os_channel_event_packet_transmit_status_t *pkt_tx_status,
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uint32_t nx_port_id)
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{
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errno_t err;
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struct __notif_dest dest = {0, {NULL}, NULL};
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if ((err = __notif_dest_by_nx_uuid(&dest, nx_uuid)) != 0) {
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return err;
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}
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return kern_channel_packet_event_notify(&dest,
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CHANNEL_EVENT_PACKET_TRANSMIT_STATUS,
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sizeof(*pkt_tx_status), (uint8_t*)pkt_tx_status, nx_port_id);
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}
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errno_t
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kern_channel_event_transmit_expired(const ifnet_t ifp,
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os_channel_event_packet_transmit_expired_t *pkt_tx_expired,
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uint32_t nx_port_id)
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{
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errno_t err;
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struct __notif_dest dest = {0, {NULL}, NULL};
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if ((err = __notif_dest_by_ifp(&dest, ifp)) != 0) {
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return err;
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}
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return kern_channel_packet_event_notify(&dest,
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CHANNEL_EVENT_PACKET_TRANSMIT_EXPIRED,
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sizeof(*pkt_tx_expired), (uint8_t*)pkt_tx_expired, nx_port_id);
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}
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extern errno_t
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kern_channel_event_transmit_expired_with_nexus(const uuid_t nx_uuid,
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os_channel_event_packet_transmit_expired_t *pkt_tx_expired,
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uint32_t nx_port_id)
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{
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errno_t err;
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struct __notif_dest dest = {0, {NULL}, NULL};
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if ((err = __notif_dest_by_nx_uuid(&dest, nx_uuid)) != 0) {
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return err;
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}
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return kern_channel_packet_event_notify(&dest,
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CHANNEL_EVENT_PACKET_TRANSMIT_EXPIRED,
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sizeof(*pkt_tx_expired), (uint8_t*)pkt_tx_expired, nx_port_id);
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}
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/* routine to post kevent notification for the event ring */
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void
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kern_channel_event_notify(struct __kern_channel_ring *kring)
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{
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ASSERT(kring->ckr_tx == NR_TX);
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SK_DF(SK_VERB_EVENTS, "%s(%d) na \"%s\" (0x%llx) kr 0x%llx",
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sk_proc_name_address(current_proc()), sk_proc_pid(current_proc()),
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KRNA(kring)->na_name, SK_KVA(KRNA(kring)), SK_KVA(kring));
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na_post_event(kring, TRUE, FALSE, FALSE, CHAN_FILT_HINT_CHANNEL_EVENT);
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}
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/* sync routine for the event ring */
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int
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kern_channel_event_sync(struct __kern_channel_ring *kring, struct proc *p,
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uint32_t flags)
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{
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#pragma unused(p, flags)
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(void) kr_reclaim(kring);
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return 0;
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}
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