diff options
Diffstat (limited to 'drivers/misc/mic/scif/scif_nm.c')
| -rw-r--r-- | drivers/misc/mic/scif/scif_nm.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/drivers/misc/mic/scif/scif_nm.c b/drivers/misc/mic/scif/scif_nm.c deleted file mode 100644 index c4d9422082b7..000000000000 --- a/drivers/misc/mic/scif/scif_nm.c +++ /dev/null @@ -1,229 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Intel MIC Platform Software Stack (MPSS) - * - * Copyright(c) 2014 Intel Corporation. - * - * Intel SCIF driver. - */ -#include "scif_peer_bus.h" - -#include "scif_main.h" -#include "scif_map.h" - -/** - * scif_invalidate_ep() - Set state for all connected endpoints - * to disconnected and wake up all send/recv waitqueues - * - * @node: Node to invalidate - */ -static void scif_invalidate_ep(int node) -{ - struct scif_endpt *ep; - struct list_head *pos, *tmpq; - - flush_work(&scif_info.conn_work); - mutex_lock(&scif_info.connlock); - list_for_each_safe(pos, tmpq, &scif_info.disconnected) { - ep = list_entry(pos, struct scif_endpt, list); - if (ep->remote_dev->node == node) { - scif_unmap_all_windows(ep); - spin_lock(&ep->lock); - scif_cleanup_ep_qp(ep); - spin_unlock(&ep->lock); - } - } - list_for_each_safe(pos, tmpq, &scif_info.connected) { - ep = list_entry(pos, struct scif_endpt, list); - if (ep->remote_dev->node == node) { - list_del(pos); - spin_lock(&ep->lock); - ep->state = SCIFEP_DISCONNECTED; - list_add_tail(&ep->list, &scif_info.disconnected); - scif_cleanup_ep_qp(ep); - wake_up_interruptible(&ep->sendwq); - wake_up_interruptible(&ep->recvwq); - spin_unlock(&ep->lock); - scif_unmap_all_windows(ep); - } - } - mutex_unlock(&scif_info.connlock); -} - -void scif_free_qp(struct scif_dev *scifdev) -{ - struct scif_qp *qp = scifdev->qpairs; - - if (!qp) - return; - scif_unmap_single(qp->local_buf, scifdev, qp->inbound_q.size); - kfree(qp->inbound_q.rb_base); - scif_unmap_single(qp->local_qp, scifdev, sizeof(struct scif_qp)); - kfree(scifdev->qpairs); - scifdev->qpairs = NULL; -} - -static void scif_cleanup_qp(struct scif_dev *dev) -{ - struct scif_qp *qp = &dev->qpairs[0]; - - if (!qp) - return; - scif_iounmap((void *)qp->remote_qp, sizeof(struct scif_qp), dev); - scif_iounmap((void *)qp->outbound_q.rb_base, - sizeof(struct scif_qp), dev); - qp->remote_qp = NULL; - qp->local_write = 0; - qp->inbound_q.current_write_offset = 0; - qp->inbound_q.current_read_offset = 0; - if (scifdev_is_p2p(dev)) - scif_free_qp(dev); -} - -void scif_send_acks(struct scif_dev *dev) -{ - struct scifmsg msg; - - if (dev->node_remove_ack_pending) { - msg.uop = SCIF_NODE_REMOVE_ACK; - msg.src.node = scif_info.nodeid; - msg.dst.node = SCIF_MGMT_NODE; - msg.payload[0] = dev->node; - scif_nodeqp_send(&scif_dev[SCIF_MGMT_NODE], &msg); - dev->node_remove_ack_pending = false; - } - if (dev->exit_ack_pending) { - msg.uop = SCIF_EXIT_ACK; - msg.src.node = scif_info.nodeid; - msg.dst.node = dev->node; - scif_nodeqp_send(dev, &msg); - dev->exit_ack_pending = false; - } -} - -/** - * scif_cleanup_scifdev - Uninitialize SCIF data structures for remote - * SCIF device. - * @dev: Remote SCIF device. - */ -void scif_cleanup_scifdev(struct scif_dev *dev) -{ - struct scif_hw_dev *sdev = dev->sdev; - - if (!dev->sdev) - return; - if (scifdev_is_p2p(dev)) { - if (dev->cookie) { - sdev->hw_ops->free_irq(sdev, dev->cookie, dev); - dev->cookie = NULL; - } - scif_destroy_intr_wq(dev); - } - flush_work(&scif_info.misc_work); - scif_destroy_p2p(dev); - scif_invalidate_ep(dev->node); - scif_zap_mmaps(dev->node); - scif_cleanup_rma_for_zombies(dev->node); - flush_work(&scif_info.misc_work); - scif_send_acks(dev); - if (!dev->node && scif_info.card_initiated_exit) { - /* - * Send an SCIF_EXIT message which is the last message from MIC - * to the Host and wait for a SCIF_EXIT_ACK - */ - scif_send_exit(dev); - scif_info.card_initiated_exit = false; - } - scif_cleanup_qp(dev); -} - -/** - * scif_remove_node - * - * @node: Node to remove - */ -void scif_handle_remove_node(int node) -{ - struct scif_dev *scifdev = &scif_dev[node]; - - if (scif_peer_unregister_device(scifdev)) - scif_send_acks(scifdev); -} - -static int scif_send_rmnode_msg(int node, int remove_node) -{ - struct scifmsg notif_msg; - struct scif_dev *dev = &scif_dev[node]; - - notif_msg.uop = SCIF_NODE_REMOVE; - notif_msg.src.node = scif_info.nodeid; - notif_msg.dst.node = node; - notif_msg.payload[0] = remove_node; - return scif_nodeqp_send(dev, ¬if_msg); -} - -/** - * scif_node_disconnect - * - * @node_id: source node id [in] - * @mgmt_initiated: Disconnection initiated from the mgmt node - * - * Disconnect a node from the scif network. - */ -void scif_disconnect_node(u32 node_id, bool mgmt_initiated) -{ - int ret; - int msg_cnt = 0; - u32 i = 0; - struct scif_dev *scifdev = &scif_dev[node_id]; - - if (!node_id) - return; - - atomic_set(&scifdev->disconn_rescnt, 0); - - /* Destroy p2p network */ - for (i = 1; i <= scif_info.maxid; i++) { - if (i == node_id) - continue; - ret = scif_send_rmnode_msg(i, node_id); - if (!ret) - msg_cnt++; - } - /* Wait for the remote nodes to respond with SCIF_NODE_REMOVE_ACK */ - ret = wait_event_timeout(scifdev->disconn_wq, - (atomic_read(&scifdev->disconn_rescnt) - == msg_cnt), SCIF_NODE_ALIVE_TIMEOUT); - /* Tell the card to clean up */ - if (mgmt_initiated && _scifdev_alive(scifdev)) - /* - * Send an SCIF_EXIT message which is the last message from Host - * to the MIC and wait for a SCIF_EXIT_ACK - */ - scif_send_exit(scifdev); - atomic_set(&scifdev->disconn_rescnt, 0); - /* Tell the mgmt node to clean up */ - ret = scif_send_rmnode_msg(SCIF_MGMT_NODE, node_id); - if (!ret) - /* Wait for mgmt node to respond with SCIF_NODE_REMOVE_ACK */ - wait_event_timeout(scifdev->disconn_wq, - (atomic_read(&scifdev->disconn_rescnt) == 1), - SCIF_NODE_ALIVE_TIMEOUT); -} - -void scif_get_node_info(void) -{ - struct scifmsg msg; - DECLARE_COMPLETION_ONSTACK(node_info); - - msg.uop = SCIF_GET_NODE_INFO; - msg.src.node = scif_info.nodeid; - msg.dst.node = SCIF_MGMT_NODE; - msg.payload[3] = (u64)&node_info; - - if ((scif_nodeqp_send(&scif_dev[SCIF_MGMT_NODE], &msg))) - return; - - /* Wait for a response with SCIF_GET_NODE_INFO */ - wait_for_completion(&node_info); -} |