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path: root/drivers/misc/mic/scif/scif_main.c
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Diffstat (limited to 'drivers/misc/mic/scif/scif_main.c')
-rw-r--r--drivers/misc/mic/scif/scif_main.c351
1 files changed, 0 insertions, 351 deletions
diff --git a/drivers/misc/mic/scif/scif_main.c b/drivers/misc/mic/scif/scif_main.c
deleted file mode 100644
index e2278bf9f11d..000000000000
--- a/drivers/misc/mic/scif/scif_main.c
+++ /dev/null
@@ -1,351 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2014 Intel Corporation.
- *
- * Intel SCIF driver.
- */
-#include <linux/module.h>
-#include <linux/idr.h>
-
-#include <linux/mic_common.h>
-#include "../common/mic_dev.h"
-#include "../bus/scif_bus.h"
-#include "scif_peer_bus.h"
-#include "scif_main.h"
-#include "scif_map.h"
-
-struct scif_info scif_info = {
- .mdev = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "scif",
- .fops = &scif_fops,
- }
-};
-
-struct scif_dev *scif_dev;
-struct kmem_cache *unaligned_cache;
-static atomic_t g_loopb_cnt;
-
-/* Runs in the context of intr_wq */
-static void scif_intr_bh_handler(struct work_struct *work)
-{
- struct scif_dev *scifdev =
- container_of(work, struct scif_dev, intr_bh);
-
- if (scifdev_self(scifdev))
- scif_loopb_msg_handler(scifdev, scifdev->qpairs);
- else
- scif_nodeqp_intrhandler(scifdev, scifdev->qpairs);
-}
-
-int scif_setup_intr_wq(struct scif_dev *scifdev)
-{
- if (!scifdev->intr_wq) {
- snprintf(scifdev->intr_wqname, sizeof(scifdev->intr_wqname),
- "SCIF INTR %d", scifdev->node);
- scifdev->intr_wq =
- alloc_ordered_workqueue(scifdev->intr_wqname, 0);
- if (!scifdev->intr_wq)
- return -ENOMEM;
- INIT_WORK(&scifdev->intr_bh, scif_intr_bh_handler);
- }
- return 0;
-}
-
-void scif_destroy_intr_wq(struct scif_dev *scifdev)
-{
- if (scifdev->intr_wq) {
- destroy_workqueue(scifdev->intr_wq);
- scifdev->intr_wq = NULL;
- }
-}
-
-irqreturn_t scif_intr_handler(int irq, void *data)
-{
- struct scif_dev *scifdev = data;
- struct scif_hw_dev *sdev = scifdev->sdev;
-
- sdev->hw_ops->ack_interrupt(sdev, scifdev->db);
- queue_work(scifdev->intr_wq, &scifdev->intr_bh);
- return IRQ_HANDLED;
-}
-
-static void scif_qp_setup_handler(struct work_struct *work)
-{
- struct scif_dev *scifdev = container_of(work, struct scif_dev,
- qp_dwork.work);
- struct scif_hw_dev *sdev = scifdev->sdev;
- dma_addr_t da = 0;
- int err;
-
- if (scif_is_mgmt_node()) {
- struct mic_bootparam *bp = sdev->dp;
-
- da = bp->scif_card_dma_addr;
- scifdev->rdb = bp->h2c_scif_db;
- } else {
- struct mic_bootparam __iomem *bp = sdev->rdp;
-
- da = readq(&bp->scif_host_dma_addr);
- scifdev->rdb = ioread8(&bp->c2h_scif_db);
- }
- if (da) {
- err = scif_qp_response(da, scifdev);
- if (err)
- dev_err(&scifdev->sdev->dev,
- "scif_qp_response err %d\n", err);
- } else {
- schedule_delayed_work(&scifdev->qp_dwork,
- msecs_to_jiffies(1000));
- }
-}
-
-static int scif_setup_scifdev(void)
-{
- /* We support a maximum of 129 SCIF nodes including the mgmt node */
-#define MAX_SCIF_NODES 129
- int i;
- u8 num_nodes = MAX_SCIF_NODES;
-
- scif_dev = kcalloc(num_nodes, sizeof(*scif_dev), GFP_KERNEL);
- if (!scif_dev)
- return -ENOMEM;
- for (i = 0; i < num_nodes; i++) {
- struct scif_dev *scifdev = &scif_dev[i];
-
- scifdev->node = i;
- scifdev->exit = OP_IDLE;
- init_waitqueue_head(&scifdev->disconn_wq);
- mutex_init(&scifdev->lock);
- INIT_WORK(&scifdev->peer_add_work, scif_add_peer_device);
- INIT_DELAYED_WORK(&scifdev->p2p_dwork,
- scif_poll_qp_state);
- INIT_DELAYED_WORK(&scifdev->qp_dwork,
- scif_qp_setup_handler);
- INIT_LIST_HEAD(&scifdev->p2p);
- RCU_INIT_POINTER(scifdev->spdev, NULL);
- }
- return 0;
-}
-
-static void scif_destroy_scifdev(void)
-{
- kfree(scif_dev);
- scif_dev = NULL;
-}
-
-static int scif_probe(struct scif_hw_dev *sdev)
-{
- struct scif_dev *scifdev = &scif_dev[sdev->dnode];
- int rc;
-
- dev_set_drvdata(&sdev->dev, sdev);
- scifdev->sdev = sdev;
-
- if (1 == atomic_add_return(1, &g_loopb_cnt)) {
- struct scif_dev *loopb_dev = &scif_dev[sdev->snode];
-
- loopb_dev->sdev = sdev;
- rc = scif_setup_loopback_qp(loopb_dev);
- if (rc)
- goto exit;
- }
-
- rc = scif_setup_intr_wq(scifdev);
- if (rc)
- goto destroy_loopb;
- rc = scif_setup_qp(scifdev);
- if (rc)
- goto destroy_intr;
- scifdev->db = sdev->hw_ops->next_db(sdev);
- scifdev->cookie = sdev->hw_ops->request_irq(sdev, scif_intr_handler,
- "SCIF_INTR", scifdev,
- scifdev->db);
- if (IS_ERR(scifdev->cookie)) {
- rc = PTR_ERR(scifdev->cookie);
- goto free_qp;
- }
- if (scif_is_mgmt_node()) {
- struct mic_bootparam *bp = sdev->dp;
-
- bp->c2h_scif_db = scifdev->db;
- bp->scif_host_dma_addr = scifdev->qp_dma_addr;
- } else {
- struct mic_bootparam __iomem *bp = sdev->rdp;
-
- iowrite8(scifdev->db, &bp->h2c_scif_db);
- writeq(scifdev->qp_dma_addr, &bp->scif_card_dma_addr);
- }
- schedule_delayed_work(&scifdev->qp_dwork,
- msecs_to_jiffies(1000));
- return rc;
-free_qp:
- scif_free_qp(scifdev);
-destroy_intr:
- scif_destroy_intr_wq(scifdev);
-destroy_loopb:
- if (atomic_dec_and_test(&g_loopb_cnt))
- scif_destroy_loopback_qp(&scif_dev[sdev->snode]);
-exit:
- return rc;
-}
-
-void scif_stop(struct scif_dev *scifdev)
-{
- struct scif_dev *dev;
- int i;
-
- for (i = scif_info.maxid; i >= 0; i--) {
- dev = &scif_dev[i];
- if (scifdev_self(dev))
- continue;
- scif_handle_remove_node(i);
- }
-}
-
-static void scif_remove(struct scif_hw_dev *sdev)
-{
- struct scif_dev *scifdev = &scif_dev[sdev->dnode];
-
- if (scif_is_mgmt_node()) {
- struct mic_bootparam *bp = sdev->dp;
-
- bp->c2h_scif_db = -1;
- bp->scif_host_dma_addr = 0x0;
- } else {
- struct mic_bootparam __iomem *bp = sdev->rdp;
-
- iowrite8(-1, &bp->h2c_scif_db);
- writeq(0x0, &bp->scif_card_dma_addr);
- }
- if (scif_is_mgmt_node()) {
- scif_disconnect_node(scifdev->node, true);
- } else {
- scif_info.card_initiated_exit = true;
- scif_stop(scifdev);
- }
- if (atomic_dec_and_test(&g_loopb_cnt))
- scif_destroy_loopback_qp(&scif_dev[sdev->snode]);
- if (scifdev->cookie) {
- sdev->hw_ops->free_irq(sdev, scifdev->cookie, scifdev);
- scifdev->cookie = NULL;
- }
- scif_destroy_intr_wq(scifdev);
- cancel_delayed_work(&scifdev->qp_dwork);
- scif_free_qp(scifdev);
- scifdev->rdb = -1;
- scifdev->sdev = NULL;
-}
-
-static struct scif_hw_dev_id id_table[] = {
- { MIC_SCIF_DEV, SCIF_DEV_ANY_ID },
- { 0 },
-};
-
-static struct scif_driver scif_driver = {
- .driver.name = KBUILD_MODNAME,
- .driver.owner = THIS_MODULE,
- .id_table = id_table,
- .probe = scif_probe,
- .remove = scif_remove,
-};
-
-static int _scif_init(void)
-{
- int rc;
-
- mutex_init(&scif_info.eplock);
- spin_lock_init(&scif_info.rmalock);
- spin_lock_init(&scif_info.nb_connect_lock);
- spin_lock_init(&scif_info.port_lock);
- mutex_init(&scif_info.conflock);
- mutex_init(&scif_info.connlock);
- mutex_init(&scif_info.fencelock);
- INIT_LIST_HEAD(&scif_info.uaccept);
- INIT_LIST_HEAD(&scif_info.listen);
- INIT_LIST_HEAD(&scif_info.zombie);
- INIT_LIST_HEAD(&scif_info.connected);
- INIT_LIST_HEAD(&scif_info.disconnected);
- INIT_LIST_HEAD(&scif_info.rma);
- INIT_LIST_HEAD(&scif_info.rma_tc);
- INIT_LIST_HEAD(&scif_info.mmu_notif_cleanup);
- INIT_LIST_HEAD(&scif_info.fence);
- INIT_LIST_HEAD(&scif_info.nb_connect_list);
- init_waitqueue_head(&scif_info.exitwq);
- scif_info.rma_tc_limit = SCIF_RMA_TEMP_CACHE_LIMIT;
- scif_info.en_msg_log = 0;
- scif_info.p2p_enable = 1;
- rc = scif_setup_scifdev();
- if (rc)
- goto error;
- unaligned_cache = kmem_cache_create("Unaligned_DMA",
- SCIF_KMEM_UNALIGNED_BUF_SIZE,
- 0, SLAB_HWCACHE_ALIGN, NULL);
- if (!unaligned_cache) {
- rc = -ENOMEM;
- goto free_sdev;
- }
- INIT_WORK(&scif_info.misc_work, scif_misc_handler);
- INIT_WORK(&scif_info.mmu_notif_work, scif_mmu_notif_handler);
- INIT_WORK(&scif_info.conn_work, scif_conn_handler);
- idr_init(&scif_ports);
- return 0;
-free_sdev:
- scif_destroy_scifdev();
-error:
- return rc;
-}
-
-static void _scif_exit(void)
-{
- idr_destroy(&scif_ports);
- kmem_cache_destroy(unaligned_cache);
- scif_destroy_scifdev();
-}
-
-static int __init scif_init(void)
-{
- struct miscdevice *mdev = &scif_info.mdev;
- int rc;
-
- _scif_init();
- iova_cache_get();
- rc = scif_peer_bus_init();
- if (rc)
- goto exit;
- rc = scif_register_driver(&scif_driver);
- if (rc)
- goto peer_bus_exit;
- rc = misc_register(mdev);
- if (rc)
- goto unreg_scif;
- scif_init_debugfs();
- return 0;
-unreg_scif:
- scif_unregister_driver(&scif_driver);
-peer_bus_exit:
- scif_peer_bus_exit();
-exit:
- _scif_exit();
- return rc;
-}
-
-static void __exit scif_exit(void)
-{
- scif_exit_debugfs();
- misc_deregister(&scif_info.mdev);
- scif_unregister_driver(&scif_driver);
- scif_peer_bus_exit();
- iova_cache_put();
- _scif_exit();
-}
-
-module_init(scif_init);
-module_exit(scif_exit);
-
-MODULE_DEVICE_TABLE(scif, id_table);
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) SCIF driver");
-MODULE_LICENSE("GPL v2");