forked from Minki/linux
misc: mic: SCIF module initialization
SCIF module initialization, DMA mapping, ioremap wrapper APIs and debugfs hooks. SCIF gets probed by the SCIF hardware bus if SCIF devices were registered by base drivers. A MISC device is registered to provide the SCIF character device interface. Reviewed-by: Nikhil Rao <nikhil.rao@intel.com> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sudeep Dutt
Greg Kroah-Hartman
parent
c9d5c53db9
commit
fb4d0e3d4f
85
drivers/misc/mic/scif/scif_debugfs.c
Normal file
85
drivers/misc/mic/scif/scif_debugfs.c
Normal file
@ -0,0 +1,85 @@
|
||||
/*
|
||||
* Intel MIC Platform Software Stack (MPSS)
|
||||
*
|
||||
* Copyright(c) 2014 Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* Intel SCIF driver.
|
||||
*
|
||||
*/
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/seq_file.h>
|
||||
|
||||
#include "../common/mic_dev.h"
|
||||
#include "scif_main.h"
|
||||
|
||||
/* Debugfs parent dir */
|
||||
static struct dentry *scif_dbg;
|
||||
|
||||
static int scif_dev_test(struct seq_file *s, void *unused)
|
||||
{
|
||||
int node;
|
||||
|
||||
seq_printf(s, "Total Nodes %d Self Node Id %d Maxid %d\n",
|
||||
scif_info.total, scif_info.nodeid,
|
||||
scif_info.maxid);
|
||||
|
||||
if (!scif_dev)
|
||||
return 0;
|
||||
|
||||
seq_printf(s, "%-16s\t%-16s\n", "node_id", "state");
|
||||
|
||||
for (node = 0; node <= scif_info.maxid; node++)
|
||||
seq_printf(s, "%-16d\t%-16s\n", scif_dev[node].node,
|
||||
_scifdev_alive(&scif_dev[node]) ?
|
||||
"Running" : "Offline");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int scif_dev_test_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return single_open(file, scif_dev_test, inode->i_private);
|
||||
}
|
||||
|
||||
static int scif_dev_test_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
return single_release(inode, file);
|
||||
}
|
||||
|
||||
static const struct file_operations scif_dev_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = scif_dev_test_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = scif_dev_test_release
|
||||
};
|
||||
|
||||
void __init scif_init_debugfs(void)
|
||||
{
|
||||
struct dentry *d;
|
||||
|
||||
scif_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
|
||||
if (!scif_dbg) {
|
||||
dev_err(scif_info.mdev.this_device,
|
||||
"can't create debugfs dir scif\n");
|
||||
return;
|
||||
}
|
||||
|
||||
d = debugfs_create_file("scif_dev", 0444, scif_dbg,
|
||||
NULL, &scif_dev_ops);
|
||||
debugfs_create_u8("en_msg_log", 0666, scif_dbg, &scif_info.en_msg_log);
|
||||
debugfs_create_u8("p2p_enable", 0666, scif_dbg, &scif_info.p2p_enable);
|
||||
}
|
||||
|
||||
void scif_exit_debugfs(void)
|
||||
{
|
||||
debugfs_remove_recursive(scif_dbg);
|
||||
}
|
||||
391
drivers/misc/mic/scif/scif_main.c
Normal file
391
drivers/misc/mic/scif/scif_main.c
Normal file
@ -0,0 +1,391 @@
|
||||
/*
|
||||
* Intel MIC Platform Software Stack (MPSS)
|
||||
*
|
||||
* Copyright(c) 2014 Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* 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;
|
||||
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 int scif_peer_probe(struct scif_peer_dev *spdev)
|
||||
{
|
||||
struct scif_dev *scifdev = &scif_dev[spdev->dnode];
|
||||
|
||||
mutex_lock(&scif_info.conflock);
|
||||
scif_info.total++;
|
||||
scif_info.maxid = max_t(u32, spdev->dnode, scif_info.maxid);
|
||||
mutex_unlock(&scif_info.conflock);
|
||||
rcu_assign_pointer(scifdev->spdev, spdev);
|
||||
|
||||
/* In the future SCIF kernel client devices will be added here */
|
||||
dev_info(&spdev->dev, "Peer added dnode %d\n",
|
||||
spdev->dnode);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void scif_peer_remove(struct scif_peer_dev *spdev)
|
||||
{
|
||||
struct scif_dev *scifdev = &scif_dev[spdev->dnode];
|
||||
|
||||
/* In the future SCIF kernel client devices will be removed here */
|
||||
spdev = rcu_dereference(scifdev->spdev);
|
||||
if (spdev)
|
||||
RCU_INIT_POINTER(scifdev->spdev, NULL);
|
||||
synchronize_rcu();
|
||||
|
||||
mutex_lock(&scif_info.conflock);
|
||||
scif_info.total--;
|
||||
mutex_unlock(&scif_info.conflock);
|
||||
dev_info(&spdev->dev, "Peer removed dnode %d\n",
|
||||
spdev->dnode);
|
||||
}
|
||||
|
||||
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(struct scif_hw_dev *sdev)
|
||||
{
|
||||
int i;
|
||||
u8 num_nodes;
|
||||
|
||||
if (sdev->snode) {
|
||||
struct mic_bootparam __iomem *bp = sdev->rdp;
|
||||
|
||||
num_nodes = ioread8(&bp->tot_nodes);
|
||||
} else {
|
||||
struct mic_bootparam *bp = sdev->dp;
|
||||
|
||||
num_nodes = bp->tot_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->init_msg_work, scif_qp_response_ack);
|
||||
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);
|
||||
}
|
||||
|
||||
static int scif_probe(struct scif_hw_dev *sdev)
|
||||
{
|
||||
struct scif_dev *scifdev;
|
||||
int rc;
|
||||
|
||||
dev_set_drvdata(&sdev->dev, sdev);
|
||||
if (1 == atomic_add_return(1, &g_loopb_cnt)) {
|
||||
struct scif_dev *loopb_dev;
|
||||
|
||||
rc = scif_setup_scifdev(sdev);
|
||||
if (rc)
|
||||
goto exit;
|
||||
scifdev = &scif_dev[sdev->dnode];
|
||||
scifdev->sdev = sdev;
|
||||
loopb_dev = &scif_dev[sdev->snode];
|
||||
loopb_dev->sdev = sdev;
|
||||
rc = scif_setup_loopback_qp(loopb_dev);
|
||||
if (rc)
|
||||
goto free_sdev;
|
||||
} else {
|
||||
scifdev = &scif_dev[sdev->dnode];
|
||||
scifdev->sdev = sdev;
|
||||
}
|
||||
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]);
|
||||
free_sdev:
|
||||
scif_destroy_scifdev();
|
||||
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_peer_driver scif_peer_driver = {
|
||||
.driver.name = KBUILD_MODNAME,
|
||||
.driver.owner = THIS_MODULE,
|
||||
.probe = scif_peer_probe,
|
||||
.remove = scif_peer_remove,
|
||||
};
|
||||
|
||||
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)
|
||||
{
|
||||
spin_lock_init(&scif_info.eplock);
|
||||
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);
|
||||
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.nb_connect_list);
|
||||
init_waitqueue_head(&scif_info.exitwq);
|
||||
scif_info.en_msg_log = 0;
|
||||
scif_info.p2p_enable = 1;
|
||||
INIT_WORK(&scif_info.misc_work, scif_misc_handler);
|
||||
idr_init(&scif_ports);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void _scif_exit(void)
|
||||
{
|
||||
idr_destroy(&scif_ports);
|
||||
scif_destroy_scifdev();
|
||||
}
|
||||
|
||||
static int __init scif_init(void)
|
||||
{
|
||||
struct miscdevice *mdev = &scif_info.mdev;
|
||||
int rc;
|
||||
|
||||
_scif_init();
|
||||
rc = scif_peer_bus_init();
|
||||
if (rc)
|
||||
goto exit;
|
||||
rc = scif_peer_register_driver(&scif_peer_driver);
|
||||
if (rc)
|
||||
goto peer_bus_exit;
|
||||
rc = scif_register_driver(&scif_driver);
|
||||
if (rc)
|
||||
goto unreg_scif_peer;
|
||||
rc = misc_register(mdev);
|
||||
if (rc)
|
||||
goto unreg_scif;
|
||||
scif_init_debugfs();
|
||||
return 0;
|
||||
unreg_scif:
|
||||
scif_unregister_driver(&scif_driver);
|
||||
unreg_scif_peer:
|
||||
scif_peer_unregister_driver(&scif_peer_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_unregister_driver(&scif_peer_driver);
|
||||
scif_peer_bus_exit();
|
||||
_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");
|
||||
252
drivers/misc/mic/scif/scif_main.h
Normal file
252
drivers/misc/mic/scif/scif_main.h
Normal file
@ -0,0 +1,252 @@
|
||||
/*
|
||||
* Intel MIC Platform Software Stack (MPSS)
|
||||
*
|
||||
* Copyright(c) 2014 Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* Intel SCIF driver.
|
||||
*
|
||||
*/
|
||||
#ifndef SCIF_MAIN_H
|
||||
#define SCIF_MAIN_H
|
||||
|
||||
#include <linux/sched.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/dmaengine.h>
|
||||
#include <linux/file.h>
|
||||
#include <linux/scif.h>
|
||||
|
||||
#include "../common/mic_dev.h"
|
||||
|
||||
#define SCIF_MGMT_NODE 0
|
||||
#define SCIF_DEFAULT_WATCHDOG_TO 30
|
||||
#define SCIF_NODE_ACCEPT_TIMEOUT (3 * HZ)
|
||||
#define SCIF_NODE_ALIVE_TIMEOUT (SCIF_DEFAULT_WATCHDOG_TO * HZ)
|
||||
|
||||
/*
|
||||
* Generic state used for certain node QP message exchanges
|
||||
* like Unregister, Alloc etc.
|
||||
*/
|
||||
enum scif_msg_state {
|
||||
OP_IDLE = 1,
|
||||
OP_IN_PROGRESS,
|
||||
OP_COMPLETED,
|
||||
OP_FAILED
|
||||
};
|
||||
|
||||
/*
|
||||
* struct scif_info - Global SCIF information
|
||||
*
|
||||
* @nodeid: Node ID this node is to others
|
||||
* @maxid: Max known node ID
|
||||
* @total: Total number of SCIF nodes
|
||||
* @nr_zombies: number of zombie endpoints
|
||||
* @eplock: Lock to synchronize listening, zombie endpoint lists
|
||||
* @connlock: Lock to synchronize connected and disconnected lists
|
||||
* @nb_connect_lock: Synchronize non blocking connect operations
|
||||
* @port_lock: Synchronize access to SCIF ports
|
||||
* @uaccept: List of user acceptreq waiting for acceptreg
|
||||
* @listen: List of listening end points
|
||||
* @zombie: List of zombie end points with pending RMA's
|
||||
* @connected: List of end points in connected state
|
||||
* @disconnected: List of end points in disconnected state
|
||||
* @nb_connect_list: List for non blocking connections
|
||||
* @misc_work: miscellaneous SCIF tasks
|
||||
* @conflock: Lock to synchronize SCIF node configuration changes
|
||||
* @en_msg_log: Enable debug message logging
|
||||
* @p2p_enable: Enable P2P SCIF network
|
||||
* @mdev: The MISC device
|
||||
* @conn_work: Work for workqueue handling all connections
|
||||
* @exitwq: Wait queue for waiting for an EXIT node QP message response
|
||||
* @loopb_dev: Dummy SCIF device used for loopback
|
||||
* @loopb_wq: Workqueue used for handling loopback messages
|
||||
* @loopb_wqname[16]: Name of loopback workqueue
|
||||
* @loopb_work: Used for submitting work to loopb_wq
|
||||
* @loopb_recv_q: List of messages received on the loopb_wq
|
||||
* @card_initiated_exit: set when the card has initiated the exit
|
||||
*/
|
||||
struct scif_info {
|
||||
u8 nodeid;
|
||||
u8 maxid;
|
||||
u8 total;
|
||||
u32 nr_zombies;
|
||||
spinlock_t eplock;
|
||||
struct mutex connlock;
|
||||
spinlock_t nb_connect_lock;
|
||||
spinlock_t port_lock;
|
||||
struct list_head uaccept;
|
||||
struct list_head listen;
|
||||
struct list_head zombie;
|
||||
struct list_head connected;
|
||||
struct list_head disconnected;
|
||||
struct list_head nb_connect_list;
|
||||
struct work_struct misc_work;
|
||||
struct mutex conflock;
|
||||
u8 en_msg_log;
|
||||
u8 p2p_enable;
|
||||
struct miscdevice mdev;
|
||||
struct work_struct conn_work;
|
||||
wait_queue_head_t exitwq;
|
||||
struct scif_dev *loopb_dev;
|
||||
struct workqueue_struct *loopb_wq;
|
||||
char loopb_wqname[16];
|
||||
struct work_struct loopb_work;
|
||||
struct list_head loopb_recv_q;
|
||||
bool card_initiated_exit;
|
||||
};
|
||||
|
||||
/*
|
||||
* struct scif_p2p_info - SCIF mapping information used for P2P
|
||||
*
|
||||
* @ppi_peer_id - SCIF peer node id
|
||||
* @ppi_sg - Scatter list for bar information (One for mmio and one for aper)
|
||||
* @sg_nentries - Number of entries in the scatterlist
|
||||
* @ppi_da: DMA address for MMIO and APER bars
|
||||
* @ppi_len: Length of MMIO and APER bars
|
||||
* @ppi_list: Link in list of mapping information
|
||||
*/
|
||||
struct scif_p2p_info {
|
||||
u8 ppi_peer_id;
|
||||
struct scatterlist *ppi_sg[2];
|
||||
u64 sg_nentries[2];
|
||||
dma_addr_t ppi_da[2];
|
||||
u64 ppi_len[2];
|
||||
#define SCIF_PPI_MMIO 0
|
||||
#define SCIF_PPI_APER 1
|
||||
struct list_head ppi_list;
|
||||
};
|
||||
|
||||
/*
|
||||
* struct scif_dev - SCIF remote device specific fields
|
||||
*
|
||||
* @node: Node id
|
||||
* @p2p: List of P2P mapping information
|
||||
* @qpairs: The node queue pair for exchanging control messages
|
||||
* @intr_wq: Workqueue for handling Node QP messages
|
||||
* @intr_wqname: Name of node QP workqueue for handling interrupts
|
||||
* @intr_bh: Used for submitting work to intr_wq
|
||||
* @lock: Lock used for synchronizing access to the scif device
|
||||
* @sdev: SCIF hardware device on the SCIF hardware bus
|
||||
* @db: doorbell the peer will trigger to generate an interrupt on self
|
||||
* @rdb: Doorbell to trigger on the peer to generate an interrupt on the peer
|
||||
* @cookie: Cookie received while registering the interrupt handler
|
||||
* init_msg_work: work scheduled for SCIF_INIT message processing
|
||||
* @p2p_dwork: Delayed work to enable polling for P2P state
|
||||
* @qp_dwork: Delayed work for enabling polling for remote QP information
|
||||
* @p2p_retry: Number of times to retry polling of P2P state
|
||||
* @base_addr: P2P aperture bar base address
|
||||
* @mic_mw mmio: The peer MMIO information used for P2P
|
||||
* @spdev: SCIF peer device on the SCIF peer bus
|
||||
* @node_remove_ack_pending: True if a node_remove_ack is pending
|
||||
* @exit_ack_pending: true if an exit_ack is pending
|
||||
* @disconn_wq: Used while waiting for a node remove response
|
||||
* @disconn_rescnt: Keeps track of number of node remove requests sent
|
||||
* @exit: Status of exit message
|
||||
* @qp_dma_addr: Queue pair DMA address passed to the peer
|
||||
*/
|
||||
struct scif_dev {
|
||||
u8 node;
|
||||
struct list_head p2p;
|
||||
struct scif_qp *qpairs;
|
||||
struct workqueue_struct *intr_wq;
|
||||
char intr_wqname[16];
|
||||
struct work_struct intr_bh;
|
||||
struct mutex lock;
|
||||
struct scif_hw_dev *sdev;
|
||||
int db;
|
||||
int rdb;
|
||||
struct mic_irq *cookie;
|
||||
struct work_struct init_msg_work;
|
||||
struct delayed_work p2p_dwork;
|
||||
struct delayed_work qp_dwork;
|
||||
int p2p_retry;
|
||||
dma_addr_t base_addr;
|
||||
struct mic_mw mmio;
|
||||
struct scif_peer_dev __rcu *spdev;
|
||||
bool node_remove_ack_pending;
|
||||
bool exit_ack_pending;
|
||||
wait_queue_head_t disconn_wq;
|
||||
atomic_t disconn_rescnt;
|
||||
enum scif_msg_state exit;
|
||||
dma_addr_t qp_dma_addr;
|
||||
};
|
||||
|
||||
extern struct scif_info scif_info;
|
||||
extern struct idr scif_ports;
|
||||
extern struct scif_dev *scif_dev;
|
||||
extern const struct file_operations scif_fops;
|
||||
|
||||
/* Size of the RB for the Node QP */
|
||||
#define SCIF_NODE_QP_SIZE 0x10000
|
||||
|
||||
#include "scif_nodeqp.h"
|
||||
|
||||
/*
|
||||
* scifdev_self:
|
||||
* @dev: The remote SCIF Device
|
||||
*
|
||||
* Returns true if the SCIF Device passed is the self aka Loopback SCIF device.
|
||||
*/
|
||||
static inline int scifdev_self(struct scif_dev *dev)
|
||||
{
|
||||
return dev->node == scif_info.nodeid;
|
||||
}
|
||||
|
||||
static inline bool scif_is_mgmt_node(void)
|
||||
{
|
||||
return !scif_info.nodeid;
|
||||
}
|
||||
|
||||
/*
|
||||
* scifdev_is_p2p:
|
||||
* @dev: The remote SCIF Device
|
||||
*
|
||||
* Returns true if the SCIF Device is a MIC Peer to Peer SCIF device.
|
||||
*/
|
||||
static inline bool scifdev_is_p2p(struct scif_dev *dev)
|
||||
{
|
||||
if (scif_is_mgmt_node())
|
||||
return false;
|
||||
else
|
||||
return dev != &scif_dev[SCIF_MGMT_NODE] &&
|
||||
!scifdev_self(dev);
|
||||
}
|
||||
|
||||
/*
|
||||
* scifdev_alive:
|
||||
* @scifdev: The remote SCIF Device
|
||||
*
|
||||
* Returns true if the remote SCIF Device is running or sleeping for
|
||||
* this endpoint.
|
||||
*/
|
||||
static inline int _scifdev_alive(struct scif_dev *scifdev)
|
||||
{
|
||||
struct scif_peer_dev *spdev;
|
||||
|
||||
rcu_read_lock();
|
||||
spdev = rcu_dereference(scifdev->spdev);
|
||||
rcu_read_unlock();
|
||||
return !!spdev;
|
||||
}
|
||||
|
||||
void __init scif_init_debugfs(void);
|
||||
void scif_exit_debugfs(void);
|
||||
int scif_setup_intr_wq(struct scif_dev *scifdev);
|
||||
void scif_destroy_intr_wq(struct scif_dev *scifdev);
|
||||
void scif_cleanup_scifdev(struct scif_dev *dev);
|
||||
void scif_handle_remove_node(int node);
|
||||
void scif_disconnect_node(u32 node_id, bool mgmt_initiated);
|
||||
void scif_free_qp(struct scif_dev *dev);
|
||||
void scif_misc_handler(struct work_struct *work);
|
||||
void scif_stop(struct scif_dev *scifdev);
|
||||
irqreturn_t scif_intr_handler(int irq, void *data);
|
||||
#endif /* SCIF_MAIN_H */
|
||||
113
drivers/misc/mic/scif/scif_map.h
Normal file
113
drivers/misc/mic/scif/scif_map.h
Normal file
@ -0,0 +1,113 @@
|
||||
/*
|
||||
* Intel MIC Platform Software Stack (MPSS)
|
||||
*
|
||||
* Copyright(c) 2014 Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* Intel SCIF driver.
|
||||
*
|
||||
*/
|
||||
#ifndef SCIF_MAP_H
|
||||
#define SCIF_MAP_H
|
||||
|
||||
#include "../bus/scif_bus.h"
|
||||
|
||||
static __always_inline void *
|
||||
scif_alloc_coherent(dma_addr_t *dma_handle,
|
||||
struct scif_dev *scifdev, size_t size,
|
||||
gfp_t gfp)
|
||||
{
|
||||
void *va;
|
||||
|
||||
if (scifdev_self(scifdev)) {
|
||||
va = kmalloc(size, gfp);
|
||||
if (va)
|
||||
*dma_handle = virt_to_phys(va);
|
||||
} else {
|
||||
va = dma_alloc_coherent(&scifdev->sdev->dev,
|
||||
size, dma_handle, gfp);
|
||||
if (va && scifdev_is_p2p(scifdev))
|
||||
*dma_handle = *dma_handle + scifdev->base_addr;
|
||||
}
|
||||
return va;
|
||||
}
|
||||
|
||||
static __always_inline void
|
||||
scif_free_coherent(void *va, dma_addr_t local,
|
||||
struct scif_dev *scifdev, size_t size)
|
||||
{
|
||||
if (scifdev_self(scifdev)) {
|
||||
kfree(va);
|
||||
} else {
|
||||
if (scifdev_is_p2p(scifdev) && local > scifdev->base_addr)
|
||||
local = local - scifdev->base_addr;
|
||||
dma_free_coherent(&scifdev->sdev->dev,
|
||||
size, va, local);
|
||||
}
|
||||
}
|
||||
|
||||
static __always_inline int
|
||||
scif_map_single(dma_addr_t *dma_handle,
|
||||
void *local, struct scif_dev *scifdev, size_t size)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
if (scifdev_self(scifdev)) {
|
||||
*dma_handle = virt_to_phys((local));
|
||||
} else {
|
||||
*dma_handle = dma_map_single(&scifdev->sdev->dev,
|
||||
local, size, DMA_BIDIRECTIONAL);
|
||||
if (dma_mapping_error(&scifdev->sdev->dev, *dma_handle))
|
||||
err = -ENOMEM;
|
||||
else if (scifdev_is_p2p(scifdev))
|
||||
*dma_handle = *dma_handle + scifdev->base_addr;
|
||||
}
|
||||
if (err)
|
||||
*dma_handle = 0;
|
||||
return err;
|
||||
}
|
||||
|
||||
static __always_inline void
|
||||
scif_unmap_single(dma_addr_t local, struct scif_dev *scifdev,
|
||||
size_t size)
|
||||
{
|
||||
if (!scifdev_self(scifdev)) {
|
||||
if (scifdev_is_p2p(scifdev) && local > scifdev->base_addr)
|
||||
local = local - scifdev->base_addr;
|
||||
dma_unmap_single(&scifdev->sdev->dev, local,
|
||||
size, DMA_BIDIRECTIONAL);
|
||||
}
|
||||
}
|
||||
|
||||
static __always_inline void *
|
||||
scif_ioremap(dma_addr_t phys, size_t size, struct scif_dev *scifdev)
|
||||
{
|
||||
void *out_virt;
|
||||
struct scif_hw_dev *sdev = scifdev->sdev;
|
||||
|
||||
if (scifdev_self(scifdev))
|
||||
out_virt = phys_to_virt(phys);
|
||||
else
|
||||
out_virt = (void __force *)
|
||||
sdev->hw_ops->ioremap(sdev, phys, size);
|
||||
return out_virt;
|
||||
}
|
||||
|
||||
static __always_inline void
|
||||
scif_iounmap(void *virt, size_t len, struct scif_dev *scifdev)
|
||||
{
|
||||
if (!scifdev_self(scifdev)) {
|
||||
struct scif_hw_dev *sdev = scifdev->sdev;
|
||||
|
||||
sdev->hw_ops->iounmap(sdev, (void __force __iomem *)virt);
|
||||
}
|
||||
}
|
||||
#endif /* SCIF_MAP_H */
|
||||
Loading…
Reference in New Issue
Block a user