From ee930fffee469d076998274a2ca55e13dc1efb67 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:54 +0000
Subject: [PATCH] enable tun/tap/iptables
---
kernel/drivers/misc/genwqe/card_ddcb.c | 39 ++++++++++++++++++++-------------------
1 files changed, 20 insertions(+), 19 deletions(-)
diff --git a/kernel/drivers/misc/genwqe/card_ddcb.c b/kernel/drivers/misc/genwqe/card_ddcb.c
index 656449c..0db4000 100644
--- a/kernel/drivers/misc/genwqe/card_ddcb.c
+++ b/kernel/drivers/misc/genwqe/card_ddcb.c
@@ -1,4 +1,5 @@
-/**
+// SPDX-License-Identifier: GPL-2.0-only
+/*
* IBM Accelerator Family 'GenWQE'
*
* (C) Copyright IBM Corp. 2013
@@ -7,15 +8,6 @@
* Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
* Author: Michael Jung <mijung@gmx.net>
* Author: Michael Ruettger <michael@ibmra.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License (version 2 only)
- * 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.
*/
/*
@@ -27,7 +19,6 @@
*/
#include <linux/types.h>
-#include <linux/module.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/pci.h>
@@ -253,10 +244,13 @@
(cd->card_state != GENWQE_CARD_USED);
}
+#define RET_DDCB_APPENDED 1
+#define RET_DDCB_TAPPED 2
/**
* enqueue_ddcb() - Enqueue a DDCB
* @cd: pointer to genwqe device descriptor
* @queue: queue this operation should be done on
+ * @pddcb: pointer to ddcb structure
* @ddcb_no: pointer to ddcb number being tapped
*
* Start execution of DDCB by tapping or append to queue via NEXT
@@ -268,9 +262,6 @@
* Return: 1 if new DDCB is appended to previous
* 2 if DDCB queue is tapped via register/simulation
*/
-#define RET_DDCB_APPENDED 1
-#define RET_DDCB_TAPPED 2
-
static int enqueue_ddcb(struct genwqe_dev *cd, struct ddcb_queue *queue,
struct ddcb *pddcb, int ddcb_no)
{
@@ -325,6 +316,8 @@
/**
* copy_ddcb_results() - Copy output state from real DDCB to request
+ * @req: pointer to requsted DDCB parameters
+ * @ddcb_no: pointer to ddcb number being tapped
*
* Copy DDCB ASV to request struct. There is no endian
* conversion made, since data structure in ASV is still
@@ -365,6 +358,7 @@
/**
* genwqe_check_ddcb_queue() - Checks DDCB queue for completed work equests.
* @cd: pointer to genwqe device descriptor
+ * @queue: queue to be checked
*
* Return: Number of DDCBs which were finished
*/
@@ -562,6 +556,8 @@
/**
* get_next_ddcb() - Get next available DDCB
* @cd: pointer to genwqe device descriptor
+ * @queue: DDCB queue
+ * @num: internal DDCB number
*
* DDCB's content is completely cleared but presets for PRE and
* SEQNUM. This function must only be called when ddcb_lock is held.
@@ -909,7 +905,7 @@
/**
* __genwqe_execute_raw_ddcb() - Setup and execute DDCB
* @cd: pointer to genwqe device descriptor
- * @req: user provided DDCB request
+ * @cmd: user provided DDCB command
* @f_flags: file mode: blocking, non-blocking
*/
int __genwqe_execute_raw_ddcb(struct genwqe_dev *cd,
@@ -974,6 +970,7 @@
/**
* genwqe_next_ddcb_ready() - Figure out if the next DDCB is already finished
+ * @cd: pointer to genwqe device descriptor
*
* We use this as condition for our wait-queue code.
*/
@@ -1002,6 +999,7 @@
/**
* genwqe_ddcbs_in_flight() - Check how many DDCBs are in flight
+ * @cd: pointer to genwqe device descriptor
*
* Keep track on the number of DDCBs which ware currently in the
* queue. This is needed for statistics as well as conditon if we want
@@ -1093,7 +1091,7 @@
queue->ddcb_daddr);
queue->ddcb_vaddr = NULL;
queue->ddcb_daddr = 0ull;
- return -ENODEV;
+ return rc;
}
@@ -1180,6 +1178,7 @@
/**
* genwqe_card_thread() - Work thread for the DDCB queue
+ * @data: pointer to genwqe device descriptor
*
* The idea is to check if there are DDCBs in processing. If there are
* some finished DDCBs, we process them and wakeup the
@@ -1188,7 +1187,7 @@
*/
static int genwqe_card_thread(void *data)
{
- int should_stop = 0, rc = 0;
+ int should_stop = 0;
struct genwqe_dev *cd = (struct genwqe_dev *)data;
while (!kthread_should_stop()) {
@@ -1196,12 +1195,12 @@
genwqe_check_ddcb_queue(cd, &cd->queue);
if (GENWQE_POLLING_ENABLED) {
- rc = wait_event_interruptible_timeout(
+ wait_event_interruptible_timeout(
cd->queue_waitq,
genwqe_ddcbs_in_flight(cd) ||
(should_stop = kthread_should_stop()), 1);
} else {
- rc = wait_event_interruptible_timeout(
+ wait_event_interruptible_timeout(
cd->queue_waitq,
genwqe_next_ddcb_ready(cd) ||
(should_stop = kthread_should_stop()), HZ);
@@ -1308,6 +1307,7 @@
/**
* queue_wake_up_all() - Handles fatal error case
+ * @cd: pointer to genwqe device descriptor
*
* The PCI device got unusable and we have to stop all pending
* requests as fast as we can. The code after this must purge the
@@ -1332,6 +1332,7 @@
/**
* genwqe_finish_queue() - Remove any genwqe devices and user-interfaces
+ * @cd: pointer to genwqe device descriptor
*
* Relies on the pre-condition that there are no users of the card
* device anymore e.g. with open file-descriptors.
--
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