From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/drivers/crypto/ccp/ccp-dev.c | 53 ++++++++++++++++++++++++++++++++++++++++++-----------
1 files changed, 42 insertions(+), 11 deletions(-)
diff --git a/kernel/drivers/crypto/ccp/ccp-dev.c b/kernel/drivers/crypto/ccp/ccp-dev.c
index b8c94a0..0971ee6 100644
--- a/kernel/drivers/crypto/ccp/ccp-dev.c
+++ b/kernel/drivers/crypto/ccp/ccp-dev.c
@@ -1,16 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* AMD Cryptographic Coprocessor (CCP) driver
*
- * Copyright (C) 2013,2017 Advanced Micro Devices, Inc.
+ * Copyright (C) 2013,2019 Advanced Micro Devices, Inc.
*
* Author: Tom Lendacky <thomas.lendacky@amd.com>
* Author: Gary R Hook <gary.hook@amd.com>
- *
- * 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.
*/
+#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/sched.h>
@@ -22,12 +20,26 @@
#include <linux/delay.h>
#include <linux/hw_random.h>
#include <linux/cpu.h>
+#include <linux/atomic.h>
#ifdef CONFIG_X86
#include <asm/cpu_device_id.h>
#endif
#include <linux/ccp.h>
#include "ccp-dev.h"
+
+#define MAX_CCPS 32
+
+/* Limit CCP use to a specifed number of queues per device */
+static unsigned int nqueues = 0;
+module_param(nqueues, uint, 0444);
+MODULE_PARM_DESC(nqueues, "Number of queues per CCP (minimum 1; default: all available)");
+
+/* Limit the maximum number of configured CCPs */
+static atomic_t dev_count = ATOMIC_INIT(0);
+static unsigned int max_devs = MAX_CCPS;
+module_param(max_devs, uint, 0444);
+MODULE_PARM_DESC(max_devs, "Maximum number of CCPs to enable (default: all; 0 disables all CCPs)");
struct ccp_tasklet_data {
struct completion completion;
@@ -519,7 +531,6 @@
return len;
}
-#ifdef CONFIG_PM
bool ccp_queues_suspended(struct ccp_device *ccp)
{
unsigned int suspended = 0;
@@ -537,7 +548,7 @@
return ccp->cmd_q_count == suspended;
}
-int ccp_dev_suspend(struct sp_device *sp, pm_message_t state)
+int ccp_dev_suspend(struct sp_device *sp)
{
struct ccp_device *ccp = sp->ccp_data;
unsigned long flags;
@@ -589,7 +600,6 @@
return 0;
}
-#endif
int ccp_dev_init(struct sp_device *sp)
{
@@ -597,11 +607,23 @@
struct ccp_device *ccp;
int ret;
+ /*
+ * Check how many we have so far, and stop after reaching
+ * that number
+ */
+ if (atomic_inc_return(&dev_count) > max_devs)
+ return 0; /* don't fail the load */
+
ret = -ENOMEM;
ccp = ccp_alloc_struct(sp);
if (!ccp)
goto e_err;
sp->ccp_data = ccp;
+
+ if (!nqueues || (nqueues > MAX_HW_QUEUES))
+ ccp->max_q_count = MAX_HW_QUEUES;
+ else
+ ccp->max_q_count = nqueues;
ccp->vdata = (struct ccp_vdata *)sp->dev_vdata->ccp_vdata;
if (!ccp->vdata || !ccp->vdata->version) {
@@ -617,18 +639,27 @@
ccp->vdata->setup(ccp);
ret = ccp->vdata->perform->init(ccp);
- if (ret)
+ if (ret) {
+ /* A positive number means that the device cannot be initialized,
+ * but no additional message is required.
+ */
+ if (ret > 0)
+ goto e_quiet;
+
+ /* An unexpected problem occurred, and should be reported in the log */
goto e_err;
+ }
dev_notice(dev, "ccp enabled\n");
return 0;
e_err:
- sp->ccp_data = NULL;
-
dev_notice(dev, "ccp initialization failed\n");
+e_quiet:
+ sp->ccp_data = NULL;
+
return ret;
}
--
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