Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 312 insertions, 0 deletions

diff --git a/drivers/crypto/ccp/sp-dev.c b/drivers/crypto/ccp/sp-dev.c
new file mode 100644
index 000000000..e0459002e
--- /dev/null
+++ b/drivers/crypto/ccp/sp-dev.c
@@ -0,0 +1,312 @@
+/*
+ * AMD Secure Processor driver
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * Author: Tom Lendacky <thomas.lendacky@amd.com>
+ * Author: Gary R Hook <gary.hook@amd.com>
+ * Author: Brijesh Singh <brijesh.singh@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>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/spinlock_types.h>
+#include <linux/types.h>
+#include <linux/ccp.h>
+
+#include "ccp-dev.h"
+#include "sp-dev.h"
+
+MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@amd.com>");
+MODULE_AUTHOR("Gary R Hook <gary.hook@amd.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.1.0");
+MODULE_DESCRIPTION("AMD Secure Processor driver");
+
+/* List of SPs, SP count, read-write access lock, and access functions
+ *
+ * Lock structure: get sp_unit_lock for reading whenever we need to
+ * examine the SP list.
+ */
+static DEFINE_RWLOCK(sp_unit_lock);
+static LIST_HEAD(sp_units);
+
+/* Ever-increasing value to produce unique unit numbers */
+static atomic_t sp_ordinal;
+
+static void sp_add_device(struct sp_device *sp)
+{
+	unsigned long flags;
+
+	write_lock_irqsave(&sp_unit_lock, flags);
+
+	list_add_tail(&sp->entry, &sp_units);
+
+	write_unlock_irqrestore(&sp_unit_lock, flags);
+}
+
+static void sp_del_device(struct sp_device *sp)
+{
+	unsigned long flags;
+
+	write_lock_irqsave(&sp_unit_lock, flags);
+
+	list_del(&sp->entry);
+
+	write_unlock_irqrestore(&sp_unit_lock, flags);
+}
+
+static irqreturn_t sp_irq_handler(int irq, void *data)
+{
+	struct sp_device *sp = data;
+
+	if (sp->ccp_irq_handler)
+		sp->ccp_irq_handler(irq, sp->ccp_irq_data);
+
+	if (sp->psp_irq_handler)
+		sp->psp_irq_handler(irq, sp->psp_irq_data);
+
+	return IRQ_HANDLED;
+}
+
+int sp_request_ccp_irq(struct sp_device *sp, irq_handler_t handler,
+		       const char *name, void *data)
+{
+	int ret;
+
+	if ((sp->psp_irq == sp->ccp_irq) && sp->dev_vdata->psp_vdata) {
+		/* Need a common routine to manage all interrupts */
+		sp->ccp_irq_data = data;
+		sp->ccp_irq_handler = handler;
+
+		if (!sp->irq_registered) {
+			ret = request_irq(sp->ccp_irq, sp_irq_handler, 0,
+					  sp->name, sp);
+			if (ret)
+				return ret;
+
+			sp->irq_registered = true;
+		}
+	} else {
+		/* Each sub-device can manage it's own interrupt */
+		ret = request_irq(sp->ccp_irq, handler, 0, name, data);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+int sp_request_psp_irq(struct sp_device *sp, irq_handler_t handler,
+		       const char *name, void *data)
+{
+	int ret;
+
+	if ((sp->psp_irq == sp->ccp_irq) && sp->dev_vdata->ccp_vdata) {
+		/* Need a common routine to manage all interrupts */
+		sp->psp_irq_data = data;
+		sp->psp_irq_handler = handler;
+
+		if (!sp->irq_registered) {
+			ret = request_irq(sp->psp_irq, sp_irq_handler, 0,
+					  sp->name, sp);
+			if (ret)
+				return ret;
+
+			sp->irq_registered = true;
+		}
+	} else {
+		/* Each sub-device can manage it's own interrupt */
+		ret = request_irq(sp->psp_irq, handler, 0, name, data);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+void sp_free_ccp_irq(struct sp_device *sp, void *data)
+{
+	if ((sp->psp_irq == sp->ccp_irq) && sp->dev_vdata->psp_vdata) {
+		/* Using common routine to manage all interrupts */
+		if (!sp->psp_irq_handler) {
+			/* Nothing else using it, so free it */
+			free_irq(sp->ccp_irq, sp);
+
+			sp->irq_registered = false;
+		}
+
+		sp->ccp_irq_handler = NULL;
+		sp->ccp_irq_data = NULL;
+	} else {
+		/* Each sub-device can manage it's own interrupt */
+		free_irq(sp->ccp_irq, data);
+	}
+}
+
+void sp_free_psp_irq(struct sp_device *sp, void *data)
+{
+	if ((sp->psp_irq == sp->ccp_irq) && sp->dev_vdata->ccp_vdata) {
+		/* Using common routine to manage all interrupts */
+		if (!sp->ccp_irq_handler) {
+			/* Nothing else using it, so free it */
+			free_irq(sp->psp_irq, sp);
+
+			sp->irq_registered = false;
+		}
+
+		sp->psp_irq_handler = NULL;
+		sp->psp_irq_data = NULL;
+	} else {
+		/* Each sub-device can manage it's own interrupt */
+		free_irq(sp->psp_irq, data);
+	}
+}
+
+/**
+ * sp_alloc_struct - allocate and initialize the sp_device struct
+ *
+ * @dev: device struct of the SP
+ */
+struct sp_device *sp_alloc_struct(struct device *dev)
+{
+	struct sp_device *sp;
+
+	sp = devm_kzalloc(dev, sizeof(*sp), GFP_KERNEL);
+	if (!sp)
+		return NULL;
+
+	sp->dev = dev;
+	sp->ord = atomic_inc_return(&sp_ordinal);
+	snprintf(sp->name, SP_MAX_NAME_LEN, "sp-%u", sp->ord);
+
+	return sp;
+}
+
+int sp_init(struct sp_device *sp)
+{
+	sp_add_device(sp);
+
+	if (sp->dev_vdata->ccp_vdata)
+		ccp_dev_init(sp);
+
+	if (sp->dev_vdata->psp_vdata)
+		psp_dev_init(sp);
+	return 0;
+}
+
+void sp_destroy(struct sp_device *sp)
+{
+	if (sp->dev_vdata->ccp_vdata)
+		ccp_dev_destroy(sp);
+
+	if (sp->dev_vdata->psp_vdata)
+		psp_dev_destroy(sp);
+
+	sp_del_device(sp);
+}
+
+#ifdef CONFIG_PM
+int sp_suspend(struct sp_device *sp, pm_message_t state)
+{
+	int ret;
+
+	if (sp->dev_vdata->ccp_vdata) {
+		ret = ccp_dev_suspend(sp, state);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+int sp_resume(struct sp_device *sp)
+{
+	int ret;
+
+	if (sp->dev_vdata->ccp_vdata) {
+		ret = ccp_dev_resume(sp);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+#endif
+
+struct sp_device *sp_get_psp_master_device(void)
+{
+	struct sp_device *i, *ret = NULL;
+	unsigned long flags;
+
+	write_lock_irqsave(&sp_unit_lock, flags);
+	if (list_empty(&sp_units))
+		goto unlock;
+
+	list_for_each_entry(i, &sp_units, entry) {
+		if (i->psp_data && i->get_psp_master_device) {
+			ret = i->get_psp_master_device();
+			break;
+		}
+	}
+
+unlock:
+	write_unlock_irqrestore(&sp_unit_lock, flags);
+	return ret;
+}
+
+static int __init sp_mod_init(void)
+{
+#ifdef CONFIG_X86
+	int ret;
+
+	ret = sp_pci_init();
+	if (ret)
+		return ret;
+
+#ifdef CONFIG_CRYPTO_DEV_SP_PSP
+	psp_pci_init();
+#endif
+
+	return 0;
+#endif
+
+#ifdef CONFIG_ARM64
+	int ret;
+
+	ret = sp_platform_init();
+	if (ret)
+		return ret;
+
+	return 0;
+#endif
+
+	return -ENODEV;
+}
+
+static void __exit sp_mod_exit(void)
+{
+#ifdef CONFIG_X86
+
+#ifdef CONFIG_CRYPTO_DEV_SP_PSP
+	psp_pci_exit();
+#endif
+
+	sp_pci_exit();
+#endif
+
+#ifdef CONFIG_ARM64
+	sp_platform_exit();
+#endif
+}
+
+module_init(sp_mod_init);
+module_exit(sp_mod_exit);