Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 284 insertions, 0 deletions

diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
new file mode 100644
index 000000000..1c799ddd9
--- /dev/null
+++ b/drivers/s390/crypto/ap_bus.h
@@ -0,0 +1,284 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright IBM Corp. 2006, 2012
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *	      Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *	      Ralph Wuerthner <rwuerthn@de.ibm.com>
+ *	      Felix Beck <felix.beck@de.ibm.com>
+ *	      Holger Dengler <hd@linux.vnet.ibm.com>
+ *
+ * Adjunct processor bus header file.
+ */
+
+#ifndef _AP_BUS_H_
+#define _AP_BUS_H_
+
+#include <linux/device.h>
+#include <linux/types.h>
+#include <asm/isc.h>
+#include <asm/ap.h>
+
+#define AP_DEVICES 256		/* Number of AP devices. */
+#define AP_DOMAINS 256		/* Number of AP domains. */
+#define AP_RESET_TIMEOUT (HZ*0.7)	/* Time in ticks for reset timeouts. */
+#define AP_CONFIG_TIME 30	/* Time in seconds between AP bus rescans. */
+#define AP_POLL_TIME 1		/* Time in ticks between receive polls. */
+
+extern int ap_domain_index;
+
+extern spinlock_t ap_list_lock;
+extern struct list_head ap_card_list;
+
+static inline int ap_test_bit(unsigned int *ptr, unsigned int nr)
+{
+	return (*ptr & (0x80000000u >> nr)) != 0;
+}
+
+#define AP_RESPONSE_NORMAL		0x00
+#define AP_RESPONSE_Q_NOT_AVAIL		0x01
+#define AP_RESPONSE_RESET_IN_PROGRESS	0x02
+#define AP_RESPONSE_DECONFIGURED	0x03
+#define AP_RESPONSE_CHECKSTOPPED	0x04
+#define AP_RESPONSE_BUSY		0x05
+#define AP_RESPONSE_INVALID_ADDRESS	0x06
+#define AP_RESPONSE_OTHERWISE_CHANGED	0x07
+#define AP_RESPONSE_Q_FULL		0x10
+#define AP_RESPONSE_NO_PENDING_REPLY	0x10
+#define AP_RESPONSE_INDEX_TOO_BIG	0x11
+#define AP_RESPONSE_NO_FIRST_PART	0x13
+#define AP_RESPONSE_MESSAGE_TOO_BIG	0x15
+#define AP_RESPONSE_REQ_FAC_NOT_INST	0x16
+
+/*
+ * Known device types
+ */
+#define AP_DEVICE_TYPE_PCICC	3
+#define AP_DEVICE_TYPE_PCICA	4
+#define AP_DEVICE_TYPE_PCIXCC	5
+#define AP_DEVICE_TYPE_CEX2A	6
+#define AP_DEVICE_TYPE_CEX2C	7
+#define AP_DEVICE_TYPE_CEX3A	8
+#define AP_DEVICE_TYPE_CEX3C	9
+#define AP_DEVICE_TYPE_CEX4	10
+#define AP_DEVICE_TYPE_CEX5	11
+#define AP_DEVICE_TYPE_CEX6	12
+
+/*
+ * Known function facilities
+ */
+#define AP_FUNC_MEX4K 1
+#define AP_FUNC_CRT4K 2
+#define AP_FUNC_COPRO 3
+#define AP_FUNC_ACCEL 4
+#define AP_FUNC_EP11  5
+#define AP_FUNC_APXA  6
+
+/*
+ * AP interrupt states
+ */
+#define AP_INTR_DISABLED	0	/* AP interrupt disabled */
+#define AP_INTR_ENABLED		1	/* AP interrupt enabled */
+
+/*
+ * AP device states
+ */
+enum ap_state {
+	AP_STATE_RESET_START,
+	AP_STATE_RESET_WAIT,
+	AP_STATE_SETIRQ_WAIT,
+	AP_STATE_IDLE,
+	AP_STATE_WORKING,
+	AP_STATE_QUEUE_FULL,
+	AP_STATE_SUSPEND_WAIT,
+	AP_STATE_BORKED,
+	NR_AP_STATES
+};
+
+/*
+ * AP device events
+ */
+enum ap_event {
+	AP_EVENT_POLL,
+	AP_EVENT_TIMEOUT,
+	NR_AP_EVENTS
+};
+
+/*
+ * AP wait behaviour
+ */
+enum ap_wait {
+	AP_WAIT_AGAIN,		/* retry immediately */
+	AP_WAIT_TIMEOUT,	/* wait for timeout */
+	AP_WAIT_INTERRUPT,	/* wait for thin interrupt (if available) */
+	AP_WAIT_NONE,		/* no wait */
+	NR_AP_WAIT
+};
+
+struct ap_device;
+struct ap_message;
+
+/*
+ * The ap driver struct includes a flags field which holds some info for
+ * the ap bus about the driver. Currently only one flag is supported and
+ * used: The DEFAULT flag marks an ap driver as a default driver which is
+ * used together with the apmask and aqmask whitelisting of the ap bus.
+ */
+#define AP_DRIVER_FLAG_DEFAULT 0x0001
+
+struct ap_driver {
+	struct device_driver driver;
+	struct ap_device_id *ids;
+	unsigned int flags;
+
+	int (*probe)(struct ap_device *);
+	void (*remove)(struct ap_device *);
+	void (*suspend)(struct ap_device *);
+	void (*resume)(struct ap_device *);
+};
+
+#define to_ap_drv(x) container_of((x), struct ap_driver, driver)
+
+int ap_driver_register(struct ap_driver *, struct module *, char *);
+void ap_driver_unregister(struct ap_driver *);
+
+struct ap_device {
+	struct device device;
+	struct ap_driver *drv;		/* Pointer to AP device driver. */
+	int device_type;		/* AP device type. */
+};
+
+#define to_ap_dev(x) container_of((x), struct ap_device, device)
+
+struct ap_card {
+	struct ap_device ap_dev;
+	struct list_head list;		/* Private list of AP cards. */
+	struct list_head queues;	/* List of assoc. AP queues */
+	void *private;			/* ap driver private pointer. */
+	int raw_hwtype;			/* AP raw hardware type. */
+	unsigned int functions;		/* AP device function bitfield. */
+	int queue_depth;		/* AP queue depth.*/
+	int id;				/* AP card number. */
+	atomic64_t total_request_count;	/* # requests ever for this AP device.*/
+};
+
+#define to_ap_card(x) container_of((x), struct ap_card, ap_dev.device)
+
+struct ap_queue {
+	struct ap_device ap_dev;
+	struct list_head list;		/* Private list of AP queues. */
+	struct ap_card *card;		/* Ptr to assoc. AP card. */
+	spinlock_t lock;		/* Per device lock. */
+	void *private;			/* ap driver private pointer. */
+	ap_qid_t qid;			/* AP queue id. */
+	int interrupt;			/* indicate if interrupts are enabled */
+	int queue_count;		/* # messages currently on AP queue. */
+	enum ap_state state;		/* State of the AP device. */
+	int pendingq_count;		/* # requests on pendingq list. */
+	int requestq_count;		/* # requests on requestq list. */
+	u64 total_request_count;	/* # requests ever for this AP device.*/
+	int request_timeout;		/* Request timeout in jiffies. */
+	struct timer_list timeout;	/* Timer for request timeouts. */
+	struct list_head pendingq;	/* List of message sent to AP queue. */
+	struct list_head requestq;	/* List of message yet to be sent. */
+	struct ap_message *reply;	/* Per device reply message. */
+};
+
+#define to_ap_queue(x) container_of((x), struct ap_queue, ap_dev.device)
+
+typedef enum ap_wait (ap_func_t)(struct ap_queue *queue);
+
+struct ap_message {
+	struct list_head list;		/* Request queueing. */
+	unsigned long long psmid;	/* Message id. */
+	void *message;			/* Pointer to message buffer. */
+	size_t length;			/* Message length. */
+	int rc;				/* Return code for this message */
+
+	void *private;			/* ap driver private pointer. */
+	unsigned int special:1;		/* Used for special commands. */
+	/* receive is called from tasklet context */
+	void (*receive)(struct ap_queue *, struct ap_message *,
+			struct ap_message *);
+};
+
+/**
+ * ap_init_message() - Initialize ap_message.
+ * Initialize a message before using. Otherwise this might result in
+ * unexpected behaviour.
+ */
+static inline void ap_init_message(struct ap_message *ap_msg)
+{
+	memset(ap_msg, 0, sizeof(*ap_msg));
+}
+
+/**
+ * ap_release_message() - Release ap_message.
+ * Releases all memory used internal within the ap_message struct
+ * Currently this is the message and private field.
+ */
+static inline void ap_release_message(struct ap_message *ap_msg)
+{
+	kzfree(ap_msg->message);
+	kzfree(ap_msg->private);
+}
+
+#define for_each_ap_card(_ac) \
+	list_for_each_entry(_ac, &ap_card_list, list)
+
+#define for_each_ap_queue(_aq, _ac) \
+	list_for_each_entry(_aq, &(_ac)->queues, list)
+
+/*
+ * Note: don't use ap_send/ap_recv after using ap_queue_message
+ * for the first time. Otherwise the ap message queue will get
+ * confused.
+ */
+int ap_send(ap_qid_t, unsigned long long, void *, size_t);
+int ap_recv(ap_qid_t, unsigned long long *, void *, size_t);
+
+enum ap_wait ap_sm_event(struct ap_queue *aq, enum ap_event event);
+enum ap_wait ap_sm_event_loop(struct ap_queue *aq, enum ap_event event);
+
+void ap_queue_message(struct ap_queue *aq, struct ap_message *ap_msg);
+void ap_cancel_message(struct ap_queue *aq, struct ap_message *ap_msg);
+void ap_flush_queue(struct ap_queue *aq);
+
+void *ap_airq_ptr(void);
+void ap_wait(enum ap_wait wait);
+void ap_request_timeout(struct timer_list *t);
+void ap_bus_force_rescan(void);
+
+void ap_queue_init_reply(struct ap_queue *aq, struct ap_message *ap_msg);
+struct ap_queue *ap_queue_create(ap_qid_t qid, int device_type);
+void ap_queue_remove(struct ap_queue *aq);
+void ap_queue_suspend(struct ap_device *ap_dev);
+void ap_queue_resume(struct ap_device *ap_dev);
+void ap_queue_reinit_state(struct ap_queue *aq);
+
+struct ap_card *ap_card_create(int id, int queue_depth, int raw_device_type,
+			       int comp_device_type, unsigned int functions);
+
+/*
+ * check APQN for owned/reserved by ap bus and default driver(s).
+ * Checks if this APQN is or will be in use by the ap bus
+ * and the default set of drivers.
+ * If yes, returns 1, if not returns 0. On error a negative
+ * errno value is returned.
+ */
+int ap_owned_by_def_drv(int card, int queue);
+
+/*
+ * check 'matrix' of APQNs for owned/reserved by ap bus and
+ * default driver(s).
+ * Checks if there is at least one APQN in the given 'matrix'
+ * marked as owned/reserved by the ap bus and default driver(s).
+ * If such an APQN is found the return value is 1, otherwise
+ * 0 is returned. On error a negative errno value is returned.
+ * The parameter apm is a bitmask which should be declared
+ * as DECLARE_BITMAP(apm, AP_DEVICES), the aqm parameter is
+ * similar, should be declared as DECLARE_BITMAP(aqm, AP_DOMAINS).
+ */
+int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm,
+				       unsigned long *aqm);
+
+#endif /* _AP_BUS_H_ */