Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 392 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..0f1793395
--- /dev/null
+++ b/drivers/s390/crypto/ap_bus.h
@@ -0,0 +1,392 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright IBM Corp. 2006, 2019
+ * 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 <linux/hashtable.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_IOCTLS  256		/* Number of ioctls. */
+#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. */
+#define AP_DEFAULT_MAX_MSG_SIZE (12 * 1024)
+#define AP_TAPQ_ML_FIELD_CHUNK_SIZE (4096)
+
+extern int ap_domain_index;
+extern atomic_t ap_max_msg_size;
+
+extern DECLARE_HASHTABLE(ap_queues, 8);
+extern spinlock_t ap_queues_lock;
+
+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_INVALID_GISA	0x08
+#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
+#define AP_RESPONSE_INVALID_DOMAIN	0x42
+
+/*
+ * 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
+#define AP_DEVICE_TYPE_CEX7	13
+#define AP_DEVICE_TYPE_CEX8	14
+
+/*
+ * 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 queue state machine states
+ */
+enum ap_sm_state {
+	AP_SM_STATE_RESET_START = 0,
+	AP_SM_STATE_RESET_WAIT,
+	AP_SM_STATE_SETIRQ_WAIT,
+	AP_SM_STATE_IDLE,
+	AP_SM_STATE_WORKING,
+	AP_SM_STATE_QUEUE_FULL,
+	NR_AP_SM_STATES
+};
+
+/*
+ * AP queue state machine events
+ */
+enum ap_sm_event {
+	AP_SM_EVENT_POLL,
+	AP_SM_EVENT_TIMEOUT,
+	NR_AP_SM_EVENTS
+};
+
+/*
+ * AP queue state wait behaviour
+ */
+enum ap_sm_wait {
+	AP_SM_WAIT_AGAIN = 0,	/* retry immediately */
+	AP_SM_WAIT_TIMEOUT,	/* wait for timeout */
+	AP_SM_WAIT_INTERRUPT,	/* wait for thin interrupt (if available) */
+	AP_SM_WAIT_NONE,	/* no wait */
+	NR_AP_SM_WAIT
+};
+
+/*
+ * AP queue device states
+ */
+enum ap_dev_state {
+	AP_DEV_STATE_UNINITIATED = 0,	/* fresh and virgin, not touched */
+	AP_DEV_STATE_OPERATING,		/* queue dev is working normal */
+	AP_DEV_STATE_SHUTDOWN,		/* remove/unbind/shutdown in progress */
+	AP_DEV_STATE_ERROR,		/* device is in error state */
+	NR_AP_DEV_STATES
+};
+
+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 *);
+	int (*in_use)(unsigned long *apm, unsigned long *aqm);
+	/*
+	 * Called at the start of the ap bus scan function when
+	 * the crypto config information (qci) has changed.
+	 * This callback is not invoked if there is no AP
+	 * QCI support available.
+	 */
+	void (*on_config_changed)(struct ap_config_info *new_config_info,
+				  struct ap_config_info *old_config_info);
+	/*
+	 * Called at the end of the ap bus scan function when
+	 * the crypto config information (qci) has changed.
+	 * This callback is not invoked if there is no AP
+	 * QCI support available.
+	 */
+	void (*on_scan_complete)(struct ap_config_info *new_config_info,
+				 struct ap_config_info *old_config_info);
+};
+
+#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;
+	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;
+	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. */
+	unsigned int maxmsgsize;	/* AP msg limit for this card */
+	bool config;			/* configured state */
+	bool chkstop;			/* checkstop state */
+	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 hlist_node hnode;	/* Node for the ap_queues hashtable */
+	struct ap_card *card;		/* Ptr to assoc. AP card. */
+	spinlock_t lock;		/* Per device lock. */
+	enum ap_dev_state dev_state;	/* queue device state */
+	bool config;			/* configured state */
+	bool chkstop;			/* checkstop state */
+	ap_qid_t qid;			/* AP queue id. */
+	bool interrupt;			/* indicate if interrupts are enabled */
+	int queue_count;		/* # messages currently on AP queue. */
+	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. */
+	enum ap_sm_state sm_state;	/* ap queue state machine state */
+	int last_err_rc;		/* last error state response code */
+};
+
+#define to_ap_queue(x) container_of((x), struct ap_queue, ap_dev.device)
+
+typedef enum ap_sm_wait (ap_func_t)(struct ap_queue *queue);
+
+/* failure injection cmd struct */
+struct ap_fi {
+	union {
+		u16 cmd;		/* fi flags + action */
+		struct {
+			u8 flags;	/* fi flags only */
+			u8 action;	/* fi action only */
+		};
+	};
+};
+
+/* all currently known fi actions */
+enum ap_fi_actions {
+	AP_FI_ACTION_CCA_AGENT_FF   = 0x01,
+	AP_FI_ACTION_CCA_DOM_INVAL  = 0x02,
+	AP_FI_ACTION_NQAP_QID_INVAL = 0x03,
+};
+
+/* all currently known fi flags */
+enum ap_fi_flags {
+	AP_FI_FLAG_NO_RETRY	  = 0x01,
+	AP_FI_FLAG_TOGGLE_SPECIAL = 0x02,
+};
+
+struct ap_message {
+	struct list_head list;		/* Request queueing. */
+	unsigned long long psmid;	/* Message id. */
+	void *msg;			/* Pointer to message buffer. */
+	unsigned int len;		/* actual msg len in msg buffer */
+	unsigned int bufsize;		/* allocated msg buffer size */
+	u16 flags;			/* Flags, see AP_MSG_FLAG_xxx */
+	struct ap_fi fi;		/* Failure Injection cmd */
+	int rc;				/* Return code for this message */
+	void *private;			/* ap driver private pointer. */
+	/* receive is called from tasklet context */
+	void (*receive)(struct ap_queue *, struct ap_message *,
+			struct ap_message *);
+};
+
+#define AP_MSG_FLAG_SPECIAL  0x0001	/* flag msg as 'special' with NQAP */
+#define AP_MSG_FLAG_USAGE    0x0002	/* CCA, EP11: usage (no admin) msg */
+#define AP_MSG_FLAG_ADMIN    0x0004	/* CCA, EP11: admin (=control) msg */
+
+/**
+ * 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)
+{
+	kfree_sensitive(ap_msg->msg);
+	kfree_sensitive(ap_msg->private);
+}
+
+/*
+ * 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_sm_wait ap_sm_event(struct ap_queue *aq, enum ap_sm_event event);
+enum ap_sm_wait ap_sm_event_loop(struct ap_queue *aq, enum ap_sm_event event);
+
+int 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_sm_wait wait);
+void ap_request_timeout(struct timer_list *t);
+void ap_bus_force_rescan(void);
+
+int ap_test_config_usage_domain(unsigned int domain);
+int ap_test_config_ctrl_domain(unsigned int domain);
+
+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_prepare_remove(struct ap_queue *aq);
+void ap_queue_remove(struct ap_queue *aq);
+void ap_queue_init_state(struct ap_queue *aq);
+
+struct ap_card *ap_card_create(int id, int queue_depth, int raw_type,
+			       int comp_type, unsigned int functions, int ml);
+
+#define APMASKSIZE (BITS_TO_LONGS(AP_DEVICES) * sizeof(unsigned long))
+#define AQMASKSIZE (BITS_TO_LONGS(AP_DOMAINS) * sizeof(unsigned long))
+
+struct ap_perms {
+	unsigned long ioctlm[BITS_TO_LONGS(AP_IOCTLS)];
+	unsigned long apm[BITS_TO_LONGS(AP_DEVICES)];
+	unsigned long aqm[BITS_TO_LONGS(AP_DOMAINS)];
+	unsigned long adm[BITS_TO_LONGS(AP_DOMAINS)];
+};
+
+extern struct ap_perms ap_perms;
+extern struct mutex ap_perms_mutex;
+
+/*
+ * Get ap_queue device for this qid.
+ * Returns ptr to the struct ap_queue device or NULL if there
+ * was no ap_queue device with this qid found. When something is
+ * found, the reference count of the embedded device is increased.
+ * So the caller has to decrease the reference count after use
+ * with a call to put_device(&aq->ap_dev.device).
+ */
+struct ap_queue *ap_get_qdev(ap_qid_t qid);
+
+/*
+ * 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);
+
+/*
+ * ap_parse_mask_str() - helper function to parse a bitmap string
+ * and clear/set the bits in the bitmap accordingly. The string may be
+ * given as absolute value, a hex string like 0x1F2E3D4C5B6A" simple
+ * overwriting the current content of the bitmap. Or as relative string
+ * like "+1-16,-32,-0x40,+128" where only single bits or ranges of
+ * bits are cleared or set. Distinction is done based on the very
+ * first character which may be '+' or '-' for the relative string
+ * and othewise assume to be an absolute value string. If parsing fails
+ * a negative errno value is returned. All arguments and bitmaps are
+ * big endian order.
+ */
+int ap_parse_mask_str(const char *str,
+		      unsigned long *bitmap, int bits,
+		      struct mutex *lock);
+
+/*
+ * Interface to wait for the AP bus to have done one initial ap bus
+ * scan and all detected APQNs have been bound to device drivers.
+ * If these both conditions are not fulfilled, this function blocks
+ * on a condition with wait_for_completion_killable_timeout().
+ * If these both conditions are fulfilled (before the timeout hits)
+ * the return value is 0. If the timeout (in jiffies) hits instead
+ * -ETIME is returned. On failures negative return values are
+ * returned to the caller.
+ */
+int ap_wait_init_apqn_bindings_complete(unsigned long timeout);
+
+void ap_send_config_uevent(struct ap_device *ap_dev, bool cfg);
+void ap_send_online_uevent(struct ap_device *ap_dev, int online);
+
+#endif /* _AP_BUS_H_ */