cregit-Linux how code gets into the kernel

Release 4.11 drivers/s390/crypto/ap_bus.h

/*
 * 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.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef _AP_BUS_H_

#define _AP_BUS_H_

#include <linux/device.h>
#include <linux/types.h>


#define AP_DEVICES 64		
/* 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;

/**
 * The ap_qid_t identifier of an ap queue. It contains a
 * 6 bit card index and a 4 bit queue index (domain).
 */

typedef unsigned int ap_qid_t;


#define AP_MKQID(_card, _queue) (((_card) & 63) << 8 | ((_queue) & 255))

#define AP_QID_CARD(_qid) (((_qid) >> 8) & 63)

#define AP_QID_QUEUE(_qid) ((_qid) & 255)

/**
 * structy ap_queue_status - Holds the AP queue status.
 * @queue_empty: Shows if queue is empty
 * @replies_waiting: Waiting replies
 * @queue_full: Is 1 if the queue is full
 * @pad: A 4 bit pad
 * @int_enabled: Shows if interrupts are enabled for the AP
 * @response_code: Holds the 8 bit response code
 * @pad2: A 16 bit pad
 *
 * The ap queue status word is returned by all three AP functions
 * (PQAP, NQAP and DQAP).  There's a set of flags in the first
 * byte, followed by a 1 byte response code.
 */

struct ap_queue_status {
	
unsigned int queue_empty	: 1;
	
unsigned int replies_waiting	: 1;
	
unsigned int queue_full		: 1;
	
unsigned int pad1		: 4;
	
unsigned int int_enabled	: 1;
	
unsigned int response_code	: 8;
	
unsigned int pad2		: 16;
} 
__packed;



static inline int ap_test_bit(unsigned int *ptr, unsigned int nr) { return (*ptr & (0x80000000u >> nr)) != 0; }

Contributors

PersonTokensPropCommitsCommitProp
Holger Dengler30100.00%2100.00%
Total30100.00%2100.00%

#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; struct ap_driver { struct device_driver driver; struct ap_device_id *ids; 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. */ atomic_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. */ int total_request_count; /* # requests ever for this AP device.*/ int request_timeout; /* Request timout 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 *); }; struct ap_config_info { unsigned int special_command:1; unsigned int ap_extended:1; unsigned char reserved1:6; unsigned char reserved2[15]; unsigned int apm[8]; /* AP ID mask */ unsigned int aqm[8]; /* AP queue mask */ unsigned int adm[8]; /* AP domain mask */ unsigned char reserved4[16]; } __packed; /** * 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) { ap_msg->psmid = 0; ap_msg->length = 0; ap_msg->rc = 0; ap_msg->special = 0; ap_msg->receive = NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Felix Beck3071.43%250.00%
Holger Dengler614.29%125.00%
Martin Schwidefsky614.29%125.00%
Total42100.00%4100.00%

#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(unsigned long data); 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); struct ap_card *ap_card_create(int id, int queue_depth, int device_type, unsigned int device_functions); int ap_module_init(void); void ap_module_exit(void); #endif /* _AP_BUS_H_ */

Overall Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky45044.25%311.54%
Ingo Tuchscherer33532.94%830.77%
Holger Dengler15114.85%623.08%
Felix Beck616.00%519.23%
Ralph Wuerthner161.57%311.54%
Harald Freudenberger40.39%13.85%
Total1017100.00%26100.00%
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