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a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
221 lines
6.9 KiB
C
221 lines
6.9 KiB
C
/*
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* Copyright IBM Corp. 2006
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* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Ralph Wuerthner <rwuerthn@de.ibm.com>
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* Felix Beck <felix.beck@de.ibm.com>
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* Holger Dengler <hd@linux.vnet.ibm.com>
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*
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* Adjunct processor bus header file.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _AP_BUS_H_
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#define _AP_BUS_H_
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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#include <linux/types.h>
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#define AP_DEVICES 64 /* Number of AP devices. */
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#define AP_DOMAINS 16 /* Number of AP domains. */
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#define AP_MAX_RESET 90 /* Maximum number of resets. */
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#define AP_RESET_TIMEOUT (HZ/2) /* Time in ticks for reset timeouts. */
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#define AP_CONFIG_TIME 30 /* Time in seconds between AP bus rescans. */
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#define AP_POLL_TIME 1 /* Time in ticks between receive polls. */
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extern int ap_domain_index;
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/**
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* The ap_qid_t identifier of an ap queue. It contains a
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* 6 bit device index and a 4 bit queue index (domain).
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*/
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typedef unsigned int ap_qid_t;
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#define AP_MKQID(_device,_queue) (((_device) & 63) << 8 | ((_queue) & 15))
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#define AP_QID_DEVICE(_qid) (((_qid) >> 8) & 63)
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#define AP_QID_QUEUE(_qid) ((_qid) & 15)
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/**
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* structy ap_queue_status - Holds the AP queue status.
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* @queue_empty: Shows if queue is empty
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* @replies_waiting: Waiting replies
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* @queue_full: Is 1 if the queue is full
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* @pad: A 4 bit pad
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* @int_enabled: Shows if interrupts are enabled for the AP
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* @response_conde: Holds the 8 bit response code
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* @pad2: A 16 bit pad
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*
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* The ap queue status word is returned by all three AP functions
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* (PQAP, NQAP and DQAP). There's a set of flags in the first
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* byte, followed by a 1 byte response code.
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*/
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struct ap_queue_status {
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unsigned int queue_empty : 1;
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unsigned int replies_waiting : 1;
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unsigned int queue_full : 1;
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unsigned int pad1 : 4;
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unsigned int int_enabled : 1;
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unsigned int response_code : 8;
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unsigned int pad2 : 16;
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} __packed;
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#define AP_QUEUE_STATUS_INVALID \
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{ 1, 1, 1, 0xF, 1, 0xFF, 0xFFFF }
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static inline
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int ap_queue_status_invalid_test(struct ap_queue_status *status)
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{
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struct ap_queue_status invalid = AP_QUEUE_STATUS_INVALID;
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return !(memcmp(status, &invalid, sizeof(struct ap_queue_status)));
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}
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#define MAX_AP_FACILITY 31
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static inline int test_ap_facility(unsigned int function, unsigned int nr)
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{
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if (nr > MAX_AP_FACILITY)
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return 0;
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return function & (unsigned int)(0x80000000 >> nr);
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}
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#define AP_RESPONSE_NORMAL 0x00
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#define AP_RESPONSE_Q_NOT_AVAIL 0x01
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#define AP_RESPONSE_RESET_IN_PROGRESS 0x02
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#define AP_RESPONSE_DECONFIGURED 0x03
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#define AP_RESPONSE_CHECKSTOPPED 0x04
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#define AP_RESPONSE_BUSY 0x05
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#define AP_RESPONSE_INVALID_ADDRESS 0x06
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#define AP_RESPONSE_OTHERWISE_CHANGED 0x07
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#define AP_RESPONSE_Q_FULL 0x10
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#define AP_RESPONSE_NO_PENDING_REPLY 0x10
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#define AP_RESPONSE_INDEX_TOO_BIG 0x11
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#define AP_RESPONSE_NO_FIRST_PART 0x13
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#define AP_RESPONSE_MESSAGE_TOO_BIG 0x15
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#define AP_RESPONSE_REQ_FAC_NOT_INST 0x16
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/*
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* Known device types
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*/
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#define AP_DEVICE_TYPE_PCICC 3
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#define AP_DEVICE_TYPE_PCICA 4
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#define AP_DEVICE_TYPE_PCIXCC 5
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#define AP_DEVICE_TYPE_CEX2A 6
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#define AP_DEVICE_TYPE_CEX2C 7
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#define AP_DEVICE_TYPE_CEX3A 8
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#define AP_DEVICE_TYPE_CEX3C 9
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/*
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* AP reset flag states
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*/
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#define AP_RESET_IGNORE 0 /* request timeout will be ignored */
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#define AP_RESET_ARMED 1 /* request timeout timer is active */
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#define AP_RESET_DO 2 /* AP reset required */
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struct ap_device;
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struct ap_message;
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struct ap_driver {
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struct device_driver driver;
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struct ap_device_id *ids;
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int (*probe)(struct ap_device *);
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void (*remove)(struct ap_device *);
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int request_timeout; /* request timeout in jiffies */
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};
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#define to_ap_drv(x) container_of((x), struct ap_driver, driver)
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int ap_driver_register(struct ap_driver *, struct module *, char *);
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void ap_driver_unregister(struct ap_driver *);
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struct ap_device {
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struct device device;
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struct ap_driver *drv; /* Pointer to AP device driver. */
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spinlock_t lock; /* Per device lock. */
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struct list_head list; /* private list of all AP devices. */
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ap_qid_t qid; /* AP queue id. */
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int queue_depth; /* AP queue depth.*/
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int device_type; /* AP device type. */
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int unregistered; /* marks AP device as unregistered */
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struct timer_list timeout; /* Timer for request timeouts. */
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int reset; /* Reset required after req. timeout. */
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int queue_count; /* # messages currently on AP queue. */
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struct list_head pendingq; /* List of message sent to AP queue. */
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int pendingq_count; /* # requests on pendingq list. */
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struct list_head requestq; /* List of message yet to be sent. */
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int requestq_count; /* # requests on requestq list. */
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int total_request_count; /* # requests ever for this AP device. */
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struct ap_message *reply; /* Per device reply message. */
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void *private; /* ap driver private pointer. */
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};
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#define to_ap_dev(x) container_of((x), struct ap_device, device)
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struct ap_message {
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struct list_head list; /* Request queueing. */
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unsigned long long psmid; /* Message id. */
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void *message; /* Pointer to message buffer. */
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size_t length; /* Message length. */
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void *private; /* ap driver private pointer. */
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unsigned int special:1; /* Used for special commands. */
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/* receive is called from tasklet context */
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void (*receive)(struct ap_device *, struct ap_message *,
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struct ap_message *);
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};
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#define AP_DEVICE(dt) \
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.dev_type=(dt), \
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.match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE,
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/**
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* ap_init_message() - Initialize ap_message.
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* Initialize a message before using. Otherwise this might result in
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* unexpected behaviour.
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*/
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static inline void ap_init_message(struct ap_message *ap_msg)
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{
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ap_msg->psmid = 0;
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ap_msg->length = 0;
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ap_msg->special = 0;
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ap_msg->receive = NULL;
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}
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/*
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* Note: don't use ap_send/ap_recv after using ap_queue_message
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* for the first time. Otherwise the ap message queue will get
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* confused.
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*/
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int ap_send(ap_qid_t, unsigned long long, void *, size_t);
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int ap_recv(ap_qid_t, unsigned long long *, void *, size_t);
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void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
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void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
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void ap_flush_queue(struct ap_device *ap_dev);
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int ap_module_init(void);
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void ap_module_exit(void);
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int ap_4096_commands_available(ap_qid_t qid);
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#endif /* _AP_BUS_H_ */
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