244 строки
7.5 KiB
C
244 строки
7.5 KiB
C
/*
|
|
* 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/mod_devicetable.h>
|
|
#include <linux/types.h>
|
|
|
|
#define AP_DEVICES 64 /* Number of AP devices. */
|
|
#define AP_DOMAINS 256 /* Number of AP domains. */
|
|
#define AP_MAX_RESET 90 /* Maximum number of resets. */
|
|
#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;
|
|
|
|
/**
|
|
* The ap_qid_t identifier of an ap queue. It contains a
|
|
* 6 bit device index and a 4 bit queue index (domain).
|
|
*/
|
|
typedef unsigned int ap_qid_t;
|
|
|
|
#define AP_MKQID(_device, _queue) (((_device) & 63) << 8 | ((_queue) & 255))
|
|
#define AP_QID_DEVICE(_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_conde: 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;
|
|
|
|
#define AP_QUEUE_STATUS_INVALID \
|
|
{ 1, 1, 1, 0xF, 1, 0xFF, 0xFFFF }
|
|
|
|
static inline
|
|
int ap_queue_status_invalid_test(struct ap_queue_status *status)
|
|
{
|
|
struct ap_queue_status invalid = AP_QUEUE_STATUS_INVALID;
|
|
return !(memcmp(status, &invalid, sizeof(struct ap_queue_status)));
|
|
}
|
|
|
|
#define AP_MAX_BITS 31
|
|
static inline int ap_test_bit(unsigned int *ptr, unsigned int nr)
|
|
{
|
|
if (nr > AP_MAX_BITS)
|
|
return 0;
|
|
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
|
|
|
|
/*
|
|
* 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 reset flag states
|
|
*/
|
|
#define AP_RESET_IGNORE 0 /* request timeout will be ignored */
|
|
#define AP_RESET_ARMED 1 /* request timeout timer is active */
|
|
#define AP_RESET_DO 2 /* AP reset required */
|
|
|
|
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 *);
|
|
int request_timeout; /* request timeout in jiffies */
|
|
};
|
|
|
|
#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. */
|
|
spinlock_t lock; /* Per device lock. */
|
|
struct list_head list; /* private list of all AP devices. */
|
|
|
|
ap_qid_t qid; /* AP queue id. */
|
|
int queue_depth; /* AP queue depth.*/
|
|
int device_type; /* AP device type. */
|
|
int raw_hwtype; /* AP raw hardware type. */
|
|
unsigned int functions; /* AP device function bitfield. */
|
|
int unregistered; /* marks AP device as unregistered */
|
|
struct timer_list timeout; /* Timer for request timeouts. */
|
|
int reset; /* Reset required after req. timeout. */
|
|
|
|
int queue_count; /* # messages currently on AP queue. */
|
|
|
|
struct list_head pendingq; /* List of message sent to AP queue. */
|
|
int pendingq_count; /* # requests on pendingq list. */
|
|
struct list_head requestq; /* List of message yet to be sent. */
|
|
int requestq_count; /* # requests on requestq list. */
|
|
int total_request_count; /* # requests ever for this AP device. */
|
|
|
|
struct ap_message *reply; /* Per device reply message. */
|
|
|
|
void *private; /* ap driver private pointer. */
|
|
};
|
|
|
|
#define to_ap_dev(x) container_of((x), struct ap_device, device)
|
|
|
|
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. */
|
|
|
|
void *private; /* ap driver private pointer. */
|
|
unsigned int special:1; /* Used for special commands. */
|
|
/* receive is called from tasklet context */
|
|
void (*receive)(struct ap_device *, 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;
|
|
|
|
#define AP_DEVICE(dt) \
|
|
.dev_type=(dt), \
|
|
.match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE,
|
|
|
|
/**
|
|
* 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->special = 0;
|
|
ap_msg->receive = NULL;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
|
|
void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
|
|
void ap_flush_queue(struct ap_device *ap_dev);
|
|
void ap_bus_force_rescan(void);
|
|
|
|
int ap_module_init(void);
|
|
void ap_module_exit(void);
|
|
|
|
#endif /* _AP_BUS_H_ */
|