/*
 * Copyright IBM Corp. 1999,2012
 *
 * Author(s): Martin Peschke <mpeschke@de.ibm.com>
 *            Martin Schwidefsky <schwidefsky@de.ibm.com>
 */

#ifndef __SCLP_H__
#define __SCLP_H__

#include <linux/types.h>
#include <linux/list.h>
#include <asm/sclp.h>
#include <asm/ebcdic.h>

/* maximum number of pages concerning our own memory management */
#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
#define SCLP_CONSOLE_PAGES      6

#define EVTYP_OPCMD             0x01
#define EVTYP_MSG               0x02
#define EVTYP_STATECHANGE       0x08
#define EVTYP_PMSGCMD           0x09
#define EVTYP_CNTLPROGOPCMD     0x20
#define EVTYP_CNTLPROGIDENT     0x0B
#define EVTYP_SIGQUIESCE        0x1D
#define EVTYP_VT220MSG          0x1A
#define EVTYP_CONFMGMDATA       0x04
#define EVTYP_SDIAS             0x1C
#define EVTYP_ASYNC             0x0A
#define EVTYP_OCF               0x1E

#define EVTYP_OPCMD_MASK        0x80000000
#define EVTYP_MSG_MASK          0x40000000
#define EVTYP_STATECHANGE_MASK  0x01000000
#define EVTYP_PMSGCMD_MASK      0x00800000
#define EVTYP_CTLPROGOPCMD_MASK 0x00000001
#define EVTYP_CTLPROGIDENT_MASK 0x00200000
#define EVTYP_SIGQUIESCE_MASK   0x00000008
#define EVTYP_VT220MSG_MASK     0x00000040
#define EVTYP_CONFMGMDATA_MASK  0x10000000
#define EVTYP_SDIAS_MASK        0x00000010
#define EVTYP_ASYNC_MASK        0x00400000
#define EVTYP_OCF_MASK          0x00000004

#define GNRLMSGFLGS_DOM         0x8000
#define GNRLMSGFLGS_SNDALRM     0x4000
#define GNRLMSGFLGS_HOLDMSG     0x2000

#define LNTPFLGS_CNTLTEXT       0x8000
#define LNTPFLGS_LABELTEXT      0x4000
#define LNTPFLGS_DATATEXT       0x2000
#define LNTPFLGS_ENDTEXT        0x1000
#define LNTPFLGS_PROMPTTEXT     0x0800

typedef unsigned int sclp_cmdw_t;

#define SCLP_CMDW_READ_EVENT_DATA       0x00770005
#define SCLP_CMDW_WRITE_EVENT_DATA      0x00760005
#define SCLP_CMDW_WRITE_EVENT_MASK      0x00780005

#define GDS_ID_MDSMU            0x1310
#define GDS_ID_MDSROUTEINFO     0x1311
#define GDS_ID_AGUNWRKCORR      0x1549
#define GDS_ID_SNACONDREPORT    0x1532
#define GDS_ID_CPMSU            0x1212
#define GDS_ID_ROUTTARGINSTR    0x154D
#define GDS_ID_OPREQ            0x8070
#define GDS_ID_TEXTCMD          0x1320

#define GDS_KEY_SELFDEFTEXTMSG  0x31

enum sclp_pm_event {
        SCLP_PM_EVENT_FREEZE,
        SCLP_PM_EVENT_THAW,
        SCLP_PM_EVENT_RESTORE,
};

#define SCLP_PANIC_PRIO         1
#define SCLP_PANIC_PRIO_CLIENT  0

typedef u32 sccb_mask_t;        /* ATTENTION: assumes 32bit mask !!! */

struct sccb_header {
        u16     length;
        u8      function_code;
        u8      control_mask[3];
        u16     response_code;
} __attribute__((packed));

struct init_sccb {
        struct sccb_header header;
        u16 _reserved;
        u16 mask_length;
        sccb_mask_t receive_mask;
        sccb_mask_t send_mask;
        sccb_mask_t sclp_receive_mask;
        sccb_mask_t sclp_send_mask;
} __attribute__((packed));

extern u64 sclp_facilities;

#define SCLP_HAS_CHP_INFO       (sclp_facilities & 0x8000000000000000ULL)
#define SCLP_HAS_CHP_RECONFIG   (sclp_facilities & 0x2000000000000000ULL)
#define SCLP_HAS_CPU_INFO       (sclp_facilities & 0x0800000000000000ULL)
#define SCLP_HAS_CPU_RECONFIG   (sclp_facilities & 0x0400000000000000ULL)
#define SCLP_HAS_PCI_RECONFIG   (sclp_facilities & 0x0000000040000000ULL)


struct gds_subvector {
        u8      length;
        u8      key;
} __attribute__((packed));

struct gds_vector {
        u16     length;
        u16     gds_id;
} __attribute__((packed));

struct evbuf_header {
        u16     length;
        u8      type;
        u8      flags;
        u16     _reserved;
} __attribute__((packed));

struct sclp_req {
        struct list_head list;          /* list_head for request queueing. */
        sclp_cmdw_t command;            /* sclp command to execute */
        void    *sccb;                  /* pointer to the sccb to execute */
        char    status;                 /* status of this request */
        int     start_count;            /* number of SVCs done for this req */
        /* Callback that is called after reaching final status. */
        void (*callback)(struct sclp_req *, void *data);
        void *callback_data;
        int queue_timeout;              /* request queue timeout (sec), set by
                                           caller of sclp_add_request(), if
                                           needed */
        /* Internal fields */
        unsigned long queue_expires;    /* request queue timeout (jiffies) */
};

#define SCLP_REQ_FILLED   0x00  /* request is ready to be processed */
#define SCLP_REQ_QUEUED   0x01  /* request is queued to be processed */
#define SCLP_REQ_RUNNING  0x02  /* request is currently running */
#define SCLP_REQ_DONE     0x03  /* request is completed successfully */
#define SCLP_REQ_FAILED   0x05  /* request is finally failed */
#define SCLP_REQ_QUEUED_TIMEOUT 0x06    /* request on queue timed out */

#define SCLP_QUEUE_INTERVAL 5   /* timeout interval for request queue */

/* function pointers that a high level driver has to use for registration */
/* of some routines it wants to be called from the low level driver */
struct sclp_register {
        struct list_head list;
        /* User wants to receive: */
        sccb_mask_t receive_mask;
        /* User wants to send: */
        sccb_mask_t send_mask;
        /* H/W can receive: */
        sccb_mask_t sclp_receive_mask;
        /* H/W can send: */
        sccb_mask_t sclp_send_mask;
        /* called if event type availability changes */
        void (*state_change_fn)(struct sclp_register *);
        /* called for events in cp_receive_mask/sclp_receive_mask */
        void (*receiver_fn)(struct evbuf_header *);
        /* called for power management events */
        void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
        /* pm event posted flag */
        int pm_event_posted;
};

/* externals from sclp.c */
int sclp_add_request(struct sclp_req *req);
void sclp_sync_wait(void);
int sclp_register(struct sclp_register *reg);
void sclp_unregister(struct sclp_register *reg);
int sclp_remove_processed(struct sccb_header *sccb);
int sclp_deactivate(void);
int sclp_reactivate(void);
int sclp_service_call(sclp_cmdw_t command, void *sccb);
int sclp_sync_request(sclp_cmdw_t command, void *sccb);
int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);

int sclp_sdias_init(void);
void sclp_sdias_exit(void);

extern int sclp_console_pages;
extern int sclp_console_drop;
extern unsigned long sclp_console_full;
extern u8 sclp_fac84;
extern unsigned long long sclp_rzm;
extern unsigned long long sclp_rnmax;

/* useful inlines */

/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
/* translate single character from ASCII to EBCDIC */
static inline unsigned char
sclp_ascebc(unsigned char ch)
{
        return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
}

/* translate string from EBCDIC to ASCII */
static inline void
sclp_ebcasc_str(unsigned char *str, int nr)
{
        (MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
}

/* translate string from ASCII to EBCDIC */
static inline void
sclp_ascebc_str(unsigned char *str, int nr)
{
        (MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
}

static inline struct gds_vector *
sclp_find_gds_vector(void *start, void *end, u16 id)
{
        struct gds_vector *v;

        for (v = start; (void *) v < end; v = (void *) v + v->length)
                if (v->gds_id == id)
                        return v;
        return NULL;
}

static inline struct gds_subvector *
sclp_find_gds_subvector(void *start, void *end, u8 key)
{
        struct gds_subvector *sv;

        for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
                if (sv->key == key)
                        return sv;
        return NULL;
}

#endif   /* __SCLP_H__ */