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linux-stable/drivers/s390/char/sclp.h
Heiko Carstens f694bb3a36 s390/sclp: get rid of common response code handling 
Get rid of common response code handling. Each command requires its
own response code handling anyway. Also the retry in case of -EBUSY
does not work and can be simply removed.

Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-02-08 14:13:21 +01:00

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/*
* 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 SCLP_EVTYP_MASK(T) (1U << (32 - (T)))
#define EVTYP_OPCMD 0x01
#define EVTYP_MSG 0x02
#define EVTYP_CONFMGMDATA 0x04
#define EVTYP_DIAG_TEST 0x07
#define EVTYP_STATECHANGE 0x08
#define EVTYP_PMSGCMD 0x09
#define EVTYP_ASYNC 0x0A
#define EVTYP_CTLPROGIDENT 0x0B
#define EVTYP_ERRNOTIFY 0x18
#define EVTYP_VT220MSG 0x1A
#define EVTYP_SDIAS 0x1C
#define EVTYP_SIGQUIESCE 0x1D
#define EVTYP_OCF 0x1E
#define EVTYP_OPCMD_MASK SCLP_EVTYP_MASK(EVTYP_OPCMD)
#define EVTYP_MSG_MASK SCLP_EVTYP_MASK(EVTYP_MSG)
#define EVTYP_CONFMGMDATA_MASK SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
#define EVTYP_DIAG_TEST_MASK SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
#define EVTYP_STATECHANGE_MASK SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
#define EVTYP_PMSGCMD_MASK SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
#define EVTYP_ASYNC_MASK SCLP_EVTYP_MASK(EVTYP_ASYNC)
#define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
#define EVTYP_ERRNOTIFY_MASK SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
#define EVTYP_VT220MSG_MASK SCLP_EVTYP_MASK(EVTYP_VT220MSG)
#define EVTYP_SDIAS_MASK SCLP_EVTYP_MASK(EVTYP_SDIAS)
#define EVTYP_SIGQUIESCE_MASK SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
#define EVTYP_OCF_MASK SCLP_EVTYP_MASK(EVTYP_OCF)
#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_CPU_INFO 0x00010001
#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));
struct read_cpu_info_sccb {
struct sccb_header header;
u16 nr_configured;
u16 offset_configured;
u16 nr_standby;
u16 offset_standby;
u8 reserved[4096 - 16];
} __attribute__((packed, aligned(PAGE_SIZE)));
static inline void sclp_fill_core_info(struct sclp_core_info *info,
struct read_cpu_info_sccb *sccb)
{
char *page = (char *) sccb;
memset(info, 0, sizeof(*info));
info->configured = sccb->nr_configured;
info->standby = sccb->nr_standby;
info->combined = sccb->nr_configured + sccb->nr_standby;
memcpy(&info->core, page + sccb->offset_configured,
info->combined * sizeof(struct sclp_core_entry));
}
#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_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);
enum {
sclp_init_state_uninitialized,
sclp_init_state_initializing,
sclp_init_state_initialized
};
extern int sclp_init_state;
extern int sclp_console_pages;
extern int sclp_console_drop;
extern unsigned long sclp_console_full;
extern char sclp_early_sccb[PAGE_SIZE];
void sclp_early_wait_irq(void);
int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
int sclp_early_set_event_mask(struct init_sccb *sccb,
unsigned long receive_mask,
unsigned long send_mask);
/* useful inlines */
/* Perform service call. Return 0 on success, non-zero otherwise. */
static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
{
int cc = 4; /* Initialize for program check handling */
asm volatile(
"0: .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */
"1: ipm %0\n"
" srl %0,28\n"
"2:\n"
EX_TABLE(0b, 2b)
EX_TABLE(1b, 2b)
: "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
: "cc", "memory");
if (cc == 4)
return -EINVAL;
if (cc == 3)
return -EIO;
if (cc == 2)
return -EBUSY;
return 0;
}
/* 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__ */
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