304 lines
8.6 KiB
C
304 lines
8.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 1999,2012
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*
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* Author(s): Martin Peschke <mpeschke@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#ifndef __SCLP_H__
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#define __SCLP_H__
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#include <linux/types.h>
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#include <linux/list.h>
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#include <asm/sclp.h>
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#include <asm/ebcdic.h>
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/* maximum number of pages concerning our own memory management */
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#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
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#define SCLP_CONSOLE_PAGES 6
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#define SCLP_EVTYP_MASK(T) (1U << (32 - (T)))
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#define EVTYP_OPCMD 0x01
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#define EVTYP_MSG 0x02
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#define EVTYP_CONFMGMDATA 0x04
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#define EVTYP_DIAG_TEST 0x07
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#define EVTYP_STATECHANGE 0x08
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#define EVTYP_PMSGCMD 0x09
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#define EVTYP_ASYNC 0x0A
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#define EVTYP_CTLPROGIDENT 0x0B
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#define EVTYP_ERRNOTIFY 0x18
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#define EVTYP_VT220MSG 0x1A
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#define EVTYP_SDIAS 0x1C
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#define EVTYP_SIGQUIESCE 0x1D
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#define EVTYP_OCF 0x1E
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#define EVTYP_OPCMD_MASK SCLP_EVTYP_MASK(EVTYP_OPCMD)
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#define EVTYP_MSG_MASK SCLP_EVTYP_MASK(EVTYP_MSG)
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#define EVTYP_CONFMGMDATA_MASK SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
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#define EVTYP_DIAG_TEST_MASK SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
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#define EVTYP_STATECHANGE_MASK SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
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#define EVTYP_PMSGCMD_MASK SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
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#define EVTYP_ASYNC_MASK SCLP_EVTYP_MASK(EVTYP_ASYNC)
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#define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
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#define EVTYP_ERRNOTIFY_MASK SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
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#define EVTYP_VT220MSG_MASK SCLP_EVTYP_MASK(EVTYP_VT220MSG)
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#define EVTYP_SDIAS_MASK SCLP_EVTYP_MASK(EVTYP_SDIAS)
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#define EVTYP_SIGQUIESCE_MASK SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
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#define EVTYP_OCF_MASK SCLP_EVTYP_MASK(EVTYP_OCF)
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#define GNRLMSGFLGS_DOM 0x8000
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#define GNRLMSGFLGS_SNDALRM 0x4000
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#define GNRLMSGFLGS_HOLDMSG 0x2000
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#define LNTPFLGS_CNTLTEXT 0x8000
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#define LNTPFLGS_LABELTEXT 0x4000
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#define LNTPFLGS_DATATEXT 0x2000
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#define LNTPFLGS_ENDTEXT 0x1000
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#define LNTPFLGS_PROMPTTEXT 0x0800
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typedef unsigned int sclp_cmdw_t;
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#define SCLP_CMDW_READ_CPU_INFO 0x00010001
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#define SCLP_CMDW_READ_EVENT_DATA 0x00770005
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#define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005
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#define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005
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#define GDS_ID_MDSMU 0x1310
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#define GDS_ID_MDSROUTEINFO 0x1311
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#define GDS_ID_AGUNWRKCORR 0x1549
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#define GDS_ID_SNACONDREPORT 0x1532
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#define GDS_ID_CPMSU 0x1212
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#define GDS_ID_ROUTTARGINSTR 0x154D
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#define GDS_ID_OPREQ 0x8070
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#define GDS_ID_TEXTCMD 0x1320
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#define GDS_KEY_SELFDEFTEXTMSG 0x31
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enum sclp_pm_event {
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SCLP_PM_EVENT_FREEZE,
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SCLP_PM_EVENT_THAW,
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SCLP_PM_EVENT_RESTORE,
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};
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#define SCLP_PANIC_PRIO 1
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#define SCLP_PANIC_PRIO_CLIENT 0
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typedef u32 sccb_mask_t; /* ATTENTION: assumes 32bit mask !!! */
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struct sccb_header {
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u16 length;
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u8 function_code;
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u8 control_mask[3];
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u16 response_code;
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} __attribute__((packed));
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struct init_sccb {
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struct sccb_header header;
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u16 _reserved;
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u16 mask_length;
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sccb_mask_t receive_mask;
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sccb_mask_t send_mask;
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sccb_mask_t sclp_receive_mask;
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sccb_mask_t sclp_send_mask;
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} __attribute__((packed));
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struct read_cpu_info_sccb {
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struct sccb_header header;
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u16 nr_configured;
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u16 offset_configured;
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u16 nr_standby;
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u16 offset_standby;
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u8 reserved[4096 - 16];
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} __attribute__((packed, aligned(PAGE_SIZE)));
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static inline void sclp_fill_core_info(struct sclp_core_info *info,
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struct read_cpu_info_sccb *sccb)
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{
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char *page = (char *) sccb;
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memset(info, 0, sizeof(*info));
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info->configured = sccb->nr_configured;
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info->standby = sccb->nr_standby;
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info->combined = sccb->nr_configured + sccb->nr_standby;
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memcpy(&info->core, page + sccb->offset_configured,
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info->combined * sizeof(struct sclp_core_entry));
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}
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#define SCLP_HAS_CHP_INFO (sclp.facilities & 0x8000000000000000ULL)
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#define SCLP_HAS_CHP_RECONFIG (sclp.facilities & 0x2000000000000000ULL)
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#define SCLP_HAS_CPU_INFO (sclp.facilities & 0x0800000000000000ULL)
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#define SCLP_HAS_CPU_RECONFIG (sclp.facilities & 0x0400000000000000ULL)
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#define SCLP_HAS_PCI_RECONFIG (sclp.facilities & 0x0000000040000000ULL)
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struct gds_subvector {
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u8 length;
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u8 key;
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} __attribute__((packed));
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struct gds_vector {
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u16 length;
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u16 gds_id;
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} __attribute__((packed));
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struct evbuf_header {
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u16 length;
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u8 type;
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u8 flags;
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u16 _reserved;
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} __attribute__((packed));
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struct sclp_req {
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struct list_head list; /* list_head for request queueing. */
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sclp_cmdw_t command; /* sclp command to execute */
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void *sccb; /* pointer to the sccb to execute */
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char status; /* status of this request */
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int start_count; /* number of SVCs done for this req */
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/* Callback that is called after reaching final status. */
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void (*callback)(struct sclp_req *, void *data);
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void *callback_data;
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int queue_timeout; /* request queue timeout (sec), set by
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caller of sclp_add_request(), if
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needed */
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/* Internal fields */
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unsigned long queue_expires; /* request queue timeout (jiffies) */
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};
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#define SCLP_REQ_FILLED 0x00 /* request is ready to be processed */
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#define SCLP_REQ_QUEUED 0x01 /* request is queued to be processed */
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#define SCLP_REQ_RUNNING 0x02 /* request is currently running */
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#define SCLP_REQ_DONE 0x03 /* request is completed successfully */
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#define SCLP_REQ_FAILED 0x05 /* request is finally failed */
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#define SCLP_REQ_QUEUED_TIMEOUT 0x06 /* request on queue timed out */
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#define SCLP_QUEUE_INTERVAL 5 /* timeout interval for request queue */
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/* function pointers that a high level driver has to use for registration */
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/* of some routines it wants to be called from the low level driver */
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struct sclp_register {
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struct list_head list;
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/* User wants to receive: */
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sccb_mask_t receive_mask;
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/* User wants to send: */
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sccb_mask_t send_mask;
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/* H/W can receive: */
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sccb_mask_t sclp_receive_mask;
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/* H/W can send: */
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sccb_mask_t sclp_send_mask;
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/* called if event type availability changes */
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void (*state_change_fn)(struct sclp_register *);
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/* called for events in cp_receive_mask/sclp_receive_mask */
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void (*receiver_fn)(struct evbuf_header *);
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/* called for power management events */
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void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
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/* pm event posted flag */
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int pm_event_posted;
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};
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/* externals from sclp.c */
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int sclp_add_request(struct sclp_req *req);
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void sclp_sync_wait(void);
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int sclp_register(struct sclp_register *reg);
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void sclp_unregister(struct sclp_register *reg);
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int sclp_remove_processed(struct sccb_header *sccb);
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int sclp_deactivate(void);
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int sclp_reactivate(void);
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int sclp_sync_request(sclp_cmdw_t command, void *sccb);
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int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
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int sclp_sdias_init(void);
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void sclp_sdias_exit(void);
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enum {
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sclp_init_state_uninitialized,
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sclp_init_state_initializing,
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sclp_init_state_initialized
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};
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extern int sclp_init_state;
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extern int sclp_console_pages;
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extern int sclp_console_drop;
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extern unsigned long sclp_console_full;
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extern char sclp_early_sccb[PAGE_SIZE];
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void sclp_early_wait_irq(void);
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int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
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unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
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int sclp_early_set_event_mask(struct init_sccb *sccb,
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unsigned long receive_mask,
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unsigned long send_mask);
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/* useful inlines */
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/* Perform service call. Return 0 on success, non-zero otherwise. */
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static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
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{
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int cc = 4; /* Initialize for program check handling */
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asm volatile(
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"0: .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */
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"1: ipm %0\n"
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" srl %0,28\n"
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"2:\n"
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EX_TABLE(0b, 2b)
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EX_TABLE(1b, 2b)
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: "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
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: "cc", "memory");
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if (cc == 4)
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return -EINVAL;
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if (cc == 3)
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return -EIO;
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if (cc == 2)
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return -EBUSY;
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return 0;
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}
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/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
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/* translate single character from ASCII to EBCDIC */
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static inline unsigned char
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sclp_ascebc(unsigned char ch)
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{
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return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
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}
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/* translate string from EBCDIC to ASCII */
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static inline void
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sclp_ebcasc_str(unsigned char *str, int nr)
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{
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(MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
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}
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/* translate string from ASCII to EBCDIC */
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static inline void
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sclp_ascebc_str(unsigned char *str, int nr)
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{
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(MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
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}
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static inline struct gds_vector *
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sclp_find_gds_vector(void *start, void *end, u16 id)
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{
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struct gds_vector *v;
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for (v = start; (void *) v < end; v = (void *) v + v->length)
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if (v->gds_id == id)
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return v;
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return NULL;
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}
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static inline struct gds_subvector *
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sclp_find_gds_subvector(void *start, void *end, u8 key)
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{
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struct gds_subvector *sv;
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for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
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if (sv->key == key)
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return sv;
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return NULL;
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}
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#endif /* __SCLP_H__ */
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