diff options
Diffstat (limited to 'drivers/s390/char/sclp_cmd.c')
-rw-r--r-- | drivers/s390/char/sclp_cmd.c | 180 |
1 files changed, 9 insertions, 171 deletions
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c index 77df9cb..eaa21d5 100644 --- a/drivers/s390/char/sclp_cmd.c +++ b/drivers/s390/char/sclp_cmd.c @@ -28,168 +28,6 @@ #include "sclp.h" -#define SCLP_CMDW_READ_SCP_INFO 0x00020001 -#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 - -struct read_info_sccb { - struct sccb_header header; /* 0-7 */ - u16 rnmax; /* 8-9 */ - u8 rnsize; /* 10 */ - u8 _reserved0[24 - 11]; /* 11-15 */ - u8 loadparm[8]; /* 24-31 */ - u8 _reserved1[48 - 32]; /* 32-47 */ - u64 facilities; /* 48-55 */ - u8 _reserved2[84 - 56]; /* 56-83 */ - u8 fac84; /* 84 */ - u8 fac85; /* 85 */ - u8 _reserved3[91 - 86]; /* 86-90 */ - u8 flags; /* 91 */ - u8 _reserved4[100 - 92]; /* 92-99 */ - u32 rnsize2; /* 100-103 */ - u64 rnmax2; /* 104-111 */ - u8 _reserved5[4096 - 112]; /* 112-4095 */ -} __attribute__((packed, aligned(PAGE_SIZE))); - -static struct init_sccb __initdata early_event_mask_sccb __aligned(PAGE_SIZE); -static struct read_info_sccb __initdata early_read_info_sccb; -static int __initdata early_read_info_sccb_valid; - -u64 sclp_facilities; -static u8 sclp_fac84; -static unsigned long long rzm; -static unsigned long long rnmax; - -static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb) -{ - int rc; - - __ctl_set_bit(0, 9); - rc = sclp_service_call(cmd, sccb); - if (rc) - goto out; - __load_psw_mask(PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA | - PSW_MASK_BA | PSW_MASK_EXT | PSW_MASK_WAIT); - local_irq_disable(); -out: - /* Contents of the sccb might have changed. */ - barrier(); - __ctl_clear_bit(0, 9); - return rc; -} - -static void __init sclp_read_info_early(void) -{ - int rc; - int i; - struct read_info_sccb *sccb; - sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED, - SCLP_CMDW_READ_SCP_INFO}; - - sccb = &early_read_info_sccb; - for (i = 0; i < ARRAY_SIZE(commands); i++) { - do { - memset(sccb, 0, sizeof(*sccb)); - sccb->header.length = sizeof(*sccb); - sccb->header.function_code = 0x80; - sccb->header.control_mask[2] = 0x80; - rc = sclp_cmd_sync_early(commands[i], sccb); - } while (rc == -EBUSY); - - if (rc) - break; - if (sccb->header.response_code == 0x10) { - early_read_info_sccb_valid = 1; - break; - } - if (sccb->header.response_code != 0x1f0) - break; - } -} - -static void __init sclp_event_mask_early(void) -{ - struct init_sccb *sccb = &early_event_mask_sccb; - int rc; - - do { - memset(sccb, 0, sizeof(*sccb)); - sccb->header.length = sizeof(*sccb); - sccb->mask_length = sizeof(sccb_mask_t); - rc = sclp_cmd_sync_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb); - } while (rc == -EBUSY); -} - -void __init sclp_facilities_detect(void) -{ - struct read_info_sccb *sccb; - - sclp_read_info_early(); - if (!early_read_info_sccb_valid) - return; - - sccb = &early_read_info_sccb; - sclp_facilities = sccb->facilities; - sclp_fac84 = sccb->fac84; - if (sccb->fac85 & 0x02) - S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP; - rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; - rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; - rzm <<= 20; - - sclp_event_mask_early(); -} - -bool __init sclp_has_linemode(void) -{ - struct init_sccb *sccb = &early_event_mask_sccb; - - if (sccb->header.response_code != 0x20) - return 0; - if (!(sccb->sclp_send_mask & (EVTYP_OPCMD_MASK | EVTYP_PMSGCMD_MASK))) - return 0; - if (!(sccb->sclp_receive_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK))) - return 0; - return 1; -} - -bool __init sclp_has_vt220(void) -{ - struct init_sccb *sccb = &early_event_mask_sccb; - - if (sccb->header.response_code != 0x20) - return 0; - if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK) - return 1; - return 0; -} - -unsigned long long sclp_get_rnmax(void) -{ - return rnmax; -} - -unsigned long long sclp_get_rzm(void) -{ - return rzm; -} - -/* - * This function will be called after sclp_facilities_detect(), which gets - * called from early.c code. Therefore the sccb should have valid contents. - */ -void __init sclp_get_ipl_info(struct sclp_ipl_info *info) -{ - struct read_info_sccb *sccb; - - if (!early_read_info_sccb_valid) - return; - sccb = &early_read_info_sccb; - info->is_valid = 1; - if (sccb->flags & 0x2) - info->has_dump = 1; - memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN); -} - static void sclp_sync_callback(struct sclp_req *req, void *data) { struct completion *completion = data; @@ -356,14 +194,14 @@ struct assign_storage_sccb { int arch_get_memory_phys_device(unsigned long start_pfn) { - if (!rzm) + if (!sclp_rzm) return 0; - return PFN_PHYS(start_pfn) >> ilog2(rzm); + return PFN_PHYS(start_pfn) >> ilog2(sclp_rzm); } static unsigned long long rn2addr(u16 rn) { - return (unsigned long long) (rn - 1) * rzm; + return (unsigned long long) (rn - 1) * sclp_rzm; } static int do_assign_storage(sclp_cmdw_t cmd, u16 rn) @@ -404,7 +242,7 @@ static int sclp_assign_storage(u16 rn) if (rc) return rc; start = rn2addr(rn); - storage_key_init_range(start, start + rzm); + storage_key_init_range(start, start + sclp_rzm); return 0; } @@ -462,7 +300,7 @@ static int sclp_mem_change_state(unsigned long start, unsigned long size, istart = rn2addr(incr->rn); if (start + size - 1 < istart) break; - if (start > istart + rzm - 1) + if (start > istart + sclp_rzm - 1) continue; if (online) rc |= sclp_assign_storage(incr->rn); @@ -526,7 +364,7 @@ static void __init add_memory_merged(u16 rn) if (!first_rn) goto skip_add; start = rn2addr(first_rn); - size = (unsigned long long ) num * rzm; + size = (unsigned long long) num * sclp_rzm; if (start >= VMEM_MAX_PHYS) goto skip_add; if (start + size > VMEM_MAX_PHYS) @@ -574,7 +412,7 @@ static void __init insert_increment(u16 rn, int standby, int assigned) } if (!assigned) new_incr->rn = last_rn + 1; - if (new_incr->rn > rnmax) { + if (new_incr->rn > sclp_rnmax) { kfree(new_incr); return; } @@ -617,7 +455,7 @@ static int __init sclp_detect_standby_memory(void) if (OLDMEM_BASE) /* No standby memory in kdump mode */ return 0; - if (!early_read_info_sccb_valid) + if (!sclp_early_read_info_sccb_valid) return 0; if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) return 0; @@ -661,7 +499,7 @@ static int __init sclp_detect_standby_memory(void) } if (rc || list_empty(&sclp_mem_list)) goto out; - for (i = 1; i <= rnmax - assigned; i++) + for (i = 1; i <= sclp_rnmax - assigned; i++) insert_increment(0, 1, 0); rc = register_memory_notifier(&sclp_mem_nb); if (rc) |