diff options
Diffstat (limited to 'include/hw/s390x/css.h')
| -rw-r--r-- | include/hw/s390x/css.h | 47 |
1 files changed, 37 insertions, 10 deletions
diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h index 69b374730e..ab6ebe66b5 100644 --- a/include/hw/s390x/css.h +++ b/include/hw/s390x/css.h @@ -99,6 +99,22 @@ typedef struct CcwDataStream { hwaddr cda; } CcwDataStream; +/* + * IO instructions conclude according to this. Currently we have only + * cc codes. Valid values are 0, 1, 2, 3 and the generic semantic for + * IO instructions is described briefly. For more details consult the PoP. + */ +typedef enum IOInstEnding { + /* produced expected result */ + IOINST_CC_EXPECTED = 0, + /* status conditions were present or produced alternate result */ + IOINST_CC_STATUS_PRESENT = 1, + /* inst. ineffective because busy with previously initiated function */ + IOINST_CC_BUSY = 2, + /* inst. ineffective because not operational */ + IOINST_CC_NOT_OPERATIONAL = 3 +} IOInstEnding; + typedef struct SubchDev SubchDev; struct SubchDev { /* channel-subsystem related things: */ @@ -120,11 +136,22 @@ struct SubchDev { /* transport-provided data: */ int (*ccw_cb) (SubchDev *, CCW1); void (*disable_cb)(SubchDev *); - int (*do_subchannel_work) (SubchDev *); + IOInstEnding (*do_subchannel_work) (SubchDev *); SenseId id; void *driver_data; }; +static inline void sch_gen_unit_exception(SubchDev *sch) +{ + sch->curr_status.scsw.ctrl &= ~SCSW_ACTL_START_PEND; + sch->curr_status.scsw.ctrl |= SCSW_STCTL_PRIMARY | + SCSW_STCTL_SECONDARY | + SCSW_STCTL_ALERT | + SCSW_STCTL_STATUS_PEND; + sch->curr_status.scsw.cpa = sch->channel_prog + 8; + sch->curr_status.scsw.dstat = SCSW_DSTAT_UNIT_EXCEP; +} + extern const VMStateDescription vmstate_subch_dev; /* @@ -183,9 +210,9 @@ void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid, void css_generate_chp_crws(uint8_t cssid, uint8_t chpid); void css_generate_css_crws(uint8_t cssid); void css_clear_sei_pending(void); -int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data); -int do_subchannel_work_virtual(SubchDev *sub); -int do_subchannel_work_passthrough(SubchDev *sub); +IOInstEnding s390_ccw_cmd_request(SubchDev *sch); +IOInstEnding do_subchannel_work_virtual(SubchDev *sub); +IOInstEnding do_subchannel_work_passthrough(SubchDev *sub); typedef enum { CSS_IO_ADAPTER_VIRTIO = 0, @@ -212,11 +239,11 @@ bool css_subch_visible(SubchDev *sch); void css_conditional_io_interrupt(SubchDev *sch); int css_do_stsch(SubchDev *sch, SCHIB *schib); bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); -int css_do_msch(SubchDev *sch, const SCHIB *schib); -int css_do_xsch(SubchDev *sch); -int css_do_csch(SubchDev *sch); -int css_do_hsch(SubchDev *sch); -int css_do_ssch(SubchDev *sch, ORB *orb); +IOInstEnding css_do_msch(SubchDev *sch, const SCHIB *schib); +IOInstEnding css_do_xsch(SubchDev *sch); +IOInstEnding css_do_csch(SubchDev *sch); +IOInstEnding css_do_hsch(SubchDev *sch); +IOInstEnding css_do_ssch(SubchDev *sch, ORB *orb); int css_do_tsch_get_irb(SubchDev *sch, IRB *irb, int *irb_len); void css_do_tsch_update_subch(SubchDev *sch); int css_do_stcrw(CRW *crw); @@ -227,7 +254,7 @@ int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid, void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo); int css_enable_mcsse(void); int css_enable_mss(void); -int css_do_rsch(SubchDev *sch); +IOInstEnding css_do_rsch(SubchDev *sch); int css_do_rchp(uint8_t cssid, uint8_t chpid); bool css_present(uint8_t cssid); #endif |