/* * Channel subsystem structures and definitions. * * Copyright 2012 IBM Corp. * Author(s): Cornelia Huck * * This work is licensed under the terms of the GNU GPL, version 2 or (at * your option) any later version. See the COPYING file in the top-level * directory. */ #ifndef CSS_H #define CSS_H #include "hw/s390x/adapter.h" #include "hw/s390x/s390_flic.h" #include "hw/s390x/ioinst.h" /* Channel subsystem constants. */ #define MAX_DEVNO 65535 #define MAX_SCHID 65535 #define MAX_SSID 3 #define MAX_CSSID 255 #define MAX_CHPID 255 #define MAX_CIWS 62 #define VIRTUAL_CSSID 0xfe typedef struct CIW { uint8_t type; uint8_t command; uint16_t count; } QEMU_PACKED CIW; typedef struct SenseId { /* common part */ uint8_t reserved; /* always 0x'FF' */ uint16_t cu_type; /* control unit type */ uint8_t cu_model; /* control unit model */ uint16_t dev_type; /* device type */ uint8_t dev_model; /* device model */ uint8_t unused; /* padding byte */ /* extended part */ CIW ciw[MAX_CIWS]; /* variable # of CIWs */ } QEMU_PACKED SenseId; /* Channel measurements, from linux/drivers/s390/cio/cmf.c. */ typedef struct CMB { uint16_t ssch_rsch_count; uint16_t sample_count; uint32_t device_connect_time; uint32_t function_pending_time; uint32_t device_disconnect_time; uint32_t control_unit_queuing_time; uint32_t device_active_only_time; uint32_t reserved[2]; } QEMU_PACKED CMB; typedef struct CMBE { uint32_t ssch_rsch_count; uint32_t sample_count; uint32_t device_connect_time; uint32_t function_pending_time; uint32_t device_disconnect_time; uint32_t control_unit_queuing_time; uint32_t device_active_only_time; uint32_t device_busy_time; uint32_t initial_command_response_time; uint32_t reserved[7]; } QEMU_PACKED CMBE; typedef struct SubchDev SubchDev; struct SubchDev { /* channel-subsystem related things: */ uint8_t cssid; uint8_t ssid; uint16_t schid; uint16_t devno; SCHIB curr_status; uint8_t sense_data[32]; hwaddr channel_prog; CCW1 last_cmd; bool last_cmd_valid; bool ccw_fmt_1; bool thinint_active; uint8_t ccw_no_data_cnt; /* transport-provided data: */ int (*ccw_cb) (SubchDev *, CCW1); void (*disable_cb)(SubchDev *); SenseId id; void *driver_data; }; typedef struct IndAddr { hwaddr addr; uint64_t map; unsigned long refcnt; int len; QTAILQ_ENTRY(IndAddr) sibling; } IndAddr; IndAddr *get_indicator(hwaddr ind_addr, int len); void release_indicator(AdapterInfo *adapter, IndAddr *indicator); int map_indicator(AdapterInfo *adapter, IndAddr *indicator); typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid, uint16_t schid); void subch_device_save(SubchDev *s, QEMUFile *f); int subch_device_load(SubchDev *s, QEMUFile *f); int css_create_css_image(uint8_t cssid, bool default_image); bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno); void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid, uint16_t devno, SubchDev *sch); void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type); uint16_t css_build_subchannel_id(SubchDev *sch); void css_reset(void); void css_reset_sch(SubchDev *sch); void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid); void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid, int hotplugged, int add); 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); void css_adapter_interrupt(uint8_t isc); #define CSS_IO_ADAPTER_VIRTIO 1 int css_register_io_adapter(uint8_t type, uint8_t isc, bool swap, bool maskable, uint32_t *id); #ifndef CONFIG_USER_ONLY SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, uint16_t schid); 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); 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); void css_undo_stcrw(CRW *crw); int css_do_tpi(IOIntCode *int_code, int lowcore); int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid, int rfmt, void *buf); 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); int css_do_rchp(uint8_t cssid, uint8_t chpid); bool css_present(uint8_t cssid); #endif /* * Identify a device within the channel subsystem. * Note that this can be used to identify either the subchannel or * the attached I/O device, as there's always one I/O device per * subchannel. */ typedef struct CssDevId { uint8_t cssid; uint8_t ssid; uint16_t devid; bool valid; } CssDevId; extern PropertyInfo css_devid_propinfo; #define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId) /** * Create a subchannel for the given bus id. * * If @p bus_id is valid, verify that it uses the virtual channel * subsystem id and is not already in use, and find a free subchannel * id for it. If @p bus_id is not valid, find a free subchannel id and * device number across all subchannel sets. If either of the former * actions succeed, allocate a subchannel structure, initialise it * with the bus id, subchannel id and device number, register it with * the CSS and return it. Otherwise return NULL. * * The caller becomes owner of the returned subchannel structure and * is responsible for unregistering and freeing it. */ SubchDev *css_create_virtual_sch(CssDevId bus_id, Error **errp); #endif