1 /* 2 * Channel subsystem structures and definitions. 3 * 4 * Copyright 2012 IBM Corp. 5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> 6 * 7 * This work is licensed under the terms of the GNU GPL, version 2 or (at 8 * your option) any later version. See the COPYING file in the top-level 9 * directory. 10 */ 11 12 #ifndef CSS_H 13 #define CSS_H 14 15 #include "hw/s390x/adapter.h" 16 #include "hw/s390x/s390_flic.h" 17 #include "hw/s390x/ioinst.h" 18 19 /* Channel subsystem constants. */ 20 #define MAX_DEVNO 65535 21 #define MAX_SCHID 65535 22 #define MAX_SSID 3 23 #define MAX_CSSID 255 24 #define MAX_CHPID 255 25 26 #define MAX_ISC 7 27 28 #define MAX_CIWS 62 29 30 #define VIRTUAL_CSSID 0xfe 31 32 typedef struct CIW { 33 uint8_t type; 34 uint8_t command; 35 uint16_t count; 36 } QEMU_PACKED CIW; 37 38 typedef struct SenseId { 39 /* common part */ 40 uint8_t reserved; /* always 0x'FF' */ 41 uint16_t cu_type; /* control unit type */ 42 uint8_t cu_model; /* control unit model */ 43 uint16_t dev_type; /* device type */ 44 uint8_t dev_model; /* device model */ 45 uint8_t unused; /* padding byte */ 46 /* extended part */ 47 CIW ciw[MAX_CIWS]; /* variable # of CIWs */ 48 } QEMU_PACKED SenseId; 49 50 /* Channel measurements, from linux/drivers/s390/cio/cmf.c. */ 51 typedef struct CMB { 52 uint16_t ssch_rsch_count; 53 uint16_t sample_count; 54 uint32_t device_connect_time; 55 uint32_t function_pending_time; 56 uint32_t device_disconnect_time; 57 uint32_t control_unit_queuing_time; 58 uint32_t device_active_only_time; 59 uint32_t reserved[2]; 60 } QEMU_PACKED CMB; 61 62 typedef struct CMBE { 63 uint32_t ssch_rsch_count; 64 uint32_t sample_count; 65 uint32_t device_connect_time; 66 uint32_t function_pending_time; 67 uint32_t device_disconnect_time; 68 uint32_t control_unit_queuing_time; 69 uint32_t device_active_only_time; 70 uint32_t device_busy_time; 71 uint32_t initial_command_response_time; 72 uint32_t reserved[7]; 73 } QEMU_PACKED CMBE; 74 75 typedef struct SubchDev SubchDev; 76 struct SubchDev { 77 /* channel-subsystem related things: */ 78 uint8_t cssid; 79 uint8_t ssid; 80 uint16_t schid; 81 uint16_t devno; 82 SCHIB curr_status; 83 uint8_t sense_data[32]; 84 hwaddr channel_prog; 85 CCW1 last_cmd; 86 bool last_cmd_valid; 87 bool ccw_fmt_1; 88 bool thinint_active; 89 uint8_t ccw_no_data_cnt; 90 /* transport-provided data: */ 91 int (*ccw_cb) (SubchDev *, CCW1); 92 void (*disable_cb)(SubchDev *); 93 SenseId id; 94 void *driver_data; 95 }; 96 97 typedef struct IndAddr { 98 hwaddr addr; 99 uint64_t map; 100 unsigned long refcnt; 101 int len; 102 QTAILQ_ENTRY(IndAddr) sibling; 103 } IndAddr; 104 105 IndAddr *get_indicator(hwaddr ind_addr, int len); 106 void release_indicator(AdapterInfo *adapter, IndAddr *indicator); 107 int map_indicator(AdapterInfo *adapter, IndAddr *indicator); 108 109 typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid, 110 uint16_t schid); 111 void subch_device_save(SubchDev *s, QEMUFile *f); 112 int subch_device_load(SubchDev *s, QEMUFile *f); 113 int css_create_css_image(uint8_t cssid, bool default_image); 114 bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno); 115 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid, 116 uint16_t devno, SubchDev *sch); 117 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type); 118 uint16_t css_build_subchannel_id(SubchDev *sch); 119 void css_reset(void); 120 void css_reset_sch(SubchDev *sch); 121 void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid); 122 void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid, 123 int hotplugged, int add); 124 void css_generate_chp_crws(uint8_t cssid, uint8_t chpid); 125 void css_generate_css_crws(uint8_t cssid); 126 void css_clear_sei_pending(void); 127 void css_adapter_interrupt(uint8_t isc); 128 129 typedef enum { 130 CSS_IO_ADAPTER_VIRTIO = 0, 131 CSS_IO_ADAPTER_PCI = 1, 132 CSS_IO_ADAPTER_TYPE_NUMS, 133 } CssIoAdapterType; 134 135 uint32_t css_get_adapter_id(CssIoAdapterType type, uint8_t isc); 136 void css_register_io_adapters(CssIoAdapterType type, bool swap, bool maskable, 137 Error **errp); 138 139 #ifndef CONFIG_USER_ONLY 140 SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, 141 uint16_t schid); 142 bool css_subch_visible(SubchDev *sch); 143 void css_conditional_io_interrupt(SubchDev *sch); 144 int css_do_stsch(SubchDev *sch, SCHIB *schib); 145 bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); 146 int css_do_msch(SubchDev *sch, const SCHIB *schib); 147 int css_do_xsch(SubchDev *sch); 148 int css_do_csch(SubchDev *sch); 149 int css_do_hsch(SubchDev *sch); 150 int css_do_ssch(SubchDev *sch, ORB *orb); 151 int css_do_tsch_get_irb(SubchDev *sch, IRB *irb, int *irb_len); 152 void css_do_tsch_update_subch(SubchDev *sch); 153 int css_do_stcrw(CRW *crw); 154 void css_undo_stcrw(CRW *crw); 155 int css_do_tpi(IOIntCode *int_code, int lowcore); 156 int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid, 157 int rfmt, void *buf); 158 void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo); 159 int css_enable_mcsse(void); 160 int css_enable_mss(void); 161 int css_do_rsch(SubchDev *sch); 162 int css_do_rchp(uint8_t cssid, uint8_t chpid); 163 bool css_present(uint8_t cssid); 164 #endif 165 /* 166 * Identify a device within the channel subsystem. 167 * Note that this can be used to identify either the subchannel or 168 * the attached I/O device, as there's always one I/O device per 169 * subchannel. 170 */ 171 typedef struct CssDevId { 172 uint8_t cssid; 173 uint8_t ssid; 174 uint16_t devid; 175 bool valid; 176 } CssDevId; 177 178 extern PropertyInfo css_devid_propinfo; 179 180 #define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \ 181 DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId) 182 183 extern PropertyInfo css_devid_ro_propinfo; 184 185 #define DEFINE_PROP_CSS_DEV_ID_RO(_n, _s, _f) \ 186 DEFINE_PROP(_n, _s, _f, css_devid_ro_propinfo, CssDevId) 187 188 /** 189 * Create a subchannel for the given bus id. 190 * 191 * If @p bus_id is valid, verify that it uses the virtual channel 192 * subsystem id and is not already in use, and find a free subchannel 193 * id for it. If @p bus_id is not valid, find a free subchannel id and 194 * device number across all subchannel sets. If either of the former 195 * actions succeed, allocate a subchannel structure, initialise it 196 * with the bus id, subchannel id and device number, register it with 197 * the CSS and return it. Otherwise return NULL. 198 * 199 * The caller becomes owner of the returned subchannel structure and 200 * is responsible for unregistering and freeing it. 201 */ 202 SubchDev *css_create_virtual_sch(CssDevId bus_id, Error **errp); 203 #endif 204