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 "cpu.h" 16 #include "hw/s390x/adapter.h" 17 #include "hw/s390x/s390_flic.h" 18 #include "hw/s390x/ioinst.h" 19 20 /* Channel subsystem constants. */ 21 #define MAX_DEVNO 65535 22 #define MAX_SCHID 65535 23 #define MAX_SSID 3 24 #define MAX_CSSID 255 25 #define MAX_CHPID 255 26 27 #define MAX_ISC 7 28 29 #define MAX_CIWS 62 30 31 #define VIRTUAL_CSSID 0xfe 32 #define VIRTIO_CCW_CHPID 0 /* used by convention */ 33 34 typedef struct CIW { 35 uint8_t type; 36 uint8_t command; 37 uint16_t count; 38 } QEMU_PACKED CIW; 39 40 typedef struct SenseId { 41 /* common part */ 42 uint8_t reserved; /* always 0x'FF' */ 43 uint16_t cu_type; /* control unit type */ 44 uint8_t cu_model; /* control unit model */ 45 uint16_t dev_type; /* device type */ 46 uint8_t dev_model; /* device model */ 47 uint8_t unused; /* padding byte */ 48 /* extended part */ 49 CIW ciw[MAX_CIWS]; /* variable # of CIWs */ 50 } QEMU_PACKED SenseId; 51 52 /* Channel measurements, from linux/drivers/s390/cio/cmf.c. */ 53 typedef struct CMB { 54 uint16_t ssch_rsch_count; 55 uint16_t sample_count; 56 uint32_t device_connect_time; 57 uint32_t function_pending_time; 58 uint32_t device_disconnect_time; 59 uint32_t control_unit_queuing_time; 60 uint32_t device_active_only_time; 61 uint32_t reserved[2]; 62 } QEMU_PACKED CMB; 63 64 typedef struct CMBE { 65 uint32_t ssch_rsch_count; 66 uint32_t sample_count; 67 uint32_t device_connect_time; 68 uint32_t function_pending_time; 69 uint32_t device_disconnect_time; 70 uint32_t control_unit_queuing_time; 71 uint32_t device_active_only_time; 72 uint32_t device_busy_time; 73 uint32_t initial_command_response_time; 74 uint32_t reserved[7]; 75 } QEMU_PACKED CMBE; 76 77 typedef struct SubchDev SubchDev; 78 struct SubchDev { 79 /* channel-subsystem related things: */ 80 uint8_t cssid; 81 uint8_t ssid; 82 uint16_t schid; 83 uint16_t devno; 84 SCHIB curr_status; 85 uint8_t sense_data[32]; 86 hwaddr channel_prog; 87 CCW1 last_cmd; 88 bool last_cmd_valid; 89 bool ccw_fmt_1; 90 bool thinint_active; 91 uint8_t ccw_no_data_cnt; 92 uint16_t migrated_schid; /* used for missmatch detection */ 93 ORB orb; 94 /* transport-provided data: */ 95 int (*ccw_cb) (SubchDev *, CCW1); 96 void (*disable_cb)(SubchDev *); 97 int (*do_subchannel_work) (SubchDev *); 98 SenseId id; 99 void *driver_data; 100 }; 101 102 extern const VMStateDescription vmstate_subch_dev; 103 104 /* 105 * Identify a device within the channel subsystem. 106 * Note that this can be used to identify either the subchannel or 107 * the attached I/O device, as there's always one I/O device per 108 * subchannel. 109 */ 110 typedef struct CssDevId { 111 uint8_t cssid; 112 uint8_t ssid; 113 uint16_t devid; 114 bool valid; 115 } CssDevId; 116 117 extern const PropertyInfo css_devid_propinfo; 118 119 #define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \ 120 DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId) 121 122 typedef struct IndAddr { 123 hwaddr addr; 124 uint64_t map; 125 unsigned long refcnt; 126 int32_t len; 127 QTAILQ_ENTRY(IndAddr) sibling; 128 } IndAddr; 129 130 extern const VMStateDescription vmstate_ind_addr; 131 132 #define VMSTATE_PTR_TO_IND_ADDR(_f, _s) \ 133 VMSTATE_STRUCT(_f, _s, 1, vmstate_ind_addr, IndAddr*) 134 135 IndAddr *get_indicator(hwaddr ind_addr, int len); 136 void release_indicator(AdapterInfo *adapter, IndAddr *indicator); 137 int map_indicator(AdapterInfo *adapter, IndAddr *indicator); 138 139 typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid, 140 uint16_t schid); 141 int css_create_css_image(uint8_t cssid, bool default_image); 142 bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno); 143 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid, 144 uint16_t devno, SubchDev *sch); 145 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type); 146 int css_sch_build_schib(SubchDev *sch, CssDevId *dev_id); 147 unsigned int css_find_free_chpid(uint8_t cssid); 148 uint16_t css_build_subchannel_id(SubchDev *sch); 149 void copy_scsw_to_guest(SCSW *dest, const SCSW *src); 150 void css_inject_io_interrupt(SubchDev *sch); 151 void css_reset(void); 152 void css_reset_sch(SubchDev *sch); 153 void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid); 154 void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid, 155 int hotplugged, int add); 156 void css_generate_chp_crws(uint8_t cssid, uint8_t chpid); 157 void css_generate_css_crws(uint8_t cssid); 158 void css_clear_sei_pending(void); 159 int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data); 160 int do_subchannel_work_virtual(SubchDev *sub); 161 int do_subchannel_work_passthrough(SubchDev *sub); 162 163 typedef enum { 164 CSS_IO_ADAPTER_VIRTIO = 0, 165 CSS_IO_ADAPTER_PCI = 1, 166 CSS_IO_ADAPTER_TYPE_NUMS, 167 } CssIoAdapterType; 168 169 void css_adapter_interrupt(CssIoAdapterType type, uint8_t isc); 170 int css_do_sic(CPUS390XState *env, uint8_t isc, uint16_t mode); 171 uint32_t css_get_adapter_id(CssIoAdapterType type, uint8_t isc); 172 void css_register_io_adapters(CssIoAdapterType type, bool swap, bool maskable, 173 uint8_t flags, Error **errp); 174 175 #ifndef CONFIG_KVM 176 #define S390_ADAPTER_SUPPRESSIBLE 0x01 177 #else 178 #define S390_ADAPTER_SUPPRESSIBLE KVM_S390_ADAPTER_SUPPRESSIBLE 179 #endif 180 181 #ifndef CONFIG_USER_ONLY 182 SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, 183 uint16_t schid); 184 bool css_subch_visible(SubchDev *sch); 185 void css_conditional_io_interrupt(SubchDev *sch); 186 int css_do_stsch(SubchDev *sch, SCHIB *schib); 187 bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); 188 int css_do_msch(SubchDev *sch, const SCHIB *schib); 189 int css_do_xsch(SubchDev *sch); 190 int css_do_csch(SubchDev *sch); 191 int css_do_hsch(SubchDev *sch); 192 int css_do_ssch(SubchDev *sch, ORB *orb); 193 int css_do_tsch_get_irb(SubchDev *sch, IRB *irb, int *irb_len); 194 void css_do_tsch_update_subch(SubchDev *sch); 195 int css_do_stcrw(CRW *crw); 196 void css_undo_stcrw(CRW *crw); 197 int css_do_tpi(IOIntCode *int_code, int lowcore); 198 int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid, 199 int rfmt, void *buf); 200 void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo); 201 int css_enable_mcsse(void); 202 int css_enable_mss(void); 203 int css_do_rsch(SubchDev *sch); 204 int css_do_rchp(uint8_t cssid, uint8_t chpid); 205 bool css_present(uint8_t cssid); 206 #endif 207 208 extern const PropertyInfo css_devid_ro_propinfo; 209 210 #define DEFINE_PROP_CSS_DEV_ID_RO(_n, _s, _f) \ 211 DEFINE_PROP(_n, _s, _f, css_devid_ro_propinfo, CssDevId) 212 213 /** 214 * Create a subchannel for the given bus id. 215 * 216 * If @p bus_id is valid, and @p squash_mcss is true, verify that it is 217 * not already in use in the default css, and find a free devno from the 218 * default css image for it. 219 * If @p bus_id is valid, and @p squash_mcss is false, verify that it is 220 * not already in use, and find a free devno for it. 221 * If @p bus_id is not valid, and if either @p squash_mcss or @p is_virtual 222 * is true, find a free subchannel id and device number across all 223 * subchannel sets from the default css image. 224 * If @p bus_id is not valid, and if both @p squash_mcss and @p is_virtual 225 * are false, find a non-full css image and find a free subchannel id and 226 * device number across all subchannel sets from it. 227 * 228 * If either of the former actions succeed, allocate a subchannel structure, 229 * initialise it with the bus id, subchannel id and device number, register 230 * it with the CSS and return it. Otherwise return NULL. 231 * 232 * The caller becomes owner of the returned subchannel structure and 233 * is responsible for unregistering and freeing it. 234 */ 235 SubchDev *css_create_sch(CssDevId bus_id, bool is_virtual, bool squash_mcss, 236 Error **errp); 237 238 /** Turn on css migration */ 239 void css_register_vmstate(void); 240 241 #endif 242