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 #include "sysemu/kvm.h" 20 21 /* Channel subsystem constants. */ 22 #define MAX_DEVNO 65535 23 #define MAX_SCHID 65535 24 #define MAX_SSID 3 25 #define MAX_CSSID 255 26 #define MAX_CHPID 255 27 28 #define MAX_ISC 7 29 30 #define MAX_CIWS 62 31 32 #define VIRTUAL_CSSID 0xfe 33 #define VIRTIO_CCW_CHPID 0 /* used by convention */ 34 35 typedef struct CIW { 36 uint8_t type; 37 uint8_t command; 38 uint16_t count; 39 } QEMU_PACKED CIW; 40 41 typedef struct SenseId { 42 /* common part */ 43 uint8_t reserved; /* always 0x'FF' */ 44 uint16_t cu_type; /* control unit type */ 45 uint8_t cu_model; /* control unit model */ 46 uint16_t dev_type; /* device type */ 47 uint8_t dev_model; /* device model */ 48 uint8_t unused; /* padding byte */ 49 /* extended part */ 50 CIW ciw[MAX_CIWS]; /* variable # of CIWs */ 51 } QEMU_PACKED SenseId; 52 53 /* Channel measurements, from linux/drivers/s390/cio/cmf.c. */ 54 typedef struct CMB { 55 uint16_t ssch_rsch_count; 56 uint16_t sample_count; 57 uint32_t device_connect_time; 58 uint32_t function_pending_time; 59 uint32_t device_disconnect_time; 60 uint32_t control_unit_queuing_time; 61 uint32_t device_active_only_time; 62 uint32_t reserved[2]; 63 } QEMU_PACKED CMB; 64 65 typedef struct CMBE { 66 uint32_t ssch_rsch_count; 67 uint32_t sample_count; 68 uint32_t device_connect_time; 69 uint32_t function_pending_time; 70 uint32_t device_disconnect_time; 71 uint32_t control_unit_queuing_time; 72 uint32_t device_active_only_time; 73 uint32_t device_busy_time; 74 uint32_t initial_command_response_time; 75 uint32_t reserved[7]; 76 } QEMU_PACKED CMBE; 77 78 typedef struct SubchDev SubchDev; 79 struct SubchDev { 80 /* channel-subsystem related things: */ 81 uint8_t cssid; 82 uint8_t ssid; 83 uint16_t schid; 84 uint16_t devno; 85 SCHIB curr_status; 86 uint8_t sense_data[32]; 87 hwaddr channel_prog; 88 CCW1 last_cmd; 89 bool last_cmd_valid; 90 bool ccw_fmt_1; 91 bool thinint_active; 92 uint8_t ccw_no_data_cnt; 93 uint16_t migrated_schid; /* used for missmatch detection */ 94 ORB orb; 95 /* transport-provided data: */ 96 int (*ccw_cb) (SubchDev *, CCW1); 97 void (*disable_cb)(SubchDev *); 98 int (*do_subchannel_work) (SubchDev *); 99 SenseId id; 100 void *driver_data; 101 }; 102 103 extern const VMStateDescription vmstate_subch_dev; 104 105 /* 106 * Identify a device within the channel subsystem. 107 * Note that this can be used to identify either the subchannel or 108 * the attached I/O device, as there's always one I/O device per 109 * subchannel. 110 */ 111 typedef struct CssDevId { 112 uint8_t cssid; 113 uint8_t ssid; 114 uint16_t devid; 115 bool valid; 116 } CssDevId; 117 118 extern const PropertyInfo css_devid_propinfo; 119 120 #define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \ 121 DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId) 122 123 typedef struct IndAddr { 124 hwaddr addr; 125 uint64_t map; 126 unsigned long refcnt; 127 int32_t len; 128 QTAILQ_ENTRY(IndAddr) sibling; 129 } IndAddr; 130 131 extern const VMStateDescription vmstate_ind_addr; 132 133 #define VMSTATE_PTR_TO_IND_ADDR(_f, _s) \ 134 VMSTATE_STRUCT(_f, _s, 1, vmstate_ind_addr, IndAddr*) 135 136 IndAddr *get_indicator(hwaddr ind_addr, int len); 137 void release_indicator(AdapterInfo *adapter, IndAddr *indicator); 138 int map_indicator(AdapterInfo *adapter, IndAddr *indicator); 139 140 typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid, 141 uint16_t schid); 142 int css_create_css_image(uint8_t cssid, bool default_image); 143 bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno); 144 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid, 145 uint16_t devno, SubchDev *sch); 146 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type); 147 int css_sch_build_schib(SubchDev *sch, CssDevId *dev_id); 148 unsigned int css_find_free_chpid(uint8_t cssid); 149 uint16_t css_build_subchannel_id(SubchDev *sch); 150 void copy_scsw_to_guest(SCSW *dest, const SCSW *src); 151 void css_inject_io_interrupt(SubchDev *sch); 152 void css_reset(void); 153 void css_reset_sch(SubchDev *sch); 154 void css_queue_crw(uint8_t rsc, uint8_t erc, int solicited, 155 int chain, uint16_t rsid); 156 void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid, 157 int hotplugged, int add); 158 void css_generate_chp_crws(uint8_t cssid, uint8_t chpid); 159 void css_generate_css_crws(uint8_t cssid); 160 void css_clear_sei_pending(void); 161 int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data); 162 int do_subchannel_work_virtual(SubchDev *sub); 163 int do_subchannel_work_passthrough(SubchDev *sub); 164 165 typedef enum { 166 CSS_IO_ADAPTER_VIRTIO = 0, 167 CSS_IO_ADAPTER_PCI = 1, 168 CSS_IO_ADAPTER_TYPE_NUMS, 169 } CssIoAdapterType; 170 171 void css_adapter_interrupt(CssIoAdapterType type, uint8_t isc); 172 int css_do_sic(CPUS390XState *env, uint8_t isc, uint16_t mode); 173 uint32_t css_get_adapter_id(CssIoAdapterType type, uint8_t isc); 174 void css_register_io_adapters(CssIoAdapterType type, bool swap, bool maskable, 175 uint8_t flags, Error **errp); 176 177 #ifndef CONFIG_KVM 178 #define S390_ADAPTER_SUPPRESSIBLE 0x01 179 #else 180 #define S390_ADAPTER_SUPPRESSIBLE KVM_S390_ADAPTER_SUPPRESSIBLE 181 #endif 182 183 #ifndef CONFIG_USER_ONLY 184 SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, 185 uint16_t schid); 186 bool css_subch_visible(SubchDev *sch); 187 void css_conditional_io_interrupt(SubchDev *sch); 188 int css_do_stsch(SubchDev *sch, SCHIB *schib); 189 bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); 190 int css_do_msch(SubchDev *sch, const SCHIB *schib); 191 int css_do_xsch(SubchDev *sch); 192 int css_do_csch(SubchDev *sch); 193 int css_do_hsch(SubchDev *sch); 194 int css_do_ssch(SubchDev *sch, ORB *orb); 195 int css_do_tsch_get_irb(SubchDev *sch, IRB *irb, int *irb_len); 196 void css_do_tsch_update_subch(SubchDev *sch); 197 int css_do_stcrw(CRW *crw); 198 void css_undo_stcrw(CRW *crw); 199 int css_do_tpi(IOIntCode *int_code, int lowcore); 200 int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid, 201 int rfmt, void *buf); 202 void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo); 203 int css_enable_mcsse(void); 204 int css_enable_mss(void); 205 int css_do_rsch(SubchDev *sch); 206 int css_do_rchp(uint8_t cssid, uint8_t chpid); 207 bool css_present(uint8_t cssid); 208 #endif 209 210 extern const PropertyInfo css_devid_ro_propinfo; 211 212 #define DEFINE_PROP_CSS_DEV_ID_RO(_n, _s, _f) \ 213 DEFINE_PROP(_n, _s, _f, css_devid_ro_propinfo, CssDevId) 214 215 /** 216 * Create a subchannel for the given bus id. 217 * 218 * If @p bus_id is valid, and @p squash_mcss is true, verify that it is 219 * not already in use in the default css, and find a free devno from the 220 * default css image for it. 221 * If @p bus_id is valid, and @p squash_mcss is false, verify that it is 222 * not already in use, and find a free devno for it. 223 * If @p bus_id is not valid, and if either @p squash_mcss or @p is_virtual 224 * is true, find a free subchannel id and device number across all 225 * subchannel sets from the default css image. 226 * If @p bus_id is not valid, and if both @p squash_mcss and @p is_virtual 227 * are false, find a non-full css image and find a free subchannel id and 228 * device number across all subchannel sets from it. 229 * 230 * If either of the former actions succeed, allocate a subchannel structure, 231 * initialise it with the bus id, subchannel id and device number, register 232 * it with the CSS and return it. Otherwise return NULL. 233 * 234 * The caller becomes owner of the returned subchannel structure and 235 * is responsible for unregistering and freeing it. 236 */ 237 SubchDev *css_create_sch(CssDevId bus_id, bool is_virtual, bool squash_mcss, 238 Error **errp); 239 240 /** Turn on css migration */ 241 void css_register_vmstate(void); 242 243 #endif 244