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 #define VIRTIO_CCW_CHPID 0 /* used by convention */ 32 33 typedef struct CIW { 34 uint8_t type; 35 uint8_t command; 36 uint16_t count; 37 } QEMU_PACKED CIW; 38 39 typedef struct SenseId { 40 /* common part */ 41 uint8_t reserved; /* always 0x'FF' */ 42 uint16_t cu_type; /* control unit type */ 43 uint8_t cu_model; /* control unit model */ 44 uint16_t dev_type; /* device type */ 45 uint8_t dev_model; /* device model */ 46 uint8_t unused; /* padding byte */ 47 /* extended part */ 48 CIW ciw[MAX_CIWS]; /* variable # of CIWs */ 49 } QEMU_PACKED SenseId; 50 51 /* Channel measurements, from linux/drivers/s390/cio/cmf.c. */ 52 typedef struct CMB { 53 uint16_t ssch_rsch_count; 54 uint16_t sample_count; 55 uint32_t device_connect_time; 56 uint32_t function_pending_time; 57 uint32_t device_disconnect_time; 58 uint32_t control_unit_queuing_time; 59 uint32_t device_active_only_time; 60 uint32_t reserved[2]; 61 } QEMU_PACKED CMB; 62 63 typedef struct CMBE { 64 uint32_t ssch_rsch_count; 65 uint32_t sample_count; 66 uint32_t device_connect_time; 67 uint32_t function_pending_time; 68 uint32_t device_disconnect_time; 69 uint32_t control_unit_queuing_time; 70 uint32_t device_active_only_time; 71 uint32_t device_busy_time; 72 uint32_t initial_command_response_time; 73 uint32_t reserved[7]; 74 } QEMU_PACKED CMBE; 75 76 typedef struct SubchDev SubchDev; 77 struct SubchDev { 78 /* channel-subsystem related things: */ 79 uint8_t cssid; 80 uint8_t ssid; 81 uint16_t schid; 82 uint16_t devno; 83 SCHIB curr_status; 84 uint8_t sense_data[32]; 85 hwaddr channel_prog; 86 CCW1 last_cmd; 87 bool last_cmd_valid; 88 bool ccw_fmt_1; 89 bool thinint_active; 90 uint8_t ccw_no_data_cnt; 91 /* transport-provided data: */ 92 int (*ccw_cb) (SubchDev *, CCW1); 93 void (*disable_cb)(SubchDev *); 94 SenseId id; 95 void *driver_data; 96 }; 97 98 typedef struct IndAddr { 99 hwaddr addr; 100 uint64_t map; 101 unsigned long refcnt; 102 int len; 103 QTAILQ_ENTRY(IndAddr) sibling; 104 } IndAddr; 105 106 IndAddr *get_indicator(hwaddr ind_addr, int len); 107 void release_indicator(AdapterInfo *adapter, IndAddr *indicator); 108 int map_indicator(AdapterInfo *adapter, IndAddr *indicator); 109 110 typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid, 111 uint16_t schid); 112 void subch_device_save(SubchDev *s, QEMUFile *f); 113 int subch_device_load(SubchDev *s, QEMUFile *f); 114 int css_create_css_image(uint8_t cssid, bool default_image); 115 bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno); 116 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid, 117 uint16_t devno, SubchDev *sch); 118 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type); 119 unsigned int css_find_free_chpid(uint8_t cssid); 120 uint16_t css_build_subchannel_id(SubchDev *sch); 121 void css_reset(void); 122 void css_reset_sch(SubchDev *sch); 123 void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid); 124 void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid, 125 int hotplugged, int add); 126 void css_generate_chp_crws(uint8_t cssid, uint8_t chpid); 127 void css_generate_css_crws(uint8_t cssid); 128 void css_clear_sei_pending(void); 129 void css_adapter_interrupt(uint8_t isc); 130 131 typedef enum { 132 CSS_IO_ADAPTER_VIRTIO = 0, 133 CSS_IO_ADAPTER_PCI = 1, 134 CSS_IO_ADAPTER_TYPE_NUMS, 135 } CssIoAdapterType; 136 137 uint32_t css_get_adapter_id(CssIoAdapterType type, uint8_t isc); 138 void css_register_io_adapters(CssIoAdapterType type, bool swap, bool maskable, 139 Error **errp); 140 141 #ifndef CONFIG_USER_ONLY 142 SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, 143 uint16_t schid); 144 bool css_subch_visible(SubchDev *sch); 145 void css_conditional_io_interrupt(SubchDev *sch); 146 int css_do_stsch(SubchDev *sch, SCHIB *schib); 147 bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); 148 int css_do_msch(SubchDev *sch, const SCHIB *schib); 149 int css_do_xsch(SubchDev *sch); 150 int css_do_csch(SubchDev *sch); 151 int css_do_hsch(SubchDev *sch); 152 int css_do_ssch(SubchDev *sch, ORB *orb); 153 int css_do_tsch_get_irb(SubchDev *sch, IRB *irb, int *irb_len); 154 void css_do_tsch_update_subch(SubchDev *sch); 155 int css_do_stcrw(CRW *crw); 156 void css_undo_stcrw(CRW *crw); 157 int css_do_tpi(IOIntCode *int_code, int lowcore); 158 int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid, 159 int rfmt, void *buf); 160 void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo); 161 int css_enable_mcsse(void); 162 int css_enable_mss(void); 163 int css_do_rsch(SubchDev *sch); 164 int css_do_rchp(uint8_t cssid, uint8_t chpid); 165 bool css_present(uint8_t cssid); 166 #endif 167 /* 168 * Identify a device within the channel subsystem. 169 * Note that this can be used to identify either the subchannel or 170 * the attached I/O device, as there's always one I/O device per 171 * subchannel. 172 */ 173 typedef struct CssDevId { 174 uint8_t cssid; 175 uint8_t ssid; 176 uint16_t devid; 177 bool valid; 178 } CssDevId; 179 180 extern PropertyInfo css_devid_propinfo; 181 182 #define DEFINE_PROP_CSS_DEV_ID(_n, _s, _f) \ 183 DEFINE_PROP(_n, _s, _f, css_devid_propinfo, CssDevId) 184 185 extern PropertyInfo css_devid_ro_propinfo; 186 187 #define DEFINE_PROP_CSS_DEV_ID_RO(_n, _s, _f) \ 188 DEFINE_PROP(_n, _s, _f, css_devid_ro_propinfo, CssDevId) 189 190 /** 191 * Create a subchannel for the given bus id. 192 * 193 * If @p bus_id is valid, verify that it uses the virtual channel 194 * subsystem id and is not already in use, and find a free subchannel 195 * id for it. If @p bus_id is not valid, find a free subchannel id and 196 * device number across all subchannel sets. If either of the former 197 * actions succeed, allocate a subchannel structure, initialise it 198 * with the bus id, subchannel id and device number, register it with 199 * the CSS and return it. Otherwise return NULL. 200 * 201 * The caller becomes owner of the returned subchannel structure and 202 * is responsible for unregistering and freeing it. 203 */ 204 SubchDev *css_create_virtual_sch(CssDevId bus_id, Error **errp); 205 #endif 206