hw/s390x/css.h

   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 "ioinst.h"
  18
  19 /* Channel subsystem constants. */
  20 #define MAX_SCHID 65535
  21 #define MAX_SSID 3
  22 #define MAX_CSSID 254 /* 255 is reserved */
  23 #define MAX_CHPID 255
  24
  25 #define MAX_CIWS 62
  26
  27 typedef struct CIW {
  28     uint8_t type;
  29     uint8_t command;
  30     uint16_t count;
  31 } QEMU_PACKED CIW;
  32
  33 typedef struct SenseId {
  34     /* common part */
  35     uint8_t reserved;        /* always 0x'FF' */
  36     uint16_t cu_type;        /* control unit type */
  37     uint8_t cu_model;        /* control unit model */
  38     uint16_t dev_type;       /* device type */
  39     uint8_t dev_model;       /* device model */
  40     uint8_t unused;          /* padding byte */
  41     /* extended part */
  42     CIW ciw[MAX_CIWS];       /* variable # of CIWs */
  43 } QEMU_PACKED SenseId;
  44
  45 /* Channel measurements, from linux/drivers/s390/cio/cmf.c. */
  46 typedef struct CMB {
  47     uint16_t ssch_rsch_count;
  48     uint16_t sample_count;
  49     uint32_t device_connect_time;
  50     uint32_t function_pending_time;
  51     uint32_t device_disconnect_time;
  52     uint32_t control_unit_queuing_time;
  53     uint32_t device_active_only_time;
  54     uint32_t reserved[2];
  55 } QEMU_PACKED CMB;
  56
  57 typedef struct CMBE {
  58     uint32_t ssch_rsch_count;
  59     uint32_t sample_count;
  60     uint32_t device_connect_time;
  61     uint32_t function_pending_time;
  62     uint32_t device_disconnect_time;
  63     uint32_t control_unit_queuing_time;
  64     uint32_t device_active_only_time;
  65     uint32_t device_busy_time;
  66     uint32_t initial_command_response_time;
  67     uint32_t reserved[7];
  68 } QEMU_PACKED CMBE;
  69
  70 struct SubchDev {
  71     /* channel-subsystem related things: */
  72     uint8_t cssid;
  73     uint8_t ssid;
  74     uint16_t schid;
  75     uint16_t devno;
  76     SCHIB curr_status;
  77     uint8_t sense_data[32];
  78     hwaddr channel_prog;
  79     CCW1 last_cmd;
  80     bool last_cmd_valid;
  81     bool ccw_fmt_1;
  82     bool thinint_active;
  83     uint8_t ccw_no_data_cnt;
  84     /* transport-provided data: */
  85     int (*ccw_cb) (SubchDev *, CCW1);
  86     void (*disable_cb)(SubchDev *);
  87     SenseId id;
  88     void *driver_data;
  89 };
  90
  91 typedef struct IndAddr {
  92     hwaddr addr;
  93     uint64_t map;
  94     unsigned long refcnt;
  95     int len;
  96     QTAILQ_ENTRY(IndAddr) sibling;
  97 } IndAddr;
  98
  99 IndAddr *get_indicator(hwaddr ind_addr, int len);
 100 void release_indicator(AdapterInfo *adapter, IndAddr *indicator);
 101 int map_indicator(AdapterInfo *adapter, IndAddr *indicator);
 102
 103 typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,
 104                                        uint16_t schid);
 105 void subch_device_save(SubchDev *s, QEMUFile *f);
 106 int subch_device_load(SubchDev *s, QEMUFile *f);
 107 int css_create_css_image(uint8_t cssid, bool default_image);
 108 bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
 109 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
 110                       uint16_t devno, SubchDev *sch);
 111 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);
 112 uint16_t css_build_subchannel_id(SubchDev *sch);
 113 void css_reset(void);
 114 void css_reset_sch(SubchDev *sch);
 115 void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);
 116 void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
 117                            int hotplugged, int add);
 118 void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);
 119 void css_generate_css_crws(uint8_t cssid);
 120 void css_clear_sei_pending(void);
 121 void css_adapter_interrupt(uint8_t isc);
 122
 123 #define CSS_IO_ADAPTER_VIRTIO 1
 124 int css_register_io_adapter(uint8_t type, uint8_t isc, bool swap,
 125                             bool maskable, uint32_t *id);
 126 #endif