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 "ioinst.h"
  16
  17 /* Channel subsystem constants. */
  18 #define MAX_SCHID 65535
  19 #define MAX_SSID 3
  20 #define MAX_CSSID 254 /* 255 is reserved */
  21 #define MAX_CHPID 255
  22
  23 #define MAX_CIWS 62
  24
  25 typedef struct CIW {
  26     uint8_t type;
  27     uint8_t command;
  28     uint16_t count;
  29 } QEMU_PACKED CIW;
  30
  31 typedef struct SenseId {
  32     /* common part */
  33     uint8_t reserved;        /* always 0x'FF' */
  34     uint16_t cu_type;        /* control unit type */
  35     uint8_t cu_model;        /* control unit model */
  36     uint16_t dev_type;       /* device type */
  37     uint8_t dev_model;       /* device model */
  38     uint8_t unused;          /* padding byte */
  39     /* extended part */
  40     CIW ciw[MAX_CIWS];       /* variable # of CIWs */
  41 } QEMU_PACKED SenseId;
  42
  43 /* Channel measurements, from linux/drivers/s390/cio/cmf.c. */
  44 typedef struct CMB {
  45     uint16_t ssch_rsch_count;
  46     uint16_t sample_count;
  47     uint32_t device_connect_time;
  48     uint32_t function_pending_time;
  49     uint32_t device_disconnect_time;
  50     uint32_t control_unit_queuing_time;
  51     uint32_t device_active_only_time;
  52     uint32_t reserved[2];
  53 } QEMU_PACKED CMB;
  54
  55 typedef struct CMBE {
  56     uint32_t ssch_rsch_count;
  57     uint32_t sample_count;
  58     uint32_t device_connect_time;
  59     uint32_t function_pending_time;
  60     uint32_t device_disconnect_time;
  61     uint32_t control_unit_queuing_time;
  62     uint32_t device_active_only_time;
  63     uint32_t device_busy_time;
  64     uint32_t initial_command_response_time;
  65     uint32_t reserved[7];
  66 } QEMU_PACKED CMBE;
  67
  68 struct SubchDev {
  69     /* channel-subsystem related things: */
  70     uint8_t cssid;
  71     uint8_t ssid;
  72     uint16_t schid;
  73     uint16_t devno;
  74     SCHIB curr_status;
  75     uint8_t sense_data[32];
  76     hwaddr channel_prog;
  77     CCW1 last_cmd;
  78     bool last_cmd_valid;
  79     bool thinint_active;
  80     /* transport-provided data: */
  81     int (*ccw_cb) (SubchDev *, CCW1);
  82     SenseId id;
  83     void *driver_data;
  84 };
  85
  86 typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,
  87                                        uint16_t schid);
  88 void subch_device_save(SubchDev *s, QEMUFile *f);
  89 int subch_device_load(SubchDev *s, QEMUFile *f);
  90 int css_create_css_image(uint8_t cssid, bool default_image);
  91 bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
  92 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
  93                       uint16_t devno, SubchDev *sch);
  94 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);
  95 uint16_t css_build_subchannel_id(SubchDev *sch);
  96 void css_reset(void);
  97 void css_reset_sch(SubchDev *sch);
  98 void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);
  99 void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
 100                            int hotplugged, int add);
 101 void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);
 102 void css_adapter_interrupt(uint8_t isc);
 103
 104 #define CSS_IO_ADAPTER_VIRTIO 1
 105 int css_register_io_adapter(uint8_t type, uint8_t isc, bool swap,
 106                             bool maskable, uint32_t *id);
 107 #endif