LXR qemu/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
  25typedef struct CIW {
  26    uint8_t type;
  27    uint8_t command;
  28    uint16_t count;
  29} QEMU_PACKED CIW;
  30
  31typedef 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. */
  44typedef 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
  55typedef 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
  68struct 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    ORB *orb;
  80    /* transport-provided data: */
  81    int (*ccw_cb) (SubchDev *, CCW1);
  82    SenseId id;
  83    void *driver_data;
  84};
  85
  86typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,
  87                                       uint16_t schid);
  88int css_create_css_image(uint8_t cssid, bool default_image);
  89bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
  90void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
  91                      uint16_t devno, SubchDev *sch);
  92void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);
  93void css_reset(void);
  94void css_reset_sch(SubchDev *sch);
  95void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);
  96void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
  97                           int hotplugged, int add);
  98void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);
  99#endif
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