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 "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
  27typedef struct CIW {
  28    uint8_t type;
  29    uint8_t command;
  30    uint16_t count;
  31} QEMU_PACKED CIW;
  32
  33typedef 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. */
  46typedef 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
  57typedef 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
  70struct 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
  91typedef struct IndAddr {
  92    hwaddr addr;
  93    uint64_t map;
  94    unsigned long refcnt;
  95    int len;
  96    QTAILQ_ENTRY(IndAddr) sibling;
  97} IndAddr;
  98
  99IndAddr *get_indicator(hwaddr ind_addr, int len);
 100void release_indicator(AdapterInfo *adapter, IndAddr *indicator);
 101int map_indicator(AdapterInfo *adapter, IndAddr *indicator);
 102
 103typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,
 104                                       uint16_t schid);
 105void subch_device_save(SubchDev *s, QEMUFile *f);
 106int subch_device_load(SubchDev *s, QEMUFile *f);
 107int css_create_css_image(uint8_t cssid, bool default_image);
 108bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
 109void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
 110                      uint16_t devno, SubchDev *sch);
 111void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);
 112uint16_t css_build_subchannel_id(SubchDev *sch);
 113void css_reset(void);
 114void css_reset_sch(SubchDev *sch);
 115void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);
 116void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
 117                           int hotplugged, int add);
 118void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);
 119void css_generate_css_crws(uint8_t cssid);
 120void css_clear_sei_pending(void);
 121void css_adapter_interrupt(uint8_t isc);
 122
 123#define CSS_IO_ADAPTER_VIRTIO 1
 124int css_register_io_adapter(uint8_t type, uint8_t isc, bool swap,
 125                            bool maskable, uint32_t *id);
 126#endif
 127