e8601dd5d0
We must not allow chains of more than 255 ccws without data transfer. Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
/*
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* Channel subsystem structures and definitions.
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*
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* Copyright 2012 IBM Corp.
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* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef CSS_H
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#define CSS_H
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#include "ioinst.h"
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/* Channel subsystem constants. */
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#define MAX_SCHID 65535
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#define MAX_SSID 3
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#define MAX_CSSID 254 /* 255 is reserved */
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#define MAX_CHPID 255
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#define MAX_CIWS 62
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typedef struct CIW {
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uint8_t type;
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uint8_t command;
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uint16_t count;
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} QEMU_PACKED CIW;
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typedef struct SenseId {
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/* common part */
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uint8_t reserved; /* always 0x'FF' */
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uint16_t cu_type; /* control unit type */
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uint8_t cu_model; /* control unit model */
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uint16_t dev_type; /* device type */
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uint8_t dev_model; /* device model */
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uint8_t unused; /* padding byte */
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/* extended part */
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CIW ciw[MAX_CIWS]; /* variable # of CIWs */
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} QEMU_PACKED SenseId;
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/* Channel measurements, from linux/drivers/s390/cio/cmf.c. */
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typedef struct CMB {
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uint16_t ssch_rsch_count;
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uint16_t sample_count;
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uint32_t device_connect_time;
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uint32_t function_pending_time;
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uint32_t device_disconnect_time;
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uint32_t control_unit_queuing_time;
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uint32_t device_active_only_time;
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uint32_t reserved[2];
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} QEMU_PACKED CMB;
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typedef struct CMBE {
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uint32_t ssch_rsch_count;
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uint32_t sample_count;
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uint32_t device_connect_time;
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uint32_t function_pending_time;
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uint32_t device_disconnect_time;
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uint32_t control_unit_queuing_time;
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uint32_t device_active_only_time;
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uint32_t device_busy_time;
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uint32_t initial_command_response_time;
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uint32_t reserved[7];
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} QEMU_PACKED CMBE;
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struct SubchDev {
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/* channel-subsystem related things: */
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uint8_t cssid;
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uint8_t ssid;
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uint16_t schid;
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uint16_t devno;
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SCHIB curr_status;
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uint8_t sense_data[32];
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hwaddr channel_prog;
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CCW1 last_cmd;
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bool last_cmd_valid;
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bool ccw_fmt_1;
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bool thinint_active;
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uint8_t ccw_no_data_cnt;
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/* transport-provided data: */
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int (*ccw_cb) (SubchDev *, CCW1);
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SenseId id;
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void *driver_data;
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};
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typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,
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uint16_t schid);
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void subch_device_save(SubchDev *s, QEMUFile *f);
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int subch_device_load(SubchDev *s, QEMUFile *f);
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int css_create_css_image(uint8_t cssid, bool default_image);
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bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
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void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
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uint16_t devno, SubchDev *sch);
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void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);
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uint16_t css_build_subchannel_id(SubchDev *sch);
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void css_reset(void);
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void css_reset_sch(SubchDev *sch);
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void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);
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void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
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int hotplugged, int add);
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void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);
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void css_adapter_interrupt(uint8_t isc);
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#define CSS_IO_ADAPTER_VIRTIO 1
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int css_register_io_adapter(uint8_t type, uint8_t isc, bool swap,
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bool maskable, uint32_t *id);
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#endif
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