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s390: Virtual channel subsystem support.

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Provide a mechanism for qemu to provide fully virtual subchannels to
the guest.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Cornelia Huck 2013-01-24 02:28:06 +00:00 • committed by Alexander Graf
parent 7b18aad543
commit df1fe5bb49
5 changed files with 1447 additions and 0 deletions
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1
hw/s390x/Makefile.objs
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@ -6,3 +6,4 @@ obj-y += sclp.o
obj-y += event-facility.o
obj-y += sclpquiesce.o sclpconsole.o
obj-y += ipl.o
obj-y += css.o

1277
hw/s390x/css.c Normal file
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File diff suppressed because it is too large Load diff

99
hw/s390x/css.h Normal file
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@ -0,0 +1,99 @@
/*
* Channel subsystem structures and definitions.
*
* Copyright 2012 IBM Corp.
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#ifndef CSS_H
#define CSS_H
#include "ioinst.h"
/* Channel subsystem constants. */
#define MAX_SCHID 65535
#define MAX_SSID 3
#define MAX_CSSID 254 /* 255 is reserved */
#define MAX_CHPID 255
#define MAX_CIWS 62
typedef struct CIW {
uint8_t type;
uint8_t command;
uint16_t count;
} QEMU_PACKED CIW;
typedef struct SenseId {
/* common part */
uint8_t reserved; /* always 0x'FF' */
uint16_t cu_type; /* control unit type */
uint8_t cu_model; /* control unit model */
uint16_t dev_type; /* device type */
uint8_t dev_model; /* device model */
uint8_t unused; /* padding byte */
/* extended part */
CIW ciw[MAX_CIWS]; /* variable # of CIWs */
} QEMU_PACKED SenseId;
/* Channel measurements, from linux/drivers/s390/cio/cmf.c. */
typedef struct CMB {
uint16_t ssch_rsch_count;
uint16_t sample_count;
uint32_t device_connect_time;
uint32_t function_pending_time;
uint32_t device_disconnect_time;
uint32_t control_unit_queuing_time;
uint32_t device_active_only_time;
uint32_t reserved[2];
} QEMU_PACKED CMB;
typedef struct CMBE {
uint32_t ssch_rsch_count;
uint32_t sample_count;
uint32_t device_connect_time;
uint32_t function_pending_time;
uint32_t device_disconnect_time;
uint32_t control_unit_queuing_time;
uint32_t device_active_only_time;
uint32_t device_busy_time;
uint32_t initial_command_response_time;
uint32_t reserved[7];
} QEMU_PACKED CMBE;
struct SubchDev {
/* channel-subsystem related things: */
uint8_t cssid;
uint8_t ssid;
uint16_t schid;
uint16_t devno;
SCHIB curr_status;
uint8_t sense_data[32];
hwaddr channel_prog;
CCW1 last_cmd;
bool last_cmd_valid;
ORB *orb;
/* transport-provided data: */
int (*ccw_cb) (SubchDev *, CCW1);
SenseId id;
void *driver_data;
};
typedef SubchDev *(*css_subch_cb_func)(uint8_t m, uint8_t cssid, uint8_t ssid,
uint16_t schid);
int css_create_css_image(uint8_t cssid, bool default_image);
bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
uint16_t devno, SubchDev *sch);
void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);
void css_reset(void);
void css_reset_sch(SubchDev *sch);
void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid);
void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
int hotplugged, int add);
void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);
#endif