477a72a1ef
Code restructure in order to simplify class hierarchy
- remove S390SCLPDevice abstract base class
and move function pointers into new SCLPEventFacilityClass
- implement SCLPEventFacility as SysBusDevice
- use define constants for instance creation strings
The following ascii-art shows the class structure wrt the SCLP EventFacility
before (CURRENT) and after the restructure (NEW):
----
CURRENT:
"s390-sclp-events-bus"
+-------------------------+
| SCLPEventsBus |
|-------------------------|
|BusState qbus |
+-------------------------+
+-------------------------+
| SCLPEventFacility | - to be replaced by new SCLPEventFacility,
|-------------------------| which will be a SysBusDevice
|SCLPEventsBus sbus |
|DeviceState *qdev |
|unsigned int receive_mask|
+-------------------------+
+-------------------------+
| S390SCLPDeviceClass | - to be replaced by new SCLPEventFacilityClass
|-------------------------|
|DeviceClass qdev |
|*(init)() |
+-------------------------+
"s390-sclp-event-facility"
|
instance-of
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V
"s390-sclp-device" - this is an abstract class
+-------------------------+
| S390SCLPDevice (A)| - to be replaced by new SCLPEventFacility
|-------------------------|
|SysBusDevice busdev |
|SCLPEventFacility *ef |
| |
|*(sclp_command_handler)()| - these 2 go to new SCLPEventFacilityClass
|*(event_pending)() |
+-------------------------+
----
NEW:
"s390-sclp-events-bus"
+-------------------------+
| SCLPEventsBus |
|-------------------------|
|BusState qbus |
+-------------------------+
+-------------------------+
| SCLPEventFacilityClass |
|-------------------------|
|DeviceClass parent_class |
| |
|*(init)() |
|*(command_handler)() |
|*(event_pending)() |
+-------------------------+
"s390-sclp-event-facility"
+-------------------------+
| SCLPEventFacility |
|-------------------------|
|SysBusDevice parent_class|
|SCLPEventsBus sbus |
|unsigned int receive_mask|
+-------------------------+
Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
170 lines
5.5 KiB
C
170 lines
5.5 KiB
C
/*
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* SCLP Support
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*
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* Copyright IBM, Corp. 2012
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*
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* Authors:
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* Christian Borntraeger <borntraeger@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 your
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* option) any later version. See the COPYING file in the top-level directory.
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*
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*/
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#ifndef HW_S390_SCLP_H
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#define HW_S390_SCLP_H
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#include <hw/sysbus.h>
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#include <hw/qdev.h>
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#define SCLP_CMD_CODE_MASK 0xffff00ff
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/* SCLP command codes */
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#define SCLP_CMDW_READ_SCP_INFO 0x00020001
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#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
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#define SCLP_READ_STORAGE_ELEMENT_INFO 0x00040001
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#define SCLP_ATTACH_STORAGE_ELEMENT 0x00080001
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#define SCLP_ASSIGN_STORAGE 0x000D0001
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#define SCLP_UNASSIGN_STORAGE 0x000C0001
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#define SCLP_CMD_READ_EVENT_DATA 0x00770005
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#define SCLP_CMD_WRITE_EVENT_DATA 0x00760005
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#define SCLP_CMD_READ_EVENT_DATA 0x00770005
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#define SCLP_CMD_WRITE_EVENT_DATA 0x00760005
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#define SCLP_CMD_WRITE_EVENT_MASK 0x00780005
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/* SCLP Memory hotplug codes */
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#define SCLP_FC_ASSIGN_ATTACH_READ_STOR 0xE00000000000ULL
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#define SCLP_STARTING_SUBINCREMENT_ID 0x10001
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#define SCLP_INCREMENT_UNIT 0x10000
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#define MAX_AVAIL_SLOTS 32
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/* CPU hotplug SCLP codes */
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#define SCLP_HAS_CPU_INFO 0x0C00000000000000ULL
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#define SCLP_CMDW_READ_CPU_INFO 0x00010001
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#define SCLP_CMDW_CONFIGURE_CPU 0x00110001
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#define SCLP_CMDW_DECONFIGURE_CPU 0x00100001
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/* SCLP response codes */
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#define SCLP_RC_NORMAL_READ_COMPLETION 0x0010
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#define SCLP_RC_NORMAL_COMPLETION 0x0020
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#define SCLP_RC_SCCB_BOUNDARY_VIOLATION 0x0100
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#define SCLP_RC_INVALID_SCLP_COMMAND 0x01f0
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#define SCLP_RC_CONTAINED_EQUIPMENT_CHECK 0x0340
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#define SCLP_RC_INSUFFICIENT_SCCB_LENGTH 0x0300
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#define SCLP_RC_STANDBY_READ_COMPLETION 0x0410
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#define SCLP_RC_INVALID_FUNCTION 0x40f0
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#define SCLP_RC_NO_EVENT_BUFFERS_STORED 0x60f0
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#define SCLP_RC_INVALID_SELECTION_MASK 0x70f0
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#define SCLP_RC_INCONSISTENT_LENGTHS 0x72f0
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#define SCLP_RC_EVENT_BUFFER_SYNTAX_ERROR 0x73f0
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#define SCLP_RC_INVALID_MASK_LENGTH 0x74f0
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/* Service Call Control Block (SCCB) and its elements */
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#define SCCB_SIZE 4096
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#define SCLP_VARIABLE_LENGTH_RESPONSE 0x80
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#define SCLP_EVENT_BUFFER_ACCEPTED 0x80
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#define SCLP_FC_NORMAL_WRITE 0
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/*
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* Normally packed structures are not the right thing to do, since all code
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* must take care of endianness. We cannot use ldl_phys and friends for two
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* reasons, though:
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* - some of the embedded structures below the SCCB can appear multiple times
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* at different locations, so there is no fixed offset
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* - we work on a private copy of the SCCB, since there are several length
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* fields, that would cause a security nightmare if we allow the guest to
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* alter the structure while we parse it. We cannot use ldl_p and friends
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* either without doing pointer arithmetics
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* So we have to double check that all users of sclp data structures use the
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* right endianness wrappers.
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*/
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typedef struct SCCBHeader {
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uint16_t length;
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uint8_t function_code;
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uint8_t control_mask[3];
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uint16_t response_code;
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} QEMU_PACKED SCCBHeader;
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#define SCCB_DATA_LEN (SCCB_SIZE - sizeof(SCCBHeader))
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/* CPU information */
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typedef struct CPUEntry {
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uint8_t address;
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uint8_t reserved0[13];
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uint8_t type;
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uint8_t reserved1;
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} QEMU_PACKED CPUEntry;
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typedef struct ReadInfo {
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SCCBHeader h;
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uint16_t rnmax;
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uint8_t rnsize;
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uint8_t _reserved1[16 - 11]; /* 11-15 */
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uint16_t entries_cpu; /* 16-17 */
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uint16_t offset_cpu; /* 18-19 */
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uint8_t _reserved2[24 - 20]; /* 20-23 */
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uint8_t loadparm[8]; /* 24-31 */
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uint8_t _reserved3[48 - 32]; /* 32-47 */
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uint64_t facilities; /* 48-55 */
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uint8_t _reserved0[100 - 56];
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uint32_t rnsize2;
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uint64_t rnmax2;
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uint8_t _reserved4[120-112]; /* 112-119 */
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uint16_t highest_cpu;
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uint8_t _reserved5[128 - 122]; /* 122-127 */
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struct CPUEntry entries[0];
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} QEMU_PACKED ReadInfo;
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typedef struct ReadCpuInfo {
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SCCBHeader h;
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uint16_t nr_configured; /* 8-9 */
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uint16_t offset_configured; /* 10-11 */
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uint16_t nr_standby; /* 12-13 */
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uint16_t offset_standby; /* 14-15 */
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uint8_t reserved0[24-16]; /* 16-23 */
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struct CPUEntry entries[0];
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} QEMU_PACKED ReadCpuInfo;
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typedef struct ReadStorageElementInfo {
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SCCBHeader h;
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uint16_t max_id;
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uint16_t assigned;
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uint16_t standby;
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uint8_t _reserved0[16 - 14]; /* 14-15 */
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uint32_t entries[0];
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} QEMU_PACKED ReadStorageElementInfo;
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typedef struct AttachStorageElement {
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SCCBHeader h;
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uint8_t _reserved0[10 - 8]; /* 8-9 */
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uint16_t assigned;
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uint8_t _reserved1[16 - 12]; /* 12-15 */
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uint32_t entries[0];
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} QEMU_PACKED AttachStorageElement;
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typedef struct AssignStorage {
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SCCBHeader h;
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uint16_t rn;
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} QEMU_PACKED AssignStorage;
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typedef struct SCCB {
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SCCBHeader h;
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char data[SCCB_DATA_LEN];
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} QEMU_PACKED SCCB;
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static inline int sccb_data_len(SCCB *sccb)
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{
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return be16_to_cpu(sccb->h.length) - sizeof(sccb->h);
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}
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void s390_sclp_init(void);
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void sclp_service_interrupt(uint32_t sccb);
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void raise_irq_cpu_hotplug(void);
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#endif
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