8129ee1642
New feature V=V qdio pass-through. QDIO and HiperSockets processing in z/VM V=V guest environments (as well as V=R with z/VM running in LPAR mode) requires shadowing of all QDIO architecture queue elements. Especially the shadowing of SBALs and SLSBs structures in the hypervisor, and the need to issue SIGA SYNC operations to observe state changes, eventually causes significant CPU processing overhead in the hypervisor. The QDIO pass-through support for V=V guests avoids the shadowing of SBALs and SLSBs. This significantly reduces the hypervisor overhead for QDIO based I/O. Signed-off-by: Frank Pavlic <pavlic@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
403 lines
13 KiB
C
403 lines
13 KiB
C
/*
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* linux/include/asm/qdio.h
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*
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* Linux for S/390 QDIO base support, Hipersocket base support
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* version 2
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*
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* Copyright 2000,2002 IBM Corporation
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* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
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*
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*/
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#ifndef __QDIO_H__
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#define __QDIO_H__
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#define VERSION_QDIO_H "$Revision: 1.57 $"
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/* note, that most of the typedef's are from ingo. */
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#include <linux/interrupt.h>
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#include <asm/cio.h>
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#include <asm/ccwdev.h>
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#define QDIO_NAME "qdio "
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#ifndef __s390x__
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#define QDIO_32_BIT
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#endif /* __s390x__ */
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/**** CONSTANTS, that are relied on without using these symbols *****/
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#define QDIO_MAX_QUEUES_PER_IRQ 32 /* used in width of unsigned int */
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/************************ END of CONSTANTS **************************/
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#define QDIO_MAX_BUFFERS_PER_Q 128 /* must be a power of 2 (%x=&(x-1)*/
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#define QDIO_BUF_ORDER 7 /* 2**this == number of pages used for sbals in 1 q */
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#define QDIO_MAX_ELEMENTS_PER_BUFFER 16
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#define SBAL_SIZE 256
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#define QDIO_QETH_QFMT 0
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#define QDIO_ZFCP_QFMT 1
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#define QDIO_IQDIO_QFMT 2
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struct qdio_buffer_element{
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unsigned int flags;
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unsigned int length;
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#ifdef QDIO_32_BIT
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void *reserved;
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#endif /* QDIO_32_BIT */
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void *addr;
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} __attribute__ ((packed,aligned(16)));
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struct qdio_buffer{
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volatile struct qdio_buffer_element element[16];
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} __attribute__ ((packed,aligned(256)));
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/* params are: ccw_device, status, qdio_error, siga_error,
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queue_number, first element processed, number of elements processed,
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int_parm */
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typedef void qdio_handler_t(struct ccw_device *,unsigned int,unsigned int,
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unsigned int,unsigned int,int,int,unsigned long);
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#define QDIO_STATUS_INBOUND_INT 0x01
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#define QDIO_STATUS_OUTBOUND_INT 0x02
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#define QDIO_STATUS_LOOK_FOR_ERROR 0x04
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#define QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR 0x08
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#define QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR 0x10
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#define QDIO_STATUS_ACTIVATE_CHECK_CONDITION 0x20
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#define QDIO_SIGA_ERROR_ACCESS_EXCEPTION 0x10
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#define QDIO_SIGA_ERROR_B_BIT_SET 0x20
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/* for qdio_initialize */
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#define QDIO_INBOUND_0COPY_SBALS 0x01
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#define QDIO_OUTBOUND_0COPY_SBALS 0x02
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#define QDIO_USE_OUTBOUND_PCIS 0x04
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/* for qdio_cleanup */
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#define QDIO_FLAG_CLEANUP_USING_CLEAR 0x01
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#define QDIO_FLAG_CLEANUP_USING_HALT 0x02
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struct qdio_initialize {
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struct ccw_device *cdev;
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unsigned char q_format;
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unsigned char adapter_name[8];
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unsigned int qib_param_field_format; /*adapter dependent*/
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/* pointer to 128 bytes or NULL, if no param field */
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unsigned char *qib_param_field; /* adapter dependent */
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/* pointer to no_queues*128 words of data or NULL */
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unsigned long *input_slib_elements;
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unsigned long *output_slib_elements;
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unsigned int min_input_threshold;
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unsigned int max_input_threshold;
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unsigned int min_output_threshold;
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unsigned int max_output_threshold;
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unsigned int no_input_qs;
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unsigned int no_output_qs;
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qdio_handler_t *input_handler;
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qdio_handler_t *output_handler;
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unsigned long int_parm;
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unsigned long flags;
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void **input_sbal_addr_array; /* addr of n*128 void ptrs */
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void **output_sbal_addr_array; /* addr of n*128 void ptrs */
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};
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extern int qdio_initialize(struct qdio_initialize *init_data);
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extern int qdio_allocate(struct qdio_initialize *init_data);
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extern int qdio_establish(struct qdio_initialize *init_data);
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extern int qdio_activate(struct ccw_device *,int flags);
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#define QDIO_STATE_MUST_USE_OUTB_PCI 0x00000001
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#define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */
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#define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_initialize */
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#define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */
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#define QDIO_STATE_STOPPED 0x00000010 /* after queues went down */
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extern unsigned long qdio_get_status(int irq);
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#define QDIO_FLAG_SYNC_INPUT 0x01
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#define QDIO_FLAG_SYNC_OUTPUT 0x02
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#define QDIO_FLAG_UNDER_INTERRUPT 0x04
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#define QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT 0x08 /* no effect on
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adapter interrupts */
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#define QDIO_FLAG_DONT_SIGA 0x10
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extern int do_QDIO(struct ccw_device*, unsigned int flags,
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unsigned int queue_number,
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unsigned int qidx,unsigned int count,
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struct qdio_buffer *buffers);
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extern int qdio_synchronize(struct ccw_device*, unsigned int flags,
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unsigned int queue_number);
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extern int qdio_cleanup(struct ccw_device*, int how);
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extern int qdio_shutdown(struct ccw_device*, int how);
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extern int qdio_free(struct ccw_device*);
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unsigned char qdio_get_slsb_state(struct ccw_device*, unsigned int flag,
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unsigned int queue_number,
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unsigned int qidx);
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extern void qdio_init_scrubber(void);
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struct qdesfmt0 {
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#ifdef QDIO_32_BIT
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unsigned long res1; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long sliba; /* storage-list-information-block
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address */
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#ifdef QDIO_32_BIT
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unsigned long res2; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long sla; /* storage-list address */
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#ifdef QDIO_32_BIT
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unsigned long res3; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long slsba; /* storage-list-state-block address */
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unsigned int res4; /* reserved */
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unsigned int akey : 4; /* access key for DLIB */
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unsigned int bkey : 4; /* access key for SL */
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unsigned int ckey : 4; /* access key for SBALs */
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unsigned int dkey : 4; /* access key for SLSB */
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unsigned int res5 : 16; /* reserved */
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} __attribute__ ((packed));
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/*
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* Queue-Description record (QDR)
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*/
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struct qdr {
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unsigned int qfmt : 8; /* queue format */
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unsigned int pfmt : 8; /* impl. dep. parameter format */
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unsigned int res1 : 8; /* reserved */
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unsigned int ac : 8; /* adapter characteristics */
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unsigned int res2 : 8; /* reserved */
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unsigned int iqdcnt : 8; /* input-queue-descriptor count */
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unsigned int res3 : 8; /* reserved */
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unsigned int oqdcnt : 8; /* output-queue-descriptor count */
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unsigned int res4 : 8; /* reserved */
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unsigned int iqdsz : 8; /* input-queue-descriptor size */
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unsigned int res5 : 8; /* reserved */
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unsigned int oqdsz : 8; /* output-queue-descriptor size */
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unsigned int res6[9]; /* reserved */
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#ifdef QDIO_32_BIT
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unsigned long res7; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long qiba; /* queue-information-block address */
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unsigned int res8; /* reserved */
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unsigned int qkey : 4; /* queue-informatio-block key */
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unsigned int res9 : 28; /* reserved */
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/* union _qd {*/ /* why this? */
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struct qdesfmt0 qdf0[126];
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/* } qd;*/
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} __attribute__ ((packed,aligned(4096)));
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/*
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* queue information block (QIB)
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*/
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#define QIB_AC_INBOUND_PCI_SUPPORTED 0x80
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#define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40
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#define QIB_RFLAGS_ENABLE_QEBSM 0x80
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struct qib {
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unsigned int qfmt : 8; /* queue format */
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unsigned int pfmt : 8; /* impl. dep. parameter format */
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unsigned int rflags : 8; /* QEBSM */
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unsigned int ac : 8; /* adapter characteristics */
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unsigned int res2; /* reserved */
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#ifdef QDIO_32_BIT
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unsigned long res3; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long isliba; /* absolute address of 1st
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input SLIB */
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#ifdef QDIO_32_BIT
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unsigned long res4; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long osliba; /* absolute address of 1st
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output SLIB */
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unsigned int res5; /* reserved */
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unsigned int res6; /* reserved */
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unsigned char ebcnam[8]; /* adapter identifier in EBCDIC */
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unsigned char res7[88]; /* reserved */
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unsigned char parm[QDIO_MAX_BUFFERS_PER_Q];
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/* implementation dependent
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parameters */
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} __attribute__ ((packed,aligned(256)));
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/*
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* storage-list-information block element (SLIBE)
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*/
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struct slibe {
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#ifdef QDIO_32_BIT
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unsigned long res; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long parms; /* implementation dependent
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parameters */
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};
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/*
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* storage-list-information block (SLIB)
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*/
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struct slib {
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#ifdef QDIO_32_BIT
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unsigned long res1; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long nsliba; /* next SLIB address (if any) */
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#ifdef QDIO_32_BIT
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unsigned long res2; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long sla; /* SL address */
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#ifdef QDIO_32_BIT
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unsigned long res3; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long slsba; /* SLSB address */
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unsigned char res4[1000]; /* reserved */
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struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q]; /* SLIB elements */
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} __attribute__ ((packed,aligned(2048)));
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struct sbal_flags {
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unsigned char res1 : 1; /* reserved */
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unsigned char last : 1; /* last entry */
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unsigned char cont : 1; /* contiguous storage */
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unsigned char res2 : 1; /* reserved */
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unsigned char frag : 2; /* fragmentation (s.below) */
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unsigned char res3 : 2; /* reserved */
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} __attribute__ ((packed));
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#define SBAL_FLAGS_FIRST_FRAG 0x04000000UL
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#define SBAL_FLAGS_MIDDLE_FRAG 0x08000000UL
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#define SBAL_FLAGS_LAST_FRAG 0x0c000000UL
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#define SBAL_FLAGS_LAST_ENTRY 0x40000000UL
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#define SBAL_FLAGS_CONTIGUOUS 0x20000000UL
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#define SBAL_FLAGS0_DATA_CONTINUATION 0x20UL
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/* Awesome OpenFCP extensions */
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#define SBAL_FLAGS0_TYPE_STATUS 0x00UL
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#define SBAL_FLAGS0_TYPE_WRITE 0x08UL
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#define SBAL_FLAGS0_TYPE_READ 0x10UL
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#define SBAL_FLAGS0_TYPE_WRITE_READ 0x18UL
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#define SBAL_FLAGS0_MORE_SBALS 0x04UL
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#define SBAL_FLAGS0_COMMAND 0x02UL
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#define SBAL_FLAGS0_LAST_SBAL 0x00UL
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#define SBAL_FLAGS0_ONLY_SBAL SBAL_FLAGS0_COMMAND
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#define SBAL_FLAGS0_MIDDLE_SBAL SBAL_FLAGS0_MORE_SBALS
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#define SBAL_FLAGS0_FIRST_SBAL SBAL_FLAGS0_MORE_SBALS | SBAL_FLAGS0_COMMAND
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/* Naught of interest beyond this point */
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#define SBAL_FLAGS0_PCI 0x40
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struct sbal_sbalf_0 {
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unsigned char res1 : 1; /* reserved */
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unsigned char pci : 1; /* PCI indicator */
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unsigned char cont : 1; /* data continuation */
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unsigned char sbtype: 2; /* storage-block type (OpenFCP) */
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unsigned char res2 : 3; /* reserved */
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} __attribute__ ((packed));
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struct sbal_sbalf_1 {
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unsigned char res1 : 4; /* reserved */
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unsigned char key : 4; /* storage key */
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} __attribute__ ((packed));
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struct sbal_sbalf_14 {
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unsigned char res1 : 4; /* reserved */
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unsigned char erridx : 4; /* error index */
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} __attribute__ ((packed));
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struct sbal_sbalf_15 {
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unsigned char reason; /* reserved */
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} __attribute__ ((packed));
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union sbal_sbalf {
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struct sbal_sbalf_0 i0;
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struct sbal_sbalf_1 i1;
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struct sbal_sbalf_14 i14;
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struct sbal_sbalf_15 i15;
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unsigned char value;
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};
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struct sbal_element {
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union {
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struct sbal_flags bits; /* flags */
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unsigned char value;
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} flags;
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unsigned int res1 : 16; /* reserved */
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union sbal_sbalf sbalf; /* SBAL flags */
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unsigned int res2 : 16; /* reserved */
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unsigned int count : 16; /* data count */
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#ifdef QDIO_32_BIT
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unsigned long res3; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long addr; /* absolute data address */
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} __attribute__ ((packed,aligned(16)));
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/*
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* strorage-block access-list (SBAL)
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*/
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struct sbal {
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struct sbal_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
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} __attribute__ ((packed,aligned(256)));
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/*
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* storage-list (SL)
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*/
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struct sl_element {
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#ifdef QDIO_32_BIT
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unsigned long res; /* reserved */
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#endif /* QDIO_32_BIT */
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unsigned long sbal; /* absolute SBAL address */
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} __attribute__ ((packed));
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struct sl {
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struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
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} __attribute__ ((packed,aligned(1024)));
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/*
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* storage-list-state block (SLSB)
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*/
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struct slsb_flags {
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unsigned char owner : 2; /* SBAL owner */
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unsigned char type : 1; /* buffer type */
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unsigned char state : 5; /* processing state */
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} __attribute__ ((packed));
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struct slsb {
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union {
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unsigned char val[QDIO_MAX_BUFFERS_PER_Q];
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struct slsb_flags flags[QDIO_MAX_BUFFERS_PER_Q];
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} acc;
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} __attribute__ ((packed,aligned(256)));
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/*
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* SLSB values
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*/
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#define SLSB_OWNER_PROG 1
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#define SLSB_OWNER_CU 2
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#define SLSB_TYPE_INPUT 0
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#define SLSB_TYPE_OUTPUT 1
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#define SLSB_STATE_NOT_INIT 0
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#define SLSB_STATE_EMPTY 1
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#define SLSB_STATE_PRIMED 2
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#define SLSB_STATE_HALTED 0xe
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#define SLSB_STATE_ERROR 0xf
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#define SLSB_P_INPUT_NOT_INIT 0x80
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#define SLSB_P_INPUT_PROCESSING 0x81
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#define SLSB_CU_INPUT_EMPTY 0x41
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#define SLSB_P_INPUT_PRIMED 0x82
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#define SLSB_P_INPUT_HALTED 0x8E
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#define SLSB_P_INPUT_ERROR 0x8F
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#define SLSB_P_OUTPUT_NOT_INIT 0xA0
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#define SLSB_P_OUTPUT_EMPTY 0xA1
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#define SLSB_CU_OUTPUT_PRIMED 0x62
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#define SLSB_P_OUTPUT_HALTED 0xAE
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#define SLSB_P_OUTPUT_ERROR 0xAF
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#define SLSB_ERROR_DURING_LOOKUP 0xFF
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#endif /* __QDIO_H__ */
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