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779e6e1c72
List of major changes: - split qdio driver into several files - seperation of thin interrupt code - improved handling for multiple thin interrupt devices - inbound and outbound processing now always runs in tasklet context - significant less tasklet schedules per interrupt needed - merged qebsm with non-qebsm handling - cleanup qdio interface and added kerneldoc - coding style Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com> Reviewed-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
383 lines
9.2 KiB
C
383 lines
9.2 KiB
C
/*
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* linux/include/asm-s390/qdio.h
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*
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* Copyright 2000,2008 IBM Corp.
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* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
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* Jan Glauber <jang@linux.vnet.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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#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_MAX_QUEUES_PER_IRQ 32
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#define QDIO_MAX_BUFFERS_PER_Q 128
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#define QDIO_MAX_BUFFERS_MASK (QDIO_MAX_BUFFERS_PER_Q - 1)
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#define QDIO_MAX_ELEMENTS_PER_BUFFER 16
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#define QDIO_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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/**
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* struct qdesfmt0 - queue descriptor, format 0
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* @sliba: storage list information block address
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* @sla: storage list address
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* @slsba: storage list state block address
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* @akey: access key for DLIB
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* @bkey: access key for SL
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* @ckey: access key for SBALs
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* @dkey: access key for SLSB
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*/
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struct qdesfmt0 {
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u64 sliba;
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u64 sla;
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u64 slsba;
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u32 : 32;
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u32 akey : 4;
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u32 bkey : 4;
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u32 ckey : 4;
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u32 dkey : 4;
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u32 : 16;
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} __attribute__ ((packed));
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/**
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* struct qdr - queue description record (QDR)
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* @qfmt: queue format
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* @pfmt: implementation dependent parameter format
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* @ac: adapter characteristics
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* @iqdcnt: input queue descriptor count
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* @oqdcnt: output queue descriptor count
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* @iqdsz: inpout queue descriptor size
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* @oqdsz: output queue descriptor size
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* @qiba: queue information block address
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* @qkey: queue information block key
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* @qdf0: queue descriptions
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*/
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struct qdr {
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u32 qfmt : 8;
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u32 pfmt : 8;
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u32 : 8;
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u32 ac : 8;
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u32 : 8;
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u32 iqdcnt : 8;
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u32 : 8;
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u32 oqdcnt : 8;
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u32 : 8;
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u32 iqdsz : 8;
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u32 : 8;
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u32 oqdsz : 8;
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/* private: */
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u32 res[9];
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/* public: */
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u64 qiba;
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u32 : 32;
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u32 qkey : 4;
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u32 : 28;
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struct qdesfmt0 qdf0[126];
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} __attribute__ ((packed, aligned(4096)));
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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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/**
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* struct qib - queue information block (QIB)
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* @qfmt: queue format
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* @pfmt: implementation dependent parameter format
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* @rflags: QEBSM
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* @ac: adapter characteristics
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* @isliba: absolute address of first input SLIB
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* @osliba: absolute address of first output SLIB
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* @ebcnam: adapter identifier in EBCDIC
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* @parm: implementation dependent parameters
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*/
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struct qib {
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u32 qfmt : 8;
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u32 pfmt : 8;
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u32 rflags : 8;
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u32 ac : 8;
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u32 : 32;
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u64 isliba;
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u64 osliba;
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u32 : 32;
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u32 : 32;
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u8 ebcnam[8];
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/* private: */
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u8 res[88];
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/* public: */
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u8 parm[QDIO_MAX_BUFFERS_PER_Q];
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} __attribute__ ((packed, aligned(256)));
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/**
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* struct slibe - storage list information block element (SLIBE)
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* @parms: implementation dependent parameters
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*/
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struct slibe {
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u64 parms;
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};
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/**
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* struct slib - storage list information block (SLIB)
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* @nsliba: next SLIB address (if any)
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* @sla: SL address
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* @slsba: SLSB address
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* @slibe: SLIB elements
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*/
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struct slib {
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u64 nsliba;
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u64 sla;
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u64 slsba;
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/* private: */
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u8 res[1000];
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/* public: */
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struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
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} __attribute__ ((packed, aligned(2048)));
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/**
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* struct sbal_flags - storage block address list flags
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* @last: last entry
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* @cont: contiguous storage
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* @frag: fragmentation
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*/
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struct sbal_flags {
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u8 : 1;
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u8 last : 1;
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u8 cont : 1;
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u8 : 1;
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u8 frag : 2;
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u8 : 2;
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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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#define SBAL_FLAGS0_PCI 0x40
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/**
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* struct sbal_sbalf_0 - sbal flags for sbale 0
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* @pci: PCI indicator
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* @cont: data continuation
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* @sbtype: storage-block type (FCP)
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*/
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struct sbal_sbalf_0 {
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u8 : 1;
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u8 pci : 1;
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u8 cont : 1;
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u8 sbtype : 2;
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u8 : 3;
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} __attribute__ ((packed));
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/**
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* struct sbal_sbalf_1 - sbal flags for sbale 1
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* @key: storage key
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*/
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struct sbal_sbalf_1 {
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u8 : 4;
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u8 key : 4;
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} __attribute__ ((packed));
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/**
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* struct sbal_sbalf_14 - sbal flags for sbale 14
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* @erridx: error index
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*/
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struct sbal_sbalf_14 {
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u8 : 4;
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u8 erridx : 4;
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} __attribute__ ((packed));
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/**
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* struct sbal_sbalf_15 - sbal flags for sbale 15
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* @reason: reason for error state
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*/
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struct sbal_sbalf_15 {
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u8 reason;
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} __attribute__ ((packed));
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/**
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* union sbal_sbalf - storage block address list flags
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* @i0: sbalf0
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* @i1: sbalf1
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* @i14: sbalf14
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* @i15: sblaf15
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* @value: raw value
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*/
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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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u8 value;
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};
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/**
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* struct qdio_buffer_element - SBAL entry
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* @flags: flags
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* @length: length
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* @addr: address
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*/
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struct qdio_buffer_element {
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u32 flags;
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u32 length;
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#ifdef CONFIG_32BIT
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/* private: */
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void *reserved;
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/* public: */
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#endif
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void *addr;
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} __attribute__ ((packed, aligned(16)));
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/**
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* struct qdio_buffer - storage block address list (SBAL)
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* @element: SBAL entries
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*/
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struct qdio_buffer {
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struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
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} __attribute__ ((packed, aligned(256)));
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/**
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* struct sl_element - storage list entry
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* @sbal: absolute SBAL address
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*/
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struct sl_element {
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#ifdef CONFIG_32BIT
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/* private: */
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unsigned long reserved;
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/* public: */
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#endif
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unsigned long sbal;
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} __attribute__ ((packed));
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/**
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* struct sl - storage list (SL)
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* @element: SL entries
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*/
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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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* struct slsb - storage list state block (SLSB)
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* @val: state per buffer
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*/
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struct slsb {
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u8 val[QDIO_MAX_BUFFERS_PER_Q];
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} __attribute__ ((packed, aligned(256)));
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struct qdio_ssqd_desc {
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u8 flags;
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u8:8;
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u16 sch;
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u8 qfmt;
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u8 parm;
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u8 qdioac1;
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u8 sch_class;
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u8 pcnt;
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u8 icnt;
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u8:8;
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u8 ocnt;
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u8:8;
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u8 mbccnt;
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u16 qdioac2;
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u64 sch_token;
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u64:64;
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} __attribute__ ((packed));
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/* params are: ccw_device, qdio_error, queue_number,
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first element processed, number of elements processed, int_parm */
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typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
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int, int, unsigned long);
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/* qdio errors reported to the upper-layer program */
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#define QDIO_ERROR_SIGA_ACCESS_EXCEPTION 0x10
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#define QDIO_ERROR_SIGA_BUSY 0x20
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#define QDIO_ERROR_ACTIVATE_CHECK_CONDITION 0x40
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#define QDIO_ERROR_SLSB_STATE 0x80
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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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/**
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* struct qdio_initialize - qdio initalization data
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* @cdev: associated ccw device
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* @q_format: queue format
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* @adapter_name: name for the adapter
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* @qib_param_field_format: format for qib_parm_field
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* @qib_param_field: pointer to 128 bytes or NULL, if no param field
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* @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
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* @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
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* @no_input_qs: number of input queues
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* @no_output_qs: number of output queues
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* @input_handler: handler to be called for input queues
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* @output_handler: handler to be called for output queues
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* @int_parm: interruption parameter
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* @flags: initialization flags
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* @input_sbal_addr_array: address of no_input_qs * 128 pointers
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* @output_sbal_addr_array: address of no_output_qs * 128 pointers
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*/
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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;
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unsigned char *qib_param_field;
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unsigned long *input_slib_elements;
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unsigned long *output_slib_elements;
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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;
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void **output_sbal_addr_array;
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};
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#define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */
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#define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */
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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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#define QDIO_FLAG_SYNC_INPUT 0x01
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#define QDIO_FLAG_SYNC_OUTPUT 0x02
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#define QDIO_FLAG_PCI_OUT 0x10
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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 *);
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extern int do_QDIO(struct ccw_device*, unsigned int flags,
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int q_nr, int qidx, int count);
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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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extern struct qdio_ssqd_desc *qdio_get_ssqd_desc(struct ccw_device *cdev);
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#endif /* __QDIO_H__ */
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