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linux/arch/s390/include/asm/qdio.h
Jan Glauber 3ec90878ba [S390] qdio: Split SBAL entry flags 
The qdio SBAL entry flag is made-up of four different values that are
independent of one another. Some of the bits are reserved by the
hardware and should not be changed by qdio. Currently all four values
are overwritten since the SBAL entry flag is defined as an u32.

Split the SBAL entry flag into four u8's as defined by the hardware
and don't touch the reserved bits.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-06-06 14:14:56 +02:00

329 lines
8.3 KiB
C
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/*
* linux/include/asm-s390/qdio.h
*
* Copyright 2000,2008 IBM Corp.
* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
* Jan Glauber <jang@linux.vnet.ibm.com>
*
*/
#ifndef __QDIO_H__
#define __QDIO_H__
#include <linux/interrupt.h>
#include <asm/cio.h>
#include <asm/ccwdev.h>
/* only use 4 queues to save some cachelines */
#define QDIO_MAX_QUEUES_PER_IRQ 4
#define QDIO_MAX_BUFFERS_PER_Q 128
#define QDIO_MAX_BUFFERS_MASK (QDIO_MAX_BUFFERS_PER_Q - 1)
#define QDIO_MAX_ELEMENTS_PER_BUFFER 16
#define QDIO_SBAL_SIZE 256
#define QDIO_QETH_QFMT 0
#define QDIO_ZFCP_QFMT 1
#define QDIO_IQDIO_QFMT 2
/**
* struct qdesfmt0 - queue descriptor, format 0
* @sliba: storage list information block address
* @sla: storage list address
* @slsba: storage list state block address
* @akey: access key for DLIB
* @bkey: access key for SL
* @ckey: access key for SBALs
* @dkey: access key for SLSB
*/
struct qdesfmt0 {
u64 sliba;
u64 sla;
u64 slsba;
u32 : 32;
u32 akey : 4;
u32 bkey : 4;
u32 ckey : 4;
u32 dkey : 4;
u32 : 16;
} __attribute__ ((packed));
/**
* struct qdr - queue description record (QDR)
* @qfmt: queue format
* @pfmt: implementation dependent parameter format
* @ac: adapter characteristics
* @iqdcnt: input queue descriptor count
* @oqdcnt: output queue descriptor count
* @iqdsz: inpout queue descriptor size
* @oqdsz: output queue descriptor size
* @qiba: queue information block address
* @qkey: queue information block key
* @qdf0: queue descriptions
*/
struct qdr {
u32 qfmt : 8;
u32 pfmt : 8;
u32 : 8;
u32 ac : 8;
u32 : 8;
u32 iqdcnt : 8;
u32 : 8;
u32 oqdcnt : 8;
u32 : 8;
u32 iqdsz : 8;
u32 : 8;
u32 oqdsz : 8;
/* private: */
u32 res[9];
/* public: */
u64 qiba;
u32 : 32;
u32 qkey : 4;
u32 : 28;
struct qdesfmt0 qdf0[126];
} __attribute__ ((packed, aligned(4096)));
#define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40
#define QIB_RFLAGS_ENABLE_QEBSM 0x80
#define QIB_RFLAGS_ENABLE_DATA_DIV 0x02
/**
* struct qib - queue information block (QIB)
* @qfmt: queue format
* @pfmt: implementation dependent parameter format
* @rflags: QEBSM
* @ac: adapter characteristics
* @isliba: absolute address of first input SLIB
* @osliba: absolute address of first output SLIB
* @ebcnam: adapter identifier in EBCDIC
* @parm: implementation dependent parameters
*/
struct qib {
u32 qfmt : 8;
u32 pfmt : 8;
u32 rflags : 8;
u32 ac : 8;
u32 : 32;
u64 isliba;
u64 osliba;
u32 : 32;
u32 : 32;
u8 ebcnam[8];
/* private: */
u8 res[88];
/* public: */
u8 parm[QDIO_MAX_BUFFERS_PER_Q];
} __attribute__ ((packed, aligned(256)));
/**
* struct slibe - storage list information block element (SLIBE)
* @parms: implementation dependent parameters
*/
struct slibe {
u64 parms;
};
/**
* struct slib - storage list information block (SLIB)
* @nsliba: next SLIB address (if any)
* @sla: SL address
* @slsba: SLSB address
* @slibe: SLIB elements
*/
struct slib {
u64 nsliba;
u64 sla;
u64 slsba;
/* private: */
u8 res[1000];
/* public: */
struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
} __attribute__ ((packed, aligned(2048)));
#define SBAL_EFLAGS_LAST_ENTRY 0x40
#define SBAL_EFLAGS_CONTIGUOUS 0x20
#define SBAL_EFLAGS_FIRST_FRAG 0x04
#define SBAL_EFLAGS_MIDDLE_FRAG 0x08
#define SBAL_EFLAGS_LAST_FRAG 0x0c
#define SBAL_EFLAGS_MASK 0x6f
#define SBAL_SFLAGS0_PCI_REQ 0x40
#define SBAL_SFLAGS0_DATA_CONTINUATION 0x20
/* Awesome OpenFCP extensions */
#define SBAL_SFLAGS0_TYPE_STATUS 0x00
#define SBAL_SFLAGS0_TYPE_WRITE 0x08
#define SBAL_SFLAGS0_TYPE_READ 0x10
#define SBAL_SFLAGS0_TYPE_WRITE_READ 0x18
#define SBAL_SFLAGS0_MORE_SBALS 0x04
#define SBAL_SFLAGS0_COMMAND 0x02
#define SBAL_SFLAGS0_LAST_SBAL 0x00
#define SBAL_SFLAGS0_ONLY_SBAL SBAL_SFLAGS0_COMMAND
#define SBAL_SFLAGS0_MIDDLE_SBAL SBAL_SFLAGS0_MORE_SBALS
#define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND)
/**
* struct qdio_buffer_element - SBAL entry
* @eflags: SBAL entry flags
* @scount: SBAL count
* @sflags: whole SBAL flags
* @length: length
* @addr: address
*/
struct qdio_buffer_element {
u8 eflags;
/* private: */
u8 res1;
/* public: */
u8 scount;
u8 sflags;
u32 length;
#ifdef CONFIG_32BIT
/* private: */
void *res2;
/* public: */
#endif
void *addr;
} __attribute__ ((packed, aligned(16)));
/**
* struct qdio_buffer - storage block address list (SBAL)
* @element: SBAL entries
*/
struct qdio_buffer {
struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
} __attribute__ ((packed, aligned(256)));
/**
* struct sl_element - storage list entry
* @sbal: absolute SBAL address
*/
struct sl_element {
#ifdef CONFIG_32BIT
/* private: */
unsigned long reserved;
/* public: */
#endif
unsigned long sbal;
} __attribute__ ((packed));
/**
* struct sl - storage list (SL)
* @element: SL entries
*/
struct sl {
struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
} __attribute__ ((packed, aligned(1024)));
/**
* struct slsb - storage list state block (SLSB)
* @val: state per buffer
*/
struct slsb {
u8 val[QDIO_MAX_BUFFERS_PER_Q];
} __attribute__ ((packed, aligned(256)));
#define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010
#define CHSC_AC2_DATA_DIV_ENABLED 0x0002
struct qdio_ssqd_desc {
u8 flags;
u8:8;
u16 sch;
u8 qfmt;
u8 parm;
u8 qdioac1;
u8 sch_class;
u8 pcnt;
u8 icnt;
u8:8;
u8 ocnt;
u8:8;
u8 mbccnt;
u16 qdioac2;
u64 sch_token;
u8 mro;
u8 mri;
u8:8;
u8 sbalic;
u16:16;
u8:8;
u8 mmwc;
} __attribute__ ((packed));
/* params are: ccw_device, qdio_error, queue_number,
first element processed, number of elements processed, int_parm */
typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
int, int, unsigned long);
/* qdio errors reported to the upper-layer program */
#define QDIO_ERROR_SIGA_TARGET 0x02
#define QDIO_ERROR_SIGA_ACCESS_EXCEPTION 0x10
#define QDIO_ERROR_SIGA_BUSY 0x20
#define QDIO_ERROR_ACTIVATE_CHECK_CONDITION 0x40
#define QDIO_ERROR_SLSB_STATE 0x80
/* for qdio_cleanup */
#define QDIO_FLAG_CLEANUP_USING_CLEAR 0x01
#define QDIO_FLAG_CLEANUP_USING_HALT 0x02
/**
* struct qdio_initialize - qdio initalization data
* @cdev: associated ccw device
* @q_format: queue format
* @adapter_name: name for the adapter
* @qib_param_field_format: format for qib_parm_field
* @qib_param_field: pointer to 128 bytes or NULL, if no param field
* @qib_rflags: rflags to set
* @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
* @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
* @no_input_qs: number of input queues
* @no_output_qs: number of output queues
* @input_handler: handler to be called for input queues
* @output_handler: handler to be called for output queues
* @int_parm: interruption parameter
* @input_sbal_addr_array: address of no_input_qs * 128 pointers
* @output_sbal_addr_array: address of no_output_qs * 128 pointers
*/
struct qdio_initialize {
struct ccw_device *cdev;
unsigned char q_format;
unsigned char adapter_name[8];
unsigned int qib_param_field_format;
unsigned char *qib_param_field;
unsigned char qib_rflags;
unsigned long *input_slib_elements;
unsigned long *output_slib_elements;
unsigned int no_input_qs;
unsigned int no_output_qs;
qdio_handler_t *input_handler;
qdio_handler_t *output_handler;
void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
int scan_threshold;
unsigned long int_parm;
void **input_sbal_addr_array;
void **output_sbal_addr_array;
};
#define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */
#define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */
#define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */
#define QDIO_STATE_STOPPED 0x00000010 /* after queues went down */
#define QDIO_FLAG_SYNC_INPUT 0x01
#define QDIO_FLAG_SYNC_OUTPUT 0x02
#define QDIO_FLAG_PCI_OUT 0x10
extern int qdio_allocate(struct qdio_initialize *);
extern int qdio_establish(struct qdio_initialize *);
extern int qdio_activate(struct ccw_device *);
extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int,
unsigned int);
extern int qdio_start_irq(struct ccw_device *, int);
extern int qdio_stop_irq(struct ccw_device *, int);
extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *);
extern int qdio_shutdown(struct ccw_device *, int);
extern int qdio_free(struct ccw_device *);
extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
#endif /* __QDIO_H__ */
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