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android_kernel_xiaomi_sm8350/arch/s390/include/asm/qdio.h
Jan Glauber 6618241b47 [S390] qdio: Sanitize do_QDIO sanity checks 
Remove unneeded sanity checks from do_QDIO since this is the hot path.
Change the type of bufnr and count to unsigned int so the check for the
maximum value works.

Reported-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-06-22 12:08:21 +02:00

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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>
#define QDIO_MAX_QUEUES_PER_IRQ 32
#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
/**
* 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)));
/**
* struct sbal_flags - storage block address list flags
* @last: last entry
* @cont: contiguous storage
* @frag: fragmentation
*/
struct sbal_flags {
u8 : 1;
u8 last : 1;
u8 cont : 1;
u8 : 1;
u8 frag : 2;
u8 : 2;
} __attribute__ ((packed));
#define SBAL_FLAGS_FIRST_FRAG 0x04000000UL
#define SBAL_FLAGS_MIDDLE_FRAG 0x08000000UL
#define SBAL_FLAGS_LAST_FRAG 0x0c000000UL
#define SBAL_FLAGS_LAST_ENTRY 0x40000000UL
#define SBAL_FLAGS_CONTIGUOUS 0x20000000UL
#define SBAL_FLAGS0_DATA_CONTINUATION 0x20UL
/* Awesome OpenFCP extensions */
#define SBAL_FLAGS0_TYPE_STATUS 0x00UL
#define SBAL_FLAGS0_TYPE_WRITE 0x08UL
#define SBAL_FLAGS0_TYPE_READ 0x10UL
#define SBAL_FLAGS0_TYPE_WRITE_READ 0x18UL
#define SBAL_FLAGS0_MORE_SBALS 0x04UL
#define SBAL_FLAGS0_COMMAND 0x02UL
#define SBAL_FLAGS0_LAST_SBAL 0x00UL
#define SBAL_FLAGS0_ONLY_SBAL SBAL_FLAGS0_COMMAND
#define SBAL_FLAGS0_MIDDLE_SBAL SBAL_FLAGS0_MORE_SBALS
#define SBAL_FLAGS0_FIRST_SBAL SBAL_FLAGS0_MORE_SBALS | SBAL_FLAGS0_COMMAND
#define SBAL_FLAGS0_PCI 0x40
/**
* struct sbal_sbalf_0 - sbal flags for sbale 0
* @pci: PCI indicator
* @cont: data continuation
* @sbtype: storage-block type (FCP)
*/
struct sbal_sbalf_0 {
u8 : 1;
u8 pci : 1;
u8 cont : 1;
u8 sbtype : 2;
u8 : 3;
} __attribute__ ((packed));
/**
* struct sbal_sbalf_1 - sbal flags for sbale 1
* @key: storage key
*/
struct sbal_sbalf_1 {
u8 : 4;
u8 key : 4;
} __attribute__ ((packed));
/**
* struct sbal_sbalf_14 - sbal flags for sbale 14
* @erridx: error index
*/
struct sbal_sbalf_14 {
u8 : 4;
u8 erridx : 4;
} __attribute__ ((packed));
/**
* struct sbal_sbalf_15 - sbal flags for sbale 15
* @reason: reason for error state
*/
struct sbal_sbalf_15 {
u8 reason;
} __attribute__ ((packed));
/**
* union sbal_sbalf - storage block address list flags
* @i0: sbalf0
* @i1: sbalf1
* @i14: sbalf14
* @i15: sblaf15
* @value: raw value
*/
union sbal_sbalf {
struct sbal_sbalf_0 i0;
struct sbal_sbalf_1 i1;
struct sbal_sbalf_14 i14;
struct sbal_sbalf_15 i15;
u8 value;
};
/**
* struct qdio_buffer_element - SBAL entry
* @flags: flags
* @length: length
* @addr: address
*/
struct qdio_buffer_element {
u32 flags;
u32 length;
#ifdef CONFIG_32BIT
/* private: */
void *reserved;
/* 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)));
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_initialize */
#define QDIO_INBOUND_0COPY_SBALS 0x01
#define QDIO_OUTBOUND_0COPY_SBALS 0x02
#define QDIO_USE_OUTBOUND_PCIS 0x04
/* 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
* @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
* @flags: initialization flags
* @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 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;
unsigned long int_parm;
unsigned long flags;
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_initialize(struct qdio_initialize *);
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 *cdev, unsigned int callflags,
int q_nr, unsigned int bufnr, unsigned int count);
extern int qdio_cleanup(struct ccw_device*, 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 *dev, struct qdio_ssqd_desc*);
#endif /* __QDIO_H__ */
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