[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / cio / qdio.h

/*
 * linux/drivers/s390/cio/qdio.h
 *
 * Copyright 2000,2008 IBM Corp.
 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
 *	      Jan Glauber <jang@linux.vnet.ibm.com>
 */
#ifndef _CIO_QDIO_H
#define _CIO_QDIO_H

#include <asm/page.h>
#include <asm/schid.h>
#include "chsc.h"

#define QDIO_BUSY_BIT_PATIENCE		100	/* 100 microseconds */
#define QDIO_BUSY_BIT_GIVE_UP		2000000	/* 2 seconds = eternity */
#define QDIO_INPUT_THRESHOLD		500	/* 500 microseconds */

enum qdio_irq_states {
	QDIO_IRQ_STATE_INACTIVE,
	QDIO_IRQ_STATE_ESTABLISHED,
	QDIO_IRQ_STATE_ACTIVE,
	QDIO_IRQ_STATE_STOPPED,
	QDIO_IRQ_STATE_CLEANUP,
	QDIO_IRQ_STATE_ERR,
	NR_QDIO_IRQ_STATES,
};

/* used as intparm in do_IO */
#define QDIO_DOING_ESTABLISH	1
#define QDIO_DOING_ACTIVATE	2
#define QDIO_DOING_CLEANUP	3

#define SLSB_STATE_NOT_INIT	0x0
#define SLSB_STATE_EMPTY	0x1
#define SLSB_STATE_PRIMED	0x2
#define SLSB_STATE_HALTED	0xe
#define SLSB_STATE_ERROR	0xf
#define SLSB_TYPE_INPUT		0x0
#define SLSB_TYPE_OUTPUT	0x20
#define SLSB_OWNER_PROG		0x80
#define SLSB_OWNER_CU		0x40

#define SLSB_P_INPUT_NOT_INIT	\
	(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_NOT_INIT)  /* 0x80 */
#define SLSB_P_INPUT_ACK	\
	(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY)	   /* 0x81 */
#define SLSB_CU_INPUT_EMPTY	\
	(SLSB_OWNER_CU | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY)	   /* 0x41 */
#define SLSB_P_INPUT_PRIMED	\
	(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_PRIMED)	   /* 0x82 */
#define SLSB_P_INPUT_HALTED	\
	(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_HALTED)	   /* 0x8e */
#define SLSB_P_INPUT_ERROR	\
	(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_ERROR)	   /* 0x8f */
#define SLSB_P_OUTPUT_NOT_INIT	\
	(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_NOT_INIT) /* 0xa0 */
#define SLSB_P_OUTPUT_EMPTY	\
	(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_EMPTY)	   /* 0xa1 */
#define SLSB_CU_OUTPUT_PRIMED	\
	(SLSB_OWNER_CU | SLSB_TYPE_OUTPUT | SLSB_STATE_PRIMED)	   /* 0x62 */
#define SLSB_P_OUTPUT_HALTED	\
	(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_HALTED)   /* 0xae */
#define SLSB_P_OUTPUT_ERROR	\
	(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_ERROR)	   /* 0xaf */

#define SLSB_ERROR_DURING_LOOKUP  0xff

/* additional CIWs returned by extended Sense-ID */
#define CIW_TYPE_EQUEUE			0x3 /* establish QDIO queues */
#define CIW_TYPE_AQUEUE			0x4 /* activate QDIO queues */

/* flags for st qdio sch data */
#define CHSC_FLAG_QDIO_CAPABILITY	0x80
#define CHSC_FLAG_VALIDITY		0x40

/* qdio adapter-characteristics-1 flag */
#define AC1_SIGA_INPUT_NEEDED		0x40	/* process input queues */
#define AC1_SIGA_OUTPUT_NEEDED		0x20	/* process output queues */
#define AC1_SIGA_SYNC_NEEDED		0x10	/* ask hypervisor to sync */
#define AC1_AUTOMATIC_SYNC_ON_THININT	0x08	/* set by hypervisor */
#define AC1_AUTOMATIC_SYNC_ON_OUT_PCI	0x04	/* set by hypervisor */
#define AC1_SC_QEBSM_AVAILABLE		0x02	/* available for subchannel */
#define AC1_SC_QEBSM_ENABLED		0x01	/* enabled for subchannel */

#ifdef CONFIG_64BIT
static inline int do_sqbs(u64 token, unsigned char state, int queue,
			  int *start, int *count)
{
	register unsigned long _ccq asm ("0") = *count;
	register unsigned long _token asm ("1") = token;
	unsigned long _queuestart = ((unsigned long)queue << 32) | *start;

	asm volatile(
		"	.insn	rsy,0xeb000000008A,%1,0,0(%2)"
		: "+d" (_ccq), "+d" (_queuestart)
		: "d" ((unsigned long)state), "d" (_token)
		: "memory", "cc");
	*count = _ccq & 0xff;
	*start = _queuestart & 0xff;

	return (_ccq >> 32) & 0xff;
}

static inline int do_eqbs(u64 token, unsigned char *state, int queue,
			  int *start, int *count)
{
	register unsigned long _ccq asm ("0") = *count;
	register unsigned long _token asm ("1") = token;
	unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
	unsigned long _state = 0;

	asm volatile(
		"	.insn	rrf,0xB99c0000,%1,%2,0,0"
		: "+d" (_ccq), "+d" (_queuestart), "+d" (_state)
		: "d" (_token)
		: "memory", "cc");
	*count = _ccq & 0xff;
	*start = _queuestart & 0xff;
	*state = _state & 0xff;

	return (_ccq >> 32) & 0xff;
}
#else
static inline int do_sqbs(u64 token, unsigned char state, int queue,
			  int *start, int *count) { return 0; }
static inline int do_eqbs(u64 token, unsigned char *state, int queue,
			  int *start, int *count) { return 0; }
#endif /* CONFIG_64BIT */

struct qdio_irq;

struct siga_flag {
	u8 input:1;
	u8 output:1;
	u8 sync:1;
	u8 no_sync_ti:1;
	u8 no_sync_out_ti:1;
	u8 no_sync_out_pci:1;
	u8:2;
} __attribute__ ((packed));

struct chsc_ssqd_area {
	struct chsc_header request;
	u16:10;
	u8 ssid:2;
	u8 fmt:4;
	u16 first_sch;
	u16:16;
	u16 last_sch;
	u32:32;
	struct chsc_header response;
	u32:32;
	struct qdio_ssqd_desc qdio_ssqd;
} __attribute__ ((packed));

struct scssc_area {
	struct chsc_header request;
	u16 operation_code;
	u16:16;
	u32:32;
	u32:32;
	u64 summary_indicator_addr;
	u64 subchannel_indicator_addr;
	u32 ks:4;
	u32 kc:4;
	u32:21;
	u32 isc:3;
	u32 word_with_d_bit;
	u32:32;
	struct subchannel_id schid;
	u32 reserved[1004];
	struct chsc_header response;
	u32:32;
} __attribute__ ((packed));

struct qdio_input_q {
	/* input buffer acknowledgement flag */
	int polling;

	/* last time of noticing incoming data */
	u64 timestamp;

	/* lock for clearing the acknowledgement */
	spinlock_t lock;
};

struct qdio_output_q {
	/* failed siga-w attempts*/
	atomic_t busy_siga_counter;

	/* start time of busy condition */
	u64 timestamp;

	/* PCIs are enabled for the queue */
	int pci_out_enabled;

	/* timer to check for more outbound work */
	struct timer_list timer;
};

struct qdio_q {
	struct slsb slsb;
	union {
		struct qdio_input_q in;
		struct qdio_output_q out;
	} u;

	/* queue number */
	int nr;

	/* bitmask of queue number */
	int mask;

	/* input or output queue */
	int is_input_q;

	/* list of thinint input queues */
	struct list_head entry;

	/* upper-layer program handler */
	qdio_handler_t (*handler);

	/*
	 * inbound: next buffer the program should check for
	 * outbound: next buffer to check for having been processed
	 * by the card
	 */
	int first_to_check;

	/* first_to_check of the last time */
	int last_move_ftc;

	/* beginning position for calling the program */
	int first_to_kick;

	/* number of buffers in use by the adapter */
	atomic_t nr_buf_used;

	struct qdio_irq *irq_ptr;
	struct tasklet_struct tasklet;

	/* error condition during a data transfer */
	unsigned int qdio_error;

	struct sl *sl;
	struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];

	/*
	 * Warning: Leave this member at the end so it won't be cleared in
	 * qdio_fill_qs. A page is allocated under this pointer and used for
	 * slib and sl. slib is 2048 bytes big and sl points to offset
	 * PAGE_SIZE / 2.
	 */
	struct slib *slib;
} __attribute__ ((aligned(256)));

struct qdio_irq {
	struct qib qib;
	u32 *dsci;		/* address of device state change indicator */
	struct ccw_device *cdev;

	unsigned long int_parm;
	struct subchannel_id schid;
	unsigned long sch_token;	/* QEBSM facility */

	enum qdio_irq_states state;

	struct siga_flag siga_flag;	/* siga sync information from qdioac */

	int nr_input_qs;
	int nr_output_qs;

	struct ccw1 ccw;
	struct ciw equeue;
	struct ciw aqueue;

	struct qdio_ssqd_desc ssqd_desc;

	void (*orig_handler) (struct ccw_device *, unsigned long, struct irb *);

	/*
	 * Warning: Leave these members together at the end so they won't be
	 * cleared in qdio_setup_irq.
	 */
	struct qdr *qdr;
	unsigned long chsc_page;

	struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
	struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];

	struct mutex setup_mutex;
};

/* helper functions */
#define queue_type(q)	q->irq_ptr->qib.qfmt

#define is_thinint_irq(irq) \
	(irq->qib.qfmt == QDIO_IQDIO_QFMT || \
	 css_general_characteristics.aif_osa)

/* the highest iqdio queue is used for multicast */
static inline int multicast_outbound(struct qdio_q *q)
{
	return (q->irq_ptr->nr_output_qs > 1) &&
	       (q->nr == q->irq_ptr->nr_output_qs - 1);
}

static inline unsigned long long get_usecs(void)
{
	return monotonic_clock() >> 12;
}

#define pci_out_supported(q) \
	(q->irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
#define is_qebsm(q)			(q->irq_ptr->sch_token != 0)

#define need_siga_sync_thinint(q)	(!q->irq_ptr->siga_flag.no_sync_ti)
#define need_siga_sync_out_thinint(q)	(!q->irq_ptr->siga_flag.no_sync_out_ti)
#define need_siga_in(q)			(q->irq_ptr->siga_flag.input)
#define need_siga_out(q)		(q->irq_ptr->siga_flag.output)
#define need_siga_sync(q)		(q->irq_ptr->siga_flag.sync)
#define siga_syncs_out_pci(q)		(q->irq_ptr->siga_flag.no_sync_out_pci)

#define for_each_input_queue(irq_ptr, q, i)	\
	for (i = 0, q = irq_ptr->input_qs[0];	\
		i < irq_ptr->nr_input_qs;	\
		q = irq_ptr->input_qs[++i])
#define for_each_output_queue(irq_ptr, q, i)	\
	for (i = 0, q = irq_ptr->output_qs[0];	\
		i < irq_ptr->nr_output_qs;	\
		q = irq_ptr->output_qs[++i])

#define prev_buf(bufnr)	\
	((bufnr + QDIO_MAX_BUFFERS_MASK) & QDIO_MAX_BUFFERS_MASK)
#define next_buf(bufnr)	\
	((bufnr + 1) & QDIO_MAX_BUFFERS_MASK)
#define add_buf(bufnr, inc) \
	((bufnr + inc) & QDIO_MAX_BUFFERS_MASK)

/* prototypes for thin interrupt */
void qdio_sync_after_thinint(struct qdio_q *q);
int get_buf_state(struct qdio_q *q, unsigned int bufnr, unsigned char *state);
void qdio_check_outbound_after_thinint(struct qdio_q *q);
int qdio_inbound_q_moved(struct qdio_q *q);
void qdio_kick_inbound_handler(struct qdio_q *q);
void qdio_stop_polling(struct qdio_q *q);
int qdio_siga_sync_q(struct qdio_q *q);

void qdio_setup_thinint(struct qdio_irq *irq_ptr);
int qdio_establish_thinint(struct qdio_irq *irq_ptr);
void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
void tiqdio_add_input_queues(struct qdio_irq *irq_ptr);
void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr);
void tiqdio_inbound_processing(unsigned long q);
int tiqdio_allocate_memory(void);
void tiqdio_free_memory(void);
int tiqdio_register_thinints(void);
void tiqdio_unregister_thinints(void);

/* prototypes for setup */
void qdio_inbound_processing(unsigned long data);
void qdio_outbound_processing(unsigned long data);
void qdio_outbound_timer(unsigned long data);
void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
		      struct irb *irb);
int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,
		     int nr_output_qs);
void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);
int qdio_setup_irq(struct qdio_initialize *init_data);
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
				struct ccw_device *cdev);
void qdio_release_memory(struct qdio_irq *irq_ptr);
int qdio_setup_init(void);
void qdio_setup_exit(void);

#endif /* _CIO_QDIO_H */
Commit	Line	Data
779e6e1c JG	1	/*
	2	* linux/drivers/s390/cio/qdio.h
	3	*
	4	* Copyright 2000,2008 IBM Corp.
	5	* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
	6	* Jan Glauber <jang@linux.vnet.ibm.com>
	7	*/
1da177e4 LT	8	#ifndef _CIO_QDIO_H
	9	#define _CIO_QDIO_H
	10
0b642ede	11	#include <asm/page.h>
9d92a7e1	12	#include <asm/schid.h>
779e6e1c	13	#include "chsc.h"
a8237fc4	14
779e6e1c JG	15	#define QDIO_BUSY_BIT_PATIENCE 100 /* 100 microseconds */
	16	#define QDIO_BUSY_BIT_GIVE_UP 2000000 /* 2 seconds = eternity */
	17	#define QDIO_INPUT_THRESHOLD 500 /* 500 microseconds */
1da177e4 LT	18
	19	enum qdio_irq_states {
	20	QDIO_IRQ_STATE_INACTIVE,
	21	QDIO_IRQ_STATE_ESTABLISHED,
	22	QDIO_IRQ_STATE_ACTIVE,
	23	QDIO_IRQ_STATE_STOPPED,
	24	QDIO_IRQ_STATE_CLEANUP,
	25	QDIO_IRQ_STATE_ERR,
	26	NR_QDIO_IRQ_STATES,
	27	};
	28
779e6e1c JG	29	/* used as intparm in do_IO */
	30	#define QDIO_DOING_ESTABLISH 1
	31	#define QDIO_DOING_ACTIVATE 2
	32	#define QDIO_DOING_CLEANUP 3
	33
	34	#define SLSB_STATE_NOT_INIT 0x0
	35	#define SLSB_STATE_EMPTY 0x1
	36	#define SLSB_STATE_PRIMED 0x2
	37	#define SLSB_STATE_HALTED 0xe
	38	#define SLSB_STATE_ERROR 0xf
	39	#define SLSB_TYPE_INPUT 0x0
	40	#define SLSB_TYPE_OUTPUT 0x20
	41	#define SLSB_OWNER_PROG 0x80
	42	#define SLSB_OWNER_CU 0x40
	43
	44	#define SLSB_P_INPUT_NOT_INIT \
	45	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_NOT_INIT) /* 0x80 */
	46	#define SLSB_P_INPUT_ACK \
	47	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_EMPTY) /* 0x81 */
	48	#define SLSB_CU_INPUT_EMPTY \
	49	(SLSB_OWNER_CU \| SLSB_TYPE_INPUT \| SLSB_STATE_EMPTY) /* 0x41 */
	50	#define SLSB_P_INPUT_PRIMED \
	51	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_PRIMED) /* 0x82 */
	52	#define SLSB_P_INPUT_HALTED \
	53	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_HALTED) /* 0x8e */
	54	#define SLSB_P_INPUT_ERROR \
	55	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_ERROR) /* 0x8f */
	56	#define SLSB_P_OUTPUT_NOT_INIT \
	57	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_NOT_INIT) /* 0xa0 */
	58	#define SLSB_P_OUTPUT_EMPTY \
	59	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_EMPTY) /* 0xa1 */
	60	#define SLSB_CU_OUTPUT_PRIMED \
	61	(SLSB_OWNER_CU \| SLSB_TYPE_OUTPUT \| SLSB_STATE_PRIMED) /* 0x62 */
	62	#define SLSB_P_OUTPUT_HALTED \
	63	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_HALTED) /* 0xae */
	64	#define SLSB_P_OUTPUT_ERROR \
	65	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_ERROR) /* 0xaf */
	66
	67	#define SLSB_ERROR_DURING_LOOKUP 0xff
	68
	69	/* additional CIWs returned by extended Sense-ID */
	70	#define CIW_TYPE_EQUEUE 0x3 /* establish QDIO queues */
	71	#define CIW_TYPE_AQUEUE 0x4 /* activate QDIO queues */
1da177e4	72
779e6e1c JG	73	/* flags for st qdio sch data */
	74	#define CHSC_FLAG_QDIO_CAPABILITY 0x80
	75	#define CHSC_FLAG_VALIDITY 0x40
	76
	77	/* qdio adapter-characteristics-1 flag */
	78	#define AC1_SIGA_INPUT_NEEDED 0x40 /* process input queues */
	79	#define AC1_SIGA_OUTPUT_NEEDED 0x20 /* process output queues */
	80	#define AC1_SIGA_SYNC_NEEDED 0x10 /* ask hypervisor to sync */
	81	#define AC1_AUTOMATIC_SYNC_ON_THININT 0x08 /* set by hypervisor */
	82	#define AC1_AUTOMATIC_SYNC_ON_OUT_PCI 0x04 /* set by hypervisor */
	83	#define AC1_SC_QEBSM_AVAILABLE 0x02 /* available for subchannel */
	84	#define AC1_SC_QEBSM_ENABLED 0x01 /* enabled for subchannel */
1da177e4	85
779e6e1c JG	86	#ifdef CONFIG_64BIT
	87	static inline int do_sqbs(u64 token, unsigned char state, int queue,
	88	int start, int count)
	89	{
	90	register unsigned long _ccq asm ("0") = *count;
	91	register unsigned long _token asm ("1") = token;
	92	unsigned long _queuestart = ((unsigned long)queue << 32) \| *start;
1da177e4	93
779e6e1c JG	94	asm volatile(
	95	" .insn rsy,0xeb000000008A,%1,0,0(%2)"
	96	: "+d" (_ccq), "+d" (_queuestart)
	97	: "d" ((unsigned long)state), "d" (_token)
	98	: "memory", "cc");
	99	*count = _ccq & 0xff;
	100	*start = _queuestart & 0xff;
8129ee16	101
779e6e1c	102	return (_ccq >> 32) & 0xff;
8129ee16 FP	103	}
8129ee16 FP	104
779e6e1c JG	105	static inline int do_eqbs(u64 token, unsigned char *state, int queue,
779e6e1c JG	106	int start, int count)
8129ee16	107	{
8129ee16	108	register unsigned long _ccq asm ("0") = *count;
779e6e1c	109	register unsigned long _token asm ("1") = token;
8129ee16 FP	110	unsigned long _queuestart = ((unsigned long)queue << 32) \| *start;
	111	unsigned long _state = 0;
	112
94c12cc7 MS	113	asm volatile(
	114	" .insn rrf,0xB99c0000,%1,%2,0,0"
	115	: "+d" (_ccq), "+d" (_queuestart), "+d" (_state)
779e6e1c JG	116	: "d" (_token)
779e6e1c JG	117	: "memory", "cc");
8129ee16 FP	118	*count = _ccq & 0xff;
	119	*start = _queuestart & 0xff;
	120	*state = _state & 0xff;
	121
	122	return (_ccq >> 32) & 0xff;
1da177e4	123	}
779e6e1c JG	124	#else
	125	static inline int do_sqbs(u64 token, unsigned char state, int queue,
	126	int start, int count) { return 0; }
	127	static inline int do_eqbs(u64 token, unsigned char *state, int queue,
	128	int start, int count) { return 0; }
	129	#endif /* CONFIG_64BIT */
1da177e4	130
779e6e1c	131	struct qdio_irq;
1da177e4	132
779e6e1c JG	133	struct siga_flag {
	134	u8 input:1;
	135	u8 output:1;
	136	u8 sync:1;
	137	u8 no_sync_ti:1;
	138	u8 no_sync_out_ti:1;
	139	u8 no_sync_out_pci:1;
	140	u8:2;
	141	} __attribute__ ((packed));
1da177e4	142
779e6e1c	143	struct chsc_ssqd_area {
e1776856	144	struct chsc_header request;
779e6e1c JG	145	u16:10;
	146	u8 ssid:2;
	147	u8 fmt:4;
e1776856	148	u16 first_sch;
779e6e1c	149	u16:16;
e1776856	150	u16 last_sch;
779e6e1c	151	u32:32;
e1776856	152	struct chsc_header response;
779e6e1c JG	153	u32:32;
	154	struct qdio_ssqd_desc qdio_ssqd;
	155	} __attribute__ ((packed));
e1776856	156
779e6e1c JG	157	struct scssc_area {
	158	struct chsc_header request;
	159	u16 operation_code;
	160	u16:16;
	161	u32:32;
	162	u32:32;
	163	u64 summary_indicator_addr;
	164	u64 subchannel_indicator_addr;
	165	u32 ks:4;
	166	u32 kc:4;
	167	u32:21;
	168	u32 isc:3;
	169	u32 word_with_d_bit;
	170	u32:32;
	171	struct subchannel_id schid;
	172	u32 reserved[1004];
	173	struct chsc_header response;
	174	u32:32;
	175	} __attribute__ ((packed));
	176
	177	struct qdio_input_q {
	178	/* input buffer acknowledgement flag */
	179	int polling;
	180
	181	/* last time of noticing incoming data */
	182	u64 timestamp;
	183
	184	/* lock for clearing the acknowledgement */
	185	spinlock_t lock;
1da177e4	186	};
1da177e4	187
779e6e1c JG	188	struct qdio_output_q {
	189	/* failed siga-w attempts*/
	190	atomic_t busy_siga_counter;
1da177e4	191
779e6e1c JG	192	/* start time of busy condition */
779e6e1c JG	193	u64 timestamp;
1da177e4	194
779e6e1c JG	195	/* PCIs are enabled for the queue */
779e6e1c JG	196	int pci_out_enabled;
1da177e4	197
779e6e1c JG	198	/* timer to check for more outbound work */
	199	struct timer_list timer;
	200	};
1da177e4	201
1da177e4	202	struct qdio_q {
779e6e1c JG	203	struct slsb slsb;
	204	union {
	205	struct qdio_input_q in;
	206	struct qdio_output_q out;
	207	} u;
1da177e4	208
779e6e1c JG	209	/* queue number */
779e6e1c JG	210	int nr;
1da177e4	211
779e6e1c JG	212	/* bitmask of queue number */
779e6e1c JG	213	int mask;
1da177e4	214
779e6e1c	215	/* input or output queue */
1da177e4	216	int is_input_q;
1da177e4	217
779e6e1c JG	218	/* list of thinint input queues */
779e6e1c JG	219	struct list_head entry;
1da177e4	220
779e6e1c	221	/* upper-layer program handler */
1da177e4 LT	222	qdio_handler_t (*handler);
1da177e4 LT	223
779e6e1c JG	224	/*
	225	* inbound: next buffer the program should check for
	226	* outbound: next buffer to check for having been processed
	227	* by the card
	228	*/
	229	int first_to_check;
1da177e4	230
779e6e1c JG	231	/* first_to_check of the last time */
779e6e1c JG	232	int last_move_ftc;
1da177e4	233
779e6e1c JG	234	/* beginning position for calling the program */
779e6e1c JG	235	int first_to_kick;
1da177e4	236
779e6e1c JG	237	/* number of buffers in use by the adapter */
779e6e1c JG	238	atomic_t nr_buf_used;
1da177e4	239
779e6e1c	240	struct qdio_irq *irq_ptr;
1da177e4	241	struct tasklet_struct tasklet;
1da177e4	242
779e6e1c	243	/* error condition during a data transfer */
1da177e4	244	unsigned int qdio_error;
1da177e4 LT	245
1da177e4 LT	246	struct sl *sl;
779e6e1c JG	247	struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];
	248
	249	/*
	250	* Warning: Leave this member at the end so it won't be cleared in
	251	* qdio_fill_qs. A page is allocated under this pointer and used for
	252	* slib and sl. slib is 2048 bytes big and sl points to offset
	253	* PAGE_SIZE / 2.
	254	*/
	255	struct slib *slib;
1da177e4 LT	256	} __attribute__ ((aligned(256)));
	257
	258	struct qdio_irq {
779e6e1c JG	259	struct qib qib;
	260	u32 dsci; / address of device state change indicator */
	261	struct ccw_device *cdev;
1da177e4 LT	262
1da177e4 LT	263	unsigned long int_parm;
a8237fc4	264	struct subchannel_id schid;
779e6e1c	265	unsigned long sch_token; /* QEBSM facility */
8129ee16	266
1da177e4 LT	267	enum qdio_irq_states state;
1da177e4 LT	268
779e6e1c	269	struct siga_flag siga_flag; /* siga sync information from qdioac */
1da177e4	270
779e6e1c JG	271	int nr_input_qs;
779e6e1c JG	272	int nr_output_qs;
1da177e4 LT	273
1da177e4 LT	274	struct ccw1 ccw;
1da177e4 LT	275	struct ciw equeue;
	276	struct ciw aqueue;
	277
779e6e1c JG	278	struct qdio_ssqd_desc ssqd_desc;
	279
	280	void (orig_handler) (struct ccw_device , unsigned long, struct irb *);
1da177e4	281
779e6e1c JG	282	/*
	283	* Warning: Leave these members together at the end so they won't be
	284	* cleared in qdio_setup_irq.
	285	*/
1da177e4	286	struct qdr *qdr;
779e6e1c JG	287	unsigned long chsc_page;
779e6e1c JG	288
1da177e4 LT	289	struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
1da177e4 LT	290	struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];
779e6e1c JG	291
779e6e1c JG	292	struct mutex setup_mutex;
1da177e4	293	};
779e6e1c JG	294
	295	/* helper functions */
	296	#define queue_type(q) q->irq_ptr->qib.qfmt
	297
	298	#define is_thinint_irq(irq) \
	299	(irq->qib.qfmt == QDIO_IQDIO_QFMT \|\| \
	300	css_general_characteristics.aif_osa)
	301
	302	/* the highest iqdio queue is used for multicast */
	303	static inline int multicast_outbound(struct qdio_q *q)
	304	{
	305	return (q->irq_ptr->nr_output_qs > 1) &&
	306	(q->nr == q->irq_ptr->nr_output_qs - 1);
	307	}
	308
	309	static inline unsigned long long get_usecs(void)
	310	{
	311	return monotonic_clock() >> 12;
	312	}
	313
	314	#define pci_out_supported(q) \
	315	(q->irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
	316	#define is_qebsm(q) (q->irq_ptr->sch_token != 0)
	317
	318	#define need_siga_sync_thinint(q) (!q->irq_ptr->siga_flag.no_sync_ti)
	319	#define need_siga_sync_out_thinint(q) (!q->irq_ptr->siga_flag.no_sync_out_ti)
	320	#define need_siga_in(q) (q->irq_ptr->siga_flag.input)
	321	#define need_siga_out(q) (q->irq_ptr->siga_flag.output)
	322	#define need_siga_sync(q) (q->irq_ptr->siga_flag.sync)
	323	#define siga_syncs_out_pci(q) (q->irq_ptr->siga_flag.no_sync_out_pci)
	324
	325	#define for_each_input_queue(irq_ptr, q, i) \
	326	for (i = 0, q = irq_ptr->input_qs[0]; \
	327	i < irq_ptr->nr_input_qs; \
	328	q = irq_ptr->input_qs[++i])
	329	#define for_each_output_queue(irq_ptr, q, i) \
	330	for (i = 0, q = irq_ptr->output_qs[0]; \
	331	i < irq_ptr->nr_output_qs; \
	332	q = irq_ptr->output_qs[++i])
	333
	334	#define prev_buf(bufnr) \
	335	((bufnr + QDIO_MAX_BUFFERS_MASK) & QDIO_MAX_BUFFERS_MASK)
	336	#define next_buf(bufnr) \
	337	((bufnr + 1) & QDIO_MAX_BUFFERS_MASK)
	338	#define add_buf(bufnr, inc) \
	339	((bufnr + inc) & QDIO_MAX_BUFFERS_MASK)
	340
	341	/* prototypes for thin interrupt */
	342	void qdio_sync_after_thinint(struct qdio_q *q);
	343	int get_buf_state(struct qdio_q q, unsigned int bufnr, unsigned char state);
	344	void qdio_check_outbound_after_thinint(struct qdio_q *q);
	345	int qdio_inbound_q_moved(struct qdio_q *q);
	346	void qdio_kick_inbound_handler(struct qdio_q *q);
	347	void qdio_stop_polling(struct qdio_q *q);
	348	int qdio_siga_sync_q(struct qdio_q *q);
	349
	350	void qdio_setup_thinint(struct qdio_irq *irq_ptr);
	351	int qdio_establish_thinint(struct qdio_irq *irq_ptr);
	352	void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
	353	void tiqdio_add_input_queues(struct qdio_irq *irq_ptr);
	354	void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr);
	355	void tiqdio_inbound_processing(unsigned long q);
	356	int tiqdio_allocate_memory(void);
	357	void tiqdio_free_memory(void);
358	int tiqdio_register_thinints(void);
359	void tiqdio_unregister_thinints(void);
360
361	/* prototypes for setup */
362	void qdio_inbound_processing(unsigned long data);
363	void qdio_outbound_processing(unsigned long data);
364	void qdio_outbound_timer(unsigned long data);
365	void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
366	struct irb *irb);
367	int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,
368	int nr_output_qs);
369	void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);
370	int qdio_setup_irq(struct qdio_initialize *init_data);
371	void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
372	struct ccw_device *cdev);
373	void qdio_release_memory(struct qdio_irq *irq_ptr);
374	int qdio_setup_init(void);
375	void qdio_setup_exit(void);
376
377	#endif /* _CIO_QDIO_H */