[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / cio / qdio.h

/*
 * Copyright IBM Corp. 2000, 2009
 * 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 <asm/debug.h>
#include "chsc.h"

#define QDIO_BUSY_BIT_PATIENCE		(100 << 12)	/* 100 microseconds */
#define QDIO_BUSY_BIT_RETRY_DELAY	10		/* 10 milliseconds */
#define QDIO_BUSY_BIT_RETRIES		1000		/* = 10s retry time */
#define QDIO_INPUT_THRESHOLD		(500 << 12)	/* 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_PENDING	0x3
#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_P_OUTPUT_PENDING \
	(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_PENDING)  /* 0xa3 */
#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

/* SIGA flags */
#define QDIO_SIGA_WRITE		0x00
#define QDIO_SIGA_READ		0x01
#define QDIO_SIGA_SYNC		0x02
#define QDIO_SIGA_WRITEQ	0x04
#define QDIO_SIGA_QEBSM_FLAG	0x80

#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, int ack)
{
	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 = (unsigned long)ack << 63;

	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, int ack) { return 0; }
#endif /* CONFIG_64BIT */

struct qdio_irq;

struct siga_flag {
	u8 input:1;
	u8 output:1;
	u8 sync:1;
	u8 sync_after_ai:1;
	u8 sync_out_after_pci:1;
	u8:3;
} __attribute__ ((packed));

struct qdio_dev_perf_stat {
	unsigned int adapter_int;
	unsigned int qdio_int;
	unsigned int pci_request_int;

	unsigned int tasklet_inbound;
	unsigned int tasklet_inbound_resched;
	unsigned int tasklet_inbound_resched2;
	unsigned int tasklet_outbound;

	unsigned int siga_read;
	unsigned int siga_write;
	unsigned int siga_sync;

	unsigned int inbound_call;
	unsigned int inbound_handler;
	unsigned int stop_polling;
	unsigned int inbound_queue_full;
	unsigned int outbound_call;
	unsigned int outbound_handler;
	unsigned int outbound_queue_full;
	unsigned int fast_requeue;
	unsigned int target_full;
	unsigned int eqbs;
	unsigned int eqbs_partial;
	unsigned int sqbs;
	unsigned int sqbs_partial;
	unsigned int int_discarded;
} ____cacheline_aligned;

struct qdio_queue_perf_stat {
	/*
	 * Sorted into order-2 buckets: 1, 2-3, 4-7, ... 64-127, 128.
	 * Since max. 127 SBALs are scanned reuse entry for 128 as queue full
	 * aka 127 SBALs found.
	 */
	unsigned int nr_sbals[8];
	unsigned int nr_sbal_error;
	unsigned int nr_sbal_nop;
	unsigned int nr_sbal_total;
};

enum qdio_queue_irq_states {
	QDIO_QUEUE_IRQS_DISABLED,
};

struct qdio_input_q {
	/* input buffer acknowledgement flag */
	int polling;
	/* first ACK'ed buffer */
	int ack_start;
	/* how much sbals are acknowledged with qebsm */
	int ack_count;
	/* last time of noticing incoming data */
	u64 timestamp;
	/* upper-layer polling flag */
	unsigned long queue_irq_state;
	/* callback to start upper-layer polling */
	void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
};

struct qdio_output_q {
	/* PCIs are enabled for the queue */
	int pci_out_enabled;
	/* cq: use asynchronous output buffers */
	int use_cq;
	/* cq: aobs used for particual SBAL */
	struct qaob **aobs;
	/* cq: sbal state related to asynchronous operation */
	struct qdio_outbuf_state *sbal_state;
	/* timer to check for more outbound work */
	struct timer_list timer;
	/* used SBALs before tasklet schedule */
	int scan_threshold;
};

/*
 * Note on cache alignment: grouped slsb and write mostly data at the beginning
 * sbal[] is read-only and starts on a new cacheline followed by read mostly.
 */
struct qdio_q {
	struct slsb slsb;

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

	/*
	 * inbound: next buffer the program should check for
	 * outbound: next buffer to check if adapter processed it
	 */
	int first_to_check;

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

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

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

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

	/* last scan of the queue */
	u64 timestamp;

	struct tasklet_struct tasklet;
	struct qdio_queue_perf_stat q_stats;

	struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q] ____cacheline_aligned;

	/* 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);

	struct dentry *debugfs_q;
	struct qdio_irq *irq_ptr;
	struct sl *sl;
	/*
	 * 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;
	struct dentry *debugfs_dev;
	struct dentry *debugfs_perf;

	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 *);

	int perf_stat_enabled;

	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];

	debug_info_t *debug_area;
	struct mutex setup_mutex;
	struct qdio_dev_perf_stat perf_stat;
};

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

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

#define qperf(__qdev, __attr)	((__qdev)->perf_stat.(__attr))

#define qperf_inc(__q, __attr)						\
({									\
	struct qdio_irq *qdev = (__q)->irq_ptr;				\
	if (qdev->perf_stat_enabled)					\
		(qdev->perf_stat.__attr)++;				\
})

static inline void account_sbals_error(struct qdio_q *q, int count)
{
	q->q_stats.nr_sbal_error += count;
	q->q_stats.nr_sbal_total += count;
}

/* 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);
}

#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_in(q)			(q->irq_ptr->siga_flag.input)
#define need_siga_out(q)		(q->irq_ptr->siga_flag.output)
#define need_siga_sync(q)		(unlikely(q->irq_ptr->siga_flag.sync))
#define need_siga_sync_after_ai(q)	\
	(unlikely(q->irq_ptr->siga_flag.sync_after_ai))
#define need_siga_sync_out_after_pci(q)	\
	(unlikely(q->irq_ptr->siga_flag.sync_out_after_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)
#define sub_buf(bufnr, dec) \
	((bufnr - dec) & QDIO_MAX_BUFFERS_MASK)

#define queue_irqs_enabled(q)			\
	(test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) == 0)
#define queue_irqs_disabled(q)			\
	(test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0)

extern u64 last_ai_time;

/* prototypes for thin interrupt */
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);
void clear_nonshared_ind(struct qdio_irq *);
int test_nonshared_ind(struct qdio_irq *);

/* 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_get_ssqd(struct qdio_irq *irq_ptr,
			struct subchannel_id *schid,
			struct qdio_ssqd_desc *data);
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_create_sysfs(struct ccw_device *cdev);
void qdio_setup_destroy_sysfs(struct ccw_device *cdev);
int qdio_setup_init(void);
void qdio_setup_exit(void);
int qdio_enable_async_operation(struct qdio_output_q *q);
void qdio_disable_async_operation(struct qdio_output_q *q);
struct qaob *qdio_allocate_aob(void);

int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
			unsigned char *state);
#endif /* _CIO_QDIO_H */
Commit	Line	Data
779e6e1c	1	/*
a53c8fab	2	* Copyright IBM Corp. 2000, 2009
779e6e1c JG	3	* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
	4	* Jan Glauber <jang@linux.vnet.ibm.com>
	5	*/
1da177e4 LT	6	#ifndef _CIO_QDIO_H
	7	#define _CIO_QDIO_H
	8
0b642ede	9	#include <asm/page.h>
9d92a7e1	10	#include <asm/schid.h>
22f99347	11	#include <asm/debug.h>
779e6e1c	12	#include "chsc.h"
a8237fc4	13
3a601bfe	14	#define QDIO_BUSY_BIT_PATIENCE (100 << 12) /* 100 microseconds */
be8d97a5 JG	15	#define QDIO_BUSY_BIT_RETRY_DELAY 10 /* 10 milliseconds */
be8d97a5 JG	16	#define QDIO_BUSY_BIT_RETRIES 1000 /* = 10s retry time */
3a601bfe	17	#define QDIO_INPUT_THRESHOLD (500 << 12) /* 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
104ea556	37	#define SLSB_STATE_PENDING 0x3
779e6e1c JG	38	#define SLSB_STATE_HALTED 0xe
	39	#define SLSB_STATE_ERROR 0xf
	40	#define SLSB_TYPE_INPUT 0x0
	41	#define SLSB_TYPE_OUTPUT 0x20
	42	#define SLSB_OWNER_PROG 0x80
	43	#define SLSB_OWNER_CU 0x40
	44
	45	#define SLSB_P_INPUT_NOT_INIT \
	46	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_NOT_INIT) /* 0x80 */
	47	#define SLSB_P_INPUT_ACK \
	48	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_EMPTY) /* 0x81 */
	49	#define SLSB_CU_INPUT_EMPTY \
	50	(SLSB_OWNER_CU \| SLSB_TYPE_INPUT \| SLSB_STATE_EMPTY) /* 0x41 */
	51	#define SLSB_P_INPUT_PRIMED \
	52	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_PRIMED) /* 0x82 */
	53	#define SLSB_P_INPUT_HALTED \
	54	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_HALTED) /* 0x8e */
	55	#define SLSB_P_INPUT_ERROR \
	56	(SLSB_OWNER_PROG \| SLSB_TYPE_INPUT \| SLSB_STATE_ERROR) /* 0x8f */
	57	#define SLSB_P_OUTPUT_NOT_INIT \
	58	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_NOT_INIT) /* 0xa0 */
	59	#define SLSB_P_OUTPUT_EMPTY \
	60	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_EMPTY) /* 0xa1 */
104ea556	61	#define SLSB_P_OUTPUT_PENDING \
104ea556	62	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_PENDING) /* 0xa3 */
779e6e1c JG	63	#define SLSB_CU_OUTPUT_PRIMED \
	64	(SLSB_OWNER_CU \| SLSB_TYPE_OUTPUT \| SLSB_STATE_PRIMED) /* 0x62 */
	65	#define SLSB_P_OUTPUT_HALTED \
	66	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_HALTED) /* 0xae */
	67	#define SLSB_P_OUTPUT_ERROR \
	68	(SLSB_OWNER_PROG \| SLSB_TYPE_OUTPUT \| SLSB_STATE_ERROR) /* 0xaf */
	69
	70	#define SLSB_ERROR_DURING_LOOKUP 0xff
	71
	72	/* additional CIWs returned by extended Sense-ID */
	73	#define CIW_TYPE_EQUEUE 0x3 /* establish QDIO queues */
	74	#define CIW_TYPE_AQUEUE 0x4 /* activate QDIO queues */
1da177e4	75
779e6e1c JG	76	/* flags for st qdio sch data */
	77	#define CHSC_FLAG_QDIO_CAPABILITY 0x80
	78	#define CHSC_FLAG_VALIDITY 0x40
	79
958c0ba4 JG	80	/* SIGA flags */
	81	#define QDIO_SIGA_WRITE 0x00
	82	#define QDIO_SIGA_READ 0x01
	83	#define QDIO_SIGA_SYNC 0x02
104ea556	84	#define QDIO_SIGA_WRITEQ 0x04
958c0ba4 JG	85	#define QDIO_SIGA_QEBSM_FLAG 0x80
958c0ba4 JG	86
779e6e1c JG	87	#ifdef CONFIG_64BIT
	88	static inline int do_sqbs(u64 token, unsigned char state, int queue,
	89	int start, int count)
	90	{
	91	register unsigned long _ccq asm ("0") = *count;
	92	register unsigned long _token asm ("1") = token;
	93	unsigned long _queuestart = ((unsigned long)queue << 32) \| *start;
1da177e4	94
779e6e1c JG	95	asm volatile(
	96	" .insn rsy,0xeb000000008A,%1,0,0(%2)"
	97	: "+d" (_ccq), "+d" (_queuestart)
	98	: "d" ((unsigned long)state), "d" (_token)
	99	: "memory", "cc");
	100	*count = _ccq & 0xff;
	101	*start = _queuestart & 0xff;
8129ee16	102
779e6e1c	103	return (_ccq >> 32) & 0xff;
8129ee16 FP	104	}
8129ee16 FP	105
779e6e1c	106	static inline int do_eqbs(u64 token, unsigned char *state, int queue,
50f769df	107	int start, int count, int ack)
8129ee16	108	{
8129ee16	109	register unsigned long _ccq asm ("0") = *count;
779e6e1c	110	register unsigned long _token asm ("1") = token;
8129ee16	111	unsigned long _queuestart = ((unsigned long)queue << 32) \| *start;
50f769df	112	unsigned long _state = (unsigned long)ack << 63;
8129ee16	113
94c12cc7 MS	114	asm volatile(
	115	" .insn rrf,0xB99c0000,%1,%2,0,0"
	116	: "+d" (_ccq), "+d" (_queuestart), "+d" (_state)
779e6e1c JG	117	: "d" (_token)
779e6e1c JG	118	: "memory", "cc");
8129ee16 FP	119	*count = _ccq & 0xff;
	120	*start = _queuestart & 0xff;
	121	*state = _state & 0xff;
	122
	123	return (_ccq >> 32) & 0xff;
1da177e4	124	}
779e6e1c JG	125	#else
	126	static inline int do_sqbs(u64 token, unsigned char state, int queue,
	127	int start, int count) { return 0; }
	128	static inline int do_eqbs(u64 token, unsigned char *state, int queue,
50f769df	129	int start, int count, int ack) { return 0; }
779e6e1c	130	#endif /* CONFIG_64BIT */
1da177e4	131
779e6e1c	132	struct qdio_irq;
1da177e4	133
779e6e1c JG	134	struct siga_flag {
	135	u8 input:1;
	136	u8 output:1;
	137	u8 sync:1;
90adac58 JG	138	u8 sync_after_ai:1;
	139	u8 sync_out_after_pci:1;
	140	u8:3;
779e6e1c	141	} __attribute__ ((packed));
1da177e4	142
6486cda6 JG	143	struct qdio_dev_perf_stat {
	144	unsigned int adapter_int;
	145	unsigned int qdio_int;
	146	unsigned int pci_request_int;
	147
	148	unsigned int tasklet_inbound;
	149	unsigned int tasklet_inbound_resched;
	150	unsigned int tasklet_inbound_resched2;
	151	unsigned int tasklet_outbound;
	152
	153	unsigned int siga_read;
	154	unsigned int siga_write;
	155	unsigned int siga_sync;
	156
	157	unsigned int inbound_call;
	158	unsigned int inbound_handler;
	159	unsigned int stop_polling;
	160	unsigned int inbound_queue_full;
	161	unsigned int outbound_call;
	162	unsigned int outbound_handler;
0195843b	163	unsigned int outbound_queue_full;
6486cda6 JG	164	unsigned int fast_requeue;
	165	unsigned int target_full;
	166	unsigned int eqbs;
	167	unsigned int eqbs_partial;
	168	unsigned int sqbs;
	169	unsigned int sqbs_partial;
d36deae7	170	unsigned int int_discarded;
432ac5e0	171	} ____cacheline_aligned;
6486cda6	172
d307297f JG	173	struct qdio_queue_perf_stat {
	174	/*
	175	* Sorted into order-2 buckets: 1, 2-3, 4-7, ... 64-127, 128.
	176	* Since max. 127 SBALs are scanned reuse entry for 128 as queue full
	177	* aka 127 SBALs found.
	178	*/
	179	unsigned int nr_sbals[8];
	180	unsigned int nr_sbal_error;
	181	unsigned int nr_sbal_nop;
	182	unsigned int nr_sbal_total;
	183	};
	184
d36deae7 JG	185	enum qdio_queue_irq_states {
	186	QDIO_QUEUE_IRQS_DISABLED,
	187	};
	188
779e6e1c JG	189	struct qdio_input_q {
	190	/* input buffer acknowledgement flag */
	191	int polling;
e85dea0e JG	192	/* first ACK'ed buffer */
e85dea0e JG	193	int ack_start;
50f769df JG	194	/* how much sbals are acknowledged with qebsm */
50f769df JG	195	int ack_count;
779e6e1c JG	196	/* last time of noticing incoming data */
779e6e1c JG	197	u64 timestamp;
d36deae7 JG	198	/* upper-layer polling flag */
	199	unsigned long queue_irq_state;
	200	/* callback to start upper-layer polling */
	201	void (queue_start_poll) (struct ccw_device , int, unsigned long);
1da177e4	202	};
1da177e4	203
779e6e1c	204	struct qdio_output_q {
779e6e1c JG	205	/* PCIs are enabled for the queue */
779e6e1c JG	206	int pci_out_enabled;
104ea556	207	/* cq: use asynchronous output buffers */
	208	int use_cq;
	209	/* cq: aobs used for particual SBAL */
	210	struct qaob **aobs;
	211	/* cq: sbal state related to asynchronous operation */
	212	struct qdio_outbuf_state *sbal_state;
779e6e1c JG	213	/* timer to check for more outbound work */
779e6e1c JG	214	struct timer_list timer;
3d6c76ff JG	215	/* used SBALs before tasklet schedule */
3d6c76ff JG	216	int scan_threshold;
779e6e1c	217	};
1da177e4	218
d307297f JG	219	/*
	220	* Note on cache alignment: grouped slsb and write mostly data at the beginning
	221	* sbal[] is read-only and starts on a new cacheline followed by read mostly.
	222	*/
1da177e4	223	struct qdio_q {
779e6e1c	224	struct slsb slsb;
d307297f	225
779e6e1c JG	226	union {
	227	struct qdio_input_q in;
	228	struct qdio_output_q out;
	229	} u;
1da177e4	230
779e6e1c JG	231	/*
779e6e1c JG	232	* inbound: next buffer the program should check for
d307297f	233	* outbound: next buffer to check if adapter processed it
779e6e1c JG	234	*/
779e6e1c JG	235	int first_to_check;
1da177e4	236
779e6e1c	237	/* first_to_check of the last time */
e85dea0e	238	int last_move;
1da177e4	239
779e6e1c JG	240	/* beginning position for calling the program */
779e6e1c JG	241	int first_to_kick;
1da177e4	242
779e6e1c JG	243	/* number of buffers in use by the adapter */
779e6e1c JG	244	atomic_t nr_buf_used;
1da177e4	245
779e6e1c	246	/* error condition during a data transfer */
1da177e4	247	unsigned int qdio_error;
1da177e4	248
a2b86019 JG	249	/* last scan of the queue */
	250	u64 timestamp;
	251
d307297f JG	252	struct tasklet_struct tasklet;
	253	struct qdio_queue_perf_stat q_stats;
	254
	255	struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q] ____cacheline_aligned;
	256
	257	/* queue number */
	258	int nr;
	259
	260	/* bitmask of queue number */
	261	int mask;
	262
	263	/* input or output queue */
	264	int is_input_q;
	265
	266	/* list of thinint input queues */
	267	struct list_head entry;
	268
	269	/* upper-layer program handler */
	270	qdio_handler_t (*handler);
779e6e1c	271
d307297f JG	272	struct dentry *debugfs_q;
	273	struct qdio_irq *irq_ptr;
	274	struct sl *sl;
779e6e1c	275	/*
5382fe11 JG	276	* A page is allocated under this pointer and used for slib and sl.
5382fe11 JG	277	* slib is 2048 bytes big and sl points to offset PAGE_SIZE / 2.
779e6e1c JG	278	*/
779e6e1c JG	279	struct slib *slib;
1da177e4 LT	280	} __attribute__ ((aligned(256)));
	281
	282	struct qdio_irq {
779e6e1c JG	283	struct qib qib;
	284	u32 dsci; / address of device state change indicator */
	285	struct ccw_device *cdev;
3f09bb89	286	struct dentry *debugfs_dev;
6486cda6	287	struct dentry *debugfs_perf;
1da177e4 LT	288
1da177e4 LT	289	unsigned long int_parm;
a8237fc4	290	struct subchannel_id schid;
779e6e1c	291	unsigned long sch_token; /* QEBSM facility */
8129ee16	292
1da177e4 LT	293	enum qdio_irq_states state;
1da177e4 LT	294
779e6e1c	295	struct siga_flag siga_flag; /* siga sync information from qdioac */
1da177e4	296
779e6e1c JG	297	int nr_input_qs;
779e6e1c JG	298	int nr_output_qs;
1da177e4 LT	299
1da177e4 LT	300	struct ccw1 ccw;
1da177e4 LT	301	struct ciw equeue;
	302	struct ciw aqueue;
	303
779e6e1c	304	struct qdio_ssqd_desc ssqd_desc;
779e6e1c	305	void (orig_handler) (struct ccw_device , unsigned long, struct irb *);
1da177e4	306
6486cda6	307	int perf_stat_enabled;
432ac5e0	308
1da177e4	309	struct qdr *qdr;
779e6e1c JG	310	unsigned long chsc_page;
779e6e1c JG	311
1da177e4 LT	312	struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
1da177e4 LT	313	struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];
779e6e1c	314
22f99347	315	debug_info_t *debug_area;
779e6e1c	316	struct mutex setup_mutex;
432ac5e0	317	struct qdio_dev_perf_stat perf_stat;
1da177e4	318	};
779e6e1c JG	319
	320	/* helper functions */
	321	#define queue_type(q) q->irq_ptr->qib.qfmt
22f99347	322	#define SCH_NO(q) (q->irq_ptr->schid.sch_no)
779e6e1c JG	323
	324	#define is_thinint_irq(irq) \
	325	(irq->qib.qfmt == QDIO_IQDIO_QFMT \|\| \
	326	css_general_characteristics.aif_osa)
	327
d307297f JG	328	#define qperf(__qdev, __attr) ((__qdev)->perf_stat.(__attr))
	329
	330	#define qperf_inc(__q, __attr) \
	331	({ \
	332	struct qdio_irq *qdev = (__q)->irq_ptr; \
	333	if (qdev->perf_stat_enabled) \
	334	(qdev->perf_stat.__attr)++; \
	335	})
	336
	337	static inline void account_sbals_error(struct qdio_q *q, int count)
	338	{
	339	q->q_stats.nr_sbal_error += count;
	340	q->q_stats.nr_sbal_total += count;
	341	}
6486cda6	342
779e6e1c JG	343	/* the highest iqdio queue is used for multicast */
	344	static inline int multicast_outbound(struct qdio_q *q)
	345	{
	346	return (q->irq_ptr->nr_output_qs > 1) &&
	347	(q->nr == q->irq_ptr->nr_output_qs - 1);
	348	}
	349
779e6e1c JG	350	#define pci_out_supported(q) \
	351	(q->irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
	352	#define is_qebsm(q) (q->irq_ptr->sch_token != 0)
	353
779e6e1c JG	354	#define need_siga_in(q) (q->irq_ptr->siga_flag.input)
779e6e1c JG	355	#define need_siga_out(q) (q->irq_ptr->siga_flag.output)
90adac58 JG	356	#define need_siga_sync(q) (unlikely(q->irq_ptr->siga_flag.sync))
	357	#define need_siga_sync_after_ai(q) \
	358	(unlikely(q->irq_ptr->siga_flag.sync_after_ai))
	359	#define need_siga_sync_out_after_pci(q) \
	360	(unlikely(q->irq_ptr->siga_flag.sync_out_after_pci))
779e6e1c JG	361
	362	#define for_each_input_queue(irq_ptr, q, i) \
	363	for (i = 0, q = irq_ptr->input_qs[0]; \
	364	i < irq_ptr->nr_input_qs; \
	365	q = irq_ptr->input_qs[++i])
	366	#define for_each_output_queue(irq_ptr, q, i) \
	367	for (i = 0, q = irq_ptr->output_qs[0]; \
	368	i < irq_ptr->nr_output_qs; \
	369	q = irq_ptr->output_qs[++i])
	370
	371	#define prev_buf(bufnr) \
	372	((bufnr + QDIO_MAX_BUFFERS_MASK) & QDIO_MAX_BUFFERS_MASK)
	373	#define next_buf(bufnr) \
	374	((bufnr + 1) & QDIO_MAX_BUFFERS_MASK)
	375	#define add_buf(bufnr, inc) \
	376	((bufnr + inc) & QDIO_MAX_BUFFERS_MASK)
50f769df JG	377	#define sub_buf(bufnr, dec) \
50f769df JG	378	((bufnr - dec) & QDIO_MAX_BUFFERS_MASK)
779e6e1c	379
d36deae7 JG	380	#define queue_irqs_enabled(q) \
	381	(test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) == 0)
	382	#define queue_irqs_disabled(q) \
	383	(test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0)
	384
a2b86019 JG	385	extern u64 last_ai_time;
a2b86019 JG	386
779e6e1c	387	/* prototypes for thin interrupt */
779e6e1c JG	388	void qdio_setup_thinint(struct qdio_irq *irq_ptr);
	389	int qdio_establish_thinint(struct qdio_irq *irq_ptr);
	390	void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
	391	void tiqdio_add_input_queues(struct qdio_irq *irq_ptr);
	392	void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr);
	393	void tiqdio_inbound_processing(unsigned long q);
	394	int tiqdio_allocate_memory(void);
	395	void tiqdio_free_memory(void);
	396	int tiqdio_register_thinints(void);
	397	void tiqdio_unregister_thinints(void);
5f4026f8 JG	398	void clear_nonshared_ind(struct qdio_irq *);
5f4026f8 JG	399	int test_nonshared_ind(struct qdio_irq *);
104ea556	400
779e6e1c JG	401	/* prototypes for setup */
	402	void qdio_inbound_processing(unsigned long data);
	403	void qdio_outbound_processing(unsigned long data);
	404	void qdio_outbound_timer(unsigned long data);
	405	void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
	406	struct irb *irb);
	407	int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,
	408	int nr_output_qs);
	409	void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);
bbd50e17 JG	410	int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
	411	struct subchannel_id *schid,
	412	struct qdio_ssqd_desc *data);
779e6e1c JG	413	int qdio_setup_irq(struct qdio_initialize *init_data);
	414	void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
	415	struct ccw_device *cdev);
	416	void qdio_release_memory(struct qdio_irq *irq_ptr);
50f769df JG	417	int qdio_setup_create_sysfs(struct ccw_device *cdev);
50f769df JG	418	void qdio_setup_destroy_sysfs(struct ccw_device *cdev);
779e6e1c JG	419	int qdio_setup_init(void);
779e6e1c JG	420	void qdio_setup_exit(void);
104ea556	421	int qdio_enable_async_operation(struct qdio_output_q *q);
	422	void qdio_disable_async_operation(struct qdio_output_q *q);
	423	struct qaob *qdio_allocate_aob(void);
779e6e1c	424
60b5df2f JG	425	int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
60b5df2f JG	426	unsigned char *state);
779e6e1c	427	#endif /* _CIO_QDIO_H */