389 строки
11 KiB
C
389 строки
11 KiB
C
/*
|
|
* 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 */
|
|
|
|
/*
|
|
* if an asynchronous HiperSockets queue runs full, the 10 seconds timer wait
|
|
* till next initiative to give transmitted skbs back to the stack is too long.
|
|
* Therefore polling is started in case of multicast queue is filled more
|
|
* than 50 percent.
|
|
*/
|
|
#define QDIO_IQDIO_POLL_LVL 65 /* HS multicast queue */
|
|
|
|
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;
|
|
|
|
/* IQDIO: output multiple buffers (enhanced SIGA) */
|
|
int use_enh_siga;
|
|
|
|
/* 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 */
|