351 строка
9.7 KiB
C
351 строка
9.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* 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 */
|
|
|
|
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_WRITEM 0x03
|
|
#define QDIO_SIGA_WRITEQ 0x04
|
|
#define QDIO_SIGA_QEBSM_FLAG 0x80
|
|
|
|
static inline int do_sqbs(u64 token, unsigned char state, int queue,
|
|
int *start, int *count)
|
|
{
|
|
unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
|
|
unsigned long _ccq = *count;
|
|
|
|
asm volatile(
|
|
" lgr 1,%[token]\n"
|
|
" .insn rsy,0xeb000000008a,%[qs],%[ccq],0(%[state])"
|
|
: [ccq] "+&d" (_ccq), [qs] "+&d" (_queuestart)
|
|
: [state] "d" ((unsigned long)state), [token] "d" (token)
|
|
: "memory", "cc", "1");
|
|
*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)
|
|
{
|
|
unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
|
|
unsigned long _state = (unsigned long)ack << 63;
|
|
unsigned long _ccq = *count;
|
|
|
|
asm volatile(
|
|
" lgr 1,%[token]\n"
|
|
" .insn rrf,0xb99c0000,%[qs],%[state],%[ccq],0"
|
|
: [ccq] "+&d" (_ccq), [qs] "+&d" (_queuestart),
|
|
[state] "+&d" (_state)
|
|
: [token] "d" (token)
|
|
: "memory", "cc", "1");
|
|
*count = _ccq & 0xff;
|
|
*start = _queuestart & 0xff;
|
|
*state = _state & 0xff;
|
|
|
|
return (_ccq >> 32) & 0xff;
|
|
}
|
|
|
|
struct qdio_irq;
|
|
|
|
struct qdio_dev_perf_stat {
|
|
unsigned int adapter_int;
|
|
unsigned int qdio_int;
|
|
|
|
unsigned int siga_read;
|
|
unsigned int siga_write;
|
|
unsigned int siga_sync;
|
|
|
|
unsigned int inbound_call;
|
|
unsigned int stop_polling;
|
|
unsigned int inbound_queue_full;
|
|
unsigned int outbound_call;
|
|
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. */
|
|
unsigned int nr_sbals[8];
|
|
unsigned int nr_sbal_error;
|
|
unsigned int nr_sbal_nop;
|
|
unsigned int nr_sbal_total;
|
|
};
|
|
|
|
enum qdio_irq_poll_states {
|
|
QDIO_IRQ_DISABLED,
|
|
};
|
|
|
|
struct qdio_input_q {
|
|
/* Batch of SBALs that we processed while polling the queue: */
|
|
unsigned int batch_start;
|
|
unsigned int batch_count;
|
|
};
|
|
|
|
struct qdio_output_q {
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/* number of buffers in use by the adapter */
|
|
atomic_t nr_buf_used;
|
|
|
|
/* last scan of the queue */
|
|
u64 timestamp;
|
|
|
|
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;
|
|
|
|
/* upper-layer program handler */
|
|
qdio_handler_t (*handler);
|
|
|
|
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 list_head entry; /* list of thinint devices */
|
|
struct dentry *debugfs_dev;
|
|
u64 last_data_irq_time;
|
|
|
|
unsigned long int_parm;
|
|
struct subchannel_id schid;
|
|
unsigned long sch_token; /* QEBSM facility */
|
|
|
|
enum qdio_irq_states state;
|
|
u8 qdioac1;
|
|
|
|
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];
|
|
unsigned int max_input_qs;
|
|
unsigned int max_output_qs;
|
|
|
|
void (*irq_poll)(struct ccw_device *cdev, unsigned long data);
|
|
unsigned long poll_state;
|
|
|
|
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 QDIO_PERF_STAT_INC(__irq, __attr) \
|
|
({ \
|
|
struct qdio_irq *qdev = __irq; \
|
|
if (qdev->perf_stat_enabled) \
|
|
(qdev->perf_stat.__attr)++; \
|
|
})
|
|
|
|
#define qperf_inc(__q, __attr) QDIO_PERF_STAT_INC((__q)->irq_ptr, __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);
|
|
}
|
|
|
|
static inline void qdio_deliver_irq(struct qdio_irq *irq)
|
|
{
|
|
if (!test_and_set_bit(QDIO_IRQ_DISABLED, &irq->poll_state))
|
|
irq->irq_poll(irq->cdev, irq->int_parm);
|
|
else
|
|
QDIO_PERF_STAT_INC(irq, int_discarded);
|
|
}
|
|
|
|
#define pci_out_supported(irq) ((irq)->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
|
|
#define is_qebsm(q) (q->irq_ptr->sch_token != 0)
|
|
|
|
#define qdio_need_siga_in(irq) ((irq)->qdioac1 & AC1_SIGA_INPUT_NEEDED)
|
|
#define qdio_need_siga_out(irq) ((irq)->qdioac1 & AC1_SIGA_OUTPUT_NEEDED)
|
|
#define qdio_need_siga_sync(irq) (unlikely((irq)->qdioac1 & AC1_SIGA_SYNC_NEEDED))
|
|
|
|
#define for_each_input_queue(irq_ptr, q, i) \
|
|
for (i = 0; i < irq_ptr->nr_input_qs && \
|
|
({ q = irq_ptr->input_qs[i]; 1; }); i++)
|
|
#define for_each_output_queue(irq_ptr, q, i) \
|
|
for (i = 0; i < irq_ptr->nr_output_qs && \
|
|
({ q = irq_ptr->output_qs[i]; 1; }); i++)
|
|
|
|
#define add_buf(bufnr, inc) QDIO_BUFNR((bufnr) + (inc))
|
|
#define next_buf(bufnr) add_buf(bufnr, 1)
|
|
#define sub_buf(bufnr, dec) QDIO_BUFNR((bufnr) - (dec))
|
|
#define prev_buf(bufnr) sub_buf(bufnr, 1)
|
|
|
|
extern u64 last_ai_time;
|
|
|
|
/* prototypes for thin interrupt */
|
|
int qdio_establish_thinint(struct qdio_irq *irq_ptr);
|
|
void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
|
|
int qdio_thinint_init(void);
|
|
void qdio_thinint_exit(void);
|
|
int test_nonshared_ind(struct qdio_irq *);
|
|
|
|
/* prototypes for setup */
|
|
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_irq *irq_ptr, struct qdio_initialize *init_data);
|
|
void qdio_shutdown_irq(struct qdio_irq *irq);
|
|
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr);
|
|
void qdio_free_queues(struct qdio_irq *irq_ptr);
|
|
int qdio_setup_init(void);
|
|
void qdio_setup_exit(void);
|
|
|
|
int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
|
|
unsigned char *state);
|
|
#endif /* _CIO_QDIO_H */
|