--- /dev/null
+/*
+ * 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
+
+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;
+}
+
+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; 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 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 */
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