2 * linux/drivers/s390/cio/qdio.h
4 * Copyright 2000,2008 IBM Corp.
5 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
6 * Jan Glauber <jang@linux.vnet.ibm.com>
12 #include <asm/schid.h>
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 */
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,
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
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
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 */
67 #define SLSB_ERROR_DURING_LOOKUP 0xff
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 */
73 /* flags for st qdio sch data */
74 #define CHSC_FLAG_QDIO_CAPABILITY 0x80
75 #define CHSC_FLAG_VALIDITY 0x40
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 */
87 static inline int do_sqbs(u64 token, unsigned char state, int queue,
88 int *start, int *count)
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;
95 " .insn rsy,0xeb000000008A,%1,0,0(%2)"
96 : "+d" (_ccq), "+d" (_queuestart)
97 : "d" ((unsigned long)state), "d" (_token)
100 *start = _queuestart & 0xff;
102 return (_ccq >> 32) & 0xff;
105 static inline int do_eqbs(u64 token, unsigned char *state, int queue,
106 int *start, int *count)
108 register unsigned long _ccq asm ("0") = *count;
109 register unsigned long _token asm ("1") = token;
110 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
111 unsigned long _state = 0;
114 " .insn rrf,0xB99c0000,%1,%2,0,0"
115 : "+d" (_ccq), "+d" (_queuestart), "+d" (_state)
118 *count = _ccq & 0xff;
119 *start = _queuestart & 0xff;
120 *state = _state & 0xff;
122 return (_ccq >> 32) & 0xff;
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 */
139 u8 no_sync_out_pci:1;
141 } __attribute__ ((packed));
143 struct chsc_ssqd_area {
144 struct chsc_header request;
152 struct chsc_header response;
154 struct qdio_ssqd_desc qdio_ssqd;
155 } __attribute__ ((packed));
158 struct chsc_header request;
163 u64 summary_indicator_addr;
164 u64 subchannel_indicator_addr;
171 struct subchannel_id schid;
173 struct chsc_header response;
175 } __attribute__ ((packed));
177 struct qdio_input_q {
178 /* input buffer acknowledgement flag */
181 /* last time of noticing incoming data */
184 /* lock for clearing the acknowledgement */
188 struct qdio_output_q {
189 /* failed siga-w attempts*/
190 atomic_t busy_siga_counter;
192 /* start time of busy condition */
195 /* PCIs are enabled for the queue */
198 /* timer to check for more outbound work */
199 struct timer_list timer;
205 struct qdio_input_q in;
206 struct qdio_output_q out;
212 /* bitmask of queue number */
215 /* input or output queue */
218 /* list of thinint input queues */
219 struct list_head entry;
221 /* upper-layer program handler */
222 qdio_handler_t (*handler);
225 * inbound: next buffer the program should check for
226 * outbound: next buffer to check for having been processed
231 /* first_to_check of the last time */
234 /* beginning position for calling the program */
237 /* number of buffers in use by the adapter */
238 atomic_t nr_buf_used;
240 struct qdio_irq *irq_ptr;
241 struct tasklet_struct tasklet;
243 /* error condition during a data transfer */
244 unsigned int qdio_error;
247 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];
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
256 } __attribute__ ((aligned(256)));
260 u32 *dsci; /* address of device state change indicator */
261 struct ccw_device *cdev;
263 unsigned long int_parm;
264 struct subchannel_id schid;
265 unsigned long sch_token; /* QEBSM facility */
267 enum qdio_irq_states state;
269 struct siga_flag siga_flag; /* siga sync information from qdioac */
278 struct qdio_ssqd_desc ssqd_desc;
280 void (*orig_handler) (struct ccw_device *, unsigned long, struct irb *);
283 * Warning: Leave these members together at the end so they won't be
284 * cleared in qdio_setup_irq.
287 unsigned long chsc_page;
289 struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
290 struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];
292 struct mutex setup_mutex;
295 /* helper functions */
296 #define queue_type(q) q->irq_ptr->qib.qfmt
298 #define is_thinint_irq(irq) \
299 (irq->qib.qfmt == QDIO_IQDIO_QFMT || \
300 css_general_characteristics.aif_osa)
302 /* the highest iqdio queue is used for multicast */
303 static inline int multicast_outbound(struct qdio_q *q)
305 return (q->irq_ptr->nr_output_qs > 1) &&
306 (q->nr == q->irq_ptr->nr_output_qs - 1);
309 static inline unsigned long long get_usecs(void)
311 return monotonic_clock() >> 12;
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)
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)
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])
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)
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);
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);
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,
367 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_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);
377 #endif /* _CIO_QDIO_H */