2 * linux/drivers/s390/cio/qdio.h
4 * Copyright 2000,2009 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>
13 #include <asm/debug.h>
16 #define QDIO_BUSY_BIT_PATIENCE (100 << 12) /* 100 microseconds */
17 #define QDIO_INPUT_THRESHOLD (500 << 12) /* 500 microseconds */
20 * if an asynchronous HiperSockets queue runs full, the 10 seconds timer wait
21 * till next initiative to give transmitted skbs back to the stack is too long.
22 * Therefore polling is started in case of multicast queue is filled more
25 #define QDIO_IQDIO_POLL_LVL 65 /* HS multicast queue */
27 enum qdio_irq_states {
28 QDIO_IRQ_STATE_INACTIVE,
29 QDIO_IRQ_STATE_ESTABLISHED,
30 QDIO_IRQ_STATE_ACTIVE,
31 QDIO_IRQ_STATE_STOPPED,
32 QDIO_IRQ_STATE_CLEANUP,
37 /* used as intparm in do_IO */
38 #define QDIO_DOING_ESTABLISH 1
39 #define QDIO_DOING_ACTIVATE 2
40 #define QDIO_DOING_CLEANUP 3
42 #define SLSB_STATE_NOT_INIT 0x0
43 #define SLSB_STATE_EMPTY 0x1
44 #define SLSB_STATE_PRIMED 0x2
45 #define SLSB_STATE_HALTED 0xe
46 #define SLSB_STATE_ERROR 0xf
47 #define SLSB_TYPE_INPUT 0x0
48 #define SLSB_TYPE_OUTPUT 0x20
49 #define SLSB_OWNER_PROG 0x80
50 #define SLSB_OWNER_CU 0x40
52 #define SLSB_P_INPUT_NOT_INIT \
53 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_NOT_INIT) /* 0x80 */
54 #define SLSB_P_INPUT_ACK \
55 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x81 */
56 #define SLSB_CU_INPUT_EMPTY \
57 (SLSB_OWNER_CU | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x41 */
58 #define SLSB_P_INPUT_PRIMED \
59 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_PRIMED) /* 0x82 */
60 #define SLSB_P_INPUT_HALTED \
61 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_HALTED) /* 0x8e */
62 #define SLSB_P_INPUT_ERROR \
63 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_ERROR) /* 0x8f */
64 #define SLSB_P_OUTPUT_NOT_INIT \
65 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_NOT_INIT) /* 0xa0 */
66 #define SLSB_P_OUTPUT_EMPTY \
67 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_EMPTY) /* 0xa1 */
68 #define SLSB_CU_OUTPUT_PRIMED \
69 (SLSB_OWNER_CU | SLSB_TYPE_OUTPUT | SLSB_STATE_PRIMED) /* 0x62 */
70 #define SLSB_P_OUTPUT_HALTED \
71 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_HALTED) /* 0xae */
72 #define SLSB_P_OUTPUT_ERROR \
73 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_ERROR) /* 0xaf */
75 #define SLSB_ERROR_DURING_LOOKUP 0xff
77 /* additional CIWs returned by extended Sense-ID */
78 #define CIW_TYPE_EQUEUE 0x3 /* establish QDIO queues */
79 #define CIW_TYPE_AQUEUE 0x4 /* activate QDIO queues */
81 /* flags for st qdio sch data */
82 #define CHSC_FLAG_QDIO_CAPABILITY 0x80
83 #define CHSC_FLAG_VALIDITY 0x40
85 /* qdio adapter-characteristics-1 flag */
86 #define AC1_SIGA_INPUT_NEEDED 0x40 /* process input queues */
87 #define AC1_SIGA_OUTPUT_NEEDED 0x20 /* process output queues */
88 #define AC1_SIGA_SYNC_NEEDED 0x10 /* ask hypervisor to sync */
89 #define AC1_AUTOMATIC_SYNC_ON_THININT 0x08 /* set by hypervisor */
90 #define AC1_AUTOMATIC_SYNC_ON_OUT_PCI 0x04 /* set by hypervisor */
91 #define AC1_SC_QEBSM_AVAILABLE 0x02 /* available for subchannel */
92 #define AC1_SC_QEBSM_ENABLED 0x01 /* enabled for subchannel */
95 static inline int do_sqbs(u64 token, unsigned char state, int queue,
96 int *start, int *count)
98 register unsigned long _ccq asm ("0") = *count;
99 register unsigned long _token asm ("1") = token;
100 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
103 " .insn rsy,0xeb000000008A,%1,0,0(%2)"
104 : "+d" (_ccq), "+d" (_queuestart)
105 : "d" ((unsigned long)state), "d" (_token)
107 *count = _ccq & 0xff;
108 *start = _queuestart & 0xff;
110 return (_ccq >> 32) & 0xff;
113 static inline int do_eqbs(u64 token, unsigned char *state, int queue,
114 int *start, int *count, int ack)
116 register unsigned long _ccq asm ("0") = *count;
117 register unsigned long _token asm ("1") = token;
118 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
119 unsigned long _state = (unsigned long)ack << 63;
122 " .insn rrf,0xB99c0000,%1,%2,0,0"
123 : "+d" (_ccq), "+d" (_queuestart), "+d" (_state)
126 *count = _ccq & 0xff;
127 *start = _queuestart & 0xff;
128 *state = _state & 0xff;
130 return (_ccq >> 32) & 0xff;
133 static inline int do_sqbs(u64 token, unsigned char state, int queue,
134 int *start, int *count) { return 0; }
135 static inline int do_eqbs(u64 token, unsigned char *state, int queue,
136 int *start, int *count, int ack) { return 0; }
137 #endif /* CONFIG_64BIT */
147 u8 no_sync_out_pci:1;
149 } __attribute__ ((packed));
151 struct chsc_ssqd_area {
152 struct chsc_header request;
160 struct chsc_header response;
162 struct qdio_ssqd_desc qdio_ssqd;
163 } __attribute__ ((packed));
166 struct chsc_header request;
171 u64 summary_indicator_addr;
172 u64 subchannel_indicator_addr;
179 struct subchannel_id schid;
181 struct chsc_header response;
183 } __attribute__ ((packed));
185 struct qdio_dev_perf_stat {
186 unsigned int adapter_int;
187 unsigned int qdio_int;
188 unsigned int pci_request_int;
190 unsigned int tasklet_inbound;
191 unsigned int tasklet_inbound_resched;
192 unsigned int tasklet_inbound_resched2;
193 unsigned int tasklet_outbound;
195 unsigned int siga_read;
196 unsigned int siga_write;
197 unsigned int siga_sync;
199 unsigned int inbound_call;
200 unsigned int inbound_handler;
201 unsigned int stop_polling;
202 unsigned int inbound_queue_full;
203 unsigned int outbound_call;
204 unsigned int outbound_handler;
205 unsigned int outbound_queue_full;
206 unsigned int fast_requeue;
207 unsigned int target_full;
209 unsigned int eqbs_partial;
211 unsigned int sqbs_partial;
212 unsigned int int_discarded;
213 } ____cacheline_aligned;
215 struct qdio_queue_perf_stat {
217 * Sorted into order-2 buckets: 1, 2-3, 4-7, ... 64-127, 128.
218 * Since max. 127 SBALs are scanned reuse entry for 128 as queue full
219 * aka 127 SBALs found.
221 unsigned int nr_sbals[8];
222 unsigned int nr_sbal_error;
223 unsigned int nr_sbal_nop;
224 unsigned int nr_sbal_total;
227 enum qdio_queue_irq_states {
228 QDIO_QUEUE_IRQS_DISABLED,
231 struct qdio_input_q {
232 /* input buffer acknowledgement flag */
234 /* first ACK'ed buffer */
236 /* how much sbals are acknowledged with qebsm */
238 /* last time of noticing incoming data */
240 /* upper-layer polling flag */
241 unsigned long queue_irq_state;
242 /* callback to start upper-layer polling */
243 void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
246 struct qdio_output_q {
247 /* PCIs are enabled for the queue */
249 /* IQDIO: output multiple buffers (enhanced SIGA) */
251 /* timer to check for more outbound work */
252 struct timer_list timer;
253 /* used SBALs before tasklet schedule */
258 * Note on cache alignment: grouped slsb and write mostly data at the beginning
259 * sbal[] is read-only and starts on a new cacheline followed by read mostly.
265 struct qdio_input_q in;
266 struct qdio_output_q out;
270 * inbound: next buffer the program should check for
271 * outbound: next buffer to check if adapter processed it
275 /* first_to_check of the last time */
278 /* beginning position for calling the program */
281 /* number of buffers in use by the adapter */
282 atomic_t nr_buf_used;
284 /* error condition during a data transfer */
285 unsigned int qdio_error;
287 struct tasklet_struct tasklet;
288 struct qdio_queue_perf_stat q_stats;
290 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q] ____cacheline_aligned;
295 /* bitmask of queue number */
298 /* input or output queue */
301 /* list of thinint input queues */
302 struct list_head entry;
304 /* upper-layer program handler */
305 qdio_handler_t (*handler);
307 struct dentry *debugfs_q;
308 struct qdio_irq *irq_ptr;
311 * A page is allocated under this pointer and used for slib and sl.
312 * slib is 2048 bytes big and sl points to offset PAGE_SIZE / 2.
315 } __attribute__ ((aligned(256)));
319 u32 *dsci; /* address of device state change indicator */
320 struct ccw_device *cdev;
321 struct dentry *debugfs_dev;
322 struct dentry *debugfs_perf;
324 unsigned long int_parm;
325 struct subchannel_id schid;
326 unsigned long sch_token; /* QEBSM facility */
328 enum qdio_irq_states state;
330 struct siga_flag siga_flag; /* siga sync information from qdioac */
339 struct qdio_ssqd_desc ssqd_desc;
340 void (*orig_handler) (struct ccw_device *, unsigned long, struct irb *);
342 int perf_stat_enabled;
345 unsigned long chsc_page;
347 struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
348 struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];
350 debug_info_t *debug_area;
351 struct mutex setup_mutex;
352 struct qdio_dev_perf_stat perf_stat;
355 /* helper functions */
356 #define queue_type(q) q->irq_ptr->qib.qfmt
357 #define SCH_NO(q) (q->irq_ptr->schid.sch_no)
359 #define is_thinint_irq(irq) \
360 (irq->qib.qfmt == QDIO_IQDIO_QFMT || \
361 css_general_characteristics.aif_osa)
363 #define qperf(__qdev, __attr) ((__qdev)->perf_stat.(__attr))
365 #define qperf_inc(__q, __attr) \
367 struct qdio_irq *qdev = (__q)->irq_ptr; \
368 if (qdev->perf_stat_enabled) \
369 (qdev->perf_stat.__attr)++; \
372 static inline void account_sbals_error(struct qdio_q *q, int count)
374 q->q_stats.nr_sbal_error += count;
375 q->q_stats.nr_sbal_total += count;
378 /* the highest iqdio queue is used for multicast */
379 static inline int multicast_outbound(struct qdio_q *q)
381 return (q->irq_ptr->nr_output_qs > 1) &&
382 (q->nr == q->irq_ptr->nr_output_qs - 1);
385 #define pci_out_supported(q) \
386 (q->irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
387 #define is_qebsm(q) (q->irq_ptr->sch_token != 0)
389 #define need_siga_sync_thinint(q) (!q->irq_ptr->siga_flag.no_sync_ti)
390 #define need_siga_sync_out_thinint(q) (!q->irq_ptr->siga_flag.no_sync_out_ti)
391 #define need_siga_in(q) (q->irq_ptr->siga_flag.input)
392 #define need_siga_out(q) (q->irq_ptr->siga_flag.output)
393 #define need_siga_sync(q) (q->irq_ptr->siga_flag.sync)
394 #define siga_syncs_out_pci(q) (q->irq_ptr->siga_flag.no_sync_out_pci)
396 #define for_each_input_queue(irq_ptr, q, i) \
397 for (i = 0, q = irq_ptr->input_qs[0]; \
398 i < irq_ptr->nr_input_qs; \
399 q = irq_ptr->input_qs[++i])
400 #define for_each_output_queue(irq_ptr, q, i) \
401 for (i = 0, q = irq_ptr->output_qs[0]; \
402 i < irq_ptr->nr_output_qs; \
403 q = irq_ptr->output_qs[++i])
405 #define prev_buf(bufnr) \
406 ((bufnr + QDIO_MAX_BUFFERS_MASK) & QDIO_MAX_BUFFERS_MASK)
407 #define next_buf(bufnr) \
408 ((bufnr + 1) & QDIO_MAX_BUFFERS_MASK)
409 #define add_buf(bufnr, inc) \
410 ((bufnr + inc) & QDIO_MAX_BUFFERS_MASK)
411 #define sub_buf(bufnr, dec) \
412 ((bufnr - dec) & QDIO_MAX_BUFFERS_MASK)
414 #define queue_irqs_enabled(q) \
415 (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) == 0)
416 #define queue_irqs_disabled(q) \
417 (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0)
419 #define TIQDIO_SHARED_IND 63
421 /* device state change indicators */
423 u32 ind; /* u32 because of compare-and-swap performance */
424 atomic_t count; /* use count, 0 or 1 for non-shared indicators */
427 extern struct indicator_t *q_indicators;
429 static inline int shared_ind(u32 *dsci)
431 return dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
434 /* prototypes for thin interrupt */
435 void qdio_setup_thinint(struct qdio_irq *irq_ptr);
436 int qdio_establish_thinint(struct qdio_irq *irq_ptr);
437 void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
438 void tiqdio_add_input_queues(struct qdio_irq *irq_ptr);
439 void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr);
440 void tiqdio_inbound_processing(unsigned long q);
441 int tiqdio_allocate_memory(void);
442 void tiqdio_free_memory(void);
443 int tiqdio_register_thinints(void);
444 void tiqdio_unregister_thinints(void);
446 /* prototypes for setup */
447 void qdio_inbound_processing(unsigned long data);
448 void qdio_outbound_processing(unsigned long data);
449 void qdio_outbound_timer(unsigned long data);
450 void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
452 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,
454 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);
455 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
456 struct subchannel_id *schid,
457 struct qdio_ssqd_desc *data);
458 int qdio_setup_irq(struct qdio_initialize *init_data);
459 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
460 struct ccw_device *cdev);
461 void qdio_release_memory(struct qdio_irq *irq_ptr);
462 int qdio_setup_create_sysfs(struct ccw_device *cdev);
463 void qdio_setup_destroy_sysfs(struct ccw_device *cdev);
464 int qdio_setup_init(void);
465 void qdio_setup_exit(void);
467 int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
468 unsigned char *state);
469 #endif /* _CIO_QDIO_H */