2 * Copyright IBM Corp. 2000, 2009
3 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
4 * Jan Glauber <jang@linux.vnet.ibm.com>
10 #include <asm/schid.h>
11 #include <asm/debug.h>
14 #define QDIO_BUSY_BIT_PATIENCE (100 << 12) /* 100 microseconds */
15 #define QDIO_BUSY_BIT_RETRY_DELAY 10 /* 10 milliseconds */
16 #define QDIO_BUSY_BIT_RETRIES 1000 /* = 10s retry time */
17 #define QDIO_INPUT_THRESHOLD (500 << 12) /* 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_PENDING 0x3
38 #define SLSB_STATE_HALTED 0xe
39 #define SLSB_STATE_ERROR 0xf
40 #define SLSB_TYPE_INPUT 0x0
41 #define SLSB_TYPE_OUTPUT 0x20
42 #define SLSB_OWNER_PROG 0x80
43 #define SLSB_OWNER_CU 0x40
45 #define SLSB_P_INPUT_NOT_INIT \
46 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_NOT_INIT) /* 0x80 */
47 #define SLSB_P_INPUT_ACK \
48 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x81 */
49 #define SLSB_CU_INPUT_EMPTY \
50 (SLSB_OWNER_CU | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x41 */
51 #define SLSB_P_INPUT_PRIMED \
52 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_PRIMED) /* 0x82 */
53 #define SLSB_P_INPUT_HALTED \
54 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_HALTED) /* 0x8e */
55 #define SLSB_P_INPUT_ERROR \
56 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_ERROR) /* 0x8f */
57 #define SLSB_P_OUTPUT_NOT_INIT \
58 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_NOT_INIT) /* 0xa0 */
59 #define SLSB_P_OUTPUT_EMPTY \
60 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_EMPTY) /* 0xa1 */
61 #define SLSB_P_OUTPUT_PENDING \
62 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_PENDING) /* 0xa3 */
63 #define SLSB_CU_OUTPUT_PRIMED \
64 (SLSB_OWNER_CU | SLSB_TYPE_OUTPUT | SLSB_STATE_PRIMED) /* 0x62 */
65 #define SLSB_P_OUTPUT_HALTED \
66 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_HALTED) /* 0xae */
67 #define SLSB_P_OUTPUT_ERROR \
68 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_ERROR) /* 0xaf */
70 #define SLSB_ERROR_DURING_LOOKUP 0xff
72 /* additional CIWs returned by extended Sense-ID */
73 #define CIW_TYPE_EQUEUE 0x3 /* establish QDIO queues */
74 #define CIW_TYPE_AQUEUE 0x4 /* activate QDIO queues */
76 /* flags for st qdio sch data */
77 #define CHSC_FLAG_QDIO_CAPABILITY 0x80
78 #define CHSC_FLAG_VALIDITY 0x40
81 #define QDIO_SIGA_WRITE 0x00
82 #define QDIO_SIGA_READ 0x01
83 #define QDIO_SIGA_SYNC 0x02
84 #define QDIO_SIGA_WRITEQ 0x04
85 #define QDIO_SIGA_QEBSM_FLAG 0x80
88 static inline int do_sqbs(u64 token, unsigned char state, int queue,
89 int *start, int *count)
91 register unsigned long _ccq asm ("0") = *count;
92 register unsigned long _token asm ("1") = token;
93 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
96 " .insn rsy,0xeb000000008A,%1,0,0(%2)"
97 : "+d" (_ccq), "+d" (_queuestart)
98 : "d" ((unsigned long)state), "d" (_token)
100 *count = _ccq & 0xff;
101 *start = _queuestart & 0xff;
103 return (_ccq >> 32) & 0xff;
106 static inline int do_eqbs(u64 token, unsigned char *state, int queue,
107 int *start, int *count, int ack)
109 register unsigned long _ccq asm ("0") = *count;
110 register unsigned long _token asm ("1") = token;
111 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
112 unsigned long _state = (unsigned long)ack << 63;
115 " .insn rrf,0xB99c0000,%1,%2,0,0"
116 : "+d" (_ccq), "+d" (_queuestart), "+d" (_state)
119 *count = _ccq & 0xff;
120 *start = _queuestart & 0xff;
121 *state = _state & 0xff;
123 return (_ccq >> 32) & 0xff;
126 static inline int do_sqbs(u64 token, unsigned char state, int queue,
127 int *start, int *count) { return 0; }
128 static inline int do_eqbs(u64 token, unsigned char *state, int queue,
129 int *start, int *count, int ack) { return 0; }
130 #endif /* CONFIG_64BIT */
139 u8 sync_out_after_pci:1;
141 } __attribute__ ((packed));
143 struct qdio_dev_perf_stat {
144 unsigned int adapter_int;
145 unsigned int qdio_int;
146 unsigned int pci_request_int;
148 unsigned int tasklet_inbound;
149 unsigned int tasklet_inbound_resched;
150 unsigned int tasklet_inbound_resched2;
151 unsigned int tasklet_outbound;
153 unsigned int siga_read;
154 unsigned int siga_write;
155 unsigned int siga_sync;
157 unsigned int inbound_call;
158 unsigned int inbound_handler;
159 unsigned int stop_polling;
160 unsigned int inbound_queue_full;
161 unsigned int outbound_call;
162 unsigned int outbound_handler;
163 unsigned int outbound_queue_full;
164 unsigned int fast_requeue;
165 unsigned int target_full;
167 unsigned int eqbs_partial;
169 unsigned int sqbs_partial;
170 unsigned int int_discarded;
171 } ____cacheline_aligned;
173 struct qdio_queue_perf_stat {
175 * Sorted into order-2 buckets: 1, 2-3, 4-7, ... 64-127, 128.
176 * Since max. 127 SBALs are scanned reuse entry for 128 as queue full
177 * aka 127 SBALs found.
179 unsigned int nr_sbals[8];
180 unsigned int nr_sbal_error;
181 unsigned int nr_sbal_nop;
182 unsigned int nr_sbal_total;
185 enum qdio_queue_irq_states {
186 QDIO_QUEUE_IRQS_DISABLED,
189 struct qdio_input_q {
190 /* input buffer acknowledgement flag */
192 /* first ACK'ed buffer */
194 /* how much sbals are acknowledged with qebsm */
196 /* last time of noticing incoming data */
198 /* upper-layer polling flag */
199 unsigned long queue_irq_state;
200 /* callback to start upper-layer polling */
201 void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
204 struct qdio_output_q {
205 /* PCIs are enabled for the queue */
207 /* cq: use asynchronous output buffers */
209 /* cq: aobs used for particual SBAL */
211 /* cq: sbal state related to asynchronous operation */
212 struct qdio_outbuf_state *sbal_state;
213 /* timer to check for more outbound work */
214 struct timer_list timer;
215 /* used SBALs before tasklet schedule */
220 * Note on cache alignment: grouped slsb and write mostly data at the beginning
221 * sbal[] is read-only and starts on a new cacheline followed by read mostly.
227 struct qdio_input_q in;
228 struct qdio_output_q out;
232 * inbound: next buffer the program should check for
233 * outbound: next buffer to check if adapter processed it
237 /* first_to_check of the last time */
240 /* beginning position for calling the program */
243 /* number of buffers in use by the adapter */
244 atomic_t nr_buf_used;
246 /* error condition during a data transfer */
247 unsigned int qdio_error;
249 /* last scan of the queue */
252 struct tasklet_struct tasklet;
253 struct qdio_queue_perf_stat q_stats;
255 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q] ____cacheline_aligned;
260 /* bitmask of queue number */
263 /* input or output queue */
266 /* list of thinint input queues */
267 struct list_head entry;
269 /* upper-layer program handler */
270 qdio_handler_t (*handler);
272 struct dentry *debugfs_q;
273 struct qdio_irq *irq_ptr;
276 * A page is allocated under this pointer and used for slib and sl.
277 * slib is 2048 bytes big and sl points to offset PAGE_SIZE / 2.
280 } __attribute__ ((aligned(256)));
284 u32 *dsci; /* address of device state change indicator */
285 struct ccw_device *cdev;
286 struct dentry *debugfs_dev;
287 struct dentry *debugfs_perf;
289 unsigned long int_parm;
290 struct subchannel_id schid;
291 unsigned long sch_token; /* QEBSM facility */
293 enum qdio_irq_states state;
295 struct siga_flag siga_flag; /* siga sync information from qdioac */
304 struct qdio_ssqd_desc ssqd_desc;
305 void (*orig_handler) (struct ccw_device *, unsigned long, struct irb *);
307 int perf_stat_enabled;
310 unsigned long chsc_page;
312 struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
313 struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];
315 debug_info_t *debug_area;
316 struct mutex setup_mutex;
317 struct qdio_dev_perf_stat perf_stat;
320 /* helper functions */
321 #define queue_type(q) q->irq_ptr->qib.qfmt
322 #define SCH_NO(q) (q->irq_ptr->schid.sch_no)
324 #define is_thinint_irq(irq) \
325 (irq->qib.qfmt == QDIO_IQDIO_QFMT || \
326 css_general_characteristics.aif_osa)
328 #define qperf(__qdev, __attr) ((__qdev)->perf_stat.(__attr))
330 #define qperf_inc(__q, __attr) \
332 struct qdio_irq *qdev = (__q)->irq_ptr; \
333 if (qdev->perf_stat_enabled) \
334 (qdev->perf_stat.__attr)++; \
337 static inline void account_sbals_error(struct qdio_q *q, int count)
339 q->q_stats.nr_sbal_error += count;
340 q->q_stats.nr_sbal_total += count;
343 /* the highest iqdio queue is used for multicast */
344 static inline int multicast_outbound(struct qdio_q *q)
346 return (q->irq_ptr->nr_output_qs > 1) &&
347 (q->nr == q->irq_ptr->nr_output_qs - 1);
350 #define pci_out_supported(q) \
351 (q->irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
352 #define is_qebsm(q) (q->irq_ptr->sch_token != 0)
354 #define need_siga_in(q) (q->irq_ptr->siga_flag.input)
355 #define need_siga_out(q) (q->irq_ptr->siga_flag.output)
356 #define need_siga_sync(q) (unlikely(q->irq_ptr->siga_flag.sync))
357 #define need_siga_sync_after_ai(q) \
358 (unlikely(q->irq_ptr->siga_flag.sync_after_ai))
359 #define need_siga_sync_out_after_pci(q) \
360 (unlikely(q->irq_ptr->siga_flag.sync_out_after_pci))
362 #define for_each_input_queue(irq_ptr, q, i) \
363 for (i = 0; i < irq_ptr->nr_input_qs && \
364 ({ q = irq_ptr->input_qs[i]; 1; }); i++)
365 #define for_each_output_queue(irq_ptr, q, i) \
366 for (i = 0; i < irq_ptr->nr_output_qs && \
367 ({ q = irq_ptr->output_qs[i]; 1; }); i++)
369 #define prev_buf(bufnr) \
370 ((bufnr + QDIO_MAX_BUFFERS_MASK) & QDIO_MAX_BUFFERS_MASK)
371 #define next_buf(bufnr) \
372 ((bufnr + 1) & QDIO_MAX_BUFFERS_MASK)
373 #define add_buf(bufnr, inc) \
374 ((bufnr + inc) & QDIO_MAX_BUFFERS_MASK)
375 #define sub_buf(bufnr, dec) \
376 ((bufnr - dec) & QDIO_MAX_BUFFERS_MASK)
378 #define queue_irqs_enabled(q) \
379 (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) == 0)
380 #define queue_irqs_disabled(q) \
381 (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0)
383 extern u64 last_ai_time;
385 /* prototypes for thin interrupt */
386 void qdio_setup_thinint(struct qdio_irq *irq_ptr);
387 int qdio_establish_thinint(struct qdio_irq *irq_ptr);
388 void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
389 void tiqdio_add_input_queues(struct qdio_irq *irq_ptr);
390 void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr);
391 void tiqdio_inbound_processing(unsigned long q);
392 int tiqdio_allocate_memory(void);
393 void tiqdio_free_memory(void);
394 int tiqdio_register_thinints(void);
395 void tiqdio_unregister_thinints(void);
396 void clear_nonshared_ind(struct qdio_irq *);
397 int test_nonshared_ind(struct qdio_irq *);
399 /* prototypes for setup */
400 void qdio_inbound_processing(unsigned long data);
401 void qdio_outbound_processing(unsigned long data);
402 void qdio_outbound_timer(unsigned long data);
403 void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
405 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,
407 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);
408 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
409 struct subchannel_id *schid,
410 struct qdio_ssqd_desc *data);
411 int qdio_setup_irq(struct qdio_initialize *init_data);
412 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
413 struct ccw_device *cdev);
414 void qdio_release_memory(struct qdio_irq *irq_ptr);
415 int qdio_setup_create_sysfs(struct ccw_device *cdev);
416 void qdio_setup_destroy_sysfs(struct ccw_device *cdev);
417 int qdio_setup_init(void);
418 void qdio_setup_exit(void);
419 int qdio_enable_async_operation(struct qdio_output_q *q);
420 void qdio_disable_async_operation(struct qdio_output_q *q);
421 struct qaob *qdio_allocate_aob(void);
423 int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
424 unsigned char *state);
425 #endif /* _CIO_QDIO_H */