1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright IBM Corp. 2000, 2009
4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
5 * Jan Glauber <jang@linux.vnet.ibm.com>
11 #include <asm/schid.h>
12 #include <asm/debug.h>
15 #define QDIO_BUSY_BIT_PATIENCE (100 << 12) /* 100 microseconds */
16 #define QDIO_BUSY_BIT_RETRY_DELAY 10 /* 10 milliseconds */
17 #define QDIO_BUSY_BIT_RETRIES 1000 /* = 10s retry time */
18 #define QDIO_INPUT_THRESHOLD (500 << 12) /* 500 microseconds */
20 enum qdio_irq_states {
21 QDIO_IRQ_STATE_INACTIVE,
22 QDIO_IRQ_STATE_ESTABLISHED,
23 QDIO_IRQ_STATE_ACTIVE,
24 QDIO_IRQ_STATE_STOPPED,
25 QDIO_IRQ_STATE_CLEANUP,
30 /* used as intparm in do_IO */
31 #define QDIO_DOING_ESTABLISH 1
32 #define QDIO_DOING_ACTIVATE 2
33 #define QDIO_DOING_CLEANUP 3
35 #define SLSB_STATE_NOT_INIT 0x0
36 #define SLSB_STATE_EMPTY 0x1
37 #define SLSB_STATE_PRIMED 0x2
38 #define SLSB_STATE_PENDING 0x3
39 #define SLSB_STATE_HALTED 0xe
40 #define SLSB_STATE_ERROR 0xf
41 #define SLSB_TYPE_INPUT 0x0
42 #define SLSB_TYPE_OUTPUT 0x20
43 #define SLSB_OWNER_PROG 0x80
44 #define SLSB_OWNER_CU 0x40
46 #define SLSB_P_INPUT_NOT_INIT \
47 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_NOT_INIT) /* 0x80 */
48 #define SLSB_P_INPUT_ACK \
49 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x81 */
50 #define SLSB_CU_INPUT_EMPTY \
51 (SLSB_OWNER_CU | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x41 */
52 #define SLSB_P_INPUT_PRIMED \
53 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_PRIMED) /* 0x82 */
54 #define SLSB_P_INPUT_HALTED \
55 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_HALTED) /* 0x8e */
56 #define SLSB_P_INPUT_ERROR \
57 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_ERROR) /* 0x8f */
58 #define SLSB_P_OUTPUT_NOT_INIT \
59 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_NOT_INIT) /* 0xa0 */
60 #define SLSB_P_OUTPUT_EMPTY \
61 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_EMPTY) /* 0xa1 */
62 #define SLSB_P_OUTPUT_PENDING \
63 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_PENDING) /* 0xa3 */
64 #define SLSB_CU_OUTPUT_PRIMED \
65 (SLSB_OWNER_CU | SLSB_TYPE_OUTPUT | SLSB_STATE_PRIMED) /* 0x62 */
66 #define SLSB_P_OUTPUT_HALTED \
67 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_HALTED) /* 0xae */
68 #define SLSB_P_OUTPUT_ERROR \
69 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_ERROR) /* 0xaf */
71 #define SLSB_ERROR_DURING_LOOKUP 0xff
73 /* additional CIWs returned by extended Sense-ID */
74 #define CIW_TYPE_EQUEUE 0x3 /* establish QDIO queues */
75 #define CIW_TYPE_AQUEUE 0x4 /* activate QDIO queues */
77 /* flags for st qdio sch data */
78 #define CHSC_FLAG_QDIO_CAPABILITY 0x80
79 #define CHSC_FLAG_VALIDITY 0x40
82 #define QDIO_SIGA_WRITE 0x00
83 #define QDIO_SIGA_READ 0x01
84 #define QDIO_SIGA_SYNC 0x02
85 #define QDIO_SIGA_WRITEM 0x03
86 #define QDIO_SIGA_WRITEQ 0x04
87 #define QDIO_SIGA_QEBSM_FLAG 0x80
89 static inline int do_sqbs(u64 token, unsigned char state, int queue,
90 int *start, int *count)
92 register unsigned long _ccq asm ("0") = *count;
93 register unsigned long _token asm ("1") = token;
94 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
97 " .insn rsy,0xeb000000008A,%1,0,0(%2)"
98 : "+d" (_ccq), "+d" (_queuestart)
99 : "d" ((unsigned long)state), "d" (_token)
101 *count = _ccq & 0xff;
102 *start = _queuestart & 0xff;
104 return (_ccq >> 32) & 0xff;
107 static inline int do_eqbs(u64 token, unsigned char *state, int queue,
108 int *start, int *count, int ack)
110 register unsigned long _ccq asm ("0") = *count;
111 register unsigned long _token asm ("1") = token;
112 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
113 unsigned long _state = (unsigned long)ack << 63;
116 " .insn rrf,0xB99c0000,%1,%2,0,0"
117 : "+d" (_ccq), "+d" (_queuestart), "+d" (_state)
120 *count = _ccq & 0xff;
121 *start = _queuestart & 0xff;
122 *state = _state & 0xff;
124 return (_ccq >> 32) & 0xff;
134 u8 sync_out_after_pci:1;
136 } __attribute__ ((packed));
138 struct qdio_dev_perf_stat {
139 unsigned int adapter_int;
140 unsigned int qdio_int;
141 unsigned int pci_request_int;
143 unsigned int tasklet_inbound;
144 unsigned int tasklet_inbound_resched;
145 unsigned int tasklet_inbound_resched2;
146 unsigned int tasklet_outbound;
148 unsigned int siga_read;
149 unsigned int siga_write;
150 unsigned int siga_sync;
152 unsigned int inbound_call;
153 unsigned int inbound_handler;
154 unsigned int stop_polling;
155 unsigned int inbound_queue_full;
156 unsigned int outbound_call;
157 unsigned int outbound_handler;
158 unsigned int outbound_queue_full;
159 unsigned int fast_requeue;
160 unsigned int target_full;
162 unsigned int eqbs_partial;
164 unsigned int sqbs_partial;
165 unsigned int int_discarded;
166 } ____cacheline_aligned;
168 struct qdio_queue_perf_stat {
170 * Sorted into order-2 buckets: 1, 2-3, 4-7, ... 64-127, 128.
171 * Since max. 127 SBALs are scanned reuse entry for 128 as queue full
172 * aka 127 SBALs found.
174 unsigned int nr_sbals[8];
175 unsigned int nr_sbal_error;
176 unsigned int nr_sbal_nop;
177 unsigned int nr_sbal_total;
180 enum qdio_queue_irq_states {
181 QDIO_QUEUE_IRQS_DISABLED,
184 struct qdio_input_q {
185 /* first ACK'ed buffer */
187 /* how many SBALs are acknowledged */
189 /* last time of noticing incoming data */
191 /* upper-layer polling flag */
192 unsigned long queue_irq_state;
193 /* callback to start upper-layer polling */
194 void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
197 struct qdio_output_q {
198 /* PCIs are enabled for the queue */
200 /* cq: use asynchronous output buffers */
202 /* cq: aobs used for particual SBAL */
204 /* cq: sbal state related to asynchronous operation */
205 struct qdio_outbuf_state *sbal_state;
206 /* timer to check for more outbound work */
207 struct timer_list timer;
211 * Note on cache alignment: grouped slsb and write mostly data at the beginning
212 * sbal[] is read-only and starts on a new cacheline followed by read mostly.
218 struct qdio_input_q in;
219 struct qdio_output_q out;
223 * inbound: next buffer the program should check for
224 * outbound: next buffer to check if adapter processed it
228 /* beginning position for calling the program */
231 /* number of buffers in use by the adapter */
232 atomic_t nr_buf_used;
234 /* error condition during a data transfer */
235 unsigned int qdio_error;
237 /* last scan of the queue */
240 struct tasklet_struct tasklet;
241 struct qdio_queue_perf_stat q_stats;
243 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q] ____cacheline_aligned;
248 /* bitmask of queue number */
251 /* input or output queue */
254 /* upper-layer program handler */
255 qdio_handler_t (*handler);
257 struct dentry *debugfs_q;
258 struct qdio_irq *irq_ptr;
261 * A page is allocated under this pointer and used for slib and sl.
262 * slib is 2048 bytes big and sl points to offset PAGE_SIZE / 2.
265 } __attribute__ ((aligned(256)));
269 u32 *dsci; /* address of device state change indicator */
270 struct ccw_device *cdev;
271 struct list_head entry; /* list of thinint devices */
272 struct dentry *debugfs_dev;
273 struct dentry *debugfs_perf;
275 unsigned long int_parm;
276 struct subchannel_id schid;
277 unsigned long sch_token; /* QEBSM facility */
279 enum qdio_irq_states state;
281 struct siga_flag siga_flag; /* siga sync information from qdioac */
290 struct qdio_ssqd_desc ssqd_desc;
291 void (*orig_handler) (struct ccw_device *, unsigned long, struct irb *);
293 unsigned int scan_threshold; /* used SBALs before tasklet schedule */
294 int perf_stat_enabled;
297 unsigned long chsc_page;
299 struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
300 struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];
302 debug_info_t *debug_area;
303 struct mutex setup_mutex;
304 struct qdio_dev_perf_stat perf_stat;
307 /* helper functions */
308 #define queue_type(q) q->irq_ptr->qib.qfmt
309 #define SCH_NO(q) (q->irq_ptr->schid.sch_no)
311 #define is_thinint_irq(irq) \
312 (irq->qib.qfmt == QDIO_IQDIO_QFMT || \
313 css_general_characteristics.aif_osa)
315 #define qperf(__qdev, __attr) ((__qdev)->perf_stat.(__attr))
317 #define QDIO_PERF_STAT_INC(__irq, __attr) \
319 struct qdio_irq *qdev = __irq; \
320 if (qdev->perf_stat_enabled) \
321 (qdev->perf_stat.__attr)++; \
324 #define qperf_inc(__q, __attr) QDIO_PERF_STAT_INC((__q)->irq_ptr, __attr)
326 static inline void account_sbals_error(struct qdio_q *q, int count)
328 q->q_stats.nr_sbal_error += count;
329 q->q_stats.nr_sbal_total += count;
332 /* the highest iqdio queue is used for multicast */
333 static inline int multicast_outbound(struct qdio_q *q)
335 return (q->irq_ptr->nr_output_qs > 1) &&
336 (q->nr == q->irq_ptr->nr_output_qs - 1);
339 #define pci_out_supported(irq) ((irq)->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
340 #define is_qebsm(q) (q->irq_ptr->sch_token != 0)
342 #define need_siga_in(q) (q->irq_ptr->siga_flag.input)
343 #define need_siga_out(q) (q->irq_ptr->siga_flag.output)
344 #define need_siga_sync(q) (unlikely(q->irq_ptr->siga_flag.sync))
345 #define need_siga_sync_after_ai(q) \
346 (unlikely(q->irq_ptr->siga_flag.sync_after_ai))
347 #define need_siga_sync_out_after_pci(q) \
348 (unlikely(q->irq_ptr->siga_flag.sync_out_after_pci))
350 #define for_each_input_queue(irq_ptr, q, i) \
351 for (i = 0; i < irq_ptr->nr_input_qs && \
352 ({ q = irq_ptr->input_qs[i]; 1; }); i++)
353 #define for_each_output_queue(irq_ptr, q, i) \
354 for (i = 0; i < irq_ptr->nr_output_qs && \
355 ({ q = irq_ptr->output_qs[i]; 1; }); i++)
357 #define add_buf(bufnr, inc) QDIO_BUFNR((bufnr) + (inc))
358 #define next_buf(bufnr) add_buf(bufnr, 1)
359 #define sub_buf(bufnr, dec) QDIO_BUFNR((bufnr) - (dec))
360 #define prev_buf(bufnr) sub_buf(bufnr, 1)
362 #define queue_irqs_enabled(q) \
363 (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) == 0)
364 #define queue_irqs_disabled(q) \
365 (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0)
367 extern u64 last_ai_time;
369 /* prototypes for thin interrupt */
370 void qdio_setup_thinint(struct qdio_irq *irq_ptr);
371 int qdio_establish_thinint(struct qdio_irq *irq_ptr);
372 void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
373 void tiqdio_add_device(struct qdio_irq *irq_ptr);
374 void tiqdio_remove_device(struct qdio_irq *irq_ptr);
375 void tiqdio_inbound_processing(unsigned long q);
376 int tiqdio_allocate_memory(void);
377 void tiqdio_free_memory(void);
378 int tiqdio_register_thinints(void);
379 void tiqdio_unregister_thinints(void);
380 void clear_nonshared_ind(struct qdio_irq *);
381 int test_nonshared_ind(struct qdio_irq *);
383 /* prototypes for setup */
384 void qdio_inbound_processing(unsigned long data);
385 void qdio_outbound_processing(unsigned long data);
386 void qdio_outbound_timer(struct timer_list *t);
387 void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
389 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,
391 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);
392 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
393 struct subchannel_id *schid,
394 struct qdio_ssqd_desc *data);
395 int qdio_setup_irq(struct qdio_initialize *init_data);
396 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
397 struct ccw_device *cdev);
398 void qdio_release_memory(struct qdio_irq *irq_ptr);
399 int qdio_setup_create_sysfs(struct ccw_device *cdev);
400 void qdio_setup_destroy_sysfs(struct ccw_device *cdev);
401 int qdio_setup_init(void);
402 void qdio_setup_exit(void);
403 int qdio_enable_async_operation(struct qdio_output_q *q);
404 void qdio_disable_async_operation(struct qdio_output_q *q);
405 struct qaob *qdio_allocate_aob(void);
407 int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
408 unsigned char *state);
409 #endif /* _CIO_QDIO_H */