1 /*
2  * linux/include/asm-s390/qdio.h
3  *
4  * Copyright 2000,2008 IBM Corp.
5  * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
6  *	      Jan Glauber <jang@linux.vnet.ibm.com>
7  *
8  */
9 #ifndef __QDIO_H__
10 #define __QDIO_H__
11 
12 #include <linux/interrupt.h>
13 #include <asm/cio.h>
14 #include <asm/ccwdev.h>
15 
16 /* only use 4 queues to save some cachelines */
17 #define QDIO_MAX_QUEUES_PER_IRQ		4
18 #define QDIO_MAX_BUFFERS_PER_Q		128
19 #define QDIO_MAX_BUFFERS_MASK		(QDIO_MAX_BUFFERS_PER_Q - 1)
20 #define QDIO_MAX_ELEMENTS_PER_BUFFER	16
21 #define QDIO_SBAL_SIZE			256
22 
23 #define QDIO_QETH_QFMT			0
24 #define QDIO_ZFCP_QFMT			1
25 #define QDIO_IQDIO_QFMT			2
26 
27 /**
28  * struct qdesfmt0 - queue descriptor, format 0
29  * @sliba: storage list information block address
30  * @sla: storage list address
31  * @slsba: storage list state block address
32  * @akey: access key for DLIB
33  * @bkey: access key for SL
34  * @ckey: access key for SBALs
35  * @dkey: access key for SLSB
36  */
37 struct qdesfmt0 {
38 	u64 sliba;
39 	u64 sla;
40 	u64 slsba;
41 	u32	 : 32;
42 	u32 akey : 4;
43 	u32 bkey : 4;
44 	u32 ckey : 4;
45 	u32 dkey : 4;
46 	u32	 : 16;
47 } __attribute__ ((packed));
48 
49 #define QDR_AC_MULTI_BUFFER_ENABLE 0x01
50 
51 /**
52  * struct qdr - queue description record (QDR)
53  * @qfmt: queue format
54  * @pfmt: implementation dependent parameter format
55  * @ac: adapter characteristics
56  * @iqdcnt: input queue descriptor count
57  * @oqdcnt: output queue descriptor count
58  * @iqdsz: inpout queue descriptor size
59  * @oqdsz: output queue descriptor size
60  * @qiba: queue information block address
61  * @qkey: queue information block key
62  * @qdf0: queue descriptions
63  */
64 struct qdr {
65 	u32 qfmt   : 8;
66 	u32 pfmt   : 8;
67 	u32	   : 8;
68 	u32 ac	   : 8;
69 	u32	   : 8;
70 	u32 iqdcnt : 8;
71 	u32	   : 8;
72 	u32 oqdcnt : 8;
73 	u32	   : 8;
74 	u32 iqdsz  : 8;
75 	u32	   : 8;
76 	u32 oqdsz  : 8;
77 	/* private: */
78 	u32 res[9];
79 	/* public: */
80 	u64 qiba;
81 	u32	   : 32;
82 	u32 qkey   : 4;
83 	u32	   : 28;
84 	struct qdesfmt0 qdf0[126];
85 } __attribute__ ((packed, aligned(4096)));
86 
87 #define QIB_AC_OUTBOUND_PCI_SUPPORTED	0x40
88 #define QIB_RFLAGS_ENABLE_QEBSM		0x80
89 #define QIB_RFLAGS_ENABLE_DATA_DIV	0x02
90 
91 /**
92  * struct qib - queue information block (QIB)
93  * @qfmt: queue format
94  * @pfmt: implementation dependent parameter format
95  * @rflags: QEBSM
96  * @ac: adapter characteristics
97  * @isliba: absolute address of first input SLIB
98  * @osliba: absolute address of first output SLIB
99  * @ebcnam: adapter identifier in EBCDIC
100  * @parm: implementation dependent parameters
101  */
102 struct qib {
103 	u32 qfmt   : 8;
104 	u32 pfmt   : 8;
105 	u32 rflags : 8;
106 	u32 ac	   : 8;
107 	u32	   : 32;
108 	u64 isliba;
109 	u64 osliba;
110 	u32	   : 32;
111 	u32	   : 32;
112 	u8 ebcnam[8];
113 	/* private: */
114 	u8 res[88];
115 	/* public: */
116 	u8 parm[QDIO_MAX_BUFFERS_PER_Q];
117 } __attribute__ ((packed, aligned(256)));
118 
119 /**
120  * struct slibe - storage list information block element (SLIBE)
121  * @parms: implementation dependent parameters
122  */
123 struct slibe {
124 	u64 parms;
125 };
126 
127 /**
128  * struct qaob - queue asynchronous operation block
129  * @res0: reserved parameters
130  * @res1: reserved parameter
131  * @res2: reserved parameter
132  * @res3: reserved parameter
133  * @aorc: asynchronous operation return code
134  * @flags: internal flags
135  * @cbtbs: control block type
136  * @sb_count: number of storage blocks
137  * @sba: storage block element addresses
138  * @dcount: size of storage block elements
139  * @user0: user defineable value
140  * @res4: reserved paramater
141  * @user1: user defineable value
142  * @user2: user defineable value
143  */
144 struct qaob {
145 	u64 res0[6];
146 	u8 res1;
147 	u8 res2;
148 	u8 res3;
149 	u8 aorc;
150 	u8 flags;
151 	u16 cbtbs;
152 	u8 sb_count;
153 	u64 sba[QDIO_MAX_ELEMENTS_PER_BUFFER];
154 	u16 dcount[QDIO_MAX_ELEMENTS_PER_BUFFER];
155 	u64 user0;
156 	u64 res4[2];
157 	u64 user1;
158 	u64 user2;
159 } __attribute__ ((packed, aligned(256)));
160 
161 /**
162  * struct slib - storage list information block (SLIB)
163  * @nsliba: next SLIB address (if any)
164  * @sla: SL address
165  * @slsba: SLSB address
166  * @slibe: SLIB elements
167  */
168 struct slib {
169 	u64 nsliba;
170 	u64 sla;
171 	u64 slsba;
172 	/* private: */
173 	u8 res[1000];
174 	/* public: */
175 	struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
176 } __attribute__ ((packed, aligned(2048)));
177 
178 #define SBAL_EFLAGS_LAST_ENTRY		0x40
179 #define SBAL_EFLAGS_CONTIGUOUS		0x20
180 #define SBAL_EFLAGS_FIRST_FRAG		0x04
181 #define SBAL_EFLAGS_MIDDLE_FRAG		0x08
182 #define SBAL_EFLAGS_LAST_FRAG		0x0c
183 #define SBAL_EFLAGS_MASK		0x6f
184 
185 #define SBAL_SFLAGS0_PCI_REQ		0x40
186 #define SBAL_SFLAGS0_DATA_CONTINUATION	0x20
187 
188 /* Awesome OpenFCP extensions */
189 #define SBAL_SFLAGS0_TYPE_STATUS	0x00
190 #define SBAL_SFLAGS0_TYPE_WRITE		0x08
191 #define SBAL_SFLAGS0_TYPE_READ		0x10
192 #define SBAL_SFLAGS0_TYPE_WRITE_READ	0x18
193 #define SBAL_SFLAGS0_MORE_SBALS		0x04
194 #define SBAL_SFLAGS0_COMMAND		0x02
195 #define SBAL_SFLAGS0_LAST_SBAL		0x00
196 #define SBAL_SFLAGS0_ONLY_SBAL		SBAL_SFLAGS0_COMMAND
197 #define SBAL_SFLAGS0_MIDDLE_SBAL	SBAL_SFLAGS0_MORE_SBALS
198 #define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND)
199 
200 /**
201  * struct qdio_buffer_element - SBAL entry
202  * @eflags: SBAL entry flags
203  * @scount: SBAL count
204  * @sflags: whole SBAL flags
205  * @length: length
206  * @addr: address
207 */
208 struct qdio_buffer_element {
209 	u8 eflags;
210 	/* private: */
211 	u8 res1;
212 	/* public: */
213 	u8 scount;
214 	u8 sflags;
215 	u32 length;
216 #ifdef CONFIG_32BIT
217 	/* private: */
218 	void *res2;
219 	/* public: */
220 #endif
221 	void *addr;
222 } __attribute__ ((packed, aligned(16)));
223 
224 /**
225  * struct qdio_buffer - storage block address list (SBAL)
226  * @element: SBAL entries
227  */
228 struct qdio_buffer {
229 	struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
230 } __attribute__ ((packed, aligned(256)));
231 
232 /**
233  * struct sl_element - storage list entry
234  * @sbal: absolute SBAL address
235  */
236 struct sl_element {
237 #ifdef CONFIG_32BIT
238 	/* private: */
239 	unsigned long reserved;
240 	/* public: */
241 #endif
242 	unsigned long sbal;
243 } __attribute__ ((packed));
244 
245 /**
246  * struct sl - storage list (SL)
247  * @element: SL entries
248  */
249 struct sl {
250 	struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
251 } __attribute__ ((packed, aligned(1024)));
252 
253 /**
254  * struct slsb - storage list state block (SLSB)
255  * @val: state per buffer
256  */
257 struct slsb {
258 	u8 val[QDIO_MAX_BUFFERS_PER_Q];
259 } __attribute__ ((packed, aligned(256)));
260 
261 #define CHSC_AC2_MULTI_BUFFER_AVAILABLE	0x0080
262 #define CHSC_AC2_MULTI_BUFFER_ENABLED	0x0040
263 #define CHSC_AC2_DATA_DIV_AVAILABLE	0x0010
264 #define CHSC_AC2_DATA_DIV_ENABLED	0x0002
265 
266 /**
267  * struct qdio_outbuf_state - SBAL related asynchronous operation information
268  *   (for communication with upper layer programs)
269  *   (only required for use with completion queues)
270  * @flags: flags indicating state of buffer
271  * @aob: pointer to QAOB used for the particular SBAL
272  * @user: pointer to upper layer program's state information related to SBAL
273  *        (stored in user1 data of QAOB)
274  */
275 struct qdio_outbuf_state {
276 	u8 flags;
277 	struct qaob *aob;
278 	void *user;
279 };
280 
281 #define QDIO_OUTBUF_STATE_FLAG_NONE	0x00
282 #define QDIO_OUTBUF_STATE_FLAG_PENDING	0x01
283 
284 #define CHSC_AC1_INITIATE_INPUTQ	0x80
285 
286 
287 /* qdio adapter-characteristics-1 flag */
288 #define AC1_SIGA_INPUT_NEEDED		0x40	/* process input queues */
289 #define AC1_SIGA_OUTPUT_NEEDED		0x20	/* process output queues */
290 #define AC1_SIGA_SYNC_NEEDED		0x10	/* ask hypervisor to sync */
291 #define AC1_AUTOMATIC_SYNC_ON_THININT	0x08	/* set by hypervisor */
292 #define AC1_AUTOMATIC_SYNC_ON_OUT_PCI	0x04	/* set by hypervisor */
293 #define AC1_SC_QEBSM_AVAILABLE		0x02	/* available for subchannel */
294 #define AC1_SC_QEBSM_ENABLED		0x01	/* enabled for subchannel */
295 
296 #define CHSC_AC2_DATA_DIV_AVAILABLE	0x0010
297 #define CHSC_AC2_DATA_DIV_ENABLED	0x0002
298 
299 #define CHSC_AC3_FORMAT2_CQ_AVAILABLE	0x8000
300 
301 struct qdio_ssqd_desc {
302 	u8 flags;
303 	u8:8;
304 	u16 sch;
305 	u8 qfmt;
306 	u8 parm;
307 	u8 qdioac1;
308 	u8 sch_class;
309 	u8 pcnt;
310 	u8 icnt;
311 	u8:8;
312 	u8 ocnt;
313 	u8:8;
314 	u8 mbccnt;
315 	u16 qdioac2;
316 	u64 sch_token;
317 	u8 mro;
318 	u8 mri;
319 	u16 qdioac3;
320 	u16:16;
321 	u8:8;
322 	u8 mmwc;
323 } __attribute__ ((packed));
324 
325 /* params are: ccw_device, qdio_error, queue_number,
326    first element processed, number of elements processed, int_parm */
327 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
328 			    int, int, unsigned long);
329 
330 /* qdio errors reported to the upper-layer program */
331 #define QDIO_ERROR_SIGA_TARGET			0x02
332 #define QDIO_ERROR_SIGA_ACCESS_EXCEPTION	0x10
333 #define QDIO_ERROR_SIGA_BUSY			0x20
334 #define QDIO_ERROR_ACTIVATE_CHECK_CONDITION	0x40
335 #define QDIO_ERROR_SLSB_STATE			0x80
336 
337 /* for qdio_cleanup */
338 #define QDIO_FLAG_CLEANUP_USING_CLEAR		0x01
339 #define QDIO_FLAG_CLEANUP_USING_HALT		0x02
340 
341 /**
342  * struct qdio_initialize - qdio initalization data
343  * @cdev: associated ccw device
344  * @q_format: queue format
345  * @adapter_name: name for the adapter
346  * @qib_param_field_format: format for qib_parm_field
347  * @qib_param_field: pointer to 128 bytes or NULL, if no param field
348  * @qib_rflags: rflags to set
349  * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
350  * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
351  * @no_input_qs: number of input queues
352  * @no_output_qs: number of output queues
353  * @input_handler: handler to be called for input queues
354  * @output_handler: handler to be called for output queues
355  * @queue_start_poll_array: polling handlers (one per input queue or NULL)
356  * @int_parm: interruption parameter
357  * @input_sbal_addr_array:  address of no_input_qs * 128 pointers
358  * @output_sbal_addr_array: address of no_output_qs * 128 pointers
359  * @output_sbal_state_array: no_output_qs * 128 state info (for CQ or NULL)
360  */
361 struct qdio_initialize {
362 	struct ccw_device *cdev;
363 	unsigned char q_format;
364 	unsigned char qdr_ac;
365 	unsigned char adapter_name[8];
366 	unsigned int qib_param_field_format;
367 	unsigned char *qib_param_field;
368 	unsigned char qib_rflags;
369 	unsigned long *input_slib_elements;
370 	unsigned long *output_slib_elements;
371 	unsigned int no_input_qs;
372 	unsigned int no_output_qs;
373 	qdio_handler_t *input_handler;
374 	qdio_handler_t *output_handler;
375 	void (**queue_start_poll_array) (struct ccw_device *, int,
376 					  unsigned long);
377 	int scan_threshold;
378 	unsigned long int_parm;
379 	void **input_sbal_addr_array;
380 	void **output_sbal_addr_array;
381 	struct qdio_outbuf_state *output_sbal_state_array;
382 };
383 
384 #define QDIO_STATE_INACTIVE		0x00000002 /* after qdio_cleanup */
385 #define QDIO_STATE_ESTABLISHED		0x00000004 /* after qdio_establish */
386 #define QDIO_STATE_ACTIVE		0x00000008 /* after qdio_activate */
387 #define QDIO_STATE_STOPPED		0x00000010 /* after queues went down */
388 
389 #define QDIO_FLAG_SYNC_INPUT		0x01
390 #define QDIO_FLAG_SYNC_OUTPUT		0x02
391 #define QDIO_FLAG_PCI_OUT		0x10
392 
393 extern int qdio_allocate(struct qdio_initialize *);
394 extern int qdio_establish(struct qdio_initialize *);
395 extern int qdio_activate(struct ccw_device *);
396 extern void qdio_release_aob(struct qaob *);
397 extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int,
398 		   unsigned int);
399 extern int qdio_start_irq(struct ccw_device *, int);
400 extern int qdio_stop_irq(struct ccw_device *, int);
401 extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *);
402 extern int qdio_shutdown(struct ccw_device *, int);
403 extern int qdio_free(struct ccw_device *);
404 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
405 
406 #endif /* __QDIO_H__ */
407