xref: /illumos-gate/usr/src/uts/common/sys/devops.h (revision cd21e7c5)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 /*
26  * Copyright 2012 Garrett D'Amore <garrett@damore.org>.  All rights reserved.
27  */
28 
29 #ifndef	_SYS_DEVOPS_H
30 #define	_SYS_DEVOPS_H
31 
32 #include <sys/types.h>
33 #include <sys/cred.h>
34 #include <sys/uio.h>
35 #include <sys/buf.h>
36 #include <sys/poll.h>
37 #include <vm/as.h>
38 
39 #include <sys/dditypes.h>
40 #include <sys/ddidmareq.h>
41 #include <sys/ddimapreq.h>
42 #include <sys/ddipropdefs.h>
43 #include <sys/ddidevmap.h>
44 #include <sys/ddifm.h>
45 #include <sys/nexusdefs.h>
46 #include <sys/ddi_intr.h>
47 #include <sys/ddi_hp.h>
48 #include <sys/ddi_hp_impl.h>
49 #include <sys/aio_req.h>
50 #include <vm/page.h>
51 
52 #ifdef	__cplusplus
53 extern "C" {
54 #endif
55 
56 #ifdef	_KERNEL
57 
58 /*
59  * cb_ops:	Leaf device drivers or bus nexus drivers supporting
60  *		direct user process access (open/close/etc).
61  *
62  * This is an OR of cdevsw and bdevsw fields for drivers that
63  * support both character and block entry points.
64  *
65  * For streams stuff, see also sys/stream.h.
66  *
67  * The following DDI/DKI or DKI only or DDI only functions are
68  * provided in the character/block driver operations structure.
69  *
70  *	block/char	Function	description
71  *	b/c		XXopen		DDI/DKI
72  *	b/c		XXclose		DDI/DKI
73  *	b		XXstrategy	DDI/DKI
74  *	b  		XXprint		DDI/DKI
75  *	b  		XXdump		DDI(Sun)
76  *	  c		XXread		DDI/DKI
77  *	  c		XXwrite		DDI/DKI
78  *	  c		XXioctl		DDI/DKI
79  *	  c		XXdevmap	DDI(Sun)
80  *	  c		XXmmap		DKI(Obsolete)
81  *	  c		XXsegmap	DKI
82  *	  c		XXchpoll	DDI/DKI
83  *	  c		XXprop_op	DDI(Sun)
84  *	  c		XXaread		DDI(Sun)
85  *	  c		XXawrite	DDI(Sun)
86  */
87 
88 struct cb_ops  {
89 	int	(*cb_open)(dev_t *devp, int flag, int otyp, cred_t *credp);
90 	int	(*cb_close)(dev_t dev, int flag, int otyp, cred_t *credp);
91 	int	(*cb_strategy)(struct buf *bp);
92 	int	(*cb_print)(dev_t dev, char *str);
93 	int	(*cb_dump)(dev_t dev, caddr_t addr, daddr_t blkno, int nblk);
94 	int	(*cb_read)(dev_t dev, struct uio *uiop, cred_t *credp);
95 	int	(*cb_write)(dev_t dev, struct uio *uiop, cred_t *credp);
96 	int	(*cb_ioctl)(dev_t dev, int cmd, intptr_t arg, int mode,
97 		    cred_t *credp, int *rvalp);
98 	int	(*cb_devmap)(dev_t dev, devmap_cookie_t dhp, offset_t off,
99 			size_t len, size_t *maplen, uint_t model);
100 	int	(*cb_mmap)(dev_t dev, off_t off, int prot);
101 	int	(*cb_segmap)(dev_t dev, off_t off, struct as *asp,
102 		    caddr_t *addrp, off_t len, unsigned int prot,
103 		    unsigned int maxprot, unsigned int flags, cred_t *credp);
104 	int	(*cb_chpoll)(dev_t dev, short events, int anyyet,
105 		    short *reventsp, struct pollhead **phpp);
106 	int	(*cb_prop_op)(dev_t dev, dev_info_t *dip,
107 		    ddi_prop_op_t prop_op, int mod_flags,
108 		    char *name, caddr_t valuep, int *length);
109 
110 	struct streamtab *cb_str;	/* streams information */
111 
112 	/*
113 	 * The cb_flag fields are here to tell the system a
114 	 * bit about the device. The bit definitions are
115 	 * in <sys/conf.h>.
116 	 */
117 	int	cb_flag;		/* driver compatibility flag */
118 	int	cb_rev;			/* cb_ops version number */
119 	int	(*cb_aread)(dev_t dev, struct aio_req *aio, cred_t *credp);
120 	int	(*cb_awrite)(dev_t dev, struct aio_req *aio, cred_t *credp);
121 };
122 
123 /*
124  * bus_ops:	bus nexus drivers only.
125  *
126  * These functions are used to implement the Sun DDI functions
127  * described elsewhere.
128  *
129  * Only nexus drivers support these entry points.
130  *
131  * The following bus nexus functions are provided in the bus nexus
132  * driver operations structure.  Note that all functions take both
133  * their dip and the requesters dip except for the child functions since
134  * they will be called from outside the ddi.
135  *
136  *	bus_map			-  Map/unmap/control IU -> device mappings.
137  *	bus_get_intrspec	-  obsolete, not called
138  *	bus_add_intrspec	-  obsolete, not called
139  *	bus_remove_intrspec	-  obsolete, not called
140  *	bus_map_fault		-  bus fault handler
141  *	bus_dma_map		-  obsolete, not called
142  *	bus_dma_allochdl	-  allocate a DMA handle
143  *	bus_dma_freehdl		-  free a DMA handle
144  *	bus_dma_bindhdl		-  bind a DMA handle to physical mapping
145  *	bus_dma_unbindhdl	-  unbind a DMA handle to physical mapping
146  *	bus_dma_flush		-  flush DMA caches
147  *	bus_dma_win		-  access DMA windows
148  *	bus_dma_ctl		-  control dma mapping (legacy use only)
149  *	bus_ctl			-  generic control operations
150  *	bus_prop_op		-  request for property
151  *	bus_get_eventcookie	-  get an event cookie
152  *	bus_add_eventcall	-  event call management
153  *	bus_remove_eventcall	-  event call management
154  *	bus_post_event		-  post an event
155  *	bus_config		-  child node configuration
156  *	bus_unconfig		-  child node unconfiguration
157  *	bus_fm_init		-  FMA support
158  *	bus_fm_fini		-  FMA support
159  *	bus_fm_access_enter	-  FMA support
160  *	bus_fm_access_exit	-  FMA support
161  *	bus_power		-  power management
162  *	bus_intr_op		-  control interrupt mappings
163  *	bus_hp_op		-  hotplug support
164  */
165 
166 #define	BUSO_REV_3	3
167 #define	BUSO_REV_4	4
168 #define	BUSO_REV_5	5
169 #define	BUSO_REV_6	6
170 #define	BUSO_REV_7	7
171 #define	BUSO_REV_8	8
172 #define	BUSO_REV_9	9
173 #define	BUSO_REV_10	10
174 #define	BUSO_REV	BUSO_REV_10
175 
176 
177 struct bus_ops  {
178 	int		busops_rev;	/* rev of this structure */
179 	int		(*bus_map)(dev_info_t *dip, dev_info_t *rdip,
180 			    ddi_map_req_t *mp, off_t offset, off_t len,
181 			    caddr_t *vaddrp);
182 
183 	/*
184 	 * NOTE: the following 3 busops entrypoints are obsoleted with
185 	 * version 9 or greater. Use bus_intr_op interface in place of
186 	 * these obsolete interfaces.
187 	 */
188 	ddi_intrspec_t	(*bus_get_intrspec)(dev_info_t *dip, dev_info_t *rdip,
189 			    uint_t inumber);
190 	int		(*bus_add_intrspec)(dev_info_t *dip,
191 			    dev_info_t *rdip, ddi_intrspec_t intrspec,
192 			    ddi_iblock_cookie_t *ibcp,
193 			    ddi_idevice_cookie_t *idcp,
194 			    uint_t (*int_handler)(caddr_t intr_handler_arg),
195 			    caddr_t intr_handler_arg, int kind);
196 	void		(*bus_remove_intrspec)(dev_info_t *dip,
197 			    dev_info_t *rdip, ddi_intrspec_t intrspec,
198 			    ddi_iblock_cookie_t iblock_cookie);
199 
200 	int		(*bus_map_fault)(dev_info_t *dip, dev_info_t *rdip,
201 			    struct hat *hat, struct seg *seg, caddr_t addr,
202 			    struct devpage *dp, pfn_t pfn, uint_t prot,
203 			    uint_t lock);
204 	int		(*bus_dma_map)(dev_info_t *dip, dev_info_t *rdip,
205 			    struct ddi_dma_req *dmareq,
206 			    ddi_dma_handle_t *handlep);
207 	int		(*bus_dma_allochdl)(dev_info_t *dip, dev_info_t *rdip,
208 			    ddi_dma_attr_t *attr, int (*waitfp)(caddr_t),
209 			    caddr_t arg, ddi_dma_handle_t *handlep);
210 	int		(*bus_dma_freehdl)(dev_info_t *dip, dev_info_t *rdip,
211 			    ddi_dma_handle_t handle);
212 	int		(*bus_dma_bindhdl)(dev_info_t *dip, dev_info_t *rdip,
213 			    ddi_dma_handle_t handle, struct ddi_dma_req *dmareq,
214 			    ddi_dma_cookie_t *, uint_t *);
215 	int		(*bus_dma_unbindhdl)(dev_info_t *dip, dev_info_t *rdip,
216 			    ddi_dma_handle_t handle);
217 	int		(*bus_dma_flush)(dev_info_t *dip, dev_info_t *rdip,
218 			    ddi_dma_handle_t handle, off_t off,
219 			    size_t len, uint_t cache_flags);
220 	int		(*bus_dma_win)(dev_info_t *dip, dev_info_t *rdip,
221 			    ddi_dma_handle_t handle, uint_t win, off_t *offp,
222 			    size_t *lenp, ddi_dma_cookie_t *cookiep,
223 			    uint_t *ccountp);
224 	int		(*bus_dma_ctl)(dev_info_t *dip, dev_info_t *rdip,
225 			    ddi_dma_handle_t handle,
226 			    enum ddi_dma_ctlops request, off_t *offp,
227 			    size_t *lenp, caddr_t *objp, uint_t flags);
228 	int		(*bus_ctl)(dev_info_t *dip, dev_info_t *rdip,
229 			    ddi_ctl_enum_t ctlop, void *arg, void *result);
230 	int		(*bus_prop_op)(dev_t dev, dev_info_t *dip,
231 			    dev_info_t *child_dip, ddi_prop_op_t prop_op,
232 			    int mod_flags, char *name, caddr_t valuep,
233 			    int *length);
234 	/*
235 	 * NOTE: the following 4 busops entrypoints are only available
236 	 * with version 3 or greater.  Due to interface modifications, these
237 	 * entrypoints can only be used with version 6 or greater.
238 	 */
239 
240 	int		(*bus_get_eventcookie)(dev_info_t *dip,
241 			    dev_info_t *rdip, char *eventname,
242 			    ddi_eventcookie_t *cookiep);
243 	int		(*bus_add_eventcall)(dev_info_t *dip, dev_info_t *rdip,
244 			    ddi_eventcookie_t eventid,
245 			    void (*event_hdlr)(dev_info_t *dip,
246 			    ddi_eventcookie_t event, void *arg,
247 			    void *bus_impldata), void *arg,
248 			    ddi_callback_id_t *cb_id);
249 	int		(*bus_remove_eventcall)(dev_info_t *devi,
250 			    ddi_callback_id_t cb_id);
251 	int		(*bus_post_event)(dev_info_t *dip, dev_info_t *rdip,
252 			    ddi_eventcookie_t event, void *impl_data);
253 
254 	/*
255 	 * NOTE: the following bus_intr_ctl entrypoint is obsoleted with
256 	 * version 9 or greater. Use bus_intr_op interface in place of
257 	 * this obsolete interface.
258 	 */
259 	int		(*bus_intr_ctl)(dev_info_t *dip, dev_info_t *rdip,
260 			    ddi_intr_ctlop_t ctlop, void * arg, void * result);
261 	/*
262 	 * NOTE: the following busop entrypoints are available with version
263 	 * 5 or greater.
264 	 */
265 	int		(*bus_config)(dev_info_t *parent, uint_t flags,
266 			    ddi_bus_config_op_t op, void *arg,
267 			    dev_info_t **childp);
268 	int		(*bus_unconfig)(dev_info_t *parent, uint_t flags,
269 			    ddi_bus_config_op_t op, void *arg);
270 
271 	/*
272 	 * NOTE: the following busop entrypoints are available with version
273 	 * 6 or greater.
274 	 */
275 	int		(*bus_fm_init)(dev_info_t *dip, dev_info_t *tdip,
276 			    int cap, ddi_iblock_cookie_t *ibc);
277 	void		(*bus_fm_fini)(dev_info_t *dip, dev_info_t *tdip);
278 	void		(*bus_fm_access_enter)(dev_info_t *dip,
279 			    ddi_acc_handle_t handle);
280 	void		(*bus_fm_access_exit)(dev_info_t *dip,
281 			    ddi_acc_handle_t handle);
282 
283 	/*
284 	 * NOTE: the following busop entrypoint is available with version
285 	 * 7 or greater.
286 	 */
287 	int		(*bus_power)(dev_info_t *dip, void *impl_arg,
288 			    pm_bus_power_op_t op, void *arg, void *result);
289 
290 	/*
291 	 * NOTE: the following busop entrypoint is available with version
292 	 * 9 or greater.
293 	 */
294 	int		(*bus_intr_op)(dev_info_t *dip, dev_info_t *rdip,
295 			    ddi_intr_op_t op, ddi_intr_handle_impl_t *hdlp,
296 			    void *result);
297 
298 	/*
299 	 * NOTE: the following busop entrypoint is available with version
300 	 * 10 or greater.
301 	 */
302 	int		(*bus_hp_op)(dev_info_t *dip, char *cn_name,
303 			    ddi_hp_op_t op, void *arg, void *result);
304 };
305 
306 /*
307  * REV 1 bus ops structure
308  */
309 
310 struct bus_ops_rev1 {
311 	int		(*bus_map)(dev_info_t *dip, dev_info_t *rdip,
312 			    ddi_map_req_t *mp, off_t offset, off_t len,
313 			    caddr_t *vaddrp);
314 	ddi_intrspec_t	(*bus_get_intrspec)(dev_info_t *dip, dev_info_t *rdip,
315 			    uint_t inumber);
316 	int		(*bus_add_intrspec)(dev_info_t *dip,
317 			    dev_info_t *rdip, ddi_intrspec_t intrspec,
318 			    ddi_iblock_cookie_t *ibcp,
319 			    ddi_idevice_cookie_t *idcp,
320 			    uint_t (*int_handler)(caddr_t intr_handler_arg),
321 			    caddr_t intr_handler_arg, int kind);
322 	void		(*bus_remove_intrspec)(dev_info_t *dip,
323 			    dev_info_t *rdip, ddi_intrspec_t intrspec,
324 			    ddi_iblock_cookie_t iblock_cookie);
325 	int		(*bus_map_fault)(dev_info_t *dip, dev_info_t *rdip,
326 			    struct hat *hat, struct seg *seg, caddr_t addr,
327 			    struct devpage *dp, pfn_t pfn, uint_t prot,
328 			    uint_t lock);
329 	int		(*bus_dma_map)(dev_info_t *dip, dev_info_t *rdip,
330 			    struct ddi_dma_req *dmareq,
331 			    ddi_dma_handle_t *handlep);
332 	int		(*bus_dma_ctl)(dev_info_t *dip, dev_info_t *rdip,
333 			    ddi_dma_handle_t handle,
334 			    enum ddi_dma_ctlops request, off_t *offp,
335 			    uint_t *lenp, caddr_t *objp, uint_t flags);
336 	int		(*bus_ctl)(dev_info_t *dip, dev_info_t *rdip,
337 			    ddi_ctl_enum_t ctlop, void *arg, void *result);
338 	int		(*bus_prop_op)(dev_t dev, dev_info_t *dip,
339 			    dev_info_t *child_dip, ddi_prop_op_t prop_op,
340 			    int mod_flags, char *name, caddr_t valuep,
341 			    int *length);
342 };
343 
344 /*
345  * dev_ops:	Contains driver common fields and pointers
346  *		to the bus_ops and/or cb_ops parts.
347  *
348  * Drivers should set devo_rev to DEVO_REV at compile time.
349  * All drivers should support these entry points.
350  *
351  * the following device functions are provided in the device operations
352  * structure.
353  *
354  *	devo_getinfo		-  Device handle conversion
355  *	devo_identify		-  Obsolete, set to nulldev
356  *	devo_probe		-  Probe for device's existence
357  *	devo_attach		-  Attach driver to dev_info
358  *	devo_detach		-  Detach/prepare driver to unload
359  *	devo_reset		-  Reset device
360  *	devo_quiesce		-  Quiesce device
361  */
362 
363 #define		DEVO_REV		4
364 #define		CB_REV			1
365 
366 /*
367  * Return from driver's devo_probe function:
368  */
369 
370 #define	DDI_PROBE_FAILURE	ENXIO	/* matches nodev return */
371 #define	DDI_PROBE_DONTCARE	0	/* matches nulldev return */
372 #define	DDI_PROBE_PARTIAL	1
373 #define	DDI_PROBE_SUCCESS	2
374 
375 /*
376  * Typedefs for the info, attach, detach and reset routines.
377  * These are mostly placeholders for now.
378  *
379  * NOTE: DDI_INFO_DEVT2DEVINFO is deprecated
380  */
381 typedef enum {
382 	DDI_INFO_DEVT2DEVINFO = 0,	/* Convert a dev_t to a dev_info_t */
383 	DDI_INFO_DEVT2INSTANCE = 1	/* Convert a dev_t to an instance # */
384 } ddi_info_cmd_t;
385 
386 typedef enum {
387 	DDI_ATTACH = 0,
388 	DDI_RESUME = 1,
389 	DDI_PM_RESUME = 2
390 } ddi_attach_cmd_t;
391 
392 typedef enum {
393 	DDI_DETACH = 0,
394 	DDI_SUSPEND = 1,
395 	DDI_PM_SUSPEND = 2,
396 	DDI_HOTPLUG_DETACH = 3		/* detach, don't try to auto-unconfig */
397 } ddi_detach_cmd_t;
398 
399 typedef enum {
400 	DDI_RESET_FORCE = 0
401 } ddi_reset_cmd_t;
402 
403 struct dev_ops  {
404 	int		devo_rev;	/* Driver build version		*/
405 	int		devo_refcnt;	/* device reference count	*/
406 
407 	int		(*devo_getinfo)(dev_info_t *dip,
408 			    ddi_info_cmd_t infocmd, void *arg, void **result);
409 	int		(*devo_identify)(dev_info_t *dip);
410 	int		(*devo_probe)(dev_info_t *dip);
411 	int		(*devo_attach)(dev_info_t *dip, ddi_attach_cmd_t cmd);
412 	int		(*devo_detach)(dev_info_t *dip, ddi_detach_cmd_t cmd);
413 	int		(*devo_reset)(dev_info_t *dip, ddi_reset_cmd_t cmd);
414 
415 	struct cb_ops	*devo_cb_ops;	/* cb_ops pointer for leaf drivers   */
416 	struct bus_ops	*devo_bus_ops;	/* bus_ops pointer for nexus drivers */
417 	int		(*devo_power)(dev_info_t *dip, int component,
418 			    int level);
419 	int		(*devo_quiesce)(dev_info_t *dip);
420 };
421 
422 /*
423  * Create a dev_ops suitable for a streams driver:
424  *
425  * XXX: Note:  Since this is a macro, it is NOT supported as
426  * XXX: part of the Sun DDI.  It is not a documented Sun DDI interface.
427  *
428  * STR_OPS(name, identify, probe, attach, detach, reset,
429  *	info, flag, stream_tab);
430  *
431  *	XXname is the name of the dev_ops structure.
432  *	XXidentify must be set to nulldev
433  *	XXprobe is the name of the probe routine, or nulldev
434  *	XXattach is the name of the attach routine
435  *	XXdetach is the name of the detach routine, or nodev
436  *	XXreset is the name of the reset routine, or nodev
437  *	XXinfo is the name of the info routine
438  *	XXflag is driver flag (cb_flag) in cb_ops,
439  *	XXstream_tab is the obvious.
440  *	XXquiesce is the name of the quiesce routine. It must be implemented
441  *		for fast reboot to succeed.
442  *	cb_##XXname is the name of the internally defined cb_ops struct.
443  *
444  * uses cb_XXname as name of static cb_ops structure.
445  */
446 
447 /*
448  * This file is included by genassym.c now and I couldn't get it to take the
449  * next line if it was broken into two lines joined by a '\'.  So, don't try
450  * to reformat it to satisfy Cstyle because genassym.c won't compile.
451  */
452 /* CSTYLED */
453 #define	DDI_DEFINE_STREAM_OPS(XXname, XXidentify, XXprobe, XXattach, XXdetach, XXreset, XXgetinfo, XXflag, XXstream_tab, XXquiesce) \
454 static struct cb_ops cb_##XXname = {					\
455 	nulldev,		/* cb_open */				\
456 	nulldev,		/* cb_close */				\
457 	nodev,			/* cb_strategy */			\
458 	nodev,			/* cb_print */				\
459 	nodev,			/* cb_dump */				\
460 	nodev,			/* cb_read */				\
461 	nodev,			/* cb_write */				\
462 	nodev,			/* cb_ioctl */				\
463 	nodev,			/* cb_devmap */				\
464 	nodev,			/* cb_mmap */				\
465 	nodev,			/* cb_segmap */				\
466 	nochpoll,		/* cb_chpoll */				\
467 	ddi_prop_op,		/* cb_prop_op */			\
468 	(XXstream_tab),		/* cb_stream */				\
469 	(int)(XXflag),		/* cb_flag */				\
470 	CB_REV,			/* cb_rev */				\
471 	nodev,			/* cb_aread */				\
472 	nodev,			/* cb_awrite */				\
473 };									\
474 									\
475 static struct dev_ops XXname = {					\
476 	DEVO_REV,		/* devo_rev */				\
477 	0,			/* devo_refcnt */			\
478 	(XXgetinfo),		/* devo_getinfo */			\
479 	(XXidentify),		/* devo_identify */			\
480 	(XXprobe),		/* devo_probe */			\
481 	(XXattach),		/* devo_attach */			\
482 	(XXdetach),		/* devo_detach */			\
483 	(XXreset),		/* devo_reset */			\
484 	&(cb_##XXname),		/* devo_cb_ops */			\
485 	(struct bus_ops *)NULL,	/* devo_bus_ops */			\
486 	NULL,			/* devo_power */			\
487 	(XXquiesce)		/* devo_quiesce */			\
488 }
489 
490 #endif	/* _KERNEL */
491 
492 #ifdef	__cplusplus
493 }
494 #endif
495 
496 #endif	/* _SYS_DEVOPS_H */
497