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altera_avgen_fdt.c (245375) altera_avgen_fdt.c (245376)
1/*-
1/*-
2 * Copyright (c) 2012 Robert N. M. Watson
2 * Copyright (c) 2012-2013 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions

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24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions

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24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/altera/avgen/altera_avgen_nexus.c 245375 2013-01-13 16:41:25Z rwatson $");
32__FBSDID("$FreeBSD: head/sys/dev/altera/avgen/altera_avgen_nexus.c 245376 2013-01-13 16:43:59Z rwatson $");
33
34#include <sys/param.h>
35#include <sys/bus.h>
36#include <sys/condvar.h>
37#include <sys/conf.h>
38#include <sys/kernel.h>
39#include <sys/lock.h>
40#include <sys/malloc.h>

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48#include <machine/bus.h>
49#include <machine/resource.h>
50#include <machine/vm.h>
51
52#include <vm/vm.h>
53
54#include <dev/altera/avgen/altera_avgen.h>
55
33
34#include <sys/param.h>
35#include <sys/bus.h>
36#include <sys/condvar.h>
37#include <sys/conf.h>
38#include <sys/kernel.h>
39#include <sys/lock.h>
40#include <sys/malloc.h>

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48#include <machine/bus.h>
49#include <machine/resource.h>
50#include <machine/vm.h>
51
52#include <vm/vm.h>
53
54#include <dev/altera/avgen/altera_avgen.h>
55
56/*
57 * Generic device driver for allowing read(), write(), and mmap() on
58 * memory-mapped, Avalon-attached devices. There is no actual dependence on
59 * Avalon, so conceivably this should just be soc_dev or similar, since many
60 * system-on-chip bus environments would work fine with the same code.
61 */
62
63static d_mmap_t altera_avgen_mmap;
64static d_read_t altera_avgen_read;
65static d_write_t altera_avgen_write;
66
67static struct cdevsw avg_cdevsw = {
68 .d_version = D_VERSION,
69 .d_mmap = altera_avgen_mmap,
70 .d_read = altera_avgen_read,
71 .d_write = altera_avgen_write,
72 .d_name = "altera_avgen",
73};
74
75static int
56static int
76altera_avgen_read(struct cdev *dev, struct uio *uio, int flag)
77{
78 struct altera_avgen_softc *sc;
79 u_long offset, size;
80#ifdef NOTYET
81 uint64_t v8;
82#endif
83 uint32_t v4;
84 uint16_t v2;
85 uint8_t v1;
86 u_int width;
87 int error;
88
89 sc = dev->si_drv1;
90 if ((sc->avg_flags & ALTERA_AVALON_FLAG_READ) == 0)
91 return (EACCES);
92 width = sc->avg_width;
93 if (uio->uio_offset < 0 || uio->uio_offset % width != 0 ||
94 uio->uio_resid % width != 0)
95 return (ENODEV);
96 size = rman_get_size(sc->avg_res);
97 if ((uio->uio_offset + uio->uio_resid < 0) ||
98 (uio->uio_offset + uio->uio_resid > size))
99 return (ENODEV);
100 while (uio->uio_resid > 0) {
101 offset = uio->uio_offset;
102 if (offset + width > size)
103 return (ENODEV);
104 switch (width) {
105 case 1:
106 v1 = bus_read_1(sc->avg_res, offset);
107 error = uiomove(&v1, sizeof(v1), uio);
108 break;
109
110 case 2:
111 v2 = bus_read_2(sc->avg_res, offset);
112 error = uiomove(&v2, sizeof(v2), uio);
113 break;
114
115 case 4:
116 v4 = bus_read_4(sc->avg_res, offset);
117 error = uiomove(&v4, sizeof(v4), uio);
118 break;
119
120#ifdef NOTYET
121 case 8:
122 v8 = bus_read_8(sc->avg_res, offset);
123 error = uiomove(&v8, sizeof(v8), uio);
124 break;
125
126#endif
127
128 default:
129 panic("%s: unexpected widthment %u", __func__, width);
130 }
131 if (error)
132 return (error);
133 }
134 return (0);
135}
136
137static int
138altera_avgen_write(struct cdev *dev, struct uio *uio, int flag)
139{
140 struct altera_avgen_softc *sc;
141 u_long offset, size;
142#ifdef NOTYET
143 uint64_t v8;
144#endif
145 uint32_t v4;
146 uint16_t v2;
147 uint8_t v1;
148 u_int width;
149 int error;
150
151 sc = dev->si_drv1;
152 if ((sc->avg_flags & ALTERA_AVALON_FLAG_WRITE) == 0)
153 return (EACCES);
154 width = sc->avg_width;
155 if (uio->uio_offset < 0 || uio->uio_offset % width != 0 ||
156 uio->uio_resid % width != 0)
157 return (ENODEV);
158 size = rman_get_size(sc->avg_res);
159 while (uio->uio_resid > 0) {
160 offset = uio->uio_offset;
161 if (offset + width > size)
162 return (ENODEV);
163 switch (width) {
164 case 1:
165 error = uiomove(&v1, sizeof(v1), uio);
166 if (error)
167 return (error);
168 bus_write_1(sc->avg_res, offset, v1);
169 break;
170
171 case 2:
172 error = uiomove(&v2, sizeof(v2), uio);
173 if (error)
174 return (error);
175 bus_write_2(sc->avg_res, offset, v2);
176 break;
177
178 case 4:
179 error = uiomove(&v4, sizeof(v4), uio);
180 if (error)
181 return (error);
182 bus_write_4(sc->avg_res, offset, v4);
183 break;
184
185#ifdef NOTYET
186 case 8:
187 error = uiomove(&v8, sizeof(v8), uio);
188 if (error)
189 return (error);
190 bus_write_8(sc->avg_res, offset, v8);
191 break;
192#endif
193
194 default:
195 panic("%s: unexpected width %u", __func__, width);
196 }
197 }
198 return (0);
199}
200
201static int
202altera_avgen_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
203 int nprot, vm_memattr_t *memattr)
204{
205 struct altera_avgen_softc *sc;
206
207 sc = dev->si_drv1;
208 if (nprot & VM_PROT_READ) {
209 if ((sc->avg_flags & ALTERA_AVALON_FLAG_MMAP_READ) == 0)
210 return (EACCES);
211 }
212 if (nprot & VM_PROT_WRITE) {
213 if ((sc->avg_flags & ALTERA_AVALON_FLAG_MMAP_WRITE) == 0)
214 return (EACCES);
215 }
216 if (nprot & VM_PROT_EXECUTE) {
217 if ((sc->avg_flags & ALTERA_AVALON_FLAG_MMAP_EXEC) == 0)
218 return (EACCES);
219 }
220 if (trunc_page(offset) == offset &&
221 rman_get_size(sc->avg_res) >= offset + PAGE_SIZE) {
222 *paddr = rman_get_start(sc->avg_res) + offset;
223 *memattr = VM_MEMATTR_UNCACHEABLE;
224 } else
225 return (ENODEV);
226 return (0);
227}
228
229static int
230altera_avgen_nexus_probe(device_t dev)
231{
232
233 device_set_desc(dev, "Generic Altera Avalon device attachment");
234 return (BUS_PROBE_DEFAULT);
235}
236
237static int
57altera_avgen_nexus_probe(device_t dev)
58{
59
60 device_set_desc(dev, "Generic Altera Avalon device attachment");
61 return (BUS_PROBE_DEFAULT);
62}
63
64static int
238altera_avgen_process_options(struct altera_avgen_softc *sc,
239 const char *str_fileio, const char *str_mmapio, const char *str_devname,
240 int devunit)
241{
242 const char *cp;
243 device_t dev = sc->avg_dev;
244
245 /*
246 * Check for valid combinations of options.
247 */
248 if (str_fileio == NULL && str_mmapio == NULL) {
249 device_printf(dev,
250 "at least one of %s or %s must be specified\n",
251 ALTERA_AVALON_STR_FILEIO, ALTERA_AVALON_STR_MMAPIO);
252 return (ENXIO);
253 }
254 if (str_devname == NULL && devunit != -1) {
255 device_printf(dev, "%s requires %s be specified\n",
256 ALTERA_AVALON_STR_DEVUNIT, ALTERA_AVALON_STR_DEVNAME);
257 return (ENXIO);
258 }
259
260 /*
261 * Extract, digest, and save values.
262 */
263 switch (sc->avg_width) {
264 case 1:
265 case 2:
266 case 4:
267#ifdef NOTYET
268 case 8:
269#endif
270 break;
271
272 default:
273 device_printf(dev, "%s unsupported value %u\n",
274 ALTERA_AVALON_STR_WIDTH, sc->avg_width);
275 return (ENXIO);
276 }
277 sc->avg_flags = 0;
278 if (str_fileio != NULL) {
279 for (cp = str_fileio; *cp != '\0'; cp++) {
280 switch (*cp) {
281 case ALTERA_AVALON_CHAR_READ:
282 sc->avg_flags |= ALTERA_AVALON_FLAG_READ;
283 break;
284
285 case ALTERA_AVALON_CHAR_WRITE:
286 sc->avg_flags |= ALTERA_AVALON_FLAG_WRITE;
287 break;
288
289 default:
290 device_printf(dev,
291 "invalid %s character %c\n",
292 ALTERA_AVALON_STR_FILEIO, *cp);
293 return (ENXIO);
294 }
295 }
296 }
297 if (str_mmapio != NULL) {
298 for (cp = str_mmapio; *cp != '\0'; cp++) {
299 switch (*cp) {
300 case ALTERA_AVALON_CHAR_READ:
301 sc->avg_flags |= ALTERA_AVALON_FLAG_MMAP_READ;
302 break;
303
304 case ALTERA_AVALON_CHAR_WRITE:
305 sc->avg_flags |=
306 ALTERA_AVALON_FLAG_MMAP_WRITE;
307 break;
308
309 case ALTERA_AVALON_CHAR_EXEC:
310 sc->avg_flags |= ALTERA_AVALON_FLAG_MMAP_EXEC;
311 break;
312
313 default:
314 device_printf(dev,
315 "invalid %s character %c\n",
316 ALTERA_AVALON_STR_MMAPIO, *cp);
317 return (ENXIO);
318 }
319 }
320 }
321 return (0);
322}
323
324static int
325altera_avgen_nexus_attach(device_t dev)
326{
327 struct altera_avgen_softc *sc;
328 const char *str_fileio, *str_mmapio;
329 const char *str_devname;
65altera_avgen_nexus_attach(device_t dev)
66{
67 struct altera_avgen_softc *sc;
68 const char *str_fileio, *str_mmapio;
69 const char *str_devname;
330 char devname[SPECNAMELEN + 1];
331 int devunit, error;
332
333 sc = device_get_softc(dev);
334 sc->avg_dev = dev;
335 sc->avg_unit = device_get_unit(dev);
336
337 /*
338 * Query non-standard hints to find out what operations are permitted

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352 (void)resource_string_value(device_get_name(dev),
353 device_get_unit(dev), ALTERA_AVALON_STR_FILEIO, &str_fileio);
354 (void)resource_string_value(device_get_name(dev),
355 device_get_unit(dev), ALTERA_AVALON_STR_MMAPIO, &str_mmapio);
356 (void)resource_string_value(device_get_name(dev),
357 device_get_unit(dev), ALTERA_AVALON_STR_DEVNAME, &str_devname);
358 (void)resource_int_value(device_get_name(dev), device_get_unit(dev),
359 ALTERA_AVALON_STR_DEVUNIT, &devunit);
70 int devunit, error;
71
72 sc = device_get_softc(dev);
73 sc->avg_dev = dev;
74 sc->avg_unit = device_get_unit(dev);
75
76 /*
77 * Query non-standard hints to find out what operations are permitted

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91 (void)resource_string_value(device_get_name(dev),
92 device_get_unit(dev), ALTERA_AVALON_STR_FILEIO, &str_fileio);
93 (void)resource_string_value(device_get_name(dev),
94 device_get_unit(dev), ALTERA_AVALON_STR_MMAPIO, &str_mmapio);
95 (void)resource_string_value(device_get_name(dev),
96 device_get_unit(dev), ALTERA_AVALON_STR_DEVNAME, &str_devname);
97 (void)resource_int_value(device_get_name(dev), device_get_unit(dev),
98 ALTERA_AVALON_STR_DEVUNIT, &devunit);
360 error = altera_avgen_process_options(sc, str_fileio, str_mmapio,
361 str_devname, devunit);
362 if (error)
363 return (error);
364
99
365 /* Select a device name. */
366 if (str_devname != NULL) {
367 if (devunit != -1)
368 (void)snprintf(devname, sizeof(devname), "%s%d",
369 str_devname, devunit);
370 else
371 (void)snprintf(devname, sizeof(devname), "%s",
372 str_devname);
373 } else
374 snprintf(devname, sizeof(devname), "%s%d", "avgen",
375 sc->avg_unit);
376
377 /* Memory allocation and checking. */
378 sc->avg_rid = 0;
379 sc->avg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
380 &sc->avg_rid, RF_ACTIVE);
381 if (sc->avg_res == NULL) {
382 device_printf(dev, "couldn't map memory\n");
383 return (ENXIO);
384 }
100 /* Memory allocation and checking. */
101 sc->avg_rid = 0;
102 sc->avg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
103 &sc->avg_rid, RF_ACTIVE);
104 if (sc->avg_res == NULL) {
105 device_printf(dev, "couldn't map memory\n");
106 return (ENXIO);
107 }
385 if (rman_get_size(sc->avg_res) >= PAGE_SIZE || str_mmapio != NULL) {
386 if (rman_get_size(sc->avg_res) % PAGE_SIZE != 0) {
387 device_printf(dev,
388 "memory region not even multiple of page size\n");
389 error = ENXIO;
390 goto error;
391 }
392 if (rman_get_start(sc->avg_res) % PAGE_SIZE != 0) {
393 device_printf(dev, "memory region not page-aligned\n");
394 error = ENXIO;
395 goto error;
396 }
397 }
398
399 /* Device node allocation. */
400 if (str_devname == NULL) {
401 str_devname = "altera_avgen%d";
402 devunit = sc->avg_unit;
403 }
404 if (devunit != -1)
405 sc->avg_cdev = make_dev(&avg_cdevsw, sc->avg_unit, UID_ROOT,
406 GID_WHEEL, S_IRUSR | S_IWUSR, str_devname, devunit);
407 else
408 sc->avg_cdev = make_dev(&avg_cdevsw, sc->avg_unit, UID_ROOT,
409 GID_WHEEL, S_IRUSR | S_IWUSR, str_devname);
410 if (sc->avg_cdev == NULL) {
411 device_printf(sc->avg_dev, "%s: make_dev failed\n", __func__);
412 error = ENXIO;
413 goto error;
414 }
415 /* XXXRW: Slight race between make_dev(9) and here. */
416 sc->avg_cdev->si_drv1 = sc;
417 return (0);
418
419error:
420 bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, sc->avg_res);
108 error = altera_avgen_attach(sc, str_fileio, str_mmapio, str_devname,
109 devunit);
110 if (error != 0)
111 bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid,
112 sc->avg_res);
421 return (error);
422}
423
424static int
425altera_avgen_nexus_detach(device_t dev)
426{
427 struct altera_avgen_softc *sc;
428
429 sc = device_get_softc(dev);
113 return (error);
114}
115
116static int
117altera_avgen_nexus_detach(device_t dev)
118{
119 struct altera_avgen_softc *sc;
120
121 sc = device_get_softc(dev);
430 destroy_dev(sc->avg_cdev);
122 altera_avgen_detach(sc);
431 bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, sc->avg_res);
432 return (0);
433}
434
435static device_method_t altera_avgen_nexus_methods[] = {
436 DEVMETHOD(device_probe, altera_avgen_nexus_probe),
437 DEVMETHOD(device_attach, altera_avgen_nexus_attach),
438 DEVMETHOD(device_detach, altera_avgen_nexus_detach),

--- 13 unchanged lines hidden --- 		123 bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, sc->avg_res);
124 return (0);
125}
126
127static device_method_t altera_avgen_nexus_methods[] = {
128 DEVMETHOD(device_probe, altera_avgen_nexus_probe),
129 DEVMETHOD(device_attach, altera_avgen_nexus_attach),
130 DEVMETHOD(device_detach, altera_avgen_nexus_detach),

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