FreeBSD/Linux Kernel Cross Reference
sys/arm/mv/mv_pci.c
1 /*-
2 * Copyright (c) 2008 MARVELL INTERNATIONAL LTD.
3 * Copyright (c) 2010 The FreeBSD Foundation
4 * All rights reserved.
5 *
6 * Developed by Semihalf.
7 *
8 * Portions of this software were developed by Semihalf
9 * under sponsorship from the FreeBSD Foundation.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of MARVELL nor the names of contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 /*
37 * Marvell integrated PCI/PCI-Express controller driver.
38 */
39
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
42
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/lock.h>
47 #include <sys/malloc.h>
48 #include <sys/module.h>
49 #include <sys/mutex.h>
50 #include <sys/queue.h>
51 #include <sys/bus.h>
52 #include <sys/rman.h>
53 #include <sys/endian.h>
54
55 #include <vm/vm.h>
56 #include <vm/pmap.h>
57
58 #include <dev/fdt/fdt_common.h>
59 #include <dev/ofw/ofw_bus.h>
60 #include <dev/ofw/ofw_bus_subr.h>
61 #include <dev/pci/pcivar.h>
62 #include <dev/pci/pcireg.h>
63 #include <dev/pci/pcib_private.h>
64
65 #include "ofw_bus_if.h"
66 #include "pcib_if.h"
67
68 #include <machine/resource.h>
69 #include <machine/bus.h>
70
71 #include <arm/mv/mvreg.h>
72 #include <arm/mv/mvvar.h>
73 #include <arm/mv/mvwin.h>
74
75 #define PCI_CFG_ENA (1 << 31)
76 #define PCI_CFG_BUS(bus) (((bus) & 0xff) << 16)
77 #define PCI_CFG_DEV(dev) (((dev) & 0x1f) << 11)
78 #define PCI_CFG_FUN(fun) (((fun) & 0x7) << 8)
79 #define PCI_CFG_PCIE_REG(reg) ((reg) & 0xfc)
80
81 #define PCI_REG_CFG_ADDR 0x0C78
82 #define PCI_REG_CFG_DATA 0x0C7C
83 #define PCI_REG_P2P_CONF 0x1D14
84
85 #define PCIE_REG_CFG_ADDR 0x18F8
86 #define PCIE_REG_CFG_DATA 0x18FC
87 #define PCIE_REG_CONTROL 0x1A00
88 #define PCIE_CTRL_LINK1X 0x00000001
89 #define PCIE_REG_STATUS 0x1A04
90 #define PCIE_REG_IRQ_MASK 0x1910
91
92 #define STATUS_LINK_DOWN 1
93 #define STATUS_BUS_OFFS 8
94 #define STATUS_BUS_MASK (0xFF << STATUS_BUS_OFFS)
95 #define STATUS_DEV_OFFS 16
96 #define STATUS_DEV_MASK (0x1F << STATUS_DEV_OFFS)
97
98 #define P2P_CONF_BUS_OFFS 16
99 #define P2P_CONF_BUS_MASK (0xFF << P2P_CONF_BUS_OFFS)
100 #define P2P_CONF_DEV_OFFS 24
101 #define P2P_CONF_DEV_MASK (0x1F << P2P_CONF_DEV_OFFS)
102
103 #define PCI_VENDORID_MRVL 0x11AB
104
105 struct mv_pcib_softc {
106 device_t sc_dev;
107
108 struct rman sc_mem_rman;
109 bus_addr_t sc_mem_base;
110 bus_addr_t sc_mem_size;
111 bus_addr_t sc_mem_alloc; /* Next allocation. */
112 int sc_mem_win_target;
113 int sc_mem_win_attr;
114
115 struct rman sc_io_rman;
116 bus_addr_t sc_io_base;
117 bus_addr_t sc_io_size;
118 bus_addr_t sc_io_alloc; /* Next allocation. */
119 int sc_io_win_target;
120 int sc_io_win_attr;
121
122 struct resource *sc_res;
123 bus_space_handle_t sc_bsh;
124 bus_space_tag_t sc_bst;
125 int sc_rid;
126
127 int sc_busnr; /* Host bridge bus number */
128 int sc_devnr; /* Host bridge device number */
129 int sc_type;
130
131 struct fdt_pci_intr sc_intr_info;
132 };
133
134 /* Local forward prototypes */
135 static int mv_pcib_decode_win(phandle_t, struct mv_pcib_softc *);
136 static void mv_pcib_hw_cfginit(void);
137 static uint32_t mv_pcib_hw_cfgread(struct mv_pcib_softc *, u_int, u_int,
138 u_int, u_int, int);
139 static void mv_pcib_hw_cfgwrite(struct mv_pcib_softc *, u_int, u_int,
140 u_int, u_int, uint32_t, int);
141 static int mv_pcib_init(struct mv_pcib_softc *, int, int);
142 static int mv_pcib_init_all_bars(struct mv_pcib_softc *, int, int, int, int);
143 static void mv_pcib_init_bridge(struct mv_pcib_softc *, int, int, int);
144 static int mv_pcib_intr_info(phandle_t, struct mv_pcib_softc *);
145 static inline void pcib_write_irq_mask(struct mv_pcib_softc *, uint32_t);
146
147
148 /* Forward prototypes */
149 static int mv_pcib_probe(device_t);
150 static int mv_pcib_attach(device_t);
151
152 static struct resource *mv_pcib_alloc_resource(device_t, device_t, int, int *,
153 u_long, u_long, u_long, u_int);
154 static int mv_pcib_release_resource(device_t, device_t, int, int,
155 struct resource *);
156 static int mv_pcib_read_ivar(device_t, device_t, int, uintptr_t *);
157 static int mv_pcib_write_ivar(device_t, device_t, int, uintptr_t);
158
159 static int mv_pcib_maxslots(device_t);
160 static uint32_t mv_pcib_read_config(device_t, u_int, u_int, u_int, u_int, int);
161 static void mv_pcib_write_config(device_t, u_int, u_int, u_int, u_int,
162 uint32_t, int);
163 static int mv_pcib_route_interrupt(device_t, device_t, int);
164
165 /*
166 * Bus interface definitions.
167 */
168 static device_method_t mv_pcib_methods[] = {
169 /* Device interface */
170 DEVMETHOD(device_probe, mv_pcib_probe),
171 DEVMETHOD(device_attach, mv_pcib_attach),
172
173 /* Bus interface */
174 DEVMETHOD(bus_read_ivar, mv_pcib_read_ivar),
175 DEVMETHOD(bus_write_ivar, mv_pcib_write_ivar),
176 DEVMETHOD(bus_alloc_resource, mv_pcib_alloc_resource),
177 DEVMETHOD(bus_release_resource, mv_pcib_release_resource),
178 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
179 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
180 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
181 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
182
183 /* pcib interface */
184 DEVMETHOD(pcib_maxslots, mv_pcib_maxslots),
185 DEVMETHOD(pcib_read_config, mv_pcib_read_config),
186 DEVMETHOD(pcib_write_config, mv_pcib_write_config),
187 DEVMETHOD(pcib_route_interrupt, mv_pcib_route_interrupt),
188
189 /* OFW bus interface */
190 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
191 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
192 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
193 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
194 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
195
196 DEVMETHOD_END
197 };
198
199 static driver_t mv_pcib_driver = {
200 "pcib",
201 mv_pcib_methods,
202 sizeof(struct mv_pcib_softc),
203 };
204
205 devclass_t pcib_devclass;
206
207 DRIVER_MODULE(pcib, fdtbus, mv_pcib_driver, pcib_devclass, 0, 0);
208
209 static struct mtx pcicfg_mtx;
210
211 static int
212 mv_pcib_probe(device_t self)
213 {
214 phandle_t node;
215
216 node = ofw_bus_get_node(self);
217 if (!fdt_is_type(node, "pci"))
218 return (ENXIO);
219
220 if (!(fdt_is_compatible(node, "mrvl,pcie") ||
221 fdt_is_compatible(node, "mrvl,pci")))
222 return (ENXIO);
223
224 device_set_desc(self, "Marvell Integrated PCI/PCI-E Controller");
225 return (BUS_PROBE_DEFAULT);
226 }
227
228 static int
229 mv_pcib_attach(device_t self)
230 {
231 struct mv_pcib_softc *sc;
232 phandle_t node, parnode;
233 uint32_t val;
234 int err;
235
236 sc = device_get_softc(self);
237 sc->sc_dev = self;
238
239 node = ofw_bus_get_node(self);
240 parnode = OF_parent(node);
241 if (fdt_is_compatible(node, "mrvl,pcie")) {
242 sc->sc_type = MV_TYPE_PCIE;
243 sc->sc_mem_win_target = MV_WIN_PCIE_MEM_TARGET;
244 sc->sc_mem_win_attr = MV_WIN_PCIE_MEM_ATTR;
245 sc->sc_io_win_target = MV_WIN_PCIE_IO_TARGET;
246 sc->sc_io_win_attr = MV_WIN_PCIE_IO_ATTR;
247 #ifdef SOC_MV_ORION
248 } else if (fdt_is_compatible(node, "mrvl,pci")) {
249 sc->sc_type = MV_TYPE_PCI;
250 sc->sc_mem_win_target = MV_WIN_PCI_MEM_TARGET;
251 sc->sc_mem_win_attr = MV_WIN_PCI_MEM_ATTR;
252 sc->sc_io_win_target = MV_WIN_PCI_IO_TARGET;
253 sc->sc_io_win_attr = MV_WIN_PCI_IO_ATTR;
254 #endif
255 } else
256 return (ENXIO);
257
258 /*
259 * Get PCI interrupt info.
260 */
261 if (mv_pcib_intr_info(node, sc) != 0) {
262 device_printf(self, "could not retrieve interrupt info\n");
263 return (ENXIO);
264 }
265
266 /*
267 * Retrieve our mem-mapped registers range.
268 */
269 sc->sc_rid = 0;
270 sc->sc_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &sc->sc_rid,
271 RF_ACTIVE);
272 if (sc->sc_res == NULL) {
273 device_printf(self, "could not map memory\n");
274 return (ENXIO);
275 }
276 sc->sc_bst = rman_get_bustag(sc->sc_res);
277 sc->sc_bsh = rman_get_bushandle(sc->sc_res);
278
279 /*
280 * Configure decode windows for PCI(E) access.
281 */
282 if (mv_pcib_decode_win(node, sc) != 0)
283 return (ENXIO);
284
285 mv_pcib_hw_cfginit();
286
287 /*
288 * Enable PCI bridge.
289 */
290 val = mv_pcib_hw_cfgread(sc, sc->sc_busnr, sc->sc_devnr, 0,
291 PCIR_COMMAND, 2);
292 val |= PCIM_CMD_SERRESPEN | PCIM_CMD_BUSMASTEREN | PCIM_CMD_MEMEN |
293 PCIM_CMD_PORTEN;
294 mv_pcib_hw_cfgwrite(sc, sc->sc_busnr, sc->sc_devnr, 0,
295 PCIR_COMMAND, val, 2);
296
297 sc->sc_mem_alloc = sc->sc_mem_base;
298 sc->sc_io_alloc = sc->sc_io_base;
299
300 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
301 err = rman_init(&sc->sc_mem_rman);
302 if (err)
303 return (err);
304
305 sc->sc_io_rman.rm_type = RMAN_ARRAY;
306 err = rman_init(&sc->sc_io_rman);
307 if (err) {
308 rman_fini(&sc->sc_mem_rman);
309 return (err);
310 }
311
312 err = rman_manage_region(&sc->sc_mem_rman, sc->sc_mem_base,
313 sc->sc_mem_base + sc->sc_mem_size - 1);
314 if (err)
315 goto error;
316
317 err = rman_manage_region(&sc->sc_io_rman, sc->sc_io_base,
318 sc->sc_io_base + sc->sc_io_size - 1);
319 if (err)
320 goto error;
321
322 err = mv_pcib_init(sc, sc->sc_busnr, mv_pcib_maxslots(sc->sc_dev));
323 if (err)
324 goto error;
325
326 device_add_child(self, "pci", -1);
327 return (bus_generic_attach(self));
328
329 error:
330 /* XXX SYS_RES_ should be released here */
331 rman_fini(&sc->sc_mem_rman);
332 rman_fini(&sc->sc_io_rman);
333 return (err);
334 }
335
336 static int
337 mv_pcib_init_bar(struct mv_pcib_softc *sc, int bus, int slot, int func,
338 int barno)
339 {
340 bus_addr_t *allocp, limit;
341 uint32_t addr, bar, mask, size;
342 int reg, width;
343
344 reg = PCIR_BAR(barno);
345 bar = mv_pcib_read_config(sc->sc_dev, bus, slot, func, reg, 4);
346 if (bar == 0)
347 return (1);
348
349 /* Calculate BAR size: 64 or 32 bit (in 32-bit units) */
350 width = ((bar & 7) == 4) ? 2 : 1;
351
352 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg, ~0, 4);
353 size = mv_pcib_read_config(sc->sc_dev, bus, slot, func, reg, 4);
354
355 /* Get BAR type and size */
356 if (bar & 1) {
357 /* I/O port */
358 allocp = &sc->sc_io_alloc;
359 limit = sc->sc_io_base + sc->sc_io_size;
360 size &= ~0x3;
361 if ((size & 0xffff0000) == 0)
362 size |= 0xffff0000;
363 } else {
364 /* Memory */
365 allocp = &sc->sc_mem_alloc;
366 limit = sc->sc_mem_base + sc->sc_mem_size;
367 size &= ~0xF;
368 }
369 mask = ~size;
370 size = mask + 1;
371
372 /* Sanity check (must be a power of 2) */
373 if (size & mask)
374 return (width);
375
376 addr = (*allocp + mask) & ~mask;
377 if ((*allocp = addr + size) > limit)
378 return (-1);
379
380 if (bootverbose)
381 printf("PCI %u:%u:%u: reg %x: size=%08x: addr=%08x\n",
382 bus, slot, func, reg, size, addr);
383
384 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg, addr, 4);
385 if (width == 2)
386 mv_pcib_write_config(sc->sc_dev, bus, slot, func, reg + 4,
387 0, 4);
388
389 return (width);
390 }
391
392 static void
393 mv_pcib_init_bridge(struct mv_pcib_softc *sc, int bus, int slot, int func)
394 {
395 bus_addr_t io_base, mem_base;
396 uint32_t io_limit, mem_limit;
397 int secbus;
398
399 io_base = sc->sc_io_base;
400 io_limit = io_base + sc->sc_io_size - 1;
401 mem_base = sc->sc_mem_base;
402 mem_limit = mem_base + sc->sc_mem_size - 1;
403
404 /* Configure I/O decode registers */
405 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOBASEL_1,
406 io_base >> 8, 1);
407 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOBASEH_1,
408 io_base >> 16, 2);
409 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOLIMITL_1,
410 io_limit >> 8, 1);
411 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_IOLIMITH_1,
412 io_limit >> 16, 2);
413
414 /* Configure memory decode registers */
415 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_MEMBASE_1,
416 mem_base >> 16, 2);
417 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_MEMLIMIT_1,
418 mem_limit >> 16, 2);
419
420 /* Disable memory prefetch decode */
421 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMBASEL_1,
422 0x10, 2);
423 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMBASEH_1,
424 0x0, 4);
425 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMLIMITL_1,
426 0xF, 2);
427 mv_pcib_write_config(sc->sc_dev, bus, slot, func, PCIR_PMLIMITH_1,
428 0x0, 4);
429
430 secbus = mv_pcib_read_config(sc->sc_dev, bus, slot, func,
431 PCIR_SECBUS_1, 1);
432
433 /* Configure buses behind the bridge */
434 mv_pcib_init(sc, secbus, PCI_SLOTMAX);
435 }
436
437 static int
438 mv_pcib_init(struct mv_pcib_softc *sc, int bus, int maxslot)
439 {
440 int slot, func, maxfunc, error;
441 uint8_t hdrtype, command, class, subclass;
442
443 for (slot = 0; slot <= maxslot; slot++) {
444 maxfunc = 0;
445 for (func = 0; func <= maxfunc; func++) {
446 hdrtype = mv_pcib_read_config(sc->sc_dev, bus, slot,
447 func, PCIR_HDRTYPE, 1);
448
449 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
450 continue;
451
452 if (func == 0 && (hdrtype & PCIM_MFDEV))
453 maxfunc = PCI_FUNCMAX;
454
455 command = mv_pcib_read_config(sc->sc_dev, bus, slot,
456 func, PCIR_COMMAND, 1);
457 command &= ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN);
458 mv_pcib_write_config(sc->sc_dev, bus, slot, func,
459 PCIR_COMMAND, command, 1);
460
461 error = mv_pcib_init_all_bars(sc, bus, slot, func,
462 hdrtype);
463
464 if (error)
465 return (error);
466
467 command |= PCIM_CMD_BUSMASTEREN | PCIM_CMD_MEMEN |
468 PCIM_CMD_PORTEN;
469 mv_pcib_write_config(sc->sc_dev, bus, slot, func,
470 PCIR_COMMAND, command, 1);
471
472 /* Handle PCI-PCI bridges */
473 class = mv_pcib_read_config(sc->sc_dev, bus, slot,
474 func, PCIR_CLASS, 1);
475 subclass = mv_pcib_read_config(sc->sc_dev, bus, slot,
476 func, PCIR_SUBCLASS, 1);
477
478 if (class != PCIC_BRIDGE ||
479 subclass != PCIS_BRIDGE_PCI)
480 continue;
481
482 mv_pcib_init_bridge(sc, bus, slot, func);
483 }
484 }
485
486 /* Enable all ABCD interrupts */
487 pcib_write_irq_mask(sc, (0xF << 24));
488
489 return (0);
490 }
491
492 static int
493 mv_pcib_init_all_bars(struct mv_pcib_softc *sc, int bus, int slot,
494 int func, int hdrtype)
495 {
496 int maxbar, bar, i;
497
498 maxbar = (hdrtype & PCIM_HDRTYPE) ? 0 : 6;
499 bar = 0;
500
501 /* Program the base address registers */
502 while (bar < maxbar) {
503 i = mv_pcib_init_bar(sc, bus, slot, func, bar);
504 bar += i;
505 if (i < 0) {
506 device_printf(sc->sc_dev,
507 "PCI IO/Memory space exhausted\n");
508 return (ENOMEM);
509 }
510 }
511
512 return (0);
513 }
514
515 static struct resource *
516 mv_pcib_alloc_resource(device_t dev, device_t child, int type, int *rid,
517 u_long start, u_long end, u_long count, u_int flags)
518 {
519 struct mv_pcib_softc *sc = device_get_softc(dev);
520 struct rman *rm = NULL;
521 struct resource *res;
522
523 switch (type) {
524 case SYS_RES_IOPORT:
525 rm = &sc->sc_io_rman;
526 break;
527 case SYS_RES_MEMORY:
528 rm = &sc->sc_mem_rman;
529 break;
530 default:
531 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
532 type, rid, start, end, count, flags));
533 };
534
535 res = rman_reserve_resource(rm, start, end, count, flags, child);
536 if (res == NULL)
537 return (NULL);
538
539 rman_set_rid(res, *rid);
540 rman_set_bustag(res, fdtbus_bs_tag);
541 rman_set_bushandle(res, start);
542
543 if (flags & RF_ACTIVE)
544 if (bus_activate_resource(child, type, *rid, res)) {
545 rman_release_resource(res);
546 return (NULL);
547 }
548
549 return (res);
550 }
551
552 static int
553 mv_pcib_release_resource(device_t dev, device_t child, int type, int rid,
554 struct resource *res)
555 {
556
557 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY)
558 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child,
559 type, rid, res));
560
561 return (rman_release_resource(res));
562 }
563
564 static int
565 mv_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
566 {
567 struct mv_pcib_softc *sc = device_get_softc(dev);
568
569 switch (which) {
570 case PCIB_IVAR_BUS:
571 *result = sc->sc_busnr;
572 return (0);
573 case PCIB_IVAR_DOMAIN:
574 *result = device_get_unit(dev);
575 return (0);
576 }
577
578 return (ENOENT);
579 }
580
581 static int
582 mv_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
583 {
584 struct mv_pcib_softc *sc = device_get_softc(dev);
585
586 switch (which) {
587 case PCIB_IVAR_BUS:
588 sc->sc_busnr = value;
589 return (0);
590 }
591
592 return (ENOENT);
593 }
594
595 static inline void
596 pcib_write_irq_mask(struct mv_pcib_softc *sc, uint32_t mask)
597 {
598
599 if (!sc->sc_type != MV_TYPE_PCI)
600 return;
601
602 bus_space_write_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_IRQ_MASK, mask);
603 }
604
605 static void
606 mv_pcib_hw_cfginit(void)
607 {
608 static int opened = 0;
609
610 if (opened)
611 return;
612
613 mtx_init(&pcicfg_mtx, "pcicfg", NULL, MTX_SPIN);
614 opened = 1;
615 }
616
617 static uint32_t
618 mv_pcib_hw_cfgread(struct mv_pcib_softc *sc, u_int bus, u_int slot,
619 u_int func, u_int reg, int bytes)
620 {
621 uint32_t addr, data, ca, cd;
622
623 ca = (sc->sc_type != MV_TYPE_PCI) ?
624 PCIE_REG_CFG_ADDR : PCI_REG_CFG_ADDR;
625 cd = (sc->sc_type != MV_TYPE_PCI) ?
626 PCIE_REG_CFG_DATA : PCI_REG_CFG_DATA;
627 addr = PCI_CFG_ENA | PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) |
628 PCI_CFG_FUN(func) | PCI_CFG_PCIE_REG(reg);
629
630 mtx_lock_spin(&pcicfg_mtx);
631 bus_space_write_4(sc->sc_bst, sc->sc_bsh, ca, addr);
632
633 data = ~0;
634 switch (bytes) {
635 case 1:
636 data = bus_space_read_1(sc->sc_bst, sc->sc_bsh,
637 cd + (reg & 3));
638 break;
639 case 2:
640 data = le16toh(bus_space_read_2(sc->sc_bst, sc->sc_bsh,
641 cd + (reg & 2)));
642 break;
643 case 4:
644 data = le32toh(bus_space_read_4(sc->sc_bst, sc->sc_bsh,
645 cd));
646 break;
647 }
648 mtx_unlock_spin(&pcicfg_mtx);
649 return (data);
650 }
651
652 static void
653 mv_pcib_hw_cfgwrite(struct mv_pcib_softc *sc, u_int bus, u_int slot,
654 u_int func, u_int reg, uint32_t data, int bytes)
655 {
656 uint32_t addr, ca, cd;
657
658 ca = (sc->sc_type != MV_TYPE_PCI) ?
659 PCIE_REG_CFG_ADDR : PCI_REG_CFG_ADDR;
660 cd = (sc->sc_type != MV_TYPE_PCI) ?
661 PCIE_REG_CFG_DATA : PCI_REG_CFG_DATA;
662 addr = PCI_CFG_ENA | PCI_CFG_BUS(bus) | PCI_CFG_DEV(slot) |
663 PCI_CFG_FUN(func) | PCI_CFG_PCIE_REG(reg);
664
665 mtx_lock_spin(&pcicfg_mtx);
666 bus_space_write_4(sc->sc_bst, sc->sc_bsh, ca, addr);
667
668 switch (bytes) {
669 case 1:
670 bus_space_write_1(sc->sc_bst, sc->sc_bsh,
671 cd + (reg & 3), data);
672 break;
673 case 2:
674 bus_space_write_2(sc->sc_bst, sc->sc_bsh,
675 cd + (reg & 2), htole16(data));
676 break;
677 case 4:
678 bus_space_write_4(sc->sc_bst, sc->sc_bsh,
679 cd, htole32(data));
680 break;
681 }
682 mtx_unlock_spin(&pcicfg_mtx);
683 }
684
685 static int
686 mv_pcib_maxslots(device_t dev)
687 {
688 struct mv_pcib_softc *sc = device_get_softc(dev);
689
690 return ((sc->sc_type != MV_TYPE_PCI) ? 1 : PCI_SLOTMAX);
691 }
692
693 static uint32_t
694 mv_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
695 u_int reg, int bytes)
696 {
697 struct mv_pcib_softc *sc = device_get_softc(dev);
698
699 /* Skip self */
700 if (bus == sc->sc_busnr && slot == sc->sc_devnr)
701 return (~0U);
702
703 return (mv_pcib_hw_cfgread(sc, bus, slot, func, reg, bytes));
704 }
705
706 static void
707 mv_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
708 u_int reg, uint32_t val, int bytes)
709 {
710 struct mv_pcib_softc *sc = device_get_softc(dev);
711
712 /* Skip self */
713 if (bus == sc->sc_busnr && slot == sc->sc_devnr)
714 return;
715
716 mv_pcib_hw_cfgwrite(sc, bus, slot, func, reg, val, bytes);
717 }
718
719 static int
720 mv_pcib_route_interrupt(device_t pcib, device_t dev, int pin)
721 {
722 struct mv_pcib_softc *sc;
723 int err, interrupt;
724
725 sc = device_get_softc(pcib);
726
727 err = fdt_pci_route_intr(pci_get_bus(dev), pci_get_slot(dev),
728 pci_get_function(dev), pin, &sc->sc_intr_info, &interrupt);
729 if (err == 0)
730 return (interrupt);
731
732 device_printf(pcib, "could not route pin %d for device %d.%d\n",
733 pin, pci_get_slot(dev), pci_get_function(dev));
734 return (PCI_INVALID_IRQ);
735 }
736
737 static int
738 mv_pcib_decode_win(phandle_t node, struct mv_pcib_softc *sc)
739 {
740 struct fdt_pci_range io_space, mem_space;
741 device_t dev;
742 int error;
743
744 dev = sc->sc_dev;
745
746 if ((error = fdt_pci_ranges(node, &io_space, &mem_space)) != 0) {
747 device_printf(dev, "could not retrieve 'ranges' data\n");
748 return (error);
749 }
750
751 /* Configure CPU decoding windows */
752 error = decode_win_cpu_set(sc->sc_io_win_target,
753 sc->sc_io_win_attr, io_space.base_parent, io_space.len, -1);
754 if (error < 0) {
755 device_printf(dev, "could not set up CPU decode "
756 "window for PCI IO\n");
757 return (ENXIO);
758 }
759 error = decode_win_cpu_set(sc->sc_mem_win_target,
760 sc->sc_mem_win_attr, mem_space.base_parent, mem_space.len, -1);
761 if (error < 0) {
762 device_printf(dev, "could not set up CPU decode "
763 "windows for PCI MEM\n");
764 return (ENXIO);
765 }
766
767 sc->sc_io_base = io_space.base_parent;
768 sc->sc_io_size = io_space.len;
769
770 sc->sc_mem_base = mem_space.base_parent;
771 sc->sc_mem_size = mem_space.len;
772
773 return (0);
774 }
775
776 static int
777 mv_pcib_intr_info(phandle_t node, struct mv_pcib_softc *sc)
778 {
779 int error;
780
781 if ((error = fdt_pci_intr_info(node, &sc->sc_intr_info)) != 0)
782 return (error);
783
784 return (0);
785 }
786
787 #if 0
788 control = bus_space_read_4(sc->sc_bst, sc->sc_bsh,
789 PCIE_REG_CONTROL);
790
791 /*
792 * If this PCI-E port (controller) is configured (by the
793 * underlying firmware) with lane width other than 1x, there
794 * are auxiliary resources defined for aggregating more width
795 * on our lane. Skip all such entries as they are not
796 * standalone ports and must not have a device object
797 * instantiated.
798 */
799 if ((control & PCIE_CTRL_LINK1X) == 0)
800 while (info->op_base &&
801 info->op_type == MV_TYPE_PCIE_AGGR_LANE)
802 info++;
803
804 mv_pcib_add_child(driver, parent, sc);
805 #endif
Cache object: c05f0ea9cfb36bc9981c0fcee196cfcc
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