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506 suspend/resume issue on b147 (6986810)
[illumos-gate.git] / usr / src / uts / common / os / sunpci.c
blobb26685d941218dfe5e1c56b1190949708668f50a
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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #include <sys/types.h>
26 #include <sys/sunndi.h>
27 #include <sys/sysmacros.h>
28 #include <sys/pci.h>
29 #include <sys/pcie.h>
30 #include <sys/pci_impl.h>
31 #include <sys/epm.h>
32
33 int pci_enable_wakeup = 1;
34
35 int
36 pci_config_setup(dev_info_t *dip, ddi_acc_handle_t *handle)
37 {
38 caddr_t cfgaddr;
39 ddi_device_acc_attr_t attr;
40
41 attr.devacc_attr_version = DDI_DEVICE_ATTR_V0;
42 attr.devacc_attr_endian_flags = DDI_STRUCTURE_LE_ACC;
43 attr.devacc_attr_dataorder = DDI_STRICTORDER_ACC;
44
45 /* Check for fault management capabilities */
46 if (DDI_FM_ACC_ERR_CAP(ddi_fm_capable(dip))) {
47 attr.devacc_attr_version = DDI_DEVICE_ATTR_V1;
48 attr.devacc_attr_access = DDI_FLAGERR_ACC;
49 }
50
51 return (ddi_regs_map_setup(dip, 0, &cfgaddr, 0, 0, &attr, handle));
52 }
53
54 void
55 pci_config_teardown(ddi_acc_handle_t *handle)
56 {
57 ddi_regs_map_free(handle);
58 }
59
60 uint8_t
61 pci_config_get8(ddi_acc_handle_t handle, off_t offset)
62 {
63 caddr_t cfgaddr;
64 ddi_acc_hdl_t *hp;
65
66 hp = impl_acc_hdl_get(handle);
67 cfgaddr = hp->ah_addr + offset;
68 return (ddi_get8(handle, (uint8_t *)cfgaddr));
69 }
70
71 uint16_t
72 pci_config_get16(ddi_acc_handle_t handle, off_t offset)
73 {
74 caddr_t cfgaddr;
75 ddi_acc_hdl_t *hp;
76
77 hp = impl_acc_hdl_get(handle);
78 cfgaddr = hp->ah_addr + offset;
79 return (ddi_get16(handle, (uint16_t *)cfgaddr));
80 }
81
82 uint32_t
83 pci_config_get32(ddi_acc_handle_t handle, off_t offset)
84 {
85 caddr_t cfgaddr;
86 ddi_acc_hdl_t *hp;
87
88 hp = impl_acc_hdl_get(handle);
89 cfgaddr = hp->ah_addr + offset;
90 return (ddi_get32(handle, (uint32_t *)cfgaddr));
91 }
92
93 uint64_t
94 pci_config_get64(ddi_acc_handle_t handle, off_t offset)
95 {
96 caddr_t cfgaddr;
97 ddi_acc_hdl_t *hp;
98
99 hp = impl_acc_hdl_get(handle);
100 cfgaddr = hp->ah_addr + offset;
101 return (ddi_get64(handle, (uint64_t *)cfgaddr));
102 }
103
104 void
105 pci_config_put8(ddi_acc_handle_t handle, off_t offset, uint8_t value)
106 {
107 caddr_t cfgaddr;
108 ddi_acc_hdl_t *hp;
109
110 hp = impl_acc_hdl_get(handle);
111 cfgaddr = hp->ah_addr + offset;
112 ddi_put8(handle, (uint8_t *)cfgaddr, value);
113 }
114
115 void
116 pci_config_put16(ddi_acc_handle_t handle, off_t offset, uint16_t value)
117 {
118 caddr_t cfgaddr;
119 ddi_acc_hdl_t *hp;
120
121 hp = impl_acc_hdl_get(handle);
122 cfgaddr = hp->ah_addr + offset;
123 ddi_put16(handle, (uint16_t *)cfgaddr, value);
124 }
125
126 void
127 pci_config_put32(ddi_acc_handle_t handle, off_t offset, uint32_t value)
128 {
129 caddr_t cfgaddr;
130 ddi_acc_hdl_t *hp;
131
132 hp = impl_acc_hdl_get(handle);
133 cfgaddr = hp->ah_addr + offset;
134 ddi_put32(handle, (uint32_t *)cfgaddr, value);
135 }
136
137 void
138 pci_config_put64(ddi_acc_handle_t handle, off_t offset, uint64_t value)
139 {
140 caddr_t cfgaddr;
141 ddi_acc_hdl_t *hp;
142
143 hp = impl_acc_hdl_get(handle);
144 cfgaddr = hp->ah_addr + offset;
145 ddi_put64(handle, (uint64_t *)cfgaddr, value);
146 }
147
148 /*
149 * We need to separate the old interfaces from the new ones and leave them
150 * in here for a while. Previous versions of the OS defined the new interfaces
151 * to the old interfaces. This way we can fix things up so that we can
152 * eventually remove these interfaces.
153 * e.g. A 3rd party module/driver using pci_config_get8 and built against S10
154 * or earlier will actually have a reference to pci_config_getb in the binary.
155 */
156 #ifdef _ILP32
157 uint8_t
158 pci_config_getb(ddi_acc_handle_t handle, off_t offset)
159 {
160 caddr_t cfgaddr;
161 ddi_acc_hdl_t *hp;
162
163 hp = impl_acc_hdl_get(handle);
164 cfgaddr = hp->ah_addr + offset;
165 return (ddi_get8(handle, (uint8_t *)cfgaddr));
166 }
167
168 uint16_t
169 pci_config_getw(ddi_acc_handle_t handle, off_t offset)
170 {
171 caddr_t cfgaddr;
172 ddi_acc_hdl_t *hp;
173
174 hp = impl_acc_hdl_get(handle);
175 cfgaddr = hp->ah_addr + offset;
176 return (ddi_get16(handle, (uint16_t *)cfgaddr));
177 }
178
179 uint32_t
180 pci_config_getl(ddi_acc_handle_t handle, off_t offset)
181 {
182 caddr_t cfgaddr;
183 ddi_acc_hdl_t *hp;
184
185 hp = impl_acc_hdl_get(handle);
186 cfgaddr = hp->ah_addr + offset;
187 return (ddi_get32(handle, (uint32_t *)cfgaddr));
188 }
189
190 uint64_t
191 pci_config_getll(ddi_acc_handle_t handle, off_t offset)
192 {
193 caddr_t cfgaddr;
194 ddi_acc_hdl_t *hp;
195
196 hp = impl_acc_hdl_get(handle);
197 cfgaddr = hp->ah_addr + offset;
198 return (ddi_get64(handle, (uint64_t *)cfgaddr));
199 }
200
201 void
202 pci_config_putb(ddi_acc_handle_t handle, off_t offset, uint8_t value)
203 {
204 caddr_t cfgaddr;
205 ddi_acc_hdl_t *hp;
206
207 hp = impl_acc_hdl_get(handle);
208 cfgaddr = hp->ah_addr + offset;
209 ddi_put8(handle, (uint8_t *)cfgaddr, value);
210 }
211
212 void
213 pci_config_putw(ddi_acc_handle_t handle, off_t offset, uint16_t value)
214 {
215 caddr_t cfgaddr;
216 ddi_acc_hdl_t *hp;
217
218 hp = impl_acc_hdl_get(handle);
219 cfgaddr = hp->ah_addr + offset;
220 ddi_put16(handle, (uint16_t *)cfgaddr, value);
221 }
222
223 void
224 pci_config_putl(ddi_acc_handle_t handle, off_t offset, uint32_t value)
225 {
226 caddr_t cfgaddr;
227 ddi_acc_hdl_t *hp;
228
229 hp = impl_acc_hdl_get(handle);
230 cfgaddr = hp->ah_addr + offset;
231 ddi_put32(handle, (uint32_t *)cfgaddr, value);
232 }
233
234 void
235 pci_config_putll(ddi_acc_handle_t handle, off_t offset, uint64_t value)
236 {
237 caddr_t cfgaddr;
238 ddi_acc_hdl_t *hp;
239
240 hp = impl_acc_hdl_get(handle);
241 cfgaddr = hp->ah_addr + offset;
242 ddi_put64(handle, (uint64_t *)cfgaddr, value);
243 }
244 #endif /* _ILP32 */
245
246 /*ARGSUSED*/
247 int
248 pci_report_pmcap(dev_info_t *dip, int cap, void *arg)
249 {
250 return (DDI_SUCCESS);
251 }
252
253 /*
254 * Note about saving and restoring config space.
255 * PCI devices have only upto 256 bytes of config space while PCI Express
256 * devices can have upto 4k config space. In case of PCI Express device,
257 * we save all 4k config space and restore it even if it doesn't make use
258 * of all 4k. But some devices don't respond to reads to non-existent
259 * registers within the config space. To avoid any panics, we use ddi_peek
260 * to do the reads. A bit mask is used to indicate which words of the
261 * config space are accessible. While restoring the config space, only those
262 * readable words are restored. We do all this in 32 bit size words.
263 */
264 #define INDEX_SHIFT 3
265 #define BITMASK 0x7
266
267 static uint32_t pci_save_caps(ddi_acc_handle_t confhdl, uint32_t *regbuf,
268 pci_cap_save_desc_t *cap_descp, uint32_t *ncapsp);
269 static void pci_restore_caps(ddi_acc_handle_t confhdl, uint32_t *regbuf,
270 pci_cap_save_desc_t *cap_descp, uint32_t elements);
271 static uint32_t pci_generic_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
272 uint32_t *regbuf, uint32_t nwords);
273 static uint32_t pci_msi_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
274 uint32_t *regbuf, uint32_t notused);
275 static uint32_t pci_pcix_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
276 uint32_t *regbuf, uint32_t notused);
277 static uint32_t pci_pcie_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
278 uint32_t *regbuf, uint32_t notused);
279 static uint32_t pci_ht_addrmap_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
280 uint32_t *regbuf, uint32_t notused);
281 static uint32_t pci_ht_funcext_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
282 uint32_t *regbuf, uint32_t notused);
283 static void pci_fill_buf(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
284 uint32_t *regbuf, uint32_t nwords);
285 static uint32_t cap_walk_and_save(ddi_acc_handle_t confhdl, uint32_t *regbuf,
286 pci_cap_save_desc_t *cap_descp, uint32_t *ncapsp, int xspace);
287 static void pci_pmcap_check(ddi_acc_handle_t confhdl, uint32_t *regbuf,
288 uint16_t pmcap_offset);
289
290 /*
291 * Table below specifies the number of registers to be saved for each PCI
292 * capability. pci_generic_save saves the number of words specified in the
293 * table. Any special considerations will be taken care by the capability
294 * specific save function e.g. use pci_msi_save to save registers associated
295 * with MSI capability. PCI_UNKNOWN_SIZE indicates that number of registers
296 * to be saved is variable and will be determined by the specific save function.
297 * Currently we save/restore all the registers associated with the capability
298 * including read only registers. Regsiters are saved and restored in 32 bit
299 * size words.
300 */
301 static pci_cap_entry_t pci_cap_table[] = {
302 {PCI_CAP_ID_PM, 0, 0, PCI_PMCAP_NDWORDS, pci_generic_save},
303 {PCI_CAP_ID_AGP, 0, 0, PCI_AGP_NDWORDS, pci_generic_save},
304 {PCI_CAP_ID_SLOT_ID, 0, 0, PCI_SLOTID_NDWORDS, pci_generic_save},
305 {PCI_CAP_ID_MSI_X, 0, 0, PCI_MSIX_NDWORDS, pci_generic_save},
306 {PCI_CAP_ID_MSI, 0, 0, PCI_CAP_SZUNKNOWN, pci_msi_save},
307 {PCI_CAP_ID_PCIX, 0, 0, PCI_CAP_SZUNKNOWN, pci_pcix_save},
308 {PCI_CAP_ID_PCI_E, 0, 0, PCI_CAP_SZUNKNOWN, pci_pcie_save},
309
310 {PCI_CAP_ID_HT, PCI_HTCAP_SLPRI_TYPE, PCI_HTCAP_TYPE_SLHOST_MASK,
311 PCI_HTCAP_SLPRI_NDWORDS, pci_generic_save},
312
313 {PCI_CAP_ID_HT, PCI_HTCAP_HOSTSEC_TYPE, PCI_HTCAP_TYPE_SLHOST_MASK,
314 PCI_HTCAP_HOSTSEC_NDWORDS, pci_generic_save},
315
316 {PCI_CAP_ID_HT, PCI_HTCAP_INTCONF_TYPE, PCI_HTCAP_TYPE_MASK,
317 PCI_HTCAP_INTCONF_NDWORDS, pci_generic_save},
318
319 {PCI_CAP_ID_HT, PCI_HTCAP_REVID_TYPE, PCI_HTCAP_TYPE_MASK,
320 PCI_HTCAP_REVID_NDWORDS, pci_generic_save},
321
322 {PCI_CAP_ID_HT, PCI_HTCAP_UNITID_CLUMP_TYPE, PCI_HTCAP_TYPE_MASK,
323 PCI_HTCAP_UNITID_CLUMP_NDWORDS, pci_generic_save},
324
325 {PCI_CAP_ID_HT, PCI_HTCAP_ECFG_TYPE, PCI_HTCAP_TYPE_MASK,
326 PCI_HTCAP_ECFG_NDWORDS, pci_generic_save},
327
328 {PCI_CAP_ID_HT, PCI_HTCAP_ADDRMAP_TYPE, PCI_HTCAP_TYPE_MASK,
329 PCI_CAP_SZUNKNOWN, pci_ht_addrmap_save},
330
331 {PCI_CAP_ID_HT, PCI_HTCAP_MSIMAP_TYPE, PCI_HTCAP_TYPE_MASK,
332 PCI_HTCAP_MSIMAP_NDWORDS, pci_generic_save},
333
334 {PCI_CAP_ID_HT, PCI_HTCAP_DIRROUTE_TYPE, PCI_HTCAP_TYPE_MASK,
335 PCI_HTCAP_DIRROUTE_NDWORDS, pci_generic_save},
336
337 {PCI_CAP_ID_HT, PCI_HTCAP_VCSET_TYPE, PCI_HTCAP_TYPE_MASK,
338 PCI_HTCAP_VCSET_NDWORDS, pci_generic_save},
339
340 {PCI_CAP_ID_HT, PCI_HTCAP_RETRYMODE_TYPE, PCI_HTCAP_TYPE_MASK,
341 PCI_HTCAP_RETRYMODE_NDWORDS, pci_generic_save},
342
343 {PCI_CAP_ID_HT, PCI_HTCAP_GEN3_TYPE, PCI_HTCAP_TYPE_MASK,
344 PCI_HTCAP_GEN3_NDWORDS, pci_generic_save},
345
346 {PCI_CAP_ID_HT, PCI_HTCAP_FUNCEXT_TYPE, PCI_HTCAP_TYPE_MASK,
347 PCI_CAP_SZUNKNOWN, pci_ht_funcext_save},
348
349 {PCI_CAP_ID_HT, PCI_HTCAP_PM_TYPE, PCI_HTCAP_TYPE_MASK,
350 PCI_HTCAP_PM_NDWORDS, pci_generic_save},
351
352 /*
353 * {PCI_CAP_ID_cPCI_CRC, 0, NULL},
354 * {PCI_CAP_ID_VPD, 0, NULL},
355 * {PCI_CAP_ID_cPCI_HS, 0, NULL},
356 * {PCI_CAP_ID_PCI_HOTPLUG, 0, NULL},
357 * {PCI_CAP_ID_AGP_8X, 0, NULL},
358 * {PCI_CAP_ID_SECURE_DEV, 0, NULL},
359 */
360 {PCI_CAP_NEXT_PTR_NULL, 0, NULL}
361 };
362
363
364 /*
365 * Save the configuration registers for cdip as a property
366 * so that it persists after detach/uninitchild.
367 */
368 int
369 pci_save_config_regs(dev_info_t *dip)
370 {
371 ddi_acc_handle_t confhdl;
372 pci_config_header_state_t *chsp;
373 pci_cap_save_desc_t *pci_cap_descp;
374 int ret;
375 uint32_t i, ncaps, nwords;
376 uint32_t *regbuf, *p;
377 uint8_t *maskbuf;
378 size_t maskbufsz, regbufsz, capbufsz;
379 #ifdef __sparc
380 ddi_acc_hdl_t *hp;
381 #else
382 ddi_device_acc_attr_t attr;
383 caddr_t cfgaddr;
384 #endif
385 off_t offset = 0;
386 uint8_t cap_ptr, cap_id;
387 int pcie = 0;
388 uint16_t status;
389
390 PMD(PMD_SX, ("pci_save_config_regs %s:%d\n", ddi_driver_name(dip),
391 ddi_get_instance(dip)))
392
393 #ifdef __sparc
394 if (pci_config_setup(dip, &confhdl) != DDI_SUCCESS) {
395 cmn_err(CE_WARN, "%s%d can't get config handle",
396 ddi_driver_name(dip), ddi_get_instance(dip));
397
398 return (DDI_FAILURE);
399 }
400 #else
401 /* Set up cautious config access handle */
402 attr.devacc_attr_version = DDI_DEVICE_ATTR_V1;
403 attr.devacc_attr_endian_flags = DDI_STRUCTURE_LE_ACC;
404 attr.devacc_attr_dataorder = DDI_STRICTORDER_ACC;
405 attr.devacc_attr_access = DDI_CAUTIOUS_ACC;
406 if (ddi_regs_map_setup(dip, 0, &cfgaddr, 0, 0, &attr, &confhdl)
407 != DDI_SUCCESS) {
408 cmn_err(CE_WARN, "%s%d can't setup cautious config handle",
409 ddi_driver_name(dip), ddi_get_instance(dip));
410
411 return (DDI_FAILURE);
412 }
413 #endif
414
415 /*
416 * Determine if it implements capabilities
417 */
418 status = pci_config_get16(confhdl, PCI_CONF_STAT);
419 if (!(status & 0x10)) {
420 goto no_cap;
421 }
422 /*
423 * Determine if it is a pci express device. If it is, save entire
424 * 4k config space treating it as a array of 32 bit integers.
425 * If it is not, do it in a usual PCI way.
426 */
427 cap_ptr = pci_config_get8(confhdl, PCI_BCNF_CAP_PTR);
428 /*
429 * Walk the capabilities searching for pci express capability
430 */
431 while (cap_ptr != PCI_CAP_NEXT_PTR_NULL) {
432 cap_id = pci_config_get8(confhdl,
433 cap_ptr + PCI_CAP_ID);
434 if (cap_id == PCI_CAP_ID_PCI_E) {
435 pcie = 1;
436 break;
437 }
438 cap_ptr = pci_config_get8(confhdl,
439 cap_ptr + PCI_CAP_NEXT_PTR);
440 }
441 no_cap:
442 if (pcie) {
443 /* PCI express device. Can have data in all 4k space */
444 regbuf = (uint32_t *)kmem_zalloc((size_t)PCIE_CONF_HDR_SIZE,
445 KM_SLEEP);
446 p = regbuf;
447 /*
448 * Allocate space for mask.
449 * mask size is 128 bytes (4096 / 4 / 8 )
450 */
451 maskbufsz = (size_t)((PCIE_CONF_HDR_SIZE/ sizeof (uint32_t)) >>
452 INDEX_SHIFT);
453 maskbuf = (uint8_t *)kmem_zalloc(maskbufsz, KM_SLEEP);
454 #ifdef __sparc
455 hp = impl_acc_hdl_get(confhdl);
456 #endif
457 for (i = 0; i < (PCIE_CONF_HDR_SIZE / sizeof (uint32_t)); i++) {
458 #ifdef __sparc
459 ret = ddi_peek32(dip, (int32_t *)(hp->ah_addr + offset),
460 (int32_t *)p);
461 if (ret == DDI_SUCCESS) {
462 #else
463 /*
464 * ddi_peek doesn't work on x86, so we use cautious pci
465 * config access instead.
466 */
467 *p = pci_config_get32(confhdl, offset);
468 if (*p != -1) {
469 #endif
470 /* it is readable register. set the bit */
471 maskbuf[i >> INDEX_SHIFT] |=
472 (uint8_t)(1 << (i & BITMASK));
473 }
474 p++;
475 offset += sizeof (uint32_t);
476 }
477
478 if ((ret = ndi_prop_update_byte_array(DDI_DEV_T_NONE, dip,
479 SAVED_CONFIG_REGS_MASK, (uchar_t *)maskbuf,
480 maskbufsz)) != DDI_PROP_SUCCESS) {
481 cmn_err(CE_WARN, "couldn't create %s property while"
482 "saving config space for %s@%d\n",
483 SAVED_CONFIG_REGS_MASK, ddi_driver_name(dip),
484 ddi_get_instance(dip));
485 } else if ((ret = ndi_prop_update_byte_array(DDI_DEV_T_NONE,
486 dip, SAVED_CONFIG_REGS, (uchar_t *)regbuf,
487 (size_t)PCIE_CONF_HDR_SIZE)) != DDI_PROP_SUCCESS) {
488 (void) ddi_prop_remove(DDI_DEV_T_NONE, dip,
489 SAVED_CONFIG_REGS_MASK);
490 cmn_err(CE_WARN, "%s%d can't update prop %s",
491 ddi_driver_name(dip), ddi_get_instance(dip),
492 SAVED_CONFIG_REGS);
493 }
494
495 kmem_free(maskbuf, (size_t)maskbufsz);
496 kmem_free(regbuf, (size_t)PCIE_CONF_HDR_SIZE);
497 } else {
498 regbuf = (uint32_t *)kmem_zalloc((size_t)PCI_CONF_HDR_SIZE,
499 KM_SLEEP);
500 chsp = (pci_config_header_state_t *)regbuf;
501
502 chsp->chs_command = pci_config_get16(confhdl, PCI_CONF_COMM);
503 chsp->chs_header_type = pci_config_get8(confhdl,
504 PCI_CONF_HEADER);
505 if ((chsp->chs_header_type & PCI_HEADER_TYPE_M) ==
506 PCI_HEADER_ONE)
507 chsp->chs_bridge_control =
508 pci_config_get16(confhdl, PCI_BCNF_BCNTRL);
509 chsp->chs_cache_line_size = pci_config_get8(confhdl,
510 PCI_CONF_CACHE_LINESZ);
511 chsp->chs_latency_timer = pci_config_get8(confhdl,
512 PCI_CONF_LATENCY_TIMER);
513 if ((chsp->chs_header_type & PCI_HEADER_TYPE_M) ==
514 PCI_HEADER_ONE) {
515 chsp->chs_sec_latency_timer =
516 pci_config_get8(confhdl, PCI_BCNF_LATENCY_TIMER);
517 }
518
519 chsp->chs_base0 = pci_config_get32(confhdl, PCI_CONF_BASE0);
520 chsp->chs_base1 = pci_config_get32(confhdl, PCI_CONF_BASE1);
521 chsp->chs_base2 = pci_config_get32(confhdl, PCI_CONF_BASE2);
522 chsp->chs_base3 = pci_config_get32(confhdl, PCI_CONF_BASE3);
523 chsp->chs_base4 = pci_config_get32(confhdl, PCI_CONF_BASE4);
524 chsp->chs_base5 = pci_config_get32(confhdl, PCI_CONF_BASE5);
525
526 /*
527 * Allocate maximum space required for capability descriptions.
528 * The maximum number of capabilties saved is the number of
529 * capabilities listed in the pci_cap_table.
530 */
531 ncaps = (sizeof (pci_cap_table) / sizeof (pci_cap_entry_t));
532 capbufsz = ncaps * sizeof (pci_cap_save_desc_t);
533 pci_cap_descp = (pci_cap_save_desc_t *)kmem_zalloc(
534 capbufsz, KM_SLEEP);
535 p = (uint32_t *)((caddr_t)regbuf +
536 sizeof (pci_config_header_state_t));
537 nwords = pci_save_caps(confhdl, p, pci_cap_descp, &ncaps);
538 regbufsz = sizeof (pci_config_header_state_t) +
539 nwords * sizeof (uint32_t);
540
541 if ((ret = ndi_prop_update_byte_array(DDI_DEV_T_NONE, dip,
542 SAVED_CONFIG_REGS, (uchar_t *)regbuf, regbufsz)) !=
543 DDI_PROP_SUCCESS) {
544 cmn_err(CE_WARN, "%s%d can't update prop %s",
545 ddi_driver_name(dip), ddi_get_instance(dip),
546 SAVED_CONFIG_REGS);
547 } else if (ncaps) {
548 ret = ndi_prop_update_byte_array(DDI_DEV_T_NONE, dip,
549 SAVED_CONFIG_REGS_CAPINFO, (uchar_t *)pci_cap_descp,
550 ncaps * sizeof (pci_cap_save_desc_t));
551 if (ret != DDI_PROP_SUCCESS)
552 (void) ddi_prop_remove(DDI_DEV_T_NONE, dip,
553 SAVED_CONFIG_REGS);
554 }
555 kmem_free(regbuf, (size_t)PCI_CONF_HDR_SIZE);
556 kmem_free(pci_cap_descp, capbufsz);
557 }
558 pci_config_teardown(&confhdl);
559
560 if (ret != DDI_PROP_SUCCESS)
561 return (DDI_FAILURE);
562
563 return (DDI_SUCCESS);
564 }
565
566 /*
567 * Saves registers associated with PCI capabilities.
568 * Returns number of 32 bit words saved.
569 * Number of capabilities saved is returned in ncapsp.
570 */
571 static uint32_t
572 pci_save_caps(ddi_acc_handle_t confhdl, uint32_t *regbuf,
573 pci_cap_save_desc_t *cap_descp, uint32_t *ncapsp)
574 {
575 return (cap_walk_and_save(confhdl, regbuf, cap_descp, ncapsp, 0));
576 }
577
578 static uint32_t
579 cap_walk_and_save(ddi_acc_handle_t confhdl, uint32_t *regbuf,
580 pci_cap_save_desc_t *cap_descp, uint32_t *ncapsp, int xspace)
581 {
582 pci_cap_entry_t *pci_cap_entp;
583 uint16_t cap_id, offset, status;
584 uint32_t words_saved = 0, nwords = 0;
585 uint16_t cap_ptr = PCI_CAP_NEXT_PTR_NULL;
586 uint16_t cap_reg;
587
588 *ncapsp = 0;
589
590 /*
591 * Determine if it implements capabilities
592 */
593 status = pci_config_get16(confhdl, PCI_CONF_STAT);
594 if (!(status & 0x10)) {
595 return (words_saved);
596 }
597
598 if (!xspace)
599 cap_ptr = pci_config_get8(confhdl, PCI_BCNF_CAP_PTR);
600 /*
601 * Walk the capabilities
602 */
603 while (cap_ptr != PCI_CAP_NEXT_PTR_NULL) {
604 cap_id = CAP_ID(confhdl, cap_ptr, xspace);
605
606 /* Search for this cap id in our table */
607 if (!xspace) {
608 pci_cap_entp = pci_cap_table;
609 cap_reg = pci_config_get16(confhdl,
610 cap_ptr + PCI_CAP_ID_REGS_OFF);
611 }
612
613 while (pci_cap_entp->cap_id != PCI_CAP_NEXT_PTR_NULL) {
614 if (pci_cap_entp->cap_id == cap_id &&
615 (cap_reg & pci_cap_entp->cap_mask) ==
616 pci_cap_entp->cap_reg)
617 break;
618
619 pci_cap_entp++;
620 }
621
622 offset = cap_ptr;
623 cap_ptr = NEXT_CAP(confhdl, cap_ptr, xspace);
624 /*
625 * If this cap id is not found in the table, there is nothing
626 * to save.
627 */
628 if (pci_cap_entp->cap_id == PCI_CAP_NEXT_PTR_NULL)
629 continue;
630 if (pci_cap_entp->cap_save_func) {
631 if ((nwords = pci_cap_entp->cap_save_func(confhdl,
632 offset, regbuf, pci_cap_entp->cap_ndwords))) {
633 cap_descp->cap_nregs = nwords;
634 cap_descp->cap_offset = offset;
635 cap_descp->cap_id = cap_id;
636 regbuf += nwords;
637 cap_descp++;
638 words_saved += nwords;
639 (*ncapsp)++;
640 }
641 }
642
643 }
644 return (words_saved);
645 }
646
647 static void
648 pci_fill_buf(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
649 uint32_t *regbuf, uint32_t nwords)
650 {
651 int i;
652
653 for (i = 0; i < nwords; i++) {
654 *regbuf = pci_config_get32(confhdl, cap_ptr);
655 regbuf++;
656 cap_ptr += 4;
657 }
658 }
659
660 static uint32_t
661 pci_generic_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr, uint32_t *regbuf,
662 uint32_t nwords)
663 {
664 pci_fill_buf(confhdl, cap_ptr, regbuf, nwords);
665 return (nwords);
666 }
667
668 /*ARGSUSED*/
669 static uint32_t
670 pci_msi_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr, uint32_t *regbuf,
671 uint32_t notused)
672 {
673 uint32_t nwords = PCI_MSI_MIN_WORDS;
674 uint16_t msi_ctrl;
675
676 /* Figure out how many registers to be saved */
677 msi_ctrl = pci_config_get16(confhdl, cap_ptr + PCI_MSI_CTRL);
678 /* If 64 bit address capable add one word */
679 if (msi_ctrl & PCI_MSI_64BIT_MASK)
680 nwords++;
681 /* If per vector masking capable, add two more words */
682 if (msi_ctrl & PCI_MSI_PVM_MASK)
683 nwords += 2;
684 pci_fill_buf(confhdl, cap_ptr, regbuf, nwords);
685
686 return (nwords);
687 }
688
689 /*ARGSUSED*/
690 static uint32_t
691 pci_pcix_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr, uint32_t *regbuf,
692 uint32_t notused)
693 {
694 uint32_t nwords = PCI_PCIX_MIN_WORDS;
695 uint16_t pcix_command;
696
697 /* Figure out how many registers to be saved */
698 pcix_command = pci_config_get16(confhdl, cap_ptr + PCI_PCIX_COMMAND);
699 /* If it is version 1 or version 2, add 4 words */
700 if (((pcix_command & PCI_PCIX_VER_MASK) == PCI_PCIX_VER_1) ||
701 ((pcix_command & PCI_PCIX_VER_MASK) == PCI_PCIX_VER_2))
702 nwords += 4;
703 pci_fill_buf(confhdl, cap_ptr, regbuf, nwords);
704
705 return (nwords);
706 }
707
708 /*ARGSUSED*/
709 static uint32_t
710 pci_pcie_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr, uint32_t *regbuf,
711 uint32_t notused)
712 {
713 return (0);
714 }
715
716 /*ARGSUSED*/
717 static uint32_t
718 pci_ht_addrmap_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
719 uint32_t *regbuf, uint32_t notused)
720 {
721 uint32_t nwords = 0;
722 uint16_t reg;
723
724 reg = pci_config_get16(confhdl, cap_ptr + PCI_CAP_ID_REGS_OFF);
725
726 switch ((reg & PCI_HTCAP_ADDRMAP_MAPTYPE_MASK) >>
727 PCI_HTCAP_ADDRMAP_MAPTYPE_SHIFT) {
728 case PCI_HTCAP_ADDRMAP_40BIT_ID:
729 /* HT3.1 spec, ch 7.7, 40-bit dma */
730 nwords = 3 + ((reg & PCI_HTCAP_ADDRMAP_NUMMAP_MASK) * 2);
731 break;
732 case PCI_HTCAP_ADDRMAP_64BIT_ID:
733 /* HT3.1 spec, ch 7.8, 64-bit dma */
734 nwords = 4;
735 break;
736 default:
737 nwords = 0;
738 }
739
740 pci_fill_buf(confhdl, cap_ptr, regbuf, nwords);
741 return (nwords);
742 }
743
744 /*ARGSUSED*/
745 static uint32_t
746 pci_ht_funcext_save(ddi_acc_handle_t confhdl, uint16_t cap_ptr,
747 uint32_t *regbuf, uint32_t notused)
748 {
749 uint32_t nwords;
750 uint16_t reg;
751
752 reg = pci_config_get16(confhdl, cap_ptr + PCI_CAP_ID_REGS_OFF);
753
754 /* HT3.1 spec, ch 7.17 */
755 nwords = 1 + (reg & PCI_HTCAP_FUNCEXT_LEN_MASK);
756
757 pci_fill_buf(confhdl, cap_ptr, regbuf, nwords);
758 return (nwords);
759 }
760
761 static void
762 pci_pmcap_check(ddi_acc_handle_t confhdl, uint32_t *regbuf,
763 uint16_t pmcap_offset)
764 {
765 uint16_t pmcsr;
766 uint16_t pmcsr_offset = pmcap_offset + PCI_PMCSR;
767 uint32_t *saved_pmcsrp = (uint32_t *)((caddr_t)regbuf + PCI_PMCSR);
768
769 /*
770 * Copy the power state bits from the PMCSR to our saved copy.
771 * This is to make sure that we don't change the D state when
772 * we restore config space of the device.
773 */
774 pmcsr = pci_config_get16(confhdl, pmcsr_offset);
775 (*saved_pmcsrp) &= ~PCI_PMCSR_STATE_MASK;
776 (*saved_pmcsrp) |= (pmcsr & PCI_PMCSR_STATE_MASK);
777 }
778
779 static void
780 pci_restore_caps(ddi_acc_handle_t confhdl, uint32_t *regbuf,
781 pci_cap_save_desc_t *cap_descp, uint32_t elements)
782 {
783 int i, j;
784 uint16_t offset;
785
786 for (i = 0; i < (elements / sizeof (pci_cap_save_desc_t)); i++) {
787 offset = cap_descp->cap_offset;
788 if (cap_descp->cap_id == PCI_CAP_ID_PM)
789 pci_pmcap_check(confhdl, regbuf, offset);
790 for (j = 0; j < cap_descp->cap_nregs; j++) {
791 pci_config_put32(confhdl, offset, *regbuf);
792 regbuf++;
793 offset += 4;
794 }
795 cap_descp++;
796 }
797 }
798
799 /*
800 * Restore config_regs from a single devinfo node.
801 */
802 int
803 pci_restore_config_regs(dev_info_t *dip)
804 {
805 ddi_acc_handle_t confhdl;
806 pci_config_header_state_t *chs_p;
807 pci_cap_save_desc_t *cap_descp;
808 uint32_t elements, i;
809 uint8_t *maskbuf;
810 uint32_t *regbuf, *p;
811 off_t offset = 0;
812
813 if (pci_config_setup(dip, &confhdl) != DDI_SUCCESS) {
814 cmn_err(CE_WARN, "%s%d can't get config handle",
815 ddi_driver_name(dip), ddi_get_instance(dip));
816 return (DDI_FAILURE);
817 }
818
819 if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip,
820 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, SAVED_CONFIG_REGS_MASK,
821 (uchar_t **)&maskbuf, &elements) == DDI_PROP_SUCCESS) {
822
823 if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip,
824 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, SAVED_CONFIG_REGS,
825 (uchar_t **)&regbuf, &elements) != DDI_PROP_SUCCESS) {
826 goto restoreconfig_err;
827 }
828 ASSERT(elements == PCIE_CONF_HDR_SIZE);
829 /* pcie device and has 4k config space saved */
830 p = regbuf;
831 for (i = 0; i < PCIE_CONF_HDR_SIZE / sizeof (uint32_t); i++) {
832 /* If the word is readable then restore it */
833 if (maskbuf[i >> INDEX_SHIFT] &
834 (uint8_t)(1 << (i & BITMASK)))
835 pci_config_put32(confhdl, offset, *p);
836 p++;
837 offset += sizeof (uint32_t);
838 }
839 ddi_prop_free(regbuf);
840 ddi_prop_free(maskbuf);
841 if (ndi_prop_remove(DDI_DEV_T_NONE, dip,
842 SAVED_CONFIG_REGS_MASK) != DDI_PROP_SUCCESS) {
843 cmn_err(CE_WARN, "%s%d can't remove prop %s",
844 ddi_driver_name(dip), ddi_get_instance(dip),
845 SAVED_CONFIG_REGS_MASK);
846 }
847 } else {
848 if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip,
849 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, SAVED_CONFIG_REGS,
850 (uchar_t **)&regbuf, &elements) != DDI_PROP_SUCCESS) {
851
852 pci_config_teardown(&confhdl);
853 return (DDI_SUCCESS);
854 }
855
856 chs_p = (pci_config_header_state_t *)regbuf;
857 pci_config_put16(confhdl, PCI_CONF_COMM,
858 chs_p->chs_command);
859 if ((chs_p->chs_header_type & PCI_HEADER_TYPE_M) ==
860 PCI_HEADER_ONE) {
861 pci_config_put16(confhdl, PCI_BCNF_BCNTRL,
862 chs_p->chs_bridge_control);
863 }
864 pci_config_put8(confhdl, PCI_CONF_CACHE_LINESZ,
865 chs_p->chs_cache_line_size);
866 pci_config_put8(confhdl, PCI_CONF_LATENCY_TIMER,
867 chs_p->chs_latency_timer);
868 if ((chs_p->chs_header_type & PCI_HEADER_TYPE_M) ==
869 PCI_HEADER_ONE)
870 pci_config_put8(confhdl, PCI_BCNF_LATENCY_TIMER,
871 chs_p->chs_sec_latency_timer);
872
873 pci_config_put32(confhdl, PCI_CONF_BASE0, chs_p->chs_base0);
874 pci_config_put32(confhdl, PCI_CONF_BASE1, chs_p->chs_base1);
875 pci_config_put32(confhdl, PCI_CONF_BASE2, chs_p->chs_base2);
876 pci_config_put32(confhdl, PCI_CONF_BASE3, chs_p->chs_base3);
877 pci_config_put32(confhdl, PCI_CONF_BASE4, chs_p->chs_base4);
878 pci_config_put32(confhdl, PCI_CONF_BASE5, chs_p->chs_base5);
879
880 if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip,
881 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM,
882 SAVED_CONFIG_REGS_CAPINFO,
883 (uchar_t **)&cap_descp, &elements) == DDI_PROP_SUCCESS) {
884 /*
885 * PCI capability related regsiters are saved.
886 * Restore them based on the description.
887 */
888 p = (uint32_t *)((caddr_t)regbuf +
889 sizeof (pci_config_header_state_t));
890 pci_restore_caps(confhdl, p, cap_descp, elements);
891 ddi_prop_free(cap_descp);
892 }
893
894 ddi_prop_free(regbuf);
895 }
896
897 /*
898 * Make sure registers are flushed
899 */
900 (void) pci_config_get32(confhdl, PCI_CONF_BASE5);
901
902
903 if (ndi_prop_remove(DDI_DEV_T_NONE, dip, SAVED_CONFIG_REGS) !=
904 DDI_PROP_SUCCESS) {
905 cmn_err(CE_WARN, "%s%d can't remove prop %s",
906 ddi_driver_name(dip), ddi_get_instance(dip),
907 SAVED_CONFIG_REGS);
908 }
909
910 pci_config_teardown(&confhdl);
911
912 return (DDI_SUCCESS);
913
914 restoreconfig_err:
915 ddi_prop_free(maskbuf);
916 if (ndi_prop_remove(DDI_DEV_T_NONE, dip, SAVED_CONFIG_REGS_MASK) !=
917 DDI_PROP_SUCCESS) {
918 cmn_err(CE_WARN, "%s%d can't remove prop %s",
919 ddi_driver_name(dip), ddi_get_instance(dip),
920 SAVED_CONFIG_REGS_MASK);
921 }
922 pci_config_teardown(&confhdl);
923 return (DDI_FAILURE);
924 }
925
926 /*ARGSUSED*/
927 static int
928 pci_lookup_pmcap(dev_info_t *dip, ddi_acc_handle_t conf_hdl,
929 uint16_t *pmcap_offsetp)
930 {
931 uint8_t cap_ptr;
932 uint8_t cap_id;
933 uint8_t header_type;
934 uint16_t status;
935
936 header_type = pci_config_get8(conf_hdl, PCI_CONF_HEADER);
937 header_type &= PCI_HEADER_TYPE_M;
938
939 /* we don't deal with bridges, etc here */
940 if (header_type != PCI_HEADER_ZERO) {
941 return (DDI_FAILURE);
942 }
943
944 status = pci_config_get16(conf_hdl, PCI_CONF_STAT);
945 if ((status & PCI_STAT_CAP) == 0) {
946 return (DDI_FAILURE);
947 }
948
949 cap_ptr = pci_config_get8(conf_hdl, PCI_CONF_CAP_PTR);
950
951 /*
952 * Walk the capabilities searching for a PM entry.
953 */
954 while (cap_ptr != PCI_CAP_NEXT_PTR_NULL) {
955 cap_id = pci_config_get8(conf_hdl, cap_ptr + PCI_CAP_ID);
956 if (cap_id == PCI_CAP_ID_PM) {
957 break;
958 }
959 cap_ptr = pci_config_get8(conf_hdl,
960 cap_ptr + PCI_CAP_NEXT_PTR);
961 }
962
963 if (cap_ptr == PCI_CAP_NEXT_PTR_NULL) {
964 return (DDI_FAILURE);
965 }
966 *pmcap_offsetp = cap_ptr;
967 return (DDI_SUCCESS);
968 }
969
970 /*
971 * Do common pci-specific suspend actions:
972 * - enable wakeup if appropriate for the device
973 * - put device in lowest D-state that supports wakeup, or D3 if none
974 * - turn off bus mastering in control register
975 * For lack of per-dip storage (parent private date is pretty busy)
976 * we use properties to store the necessary context
977 * To avoid grotting through pci config space on every suspend,
978 * we leave the prop in existence after resume, cause we know that
979 * the detach framework code will dispose of it for us.
980 */
981
982 typedef struct pci_pm_context {
983 int ppc_flags;
984 uint16_t ppc_cap_offset; /* offset in config space to pm cap */
985 uint16_t ppc_pmcsr; /* need this too */
986 uint16_t ppc_suspend_level;
987 } pci_pm_context_t;
988
989 #define SAVED_PM_CONTEXT "pci-pm-context"
990
991 /* values for ppc_flags */
992 #define PPCF_NOPMCAP 1
993
994 /*
995 * Handle pci-specific suspend processing
996 * PM CSR and PCI CMD are saved by pci_save_config_regs().
997 * If device can wake up system via PME, enable it to do so
998 * Set device power level to lowest that can generate PME, or D3 if none can
999 * Turn off bus master enable in pci command register
1000 */
1001 #if defined(__x86)
1002 extern int acpi_ddi_setwake(dev_info_t *dip, int level);
1003 #endif
1004
1005 int
1006 pci_post_suspend(dev_info_t *dip)
1007 {
1008 pci_pm_context_t *p;
1009 uint16_t pmcap, pmcsr, pcicmd;
1010 uint_t length;
1011 int ret;
1012 int fromprop = 1; /* source of memory *p */
1013 ddi_acc_handle_t hdl;
1014
1015 PMD(PMD_SX, ("pci_post_suspend %s:%d\n",
1016 ddi_driver_name(dip), ddi_get_instance(dip)))
1017
1018 if (pci_save_config_regs(dip) != DDI_SUCCESS) {
1019 return (DDI_FAILURE);
1020 }
1021
1022 if (pci_config_setup(dip, &hdl) != DDI_SUCCESS) {
1023 return (DDI_FAILURE);
1024 }
1025
1026 if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip,
1027 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM,
1028 SAVED_PM_CONTEXT, (uchar_t **)&p, &length) != DDI_PROP_SUCCESS) {
1029 p = (pci_pm_context_t *)kmem_zalloc(sizeof (*p), KM_SLEEP);
1030 fromprop = 0;
1031 if (pci_lookup_pmcap(dip, hdl,
1032 &p->ppc_cap_offset) != DDI_SUCCESS) {
1033 p->ppc_flags |= PPCF_NOPMCAP;
1034 ret = ndi_prop_update_byte_array(DDI_DEV_T_NONE, dip,
1035 SAVED_PM_CONTEXT, (uchar_t *)p,
1036 sizeof (pci_pm_context_t));
1037 if (ret != DDI_PROP_SUCCESS) {
1038 (void) ddi_prop_remove(DDI_DEV_T_NONE, dip,
1039 SAVED_PM_CONTEXT);
1040 ret = DDI_FAILURE;
1041 } else {
1042 ret = DDI_SUCCESS;
1043 }
1044 goto done;
1045 }
1046 /*
1047 * Upon suspend, set the power level to the lowest that can
1048 * wake the system. If none can, then set to lowest.
1049 * XXX later we will need to check policy to see if this
1050 * XXX device has had wakeup disabled
1051 */
1052 pmcap = pci_config_get16(hdl, p->ppc_cap_offset + PCI_PMCAP);
1053 if ((pmcap & (PCI_PMCAP_D3COLD_PME | PCI_PMCAP_D3HOT_PME)) != 0)
1054 p->ppc_suspend_level =
1055 (PCI_PMCSR_PME_EN | PCI_PMCSR_D3HOT);
1056 else if ((pmcap & PCI_PMCAP_D2_PME) != 0)
1057 p->ppc_suspend_level = PCI_PMCSR_PME_EN | PCI_PMCSR_D2;
1058 else if ((pmcap & PCI_PMCAP_D1_PME) != 0)
1059 p->ppc_suspend_level = PCI_PMCSR_PME_EN | PCI_PMCSR_D1;
1060 else if ((pmcap & PCI_PMCAP_D0_PME) != 0)
1061 p->ppc_suspend_level = PCI_PMCSR_PME_EN | PCI_PMCSR_D0;
1062 else
1063 p->ppc_suspend_level = PCI_PMCSR_D3HOT;
1064
1065 /*
1066 * we defer updating the property to catch the saved
1067 * register values as well
1068 */
1069 }
1070 /* If we set this in kmem_zalloc'd memory, we already returned above */
1071 if ((p->ppc_flags & PPCF_NOPMCAP) != 0) {
1072 goto done;
1073 }
1074
1075 pmcsr = pci_config_get16(hdl, p->ppc_cap_offset + PCI_PMCSR);
1076 p->ppc_pmcsr = pmcsr;
1077 pmcsr &= (PCI_PMCSR_STATE_MASK);
1078 pmcsr |= (PCI_PMCSR_PME_STAT | p->ppc_suspend_level);
1079
1080 /*
1081 * Push out saved register values
1082 */
1083 ret = ndi_prop_update_byte_array(DDI_DEV_T_NONE, dip, SAVED_PM_CONTEXT,
1084 (uchar_t *)p, sizeof (pci_pm_context_t));
1085 if (ret == DDI_PROP_SUCCESS) {
1086 goto done;
1087 }
1088 /* Failed; put things back the way we found them */
1089 (void) pci_restore_config_regs(dip);
1090 if (fromprop)
1091 ddi_prop_free(p);
1092 else
1093 kmem_free(p, sizeof (*p));
1094 (void) ddi_prop_remove(DDI_DEV_T_NONE, dip, SAVED_PM_CONTEXT);
1095 pci_config_teardown(&hdl);
1096 return (DDI_FAILURE);
1097
1098 done:
1099
1100 /*
1101 * According to 8.2.2 of "PCI Bus Power Management Interface
1102 * Specification Revision 1.2":
1103 * "When placing a function into D3, the operating system software is
1104 * required to disable I/O and memory space as well as bus mastering via
1105 * the PCI Command register."
1106 */
1107
1108 pcicmd = pci_config_get16(hdl, PCI_CONF_COMM);
1109 pcicmd &= ~(PCI_COMM_ME|PCI_COMM_MAE|PCI_COMM_IO);
1110 pci_config_put16(hdl, PCI_CONF_COMM, pcicmd);
1111
1112
1113 #if defined(__x86)
1114 if (pci_enable_wakeup &&
1115 (p->ppc_suspend_level & PCI_PMCSR_PME_EN) != 0) {
1116 ret = acpi_ddi_setwake(dip, 3);
1117
1118 if (ret) {
1119 PMD(PMD_SX, ("pci_post_suspend, setwake %s@%s rets "
1120 "%x\n", PM_NAME(dip), PM_ADDR(dip), ret));
1121 }
1122 }
1123 #endif
1124
1125 if (p) {
1126
1127 /*
1128 * Some BIOS (e.g. Toshiba M10) expects pci-ide to be in D0
1129 * state when we set SLP_EN, otherwise it takes 5 minutes for
1130 * the BIOS to put the system into S3.
1131 */
1132 if (strcmp(ddi_node_name(dip), "pci-ide") == 0) {
1133 pmcsr = 0;
1134 }
1135
1136 /*
1137 * pmcsr is the last write-operation to the device's PCI
1138 * config space, because we found that there are
1139 * some faulty devices whose PCI config space may not
1140 * respond correctly once in D3 state.
1141 */
1142 if ((p->ppc_flags & PPCF_NOPMCAP) == 0 && pci_enable_wakeup) {
1143 pci_config_put16(hdl, p->ppc_cap_offset + PCI_PMCSR,
1144 PCI_PMCSR_PME_STAT);
1145 pci_config_put16(hdl, p->ppc_cap_offset + PCI_PMCSR,
1146 pmcsr);
1147 }
1148
1149 if (fromprop)
1150 ddi_prop_free(p);
1151 else
1152 kmem_free(p, sizeof (*p));
1153 }
1154
1155 pci_config_teardown(&hdl);
1156
1157 return (DDI_SUCCESS);
1158 }
1159
1160 /*
1161 * The inverse of pci_post_suspend; handle pci-specific resume processing
1162 * First, turn device back on, then restore config space.
1163 */
1164
1165 int
1166 pci_pre_resume(dev_info_t *dip)
1167 {
1168 ddi_acc_handle_t hdl;
1169 pci_pm_context_t *p;
1170 /* E_FUNC_SET_NOT_USED */
1171 uint16_t pmcap, pmcsr;
1172 int flags;
1173 uint_t length;
1174 clock_t drv_usectohz(clock_t microsecs);
1175
1176 PMD(PMD_SX, ("pci_pre_resume %s:%d\n", ddi_driver_name(dip),
1177 ddi_get_instance(dip)))
1178 if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip,
1179 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM,
1180 SAVED_PM_CONTEXT, (uchar_t **)&p, &length) != DDI_PROP_SUCCESS) {
1181 return (DDI_FAILURE);
1182 }
1183 flags = p->ppc_flags;
1184 pmcap = p->ppc_cap_offset;
1185 pmcsr = p->ppc_pmcsr;
1186
1187 #if defined(__x86)
1188 /*
1189 * Turn platform wake enable back off
1190 */
1191 if (pci_enable_wakeup &&
1192 (p->ppc_suspend_level & PCI_PMCSR_PME_EN) != 0) {
1193 int retval;
1194
1195 retval = acpi_ddi_setwake(dip, 0); /* 0 for now */
1196 if (retval) {
1197 PMD(PMD_SX, ("pci_pre_resume, setwake %s@%s rets "
1198 "%x\n", PM_NAME(dip), PM_ADDR(dip), retval));
1199 }
1200 }
1201 #endif
1202
1203 ddi_prop_free(p);
1204
1205 if ((flags & PPCF_NOPMCAP) != 0)
1206 goto done;
1207
1208 if (pci_config_setup(dip, &hdl) != DDI_SUCCESS) {
1209 return (DDI_FAILURE);
1210 }
1211 pci_config_put16(hdl, pmcap + PCI_PMCSR, pmcsr);
1212 delay(drv_usectohz(10000)); /* PCI PM spec D3->D0 (10ms) */
1213 pci_config_teardown(&hdl);
1214 done:
1215 (void) pci_restore_config_regs(dip); /* fudges D-state! */
1216 return (DDI_SUCCESS);
1217 }
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