1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
7 */
8
9 #include <linux/bootmem.h>
10 #include <asm/sn/types.h>
11 #include <asm/sn/addrs.h>
12 #include <asm/sn/sn_feature_sets.h>
13 #include <asm/sn/geo.h>
14 #include <asm/sn/io.h>
15 #include <asm/sn/l1.h>
16 #include <asm/sn/module.h>
17 #include <asm/sn/pcibr_provider.h>
18 #include <asm/sn/pcibus_provider_defs.h>
19 #include <asm/sn/pcidev.h>
20 #include <asm/sn/simulator.h>
21 #include <asm/sn/sn_sal.h>
22 #include <asm/sn/tioca_provider.h>
23 #include <asm/sn/tioce_provider.h>
24 #include "xtalk/hubdev.h"
25 #include "xtalk/xwidgetdev.h"
26 #include <linux/acpi.h>
27 #include <asm/sn/sn2/sn_hwperf.h>
28 #include <asm/sn/acpi.h>
29
30 extern void sn_init_cpei_timer(void);
31 extern void register_sn_procfs(void);
32 extern void sn_io_acpi_init(void);
33 extern void sn_io_init(void);
34
35
36 static struct list_head sn_sysdata_list;
37
38 /* sysdata list struct */
39 struct sysdata_el {
40 struct list_head entry;
41 void *sysdata;
42 };
43
44 int sn_ioif_inited; /* SN I/O infrastructure initialized? */
45
46 int sn_acpi_rev; /* SN ACPI revision */
47 EXPORT_SYMBOL_GPL(sn_acpi_rev);
48
49 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES]; /* indexed by asic type */
50
51 /*
52 * Hooks and struct for unsupported pci providers
53 */
54
55 static dma_addr_t
sn_default_pci_map(struct pci_dev * pdev,unsigned long paddr,size_t size,int type)56 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
57 {
58 return 0;
59 }
60
61 static void
sn_default_pci_unmap(struct pci_dev * pdev,dma_addr_t addr,int direction)62 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
63 {
64 return;
65 }
66
67 static void *
sn_default_pci_bus_fixup(struct pcibus_bussoft * soft,struct pci_controller * controller)68 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
69 {
70 return NULL;
71 }
72
73 static struct sn_pcibus_provider sn_pci_default_provider = {
74 .dma_map = sn_default_pci_map,
75 .dma_map_consistent = sn_default_pci_map,
76 .dma_unmap = sn_default_pci_unmap,
77 .bus_fixup = sn_default_pci_bus_fixup,
78 };
79
80 /*
81 * Retrieve the DMA Flush List given nasid, widget, and device.
82 * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
83 */
84 static inline u64
sal_get_device_dmaflush_list(u64 nasid,u64 widget_num,u64 device_num,u64 address)85 sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
86 u64 address)
87 {
88 struct ia64_sal_retval ret_stuff;
89 ret_stuff.status = 0;
90 ret_stuff.v0 = 0;
91
92 SAL_CALL_NOLOCK(ret_stuff,
93 (u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
94 (u64) nasid, (u64) widget_num,
95 (u64) device_num, (u64) address, 0, 0, 0);
96 return ret_stuff.status;
97 }
98
99 /*
100 * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
101 * device.
102 */
103 inline struct pcidev_info *
sn_pcidev_info_get(struct pci_dev * dev)104 sn_pcidev_info_get(struct pci_dev *dev)
105 {
106 struct pcidev_info *pcidev;
107
108 list_for_each_entry(pcidev,
109 &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
110 if (pcidev->pdi_linux_pcidev == dev)
111 return pcidev;
112 }
113 return NULL;
114 }
115
116 /* Older PROM flush WAR
117 *
118 * 01/16/06 -- This war will be in place until a new official PROM is released.
119 * Additionally note that the struct sn_flush_device_war also has to be
120 * removed from arch/ia64/sn/include/xtalk/hubdev.h
121 */
122 static u8 war_implemented = 0;
123
sn_device_fixup_war(u64 nasid,u64 widget,int device,struct sn_flush_device_common * common)124 static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
125 struct sn_flush_device_common *common)
126 {
127 struct sn_flush_device_war *war_list;
128 struct sn_flush_device_war *dev_entry;
129 struct ia64_sal_retval isrv = {0,0,0,0};
130
131 if (!war_implemented) {
132 printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
133 "PROM flush WAR\n");
134 war_implemented = 1;
135 }
136
137 war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
138 if (!war_list)
139 BUG();
140
141 SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
142 nasid, widget, __pa(war_list), 0, 0, 0 ,0);
143 if (isrv.status)
144 panic("sn_device_fixup_war failed: %s\n",
145 ia64_sal_strerror(isrv.status));
146
147 dev_entry = war_list + device;
148 memcpy(common,dev_entry, sizeof(*common));
149 kfree(war_list);
150
151 return isrv.status;
152 }
153
154 /*
155 * sn_common_hubdev_init() - This routine is called to initialize the HUB data
156 * structure for each node in the system.
157 */
158 void __init
sn_common_hubdev_init(struct hubdev_info * hubdev)159 sn_common_hubdev_init(struct hubdev_info *hubdev)
160 {
161
162 struct sn_flush_device_kernel *sn_flush_device_kernel;
163 struct sn_flush_device_kernel *dev_entry;
164 s64 status;
165 int widget, device, size;
166
167 /* Attach the error interrupt handlers */
168 if (hubdev->hdi_nasid & 1) /* If TIO */
169 ice_error_init(hubdev);
170 else
171 hub_error_init(hubdev);
172
173 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
174 hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
175
176 if (!hubdev->hdi_flush_nasid_list.widget_p)
177 return;
178
179 size = (HUB_WIDGET_ID_MAX + 1) *
180 sizeof(struct sn_flush_device_kernel *);
181 hubdev->hdi_flush_nasid_list.widget_p =
182 kzalloc(size, GFP_KERNEL);
183 if (!hubdev->hdi_flush_nasid_list.widget_p)
184 BUG();
185
186 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
187 size = DEV_PER_WIDGET *
188 sizeof(struct sn_flush_device_kernel);
189 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
190 if (!sn_flush_device_kernel)
191 BUG();
192
193 dev_entry = sn_flush_device_kernel;
194 for (device = 0; device < DEV_PER_WIDGET;
195 device++, dev_entry++) {
196 size = sizeof(struct sn_flush_device_common);
197 dev_entry->common = kzalloc(size, GFP_KERNEL);
198 if (!dev_entry->common)
199 BUG();
200 if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
201 status = sal_get_device_dmaflush_list(
202 hubdev->hdi_nasid, widget, device,
203 (u64)(dev_entry->common));
204 else
205 status = sn_device_fixup_war(hubdev->hdi_nasid,
206 widget, device,
207 dev_entry->common);
208 if (status != SALRET_OK)
209 panic("SAL call failed: %s\n",
210 ia64_sal_strerror(status));
211
212 spin_lock_init(&dev_entry->sfdl_flush_lock);
213 }
214
215 if (sn_flush_device_kernel)
216 hubdev->hdi_flush_nasid_list.widget_p[widget] =
217 sn_flush_device_kernel;
218 }
219 }
220
sn_pci_unfixup_slot(struct pci_dev * dev)221 void sn_pci_unfixup_slot(struct pci_dev *dev)
222 {
223 struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
224
225 sn_irq_unfixup(dev);
226 pci_dev_put(host_pci_dev);
227 pci_dev_put(dev);
228 }
229
230 /*
231 * sn_pci_fixup_slot()
232 */
sn_pci_fixup_slot(struct pci_dev * dev,struct pcidev_info * pcidev_info,struct sn_irq_info * sn_irq_info)233 void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
234 struct sn_irq_info *sn_irq_info)
235 {
236 int segment = pci_domain_nr(dev->bus);
237 struct pcibus_bussoft *bs;
238 struct pci_bus *host_pci_bus;
239 struct pci_dev *host_pci_dev;
240 unsigned int bus_no, devfn;
241
242 pci_dev_get(dev); /* for the sysdata pointer */
243
244 /* Add pcidev_info to list in pci_controller.platform_data */
245 list_add_tail(&pcidev_info->pdi_list,
246 &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
247 /*
248 * Using the PROMs values for the PCI host bus, get the Linux
249 * PCI host_pci_dev struct and set up host bus linkages
250 */
251
252 bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
253 devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
254 host_pci_bus = pci_find_bus(segment, bus_no);
255 host_pci_dev = pci_get_slot(host_pci_bus, devfn);
256
257 pcidev_info->host_pci_dev = host_pci_dev;
258 pcidev_info->pdi_linux_pcidev = dev;
259 pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
260 bs = SN_PCIBUS_BUSSOFT(dev->bus);
261 pcidev_info->pdi_pcibus_info = bs;
262
263 if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
264 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
265 } else {
266 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
267 }
268
269 /* Only set up IRQ stuff if this device has a host bus context */
270 if (bs && sn_irq_info->irq_irq) {
271 pcidev_info->pdi_sn_irq_info = sn_irq_info;
272 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
273 sn_irq_fixup(dev, sn_irq_info);
274 } else {
275 pcidev_info->pdi_sn_irq_info = NULL;
276 kfree(sn_irq_info);
277 }
278 }
279
280 /*
281 * sn_common_bus_fixup - Perform platform specific bus fixup.
282 * Execute the ASIC specific fixup routine
283 * for this bus.
284 */
285 void
sn_common_bus_fixup(struct pci_bus * bus,struct pcibus_bussoft * prom_bussoft_ptr)286 sn_common_bus_fixup(struct pci_bus *bus,
287 struct pcibus_bussoft *prom_bussoft_ptr)
288 {
289 int cnode;
290 struct pci_controller *controller;
291 struct hubdev_info *hubdev_info;
292 int nasid;
293 void *provider_soft;
294 struct sn_pcibus_provider *provider;
295 struct sn_platform_data *sn_platform_data;
296
297 controller = PCI_CONTROLLER(bus);
298 /*
299 * Per-provider fixup. Copies the bus soft structure from prom
300 * to local area and links SN_PCIBUS_BUSSOFT().
301 */
302
303 if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
304 printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
305 prom_bussoft_ptr->bs_asic_type);
306 return;
307 }
308
309 if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
310 return; /* no further fixup necessary */
311
312 provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
313 if (provider == NULL)
314 panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
315 prom_bussoft_ptr->bs_asic_type);
316
317 if (provider->bus_fixup)
318 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
319 controller);
320 else
321 provider_soft = NULL;
322
323 /*
324 * Generic bus fixup goes here. Don't reference prom_bussoft_ptr
325 * after this point.
326 */
327 controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
328 GFP_KERNEL);
329 if (controller->platform_data == NULL)
330 BUG();
331 sn_platform_data =
332 (struct sn_platform_data *) controller->platform_data;
333 sn_platform_data->provider_soft = provider_soft;
334 INIT_LIST_HEAD(&((struct sn_platform_data *)
335 controller->platform_data)->pcidev_info);
336 nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
337 cnode = nasid_to_cnodeid(nasid);
338 hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
339 SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
340 &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
341
342 /*
343 * If the node information we obtained during the fixup phase is
344 * invalid then set controller->node to -1 (undetermined)
345 */
346 if (controller->node >= num_online_nodes()) {
347 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
348
349 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u "
350 "L_IO=%lx L_MEM=%lx BASE=%lx\n",
351 b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
352 b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
353 printk(KERN_WARNING "on node %d but only %d nodes online."
354 "Association set to undetermined.\n",
355 controller->node, num_online_nodes());
356 controller->node = -1;
357 }
358 }
359
sn_bus_store_sysdata(struct pci_dev * dev)360 void sn_bus_store_sysdata(struct pci_dev *dev)
361 {
362 struct sysdata_el *element;
363
364 element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
365 if (!element) {
366 dev_dbg(&dev->dev, "%s: out of memory!\n", __func__);
367 return;
368 }
369 element->sysdata = SN_PCIDEV_INFO(dev);
370 list_add(&element->entry, &sn_sysdata_list);
371 }
372
sn_bus_free_sysdata(void)373 void sn_bus_free_sysdata(void)
374 {
375 struct sysdata_el *element;
376 struct list_head *list, *safe;
377
378 list_for_each_safe(list, safe, &sn_sysdata_list) {
379 element = list_entry(list, struct sysdata_el, entry);
380 list_del(&element->entry);
381 list_del(&(((struct pcidev_info *)
382 (element->sysdata))->pdi_list));
383 kfree(element->sysdata);
384 kfree(element);
385 }
386 return;
387 }
388
389 /*
390 * hubdev_init_node() - Creates the HUB data structure and link them to it's
391 * own NODE specific data area.
392 */
hubdev_init_node(nodepda_t * npda,cnodeid_t node)393 void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
394 {
395 struct hubdev_info *hubdev_info;
396 int size;
397 pg_data_t *pg;
398
399 size = sizeof(struct hubdev_info);
400
401 if (node >= num_online_nodes()) /* Headless/memless IO nodes */
402 pg = NODE_DATA(0);
403 else
404 pg = NODE_DATA(node);
405
406 hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
407
408 npda->pdinfo = (void *)hubdev_info;
409 }
410
411 geoid_t
cnodeid_get_geoid(cnodeid_t cnode)412 cnodeid_get_geoid(cnodeid_t cnode)
413 {
414 struct hubdev_info *hubdev;
415
416 hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
417 return hubdev->hdi_geoid;
418 }
419
sn_generate_path(struct pci_bus * pci_bus,char * address)420 void sn_generate_path(struct pci_bus *pci_bus, char *address)
421 {
422 nasid_t nasid;
423 cnodeid_t cnode;
424 geoid_t geoid;
425 moduleid_t moduleid;
426 u16 bricktype;
427
428 nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
429 cnode = nasid_to_cnodeid(nasid);
430 geoid = cnodeid_get_geoid(cnode);
431 moduleid = geo_module(geoid);
432
433 sprintf(address, "module_%c%c%c%c%.2d",
434 '0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
435 '0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
436 '0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
437 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
438
439 /* Tollhouse requires slot id to be displayed */
440 bricktype = MODULE_GET_BTYPE(moduleid);
441 if ((bricktype == L1_BRICKTYPE_191010) ||
442 (bricktype == L1_BRICKTYPE_1932))
443 sprintf(address, "%s^%d", address, geo_slot(geoid));
444 }
445
446 void __devinit
sn_pci_fixup_bus(struct pci_bus * bus)447 sn_pci_fixup_bus(struct pci_bus *bus)
448 {
449
450 if (SN_ACPI_BASE_SUPPORT())
451 sn_acpi_bus_fixup(bus);
452 else
453 sn_bus_fixup(bus);
454 }
455
456 /*
457 * sn_io_early_init - Perform early IO (and some non-IO) initialization.
458 * In particular, setup the sn_pci_provider[] array.
459 * This needs to be done prior to any bus scanning
460 * (acpi_scan_init()) in the ACPI case, as the SN
461 * bus fixup code will reference the array.
462 */
463 static int __init
sn_io_early_init(void)464 sn_io_early_init(void)
465 {
466 int i;
467
468 if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
469 return 0;
470
471 /* we set the acpi revision to that of the DSDT table OEM rev. */
472 {
473 struct acpi_table_header *header = NULL;
474
475 acpi_get_table(ACPI_SIG_DSDT, 1, &header);
476 BUG_ON(header == NULL);
477 sn_acpi_rev = header->oem_revision;
478 }
479
480 /*
481 * prime sn_pci_provider[]. Individual provider init routines will
482 * override their respective default entries.
483 */
484
485 for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
486 sn_pci_provider[i] = &sn_pci_default_provider;
487
488 pcibr_init_provider();
489 tioca_init_provider();
490 tioce_init_provider();
491
492 /*
493 * This is needed to avoid bounce limit checks in the blk layer
494 */
495 ia64_max_iommu_merge_mask = ~PAGE_MASK;
496
497 sn_irq_lh_init();
498 INIT_LIST_HEAD(&sn_sysdata_list);
499 sn_init_cpei_timer();
500
501 #ifdef CONFIG_PROC_FS
502 register_sn_procfs();
503 #endif
504
505 {
506 struct acpi_table_header *header;
507 (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
508 printk(KERN_INFO "ACPI DSDT OEM Rev 0x%x\n",
509 header->oem_revision);
510 }
511 if (SN_ACPI_BASE_SUPPORT())
512 sn_io_acpi_init();
513 else
514 sn_io_init();
515 return 0;
516 }
517
518 arch_initcall(sn_io_early_init);
519
520 /*
521 * sn_io_late_init() - Perform any final platform specific IO initialization.
522 */
523
524 int __init
sn_io_late_init(void)525 sn_io_late_init(void)
526 {
527 struct pci_bus *bus;
528 struct pcibus_bussoft *bussoft;
529 cnodeid_t cnode;
530 nasid_t nasid;
531 cnodeid_t near_cnode;
532
533 if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
534 return 0;
535
536 /*
537 * Setup closest node in pci_controller->node for
538 * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
539 * info from the PROM).
540 */
541 bus = NULL;
542 while ((bus = pci_find_next_bus(bus)) != NULL) {
543 bussoft = SN_PCIBUS_BUSSOFT(bus);
544 nasid = NASID_GET(bussoft->bs_base);
545 cnode = nasid_to_cnodeid(nasid);
546 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
547 (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
548 (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
549 /* PCI Bridge: find nearest node with CPUs */
550 int e = sn_hwperf_get_nearest_node(cnode, NULL,
551 &near_cnode);
552 if (e < 0) {
553 near_cnode = (cnodeid_t)-1; /* use any node */
554 printk(KERN_WARNING "sn_io_late_init: failed "
555 "to find near node with CPUs for "
556 "node %d, err=%d\n", cnode, e);
557 }
558 PCI_CONTROLLER(bus)->node = near_cnode;
559 }
560 }
561
562 sn_ioif_inited = 1; /* SN I/O infrastructure now initialized */
563
564 return 0;
565 }
566
567 fs_initcall(sn_io_late_init);
568
569 EXPORT_SYMBOL(sn_pci_unfixup_slot);
570 EXPORT_SYMBOL(sn_bus_store_sysdata);
571 EXPORT_SYMBOL(sn_bus_free_sysdata);
572 EXPORT_SYMBOL(sn_generate_path);
573
574