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