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