summaryrefslogtreecommitdiffstats
path: root/arch/ia64/sn/kernel/io_common.c
blob: 4433dd019d3c92ef3fa7cf71d7df61ce58864c6b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
 */

#include <linux/bootmem.h>
#include <linux/slab.h>
#include <asm/sn/types.h>
#include <asm/sn/addrs.h>
#include <asm/sn/sn_feature_sets.h>
#include <asm/sn/geo.h>
#include <asm/sn/io.h>
#include <asm/sn/l1.h>
#include <asm/sn/module.h>
#include <asm/sn/pcibr_provider.h>
#include <asm/sn/pcibus_provider_defs.h>
#include <asm/sn/pcidev.h>
#include <asm/sn/simulator.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/tioca_provider.h>
#include <asm/sn/tioce_provider.h>
#include "xtalk/hubdev.h"
#include "xtalk/xwidgetdev.h"
#include <linux/acpi.h>
#include <asm/sn/sn2/sn_hwperf.h>
#include <asm/sn/acpi.h>

extern void sn_init_cpei_timer(void);
extern void register_sn_procfs(void);
extern void sn_io_acpi_init(void);
extern void sn_io_init(void);


static struct list_head sn_sysdata_list;

/* sysdata list struct */
struct sysdata_el {
	struct list_head entry;
	void *sysdata;
};

int sn_ioif_inited;		/* SN I/O infrastructure initialized? */

int sn_acpi_rev;		/* SN ACPI revision */
EXPORT_SYMBOL_GPL(sn_acpi_rev);

struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];	/* indexed by asic type */

/*
 * Hooks and struct for unsupported pci providers
 */

static dma_addr_t
sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
{
	return 0;
}

static void
sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
{
	return;
}

static void *
sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
{
	return NULL;
}

static struct sn_pcibus_provider sn_pci_default_provider = {
	.dma_map = sn_default_pci_map,
	.dma_map_consistent = sn_default_pci_map,
	.dma_unmap = sn_default_pci_unmap,
	.bus_fixup = sn_default_pci_bus_fixup,
};

/*
 * Retrieve the DMA Flush List given nasid, widget, and device.
 * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
 */
static inline u64
sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
			     u64 address)
{
	struct ia64_sal_retval ret_stuff;
	ret_stuff.status = 0;
	ret_stuff.v0 = 0;

	SAL_CALL_NOLOCK(ret_stuff,
			(u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
			(u64) nasid, (u64) widget_num,
			(u64) device_num, (u64) address, 0, 0, 0);
	return ret_stuff.status;
}

/*
 * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
 *			  device.
 */
inline struct pcidev_info *
sn_pcidev_info_get(struct pci_dev *dev)
{
	struct pcidev_info *pcidev;

	list_for_each_entry(pcidev,
			    &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
		if (pcidev->pdi_linux_pcidev == dev)
			return pcidev;
	}
	return NULL;
}

/* Older PROM flush WAR
 *
 * 01/16/06 -- This war will be in place until a new official PROM is released.
 * Additionally note that the struct sn_flush_device_war also has to be
 * removed from arch/ia64/sn/include/xtalk/hubdev.h
 */

static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
			       struct sn_flush_device_common *common)
{
	struct sn_flush_device_war *war_list;
	struct sn_flush_device_war *dev_entry;
	struct ia64_sal_retval isrv = {0,0,0,0};

	printk_once(KERN_WARNING
		"PROM version < 4.50 -- implementing old PROM flush WAR\n");

	war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
	BUG_ON(!war_list);

	SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
			nasid, widget, __pa(war_list), 0, 0, 0 ,0);
	if (isrv.status)
		panic("sn_device_fixup_war failed: %s\n",
		      ia64_sal_strerror(isrv.status));

	dev_entry = war_list + device;
	memcpy(common,dev_entry, sizeof(*common));
	kfree(war_list);

	return isrv.status;
}

/*
 * sn_common_hubdev_init() - This routine is called to initialize the HUB data
 *			     structure for each node in the system.
 */
void __init
sn_common_hubdev_init(struct hubdev_info *hubdev)
{

	struct sn_flush_device_kernel *sn_flush_device_kernel;
	struct sn_flush_device_kernel *dev_entry;
	s64 status;
	int widget, device, size;

	/* Attach the error interrupt handlers */
	if (hubdev->hdi_nasid & 1)	/* If TIO */
		ice_error_init(hubdev);
	else
		hub_error_init(hubdev);

	for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
		hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;

	if (!hubdev->hdi_flush_nasid_list.widget_p)
		return;

	size = (HUB_WIDGET_ID_MAX + 1) *
		sizeof(struct sn_flush_device_kernel *);
	hubdev->hdi_flush_nasid_list.widget_p =
		kzalloc(size, GFP_KERNEL);
	BUG_ON(!hubdev->hdi_flush_nasid_list.widget_p);

	for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
		size = DEV_PER_WIDGET *
			sizeof(struct sn_flush_device_kernel);
		sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
		BUG_ON(!sn_flush_device_kernel);

		dev_entry = sn_flush_device_kernel;
		for (device = 0; device < DEV_PER_WIDGET;
		     device++, dev_entry++) {
			size = sizeof(struct sn_flush_device_common);
			dev_entry->common = kzalloc(size, GFP_KERNEL);
			BUG_ON(!dev_entry->common);
			if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
				status = sal_get_device_dmaflush_list(
					     hubdev->hdi_nasid, widget, device,
					     (u64)(dev_entry->common));
			else
				status = sn_device_fixup_war(hubdev->hdi_nasid,
							     widget, device,
							     dev_entry->common);
			if (status != SALRET_OK)
				panic("SAL call failed: %s\n",
				      ia64_sal_strerror(status));

			spin_lock_init(&dev_entry->sfdl_flush_lock);
		}

		if (sn_flush_device_kernel)
			hubdev->hdi_flush_nasid_list.widget_p[widget] =
							 sn_flush_device_kernel;
	}
}

void sn_pci_unfixup_slot(struct pci_dev *dev)
{
	struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;

	sn_irq_unfixup(dev);
	pci_dev_put(host_pci_dev);
	pci_dev_put(dev);
}

/*
 * sn_pci_fixup_slot()
 */
void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
		       struct sn_irq_info *sn_irq_info)
{
	int segment = pci_domain_nr(dev->bus);
	struct pcibus_bussoft *bs;
	struct pci_bus *host_pci_bus;
	struct pci_dev *host_pci_dev;
	unsigned int bus_no, devfn;

	pci_dev_get(dev); /* for the sysdata pointer */

	/* Add pcidev_info to list in pci_controller.platform_data */
	list_add_tail(&pcidev_info->pdi_list,
		      &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
	/*
	 * Using the PROMs values for the PCI host bus, get the Linux
	 * PCI host_pci_dev struct and set up host bus linkages
 	 */

	bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
	devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
 	host_pci_bus = pci_find_bus(segment, bus_no);
 	host_pci_dev = pci_get_slot(host_pci_bus, devfn);

	pcidev_info->host_pci_dev = host_pci_dev;
	pcidev_info->pdi_linux_pcidev = dev;
	pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
	bs = SN_PCIBUS_BUSSOFT(dev->bus);
	pcidev_info->pdi_pcibus_info = bs;

	if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
		SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
	} else {
		SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
	}

	/* Only set up IRQ stuff if this device has a host bus context */
	if (bs && sn_irq_info->irq_irq) {
		pcidev_info->pdi_sn_irq_info = sn_irq_info;
		dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
		sn_irq_fixup(dev, sn_irq_info);
	} else {
		pcidev_info->pdi_sn_irq_info = NULL;
		kfree(sn_irq_info);
	}
}

/*
 * sn_common_bus_fixup - Perform platform specific bus fixup.
 *			 Execute the ASIC specific fixup routine
 *			 for this bus.
 */
void
sn_common_bus_fixup(struct pci_bus *bus,
		    struct pcibus_bussoft *prom_bussoft_ptr)
{
	int cnode;
	struct pci_controller *controller;
	struct hubdev_info *hubdev_info;
	int nasid;
	void *provider_soft;
	struct sn_pcibus_provider *provider;
	struct sn_platform_data *sn_platform_data;

	controller = PCI_CONTROLLER(bus);
	/*
	 * Per-provider fixup.  Copies the bus soft structure from prom
	 * to local area and links SN_PCIBUS_BUSSOFT().
	 */

	if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
		printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
		       prom_bussoft_ptr->bs_asic_type);
		return;
	}

	if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
		return;	/* no further fixup necessary */

	provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
	if (provider == NULL)
		panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
		      prom_bussoft_ptr->bs_asic_type);

	if (provider->bus_fixup)
		provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
				 controller);
	else
		provider_soft = NULL;

	/*
	 * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
	 * after this point.
	 */
	controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
					    GFP_KERNEL);
	BUG_ON(controller->platform_data == NULL);
	sn_platform_data =
			(struct sn_platform_data *) controller->platform_data;
	sn_platform_data->provider_soft = provider_soft;
	INIT_LIST_HEAD(&((struct sn_platform_data *)
			 controller->platform_data)->pcidev_info);
	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
	cnode = nasid_to_cnodeid(nasid);
	hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
	SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
	    &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);

	/*
	 * If the node information we obtained during the fixup phase is
	 * invalid then set controller->node to -1 (undetermined)
	 */
	if (controller->node >= num_online_nodes()) {
		struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);

		printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u "
		       "L_IO=%llx L_MEM=%llx BASE=%llx\n",
		       b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
		       b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
		printk(KERN_WARNING "on node %d but only %d nodes online."
		       "Association set to undetermined.\n",
		       controller->node, num_online_nodes());
		controller->node = -1;
	}
}

void sn_bus_store_sysdata(struct pci_dev *dev)
{
	struct sysdata_el *element;

	element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
	if (!element) {
		dev_dbg(&dev->dev, "%s: out of memory!\n", __func__);
		return;
	}
	element->sysdata = SN_PCIDEV_INFO(dev);
	list_add(&element->entry, &sn_sysdata_list);
}

void sn_bus_free_sysdata(void)
{
	struct sysdata_el *element;
	struct list_head *list, *safe;

	list_for_each_safe(list, safe, &sn_sysdata_list) {
		element = list_entry(list, struct sysdata_el, entry);
		list_del(&element->entry);
		list_del(&(((struct pcidev_info *)
			     (element->sysdata))->pdi_list));
		kfree(element->sysdata);
		kfree(element);
	}
	return;
}

/*
 * hubdev_init_node() - Creates the HUB data structure and link them to it's
 *			own NODE specific data area.
 */
void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
{
	struct hubdev_info *hubdev_info;
	int size;
	pg_data_t *pg;

	size = sizeof(struct hubdev_info);

	if (node >= num_online_nodes())	/* Headless/memless IO nodes */
		pg = NODE_DATA(0);
	else
		pg = NODE_DATA(node);

	hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);

	npda->pdinfo = (void *)hubdev_info;
}

geoid_t
cnodeid_get_geoid(cnodeid_t cnode)
{
	struct hubdev_info *hubdev;

	hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
	return hubdev->hdi_geoid;
}

void sn_generate_path(struct pci_bus *pci_bus, char *address)
{
	nasid_t nasid;
	cnodeid_t cnode;
	geoid_t geoid;
	moduleid_t moduleid;
	u16 bricktype;

	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
	cnode = nasid_to_cnodeid(nasid);
	geoid = cnodeid_get_geoid(cnode);
	moduleid = geo_module(geoid);

	sprintf(address, "module_%c%c%c%c%.2d",
		'0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
		'0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
		'0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
		MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));

	/* Tollhouse requires slot id to be displayed */
	bricktype = MODULE_GET_BTYPE(moduleid);
	if ((bricktype == L1_BRICKTYPE_191010) ||
	    (bricktype == L1_BRICKTYPE_1932))
			sprintf(address + strlen(address), "^%d",
						geo_slot(geoid));
}

void __devinit
sn_pci_fixup_bus(struct pci_bus *bus)
{

	if (SN_ACPI_BASE_SUPPORT())
		sn_acpi_bus_fixup(bus);
	else
		sn_bus_fixup(bus);
}

/*
 * sn_io_early_init - Perform early IO (and some non-IO) initialization.
 *		      In particular, setup the sn_pci_provider[] array.
 *		      This needs to be done prior to any bus scanning
 *		      (acpi_scan_init()) in the ACPI case, as the SN
 *		      bus fixup code will reference the array.
 */
static int __init
sn_io_early_init(void)
{
	int i;

	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
		return 0;

	/* we set the acpi revision to that of the DSDT table OEM rev. */
	{
		struct acpi_table_header *header = NULL;

		acpi_get_table(ACPI_SIG_DSDT, 1, &header);
		BUG_ON(header == NULL);
		sn_acpi_rev = header->oem_revision;
	}

	/*
	 * prime sn_pci_provider[].  Individual provider init routines will
	 * override their respective default entries.
	 */

	for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
		sn_pci_provider[i] = &sn_pci_default_provider;

	pcibr_init_provider();
	tioca_init_provider();
	tioce_init_provider();

	/*
	 * This is needed to avoid bounce limit checks in the blk layer
	 */
	ia64_max_iommu_merge_mask = ~PAGE_MASK;

	sn_irq_lh_init();
	INIT_LIST_HEAD(&sn_sysdata_list);
	sn_init_cpei_timer();

#ifdef CONFIG_PROC_FS
	register_sn_procfs();
#endif

	{
		struct acpi_table_header *header;
		(void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
		printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
			header->oem_revision);
	}
	if (SN_ACPI_BASE_SUPPORT())
		sn_io_acpi_init();
	else
		sn_io_init();
	return 0;
}

arch_initcall(sn_io_early_init);

/*
 * sn_io_late_init() - Perform any final platform specific IO initialization.
 */

int __init
sn_io_late_init(void)
{
	struct pci_bus *bus;
	struct pcibus_bussoft *bussoft;
	cnodeid_t cnode;
	nasid_t nasid;
	cnodeid_t near_cnode;

	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
		return 0;

	/*
	 * Setup closest node in pci_controller->node for
	 * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
	 * info from the PROM).
	 */
	bus = NULL;
	while ((bus = pci_find_next_bus(bus)) != NULL) {
		bussoft = SN_PCIBUS_BUSSOFT(bus);
		nasid = NASID_GET(bussoft->bs_base);
		cnode = nasid_to_cnodeid(nasid);
		if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
		    (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
		    (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
			/* PCI Bridge: find nearest node with CPUs */
			int e = sn_hwperf_get_nearest_node(cnode, NULL,
							   &near_cnode);
			if (e < 0) {
				near_cnode = (cnodeid_t)-1; /* use any node */
				printk(KERN_WARNING "sn_io_late_init: failed "
				       "to find near node with CPUs for "
				       "node %d, err=%d\n", cnode, e);
			}
			PCI_CONTROLLER(bus)->node = near_cnode;
		}
	}

	sn_ioif_inited = 1;	/* SN I/O infrastructure now initialized */

	return 0;
}

fs_initcall(sn_io_late_init);

EXPORT_SYMBOL(sn_pci_unfixup_slot);
EXPORT_SYMBOL(sn_bus_store_sysdata);
EXPORT_SYMBOL(sn_bus_free_sysdata);
EXPORT_SYMBOL(sn_generate_path);