Altix: ACPI SSDT PCI device support
[sfrench/cifs-2.6.git] / arch / ia64 / sn / kernel / io_common.c
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 #include "acpi/acglobal.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
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
63 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
64 {
65         return;
66 }
67
68 static void *
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
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 *
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 static u8 war_implemented = 0;
124
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         if (!war_implemented) {
133                 printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
134                        "PROM flush WAR\n");
135                 war_implemented = 1;
136         }
137
138         war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
139         if (!war_list)
140                 BUG();
141
142         SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
143                         nasid, widget, __pa(war_list), 0, 0, 0 ,0);
144         if (isrv.status)
145                 panic("sn_device_fixup_war failed: %s\n",
146                       ia64_sal_strerror(isrv.status));
147
148         dev_entry = war_list + device;
149         memcpy(common,dev_entry, sizeof(*common));
150         kfree(war_list);
151
152         return isrv.status;
153 }
154
155 /*
156  * sn_common_hubdev_init() - This routine is called to initialize the HUB data
157  *                           structure for each node in the system.
158  */
159 void __init
160 sn_common_hubdev_init(struct hubdev_info *hubdev)
161 {
162
163         struct sn_flush_device_kernel *sn_flush_device_kernel;
164         struct sn_flush_device_kernel *dev_entry;
165         s64 status;
166         int widget, device, size;
167
168         /* Attach the error interrupt handlers */
169         if (hubdev->hdi_nasid & 1)      /* If TIO */
170                 ice_error_init(hubdev);
171         else
172                 hub_error_init(hubdev);
173
174         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
175                 hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
176
177         if (!hubdev->hdi_flush_nasid_list.widget_p)
178                 return;
179
180         size = (HUB_WIDGET_ID_MAX + 1) *
181                 sizeof(struct sn_flush_device_kernel *);
182         hubdev->hdi_flush_nasid_list.widget_p =
183                 kzalloc(size, GFP_KERNEL);
184         if (!hubdev->hdi_flush_nasid_list.widget_p)
185                 BUG();
186
187         for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
188                 size = DEV_PER_WIDGET *
189                         sizeof(struct sn_flush_device_kernel);
190                 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
191                 if (!sn_flush_device_kernel)
192                         BUG();
193
194                 dev_entry = sn_flush_device_kernel;
195                 for (device = 0; device < DEV_PER_WIDGET;
196                      device++, dev_entry++) {
197                         size = sizeof(struct sn_flush_device_common);
198                         dev_entry->common = kzalloc(size, GFP_KERNEL);
199                         if (!dev_entry->common)
200                                 BUG();
201                         if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
202                                 status = sal_get_device_dmaflush_list(
203                                              hubdev->hdi_nasid, widget, device,
204                                              (u64)(dev_entry->common));
205                         else
206                                 status = sn_device_fixup_war(hubdev->hdi_nasid,
207                                                              widget, device,
208                                                              dev_entry->common);
209                         if (status != SALRET_OK)
210                                 panic("SAL call failed: %s\n",
211                                       ia64_sal_strerror(status));
212
213                         spin_lock_init(&dev_entry->sfdl_flush_lock);
214                 }
215
216                 if (sn_flush_device_kernel)
217                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
218                                                          sn_flush_device_kernel;
219         }
220 }
221
222 void sn_pci_unfixup_slot(struct pci_dev *dev)
223 {
224         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
225
226         sn_irq_unfixup(dev);
227         pci_dev_put(host_pci_dev);
228         pci_dev_put(dev);
229 }
230
231 /*
232  * sn_pci_fixup_slot()
233  */
234 void sn_pci_fixup_slot(struct pci_dev *dev, struct pcidev_info *pcidev_info,
235                        struct sn_irq_info *sn_irq_info)
236 {
237         int segment = pci_domain_nr(dev->bus);
238         struct pcibus_bussoft *bs;
239         struct pci_bus *host_pci_bus;
240         struct pci_dev *host_pci_dev;
241         unsigned int bus_no, devfn;
242
243         pci_dev_get(dev); /* for the sysdata pointer */
244
245         /* Add pcidev_info to list in pci_controller.platform_data */
246         list_add_tail(&pcidev_info->pdi_list,
247                       &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
248         /*
249          * Using the PROMs values for the PCI host bus, get the Linux
250          * PCI host_pci_dev struct and set up host bus linkages
251          */
252
253         bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
254         devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
255         host_pci_bus = pci_find_bus(segment, bus_no);
256         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
257
258         pcidev_info->host_pci_dev = host_pci_dev;
259         pcidev_info->pdi_linux_pcidev = dev;
260         pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
261         bs = SN_PCIBUS_BUSSOFT(dev->bus);
262         pcidev_info->pdi_pcibus_info = bs;
263
264         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
265                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
266         } else {
267                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
268         }
269
270         /* Only set up IRQ stuff if this device has a host bus context */
271         if (bs && sn_irq_info->irq_irq) {
272                 pcidev_info->pdi_sn_irq_info = sn_irq_info;
273                 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
274                 sn_irq_fixup(dev, sn_irq_info);
275         } else {
276                 pcidev_info->pdi_sn_irq_info = NULL;
277                 kfree(sn_irq_info);
278         }
279 }
280
281 /*
282  * sn_common_bus_fixup - Perform platform specific bus fixup.
283  *                       Execute the ASIC specific fixup routine
284  *                       for this bus.
285  */
286 void
287 sn_common_bus_fixup(struct pci_bus *bus,
288                     struct pcibus_bussoft *prom_bussoft_ptr)
289 {
290         int cnode;
291         struct pci_controller *controller;
292         struct hubdev_info *hubdev_info;
293         int nasid;
294         void *provider_soft;
295         struct sn_pcibus_provider *provider;
296         struct sn_platform_data *sn_platform_data;
297
298         controller = PCI_CONTROLLER(bus);
299         /*
300          * Per-provider fixup.  Copies the bus soft structure from prom
301          * to local area and links SN_PCIBUS_BUSSOFT().
302          */
303
304         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
305                 printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
306                        prom_bussoft_ptr->bs_asic_type);
307                 return;
308         }
309
310         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
311                 return; /* no further fixup necessary */
312
313         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
314         if (provider == NULL)
315                 panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
316                       prom_bussoft_ptr->bs_asic_type);
317
318         if (provider->bus_fixup)
319                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
320                                  controller);
321         else
322                 provider_soft = NULL;
323
324         /*
325          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
326          * after this point.
327          */
328         controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
329                                             GFP_KERNEL);
330         if (controller->platform_data == NULL)
331                 BUG();
332         sn_platform_data =
333                         (struct sn_platform_data *) controller->platform_data;
334         sn_platform_data->provider_soft = provider_soft;
335         INIT_LIST_HEAD(&((struct sn_platform_data *)
336                          controller->platform_data)->pcidev_info);
337         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
338         cnode = nasid_to_cnodeid(nasid);
339         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
340         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
341             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
342
343         /*
344          * If the node information we obtained during the fixup phase is
345          * invalid then set controller->node to -1 (undetermined)
346          */
347         if (controller->node >= num_online_nodes()) {
348                 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
349
350                 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
351                        "L_IO=%lx L_MEM=%lx BASE=%lx\n",
352                        b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
353                        b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
354                 printk(KERN_WARNING "on node %d but only %d nodes online."
355                        "Association set to undetermined.\n",
356                        controller->node, num_online_nodes());
357                 controller->node = -1;
358         }
359 }
360
361 void sn_bus_store_sysdata(struct pci_dev *dev)
362 {
363         struct sysdata_el *element;
364
365         element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
366         if (!element) {
367                 dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
368                 return;
369         }
370         element->sysdata = SN_PCIDEV_INFO(dev);
371         list_add(&element->entry, &sn_sysdata_list);
372 }
373
374 void sn_bus_free_sysdata(void)
375 {
376         struct sysdata_el *element;
377         struct list_head *list, *safe;
378
379         list_for_each_safe(list, safe, &sn_sysdata_list) {
380                 element = list_entry(list, struct sysdata_el, entry);
381                 list_del(&element->entry);
382                 list_del(&(((struct pcidev_info *)
383                              (element->sysdata))->pdi_list));
384                 kfree(element->sysdata);
385                 kfree(element);
386         }
387         return;
388 }
389
390 /*
391  * hubdev_init_node() - Creates the HUB data structure and link them to it's
392  *                      own NODE specific data area.
393  */
394 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
395 {
396         struct hubdev_info *hubdev_info;
397         int size;
398         pg_data_t *pg;
399
400         size = sizeof(struct hubdev_info);
401
402         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
403                 pg = NODE_DATA(0);
404         else
405                 pg = NODE_DATA(node);
406
407         hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
408
409         npda->pdinfo = (void *)hubdev_info;
410 }
411
412 geoid_t
413 cnodeid_get_geoid(cnodeid_t cnode)
414 {
415         struct hubdev_info *hubdev;
416
417         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
418         return hubdev->hdi_geoid;
419 }
420
421 void sn_generate_path(struct pci_bus *pci_bus, char *address)
422 {
423         nasid_t nasid;
424         cnodeid_t cnode;
425         geoid_t geoid;
426         moduleid_t moduleid;
427         u16 bricktype;
428
429         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
430         cnode = nasid_to_cnodeid(nasid);
431         geoid = cnodeid_get_geoid(cnode);
432         moduleid = geo_module(geoid);
433
434         sprintf(address, "module_%c%c%c%c%.2d",
435                 '0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
436                 '0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
437                 '0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
438                 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
439
440         /* Tollhouse requires slot id to be displayed */
441         bricktype = MODULE_GET_BTYPE(moduleid);
442         if ((bricktype == L1_BRICKTYPE_191010) ||
443             (bricktype == L1_BRICKTYPE_1932))
444                         sprintf(address, "%s^%d", address, geo_slot(geoid));
445 }
446
447 void __devinit
448 sn_pci_fixup_bus(struct pci_bus *bus)
449 {
450
451         if (SN_ACPI_BASE_SUPPORT())
452                 sn_acpi_bus_fixup(bus);
453         else
454                 sn_bus_fixup(bus);
455 }
456
457 /*
458  * sn_io_early_init - Perform early IO (and some non-IO) initialization.
459  *                    In particular, setup the sn_pci_provider[] array.
460  *                    This needs to be done prior to any bus scanning
461  *                    (acpi_scan_init()) in the ACPI case, as the SN
462  *                    bus fixup code will reference the array.
463  */
464 static int __init
465 sn_io_early_init(void)
466 {
467         int i;
468
469         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
470                 return 0;
471
472         /* we set the acpi revision to that of the DSDT table OEM rev. */
473         {
474                 struct acpi_table_header *header = NULL;
475
476                 acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
477                 BUG_ON(header == NULL);
478                 sn_acpi_rev = header->oem_revision;
479         }
480
481         /*
482          * prime sn_pci_provider[].  Individial provider init routines will
483          * override their respective default entries.
484          */
485
486         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
487                 sn_pci_provider[i] = &sn_pci_default_provider;
488
489         pcibr_init_provider();
490         tioca_init_provider();
491         tioce_init_provider();
492
493         /*
494          * This is needed to avoid bounce limit checks in the blk layer
495          */
496         ia64_max_iommu_merge_mask = ~PAGE_MASK;
497
498         sn_irq_lh_init();
499         INIT_LIST_HEAD(&sn_sysdata_list);
500         sn_init_cpei_timer();
501
502 #ifdef CONFIG_PROC_FS
503         register_sn_procfs();
504 #endif
505
506         {
507                 struct acpi_table_header *header;
508                 (void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);
509                 printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
510                         header->oem_revision);
511         }
512         if (SN_ACPI_BASE_SUPPORT())
513                 sn_io_acpi_init();
514         else
515                 sn_io_init();
516         return 0;
517 }
518
519 arch_initcall(sn_io_early_init);
520
521 /*
522  * sn_io_late_init() - Perform any final platform specific IO initialization.
523  */
524
525 int __init
526 sn_io_late_init(void)
527 {
528         struct pci_bus *bus;
529         struct pcibus_bussoft *bussoft;
530         cnodeid_t cnode;
531         nasid_t nasid;
532         cnodeid_t near_cnode;
533
534         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
535                 return 0;
536
537         /*
538          * Setup closest node in pci_controller->node for
539          * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
540          * info from the PROM).
541          */
542         bus = NULL;
543         while ((bus = pci_find_next_bus(bus)) != NULL) {
544                 bussoft = SN_PCIBUS_BUSSOFT(bus);
545                 nasid = NASID_GET(bussoft->bs_base);
546                 cnode = nasid_to_cnodeid(nasid);
547                 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
548                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE)) {
549                         /* TIO 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 "pcibr_bus_fixup: failed "
555                                        "to find near node with CPUs to TIO "
556                                        "node %d, err=%d\n", cnode, e);
557                         }
558                         PCI_CONTROLLER(bus)->node = near_cnode;
559                 } else if (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC) {
560                         PCI_CONTROLLER(bus)->node = cnode;
561                 }
562         }
563
564         sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
565
566         return 0;
567 }
568
569 fs_initcall(sn_io_late_init);
570
571 EXPORT_SYMBOL(sn_pci_unfixup_slot);
572 EXPORT_SYMBOL(sn_bus_store_sysdata);
573 EXPORT_SYMBOL(sn_bus_free_sysdata);
574 EXPORT_SYMBOL(sn_generate_path);
575