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io_common.c
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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>
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 */
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
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
64 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
65 {
66  return;
67 }
68 
69 static void *
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
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,
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 *
107 {
108  struct pcidev_info *pcidev;
109 
110  list_for_each_entry(pcidev,
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 
125 static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
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 
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 
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
157 {
158 
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);
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 
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  */
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
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;
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",
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 
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 
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  */
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
404 {
405  struct hubdev_info *hubdev;
406 
407  hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
408  return hubdev->hdi_geoid;
409 }
410 
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 
438 void __devinit
440 {
441 
442  if (SN_ACPI_BASE_SUPPORT())
443  sn_acpi_bus_fixup(bus);
444  else
445  sn_bus_fixup(bus);
446 }
447 
448 /*
449  * sn_io_early_init - Perform early IO (and some non-IO) initialization.
450  * In particular, setup the sn_pci_provider[] array.
451  * This needs to be done prior to any bus scanning
452  * (acpi_scan_init()) in the ACPI case, as the SN
453  * bus fixup code will reference the array.
454  */
455 static int __init
456 sn_io_early_init(void)
457 {
458  int i;
459 
460  if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
461  return 0;
462 
463  /* we set the acpi revision to that of the DSDT table OEM rev. */
464  {
465  struct acpi_table_header *header = NULL;
466 
467  acpi_get_table(ACPI_SIG_DSDT, 1, &header);
468  BUG_ON(header == NULL);
469  sn_acpi_rev = header->oem_revision;
470  }
471 
472  /*
473  * prime sn_pci_provider[]. Individual provider init routines will
474  * override their respective default entries.
475  */
476 
477  for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
478  sn_pci_provider[i] = &sn_pci_default_provider;
479 
483 
484  /*
485  * This is needed to avoid bounce limit checks in the blk layer
486  */
488 
489  sn_irq_lh_init();
490  INIT_LIST_HEAD(&sn_sysdata_list);
492 
493 #ifdef CONFIG_PROC_FS
495 #endif
496 
497  {
498  struct acpi_table_header *header;
499  (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
500  printk(KERN_INFO "ACPI DSDT OEM Rev 0x%x\n",
501  header->oem_revision);
502  }
503  if (SN_ACPI_BASE_SUPPORT())
504  sn_io_acpi_init();
505  else
506  sn_io_init();
507  return 0;
508 }
509 
510 arch_initcall(sn_io_early_init);
511 
512 /*
513  * sn_io_late_init() - Perform any final platform specific IO initialization.
514  */
515 
516 int __init
518 {
519  struct pci_bus *bus;
520  struct pcibus_bussoft *bussoft;
521  cnodeid_t cnode;
522  nasid_t nasid;
523  cnodeid_t near_cnode;
524 
525  if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
526  return 0;
527 
528  /*
529  * Setup closest node in pci_controller->node for
530  * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
531  * info from the PROM).
532  */
533  bus = NULL;
534  while ((bus = pci_find_next_bus(bus)) != NULL) {
535  bussoft = SN_PCIBUS_BUSSOFT(bus);
536  nasid = NASID_GET(bussoft->bs_base);
537  cnode = nasid_to_cnodeid(nasid);
538  if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
539  (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
540  (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
541  /* PCI Bridge: find nearest node with CPUs */
542  int e = sn_hwperf_get_nearest_node(cnode, NULL,
543  &near_cnode);
544  if (e < 0) {
545  near_cnode = (cnodeid_t)-1; /* use any node */
546  printk(KERN_WARNING "sn_io_late_init: failed "
547  "to find near node with CPUs for "
548  "node %d, err=%d\n", cnode, e);
549  }
550  PCI_CONTROLLER(bus)->node = near_cnode;
551  }
552  }
553 
554  sn_ioif_inited = 1; /* SN I/O infrastructure now initialized */
555 
556  return 0;
557 }
558 
560 
565