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TOMOYO Linux Cross Reference
Linux/arch/ia64/sn/kernel/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/memblock.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
 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,
 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 *
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 
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 = kcalloc(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
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 
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  */
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
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 
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 
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  */
384 void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
385 {
386         struct hubdev_info *hubdev_info;
387         int size;
388 
389         size = sizeof(struct hubdev_info);
390 
391         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
392                 node = 0;
393 
394         hubdev_info = (struct hubdev_info *)memblock_alloc_node(size,
395                                                                 SMP_CACHE_BYTES,
396                                                                 node);
397 
398         npda->pdinfo = (void *)hubdev_info;
399 }
400 
401 geoid_t
402 cnodeid_get_geoid(cnodeid_t cnode)
403 {
404         struct hubdev_info *hubdev;
405 
406         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
407         return hubdev->hdi_geoid;
408 }
409 
410 void sn_generate_path(struct pci_bus *pci_bus, char *address)
411 {
412         nasid_t nasid;
413         cnodeid_t cnode;
414         geoid_t geoid;
415         moduleid_t moduleid;
416         u16 bricktype;
417 
418         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
419         cnode = nasid_to_cnodeid(nasid);
420         geoid = cnodeid_get_geoid(cnode);
421         moduleid = geo_module(geoid);
422 
423         sprintf(address, "module_%c%c%c%c%.2d",
424                 ''+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
425                 ''+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
426                 ''+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
427                 MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
428 
429         /* Tollhouse requires slot id to be displayed */
430         bricktype = MODULE_GET_BTYPE(moduleid);
431         if ((bricktype == L1_BRICKTYPE_191010) ||
432             (bricktype == L1_BRICKTYPE_1932))
433                         sprintf(address + strlen(address), "^%d",
434                                                 geo_slot(geoid));
435 }
436 
437 void sn_pci_fixup_bus(struct pci_bus *bus)
438 {
439 
440         if (SN_ACPI_BASE_SUPPORT())
441                 sn_acpi_bus_fixup(bus);
442         else
443                 sn_bus_fixup(bus);
444 }
445 
446 /*
447  * sn_io_early_init - Perform early IO (and some non-IO) initialization.
448  *                    In particular, setup the sn_pci_provider[] array.
449  *                    This needs to be done prior to any bus scanning
450  *                    (acpi_scan_init()) in the ACPI case, as the SN
451  *                    bus fixup code will reference the array.
452  */
453 static int __init
454 sn_io_early_init(void)
455 {
456         int i;
457 
458         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
459                 return 0;
460 
461         /* we set the acpi revision to that of the DSDT table OEM rev. */
462         {
463                 struct acpi_table_header *header = NULL;
464 
465                 acpi_get_table(ACPI_SIG_DSDT, 1, &header);
466                 BUG_ON(header == NULL);
467                 sn_acpi_rev = header->oem_revision;
468         }
469 
470         /*
471          * prime sn_pci_provider[].  Individual provider init routines will
472          * override their respective default entries.
473          */
474 
475         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
476                 sn_pci_provider[i] = &sn_pci_default_provider;
477 
478         pcibr_init_provider();
479         tioca_init_provider();
480         tioce_init_provider();
481 
482         sn_irq_lh_init();
483         INIT_LIST_HEAD(&sn_sysdata_list);
484         sn_init_cpei_timer();
485 
486 #ifdef CONFIG_PROC_FS
487         register_sn_procfs();
488 #endif
489 
490         {
491                 struct acpi_table_header *header;
492                 (void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
493                 printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
494                         header->oem_revision);
495         }
496         if (SN_ACPI_BASE_SUPPORT())
497                 sn_io_acpi_init();
498         else
499                 sn_io_init();
500         return 0;
501 }
502 
503 arch_initcall(sn_io_early_init);
504 
505 /*
506  * sn_io_late_init() - Perform any final platform specific IO initialization.
507  */
508 
509 int __init
510 sn_io_late_init(void)
511 {
512         struct pci_bus *bus;
513         struct pcibus_bussoft *bussoft;
514         cnodeid_t cnode;
515         nasid_t nasid;
516         cnodeid_t near_cnode;
517 
518         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
519                 return 0;
520 
521         /*
522          * Setup closest node in pci_controller->node for
523          * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
524          * info from the PROM).
525          */
526         bus = NULL;
527         while ((bus = pci_find_next_bus(bus)) != NULL) {
528                 bussoft = SN_PCIBUS_BUSSOFT(bus);
529                 nasid = NASID_GET(bussoft->bs_base);
530                 cnode = nasid_to_cnodeid(nasid);
531                 if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
532                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE) ||
533                     (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC)) {
534                         /* PCI Bridge: find nearest node with CPUs */
535                         int e = sn_hwperf_get_nearest_node(cnode, NULL,
536                                                            &near_cnode);
537                         if (e < 0) {
538                                 near_cnode = (cnodeid_t)-1; /* use any node */
539                                 printk(KERN_WARNING "sn_io_late_init: failed "
540                                        "to find near node with CPUs for "
541                                        "node %d, err=%d\n", cnode, e);
542                         }
543                         PCI_CONTROLLER(bus)->node = near_cnode;
544                 }
545         }
546 
547         sn_ioif_inited = 1;     /* SN I/O infrastructure now initialized */
548 
549         return 0;
550 }
551 
552 fs_initcall(sn_io_late_init);
553 
554 EXPORT_SYMBOL(sn_pci_unfixup_slot);
555 EXPORT_SYMBOL(sn_bus_store_sysdata);
556 EXPORT_SYMBOL(sn_bus_free_sysdata);
557 EXPORT_SYMBOL(sn_generate_path);
558 
559 

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