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
6 * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
9 #include <linux/bootmem.h>
10 #include <linux/nodemask.h>
11 #include <asm/sn/types.h>
12 #include <asm/sn/addrs.h>
13 #include <asm/sn/sn_feature_sets.h>
14 #include <asm/sn/geo.h>
15 #include <asm/sn/io.h>
16 #include <asm/sn/pcibr_provider.h>
17 #include <asm/sn/pcibus_provider_defs.h>
18 #include <asm/sn/pcidev.h>
19 #include <asm/sn/simulator.h>
20 #include <asm/sn/sn_sal.h>
21 #include <asm/sn/tioca_provider.h>
22 #include <asm/sn/tioce_provider.h>
23 #include "xtalk/hubdev.h"
24 #include "xtalk/xwidgetdev.h"
27 extern void sn_init_cpei_timer(void);
28 extern void register_sn_procfs(void);
30 static struct list_head sn_sysdata_list;
32 /* sysdata list struct */
34 struct list_head entry;
39 struct hubdev_info hubdev;
43 moduleid_t id; /* Module ID of this module */
44 struct slab_info slab_info[MAX_SLABS + 1];
47 int sn_ioif_inited; /* SN I/O infrastructure initialized? */
49 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES]; /* indexed by asic type */
51 static int max_segment_number; /* Default highest segment number */
52 static int max_pcibus_number = 255; /* Default highest pci bus number */
55 * Hooks and struct for unsupported pci providers
59 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size)
65 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
71 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
76 static struct sn_pcibus_provider sn_pci_default_provider = {
77 .dma_map = sn_default_pci_map,
78 .dma_map_consistent = sn_default_pci_map,
79 .dma_unmap = sn_default_pci_unmap,
80 .bus_fixup = sn_default_pci_bus_fixup,
84 * Retrieve the DMA Flush List given nasid, widget, and device.
85 * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
88 sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
91 struct ia64_sal_retval ret_stuff;
95 SAL_CALL_NOLOCK(ret_stuff,
96 (u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
97 (u64) nasid, (u64) widget_num,
98 (u64) device_num, (u64) address, 0, 0, 0);
99 return ret_stuff.status;
103 * Retrieve the hub device info structure for the given nasid.
105 static inline u64 sal_get_hubdev_info(u64 handle, u64 address)
107 struct ia64_sal_retval ret_stuff;
108 ret_stuff.status = 0;
111 SAL_CALL_NOLOCK(ret_stuff,
112 (u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
113 (u64) handle, (u64) address, 0, 0, 0, 0, 0);
118 * Retrieve the pci bus information given the bus number.
120 static inline u64 sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
122 struct ia64_sal_retval ret_stuff;
123 ret_stuff.status = 0;
126 SAL_CALL_NOLOCK(ret_stuff,
127 (u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
128 (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
133 * Retrieve the pci device information given the bus and device|function number.
136 sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
139 struct ia64_sal_retval ret_stuff;
140 ret_stuff.status = 0;
143 SAL_CALL_NOLOCK(ret_stuff,
144 (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
145 (u64) segment, (u64) bus_number, (u64) devfn,
152 * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
155 inline struct pcidev_info *
156 sn_pcidev_info_get(struct pci_dev *dev)
158 struct pcidev_info *pcidev;
160 list_for_each_entry(pcidev,
161 &(SN_PCI_CONTROLLER(dev)->pcidev_info), pdi_list) {
162 if (pcidev->pdi_linux_pcidev == dev) {
169 /* Older PROM flush WAR
171 * 01/16/06 -- This war will be in place until a new official PROM is released.
172 * Additionally note that the struct sn_flush_device_war also has to be
173 * removed from arch/ia64/sn/include/xtalk/hubdev.h
175 static u8 war_implemented = 0;
177 static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
178 struct sn_flush_device_common *common)
180 struct sn_flush_device_war *war_list;
181 struct sn_flush_device_war *dev_entry;
182 struct ia64_sal_retval isrv = {0,0,0,0};
184 if (!war_implemented) {
185 printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
190 war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
194 SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
195 nasid, widget, __pa(war_list), 0, 0, 0 ,0);
197 panic("sn_device_fixup_war failed: %s\n",
198 ia64_sal_strerror(isrv.status));
200 dev_entry = war_list + device;
201 memcpy(common,dev_entry, sizeof(*common));
208 * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
209 * each node in the system.
211 static void __init sn_fixup_ionodes(void)
213 struct sn_flush_device_kernel *sn_flush_device_kernel;
214 struct sn_flush_device_kernel *dev_entry;
215 struct hubdev_info *hubdev;
218 int i, widget, device, size;
221 * Get SGI Specific HUB chipset information.
222 * Inform Prom that this kernel can support domain bus numbering.
224 for (i = 0; i < num_cnodes; i++) {
225 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
226 nasid = cnodeid_to_nasid(i);
227 hubdev->max_segment_number = 0xffffffff;
228 hubdev->max_pcibus_number = 0xff;
229 status = sal_get_hubdev_info(nasid, (u64) __pa(hubdev));
233 /* Save the largest Domain and pcibus numbers found. */
234 if (hubdev->max_segment_number) {
236 * Dealing with a Prom that supports segments.
238 max_segment_number = hubdev->max_segment_number;
239 max_pcibus_number = hubdev->max_pcibus_number;
242 /* Attach the error interrupt handlers */
244 ice_error_init(hubdev);
246 hub_error_init(hubdev);
248 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
249 hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
251 if (!hubdev->hdi_flush_nasid_list.widget_p)
254 size = (HUB_WIDGET_ID_MAX + 1) *
255 sizeof(struct sn_flush_device_kernel *);
256 hubdev->hdi_flush_nasid_list.widget_p =
257 kzalloc(size, GFP_KERNEL);
258 if (!hubdev->hdi_flush_nasid_list.widget_p)
261 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
262 size = DEV_PER_WIDGET *
263 sizeof(struct sn_flush_device_kernel);
264 sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
265 if (!sn_flush_device_kernel)
268 dev_entry = sn_flush_device_kernel;
269 for (device = 0; device < DEV_PER_WIDGET;
270 device++,dev_entry++) {
271 size = sizeof(struct sn_flush_device_common);
272 dev_entry->common = kzalloc(size, GFP_KERNEL);
273 if (!dev_entry->common)
276 if (sn_prom_feature_available(
277 PRF_DEVICE_FLUSH_LIST))
278 status = sal_get_device_dmaflush_list(
279 nasid, widget, device,
280 (u64)(dev_entry->common));
282 status = sn_device_fixup_war(nasid,
285 if (status != SALRET_OK)
286 panic("SAL call failed: %s\n",
287 ia64_sal_strerror(status));
289 spin_lock_init(&dev_entry->sfdl_flush_lock);
292 if (sn_flush_device_kernel)
293 hubdev->hdi_flush_nasid_list.widget_p[widget] =
294 sn_flush_device_kernel;
300 * sn_pci_window_fixup() - Create a pci_window for each device resource.
301 * Until ACPI support is added, we need this code
302 * to setup pci_windows for use by
303 * pcibios_bus_to_resource(),
304 * pcibios_resource_to_bus(), etc.
307 sn_pci_window_fixup(struct pci_dev *dev, unsigned int count,
310 struct pci_controller *controller = PCI_CONTROLLER(dev->bus);
313 unsigned int new_count;
314 struct pci_window *new_window;
318 idx = controller->windows;
319 new_count = controller->windows + count;
320 new_window = kcalloc(new_count, sizeof(struct pci_window), GFP_KERNEL);
321 if (new_window == NULL)
323 if (controller->window) {
324 memcpy(new_window, controller->window,
325 sizeof(struct pci_window) * controller->windows);
326 kfree(controller->window);
329 /* Setup a pci_window for each device resource. */
330 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
331 if (pci_addrs[i] == -1)
334 new_window[idx].offset = dev->resource[i].start - pci_addrs[i];
335 new_window[idx].resource = dev->resource[i];
339 controller->windows = new_count;
340 controller->window = new_window;
343 void sn_pci_unfixup_slot(struct pci_dev *dev)
345 struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
348 pci_dev_put(host_pci_dev);
353 * sn_pci_fixup_slot() - This routine sets up a slot's resources
354 * consistent with the Linux PCI abstraction layer. Resources acquired
355 * from our PCI provider include PIO maps to BAR space and interrupt
358 void sn_pci_fixup_slot(struct pci_dev *dev)
360 unsigned int count = 0;
362 int segment = pci_domain_nr(dev->bus);
364 struct pcibus_bussoft *bs;
365 struct pci_bus *host_pci_bus;
366 struct pci_dev *host_pci_dev;
367 struct pcidev_info *pcidev_info;
368 s64 pci_addrs[PCI_ROM_RESOURCE + 1];
369 struct sn_irq_info *sn_irq_info;
371 unsigned int bus_no, devfn;
373 pci_dev_get(dev); /* for the sysdata pointer */
374 pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
376 BUG(); /* Cannot afford to run out of memory */
378 sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
380 BUG(); /* Cannot afford to run out of memory */
382 /* Call to retrieve pci device information needed by kernel. */
383 status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
385 (u64) __pa(pcidev_info),
386 (u64) __pa(sn_irq_info));
388 BUG(); /* Cannot get platform pci device information */
390 /* Add pcidev_info to list in sn_pci_controller struct */
391 list_add_tail(&pcidev_info->pdi_list,
392 &(SN_PCI_CONTROLLER(dev->bus)->pcidev_info));
394 /* Copy over PIO Mapped Addresses */
395 for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
396 unsigned long start, end, addr;
398 if (!pcidev_info->pdi_pio_mapped_addr[idx]) {
403 start = dev->resource[idx].start;
404 end = dev->resource[idx].end;
410 pci_addrs[idx] = start;
412 addr = pcidev_info->pdi_pio_mapped_addr[idx];
413 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
414 dev->resource[idx].start = addr;
415 dev->resource[idx].end = addr + size;
416 if (dev->resource[idx].flags & IORESOURCE_IO)
417 dev->resource[idx].parent = &ioport_resource;
419 dev->resource[idx].parent = &iomem_resource;
421 /* Create a pci_window in the pci_controller struct for
422 * each device resource.
425 sn_pci_window_fixup(dev, count, pci_addrs);
428 * Using the PROMs values for the PCI host bus, get the Linux
429 * PCI host_pci_dev struct and set up host bus linkages
432 bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
433 devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
434 host_pci_bus = pci_find_bus(segment, bus_no);
435 host_pci_dev = pci_get_slot(host_pci_bus, devfn);
437 pcidev_info->host_pci_dev = host_pci_dev;
438 pcidev_info->pdi_linux_pcidev = dev;
439 pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
440 bs = SN_PCIBUS_BUSSOFT(dev->bus);
441 pcidev_info->pdi_pcibus_info = bs;
443 if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
444 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
446 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
449 /* Only set up IRQ stuff if this device has a host bus context */
450 if (bs && sn_irq_info->irq_irq) {
451 pcidev_info->pdi_sn_irq_info = sn_irq_info;
452 dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
453 sn_irq_fixup(dev, sn_irq_info);
455 pcidev_info->pdi_sn_irq_info = NULL;
460 * MSI currently not supported on altix. Remove this when
461 * the MSI abstraction patches are integrated into the kernel
462 * (sometime after 2.6.16 releases)
468 * sn_pci_controller_fixup() - This routine sets up a bus's resources
469 * consistent with the Linux PCI abstraction layer.
471 void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
475 struct pci_controller *controller;
476 struct sn_pci_controller *sn_controller;
477 struct pcibus_bussoft *prom_bussoft_ptr;
478 struct hubdev_info *hubdev_info;
480 struct sn_pcibus_provider *provider;
482 status = sal_get_pcibus_info((u64) segment, (u64) busnum,
483 (u64) ia64_tpa(&prom_bussoft_ptr));
485 return; /*bus # does not exist */
486 prom_bussoft_ptr = __va(prom_bussoft_ptr);
488 /* Allocate a sn_pci_controller, which has a pci_controller struct
489 * as the first member.
491 sn_controller = kzalloc(sizeof(struct sn_pci_controller), GFP_KERNEL);
494 INIT_LIST_HEAD(&sn_controller->pcidev_info);
495 controller = &sn_controller->pci_controller;
496 controller->segment = segment;
499 bus = pci_scan_bus(busnum, &pci_root_ops, controller);
501 goto error_return; /* error, or bus already scanned */
506 goto error_return; /* sysdata already alloc'd */
509 * Per-provider fixup. Copies the contents from prom to local
510 * area and links SN_PCIBUS_BUSSOFT().
513 if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
514 goto error_return; /* unsupported asic type */
516 if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
517 goto error_return; /* no further fixup necessary */
519 provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
520 if (provider == NULL)
521 goto error_return; /* no provider registerd for this asic */
523 bus->sysdata = controller;
524 if (provider->bus_fixup)
525 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
527 provider_soft = NULL;
529 if (provider_soft == NULL) {
530 /* fixup failed or not applicable */
536 * Setup pci_windows for legacy IO and MEM space.
537 * (Temporary until ACPI support is in place.)
539 controller->window = kcalloc(2, sizeof(struct pci_window), GFP_KERNEL);
540 if (controller->window == NULL)
542 controller->window[0].offset = prom_bussoft_ptr->bs_legacy_io;
543 controller->window[0].resource.name = "legacy_io";
544 controller->window[0].resource.flags = IORESOURCE_IO;
545 controller->window[0].resource.start = prom_bussoft_ptr->bs_legacy_io;
546 controller->window[0].resource.end =
547 controller->window[0].resource.start + 0xffff;
548 controller->window[0].resource.parent = &ioport_resource;
549 controller->window[1].offset = prom_bussoft_ptr->bs_legacy_mem;
550 controller->window[1].resource.name = "legacy_mem";
551 controller->window[1].resource.flags = IORESOURCE_MEM;
552 controller->window[1].resource.start = prom_bussoft_ptr->bs_legacy_mem;
553 controller->window[1].resource.end =
554 controller->window[1].resource.start + (1024 * 1024) - 1;
555 controller->window[1].resource.parent = &iomem_resource;
556 controller->windows = 2;
559 * Generic bus fixup goes here. Don't reference prom_bussoft_ptr
563 PCI_CONTROLLER(bus)->platform_data = provider_soft;
564 nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
565 cnode = nasid_to_cnodeid(nasid);
566 hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
567 SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
568 &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
571 * If the node information we obtained during the fixup phase is invalid
572 * then set controller->node to -1 (undetermined)
574 if (controller->node >= num_online_nodes()) {
575 struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
577 printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
578 "L_IO=%lx L_MEM=%lx BASE=%lx\n",
579 b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
580 b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
581 printk(KERN_WARNING "on node %d but only %d nodes online."
582 "Association set to undetermined.\n",
583 controller->node, num_online_nodes());
584 controller->node = -1;
590 kfree(sn_controller);
594 void sn_bus_store_sysdata(struct pci_dev *dev)
596 struct sysdata_el *element;
598 element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
600 dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
603 element->sysdata = SN_PCIDEV_INFO(dev);
604 list_add(&element->entry, &sn_sysdata_list);
607 void sn_bus_free_sysdata(void)
609 struct sysdata_el *element;
610 struct list_head *list, *safe;
612 list_for_each_safe(list, safe, &sn_sysdata_list) {
613 element = list_entry(list, struct sysdata_el, entry);
614 list_del(&element->entry);
615 list_del(&(((struct pcidev_info *)
616 (element->sysdata))->pdi_list));
617 kfree(element->sysdata);
624 * Ugly hack to get PCI setup until we have a proper ACPI namespace.
627 #define PCI_BUSES_TO_SCAN 256
629 static int __init sn_pci_init(void)
632 struct pci_dev *pci_dev = NULL;
634 if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
638 * prime sn_pci_provider[]. Individial provider init routines will
639 * override their respective default entries.
642 for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
643 sn_pci_provider[i] = &sn_pci_default_provider;
645 pcibr_init_provider();
646 tioca_init_provider();
647 tioce_init_provider();
650 * This is needed to avoid bounce limit checks in the blk layer
652 ia64_max_iommu_merge_mask = ~PAGE_MASK;
655 INIT_LIST_HEAD(&sn_sysdata_list);
656 sn_init_cpei_timer();
658 #ifdef CONFIG_PROC_FS
659 register_sn_procfs();
662 /* busses are not known yet ... */
663 for (i = 0; i <= max_segment_number; i++)
664 for (j = 0; j <= max_pcibus_number; j++)
665 sn_pci_controller_fixup(i, j, NULL);
668 * Generic Linux PCI Layer has created the pci_bus and pci_dev
669 * structures - time for us to add our SN PLatform specific
674 pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
675 sn_pci_fixup_slot(pci_dev);
677 sn_ioif_inited = 1; /* sn I/O infrastructure now initialized */
683 * hubdev_init_node() - Creates the HUB data structure and link them to it's
684 * own NODE specific data area.
686 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
688 struct hubdev_info *hubdev_info;
692 size = sizeof(struct hubdev_info);
694 if (node >= num_online_nodes()) /* Headless/memless IO nodes */
697 pg = NODE_DATA(node);
699 hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
701 npda->pdinfo = (void *)hubdev_info;
705 cnodeid_get_geoid(cnodeid_t cnode)
707 struct hubdev_info *hubdev;
709 hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
710 return hubdev->hdi_geoid;
713 subsys_initcall(sn_pci_init);
714 EXPORT_SYMBOL(sn_pci_fixup_slot);
715 EXPORT_SYMBOL(sn_pci_unfixup_slot);
716 EXPORT_SYMBOL(sn_pci_controller_fixup);
717 EXPORT_SYMBOL(sn_bus_store_sysdata);
718 EXPORT_SYMBOL(sn_bus_free_sysdata);
719 EXPORT_SYMBOL(sn_pcidev_info_get);