[IA64] hotplug/ia64: SN Hotplug Driver - SN Hotplug Driver code
[linux-2.6.git] / arch / ia64 / sn / kernel / io_init.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) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved.
7  */
8
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/geo.h>
14 #include <asm/sn/io.h>
15 #include <asm/sn/pcibr_provider.h>
16 #include <asm/sn/pcibus_provider_defs.h>
17 #include <asm/sn/pcidev.h>
18 #include <asm/sn/simulator.h>
19 #include <asm/sn/sn_sal.h>
20 #include <asm/sn/tioca_provider.h>
21 #include "xtalk/hubdev.h"
22 #include "xtalk/xwidgetdev.h"
23
24 nasid_t master_nasid = INVALID_NASID;   /* Partition Master */
25
26 static struct list_head sn_sysdata_list;
27
28 /* sysdata list struct */
29 struct sysdata_el {
30         struct list_head entry;
31         void *sysdata;
32 };
33
34 struct slab_info {
35         struct hubdev_info hubdev;
36 };
37
38 struct brick {
39         moduleid_t id;          /* Module ID of this module        */
40         struct slab_info slab_info[MAX_SLABS + 1];
41 };
42
43 int sn_ioif_inited = 0;         /* SN I/O infrastructure initialized? */
44
45 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];       /* indexed by asic type */
46
47 /*
48  * Hooks and struct for unsupported pci providers
49  */
50
51 static dma_addr_t
52 sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size)
53 {
54         return 0;
55 }
56
57 static void
58 sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
59 {
60         return;
61 }
62
63 static void *
64 sn_default_pci_bus_fixup(struct pcibus_bussoft *soft)
65 {
66         return NULL;
67 }
68
69 static struct sn_pcibus_provider sn_pci_default_provider = {
70         .dma_map = sn_default_pci_map,
71         .dma_map_consistent = sn_default_pci_map,
72         .dma_unmap = sn_default_pci_unmap,
73         .bus_fixup = sn_default_pci_bus_fixup,
74 };
75
76 /*
77  * Retrieve the DMA Flush List given nasid.  This list is needed 
78  * to implement the WAR - Flush DMA data on PIO Reads.
79  */
80 static inline uint64_t
81 sal_get_widget_dmaflush_list(u64 nasid, u64 widget_num, u64 address)
82 {
83
84         struct ia64_sal_retval ret_stuff;
85         ret_stuff.status = 0;
86         ret_stuff.v0 = 0;
87
88         SAL_CALL_NOLOCK(ret_stuff,
89                         (u64) SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
90                         (u64) nasid, (u64) widget_num, (u64) address, 0, 0, 0,
91                         0);
92         return ret_stuff.v0;
93
94 }
95
96 /*
97  * Retrieve the hub device info structure for the given nasid.
98  */
99 static inline uint64_t sal_get_hubdev_info(u64 handle, u64 address)
100 {
101
102         struct ia64_sal_retval ret_stuff;
103         ret_stuff.status = 0;
104         ret_stuff.v0 = 0;
105
106         SAL_CALL_NOLOCK(ret_stuff,
107                         (u64) SN_SAL_IOIF_GET_HUBDEV_INFO,
108                         (u64) handle, (u64) address, 0, 0, 0, 0, 0);
109         return ret_stuff.v0;
110 }
111
112 /*
113  * Retrieve the pci bus information given the bus number.
114  */
115 static inline uint64_t sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
116 {
117
118         struct ia64_sal_retval ret_stuff;
119         ret_stuff.status = 0;
120         ret_stuff.v0 = 0;
121
122         SAL_CALL_NOLOCK(ret_stuff,
123                         (u64) SN_SAL_IOIF_GET_PCIBUS_INFO,
124                         (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0);
125         return ret_stuff.v0;
126 }
127
128 /*
129  * Retrieve the pci device information given the bus and device|function number.
130  */
131 static inline uint64_t
132 sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev, 
133                         u64 sn_irq_info)
134 {
135         struct ia64_sal_retval ret_stuff;
136         ret_stuff.status = 0;
137         ret_stuff.v0 = 0;
138
139         SAL_CALL_NOLOCK(ret_stuff,
140                         (u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
141                         (u64) segment, (u64) bus_number, (u64) devfn, 
142                         (u64) pci_dev,
143                         sn_irq_info, 0, 0);
144         return ret_stuff.v0;
145 }
146
147 /*
148  * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for 
149  *      each node in the system.
150  */
151 static void sn_fixup_ionodes(void)
152 {
153
154         struct sn_flush_device_list *sn_flush_device_list;
155         struct hubdev_info *hubdev;
156         uint64_t status;
157         uint64_t nasid;
158         int i, widget;
159
160         for (i = 0; i < numionodes; i++) {
161                 hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
162                 nasid = cnodeid_to_nasid(i);
163                 status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
164                 if (status)
165                         continue;
166
167                 /* Attach the error interrupt handlers */
168                 if (nasid & 1)
169                         ice_error_init(hubdev);
170                 else
171                         hub_error_init(hubdev);
172
173                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
174                         hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
175
176                 if (!hubdev->hdi_flush_nasid_list.widget_p)
177                         continue;
178
179                 hubdev->hdi_flush_nasid_list.widget_p =
180                     kmalloc((HUB_WIDGET_ID_MAX + 1) *
181                             sizeof(struct sn_flush_device_list *), GFP_KERNEL);
182
183                 memset(hubdev->hdi_flush_nasid_list.widget_p, 0x0,
184                        (HUB_WIDGET_ID_MAX + 1) *
185                        sizeof(struct sn_flush_device_list *));
186
187                 for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
188                         sn_flush_device_list = kmalloc(DEV_PER_WIDGET *
189                                                        sizeof(struct
190                                                               sn_flush_device_list),
191                                                        GFP_KERNEL);
192                         memset(sn_flush_device_list, 0x0,
193                                DEV_PER_WIDGET *
194                                sizeof(struct sn_flush_device_list));
195
196                         status =
197                             sal_get_widget_dmaflush_list(nasid, widget,
198                                                          (uint64_t)
199                                                          __pa
200                                                          (sn_flush_device_list));
201                         if (status) {
202                                 kfree(sn_flush_device_list);
203                                 continue;
204                         }
205
206                         hubdev->hdi_flush_nasid_list.widget_p[widget] =
207                             sn_flush_device_list;
208                 }
209
210         }
211
212 }
213
214 void sn_pci_unfixup_slot(struct pci_dev *dev)
215 {
216         struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
217
218         sn_irq_unfixup(dev);
219         pci_dev_put(host_pci_dev);
220         pci_dev_put(dev);
221 }
222
223 /*
224  * sn_pci_fixup_slot() - This routine sets up a slot's resources
225  * consistent with the Linux PCI abstraction layer.  Resources acquired
226  * from our PCI provider include PIO maps to BAR space and interrupt
227  * objects.
228  */
229 void sn_pci_fixup_slot(struct pci_dev *dev)
230 {
231         int idx;
232         int segment = 0;
233         int status = 0;
234         struct pcibus_bussoft *bs;
235         struct pci_bus *host_pci_bus;
236         struct pci_dev *host_pci_dev;
237         struct sn_irq_info *sn_irq_info;
238         unsigned long size;
239         unsigned int bus_no, devfn;
240
241         pci_dev_get(dev); /* for the sysdata pointer */
242         dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
243         if (SN_PCIDEV_INFO(dev) <= 0)
244                 BUG();          /* Cannot afford to run out of memory */
245         memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
246
247         sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
248         if (sn_irq_info <= 0)
249                 BUG();          /* Cannot afford to run out of memory */
250         memset(sn_irq_info, 0, sizeof(struct sn_irq_info));
251
252         /* Call to retrieve pci device information needed by kernel. */
253         status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number, 
254                                      dev->devfn,
255                                      (u64) __pa(SN_PCIDEV_INFO(dev)),
256                                      (u64) __pa(sn_irq_info));
257         if (status)
258                 BUG(); /* Cannot get platform pci device information */
259
260         /* Copy over PIO Mapped Addresses */
261         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
262                 unsigned long start, end, addr;
263
264                 if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx])
265                         continue;
266
267                 start = dev->resource[idx].start;
268                 end = dev->resource[idx].end;
269                 size = end - start;
270                 addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx];
271                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
272                 dev->resource[idx].start = addr;
273                 dev->resource[idx].end = addr + size;
274                 if (dev->resource[idx].flags & IORESOURCE_IO)
275                         dev->resource[idx].parent = &ioport_resource;
276                 else
277                         dev->resource[idx].parent = &iomem_resource;
278         }
279
280         /*
281          * Using the PROMs values for the PCI host bus, get the Linux
282          * PCI host_pci_dev struct and set up host bus linkages
283          */
284
285         bus_no = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32;
286         devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
287         host_pci_bus = pci_find_bus(pci_domain_nr(dev->bus), bus_no);
288         host_pci_dev = pci_get_slot(host_pci_bus, devfn);
289
290         SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
291         SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
292                                                 SN_PCIDEV_INFO(host_pci_dev);
293         SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
294         bs = SN_PCIBUS_BUSSOFT(dev->bus);
295         SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
296
297         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
298                 SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
299         } else {
300                 SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
301         }
302
303         /* Only set up IRQ stuff if this device has a host bus context */
304         if (bs && sn_irq_info->irq_irq) {
305                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
306                 dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
307                 sn_irq_fixup(dev, sn_irq_info);
308         } else {
309                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
310                 kfree(sn_irq_info);
311         }
312 }
313
314 /*
315  * sn_pci_controller_fixup() - This routine sets up a bus's resources
316  * consistent with the Linux PCI abstraction layer.
317  */
318 void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
319 {
320         int status = 0;
321         int nasid, cnode;
322         struct pci_controller *controller;
323         struct pcibus_bussoft *prom_bussoft_ptr;
324         struct hubdev_info *hubdev_info;
325         void *provider_soft;
326         struct sn_pcibus_provider *provider;
327
328         status = sal_get_pcibus_info((u64) segment, (u64) busnum,
329                                      (u64) ia64_tpa(&prom_bussoft_ptr));
330         if (status > 0)
331                 return;         /*bus # does not exist */
332         prom_bussoft_ptr = __va(prom_bussoft_ptr);
333
334         controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
335         if (!controller)
336                 BUG();
337
338         if (bus == NULL) {
339                 bus = pci_scan_bus(busnum, &pci_root_ops, controller);
340                 if (bus == NULL)
341                         return; /* error, or bus already scanned */
342                 bus->sysdata = NULL;
343         }
344
345         if (bus->sysdata)
346                 goto error_return; /* sysdata already alloc'd */
347
348         /*
349          * Per-provider fixup.  Copies the contents from prom to local
350          * area and links SN_PCIBUS_BUSSOFT().
351          */
352
353         if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
354                 return;         /* unsupported asic type */
355
356         if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
357                 goto error_return; /* no further fixup necessary */
358
359         provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
360         if (provider == NULL)
361                 return;         /* no provider registerd for this asic */
362
363         provider_soft = NULL;
364         if (provider->bus_fixup)
365                 provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr);
366
367         if (provider_soft == NULL)
368                 return;         /* fixup failed or not applicable */
369
370         /*
371          * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
372          * after this point.
373          */
374
375         bus->sysdata = controller;
376         PCI_CONTROLLER(bus)->platform_data = provider_soft;
377         nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
378         cnode = nasid_to_cnodeid(nasid);
379         hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
380         SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
381             &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
382
383         return;
384
385 error_return:
386
387         kfree(controller);
388         return;
389 }
390
391 void sn_bus_store_sysdata(struct pci_dev *dev)
392 {
393         struct sysdata_el *element;
394
395         element = kcalloc(1, sizeof(struct sysdata_el), GFP_KERNEL);
396         if (!element) {
397                 dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
398                 return;
399         }
400         element->sysdata = dev->sysdata;
401         list_add(&element->entry, &sn_sysdata_list);
402 }
403
404 void sn_bus_free_sysdata(void)
405 {
406         struct sysdata_el *element;
407         struct list_head *list;
408
409 sn_sysdata_free_start:
410         list_for_each(list, &sn_sysdata_list) {
411                 element = list_entry(list, struct sysdata_el, entry);
412                 list_del(&element->entry);
413                 kfree(element->sysdata);
414                 kfree(element);
415                 goto sn_sysdata_free_start;
416         }
417         return;
418 }
419
420 /*
421  * Ugly hack to get PCI setup until we have a proper ACPI namespace.
422  */
423
424 #define PCI_BUSES_TO_SCAN 256
425
426 static int __init sn_pci_init(void)
427 {
428         int i = 0;
429         struct pci_dev *pci_dev = NULL;
430         extern void sn_init_cpei_timer(void);
431 #ifdef CONFIG_PROC_FS
432         extern void register_sn_procfs(void);
433 #endif
434
435         if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
436                 return 0;
437
438         /*
439          * prime sn_pci_provider[].  Individial provider init routines will
440          * override their respective default entries.
441          */
442
443         for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
444                 sn_pci_provider[i] = &sn_pci_default_provider;
445
446         pcibr_init_provider();
447         tioca_init_provider();
448
449         /*
450          * This is needed to avoid bounce limit checks in the blk layer
451          */
452         ia64_max_iommu_merge_mask = ~PAGE_MASK;
453         sn_fixup_ionodes();
454         sn_irq_lh_init();
455         INIT_LIST_HEAD(&sn_sysdata_list);
456         sn_init_cpei_timer();
457
458 #ifdef CONFIG_PROC_FS
459         register_sn_procfs();
460 #endif
461
462         /* busses are not known yet ... */
463         for (i = 0; i < PCI_BUSES_TO_SCAN; i++)
464                 sn_pci_controller_fixup(0, i, NULL);
465
466         /*
467          * Generic Linux PCI Layer has created the pci_bus and pci_dev 
468          * structures - time for us to add our SN PLatform specific 
469          * information.
470          */
471
472         while ((pci_dev =
473                 pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
474                 sn_pci_fixup_slot(pci_dev);
475
476         sn_ioif_inited = 1;     /* sn I/O infrastructure now initialized */
477
478         return 0;
479 }
480
481 /*
482  * hubdev_init_node() - Creates the HUB data structure and link them to it's 
483  *      own NODE specific data area.
484  */
485 void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
486 {
487
488         struct hubdev_info *hubdev_info;
489
490         if (node >= num_online_nodes()) /* Headless/memless IO nodes */
491                 hubdev_info =
492                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(0),
493                                                              sizeof(struct
494                                                                     hubdev_info));
495         else
496                 hubdev_info =
497                     (struct hubdev_info *)alloc_bootmem_node(NODE_DATA(node),
498                                                              sizeof(struct
499                                                                     hubdev_info));
500         npda->pdinfo = (void *)hubdev_info;
501
502 }
503
504 geoid_t
505 cnodeid_get_geoid(cnodeid_t cnode)
506 {
507
508         struct hubdev_info *hubdev;
509
510         hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
511         return hubdev->hdi_geoid;
512
513 }
514
515 subsys_initcall(sn_pci_init);
516 EXPORT_SYMBOL(sn_pci_fixup_slot);
517 EXPORT_SYMBOL(sn_pci_unfixup_slot);
518 EXPORT_SYMBOL(sn_pci_controller_fixup);
519 EXPORT_SYMBOL(sn_bus_store_sysdata);
520 EXPORT_SYMBOL(sn_bus_free_sysdata);