Commit | Line | Data |
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1da177e4 LT |
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 | * | |
8ea6091f | 6 | * Copyright (C) 1992 - 1997, 2000-2006 Silicon Graphics, Inc. All rights reserved. |
1da177e4 LT |
7 | */ |
8 | ||
5a0e3ad6 | 9 | #include <linux/slab.h> |
bd3ff194 | 10 | #include <linux/export.h> |
1da177e4 | 11 | #include <asm/sn/types.h> |
1da177e4 | 12 | #include <asm/sn/addrs.h> |
1da177e4 | 13 | #include <asm/sn/io.h> |
f90aa8c4 | 14 | #include <asm/sn/module.h> |
8ea6091f | 15 | #include <asm/sn/intr.h> |
c13cf371 PB |
16 | #include <asm/sn/pcibus_provider_defs.h> |
17 | #include <asm/sn/pcidev.h> | |
c13cf371 | 18 | #include <asm/sn/sn_sal.h> |
c13cf371 | 19 | #include "xtalk/hubdev.h" |
674c6479 | 20 | |
e955d825 | 21 | /* |
8ea6091f JK |
22 | * The code in this file will only be executed when running with |
23 | * a PROM that does _not_ have base ACPI IO support. | |
24 | * (i.e., SN_ACPI_BASE_SUPPORT() == 0) | |
e955d825 MM |
25 | */ |
26 | ||
8ea6091f JK |
27 | static int max_segment_number; /* Default highest segment number */ |
28 | static int max_pcibus_number = 255; /* Default highest pci bus number */ | |
1da177e4 | 29 | |
1da177e4 LT |
30 | |
31 | /* | |
32 | * Retrieve the hub device info structure for the given nasid. | |
33 | */ | |
6d6e4200 | 34 | static inline u64 sal_get_hubdev_info(u64 handle, u64 address) |
1da177e4 | 35 | { |
1da177e4 LT |
36 | struct ia64_sal_retval ret_stuff; |
37 | ret_stuff.status = 0; | |
38 | ret_stuff.v0 = 0; | |
39 | ||
40 | SAL_CALL_NOLOCK(ret_stuff, | |
41 | (u64) SN_SAL_IOIF_GET_HUBDEV_INFO, | |
42 | (u64) handle, (u64) address, 0, 0, 0, 0, 0); | |
43 | return ret_stuff.v0; | |
44 | } | |
45 | ||
46 | /* | |
47 | * Retrieve the pci bus information given the bus number. | |
48 | */ | |
6d6e4200 | 49 | static inline u64 sal_get_pcibus_info(u64 segment, u64 busnum, u64 address) |
1da177e4 | 50 | { |
1da177e4 LT |
51 | struct ia64_sal_retval ret_stuff; |
52 | ret_stuff.status = 0; | |
53 | ret_stuff.v0 = 0; | |
54 | ||
55 | SAL_CALL_NOLOCK(ret_stuff, | |
56 | (u64) SN_SAL_IOIF_GET_PCIBUS_INFO, | |
57 | (u64) segment, (u64) busnum, (u64) address, 0, 0, 0, 0); | |
58 | return ret_stuff.v0; | |
59 | } | |
60 | ||
6f09a925 JK |
61 | /* |
62 | * Retrieve the pci device information given the bus and device|function number. | |
63 | */ | |
64 | static inline u64 | |
65 | sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev, | |
66 | u64 sn_irq_info) | |
67 | { | |
68 | struct ia64_sal_retval ret_stuff; | |
69 | ret_stuff.status = 0; | |
70 | ret_stuff.v0 = 0; | |
71 | ||
72 | SAL_CALL_NOLOCK(ret_stuff, | |
73 | (u64) SN_SAL_IOIF_GET_PCIDEV_INFO, | |
74 | (u64) segment, (u64) bus_number, (u64) devfn, | |
75 | (u64) pci_dev, | |
76 | sn_irq_info, 0, 0); | |
77 | return ret_stuff.v0; | |
78 | } | |
79 | ||
5f7f5b0c | 80 | |
1da177e4 | 81 | /* |
8ea6091f JK |
82 | * sn_fixup_ionodes() - This routine initializes the HUB data structure for |
83 | * each node in the system. This function is only | |
84 | * executed when running with a non-ACPI capable PROM. | |
1da177e4 | 85 | */ |
2fcc3db0 | 86 | static void __init sn_fixup_ionodes(void) |
1da177e4 | 87 | { |
8ea6091f | 88 | |
1da177e4 | 89 | struct hubdev_info *hubdev; |
6d6e4200 PB |
90 | u64 status; |
91 | u64 nasid; | |
8ea6091f JK |
92 | int i; |
93 | extern void sn_common_hubdev_init(struct hubdev_info *); | |
1da177e4 | 94 | |
674c6479 CN |
95 | /* |
96 | * Get SGI Specific HUB chipset information. | |
97 | * Inform Prom that this kernel can support domain bus numbering. | |
98 | */ | |
24ee0a6d | 99 | for (i = 0; i < num_cnodes; i++) { |
1da177e4 LT |
100 | hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo); |
101 | nasid = cnodeid_to_nasid(i); | |
674c6479 CN |
102 | hubdev->max_segment_number = 0xffffffff; |
103 | hubdev->max_pcibus_number = 0xff; | |
6d6e4200 | 104 | status = sal_get_hubdev_info(nasid, (u64) __pa(hubdev)); |
1da177e4 LT |
105 | if (status) |
106 | continue; | |
107 | ||
674c6479 CN |
108 | /* Save the largest Domain and pcibus numbers found. */ |
109 | if (hubdev->max_segment_number) { | |
110 | /* | |
111 | * Dealing with a Prom that supports segments. | |
112 | */ | |
113 | max_segment_number = hubdev->max_segment_number; | |
114 | max_pcibus_number = hubdev->max_pcibus_number; | |
115 | } | |
8ea6091f JK |
116 | sn_common_hubdev_init(hubdev); |
117 | } | |
118 | } | |
674c6479 | 119 | |
8ea6091f | 120 | /* |
2ead66b5 | 121 | * sn_pci_legacy_window_fixup - Setup PCI resources for |
8ea6091f JK |
122 | * legacy IO and MEM space. This needs to |
123 | * be done here, as the PROM does not have | |
124 | * ACPI support defining the root buses | |
125 | * and their resources (_CRS), | |
126 | */ | |
127 | static void | |
2ead66b5 YW |
128 | sn_legacy_pci_window_fixup(struct resource *res, |
129 | u64 legacy_io, u64 legacy_mem) | |
8ea6091f | 130 | { |
2ead66b5 YW |
131 | res[0].name = "legacy_io"; |
132 | res[0].flags = IORESOURCE_IO; | |
133 | res[0].start = legacy_io; | |
134 | res[0].end = res[0].start + 0xffff; | |
135 | res[0].parent = &ioport_resource; | |
136 | res[1].name = "legacy_mem"; | |
137 | res[1].flags = IORESOURCE_MEM; | |
138 | res[1].start = legacy_mem; | |
139 | res[1].end = res[1].start + (1024 * 1024) - 1; | |
140 | res[1].parent = &iomem_resource; | |
1da177e4 LT |
141 | } |
142 | ||
143 | /* | |
6f09a925 | 144 | * sn_io_slot_fixup() - We are not running with an ACPI capable PROM, |
8ea6091f JK |
145 | * and need to convert the pci_dev->resource |
146 | * 'start' and 'end' addresses to mapped addresses, | |
147 | * and setup the pci_controller->window array entries. | |
1da177e4 | 148 | */ |
8ea6091f | 149 | void |
6f09a925 | 150 | sn_io_slot_fixup(struct pci_dev *dev) |
1da177e4 LT |
151 | { |
152 | int idx; | |
ab97b8cc BH |
153 | struct resource *res; |
154 | unsigned long addr, size; | |
6f09a925 JK |
155 | struct pcidev_info *pcidev_info; |
156 | struct sn_irq_info *sn_irq_info; | |
157 | int status; | |
158 | ||
159 | pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL); | |
160 | if (!pcidev_info) | |
d4ed8084 | 161 | panic("%s: Unable to alloc memory for pcidev_info", __func__); |
6f09a925 JK |
162 | |
163 | sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL); | |
164 | if (!sn_irq_info) | |
d4ed8084 | 165 | panic("%s: Unable to alloc memory for sn_irq_info", __func__); |
6f09a925 JK |
166 | |
167 | /* Call to retrieve pci device information needed by kernel. */ | |
168 | status = sal_get_pcidev_info((u64) pci_domain_nr(dev), | |
169 | (u64) dev->bus->number, | |
170 | dev->devfn, | |
171 | (u64) __pa(pcidev_info), | |
172 | (u64) __pa(sn_irq_info)); | |
173 | ||
80a03e29 | 174 | BUG_ON(status); /* Cannot get platform pci device information */ |
6f09a925 | 175 | |
3ec829b6 | 176 | |
1da177e4 LT |
177 | /* Copy over PIO Mapped Addresses */ |
178 | for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) { | |
ab97b8cc | 179 | if (!pcidev_info->pdi_pio_mapped_addr[idx]) |
1da177e4 LT |
180 | continue; |
181 | ||
ab97b8cc BH |
182 | res = &dev->resource[idx]; |
183 | ||
184 | size = res->end - res->start; | |
185 | if (size == 0) | |
3ec829b6 | 186 | continue; |
ab97b8cc | 187 | |
240504ad | 188 | res->start = pcidev_info->pdi_pio_mapped_addr[idx]; |
ab97b8cc | 189 | res->end = addr + size; |
64715725 BW |
190 | |
191 | /* | |
192 | * if it's already in the device structure, remove it before | |
193 | * inserting | |
194 | */ | |
ab97b8cc BH |
195 | if (res->parent && res->parent->child) |
196 | release_resource(res); | |
64715725 | 197 | |
ab97b8cc BH |
198 | if (res->flags & IORESOURCE_IO) |
199 | insert_resource(&ioport_resource, res); | |
1da177e4 | 200 | else |
ab97b8cc | 201 | insert_resource(&iomem_resource, res); |
d7ad2254 | 202 | /* |
240504ad | 203 | * If ROM, mark as shadowed in PROM. |
d7ad2254 JK |
204 | */ |
205 | if (idx == PCI_ROM_RESOURCE) { | |
240504ad BH |
206 | pci_disable_rom(dev); |
207 | res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW | | |
208 | IORESOURCE_PCI_FIXED; | |
d7ad2254 | 209 | } |
1da177e4 | 210 | } |
6f09a925 JK |
211 | |
212 | sn_pci_fixup_slot(dev, pcidev_info, sn_irq_info); | |
1da177e4 | 213 | } |
6f09a925 JK |
214 | EXPORT_SYMBOL(sn_io_slot_fixup); |
215 | ||
1da177e4 LT |
216 | /* |
217 | * sn_pci_controller_fixup() - This routine sets up a bus's resources | |
8ea6091f | 218 | * consistent with the Linux PCI abstraction layer. |
1da177e4 | 219 | */ |
d3a307f3 | 220 | static void __init |
8ea6091f | 221 | sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) |
1da177e4 | 222 | { |
8ea6091f | 223 | s64 status = 0; |
1da177e4 LT |
224 | struct pci_controller *controller; |
225 | struct pcibus_bussoft *prom_bussoft_ptr; | |
2ead66b5 | 226 | struct resource *res; |
f920b55d | 227 | LIST_HEAD(resources); |
1da177e4 | 228 | |
6f354b01 PB |
229 | status = sal_get_pcibus_info((u64) segment, (u64) busnum, |
230 | (u64) ia64_tpa(&prom_bussoft_ptr)); | |
231 | if (status > 0) | |
232 | return; /*bus # does not exist */ | |
1da177e4 | 233 | prom_bussoft_ptr = __va(prom_bussoft_ptr); |
1da177e4 | 234 | |
8ea6091f | 235 | controller = kzalloc(sizeof(*controller), GFP_KERNEL); |
80a03e29 | 236 | BUG_ON(!controller); |
674c6479 | 237 | controller->segment = segment; |
6f354b01 | 238 | |
2ead66b5 YW |
239 | res = kcalloc(2, sizeof(struct resource), GFP_KERNEL); |
240 | BUG_ON(!res); | |
241 | ||
1da177e4 | 242 | /* |
8ea6091f JK |
243 | * Temporarily save the prom_bussoft_ptr for use by sn_bus_fixup(). |
244 | * (platform_data will be overwritten later in sn_common_bus_fixup()) | |
1da177e4 | 245 | */ |
8ea6091f | 246 | controller->platform_data = prom_bussoft_ptr; |
1da177e4 | 247 | |
2ead66b5 YW |
248 | sn_legacy_pci_window_fixup(res, |
249 | prom_bussoft_ptr->bs_legacy_io, | |
250 | prom_bussoft_ptr->bs_legacy_mem); | |
251 | pci_add_resource_offset(&resources, &res[0], | |
252 | prom_bussoft_ptr->bs_legacy_io); | |
253 | pci_add_resource_offset(&resources, &res[1], | |
254 | prom_bussoft_ptr->bs_legacy_mem); | |
255 | ||
f920b55d BH |
256 | bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, controller, |
257 | &resources); | |
862f0012 LT |
258 | if (bus == NULL) { |
259 | kfree(res); | |
a649dbfe | 260 | kfree(controller); |
b97ea289 | 261 | return; |
862f0012 | 262 | } |
b97ea289 | 263 | pci_bus_add_devices(bus); |
6f354b01 PB |
264 | } |
265 | ||
8ea6091f JK |
266 | /* |
267 | * sn_bus_fixup | |
268 | */ | |
269 | void | |
270 | sn_bus_fixup(struct pci_bus *bus) | |
6f354b01 | 271 | { |
8ea6091f JK |
272 | struct pci_dev *pci_dev = NULL; |
273 | struct pcibus_bussoft *prom_bussoft_ptr; | |
8ea6091f JK |
274 | |
275 | if (!bus->parent) { /* If root bus */ | |
276 | prom_bussoft_ptr = PCI_CONTROLLER(bus)->platform_data; | |
277 | if (prom_bussoft_ptr == NULL) { | |
278 | printk(KERN_ERR | |
279 | "sn_bus_fixup: 0x%04x:0x%02x Unable to " | |
280 | "obtain prom_bussoft_ptr\n", | |
281 | pci_domain_nr(bus), bus->number); | |
282 | return; | |
283 | } | |
284 | sn_common_bus_fixup(bus, prom_bussoft_ptr); | |
8ea6091f JK |
285 | } |
286 | list_for_each_entry(pci_dev, &bus->devices, bus_list) { | |
6f09a925 | 287 | sn_io_slot_fixup(pci_dev); |
8ea6091f | 288 | } |
6f354b01 | 289 | |
1da177e4 LT |
290 | } |
291 | ||
292 | /* | |
8ea6091f JK |
293 | * sn_io_init - PROM does not have ACPI support to define nodes or root buses, |
294 | * so we need to do things the hard way, including initiating the | |
295 | * bus scanning ourselves. | |
1da177e4 LT |
296 | */ |
297 | ||
8ea6091f | 298 | void __init sn_io_init(void) |
1da177e4 | 299 | { |
8ed9b2c7 | 300 | int i, j; |
e955d825 | 301 | |
1da177e4 | 302 | sn_fixup_ionodes(); |
1da177e4 | 303 | |
6f354b01 | 304 | /* busses are not known yet ... */ |
674c6479 CN |
305 | for (i = 0; i <= max_segment_number; i++) |
306 | for (j = 0; j <= max_pcibus_number; j++) | |
307 | sn_pci_controller_fixup(i, j, NULL); | |
1da177e4 | 308 | } |