pci_64.c (8a517c514d5893602cf85c1b4c47afbbc04d2198) pci_64.c (fbe65447197789a3ccccc27755956f6a4c445089)
1/*
2 * Port for PPC64 David Engebretsen, IBM Corp.
3 * Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
4 *
5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
6 * Rework, based on alpha PCI code.
7 *
8 * This program is free software; you can redistribute it and/or

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38 * This is the lowest I/O base address (so bar values are always positive),
39 * and it *must* be the start of ISA space if an ISA bus exists because
40 * ISA drivers use hard coded offsets. If no ISA bus exists nothing
41 * is mapped on the first 64K of IO space
42 */
43unsigned long pci_io_base = ISA_IO_BASE;
44EXPORT_SYMBOL(pci_io_base);
45
1/*
2 * Port for PPC64 David Engebretsen, IBM Corp.
3 * Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
4 *
5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
6 * Rework, based on alpha PCI code.
7 *
8 * This program is free software; you can redistribute it and/or

--- 29 unchanged lines hidden (view full) ---

38 * This is the lowest I/O base address (so bar values are always positive),
39 * and it *must* be the start of ISA space if an ISA bus exists because
40 * ISA drivers use hard coded offsets. If no ISA bus exists nothing
41 * is mapped on the first 64K of IO space
42 */
43unsigned long pci_io_base = ISA_IO_BASE;
44EXPORT_SYMBOL(pci_io_base);
45
46static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
47{
48 const u32 *prop;
49 int len;
50
51 prop = of_get_property(np, name, &len);
52 if (prop && len >= 4)
53 return *prop;
54 return def;
55}
56
57static unsigned int pci_parse_of_flags(u32 addr0, int bridge)
58{
59 unsigned int flags = 0;
60
61 if (addr0 & 0x02000000) {
62 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
63 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
64 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
65 if (addr0 & 0x40000000)
66 flags |= IORESOURCE_PREFETCH
67 | PCI_BASE_ADDRESS_MEM_PREFETCH;
68 /* Note: We don't know whether the ROM has been left enabled
69 * by the firmware or not. We mark it as disabled (ie, we do
70 * not set the IORESOURCE_ROM_ENABLE flag) for now rather than
71 * do a config space read, it will be force-enabled if needed
72 */
73 if (!bridge && (addr0 & 0xff) == 0x30)
74 flags |= IORESOURCE_READONLY;
75 } else if (addr0 & 0x01000000)
76 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
77 if (flags)
78 flags |= IORESOURCE_SIZEALIGN;
79 return flags;
80}
81
82
83static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev)
84{
85 u64 base, size;
86 unsigned int flags;
87 struct resource *res;
88 const u32 *addrs;
89 u32 i;
90 int proplen;
91
92 addrs = of_get_property(node, "assigned-addresses", &proplen);
93 if (!addrs)
94 return;
95 pr_debug(" parse addresses (%d bytes) @ %p\n", proplen, addrs);
96 for (; proplen >= 20; proplen -= 20, addrs += 5) {
97 flags = pci_parse_of_flags(addrs[0], 0);
98 if (!flags)
99 continue;
100 base = of_read_number(&addrs[1], 2);
101 size = of_read_number(&addrs[3], 2);
102 if (!size)
103 continue;
104 i = addrs[0] & 0xff;
105 pr_debug(" base: %llx, size: %llx, i: %x\n",
106 (unsigned long long)base,
107 (unsigned long long)size, i);
108
109 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
110 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
111 } else if (i == dev->rom_base_reg) {
112 res = &dev->resource[PCI_ROM_RESOURCE];
113 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
114 } else {
115 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
116 continue;
117 }
118 res->start = base;
119 res->end = base + size - 1;
120 res->flags = flags;
121 res->name = pci_name(dev);
122 }
123}
124
125struct pci_dev *of_create_pci_dev(struct device_node *node,
126 struct pci_bus *bus, int devfn)
127{
128 struct pci_dev *dev;
129 const char *type;
130
131 dev = alloc_pci_dev();
132 if (!dev)
133 return NULL;
134 type = of_get_property(node, "device_type", NULL);
135 if (type == NULL)
136 type = "";
137
138 pr_debug(" create device, devfn: %x, type: %s\n", devfn, type);
139
140 dev->bus = bus;
141 dev->sysdata = node;
142 dev->dev.parent = bus->bridge;
143 dev->dev.bus = &pci_bus_type;
144 dev->devfn = devfn;
145 dev->multifunction = 0; /* maybe a lie? */
146
147 dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
148 dev->device = get_int_prop(node, "device-id", 0xffff);
149 dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0);
150 dev->subsystem_device = get_int_prop(node, "subsystem-id", 0);
151
152 dev->cfg_size = pci_cfg_space_size(dev);
153
154 dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus),
155 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
156 dev->class = get_int_prop(node, "class-code", 0);
157 dev->revision = get_int_prop(node, "revision-id", 0);
158
159 pr_debug(" class: 0x%x\n", dev->class);
160 pr_debug(" revision: 0x%x\n", dev->revision);
161
162 dev->current_state = 4; /* unknown power state */
163 dev->error_state = pci_channel_io_normal;
164 dev->dma_mask = 0xffffffff;
165
166 if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
167 /* a PCI-PCI bridge */
168 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
169 dev->rom_base_reg = PCI_ROM_ADDRESS1;
170 } else if (!strcmp(type, "cardbus")) {
171 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
172 } else {
173 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
174 dev->rom_base_reg = PCI_ROM_ADDRESS;
175 /* Maybe do a default OF mapping here */
176 dev->irq = NO_IRQ;
177 }
178
179 pci_parse_of_addrs(node, dev);
180
181 pr_debug(" adding to system ...\n");
182
183 pci_device_add(dev, bus);
184
185 return dev;
186}
187EXPORT_SYMBOL(of_create_pci_dev);
188
189static void __devinit __of_scan_bus(struct device_node *node,
190 struct pci_bus *bus, int rescan_existing)
191{
192 struct device_node *child;
193 const u32 *reg;
194 int reglen, devfn;
195 struct pci_dev *dev;
196
197 pr_debug("of_scan_bus(%s) bus no %d... \n",
198 node->full_name, bus->number);
199
200 /* Scan direct children */
201 for_each_child_of_node(node, child) {
202 pr_debug(" * %s\n", child->full_name);
203 reg = of_get_property(child, "reg", &reglen);
204 if (reg == NULL || reglen < 20)
205 continue;
206 devfn = (reg[0] >> 8) & 0xff;
207
208 /* create a new pci_dev for this device */
209 dev = of_create_pci_dev(child, bus, devfn);
210 if (!dev)
211 continue;
212 pr_debug(" dev header type: %x\n", dev->hdr_type);
213 }
214
215 /* Apply all fixups necessary. We don't fixup the bus "self"
216 * for an existing bridge that is being rescanned
217 */
218 if (!rescan_existing)
219 pcibios_setup_bus_self(bus);
220 pcibios_setup_bus_devices(bus);
221
222 /* Now scan child busses */
223 list_for_each_entry(dev, &bus->devices, bus_list) {
224 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
225 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
226 struct device_node *child = pci_device_to_OF_node(dev);
227 if (dev)
228 of_scan_pci_bridge(child, dev);
229 }
230 }
231}
232
233void __devinit of_scan_bus(struct device_node *node,
234 struct pci_bus *bus)
235{
236 __of_scan_bus(node, bus, 0);
237}
238EXPORT_SYMBOL_GPL(of_scan_bus);
239
240void __devinit of_rescan_bus(struct device_node *node,
241 struct pci_bus *bus)
242{
243 __of_scan_bus(node, bus, 1);
244}
245EXPORT_SYMBOL_GPL(of_rescan_bus);
246
247void __devinit of_scan_pci_bridge(struct device_node *node,
248 struct pci_dev *dev)
249{
250 struct pci_bus *bus;
251 const u32 *busrange, *ranges;
252 int len, i, mode;
253 struct resource *res;
254 unsigned int flags;
255 u64 size;
256
257 pr_debug("of_scan_pci_bridge(%s)\n", node->full_name);
258
259 /* parse bus-range property */
260 busrange = of_get_property(node, "bus-range", &len);
261 if (busrange == NULL || len != 8) {
262 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
263 node->full_name);
264 return;
265 }
266 ranges = of_get_property(node, "ranges", &len);
267 if (ranges == NULL) {
268 printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n",
269 node->full_name);
270 return;
271 }
272
273 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
274 if (!bus) {
275 printk(KERN_ERR "Failed to create pci bus for %s\n",
276 node->full_name);
277 return;
278 }
279
280 bus->primary = dev->bus->number;
281 bus->subordinate = busrange[1];
282 bus->bridge_ctl = 0;
283 bus->sysdata = node;
284
285 /* parse ranges property */
286 /* PCI #address-cells == 3 and #size-cells == 2 always */
287 res = &dev->resource[PCI_BRIDGE_RESOURCES];
288 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
289 res->flags = 0;
290 bus->resource[i] = res;
291 ++res;
292 }
293 i = 1;
294 for (; len >= 32; len -= 32, ranges += 8) {
295 flags = pci_parse_of_flags(ranges[0], 1);
296 size = of_read_number(&ranges[6], 2);
297 if (flags == 0 || size == 0)
298 continue;
299 if (flags & IORESOURCE_IO) {
300 res = bus->resource[0];
301 if (res->flags) {
302 printk(KERN_ERR "PCI: ignoring extra I/O range"
303 " for bridge %s\n", node->full_name);
304 continue;
305 }
306 } else {
307 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
308 printk(KERN_ERR "PCI: too many memory ranges"
309 " for bridge %s\n", node->full_name);
310 continue;
311 }
312 res = bus->resource[i];
313 ++i;
314 }
315 res->start = of_read_number(&ranges[1], 2);
316 res->end = res->start + size - 1;
317 res->flags = flags;
318 }
319 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
320 bus->number);
321 pr_debug(" bus name: %s\n", bus->name);
322
323 mode = PCI_PROBE_NORMAL;
324 if (ppc_md.pci_probe_mode)
325 mode = ppc_md.pci_probe_mode(bus);
326 pr_debug(" probe mode: %d\n", mode);
327
328 if (mode == PCI_PROBE_DEVTREE)
329 of_scan_bus(node, bus);
330 else if (mode == PCI_PROBE_NORMAL)
331 pci_scan_child_bus(bus);
332}
333EXPORT_SYMBOL(of_scan_pci_bridge);
334
335void __devinit scan_phb(struct pci_controller *hose)
336{
337 struct pci_bus *bus;
338 struct device_node *node = hose->dn;
339 int mode;
340
341 pr_debug("PCI: Scanning PHB %s\n",
342 node ? node->full_name : "<NO NAME>");

--- 254 unchanged lines hidden --- 		46void __devinit scan_phb(struct pci_controller *hose)
47{
48 struct pci_bus *bus;
49 struct device_node *node = hose->dn;
50 int mode;
51
52 pr_debug("PCI: Scanning PHB %s\n",
53 node ? node->full_name : "<NO NAME>");

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