blob: b91d7f1461758ba759413042c1529faf4196912b [file] [log] [blame]
David S. Millera2fb23a2007-02-28 23:35:04 -08001/* pci.c: UltraSparc PCI controller support.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 *
3 * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
4 * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
David S. Millera2fb23a2007-02-28 23:35:04 -08006 *
7 * OF tree based PCI bus probing taken from the PowerPC port
8 * with minor modifications, see there for credits.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 */
10
Paul Gortmaker066bcac2011-07-22 13:18:16 -040011#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/kernel.h>
13#include <linux/string.h>
14#include <linux/sched.h>
15#include <linux/capability.h>
16#include <linux/errno.h>
David S. Millerc57c2ff2007-05-08 00:43:56 -070017#include <linux/pci.h>
David S. Miller35a17eb2007-02-10 17:41:02 -080018#include <linux/msi.h>
19#include <linux/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/init.h>
David S. Miller356d1642008-08-30 00:36:11 -070021#include <linux/of.h>
22#include <linux/of_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
24#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <asm/pgtable.h>
26#include <asm/irq.h>
David S. Millere87dc352006-06-21 18:18:47 -070027#include <asm/prom.h>
David S. Miller01f94c42007-03-04 12:53:19 -080028#include <asm/apb.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
David S. Miller1e8a8cc2007-02-28 23:38:38 -080030#include "pci_impl.h"
Sam Ravnborg4ac7b8262014-05-16 23:25:58 +020031#include "kernel.h"
David S. Miller1e8a8cc2007-02-28 23:38:38 -080032
Linus Torvalds1da177e2005-04-16 15:20:36 -070033/* List of all PCI controllers found in the system. */
David S. Miller34768bc2007-05-07 23:06:27 -070034struct pci_pbm_info *pci_pbm_root = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
David S. Miller6c108f12007-05-07 23:49:01 -070036/* Each PBM found gets a unique index. */
37int pci_num_pbms = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
Linus Torvalds1da177e2005-04-16 15:20:36 -070039volatile int pci_poke_in_progress;
40volatile int pci_poke_cpu = -1;
41volatile int pci_poke_faulted;
42
43static DEFINE_SPINLOCK(pci_poke_lock);
44
45void pci_config_read8(u8 *addr, u8 *ret)
46{
47 unsigned long flags;
48 u8 byte;
49
50 spin_lock_irqsave(&pci_poke_lock, flags);
51 pci_poke_cpu = smp_processor_id();
52 pci_poke_in_progress = 1;
53 pci_poke_faulted = 0;
54 __asm__ __volatile__("membar #Sync\n\t"
55 "lduba [%1] %2, %0\n\t"
56 "membar #Sync"
57 : "=r" (byte)
58 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
59 : "memory");
60 pci_poke_in_progress = 0;
61 pci_poke_cpu = -1;
62 if (!pci_poke_faulted)
63 *ret = byte;
64 spin_unlock_irqrestore(&pci_poke_lock, flags);
65}
66
67void pci_config_read16(u16 *addr, u16 *ret)
68{
69 unsigned long flags;
70 u16 word;
71
72 spin_lock_irqsave(&pci_poke_lock, flags);
73 pci_poke_cpu = smp_processor_id();
74 pci_poke_in_progress = 1;
75 pci_poke_faulted = 0;
76 __asm__ __volatile__("membar #Sync\n\t"
77 "lduha [%1] %2, %0\n\t"
78 "membar #Sync"
79 : "=r" (word)
80 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
81 : "memory");
82 pci_poke_in_progress = 0;
83 pci_poke_cpu = -1;
84 if (!pci_poke_faulted)
85 *ret = word;
86 spin_unlock_irqrestore(&pci_poke_lock, flags);
87}
88
89void pci_config_read32(u32 *addr, u32 *ret)
90{
91 unsigned long flags;
92 u32 dword;
93
94 spin_lock_irqsave(&pci_poke_lock, flags);
95 pci_poke_cpu = smp_processor_id();
96 pci_poke_in_progress = 1;
97 pci_poke_faulted = 0;
98 __asm__ __volatile__("membar #Sync\n\t"
99 "lduwa [%1] %2, %0\n\t"
100 "membar #Sync"
101 : "=r" (dword)
102 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
103 : "memory");
104 pci_poke_in_progress = 0;
105 pci_poke_cpu = -1;
106 if (!pci_poke_faulted)
107 *ret = dword;
108 spin_unlock_irqrestore(&pci_poke_lock, flags);
109}
110
111void pci_config_write8(u8 *addr, u8 val)
112{
113 unsigned long flags;
114
115 spin_lock_irqsave(&pci_poke_lock, flags);
116 pci_poke_cpu = smp_processor_id();
117 pci_poke_in_progress = 1;
118 pci_poke_faulted = 0;
119 __asm__ __volatile__("membar #Sync\n\t"
120 "stba %0, [%1] %2\n\t"
121 "membar #Sync"
122 : /* no outputs */
123 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
124 : "memory");
125 pci_poke_in_progress = 0;
126 pci_poke_cpu = -1;
127 spin_unlock_irqrestore(&pci_poke_lock, flags);
128}
129
130void pci_config_write16(u16 *addr, u16 val)
131{
132 unsigned long flags;
133
134 spin_lock_irqsave(&pci_poke_lock, flags);
135 pci_poke_cpu = smp_processor_id();
136 pci_poke_in_progress = 1;
137 pci_poke_faulted = 0;
138 __asm__ __volatile__("membar #Sync\n\t"
139 "stha %0, [%1] %2\n\t"
140 "membar #Sync"
141 : /* no outputs */
142 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
143 : "memory");
144 pci_poke_in_progress = 0;
145 pci_poke_cpu = -1;
146 spin_unlock_irqrestore(&pci_poke_lock, flags);
147}
148
149void pci_config_write32(u32 *addr, u32 val)
150{
151 unsigned long flags;
152
153 spin_lock_irqsave(&pci_poke_lock, flags);
154 pci_poke_cpu = smp_processor_id();
155 pci_poke_in_progress = 1;
156 pci_poke_faulted = 0;
157 __asm__ __volatile__("membar #Sync\n\t"
158 "stwa %0, [%1] %2\n\t"
159 "membar #Sync"
160 : /* no outputs */
161 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
162 : "memory");
163 pci_poke_in_progress = 0;
164 pci_poke_cpu = -1;
165 spin_unlock_irqrestore(&pci_poke_lock, flags);
166}
167
David S. Miller5840fc62007-05-22 01:24:14 -0700168static int ofpci_verbose;
169
170static int __init ofpci_debug(char *str)
171{
172 int val = 0;
173
174 get_option(&str, &val);
175 if (val)
176 ofpci_verbose = 1;
177 return 1;
178}
179
180__setup("ofpci_debug=", ofpci_debug);
181
David S. Millera2fb23a2007-02-28 23:35:04 -0800182static unsigned long pci_parse_of_flags(u32 addr0)
183{
184 unsigned long flags = 0;
185
186 if (addr0 & 0x02000000) {
187 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
188 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
189 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
190 if (addr0 & 0x40000000)
191 flags |= IORESOURCE_PREFETCH
192 | PCI_BASE_ADDRESS_MEM_PREFETCH;
193 } else if (addr0 & 0x01000000)
194 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
195 return flags;
196}
197
198/* The of_device layer has translated all of the assigned-address properties
199 * into physical address resources, we only have to figure out the register
200 * mapping.
201 */
Grant Likelycd4cd732010-07-22 16:04:30 -0600202static void pci_parse_of_addrs(struct platform_device *op,
David S. Millera2fb23a2007-02-28 23:35:04 -0800203 struct device_node *node,
204 struct pci_dev *dev)
205{
206 struct resource *op_res;
207 const u32 *addrs;
208 int proplen;
209
210 addrs = of_get_property(node, "assigned-addresses", &proplen);
211 if (!addrs)
212 return;
David S. Miller5840fc62007-05-22 01:24:14 -0700213 if (ofpci_verbose)
214 printk(" parse addresses (%d bytes) @ %p\n",
215 proplen, addrs);
David S. Millera2fb23a2007-02-28 23:35:04 -0800216 op_res = &op->resource[0];
217 for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {
218 struct resource *res;
219 unsigned long flags;
220 int i;
221
222 flags = pci_parse_of_flags(addrs[0]);
223 if (!flags)
224 continue;
225 i = addrs[0] & 0xff;
David S. Miller5840fc62007-05-22 01:24:14 -0700226 if (ofpci_verbose)
Sam Ravnborg90181132009-01-06 13:19:28 -0800227 printk(" start: %llx, end: %llx, i: %x\n",
David S. Miller5840fc62007-05-22 01:24:14 -0700228 op_res->start, op_res->end, i);
David S. Millera2fb23a2007-02-28 23:35:04 -0800229
230 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
231 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
232 } else if (i == dev->rom_base_reg) {
233 res = &dev->resource[PCI_ROM_RESOURCE];
Dan Williams92b19ff2015-08-10 23:07:06 -0400234 flags |= IORESOURCE_READONLY | IORESOURCE_SIZEALIGN;
David S. Millera2fb23a2007-02-28 23:35:04 -0800235 } else {
236 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
237 continue;
238 }
239 res->start = op_res->start;
240 res->end = op_res->end;
241 res->flags = flags;
242 res->name = pci_name(dev);
243 }
244}
245
David S. Miller77d10d02008-09-11 23:57:40 -0700246static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
247 struct device_node *node,
248 struct pci_bus *bus, int devfn)
David S. Millera2fb23a2007-02-28 23:35:04 -0800249{
250 struct dev_archdata *sd;
Grant Likelycd4cd732010-07-22 16:04:30 -0600251 struct platform_device *op;
David S. Millera2fb23a2007-02-28 23:35:04 -0800252 struct pci_dev *dev;
253 const char *type;
David S. Miller01f94c42007-03-04 12:53:19 -0800254 u32 class;
David S. Millera2fb23a2007-02-28 23:35:04 -0800255
Gu Zheng8b1fce02013-05-25 21:48:31 +0800256 dev = pci_alloc_dev(bus);
David S. Millera2fb23a2007-02-28 23:35:04 -0800257 if (!dev)
258 return NULL;
259
260 sd = &dev->dev.archdata;
261 sd->iommu = pbm->iommu;
262 sd->stc = &pbm->stc;
263 sd->host_controller = pbm;
David S. Millerae05f872008-08-29 22:42:34 -0700264 sd->op = op = of_find_device_by_node(node);
David S. Millerc1b1a5f12008-03-19 04:52:48 -0700265 sd->numa_node = pbm->numa_node;
David S. Millera2fb23a2007-02-28 23:35:04 -0800266
David S. Millerae05f872008-08-29 22:42:34 -0700267 sd = &op->dev.archdata;
David S. Millerad7ad572007-07-27 22:39:14 -0700268 sd->iommu = pbm->iommu;
269 sd->stc = &pbm->stc;
David S. Millerc1b1a5f12008-03-19 04:52:48 -0700270 sd->numa_node = pbm->numa_node;
David S. Millerad7ad572007-07-27 22:39:14 -0700271
David S. Millerae05f872008-08-29 22:42:34 -0700272 if (!strcmp(node->name, "ebus"))
273 of_propagate_archdata(op);
274
David S. Millera2fb23a2007-02-28 23:35:04 -0800275 type = of_get_property(node, "device_type", NULL);
276 if (type == NULL)
277 type = "";
278
David S. Miller5840fc62007-05-22 01:24:14 -0700279 if (ofpci_verbose)
280 printk(" create device, devfn: %x, type: %s\n",
281 devfn, type);
David S. Millera2fb23a2007-02-28 23:35:04 -0800282
David S. Millera2fb23a2007-02-28 23:35:04 -0800283 dev->sysdata = node;
284 dev->dev.parent = bus->bridge;
285 dev->dev.bus = &pci_bus_type;
Benjamin Herrenschmidt98d9f30c82011-04-11 11:37:07 +1000286 dev->dev.of_node = of_node_get(node);
David S. Millera2fb23a2007-02-28 23:35:04 -0800287 dev->devfn = devfn;
288 dev->multifunction = 0; /* maybe a lie? */
David S. Miller172d2d02010-02-17 16:42:08 -0800289 set_pcie_port_type(dev);
290
Yijing Wang017ffe62015-07-17 17:16:32 +0800291 pci_dev_assign_slot(dev);
David S. Millerc26d3c02008-05-01 01:12:40 -0700292 dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
293 dev->device = of_getintprop_default(node, "device-id", 0xffff);
294 dev->subsystem_vendor =
295 of_getintprop_default(node, "subsystem-vendor-id", 0);
296 dev->subsystem_device =
297 of_getintprop_default(node, "subsystem-id", 0);
David S. Millera2fb23a2007-02-28 23:35:04 -0800298
David S. Millerc26d3c02008-05-01 01:12:40 -0700299 dev->cfg_size = pci_cfg_space_size(dev);
David S. Miller01f94c42007-03-04 12:53:19 -0800300
David S. Millerc26d3c02008-05-01 01:12:40 -0700301 /* We can't actually use the firmware value, we have
302 * to read what is in the register right now. One
303 * reason is that in the case of IDE interfaces the
304 * firmware can sample the value before the the IDE
305 * interface is programmed into native mode.
306 */
307 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
308 dev->class = class >> 8;
309 dev->revision = class & 0xff;
David S. Miller28f57e72007-03-12 19:40:26 -0700310
Greg Kroah-Hartman2222c312008-05-02 06:02:41 +0200311 dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus),
David S. Millerc26d3c02008-05-01 01:12:40 -0700312 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
313
David S. Miller5840fc62007-05-22 01:24:14 -0700314 if (ofpci_verbose)
315 printk(" class: 0x%x device name: %s\n",
316 dev->class, pci_name(dev));
David S. Millera2fb23a2007-02-28 23:35:04 -0800317
David S. Miller861fe902007-05-02 17:31:36 -0700318 /* I have seen IDE devices which will not respond to
319 * the bmdma simplex check reads if bus mastering is
320 * disabled.
321 */
322 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
323 pci_set_master(dev);
324
Bjorn Helgaasde7f2b12013-05-20 17:15:20 -0600325 dev->current_state = PCI_UNKNOWN; /* unknown power state */
David S. Millera2fb23a2007-02-28 23:35:04 -0800326 dev->error_state = pci_channel_io_normal;
David S. Miller172d2d02010-02-17 16:42:08 -0800327 dev->dma_mask = 0xffffffff;
David S. Millera2fb23a2007-02-28 23:35:04 -0800328
David S. Miller44b50e52008-09-22 15:42:24 -0700329 if (!strcmp(node->name, "pci")) {
David S. Millerc26d3c02008-05-01 01:12:40 -0700330 /* a PCI-PCI bridge */
David S. Millera2fb23a2007-02-28 23:35:04 -0800331 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
332 dev->rom_base_reg = PCI_ROM_ADDRESS1;
David S. Millerc26d3c02008-05-01 01:12:40 -0700333 } else if (!strcmp(type, "cardbus")) {
334 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
David S. Millera2fb23a2007-02-28 23:35:04 -0800335 } else {
David S. Millerc26d3c02008-05-01 01:12:40 -0700336 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
337 dev->rom_base_reg = PCI_ROM_ADDRESS;
David S. Millera2fb23a2007-02-28 23:35:04 -0800338
Grant Likely1636f8a2010-06-18 11:09:58 -0600339 dev->irq = sd->op->archdata.irqs[0];
David S. Millerc26d3c02008-05-01 01:12:40 -0700340 if (dev->irq == 0xffffffff)
341 dev->irq = PCI_IRQ_NONE;
David S. Millera2fb23a2007-02-28 23:35:04 -0800342 }
David S. Millerc26d3c02008-05-01 01:12:40 -0700343
David S. Millera2fb23a2007-02-28 23:35:04 -0800344 pci_parse_of_addrs(sd->op, node, dev);
345
David S. Miller5840fc62007-05-22 01:24:14 -0700346 if (ofpci_verbose)
347 printk(" adding to system ...\n");
David S. Millera2fb23a2007-02-28 23:35:04 -0800348
349 pci_device_add(dev, bus);
350
351 return dev;
352}
353
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100354static void apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p)
David S. Miller01f94c42007-03-04 12:53:19 -0800355{
356 u32 idx, first, last;
357
358 first = 8;
359 last = 0;
360 for (idx = 0; idx < 8; idx++) {
361 if ((map & (1 << idx)) != 0) {
362 if (first > idx)
363 first = idx;
364 if (last < idx)
365 last = idx;
366 }
367 }
368
369 *first_p = first;
370 *last_p = last;
371}
372
373/* Cook up fake bus resources for SUNW,simba PCI bridges which lack
374 * a proper 'ranges' property.
375 */
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100376static void apb_fake_ranges(struct pci_dev *dev,
377 struct pci_bus *bus,
378 struct pci_pbm_info *pbm)
David S. Miller01f94c42007-03-04 12:53:19 -0800379{
Bjorn Helgaasa031589b2012-03-16 17:48:24 -0600380 struct pci_bus_region region;
David S. Miller01f94c42007-03-04 12:53:19 -0800381 struct resource *res;
382 u32 first, last;
383 u8 map;
384
385 pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map);
386 apb_calc_first_last(map, &first, &last);
387 res = bus->resource[0];
David S. Miller01f94c42007-03-04 12:53:19 -0800388 res->flags = IORESOURCE_IO;
Bjorn Helgaasa031589b2012-03-16 17:48:24 -0600389 region.start = (first << 21);
390 region.end = (last << 21) + ((1 << 21) - 1);
Yinghai Lufc279852013-12-09 22:54:40 -0800391 pcibios_bus_to_resource(dev->bus, res, &region);
David S. Miller01f94c42007-03-04 12:53:19 -0800392
393 pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
394 apb_calc_first_last(map, &first, &last);
395 res = bus->resource[1];
David S. Miller01f94c42007-03-04 12:53:19 -0800396 res->flags = IORESOURCE_MEM;
oftedal557fc582013-10-18 22:28:29 +0200397 region.start = (first << 29);
398 region.end = (last << 29) + ((1 << 29) - 1);
Yinghai Lufc279852013-12-09 22:54:40 -0800399 pcibios_bus_to_resource(dev->bus, res, &region);
David S. Miller01f94c42007-03-04 12:53:19 -0800400}
401
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100402static void pci_of_scan_bus(struct pci_pbm_info *pbm,
403 struct device_node *node,
404 struct pci_bus *bus);
David S. Millera2fb23a2007-02-28 23:35:04 -0800405
406#define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
407
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100408static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
409 struct device_node *node,
410 struct pci_dev *dev)
David S. Millera2fb23a2007-02-28 23:35:04 -0800411{
412 struct pci_bus *bus;
413 const u32 *busrange, *ranges;
David S. Miller01f94c42007-03-04 12:53:19 -0800414 int len, i, simba;
Bjorn Helgaasa031589b2012-03-16 17:48:24 -0600415 struct pci_bus_region region;
David S. Millera2fb23a2007-02-28 23:35:04 -0800416 struct resource *res;
417 unsigned int flags;
418 u64 size;
419
David S. Miller5840fc62007-05-22 01:24:14 -0700420 if (ofpci_verbose)
421 printk("of_scan_pci_bridge(%s)\n", node->full_name);
David S. Millera2fb23a2007-02-28 23:35:04 -0800422
423 /* parse bus-range property */
424 busrange = of_get_property(node, "bus-range", &len);
425 if (busrange == NULL || len != 8) {
426 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
427 node->full_name);
428 return;
429 }
David S. Miller93a64232014-08-12 23:22:39 -0700430
431 if (ofpci_verbose)
432 printk(" Bridge bus range [%u --> %u]\n",
433 busrange[0], busrange[1]);
434
David S. Millera2fb23a2007-02-28 23:35:04 -0800435 ranges = of_get_property(node, "ranges", &len);
David S. Miller01f94c42007-03-04 12:53:19 -0800436 simba = 0;
David S. Millera2fb23a2007-02-28 23:35:04 -0800437 if (ranges == NULL) {
David S. Millera165b422007-03-29 01:50:16 -0700438 const char *model = of_get_property(node, "model", NULL);
David S. Miller8c2786c2007-06-07 21:59:44 -0700439 if (model && !strcmp(model, "SUNW,simba"))
David S. Miller01f94c42007-03-04 12:53:19 -0800440 simba = 1;
David S. Millera2fb23a2007-02-28 23:35:04 -0800441 }
442
443 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
444 if (!bus) {
445 printk(KERN_ERR "Failed to create pci bus for %s\n",
446 node->full_name);
447 return;
448 }
449
450 bus->primary = dev->bus->number;
Yinghai Lu3f1b540d2012-05-17 18:51:12 -0700451 pci_bus_insert_busn_res(bus, busrange[0], busrange[1]);
David S. Millera2fb23a2007-02-28 23:35:04 -0800452 bus->bridge_ctl = 0;
453
David S. Miller93a64232014-08-12 23:22:39 -0700454 if (ofpci_verbose)
455 printk(" Bridge ranges[%p] simba[%d]\n",
456 ranges, simba);
457
David S. Miller01f94c42007-03-04 12:53:19 -0800458 /* parse ranges property, or cook one up by hand for Simba */
David S. Millera2fb23a2007-02-28 23:35:04 -0800459 /* PCI #address-cells == 3 and #size-cells == 2 always */
460 res = &dev->resource[PCI_BRIDGE_RESOURCES];
461 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
462 res->flags = 0;
463 bus->resource[i] = res;
464 ++res;
465 }
David S. Miller01f94c42007-03-04 12:53:19 -0800466 if (simba) {
467 apb_fake_ranges(dev, bus, pbm);
David S. Miller8c2786c2007-06-07 21:59:44 -0700468 goto after_ranges;
469 } else if (ranges == NULL) {
Bjorn Helgaas1c975932012-07-09 13:39:52 -0600470 pci_read_bridge_bases(bus);
David S. Miller8c2786c2007-06-07 21:59:44 -0700471 goto after_ranges;
David S. Miller01f94c42007-03-04 12:53:19 -0800472 }
David S. Millera2fb23a2007-02-28 23:35:04 -0800473 i = 1;
474 for (; len >= 32; len -= 32, ranges += 8) {
David S. Miller93a64232014-08-12 23:22:39 -0700475 u64 start;
476
477 if (ofpci_verbose)
478 printk(" RAW Range[%08x:%08x:%08x:%08x:%08x:%08x:"
479 "%08x:%08x]\n",
480 ranges[0], ranges[1], ranges[2], ranges[3],
481 ranges[4], ranges[5], ranges[6], ranges[7]);
482
David S. Millera2fb23a2007-02-28 23:35:04 -0800483 flags = pci_parse_of_flags(ranges[0]);
484 size = GET_64BIT(ranges, 6);
485 if (flags == 0 || size == 0)
486 continue;
David S. Miller4afba242014-08-12 23:27:01 -0700487
488 /* On PCI-Express systems, PCI bridges that have no devices downstream
489 * have a bogus size value where the first 32-bit cell is 0xffffffff.
490 * This results in a bogus range where start + size overflows.
491 *
492 * Just skip these otherwise the kernel will complain when the resource
493 * tries to be claimed.
494 */
495 if (size >> 32 == 0xffffffff)
496 continue;
497
David S. Millera2fb23a2007-02-28 23:35:04 -0800498 if (flags & IORESOURCE_IO) {
499 res = bus->resource[0];
500 if (res->flags) {
501 printk(KERN_ERR "PCI: ignoring extra I/O range"
502 " for bridge %s\n", node->full_name);
503 continue;
504 }
David S. Millera2fb23a2007-02-28 23:35:04 -0800505 } else {
506 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
507 printk(KERN_ERR "PCI: too many memory ranges"
508 " for bridge %s\n", node->full_name);
509 continue;
510 }
511 res = bus->resource[i];
512 ++i;
David S. Millera2fb23a2007-02-28 23:35:04 -0800513 }
514
David S. Millera2fb23a2007-02-28 23:35:04 -0800515 res->flags = flags;
David S. Miller93a64232014-08-12 23:22:39 -0700516 region.start = start = GET_64BIT(ranges, 1);
Bjorn Helgaasa031589b2012-03-16 17:48:24 -0600517 region.end = region.start + size - 1;
David S. Miller93a64232014-08-12 23:22:39 -0700518
519 if (ofpci_verbose)
520 printk(" Using flags[%08x] start[%016llx] size[%016llx]\n",
521 flags, start, size);
522
Yinghai Lufc279852013-12-09 22:54:40 -0800523 pcibios_bus_to_resource(dev->bus, res, &region);
David S. Millera2fb23a2007-02-28 23:35:04 -0800524 }
David S. Miller8c2786c2007-06-07 21:59:44 -0700525after_ranges:
David S. Millera2fb23a2007-02-28 23:35:04 -0800526 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
527 bus->number);
David S. Miller5840fc62007-05-22 01:24:14 -0700528 if (ofpci_verbose)
529 printk(" bus name: %s\n", bus->name);
David S. Millera2fb23a2007-02-28 23:35:04 -0800530
531 pci_of_scan_bus(pbm, node, bus);
532}
533
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100534static void pci_of_scan_bus(struct pci_pbm_info *pbm,
535 struct device_node *node,
536 struct pci_bus *bus)
David S. Millera2fb23a2007-02-28 23:35:04 -0800537{
538 struct device_node *child;
539 const u32 *reg;
David S. Miller2cc73452007-09-12 10:15:59 +0200540 int reglen, devfn, prev_devfn;
David S. Millera2fb23a2007-02-28 23:35:04 -0800541 struct pci_dev *dev;
542
David S. Miller5840fc62007-05-22 01:24:14 -0700543 if (ofpci_verbose)
544 printk("PCI: scan_bus[%s] bus no %d\n",
545 node->full_name, bus->number);
David S. Millera2fb23a2007-02-28 23:35:04 -0800546
547 child = NULL;
David S. Miller2cc73452007-09-12 10:15:59 +0200548 prev_devfn = -1;
David S. Millera2fb23a2007-02-28 23:35:04 -0800549 while ((child = of_get_next_child(node, child)) != NULL) {
David S. Miller5840fc62007-05-22 01:24:14 -0700550 if (ofpci_verbose)
551 printk(" * %s\n", child->full_name);
David S. Millera2fb23a2007-02-28 23:35:04 -0800552 reg = of_get_property(child, "reg", &reglen);
553 if (reg == NULL || reglen < 20)
554 continue;
David S. Miller2cc73452007-09-12 10:15:59 +0200555
David S. Millera2fb23a2007-02-28 23:35:04 -0800556 devfn = (reg[0] >> 8) & 0xff;
557
David S. Miller2cc73452007-09-12 10:15:59 +0200558 /* This is a workaround for some device trees
559 * which list PCI devices twice. On the V100
560 * for example, device number 3 is listed twice.
561 * Once as "pm" and once again as "lomp".
562 */
563 if (devfn == prev_devfn)
564 continue;
565 prev_devfn = devfn;
566
David S. Millera2fb23a2007-02-28 23:35:04 -0800567 /* create a new pci_dev for this device */
David S. Millerc26d3c02008-05-01 01:12:40 -0700568 dev = of_create_pci_dev(pbm, child, bus, devfn);
David S. Millera2fb23a2007-02-28 23:35:04 -0800569 if (!dev)
570 continue;
David S. Miller5840fc62007-05-22 01:24:14 -0700571 if (ofpci_verbose)
572 printk("PCI: dev header type: %x\n",
573 dev->hdr_type);
David S. Millera2fb23a2007-02-28 23:35:04 -0800574
Yijing Wang2f22e682014-05-04 12:23:42 +0800575 if (pci_is_bridge(dev))
David S. Millera2fb23a2007-02-28 23:35:04 -0800576 of_scan_pci_bridge(pbm, child, dev);
577 }
578}
579
580static ssize_t
581show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
582{
583 struct pci_dev *pdev;
584 struct device_node *dp;
585
586 pdev = to_pci_dev(dev);
Grant Likely61c7a082010-04-13 16:12:29 -0700587 dp = pdev->dev.of_node;
David S. Millera2fb23a2007-02-28 23:35:04 -0800588
589 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
590}
591
592static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
593
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100594static void pci_bus_register_of_sysfs(struct pci_bus *bus)
David S. Millera2fb23a2007-02-28 23:35:04 -0800595{
596 struct pci_dev *dev;
David S. Millera378fd02007-03-01 11:46:13 -0800597 struct pci_bus *child_bus;
David S. Millera2fb23a2007-02-28 23:35:04 -0800598 int err;
599
600 list_for_each_entry(dev, &bus->devices, bus_list) {
601 /* we don't really care if we can create this file or
602 * not, but we need to assign the result of the call
603 * or the world will fall under alien invasion and
604 * everybody will be frozen on a spaceship ready to be
605 * eaten on alpha centauri by some green and jelly
606 * humanoid.
607 */
608 err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);
David S. Millerc6fee082011-02-26 23:40:02 -0800609 (void) err;
David S. Millera2fb23a2007-02-28 23:35:04 -0800610 }
David S. Millera378fd02007-03-01 11:46:13 -0800611 list_for_each_entry(child_bus, &bus->children, node)
612 pci_bus_register_of_sysfs(child_bus);
David S. Millera2fb23a2007-02-28 23:35:04 -0800613}
614
David S. Millerf1d25d32014-08-12 23:29:09 -0700615static void pci_claim_bus_resources(struct pci_bus *bus)
616{
617 struct pci_bus *child_bus;
618 struct pci_dev *dev;
619
620 list_for_each_entry(dev, &bus->devices, bus_list) {
621 int i;
622
623 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
624 struct resource *r = &dev->resource[i];
625
626 if (r->parent || !r->start || !r->flags)
627 continue;
628
629 if (ofpci_verbose)
630 printk("PCI: Claiming %s: "
631 "Resource %d: %016llx..%016llx [%x]\n",
632 pci_name(dev), i,
633 (unsigned long long)r->start,
634 (unsigned long long)r->end,
635 (unsigned int)r->flags);
636
Bjorn Helgaasd10b7302015-04-08 10:04:55 -0500637 pci_claim_resource(dev, i);
David S. Millerf1d25d32014-08-12 23:29:09 -0700638 }
639 }
640
641 list_for_each_entry(child_bus, &bus->children, node)
642 pci_claim_bus_resources(child_bus);
643}
644
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100645struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
646 struct device *parent)
David S. Millera2fb23a2007-02-28 23:35:04 -0800647{
Bjorn Helgaas1a300102011-10-28 16:27:53 -0600648 LIST_HEAD(resources);
Grant Likely61c7a082010-04-13 16:12:29 -0700649 struct device_node *node = pbm->op->dev.of_node;
David S. Millera2fb23a2007-02-28 23:35:04 -0800650 struct pci_bus *bus;
651
652 printk("PCI: Scanning PBM %s\n", node->full_name);
653
Bjorn Helgaasac1edcc2012-02-23 20:19:04 -0700654 pci_add_resource_offset(&resources, &pbm->io_space,
655 pbm->io_space.start);
656 pci_add_resource_offset(&resources, &pbm->mem_space,
657 pbm->mem_space.start);
Yinghai Lu3f1b540d2012-05-17 18:51:12 -0700658 pbm->busn.start = pbm->pci_first_busno;
659 pbm->busn.end = pbm->pci_last_busno;
660 pbm->busn.flags = IORESOURCE_BUS;
661 pci_add_resource(&resources, &pbm->busn);
Bjorn Helgaas1a300102011-10-28 16:27:53 -0600662 bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops,
663 pbm, &resources);
David S. Millera2fb23a2007-02-28 23:35:04 -0800664 if (!bus) {
665 printk(KERN_ERR "Failed to create bus for %s\n",
666 node->full_name);
Bjorn Helgaas1a300102011-10-28 16:27:53 -0600667 pci_free_resource_list(&resources);
David S. Millera2fb23a2007-02-28 23:35:04 -0800668 return NULL;
669 }
David S. Millera2fb23a2007-02-28 23:35:04 -0800670
David S. Millera2fb23a2007-02-28 23:35:04 -0800671 pci_of_scan_bus(pbm, node, bus);
David S. Millera2fb23a2007-02-28 23:35:04 -0800672 pci_bus_register_of_sysfs(bus);
673
David S. Millerf1d25d32014-08-12 23:29:09 -0700674 pci_claim_bus_resources(bus);
Yijing Wanga0c8a4d2015-03-12 15:05:56 -0500675 pci_bus_add_devices(bus);
David S. Millera2fb23a2007-02-28 23:35:04 -0800676 return bus;
677}
678
Sam Ravnborgb7c13f72013-01-01 16:02:33 +0100679void pcibios_fixup_bus(struct pci_bus *pbus)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681}
682
Dominik Brodowski3b7a17f2010-01-01 17:40:50 +0100683resource_size_t pcibios_align_resource(void *data, const struct resource *res,
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100684 resource_size_t size, resource_size_t align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685{
Dominik Brodowskib26b2d42010-01-01 17:40:49 +0100686 return res->start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687}
688
David S. Millera2fb23a2007-02-28 23:35:04 -0800689int pcibios_enable_device(struct pci_dev *dev, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690{
David S. Millera2fb23a2007-02-28 23:35:04 -0800691 u16 cmd, oldcmd;
692 int i;
693
694 pci_read_config_word(dev, PCI_COMMAND, &cmd);
695 oldcmd = cmd;
696
697 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
698 struct resource *res = &dev->resource[i];
699
700 /* Only set up the requested stuff */
701 if (!(mask & (1<<i)))
702 continue;
703
704 if (res->flags & IORESOURCE_IO)
705 cmd |= PCI_COMMAND_IO;
706 if (res->flags & IORESOURCE_MEM)
707 cmd |= PCI_COMMAND_MEMORY;
708 }
709
710 if (cmd != oldcmd) {
711 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
712 pci_name(dev), cmd);
713 /* Enable the appropriate bits in the PCI command register. */
714 pci_write_config_word(dev, PCI_COMMAND, cmd);
715 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 return 0;
717}
718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719/* Platform support for /proc/bus/pci/X/Y mmap()s. */
720
721/* If the user uses a host-bridge as the PCI device, he may use
722 * this to perform a raw mmap() of the I/O or MEM space behind
723 * that controller.
724 *
725 * This can be useful for execution of x86 PCI bios initialization code
726 * on a PCI card, like the xfree86 int10 stuff does.
727 */
728static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
729 enum pci_mmap_state mmap_state)
730{
David S. Millera2fb23a2007-02-28 23:35:04 -0800731 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 unsigned long space_size, user_offset, user_size;
733
David S. Miller3875c5c2007-03-08 22:52:11 -0800734 if (mmap_state == pci_mmap_io) {
Joe Perches28f65c112011-06-09 09:13:32 -0700735 space_size = resource_size(&pbm->io_space);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 } else {
Joe Perches28f65c112011-06-09 09:13:32 -0700737 space_size = resource_size(&pbm->mem_space);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 }
739
740 /* Make sure the request is in range. */
741 user_offset = vma->vm_pgoff << PAGE_SHIFT;
742 user_size = vma->vm_end - vma->vm_start;
743
744 if (user_offset >= space_size ||
745 (user_offset + user_size) > space_size)
746 return -EINVAL;
747
David S. Miller3875c5c2007-03-08 22:52:11 -0800748 if (mmap_state == pci_mmap_io) {
749 vma->vm_pgoff = (pbm->io_space.start +
750 user_offset) >> PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 } else {
David S. Miller3875c5c2007-03-08 22:52:11 -0800752 vma->vm_pgoff = (pbm->mem_space.start +
753 user_offset) >> PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 }
755
756 return 0;
757}
758
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700759/* Adjust vm_pgoff of VMA such that it is the physical page offset
760 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 *
762 * Basically, the user finds the base address for his device which he wishes
763 * to mmap. They read the 32-bit value from the config space base register,
764 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
765 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
766 *
767 * Returns negative error code on failure, zero on success.
768 */
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700769static int __pci_mmap_make_offset(struct pci_dev *pdev,
770 struct vm_area_struct *vma,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 enum pci_mmap_state mmap_state)
772{
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700773 unsigned long user_paddr, user_size;
774 int i, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700776 /* First compute the physical address in vma->vm_pgoff,
777 * making sure the user offset is within range in the
778 * appropriate PCI space.
779 */
780 err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
781 if (err)
782 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700784 /* If this is a mapping on a host bridge, any address
785 * is OK.
786 */
787 if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
788 return err;
789
790 /* Otherwise make sure it's in the range for one of the
791 * device's resources.
792 */
793 user_paddr = vma->vm_pgoff << PAGE_SHIFT;
794 user_size = vma->vm_end - vma->vm_start;
795
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700797 struct resource *rp = &pdev->resource[i];
Max Dmitrichenko57699072008-11-02 00:34:10 -0700798 resource_size_t aligned_end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
800 /* Active? */
801 if (!rp->flags)
802 continue;
803
804 /* Same type? */
805 if (i == PCI_ROM_RESOURCE) {
806 if (mmap_state != pci_mmap_mem)
807 continue;
808 } else {
809 if ((mmap_state == pci_mmap_io &&
810 (rp->flags & IORESOURCE_IO) == 0) ||
811 (mmap_state == pci_mmap_mem &&
812 (rp->flags & IORESOURCE_MEM) == 0))
813 continue;
814 }
815
Max Dmitrichenko57699072008-11-02 00:34:10 -0700816 /* Align the resource end to the next page address.
817 * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1),
818 * because actually we need the address of the next byte
819 * after rp->end.
820 */
821 aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK;
822
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700823 if ((rp->start <= user_paddr) &&
Max Dmitrichenko57699072008-11-02 00:34:10 -0700824 (user_paddr + user_size) <= aligned_end)
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700825 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 }
827
David S. Millerbbe0b5e2007-10-11 15:41:01 -0700828 if (i > PCI_ROM_RESOURCE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 return -EINVAL;
830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 return 0;
832}
833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834/* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
835 * device mapping.
836 */
837static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
838 enum pci_mmap_state mmap_state)
839{
David S. Millera7a6cac2005-09-01 21:51:26 -0700840 /* Our io_remap_pfn_range takes care of this, do nothing. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841}
842
843/* Perform the actual remap of the pages for a PCI device mapping, as appropriate
844 * for this architecture. The region in the process to map is described by vm_start
845 * and vm_end members of VMA, the base physical address is found in vm_pgoff.
846 * The pci device structure is provided so that architectures may make mapping
847 * decisions on a per-device or per-bus basis.
848 *
849 * Returns a negative error code on failure, zero on success.
850 */
851int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
852 enum pci_mmap_state mmap_state,
853 int write_combine)
854{
855 int ret;
856
857 ret = __pci_mmap_make_offset(dev, vma, mmap_state);
858 if (ret < 0)
859 return ret;
860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 __pci_mmap_set_pgprot(dev, vma, mmap_state);
862
David S. Miller14778d92006-03-21 02:29:39 -0800863 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 ret = io_remap_pfn_range(vma, vma->vm_start,
865 vma->vm_pgoff,
866 vma->vm_end - vma->vm_start,
867 vma->vm_page_prot);
868 if (ret)
869 return ret;
870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 return 0;
872}
873
David S. Millerc1b1a5f12008-03-19 04:52:48 -0700874#ifdef CONFIG_NUMA
875int pcibus_to_node(struct pci_bus *pbus)
876{
877 struct pci_pbm_info *pbm = pbus->sysdata;
878
879 return pbm->numa_node;
880}
881EXPORT_SYMBOL(pcibus_to_node);
882#endif
883
David S. Millerd3ae4b52008-09-09 23:54:02 -0700884/* Return the domain number for this pci bus */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885
886int pci_domain_nr(struct pci_bus *pbus)
887{
888 struct pci_pbm_info *pbm = pbus->sysdata;
889 int ret;
890
David S. Millerd3ae4b52008-09-09 23:54:02 -0700891 if (!pbm) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 ret = -ENXIO;
893 } else {
David S. Miller6c108f12007-05-07 23:49:01 -0700894 ret = pbm->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 }
896
897 return ret;
898}
899EXPORT_SYMBOL(pci_domain_nr);
900
David S. Miller35a17eb2007-02-10 17:41:02 -0800901#ifdef CONFIG_PCI_MSI
902int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
903{
David S. Millera2fb23a2007-02-28 23:35:04 -0800904 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
Sam Ravnborg44ed3c02011-01-22 11:32:20 +0000905 unsigned int irq;
David S. Miller35a17eb2007-02-10 17:41:02 -0800906
David S. Millere9870c42007-05-07 23:28:50 -0700907 if (!pbm->setup_msi_irq)
David S. Miller35a17eb2007-02-10 17:41:02 -0800908 return -EINVAL;
909
Sam Ravnborg44ed3c02011-01-22 11:32:20 +0000910 return pbm->setup_msi_irq(&irq, pdev, desc);
David S. Miller35a17eb2007-02-10 17:41:02 -0800911}
912
Sam Ravnborg44ed3c02011-01-22 11:32:20 +0000913void arch_teardown_msi_irq(unsigned int irq)
David S. Miller35a17eb2007-02-10 17:41:02 -0800914{
Thomas Gleixner394d4412011-03-24 17:52:54 +0100915 struct msi_desc *entry = irq_get_msi_desc(irq);
Jiang Liu3bf15f52015-07-09 16:00:42 +0800916 struct pci_dev *pdev = msi_desc_to_pci_dev(entry);
David S. Millera2fb23a2007-02-28 23:35:04 -0800917 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
David S. Miller35a17eb2007-02-10 17:41:02 -0800918
David S. Miller77d10d02008-09-11 23:57:40 -0700919 if (pbm->teardown_msi_irq)
Sam Ravnborg44ed3c02011-01-22 11:32:20 +0000920 pbm->teardown_msi_irq(irq, pdev);
David S. Miller35a17eb2007-02-10 17:41:02 -0800921}
922#endif /* !(CONFIG_PCI_MSI) */
923
David S. Millerad7ad572007-07-27 22:39:14 -0700924static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
925{
926 struct pci_dev *ali_isa_bridge;
927 u8 val;
928
929 /* ALI sound chips generate 31-bits of DMA, a special register
930 * determines what bit 31 is emitted as.
931 */
932 ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL,
933 PCI_DEVICE_ID_AL_M1533,
934 NULL);
935
936 pci_read_config_byte(ali_isa_bridge, 0x7e, &val);
937 if (set_bit)
938 val |= 0x01;
939 else
940 val &= ~0x01;
941 pci_write_config_byte(ali_isa_bridge, 0x7e, val);
942 pci_dev_put(ali_isa_bridge);
943}
944
FUJITA Tomonoriee664a92009-08-10 11:53:16 +0900945int pci64_dma_supported(struct pci_dev *pdev, u64 device_mask)
David S. Millerad7ad572007-07-27 22:39:14 -0700946{
947 u64 dma_addr_mask;
948
949 if (pdev == NULL) {
950 dma_addr_mask = 0xffffffff;
951 } else {
952 struct iommu *iommu = pdev->dev.archdata.iommu;
953
954 dma_addr_mask = iommu->dma_addr_mask;
955
956 if (pdev->vendor == PCI_VENDOR_ID_AL &&
957 pdev->device == PCI_DEVICE_ID_AL_M5451 &&
958 device_mask == 0x7fffffff) {
959 ali_sound_dma_hack(pdev,
960 (dma_addr_mask & 0x80000000) != 0);
961 return 1;
962 }
963 }
964
965 if (device_mask >= (1UL << 32UL))
966 return 0;
967
968 return (device_mask & dma_addr_mask) == dma_addr_mask;
969}
970
David S. Millerbcea1db2007-12-25 02:20:33 -0800971void pci_resource_to_user(const struct pci_dev *pdev, int bar,
972 const struct resource *rp, resource_size_t *start,
973 resource_size_t *end)
974{
975 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
976 unsigned long offset;
977
978 if (rp->flags & IORESOURCE_IO)
979 offset = pbm->io_space.start;
980 else
981 offset = pbm->mem_space.start;
982
983 *start = rp->start - offset;
984 *end = rp->end - offset;
985}
Tejun Heo4c0eec72009-09-22 17:34:17 +0900986
Myron Stoweba232a12011-10-28 15:48:10 -0600987void pcibios_set_master(struct pci_dev *dev)
988{
989 /* No special bus mastering setup handling */
990}
991
Tejun Heo4c0eec72009-09-22 17:34:17 +0900992static int __init pcibios_init(void)
993{
994 pci_dfl_cache_line_size = 64 >> 2;
995 return 0;
996}
997subsys_initcall(pcibios_init);
David S. Miller2ef2d742010-02-20 19:53:55 -0800998
999#ifdef CONFIG_SYSFS
Eric Snowbergf0c1a112015-05-27 11:59:19 -04001000
1001#define SLOT_NAME_SIZE 11 /* Max decimal digits + null in u32 */
1002
1003static void pcie_bus_slot_names(struct pci_bus *pbus)
1004{
1005 struct pci_dev *pdev;
1006 struct pci_bus *bus;
1007
1008 list_for_each_entry(pdev, &pbus->devices, bus_list) {
1009 char name[SLOT_NAME_SIZE];
1010 struct pci_slot *pci_slot;
1011 const u32 *slot_num;
1012 int len;
1013
1014 slot_num = of_get_property(pdev->dev.of_node,
1015 "physical-slot#", &len);
1016
1017 if (slot_num == NULL || len != 4)
1018 continue;
1019
1020 snprintf(name, sizeof(name), "%u", slot_num[0]);
1021 pci_slot = pci_create_slot(pbus, slot_num[0], name, NULL);
1022
1023 if (IS_ERR(pci_slot))
1024 pr_err("PCI: pci_create_slot returned %ld.\n",
1025 PTR_ERR(pci_slot));
1026 }
1027
1028 list_for_each_entry(bus, &pbus->children, node)
1029 pcie_bus_slot_names(bus);
1030}
1031
Sam Ravnborgb7c13f72013-01-01 16:02:33 +01001032static void pci_bus_slot_names(struct device_node *node, struct pci_bus *bus)
David S. Miller2ef2d742010-02-20 19:53:55 -08001033{
1034 const struct pci_slot_names {
1035 u32 slot_mask;
1036 char names[0];
1037 } *prop;
1038 const char *sp;
1039 int len, i;
1040 u32 mask;
1041
1042 prop = of_get_property(node, "slot-names", &len);
1043 if (!prop)
1044 return;
1045
1046 mask = prop->slot_mask;
1047 sp = prop->names;
1048
1049 if (ofpci_verbose)
1050 printk("PCI: Making slots for [%s] mask[0x%02x]\n",
1051 node->full_name, mask);
1052
1053 i = 0;
1054 while (mask) {
1055 struct pci_slot *pci_slot;
1056 u32 this_bit = 1 << i;
1057
1058 if (!(mask & this_bit)) {
1059 i++;
1060 continue;
1061 }
1062
1063 if (ofpci_verbose)
1064 printk("PCI: Making slot [%s]\n", sp);
1065
1066 pci_slot = pci_create_slot(bus, i, sp, NULL);
1067 if (IS_ERR(pci_slot))
1068 printk(KERN_ERR "PCI: pci_create_slot returned %ld\n",
1069 PTR_ERR(pci_slot));
1070
1071 sp += strlen(sp) + 1;
1072 mask &= ~this_bit;
1073 i++;
1074 }
1075}
1076
1077static int __init of_pci_slot_init(void)
1078{
1079 struct pci_bus *pbus = NULL;
1080
1081 while ((pbus = pci_find_next_bus(pbus)) != NULL) {
1082 struct device_node *node;
Eric Snowbergf0c1a112015-05-27 11:59:19 -04001083 struct pci_dev *pdev;
David S. Miller2ef2d742010-02-20 19:53:55 -08001084
Eric Snowbergf0c1a112015-05-27 11:59:19 -04001085 pdev = list_first_entry(&pbus->devices, struct pci_dev,
1086 bus_list);
1087
1088 if (pdev && pci_is_pcie(pdev)) {
1089 pcie_bus_slot_names(pbus);
David S. Miller2ef2d742010-02-20 19:53:55 -08001090 } else {
David S. Miller2ef2d742010-02-20 19:53:55 -08001091
Eric Snowbergf0c1a112015-05-27 11:59:19 -04001092 if (pbus->self) {
1093
1094 /* PCI->PCI bridge */
1095 node = pbus->self->dev.of_node;
1096
1097 } else {
1098 struct pci_pbm_info *pbm = pbus->sysdata;
1099
1100 /* Host PCI controller */
1101 node = pbm->op->dev.of_node;
1102 }
1103
1104 pci_bus_slot_names(node, pbus);
David S. Miller2ef2d742010-02-20 19:53:55 -08001105 }
David S. Miller2ef2d742010-02-20 19:53:55 -08001106 }
1107
1108 return 0;
1109}
Paul Gortmaker1b925b52014-01-12 13:07:30 -05001110device_initcall(of_pci_slot_init);
David S. Miller2ef2d742010-02-20 19:53:55 -08001111#endif