David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 1 | /* pci.c: UltraSparc PCI controller support. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
| 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 6 | * |
| 7 | * OF tree based PCI bus probing taken from the PowerPC port |
| 8 | * with minor modifications, see there for credits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | */ |
| 10 | |
Paul Gortmaker | 066bcac | 2011-07-22 13:18:16 -0400 | [diff] [blame] | 11 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #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. Miller | c57c2ff | 2007-05-08 00:43:56 -0700 | [diff] [blame] | 17 | #include <linux/pci.h> |
David S. Miller | 35a17eb | 2007-02-10 17:41:02 -0800 | [diff] [blame] | 18 | #include <linux/msi.h> |
| 19 | #include <linux/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/init.h> |
David S. Miller | 356d164 | 2008-08-30 00:36:11 -0700 | [diff] [blame] | 21 | #include <linux/of.h> |
| 22 | #include <linux/of_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <asm/pgtable.h> |
| 26 | #include <asm/irq.h> |
David S. Miller | e87dc35 | 2006-06-21 18:18:47 -0700 | [diff] [blame] | 27 | #include <asm/prom.h> |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 28 | #include <asm/apb.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
David S. Miller | 1e8a8cc | 2007-02-28 23:38:38 -0800 | [diff] [blame] | 30 | #include "pci_impl.h" |
Sam Ravnborg | 4ac7b826 | 2014-05-16 23:25:58 +0200 | [diff] [blame] | 31 | #include "kernel.h" |
David S. Miller | 1e8a8cc | 2007-02-28 23:38:38 -0800 | [diff] [blame] | 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | /* List of all PCI controllers found in the system. */ |
David S. Miller | 34768bc | 2007-05-07 23:06:27 -0700 | [diff] [blame] | 34 | struct pci_pbm_info *pci_pbm_root = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
David S. Miller | 6c108f1 | 2007-05-07 23:49:01 -0700 | [diff] [blame] | 36 | /* Each PBM found gets a unique index. */ |
| 37 | int pci_num_pbms = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | volatile int pci_poke_in_progress; |
| 40 | volatile int pci_poke_cpu = -1; |
| 41 | volatile int pci_poke_faulted; |
| 42 | |
| 43 | static DEFINE_SPINLOCK(pci_poke_lock); |
| 44 | |
| 45 | void 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 | |
| 67 | void 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 | |
| 89 | void 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 | |
| 111 | void 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 | |
| 130 | void 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 | |
| 149 | void 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. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 168 | static int ofpci_verbose; |
| 169 | |
| 170 | static 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 182 | static 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 Likely | cd4cd73 | 2010-07-22 16:04:30 -0600 | [diff] [blame] | 202 | static void pci_parse_of_addrs(struct platform_device *op, |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 203 | 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. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 213 | if (ofpci_verbose) |
| 214 | printk(" parse addresses (%d bytes) @ %p\n", |
| 215 | proplen, addrs); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 216 | 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. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 226 | if (ofpci_verbose) |
Sam Ravnborg | 9018113 | 2009-01-06 13:19:28 -0800 | [diff] [blame] | 227 | printk(" start: %llx, end: %llx, i: %x\n", |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 228 | op_res->start, op_res->end, i); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 229 | |
| 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 Williams | 92b19ff | 2015-08-10 23:07:06 -0400 | [diff] [blame] | 234 | flags |= IORESOURCE_READONLY | IORESOURCE_SIZEALIGN; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 235 | } 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. Miller | 77d10d0 | 2008-09-11 23:57:40 -0700 | [diff] [blame] | 246 | static 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 249 | { |
| 250 | struct dev_archdata *sd; |
Grant Likely | cd4cd73 | 2010-07-22 16:04:30 -0600 | [diff] [blame] | 251 | struct platform_device *op; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 252 | struct pci_dev *dev; |
| 253 | const char *type; |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 254 | u32 class; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 255 | |
Gu Zheng | 8b1fce0 | 2013-05-25 21:48:31 +0800 | [diff] [blame] | 256 | dev = pci_alloc_dev(bus); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 257 | 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. Miller | ae05f87 | 2008-08-29 22:42:34 -0700 | [diff] [blame] | 264 | sd->op = op = of_find_device_by_node(node); |
David S. Miller | c1b1a5f1 | 2008-03-19 04:52:48 -0700 | [diff] [blame] | 265 | sd->numa_node = pbm->numa_node; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 266 | |
David S. Miller | ae05f87 | 2008-08-29 22:42:34 -0700 | [diff] [blame] | 267 | sd = &op->dev.archdata; |
David S. Miller | ad7ad57 | 2007-07-27 22:39:14 -0700 | [diff] [blame] | 268 | sd->iommu = pbm->iommu; |
| 269 | sd->stc = &pbm->stc; |
David S. Miller | c1b1a5f1 | 2008-03-19 04:52:48 -0700 | [diff] [blame] | 270 | sd->numa_node = pbm->numa_node; |
David S. Miller | ad7ad57 | 2007-07-27 22:39:14 -0700 | [diff] [blame] | 271 | |
David S. Miller | ae05f87 | 2008-08-29 22:42:34 -0700 | [diff] [blame] | 272 | if (!strcmp(node->name, "ebus")) |
| 273 | of_propagate_archdata(op); |
| 274 | |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 275 | type = of_get_property(node, "device_type", NULL); |
| 276 | if (type == NULL) |
| 277 | type = ""; |
| 278 | |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 279 | if (ofpci_verbose) |
| 280 | printk(" create device, devfn: %x, type: %s\n", |
| 281 | devfn, type); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 282 | |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 283 | dev->sysdata = node; |
| 284 | dev->dev.parent = bus->bridge; |
| 285 | dev->dev.bus = &pci_bus_type; |
Benjamin Herrenschmidt | 98d9f30c8 | 2011-04-11 11:37:07 +1000 | [diff] [blame] | 286 | dev->dev.of_node = of_node_get(node); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 287 | dev->devfn = devfn; |
| 288 | dev->multifunction = 0; /* maybe a lie? */ |
David S. Miller | 172d2d0 | 2010-02-17 16:42:08 -0800 | [diff] [blame] | 289 | set_pcie_port_type(dev); |
| 290 | |
Yijing Wang | 017ffe6 | 2015-07-17 17:16:32 +0800 | [diff] [blame] | 291 | pci_dev_assign_slot(dev); |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 292 | 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 298 | |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 299 | dev->cfg_size = pci_cfg_space_size(dev); |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 300 | |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 301 | /* 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. Miller | 28f57e7 | 2007-03-12 19:40:26 -0700 | [diff] [blame] | 310 | |
Greg Kroah-Hartman | 2222c31 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 311 | dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus), |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 312 | dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); |
| 313 | |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 314 | if (ofpci_verbose) |
| 315 | printk(" class: 0x%x device name: %s\n", |
| 316 | dev->class, pci_name(dev)); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 317 | |
David S. Miller | 861fe90 | 2007-05-02 17:31:36 -0700 | [diff] [blame] | 318 | /* 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 Helgaas | de7f2b1 | 2013-05-20 17:15:20 -0600 | [diff] [blame] | 325 | dev->current_state = PCI_UNKNOWN; /* unknown power state */ |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 326 | dev->error_state = pci_channel_io_normal; |
David S. Miller | 172d2d0 | 2010-02-17 16:42:08 -0800 | [diff] [blame] | 327 | dev->dma_mask = 0xffffffff; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 328 | |
David S. Miller | 44b50e5 | 2008-09-22 15:42:24 -0700 | [diff] [blame] | 329 | if (!strcmp(node->name, "pci")) { |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 330 | /* a PCI-PCI bridge */ |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 331 | dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; |
| 332 | dev->rom_base_reg = PCI_ROM_ADDRESS1; |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 333 | } else if (!strcmp(type, "cardbus")) { |
| 334 | dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 335 | } else { |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 336 | dev->hdr_type = PCI_HEADER_TYPE_NORMAL; |
| 337 | dev->rom_base_reg = PCI_ROM_ADDRESS; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 338 | |
Grant Likely | 1636f8a | 2010-06-18 11:09:58 -0600 | [diff] [blame] | 339 | dev->irq = sd->op->archdata.irqs[0]; |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 340 | if (dev->irq == 0xffffffff) |
| 341 | dev->irq = PCI_IRQ_NONE; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 342 | } |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 343 | |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 344 | pci_parse_of_addrs(sd->op, node, dev); |
| 345 | |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 346 | if (ofpci_verbose) |
| 347 | printk(" adding to system ...\n"); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 348 | |
| 349 | pci_device_add(dev, bus); |
| 350 | |
| 351 | return dev; |
| 352 | } |
| 353 | |
Sam Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 354 | static void apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p) |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 355 | { |
| 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 Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 376 | static void apb_fake_ranges(struct pci_dev *dev, |
| 377 | struct pci_bus *bus, |
| 378 | struct pci_pbm_info *pbm) |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 379 | { |
Bjorn Helgaas | a031589b | 2012-03-16 17:48:24 -0600 | [diff] [blame] | 380 | struct pci_bus_region region; |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 381 | 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. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 388 | res->flags = IORESOURCE_IO; |
Bjorn Helgaas | a031589b | 2012-03-16 17:48:24 -0600 | [diff] [blame] | 389 | region.start = (first << 21); |
| 390 | region.end = (last << 21) + ((1 << 21) - 1); |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 391 | pcibios_bus_to_resource(dev->bus, res, ®ion); |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 392 | |
| 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. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 396 | res->flags = IORESOURCE_MEM; |
oftedal | 557fc58 | 2013-10-18 22:28:29 +0200 | [diff] [blame] | 397 | region.start = (first << 29); |
| 398 | region.end = (last << 29) + ((1 << 29) - 1); |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 399 | pcibios_bus_to_resource(dev->bus, res, ®ion); |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 400 | } |
| 401 | |
Sam Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 402 | static void pci_of_scan_bus(struct pci_pbm_info *pbm, |
| 403 | struct device_node *node, |
| 404 | struct pci_bus *bus); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 405 | |
| 406 | #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1]) |
| 407 | |
Sam Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 408 | static void of_scan_pci_bridge(struct pci_pbm_info *pbm, |
| 409 | struct device_node *node, |
| 410 | struct pci_dev *dev) |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 411 | { |
| 412 | struct pci_bus *bus; |
| 413 | const u32 *busrange, *ranges; |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 414 | int len, i, simba; |
Bjorn Helgaas | a031589b | 2012-03-16 17:48:24 -0600 | [diff] [blame] | 415 | struct pci_bus_region region; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 416 | struct resource *res; |
| 417 | unsigned int flags; |
| 418 | u64 size; |
| 419 | |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 420 | if (ofpci_verbose) |
| 421 | printk("of_scan_pci_bridge(%s)\n", node->full_name); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 422 | |
| 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. Miller | 93a6423 | 2014-08-12 23:22:39 -0700 | [diff] [blame] | 430 | |
| 431 | if (ofpci_verbose) |
| 432 | printk(" Bridge bus range [%u --> %u]\n", |
| 433 | busrange[0], busrange[1]); |
| 434 | |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 435 | ranges = of_get_property(node, "ranges", &len); |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 436 | simba = 0; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 437 | if (ranges == NULL) { |
David S. Miller | a165b42 | 2007-03-29 01:50:16 -0700 | [diff] [blame] | 438 | const char *model = of_get_property(node, "model", NULL); |
David S. Miller | 8c2786c | 2007-06-07 21:59:44 -0700 | [diff] [blame] | 439 | if (model && !strcmp(model, "SUNW,simba")) |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 440 | simba = 1; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 441 | } |
| 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 Lu | 3f1b540d | 2012-05-17 18:51:12 -0700 | [diff] [blame] | 451 | pci_bus_insert_busn_res(bus, busrange[0], busrange[1]); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 452 | bus->bridge_ctl = 0; |
| 453 | |
David S. Miller | 93a6423 | 2014-08-12 23:22:39 -0700 | [diff] [blame] | 454 | if (ofpci_verbose) |
| 455 | printk(" Bridge ranges[%p] simba[%d]\n", |
| 456 | ranges, simba); |
| 457 | |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 458 | /* parse ranges property, or cook one up by hand for Simba */ |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 459 | /* 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. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 466 | if (simba) { |
| 467 | apb_fake_ranges(dev, bus, pbm); |
David S. Miller | 8c2786c | 2007-06-07 21:59:44 -0700 | [diff] [blame] | 468 | goto after_ranges; |
| 469 | } else if (ranges == NULL) { |
Bjorn Helgaas | 1c97593 | 2012-07-09 13:39:52 -0600 | [diff] [blame] | 470 | pci_read_bridge_bases(bus); |
David S. Miller | 8c2786c | 2007-06-07 21:59:44 -0700 | [diff] [blame] | 471 | goto after_ranges; |
David S. Miller | 01f94c4 | 2007-03-04 12:53:19 -0800 | [diff] [blame] | 472 | } |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 473 | i = 1; |
| 474 | for (; len >= 32; len -= 32, ranges += 8) { |
David S. Miller | 93a6423 | 2014-08-12 23:22:39 -0700 | [diff] [blame] | 475 | 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 483 | flags = pci_parse_of_flags(ranges[0]); |
| 484 | size = GET_64BIT(ranges, 6); |
| 485 | if (flags == 0 || size == 0) |
| 486 | continue; |
David S. Miller | 4afba24 | 2014-08-12 23:27:01 -0700 | [diff] [blame] | 487 | |
| 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 498 | 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 505 | } 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 513 | } |
| 514 | |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 515 | res->flags = flags; |
David S. Miller | 93a6423 | 2014-08-12 23:22:39 -0700 | [diff] [blame] | 516 | region.start = start = GET_64BIT(ranges, 1); |
Bjorn Helgaas | a031589b | 2012-03-16 17:48:24 -0600 | [diff] [blame] | 517 | region.end = region.start + size - 1; |
David S. Miller | 93a6423 | 2014-08-12 23:22:39 -0700 | [diff] [blame] | 518 | |
| 519 | if (ofpci_verbose) |
| 520 | printk(" Using flags[%08x] start[%016llx] size[%016llx]\n", |
| 521 | flags, start, size); |
| 522 | |
Yinghai Lu | fc27985 | 2013-12-09 22:54:40 -0800 | [diff] [blame] | 523 | pcibios_bus_to_resource(dev->bus, res, ®ion); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 524 | } |
David S. Miller | 8c2786c | 2007-06-07 21:59:44 -0700 | [diff] [blame] | 525 | after_ranges: |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 526 | sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), |
| 527 | bus->number); |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 528 | if (ofpci_verbose) |
| 529 | printk(" bus name: %s\n", bus->name); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 530 | |
| 531 | pci_of_scan_bus(pbm, node, bus); |
| 532 | } |
| 533 | |
Sam Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 534 | static void pci_of_scan_bus(struct pci_pbm_info *pbm, |
| 535 | struct device_node *node, |
| 536 | struct pci_bus *bus) |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 537 | { |
| 538 | struct device_node *child; |
| 539 | const u32 *reg; |
David S. Miller | 2cc7345 | 2007-09-12 10:15:59 +0200 | [diff] [blame] | 540 | int reglen, devfn, prev_devfn; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 541 | struct pci_dev *dev; |
| 542 | |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 543 | if (ofpci_verbose) |
| 544 | printk("PCI: scan_bus[%s] bus no %d\n", |
| 545 | node->full_name, bus->number); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 546 | |
| 547 | child = NULL; |
David S. Miller | 2cc7345 | 2007-09-12 10:15:59 +0200 | [diff] [blame] | 548 | prev_devfn = -1; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 549 | while ((child = of_get_next_child(node, child)) != NULL) { |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 550 | if (ofpci_verbose) |
| 551 | printk(" * %s\n", child->full_name); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 552 | reg = of_get_property(child, "reg", ®len); |
| 553 | if (reg == NULL || reglen < 20) |
| 554 | continue; |
David S. Miller | 2cc7345 | 2007-09-12 10:15:59 +0200 | [diff] [blame] | 555 | |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 556 | devfn = (reg[0] >> 8) & 0xff; |
| 557 | |
David S. Miller | 2cc7345 | 2007-09-12 10:15:59 +0200 | [diff] [blame] | 558 | /* 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 567 | /* create a new pci_dev for this device */ |
David S. Miller | c26d3c0 | 2008-05-01 01:12:40 -0700 | [diff] [blame] | 568 | dev = of_create_pci_dev(pbm, child, bus, devfn); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 569 | if (!dev) |
| 570 | continue; |
David S. Miller | 5840fc6 | 2007-05-22 01:24:14 -0700 | [diff] [blame] | 571 | if (ofpci_verbose) |
| 572 | printk("PCI: dev header type: %x\n", |
| 573 | dev->hdr_type); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 574 | |
Yijing Wang | 2f22e68 | 2014-05-04 12:23:42 +0800 | [diff] [blame] | 575 | if (pci_is_bridge(dev)) |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 576 | of_scan_pci_bridge(pbm, child, dev); |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | static ssize_t |
| 581 | show_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 Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 587 | dp = pdev->dev.of_node; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 588 | |
| 589 | return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name); |
| 590 | } |
| 591 | |
| 592 | static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL); |
| 593 | |
Sam Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 594 | static void pci_bus_register_of_sysfs(struct pci_bus *bus) |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 595 | { |
| 596 | struct pci_dev *dev; |
David S. Miller | a378fd0 | 2007-03-01 11:46:13 -0800 | [diff] [blame] | 597 | struct pci_bus *child_bus; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 598 | 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. Miller | c6fee08 | 2011-02-26 23:40:02 -0800 | [diff] [blame] | 609 | (void) err; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 610 | } |
David S. Miller | a378fd0 | 2007-03-01 11:46:13 -0800 | [diff] [blame] | 611 | list_for_each_entry(child_bus, &bus->children, node) |
| 612 | pci_bus_register_of_sysfs(child_bus); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 613 | } |
| 614 | |
David S. Miller | f1d25d3 | 2014-08-12 23:29:09 -0700 | [diff] [blame] | 615 | static 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 Helgaas | d10b730 | 2015-04-08 10:04:55 -0500 | [diff] [blame] | 637 | pci_claim_resource(dev, i); |
David S. Miller | f1d25d3 | 2014-08-12 23:29:09 -0700 | [diff] [blame] | 638 | } |
| 639 | } |
| 640 | |
| 641 | list_for_each_entry(child_bus, &bus->children, node) |
| 642 | pci_claim_bus_resources(child_bus); |
| 643 | } |
| 644 | |
Sam Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 645 | struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, |
| 646 | struct device *parent) |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 647 | { |
Bjorn Helgaas | 1a30010 | 2011-10-28 16:27:53 -0600 | [diff] [blame] | 648 | LIST_HEAD(resources); |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 649 | struct device_node *node = pbm->op->dev.of_node; |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 650 | struct pci_bus *bus; |
| 651 | |
| 652 | printk("PCI: Scanning PBM %s\n", node->full_name); |
| 653 | |
Bjorn Helgaas | ac1edcc | 2012-02-23 20:19:04 -0700 | [diff] [blame] | 654 | 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 Lu | 3f1b540d | 2012-05-17 18:51:12 -0700 | [diff] [blame] | 658 | 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 Helgaas | 1a30010 | 2011-10-28 16:27:53 -0600 | [diff] [blame] | 662 | bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops, |
| 663 | pbm, &resources); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 664 | if (!bus) { |
| 665 | printk(KERN_ERR "Failed to create bus for %s\n", |
| 666 | node->full_name); |
Bjorn Helgaas | 1a30010 | 2011-10-28 16:27:53 -0600 | [diff] [blame] | 667 | pci_free_resource_list(&resources); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 668 | return NULL; |
| 669 | } |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 670 | |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 671 | pci_of_scan_bus(pbm, node, bus); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 672 | pci_bus_register_of_sysfs(bus); |
| 673 | |
David S. Miller | f1d25d3 | 2014-08-12 23:29:09 -0700 | [diff] [blame] | 674 | pci_claim_bus_resources(bus); |
Yijing Wang | a0c8a4d | 2015-03-12 15:05:56 -0500 | [diff] [blame] | 675 | pci_bus_add_devices(bus); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 676 | return bus; |
| 677 | } |
| 678 | |
Sam Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 679 | void pcibios_fixup_bus(struct pci_bus *pbus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | } |
| 682 | |
Dominik Brodowski | 3b7a17f | 2010-01-01 17:40:50 +0100 | [diff] [blame] | 683 | resource_size_t pcibios_align_resource(void *data, const struct resource *res, |
Dominik Brodowski | b26b2d4 | 2010-01-01 17:40:49 +0100 | [diff] [blame] | 684 | resource_size_t size, resource_size_t align) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | { |
Dominik Brodowski | b26b2d4 | 2010-01-01 17:40:49 +0100 | [diff] [blame] | 686 | return res->start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | } |
| 688 | |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 689 | int pcibios_enable_device(struct pci_dev *dev, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | { |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 691 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | return 0; |
| 717 | } |
| 718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | /* 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 | */ |
| 728 | static 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. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 731 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | unsigned long space_size, user_offset, user_size; |
| 733 | |
David S. Miller | 3875c5c | 2007-03-08 22:52:11 -0800 | [diff] [blame] | 734 | if (mmap_state == pci_mmap_io) { |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 735 | space_size = resource_size(&pbm->io_space); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } else { |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 737 | space_size = resource_size(&pbm->mem_space); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } |
| 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. Miller | 3875c5c | 2007-03-08 22:52:11 -0800 | [diff] [blame] | 748 | if (mmap_state == pci_mmap_io) { |
| 749 | vma->vm_pgoff = (pbm->io_space.start + |
| 750 | user_offset) >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | } else { |
David S. Miller | 3875c5c | 2007-03-08 22:52:11 -0800 | [diff] [blame] | 752 | vma->vm_pgoff = (pbm->mem_space.start + |
| 753 | user_offset) >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | } |
| 755 | |
| 756 | return 0; |
| 757 | } |
| 758 | |
David S. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 759 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | * |
| 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. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 769 | static int __pci_mmap_make_offset(struct pci_dev *pdev, |
| 770 | struct vm_area_struct *vma, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | enum pci_mmap_state mmap_state) |
| 772 | { |
David S. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 773 | unsigned long user_paddr, user_size; |
| 774 | int i, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
David S. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 776 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | |
David S. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 784 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | for (i = 0; i <= PCI_ROM_RESOURCE; i++) { |
David S. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 797 | struct resource *rp = &pdev->resource[i]; |
Max Dmitrichenko | 5769907 | 2008-11-02 00:34:10 -0700 | [diff] [blame] | 798 | resource_size_t aligned_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
| 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 Dmitrichenko | 5769907 | 2008-11-02 00:34:10 -0700 | [diff] [blame] | 816 | /* 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. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 823 | if ((rp->start <= user_paddr) && |
Max Dmitrichenko | 5769907 | 2008-11-02 00:34:10 -0700 | [diff] [blame] | 824 | (user_paddr + user_size) <= aligned_end) |
David S. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 825 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | } |
| 827 | |
David S. Miller | bbe0b5e | 2007-10-11 15:41:01 -0700 | [diff] [blame] | 828 | if (i > PCI_ROM_RESOURCE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | return -EINVAL; |
| 830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | return 0; |
| 832 | } |
| 833 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci |
| 835 | * device mapping. |
| 836 | */ |
| 837 | static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma, |
| 838 | enum pci_mmap_state mmap_state) |
| 839 | { |
David S. Miller | a7a6cac | 2005-09-01 21:51:26 -0700 | [diff] [blame] | 840 | /* Our io_remap_pfn_range takes care of this, do nothing. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | } |
| 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 | */ |
| 851 | int 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | __pci_mmap_set_pgprot(dev, vma, mmap_state); |
| 862 | |
David S. Miller | 14778d9 | 2006-03-21 02:29:39 -0800 | [diff] [blame] | 863 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | return 0; |
| 872 | } |
| 873 | |
David S. Miller | c1b1a5f1 | 2008-03-19 04:52:48 -0700 | [diff] [blame] | 874 | #ifdef CONFIG_NUMA |
| 875 | int pcibus_to_node(struct pci_bus *pbus) |
| 876 | { |
| 877 | struct pci_pbm_info *pbm = pbus->sysdata; |
| 878 | |
| 879 | return pbm->numa_node; |
| 880 | } |
| 881 | EXPORT_SYMBOL(pcibus_to_node); |
| 882 | #endif |
| 883 | |
David S. Miller | d3ae4b5 | 2008-09-09 23:54:02 -0700 | [diff] [blame] | 884 | /* Return the domain number for this pci bus */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
| 886 | int pci_domain_nr(struct pci_bus *pbus) |
| 887 | { |
| 888 | struct pci_pbm_info *pbm = pbus->sysdata; |
| 889 | int ret; |
| 890 | |
David S. Miller | d3ae4b5 | 2008-09-09 23:54:02 -0700 | [diff] [blame] | 891 | if (!pbm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | ret = -ENXIO; |
| 893 | } else { |
David S. Miller | 6c108f1 | 2007-05-07 23:49:01 -0700 | [diff] [blame] | 894 | ret = pbm->index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | } |
| 896 | |
| 897 | return ret; |
| 898 | } |
| 899 | EXPORT_SYMBOL(pci_domain_nr); |
| 900 | |
David S. Miller | 35a17eb | 2007-02-10 17:41:02 -0800 | [diff] [blame] | 901 | #ifdef CONFIG_PCI_MSI |
| 902 | int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) |
| 903 | { |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 904 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; |
Sam Ravnborg | 44ed3c0 | 2011-01-22 11:32:20 +0000 | [diff] [blame] | 905 | unsigned int irq; |
David S. Miller | 35a17eb | 2007-02-10 17:41:02 -0800 | [diff] [blame] | 906 | |
David S. Miller | e9870c4 | 2007-05-07 23:28:50 -0700 | [diff] [blame] | 907 | if (!pbm->setup_msi_irq) |
David S. Miller | 35a17eb | 2007-02-10 17:41:02 -0800 | [diff] [blame] | 908 | return -EINVAL; |
| 909 | |
Sam Ravnborg | 44ed3c0 | 2011-01-22 11:32:20 +0000 | [diff] [blame] | 910 | return pbm->setup_msi_irq(&irq, pdev, desc); |
David S. Miller | 35a17eb | 2007-02-10 17:41:02 -0800 | [diff] [blame] | 911 | } |
| 912 | |
Sam Ravnborg | 44ed3c0 | 2011-01-22 11:32:20 +0000 | [diff] [blame] | 913 | void arch_teardown_msi_irq(unsigned int irq) |
David S. Miller | 35a17eb | 2007-02-10 17:41:02 -0800 | [diff] [blame] | 914 | { |
Thomas Gleixner | 394d441 | 2011-03-24 17:52:54 +0100 | [diff] [blame] | 915 | struct msi_desc *entry = irq_get_msi_desc(irq); |
Jiang Liu | 3bf15f5 | 2015-07-09 16:00:42 +0800 | [diff] [blame] | 916 | struct pci_dev *pdev = msi_desc_to_pci_dev(entry); |
David S. Miller | a2fb23a | 2007-02-28 23:35:04 -0800 | [diff] [blame] | 917 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; |
David S. Miller | 35a17eb | 2007-02-10 17:41:02 -0800 | [diff] [blame] | 918 | |
David S. Miller | 77d10d0 | 2008-09-11 23:57:40 -0700 | [diff] [blame] | 919 | if (pbm->teardown_msi_irq) |
Sam Ravnborg | 44ed3c0 | 2011-01-22 11:32:20 +0000 | [diff] [blame] | 920 | pbm->teardown_msi_irq(irq, pdev); |
David S. Miller | 35a17eb | 2007-02-10 17:41:02 -0800 | [diff] [blame] | 921 | } |
| 922 | #endif /* !(CONFIG_PCI_MSI) */ |
| 923 | |
David S. Miller | ad7ad57 | 2007-07-27 22:39:14 -0700 | [diff] [blame] | 924 | static 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 Tomonori | ee664a9 | 2009-08-10 11:53:16 +0900 | [diff] [blame] | 945 | int pci64_dma_supported(struct pci_dev *pdev, u64 device_mask) |
David S. Miller | ad7ad57 | 2007-07-27 22:39:14 -0700 | [diff] [blame] | 946 | { |
| 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. Miller | bcea1db | 2007-12-25 02:20:33 -0800 | [diff] [blame] | 971 | void 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 Heo | 4c0eec7 | 2009-09-22 17:34:17 +0900 | [diff] [blame] | 986 | |
Myron Stowe | ba232a1 | 2011-10-28 15:48:10 -0600 | [diff] [blame] | 987 | void pcibios_set_master(struct pci_dev *dev) |
| 988 | { |
| 989 | /* No special bus mastering setup handling */ |
| 990 | } |
| 991 | |
Tejun Heo | 4c0eec7 | 2009-09-22 17:34:17 +0900 | [diff] [blame] | 992 | static int __init pcibios_init(void) |
| 993 | { |
| 994 | pci_dfl_cache_line_size = 64 >> 2; |
| 995 | return 0; |
| 996 | } |
| 997 | subsys_initcall(pcibios_init); |
David S. Miller | 2ef2d74 | 2010-02-20 19:53:55 -0800 | [diff] [blame] | 998 | |
| 999 | #ifdef CONFIG_SYSFS |
Eric Snowberg | f0c1a11 | 2015-05-27 11:59:19 -0400 | [diff] [blame] | 1000 | |
| 1001 | #define SLOT_NAME_SIZE 11 /* Max decimal digits + null in u32 */ |
| 1002 | |
| 1003 | static 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 Ravnborg | b7c13f7 | 2013-01-01 16:02:33 +0100 | [diff] [blame] | 1032 | static void pci_bus_slot_names(struct device_node *node, struct pci_bus *bus) |
David S. Miller | 2ef2d74 | 2010-02-20 19:53:55 -0800 | [diff] [blame] | 1033 | { |
| 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 | |
| 1077 | static 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 Snowberg | f0c1a11 | 2015-05-27 11:59:19 -0400 | [diff] [blame] | 1083 | struct pci_dev *pdev; |
David S. Miller | 2ef2d74 | 2010-02-20 19:53:55 -0800 | [diff] [blame] | 1084 | |
Eric Snowberg | f0c1a11 | 2015-05-27 11:59:19 -0400 | [diff] [blame] | 1085 | 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. Miller | 2ef2d74 | 2010-02-20 19:53:55 -0800 | [diff] [blame] | 1090 | } else { |
David S. Miller | 2ef2d74 | 2010-02-20 19:53:55 -0800 | [diff] [blame] | 1091 | |
Eric Snowberg | f0c1a11 | 2015-05-27 11:59:19 -0400 | [diff] [blame] | 1092 | 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. Miller | 2ef2d74 | 2010-02-20 19:53:55 -0800 | [diff] [blame] | 1105 | } |
David S. Miller | 2ef2d74 | 2010-02-20 19:53:55 -0800 | [diff] [blame] | 1106 | } |
| 1107 | |
| 1108 | return 0; |
| 1109 | } |
Paul Gortmaker | 1b925b5 | 2014-01-12 13:07:30 -0500 | [diff] [blame] | 1110 | device_initcall(of_pci_slot_init); |
David S. Miller | 2ef2d74 | 2010-02-20 19:53:55 -0800 | [diff] [blame] | 1111 | #endif |