Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pci.c - Low-Level PCI Access in IA-64 |
| 3 | * |
| 4 | * Derived from bios32.c of i386 tree. |
| 5 | * |
| 6 | * (c) Copyright 2002, 2005 Hewlett-Packard Development Company, L.P. |
| 7 | * David Mosberger-Tang <davidm@hpl.hp.com> |
| 8 | * Bjorn Helgaas <bjorn.helgaas@hp.com> |
| 9 | * Copyright (C) 2004 Silicon Graphics, Inc. |
| 10 | * |
| 11 | * Note: Above list of copyright holders is incomplete... |
| 12 | */ |
| 13 | #include <linux/config.h> |
| 14 | |
| 15 | #include <linux/acpi.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/pci.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/ioport.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/smp_lock.h> |
| 23 | #include <linux/spinlock.h> |
| 24 | |
| 25 | #include <asm/machvec.h> |
| 26 | #include <asm/page.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/system.h> |
| 28 | #include <asm/io.h> |
| 29 | #include <asm/sal.h> |
| 30 | #include <asm/smp.h> |
| 31 | #include <asm/irq.h> |
| 32 | #include <asm/hw_irq.h> |
| 33 | |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | /* |
| 36 | * Low-level SAL-based PCI configuration access functions. Note that SAL |
| 37 | * calls are already serialized (via sal_lock), so we don't need another |
| 38 | * synchronization mechanism here. |
| 39 | */ |
| 40 | |
| 41 | #define PCI_SAL_ADDRESS(seg, bus, devfn, reg) \ |
| 42 | (((u64) seg << 24) | (bus << 16) | (devfn << 8) | (reg)) |
| 43 | |
| 44 | /* SAL 3.2 adds support for extended config space. */ |
| 45 | |
| 46 | #define PCI_SAL_EXT_ADDRESS(seg, bus, devfn, reg) \ |
| 47 | (((u64) seg << 28) | (bus << 20) | (devfn << 12) | (reg)) |
| 48 | |
| 49 | static int |
| 50 | pci_sal_read (unsigned int seg, unsigned int bus, unsigned int devfn, |
| 51 | int reg, int len, u32 *value) |
| 52 | { |
| 53 | u64 addr, data = 0; |
| 54 | int mode, result; |
| 55 | |
| 56 | if (!value || (seg > 65535) || (bus > 255) || (devfn > 255) || (reg > 4095)) |
| 57 | return -EINVAL; |
| 58 | |
| 59 | if ((seg | reg) <= 255) { |
| 60 | addr = PCI_SAL_ADDRESS(seg, bus, devfn, reg); |
| 61 | mode = 0; |
| 62 | } else { |
| 63 | addr = PCI_SAL_EXT_ADDRESS(seg, bus, devfn, reg); |
| 64 | mode = 1; |
| 65 | } |
| 66 | result = ia64_sal_pci_config_read(addr, mode, len, &data); |
| 67 | if (result != 0) |
| 68 | return -EINVAL; |
| 69 | |
| 70 | *value = (u32) data; |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | static int |
| 75 | pci_sal_write (unsigned int seg, unsigned int bus, unsigned int devfn, |
| 76 | int reg, int len, u32 value) |
| 77 | { |
| 78 | u64 addr; |
| 79 | int mode, result; |
| 80 | |
| 81 | if ((seg > 65535) || (bus > 255) || (devfn > 255) || (reg > 4095)) |
| 82 | return -EINVAL; |
| 83 | |
| 84 | if ((seg | reg) <= 255) { |
| 85 | addr = PCI_SAL_ADDRESS(seg, bus, devfn, reg); |
| 86 | mode = 0; |
| 87 | } else { |
| 88 | addr = PCI_SAL_EXT_ADDRESS(seg, bus, devfn, reg); |
| 89 | mode = 1; |
| 90 | } |
| 91 | result = ia64_sal_pci_config_write(addr, mode, len, value); |
| 92 | if (result != 0) |
| 93 | return -EINVAL; |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | static struct pci_raw_ops pci_sal_ops = { |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 98 | .read = pci_sal_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | .write = pci_sal_write |
| 100 | }; |
| 101 | |
| 102 | struct pci_raw_ops *raw_pci_ops = &pci_sal_ops; |
| 103 | |
| 104 | static int |
| 105 | pci_read (struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value) |
| 106 | { |
| 107 | return raw_pci_ops->read(pci_domain_nr(bus), bus->number, |
| 108 | devfn, where, size, value); |
| 109 | } |
| 110 | |
| 111 | static int |
| 112 | pci_write (struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value) |
| 113 | { |
| 114 | return raw_pci_ops->write(pci_domain_nr(bus), bus->number, |
| 115 | devfn, where, size, value); |
| 116 | } |
| 117 | |
| 118 | struct pci_ops pci_root_ops = { |
| 119 | .read = pci_read, |
| 120 | .write = pci_write, |
| 121 | }; |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | /* Called by ACPI when it finds a new root bus. */ |
| 124 | |
| 125 | static struct pci_controller * __devinit |
| 126 | alloc_pci_controller (int seg) |
| 127 | { |
| 128 | struct pci_controller *controller; |
| 129 | |
| 130 | controller = kmalloc(sizeof(*controller), GFP_KERNEL); |
| 131 | if (!controller) |
| 132 | return NULL; |
| 133 | |
| 134 | memset(controller, 0, sizeof(*controller)); |
| 135 | controller->segment = seg; |
Christoph Lameter | 514604c | 2005-07-07 16:59:00 -0700 | [diff] [blame] | 136 | controller->node = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | return controller; |
| 138 | } |
| 139 | |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 140 | struct pci_root_info { |
| 141 | struct pci_controller *controller; |
| 142 | char *name; |
| 143 | }; |
| 144 | |
| 145 | static unsigned int |
| 146 | new_space (u64 phys_base, int sparse) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | { |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 148 | u64 mmio_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | int i; |
| 150 | |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 151 | if (phys_base == 0) |
| 152 | return 0; /* legacy I/O port space */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 154 | mmio_base = (u64) ioremap(phys_base, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | for (i = 0; i < num_io_spaces; i++) |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 156 | if (io_space[i].mmio_base == mmio_base && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | io_space[i].sparse == sparse) |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 158 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | if (num_io_spaces == MAX_IO_SPACES) { |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 161 | printk(KERN_ERR "PCI: Too many IO port spaces " |
| 162 | "(MAX_IO_SPACES=%lu)\n", MAX_IO_SPACES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | return ~0; |
| 164 | } |
| 165 | |
| 166 | i = num_io_spaces++; |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 167 | io_space[i].mmio_base = mmio_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | io_space[i].sparse = sparse; |
| 169 | |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 170 | return i; |
| 171 | } |
| 172 | |
| 173 | static u64 __devinit |
| 174 | add_io_space (struct pci_root_info *info, struct acpi_resource_address64 *addr) |
| 175 | { |
| 176 | struct resource *resource; |
| 177 | char *name; |
| 178 | u64 base, min, max, base_port; |
| 179 | unsigned int sparse = 0, space_nr, len; |
| 180 | |
| 181 | resource = kzalloc(sizeof(*resource), GFP_KERNEL); |
| 182 | if (!resource) { |
| 183 | printk(KERN_ERR "PCI: No memory for %s I/O port space\n", |
| 184 | info->name); |
| 185 | goto out; |
| 186 | } |
| 187 | |
| 188 | len = strlen(info->name) + 32; |
| 189 | name = kzalloc(len, GFP_KERNEL); |
| 190 | if (!name) { |
| 191 | printk(KERN_ERR "PCI: No memory for %s I/O port space name\n", |
| 192 | info->name); |
| 193 | goto free_resource; |
| 194 | } |
| 195 | |
| 196 | min = addr->min_address_range; |
| 197 | max = min + addr->address_length - 1; |
| 198 | if (addr->attribute.io.translation_attribute == ACPI_SPARSE_TRANSLATION) |
| 199 | sparse = 1; |
| 200 | |
| 201 | space_nr = new_space(addr->address_translation_offset, sparse); |
| 202 | if (space_nr == ~0) |
| 203 | goto free_name; |
| 204 | |
| 205 | base = __pa(io_space[space_nr].mmio_base); |
| 206 | base_port = IO_SPACE_BASE(space_nr); |
| 207 | snprintf(name, len, "%s I/O Ports %08lx-%08lx", info->name, |
| 208 | base_port + min, base_port + max); |
| 209 | |
| 210 | /* |
| 211 | * The SDM guarantees the legacy 0-64K space is sparse, but if the |
| 212 | * mapping is done by the processor (not the bridge), ACPI may not |
| 213 | * mark it as sparse. |
| 214 | */ |
| 215 | if (space_nr == 0) |
| 216 | sparse = 1; |
| 217 | |
| 218 | resource->name = name; |
| 219 | resource->flags = IORESOURCE_MEM; |
| 220 | resource->start = base + (sparse ? IO_SPACE_SPARSE_ENCODING(min) : min); |
| 221 | resource->end = base + (sparse ? IO_SPACE_SPARSE_ENCODING(max) : max); |
| 222 | insert_resource(&iomem_resource, resource); |
| 223 | |
| 224 | return base_port; |
| 225 | |
| 226 | free_name: |
| 227 | kfree(name); |
| 228 | free_resource: |
| 229 | kfree(resource); |
| 230 | out: |
| 231 | return ~0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Bjorn Helgaas | 463eb29 | 2005-09-23 11:39:07 -0600 | [diff] [blame] | 234 | static acpi_status __devinit resource_to_window(struct acpi_resource *resource, |
| 235 | struct acpi_resource_address64 *addr) |
| 236 | { |
| 237 | acpi_status status; |
| 238 | |
| 239 | /* |
| 240 | * We're only interested in _CRS descriptors that are |
| 241 | * - address space descriptors for memory or I/O space |
| 242 | * - non-zero size |
| 243 | * - producers, i.e., the address space is routed downstream, |
| 244 | * not consumed by the bridge itself |
| 245 | */ |
| 246 | status = acpi_resource_to_address64(resource, addr); |
| 247 | if (ACPI_SUCCESS(status) && |
| 248 | (addr->resource_type == ACPI_MEMORY_RANGE || |
| 249 | addr->resource_type == ACPI_IO_RANGE) && |
| 250 | addr->address_length && |
| 251 | addr->producer_consumer == ACPI_PRODUCER) |
| 252 | return AE_OK; |
| 253 | |
| 254 | return AE_ERROR; |
| 255 | } |
| 256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | static acpi_status __devinit |
| 258 | count_window (struct acpi_resource *resource, void *data) |
| 259 | { |
| 260 | unsigned int *windows = (unsigned int *) data; |
| 261 | struct acpi_resource_address64 addr; |
| 262 | acpi_status status; |
| 263 | |
Bjorn Helgaas | 463eb29 | 2005-09-23 11:39:07 -0600 | [diff] [blame] | 264 | status = resource_to_window(resource, &addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | if (ACPI_SUCCESS(status)) |
Bjorn Helgaas | 463eb29 | 2005-09-23 11:39:07 -0600 | [diff] [blame] | 266 | (*windows)++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
| 268 | return AE_OK; |
| 269 | } |
| 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | static __devinit acpi_status add_window(struct acpi_resource *res, void *data) |
| 272 | { |
| 273 | struct pci_root_info *info = data; |
| 274 | struct pci_window *window; |
| 275 | struct acpi_resource_address64 addr; |
| 276 | acpi_status status; |
| 277 | unsigned long flags, offset = 0; |
| 278 | struct resource *root; |
| 279 | |
Bjorn Helgaas | 463eb29 | 2005-09-23 11:39:07 -0600 | [diff] [blame] | 280 | /* Return AE_OK for non-window resources to keep scanning for more */ |
| 281 | status = resource_to_window(res, &addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | if (!ACPI_SUCCESS(status)) |
| 283 | return AE_OK; |
| 284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | if (addr.resource_type == ACPI_MEMORY_RANGE) { |
| 286 | flags = IORESOURCE_MEM; |
| 287 | root = &iomem_resource; |
| 288 | offset = addr.address_translation_offset; |
| 289 | } else if (addr.resource_type == ACPI_IO_RANGE) { |
| 290 | flags = IORESOURCE_IO; |
| 291 | root = &ioport_resource; |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 292 | offset = add_io_space(info, &addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | if (offset == ~0) |
| 294 | return AE_OK; |
| 295 | } else |
| 296 | return AE_OK; |
| 297 | |
| 298 | window = &info->controller->window[info->controller->windows++]; |
| 299 | window->resource.name = info->name; |
| 300 | window->resource.flags = flags; |
| 301 | window->resource.start = addr.min_address_range + offset; |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 302 | window->resource.end = window->resource.start + addr.address_length - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | window->resource.child = NULL; |
| 304 | window->offset = offset; |
| 305 | |
| 306 | if (insert_resource(root, &window->resource)) { |
| 307 | printk(KERN_ERR "alloc 0x%lx-0x%lx from %s for %s failed\n", |
| 308 | window->resource.start, window->resource.end, |
| 309 | root->name, info->name); |
| 310 | } |
| 311 | |
| 312 | return AE_OK; |
| 313 | } |
| 314 | |
| 315 | static void __devinit |
| 316 | pcibios_setup_root_windows(struct pci_bus *bus, struct pci_controller *ctrl) |
| 317 | { |
| 318 | int i, j; |
| 319 | |
| 320 | j = 0; |
| 321 | for (i = 0; i < ctrl->windows; i++) { |
| 322 | struct resource *res = &ctrl->window[i].resource; |
| 323 | /* HP's firmware has a hack to work around a Windows bug. |
| 324 | * Ignore these tiny memory ranges */ |
| 325 | if ((res->flags & IORESOURCE_MEM) && |
| 326 | (res->end - res->start < 16)) |
| 327 | continue; |
| 328 | if (j >= PCI_BUS_NUM_RESOURCES) { |
| 329 | printk("Ignoring range [%lx-%lx] (%lx)\n", res->start, |
| 330 | res->end, res->flags); |
| 331 | continue; |
| 332 | } |
| 333 | bus->resource[j++] = res; |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | struct pci_bus * __devinit |
| 338 | pci_acpi_scan_root(struct acpi_device *device, int domain, int bus) |
| 339 | { |
| 340 | struct pci_root_info info; |
| 341 | struct pci_controller *controller; |
| 342 | unsigned int windows = 0; |
| 343 | struct pci_bus *pbus; |
| 344 | char *name; |
Christoph Lameter | 514604c | 2005-07-07 16:59:00 -0700 | [diff] [blame] | 345 | int pxm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
| 347 | controller = alloc_pci_controller(domain); |
| 348 | if (!controller) |
| 349 | goto out1; |
| 350 | |
| 351 | controller->acpi_handle = device->handle; |
| 352 | |
Christoph Lameter | 514604c | 2005-07-07 16:59:00 -0700 | [diff] [blame] | 353 | pxm = acpi_get_pxm(controller->acpi_handle); |
| 354 | #ifdef CONFIG_NUMA |
| 355 | if (pxm >= 0) |
| 356 | controller->node = pxm_to_nid_map[pxm]; |
| 357 | #endif |
| 358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window, |
| 360 | &windows); |
Christoph Lameter | 514604c | 2005-07-07 16:59:00 -0700 | [diff] [blame] | 361 | controller->window = kmalloc_node(sizeof(*controller->window) * windows, |
| 362 | GFP_KERNEL, controller->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | if (!controller->window) |
| 364 | goto out2; |
| 365 | |
| 366 | name = kmalloc(16, GFP_KERNEL); |
| 367 | if (!name) |
| 368 | goto out3; |
| 369 | |
| 370 | sprintf(name, "PCI Bus %04x:%02x", domain, bus); |
| 371 | info.controller = controller; |
| 372 | info.name = name; |
| 373 | acpi_walk_resources(device->handle, METHOD_NAME__CRS, add_window, |
| 374 | &info); |
| 375 | |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 376 | pbus = pci_scan_bus_parented(NULL, bus, &pci_root_ops, controller); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | if (pbus) |
| 378 | pcibios_setup_root_windows(pbus, controller); |
| 379 | |
| 380 | return pbus; |
| 381 | |
| 382 | out3: |
| 383 | kfree(controller->window); |
| 384 | out2: |
| 385 | kfree(controller); |
| 386 | out1: |
| 387 | return NULL; |
| 388 | } |
| 389 | |
| 390 | void pcibios_resource_to_bus(struct pci_dev *dev, |
| 391 | struct pci_bus_region *region, struct resource *res) |
| 392 | { |
| 393 | struct pci_controller *controller = PCI_CONTROLLER(dev); |
| 394 | unsigned long offset = 0; |
| 395 | int i; |
| 396 | |
| 397 | for (i = 0; i < controller->windows; i++) { |
| 398 | struct pci_window *window = &controller->window[i]; |
| 399 | if (!(window->resource.flags & res->flags)) |
| 400 | continue; |
| 401 | if (window->resource.start > res->start) |
| 402 | continue; |
| 403 | if (window->resource.end < res->end) |
| 404 | continue; |
| 405 | offset = window->offset; |
| 406 | break; |
| 407 | } |
| 408 | |
| 409 | region->start = res->start - offset; |
| 410 | region->end = res->end - offset; |
| 411 | } |
| 412 | EXPORT_SYMBOL(pcibios_resource_to_bus); |
| 413 | |
| 414 | void pcibios_bus_to_resource(struct pci_dev *dev, |
| 415 | struct resource *res, struct pci_bus_region *region) |
| 416 | { |
| 417 | struct pci_controller *controller = PCI_CONTROLLER(dev); |
| 418 | unsigned long offset = 0; |
| 419 | int i; |
| 420 | |
| 421 | for (i = 0; i < controller->windows; i++) { |
| 422 | struct pci_window *window = &controller->window[i]; |
| 423 | if (!(window->resource.flags & res->flags)) |
| 424 | continue; |
| 425 | if (window->resource.start - window->offset > region->start) |
| 426 | continue; |
| 427 | if (window->resource.end - window->offset < region->end) |
| 428 | continue; |
| 429 | offset = window->offset; |
| 430 | break; |
| 431 | } |
| 432 | |
| 433 | res->start = region->start + offset; |
| 434 | res->end = region->end + offset; |
| 435 | } |
Keith Owens | 41290c1 | 2005-08-24 16:06:25 +1000 | [diff] [blame] | 436 | EXPORT_SYMBOL(pcibios_bus_to_resource); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | |
Rajesh Shah | 71c3511 | 2005-04-28 00:25:46 -0700 | [diff] [blame] | 438 | static int __devinit is_valid_resource(struct pci_dev *dev, int idx) |
| 439 | { |
| 440 | unsigned int i, type_mask = IORESOURCE_IO | IORESOURCE_MEM; |
| 441 | struct resource *devr = &dev->resource[idx]; |
| 442 | |
| 443 | if (!dev->bus) |
| 444 | return 0; |
| 445 | for (i=0; i<PCI_BUS_NUM_RESOURCES; i++) { |
| 446 | struct resource *busr = dev->bus->resource[i]; |
| 447 | |
| 448 | if (!busr || ((busr->flags ^ devr->flags) & type_mask)) |
| 449 | continue; |
| 450 | if ((devr->start) && (devr->start >= busr->start) && |
| 451 | (devr->end <= busr->end)) |
| 452 | return 1; |
| 453 | } |
| 454 | return 0; |
| 455 | } |
| 456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev) |
| 458 | { |
| 459 | struct pci_bus_region region; |
| 460 | int i; |
| 461 | int limit = (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) ? \ |
| 462 | PCI_BRIDGE_RESOURCES : PCI_NUM_RESOURCES; |
| 463 | |
| 464 | for (i = 0; i < limit; i++) { |
| 465 | if (!dev->resource[i].flags) |
| 466 | continue; |
| 467 | region.start = dev->resource[i].start; |
| 468 | region.end = dev->resource[i].end; |
| 469 | pcibios_bus_to_resource(dev, &dev->resource[i], ®ion); |
Rajesh Shah | 71c3511 | 2005-04-28 00:25:46 -0700 | [diff] [blame] | 470 | if ((is_valid_resource(dev, i))) |
| 471 | pci_claim_resource(dev, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
| 473 | } |
| 474 | |
| 475 | /* |
| 476 | * Called after each bus is probed, but before its children are examined. |
| 477 | */ |
| 478 | void __devinit |
| 479 | pcibios_fixup_bus (struct pci_bus *b) |
| 480 | { |
| 481 | struct pci_dev *dev; |
| 482 | |
Rajesh Shah | f7d473d | 2005-04-28 00:25:51 -0700 | [diff] [blame] | 483 | if (b->self) { |
| 484 | pci_read_bridge_bases(b); |
| 485 | pcibios_fixup_device_resources(b->self); |
| 486 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | list_for_each_entry(dev, &b->devices, bus_list) |
| 488 | pcibios_fixup_device_resources(dev); |
| 489 | |
| 490 | return; |
| 491 | } |
| 492 | |
| 493 | void __devinit |
| 494 | pcibios_update_irq (struct pci_dev *dev, int irq) |
| 495 | { |
| 496 | pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq); |
| 497 | |
| 498 | /* ??? FIXME -- record old value for shutdown. */ |
| 499 | } |
| 500 | |
| 501 | static inline int |
| 502 | pcibios_enable_resources (struct pci_dev *dev, int mask) |
| 503 | { |
| 504 | u16 cmd, old_cmd; |
| 505 | int idx; |
| 506 | struct resource *r; |
Rajesh Shah | fab3fb0 | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 507 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
| 509 | if (!dev) |
| 510 | return -EINVAL; |
| 511 | |
| 512 | pci_read_config_word(dev, PCI_COMMAND, &cmd); |
| 513 | old_cmd = cmd; |
Rajesh Shah | fab3fb0 | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 514 | for (idx=0; idx<PCI_NUM_RESOURCES; idx++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | /* Only set up the desired resources. */ |
| 516 | if (!(mask & (1 << idx))) |
| 517 | continue; |
| 518 | |
| 519 | r = &dev->resource[idx]; |
Rajesh Shah | fab3fb0 | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 520 | if (!(r->flags & type_mask)) |
| 521 | continue; |
| 522 | if ((idx == PCI_ROM_RESOURCE) && |
| 523 | (!(r->flags & IORESOURCE_ROM_ENABLE))) |
| 524 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | if (!r->start && r->end) { |
| 526 | printk(KERN_ERR |
| 527 | "PCI: Device %s not available because of resource collisions\n", |
| 528 | pci_name(dev)); |
| 529 | return -EINVAL; |
| 530 | } |
| 531 | if (r->flags & IORESOURCE_IO) |
| 532 | cmd |= PCI_COMMAND_IO; |
| 533 | if (r->flags & IORESOURCE_MEM) |
| 534 | cmd |= PCI_COMMAND_MEMORY; |
| 535 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | if (cmd != old_cmd) { |
| 537 | printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd); |
| 538 | pci_write_config_word(dev, PCI_COMMAND, cmd); |
| 539 | } |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | int |
| 544 | pcibios_enable_device (struct pci_dev *dev, int mask) |
| 545 | { |
| 546 | int ret; |
| 547 | |
| 548 | ret = pcibios_enable_resources(dev, mask); |
| 549 | if (ret < 0) |
| 550 | return ret; |
| 551 | |
| 552 | return acpi_pci_irq_enable(dev); |
| 553 | } |
| 554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | void |
| 556 | pcibios_disable_device (struct pci_dev *dev) |
| 557 | { |
| 558 | acpi_pci_irq_disable(dev); |
| 559 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
| 561 | void |
| 562 | pcibios_align_resource (void *data, struct resource *res, |
| 563 | unsigned long size, unsigned long align) |
| 564 | { |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * PCI BIOS setup, always defaults to SAL interface |
| 569 | */ |
| 570 | char * __init |
| 571 | pcibios_setup (char *str) |
| 572 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | return NULL; |
| 574 | } |
| 575 | |
| 576 | int |
| 577 | pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma, |
| 578 | enum pci_mmap_state mmap_state, int write_combine) |
| 579 | { |
| 580 | /* |
| 581 | * I/O space cannot be accessed via normal processor loads and |
| 582 | * stores on this platform. |
| 583 | */ |
| 584 | if (mmap_state == pci_mmap_io) |
| 585 | /* |
| 586 | * XXX we could relax this for I/O spaces for which ACPI |
| 587 | * indicates that the space is 1-to-1 mapped. But at the |
| 588 | * moment, we don't support multiple PCI address spaces and |
| 589 | * the legacy I/O space is not 1-to-1 mapped, so this is moot. |
| 590 | */ |
| 591 | return -EINVAL; |
| 592 | |
| 593 | /* |
| 594 | * Leave vm_pgoff as-is, the PCI space address is the physical |
| 595 | * address on this platform. |
| 596 | */ |
| 597 | vma->vm_flags |= (VM_SHM | VM_RESERVED | VM_IO); |
| 598 | |
| 599 | if (write_combine && efi_range_is_wc(vma->vm_start, |
| 600 | vma->vm_end - vma->vm_start)) |
| 601 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); |
| 602 | else |
| 603 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 604 | |
| 605 | if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, |
| 606 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| 607 | return -EAGAIN; |
| 608 | |
| 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | /** |
| 613 | * ia64_pci_get_legacy_mem - generic legacy mem routine |
| 614 | * @bus: bus to get legacy memory base address for |
| 615 | * |
| 616 | * Find the base of legacy memory for @bus. This is typically the first |
| 617 | * megabyte of bus address space for @bus or is simply 0 on platforms whose |
| 618 | * chipsets support legacy I/O and memory routing. Returns the base address |
| 619 | * or an error pointer if an error occurred. |
| 620 | * |
| 621 | * This is the ia64 generic version of this routine. Other platforms |
| 622 | * are free to override it with a machine vector. |
| 623 | */ |
| 624 | char *ia64_pci_get_legacy_mem(struct pci_bus *bus) |
| 625 | { |
| 626 | return (char *)__IA64_UNCACHED_OFFSET; |
| 627 | } |
| 628 | |
| 629 | /** |
| 630 | * pci_mmap_legacy_page_range - map legacy memory space to userland |
| 631 | * @bus: bus whose legacy space we're mapping |
| 632 | * @vma: vma passed in by mmap |
| 633 | * |
| 634 | * Map legacy memory space for this device back to userspace using a machine |
| 635 | * vector to get the base address. |
| 636 | */ |
| 637 | int |
| 638 | pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma) |
| 639 | { |
| 640 | char *addr; |
| 641 | |
| 642 | addr = pci_get_legacy_mem(bus); |
| 643 | if (IS_ERR(addr)) |
| 644 | return PTR_ERR(addr); |
| 645 | |
| 646 | vma->vm_pgoff += (unsigned long)addr >> PAGE_SHIFT; |
| 647 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 648 | vma->vm_flags |= (VM_SHM | VM_RESERVED | VM_IO); |
| 649 | |
| 650 | if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, |
| 651 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| 652 | return -EAGAIN; |
| 653 | |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | /** |
| 658 | * ia64_pci_legacy_read - read from legacy I/O space |
| 659 | * @bus: bus to read |
| 660 | * @port: legacy port value |
| 661 | * @val: caller allocated storage for returned value |
| 662 | * @size: number of bytes to read |
| 663 | * |
| 664 | * Simply reads @size bytes from @port and puts the result in @val. |
| 665 | * |
| 666 | * Again, this (and the write routine) are generic versions that can be |
| 667 | * overridden by the platform. This is necessary on platforms that don't |
| 668 | * support legacy I/O routing or that hard fail on legacy I/O timeouts. |
| 669 | */ |
| 670 | int ia64_pci_legacy_read(struct pci_bus *bus, u16 port, u32 *val, u8 size) |
| 671 | { |
| 672 | int ret = size; |
| 673 | |
| 674 | switch (size) { |
| 675 | case 1: |
| 676 | *val = inb(port); |
| 677 | break; |
| 678 | case 2: |
| 679 | *val = inw(port); |
| 680 | break; |
| 681 | case 4: |
| 682 | *val = inl(port); |
| 683 | break; |
| 684 | default: |
| 685 | ret = -EINVAL; |
| 686 | break; |
| 687 | } |
| 688 | |
| 689 | return ret; |
| 690 | } |
| 691 | |
| 692 | /** |
| 693 | * ia64_pci_legacy_write - perform a legacy I/O write |
| 694 | * @bus: bus pointer |
| 695 | * @port: port to write |
| 696 | * @val: value to write |
| 697 | * @size: number of bytes to write from @val |
| 698 | * |
| 699 | * Simply writes @size bytes of @val to @port. |
| 700 | */ |
| 701 | int ia64_pci_legacy_write(struct pci_dev *bus, u16 port, u32 val, u8 size) |
| 702 | { |
Alex Williamson | 408045a | 2005-12-21 15:21:36 -0700 | [diff] [blame^] | 703 | int ret = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
| 705 | switch (size) { |
| 706 | case 1: |
| 707 | outb(val, port); |
| 708 | break; |
| 709 | case 2: |
| 710 | outw(val, port); |
| 711 | break; |
| 712 | case 4: |
| 713 | outl(val, port); |
| 714 | break; |
| 715 | default: |
| 716 | ret = -EINVAL; |
| 717 | break; |
| 718 | } |
| 719 | |
| 720 | return ret; |
| 721 | } |
| 722 | |
| 723 | /** |
| 724 | * pci_cacheline_size - determine cacheline size for PCI devices |
| 725 | * @dev: void |
| 726 | * |
| 727 | * We want to use the line-size of the outer-most cache. We assume |
| 728 | * that this line-size is the same for all CPUs. |
| 729 | * |
| 730 | * Code mostly taken from arch/ia64/kernel/palinfo.c:cache_info(). |
| 731 | * |
| 732 | * RETURNS: An appropriate -ERRNO error value on eror, or zero for success. |
| 733 | */ |
| 734 | static unsigned long |
| 735 | pci_cacheline_size (void) |
| 736 | { |
| 737 | u64 levels, unique_caches; |
| 738 | s64 status; |
| 739 | pal_cache_config_info_t cci; |
| 740 | static u8 cacheline_size; |
| 741 | |
| 742 | if (cacheline_size) |
| 743 | return cacheline_size; |
| 744 | |
| 745 | status = ia64_pal_cache_summary(&levels, &unique_caches); |
| 746 | if (status != 0) { |
| 747 | printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n", |
| 748 | __FUNCTION__, status); |
| 749 | return SMP_CACHE_BYTES; |
| 750 | } |
| 751 | |
| 752 | status = ia64_pal_cache_config_info(levels - 1, /* cache_type (data_or_unified)= */ 2, |
| 753 | &cci); |
| 754 | if (status != 0) { |
| 755 | printk(KERN_ERR "%s: ia64_pal_cache_config_info() failed (status=%ld)\n", |
| 756 | __FUNCTION__, status); |
| 757 | return SMP_CACHE_BYTES; |
| 758 | } |
| 759 | cacheline_size = 1 << cci.pcci_line_size; |
| 760 | return cacheline_size; |
| 761 | } |
| 762 | |
| 763 | /** |
| 764 | * pcibios_prep_mwi - helper function for drivers/pci/pci.c:pci_set_mwi() |
| 765 | * @dev: the PCI device for which MWI is enabled |
| 766 | * |
| 767 | * For ia64, we can get the cacheline sizes from PAL. |
| 768 | * |
| 769 | * RETURNS: An appropriate -ERRNO error value on eror, or zero for success. |
| 770 | */ |
| 771 | int |
| 772 | pcibios_prep_mwi (struct pci_dev *dev) |
| 773 | { |
| 774 | unsigned long desired_linesize, current_linesize; |
| 775 | int rc = 0; |
| 776 | u8 pci_linesize; |
| 777 | |
| 778 | desired_linesize = pci_cacheline_size(); |
| 779 | |
| 780 | pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &pci_linesize); |
| 781 | current_linesize = 4 * pci_linesize; |
| 782 | if (desired_linesize != current_linesize) { |
| 783 | printk(KERN_WARNING "PCI: slot %s has incorrect PCI cache line size of %lu bytes,", |
| 784 | pci_name(dev), current_linesize); |
| 785 | if (current_linesize > desired_linesize) { |
| 786 | printk(" expected %lu bytes instead\n", desired_linesize); |
| 787 | rc = -EINVAL; |
| 788 | } else { |
| 789 | printk(" correcting to %lu\n", desired_linesize); |
| 790 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, desired_linesize / 4); |
| 791 | } |
| 792 | } |
| 793 | return rc; |
| 794 | } |
| 795 | |
| 796 | int pci_vector_resources(int last, int nr_released) |
| 797 | { |
| 798 | int count = nr_released; |
| 799 | |
Bjorn Helgaas | 4f41d5a | 2005-11-07 15:13:59 -0700 | [diff] [blame] | 800 | count += (IA64_LAST_DEVICE_VECTOR - last); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
| 802 | return count; |
| 803 | } |