Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 1 | /* |
| 2 | * drivers/acpi/resource.c - ACPI device resources interpretation. |
| 3 | * |
| 4 | * Copyright (C) 2012, Intel Corp. |
| 5 | * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
| 6 | * |
| 7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as published |
| 11 | * by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 21 | * |
| 22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | */ |
| 24 | |
| 25 | #include <linux/acpi.h> |
| 26 | #include <linux/device.h> |
| 27 | #include <linux/export.h> |
| 28 | #include <linux/ioport.h> |
Rafael J. Wysocki | 8e345c9 | 2012-11-15 00:30:21 +0100 | [diff] [blame] | 29 | #include <linux/slab.h> |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 30 | |
| 31 | #ifdef CONFIG_X86 |
| 32 | #define valid_IRQ(i) (((i) != 0) && ((i) != 2)) |
| 33 | #else |
| 34 | #define valid_IRQ(i) (true) |
| 35 | #endif |
| 36 | |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 37 | static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io) |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 38 | { |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 39 | u64 reslen = end - start + 1; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 40 | |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 41 | /* |
| 42 | * CHECKME: len might be required to check versus a minimum |
| 43 | * length as well. 1 for io is fine, but for memory it does |
| 44 | * not make any sense at all. |
| 45 | */ |
| 46 | if (len && reslen && reslen == len && start <= end) |
| 47 | return true; |
| 48 | |
| 49 | pr_info("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n", |
| 50 | io ? "io" : "mem", start, end, len); |
| 51 | |
| 52 | return false; |
| 53 | } |
| 54 | |
| 55 | static void acpi_dev_memresource_flags(struct resource *res, u64 len, |
| 56 | u8 write_protect, bool window) |
| 57 | { |
| 58 | res->flags = IORESOURCE_MEM; |
| 59 | |
| 60 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, false)) |
| 61 | res->flags |= IORESOURCE_DISABLED; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 62 | |
| 63 | if (write_protect == ACPI_READ_WRITE_MEMORY) |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 64 | res->flags |= IORESOURCE_MEM_WRITEABLE; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 65 | |
| 66 | if (window) |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 67 | res->flags |= IORESOURCE_WINDOW; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len, |
| 71 | u8 write_protect) |
| 72 | { |
| 73 | res->start = start; |
| 74 | res->end = start + len - 1; |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 75 | acpi_dev_memresource_flags(res, len, write_protect, false); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | /** |
| 79 | * acpi_dev_resource_memory - Extract ACPI memory resource information. |
| 80 | * @ares: Input ACPI resource object. |
| 81 | * @res: Output generic resource object. |
| 82 | * |
| 83 | * Check if the given ACPI resource object represents a memory resource and |
| 84 | * if that's the case, use the information in it to populate the generic |
| 85 | * resource object pointed to by @res. |
| 86 | */ |
| 87 | bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res) |
| 88 | { |
| 89 | struct acpi_resource_memory24 *memory24; |
| 90 | struct acpi_resource_memory32 *memory32; |
| 91 | struct acpi_resource_fixed_memory32 *fixed_memory32; |
| 92 | |
| 93 | switch (ares->type) { |
| 94 | case ACPI_RESOURCE_TYPE_MEMORY24: |
| 95 | memory24 = &ares->data.memory24; |
| 96 | acpi_dev_get_memresource(res, memory24->minimum, |
| 97 | memory24->address_length, |
| 98 | memory24->write_protect); |
| 99 | break; |
| 100 | case ACPI_RESOURCE_TYPE_MEMORY32: |
| 101 | memory32 = &ares->data.memory32; |
| 102 | acpi_dev_get_memresource(res, memory32->minimum, |
| 103 | memory32->address_length, |
| 104 | memory32->write_protect); |
| 105 | break; |
| 106 | case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: |
| 107 | fixed_memory32 = &ares->data.fixed_memory32; |
| 108 | acpi_dev_get_memresource(res, fixed_memory32->address, |
| 109 | fixed_memory32->address_length, |
| 110 | fixed_memory32->write_protect); |
| 111 | break; |
| 112 | default: |
| 113 | return false; |
| 114 | } |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 115 | |
| 116 | return !(res->flags & IORESOURCE_DISABLED); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 117 | } |
| 118 | EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); |
| 119 | |
Thomas Gleixner | 1d0420f | 2015-02-02 10:42:49 +0800 | [diff] [blame^] | 120 | static void acpi_dev_ioresource_flags(struct resource *res, u64 len, |
| 121 | u8 io_decode, bool window) |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 122 | { |
Thomas Gleixner | 1d0420f | 2015-02-02 10:42:49 +0800 | [diff] [blame^] | 123 | res->flags = IORESOURCE_IO; |
| 124 | |
| 125 | if (!acpi_dev_resource_len_valid(res->start, res->end, len, true)) |
| 126 | res->flags |= IORESOURCE_DISABLED; |
| 127 | |
| 128 | if (res->end >= 0x10003) |
| 129 | res->flags |= IORESOURCE_DISABLED; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 130 | |
| 131 | if (io_decode == ACPI_DECODE_16) |
Thomas Gleixner | 1d0420f | 2015-02-02 10:42:49 +0800 | [diff] [blame^] | 132 | res->flags |= IORESOURCE_IO_16BIT_ADDR; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 133 | |
| 134 | if (window) |
Thomas Gleixner | 1d0420f | 2015-02-02 10:42:49 +0800 | [diff] [blame^] | 135 | res->flags |= IORESOURCE_WINDOW; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, |
| 139 | u8 io_decode) |
| 140 | { |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 141 | res->start = start; |
Thomas Gleixner | 1d0420f | 2015-02-02 10:42:49 +0800 | [diff] [blame^] | 142 | res->end = start + len - 1; |
| 143 | acpi_dev_ioresource_flags(res, len, io_decode, false); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | /** |
| 147 | * acpi_dev_resource_io - Extract ACPI I/O resource information. |
| 148 | * @ares: Input ACPI resource object. |
| 149 | * @res: Output generic resource object. |
| 150 | * |
| 151 | * Check if the given ACPI resource object represents an I/O resource and |
| 152 | * if that's the case, use the information in it to populate the generic |
| 153 | * resource object pointed to by @res. |
| 154 | */ |
| 155 | bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res) |
| 156 | { |
| 157 | struct acpi_resource_io *io; |
| 158 | struct acpi_resource_fixed_io *fixed_io; |
| 159 | |
| 160 | switch (ares->type) { |
| 161 | case ACPI_RESOURCE_TYPE_IO: |
| 162 | io = &ares->data.io; |
| 163 | acpi_dev_get_ioresource(res, io->minimum, |
| 164 | io->address_length, |
| 165 | io->io_decode); |
| 166 | break; |
| 167 | case ACPI_RESOURCE_TYPE_FIXED_IO: |
| 168 | fixed_io = &ares->data.fixed_io; |
| 169 | acpi_dev_get_ioresource(res, fixed_io->address, |
| 170 | fixed_io->address_length, |
| 171 | ACPI_DECODE_10); |
| 172 | break; |
| 173 | default: |
| 174 | return false; |
| 175 | } |
Thomas Gleixner | 1d0420f | 2015-02-02 10:42:49 +0800 | [diff] [blame^] | 176 | |
| 177 | return !(res->flags & IORESOURCE_DISABLED); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 178 | } |
| 179 | EXPORT_SYMBOL_GPL(acpi_dev_resource_io); |
| 180 | |
| 181 | /** |
| 182 | * acpi_dev_resource_address_space - Extract ACPI address space information. |
| 183 | * @ares: Input ACPI resource object. |
| 184 | * @res: Output generic resource object. |
| 185 | * |
| 186 | * Check if the given ACPI resource object represents an address space resource |
| 187 | * and if that's the case, use the information in it to populate the generic |
| 188 | * resource object pointed to by @res. |
| 189 | */ |
| 190 | bool acpi_dev_resource_address_space(struct acpi_resource *ares, |
| 191 | struct resource *res) |
| 192 | { |
| 193 | acpi_status status; |
| 194 | struct acpi_resource_address64 addr; |
| 195 | bool window; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 196 | u8 io_decode; |
| 197 | |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 198 | status = acpi_resource_to_address64(ares, &addr); |
| 199 | if (ACPI_FAILURE(status)) |
Jiang Liu | 6658c73 | 2014-10-27 13:21:35 +0800 | [diff] [blame] | 200 | return false; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 201 | |
Lv Zheng | a45de93 | 2015-01-26 16:58:56 +0800 | [diff] [blame] | 202 | res->start = addr.address.minimum; |
| 203 | res->end = addr.address.maximum; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 204 | window = addr.producer_consumer == ACPI_PRODUCER; |
| 205 | |
| 206 | switch(addr.resource_type) { |
| 207 | case ACPI_MEMORY_RANGE: |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 208 | acpi_dev_memresource_flags(res, addr.address.address_length, |
| 209 | addr.info.mem.write_protect, |
| 210 | window); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 211 | break; |
| 212 | case ACPI_IO_RANGE: |
Lv Zheng | a45de93 | 2015-01-26 16:58:56 +0800 | [diff] [blame] | 213 | io_decode = addr.address.granularity == 0xfff ? |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 214 | ACPI_DECODE_10 : ACPI_DECODE_16; |
Thomas Gleixner | 1d0420f | 2015-02-02 10:42:49 +0800 | [diff] [blame^] | 215 | acpi_dev_ioresource_flags(res, addr.address.address_length, |
| 216 | io_decode, window); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 217 | break; |
| 218 | case ACPI_BUS_NUMBER_RANGE: |
| 219 | res->flags = IORESOURCE_BUS; |
| 220 | break; |
| 221 | default: |
| 222 | res->flags = 0; |
| 223 | } |
| 224 | |
| 225 | return true; |
| 226 | } |
| 227 | EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space); |
| 228 | |
| 229 | /** |
| 230 | * acpi_dev_resource_ext_address_space - Extract ACPI address space information. |
| 231 | * @ares: Input ACPI resource object. |
| 232 | * @res: Output generic resource object. |
| 233 | * |
| 234 | * Check if the given ACPI resource object represents an extended address space |
| 235 | * resource and if that's the case, use the information in it to populate the |
| 236 | * generic resource object pointed to by @res. |
| 237 | */ |
| 238 | bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, |
| 239 | struct resource *res) |
| 240 | { |
| 241 | struct acpi_resource_extended_address64 *ext_addr; |
| 242 | bool window; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 243 | u8 io_decode; |
| 244 | |
| 245 | if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) |
| 246 | return false; |
| 247 | |
| 248 | ext_addr = &ares->data.ext_address64; |
| 249 | |
Lv Zheng | a45de93 | 2015-01-26 16:58:56 +0800 | [diff] [blame] | 250 | res->start = ext_addr->address.minimum; |
| 251 | res->end = ext_addr->address.maximum; |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 252 | window = ext_addr->producer_consumer == ACPI_PRODUCER; |
| 253 | |
| 254 | switch(ext_addr->resource_type) { |
| 255 | case ACPI_MEMORY_RANGE: |
Thomas Gleixner | c420dbd | 2015-02-02 10:42:48 +0800 | [diff] [blame] | 256 | acpi_dev_memresource_flags(res, |
| 257 | ext_addr->address.address_length, |
| 258 | ext_addr->info.mem.write_protect, |
| 259 | window); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 260 | break; |
| 261 | case ACPI_IO_RANGE: |
Lv Zheng | a45de93 | 2015-01-26 16:58:56 +0800 | [diff] [blame] | 262 | io_decode = ext_addr->address.granularity == 0xfff ? |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 263 | ACPI_DECODE_10 : ACPI_DECODE_16; |
Thomas Gleixner | 1d0420f | 2015-02-02 10:42:49 +0800 | [diff] [blame^] | 264 | acpi_dev_ioresource_flags(res, ext_addr->address.address_length, |
| 265 | io_decode, window); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 266 | break; |
| 267 | case ACPI_BUS_NUMBER_RANGE: |
| 268 | res->flags = IORESOURCE_BUS; |
| 269 | break; |
| 270 | default: |
| 271 | res->flags = 0; |
| 272 | } |
| 273 | |
| 274 | return true; |
| 275 | } |
| 276 | EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space); |
| 277 | |
| 278 | /** |
| 279 | * acpi_dev_irq_flags - Determine IRQ resource flags. |
| 280 | * @triggering: Triggering type as provided by ACPI. |
| 281 | * @polarity: Interrupt polarity as provided by ACPI. |
| 282 | * @shareable: Whether or not the interrupt is shareable. |
| 283 | */ |
| 284 | unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable) |
| 285 | { |
| 286 | unsigned long flags; |
| 287 | |
| 288 | if (triggering == ACPI_LEVEL_SENSITIVE) |
| 289 | flags = polarity == ACPI_ACTIVE_LOW ? |
| 290 | IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL; |
| 291 | else |
| 292 | flags = polarity == ACPI_ACTIVE_LOW ? |
| 293 | IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE; |
| 294 | |
| 295 | if (shareable == ACPI_SHARED) |
| 296 | flags |= IORESOURCE_IRQ_SHAREABLE; |
| 297 | |
| 298 | return flags | IORESOURCE_IRQ; |
| 299 | } |
| 300 | EXPORT_SYMBOL_GPL(acpi_dev_irq_flags); |
| 301 | |
| 302 | static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi) |
| 303 | { |
| 304 | res->start = gsi; |
| 305 | res->end = gsi; |
| 306 | res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED; |
| 307 | } |
| 308 | |
| 309 | static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, |
Mika Westerberg | 204ebc0 | 2013-05-20 15:41:45 +0000 | [diff] [blame] | 310 | u8 triggering, u8 polarity, u8 shareable, |
| 311 | bool legacy) |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 312 | { |
| 313 | int irq, p, t; |
| 314 | |
| 315 | if (!valid_IRQ(gsi)) { |
| 316 | acpi_dev_irqresource_disabled(res, gsi); |
| 317 | return; |
| 318 | } |
| 319 | |
| 320 | /* |
| 321 | * In IO-APIC mode, use overrided attribute. Two reasons: |
| 322 | * 1. BIOS bug in DSDT |
| 323 | * 2. BIOS uses IO-APIC mode Interrupt Source Override |
Mika Westerberg | 204ebc0 | 2013-05-20 15:41:45 +0000 | [diff] [blame] | 324 | * |
| 325 | * We do this only if we are dealing with IRQ() or IRQNoFlags() |
| 326 | * resource (the legacy ISA resources). With modern ACPI 5 devices |
| 327 | * using extended IRQ descriptors we take the IRQ configuration |
| 328 | * from _CRS directly. |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 329 | */ |
Mika Westerberg | 204ebc0 | 2013-05-20 15:41:45 +0000 | [diff] [blame] | 330 | if (legacy && !acpi_get_override_irq(gsi, &t, &p)) { |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 331 | u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; |
| 332 | u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; |
| 333 | |
| 334 | if (triggering != trig || polarity != pol) { |
| 335 | pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi, |
Mika Westerberg | 204ebc0 | 2013-05-20 15:41:45 +0000 | [diff] [blame] | 336 | t ? "level" : "edge", p ? "low" : "high"); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 337 | triggering = trig; |
| 338 | polarity = pol; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); |
| 343 | irq = acpi_register_gsi(NULL, gsi, triggering, polarity); |
| 344 | if (irq >= 0) { |
| 345 | res->start = irq; |
| 346 | res->end = irq; |
| 347 | } else { |
| 348 | acpi_dev_irqresource_disabled(res, gsi); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | /** |
| 353 | * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. |
| 354 | * @ares: Input ACPI resource object. |
| 355 | * @index: Index into the array of GSIs represented by the resource. |
| 356 | * @res: Output generic resource object. |
| 357 | * |
| 358 | * Check if the given ACPI resource object represents an interrupt resource |
| 359 | * and @index does not exceed the resource's interrupt count (true is returned |
| 360 | * in that case regardless of the results of the other checks)). If that's the |
| 361 | * case, register the GSI corresponding to @index from the array of interrupts |
| 362 | * represented by the resource and populate the generic resource object pointed |
| 363 | * to by @res accordingly. If the registration of the GSI is not successful, |
| 364 | * IORESOURCE_DISABLED will be set it that object's flags. |
| 365 | */ |
| 366 | bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, |
| 367 | struct resource *res) |
| 368 | { |
| 369 | struct acpi_resource_irq *irq; |
| 370 | struct acpi_resource_extended_irq *ext_irq; |
| 371 | |
| 372 | switch (ares->type) { |
| 373 | case ACPI_RESOURCE_TYPE_IRQ: |
| 374 | /* |
| 375 | * Per spec, only one interrupt per descriptor is allowed in |
| 376 | * _CRS, but some firmware violates this, so parse them all. |
| 377 | */ |
| 378 | irq = &ares->data.irq; |
| 379 | if (index >= irq->interrupt_count) { |
| 380 | acpi_dev_irqresource_disabled(res, 0); |
| 381 | return false; |
| 382 | } |
| 383 | acpi_dev_get_irqresource(res, irq->interrupts[index], |
| 384 | irq->triggering, irq->polarity, |
Mika Westerberg | 204ebc0 | 2013-05-20 15:41:45 +0000 | [diff] [blame] | 385 | irq->sharable, true); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 386 | break; |
| 387 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: |
| 388 | ext_irq = &ares->data.extended_irq; |
| 389 | if (index >= ext_irq->interrupt_count) { |
| 390 | acpi_dev_irqresource_disabled(res, 0); |
| 391 | return false; |
| 392 | } |
| 393 | acpi_dev_get_irqresource(res, ext_irq->interrupts[index], |
| 394 | ext_irq->triggering, ext_irq->polarity, |
Mika Westerberg | 204ebc0 | 2013-05-20 15:41:45 +0000 | [diff] [blame] | 395 | ext_irq->sharable, false); |
Rafael J. Wysocki | 046d9ce | 2012-11-15 00:30:01 +0100 | [diff] [blame] | 396 | break; |
| 397 | default: |
| 398 | return false; |
| 399 | } |
| 400 | |
| 401 | return true; |
| 402 | } |
| 403 | EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); |
Rafael J. Wysocki | 8e345c9 | 2012-11-15 00:30:21 +0100 | [diff] [blame] | 404 | |
| 405 | /** |
| 406 | * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). |
| 407 | * @list: The head of the resource list to free. |
| 408 | */ |
| 409 | void acpi_dev_free_resource_list(struct list_head *list) |
| 410 | { |
| 411 | struct resource_list_entry *rentry, *re; |
| 412 | |
| 413 | list_for_each_entry_safe(rentry, re, list, node) { |
| 414 | list_del(&rentry->node); |
| 415 | kfree(rentry); |
| 416 | } |
| 417 | } |
| 418 | EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); |
| 419 | |
| 420 | struct res_proc_context { |
| 421 | struct list_head *list; |
| 422 | int (*preproc)(struct acpi_resource *, void *); |
| 423 | void *preproc_data; |
| 424 | int count; |
| 425 | int error; |
| 426 | }; |
| 427 | |
| 428 | static acpi_status acpi_dev_new_resource_entry(struct resource *r, |
| 429 | struct res_proc_context *c) |
| 430 | { |
| 431 | struct resource_list_entry *rentry; |
| 432 | |
| 433 | rentry = kmalloc(sizeof(*rentry), GFP_KERNEL); |
| 434 | if (!rentry) { |
| 435 | c->error = -ENOMEM; |
| 436 | return AE_NO_MEMORY; |
| 437 | } |
Rafael J. Wysocki | 8e345c9 | 2012-11-15 00:30:21 +0100 | [diff] [blame] | 438 | rentry->res = *r; |
| 439 | list_add_tail(&rentry->node, c->list); |
| 440 | c->count++; |
| 441 | return AE_OK; |
| 442 | } |
| 443 | |
| 444 | static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, |
| 445 | void *context) |
| 446 | { |
| 447 | struct res_proc_context *c = context; |
| 448 | struct resource r; |
| 449 | int i; |
| 450 | |
| 451 | if (c->preproc) { |
| 452 | int ret; |
| 453 | |
| 454 | ret = c->preproc(ares, c->preproc_data); |
| 455 | if (ret < 0) { |
| 456 | c->error = ret; |
Rafael J. Wysocki | 8a66790 | 2012-11-16 21:55:48 +0100 | [diff] [blame] | 457 | return AE_CTRL_TERMINATE; |
Rafael J. Wysocki | 8e345c9 | 2012-11-15 00:30:21 +0100 | [diff] [blame] | 458 | } else if (ret > 0) { |
| 459 | return AE_OK; |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | memset(&r, 0, sizeof(r)); |
| 464 | |
| 465 | if (acpi_dev_resource_memory(ares, &r) |
| 466 | || acpi_dev_resource_io(ares, &r) |
| 467 | || acpi_dev_resource_address_space(ares, &r) |
| 468 | || acpi_dev_resource_ext_address_space(ares, &r)) |
| 469 | return acpi_dev_new_resource_entry(&r, c); |
| 470 | |
| 471 | for (i = 0; acpi_dev_resource_interrupt(ares, i, &r); i++) { |
| 472 | acpi_status status; |
| 473 | |
| 474 | status = acpi_dev_new_resource_entry(&r, c); |
| 475 | if (ACPI_FAILURE(status)) |
| 476 | return status; |
| 477 | } |
| 478 | |
| 479 | return AE_OK; |
| 480 | } |
| 481 | |
| 482 | /** |
| 483 | * acpi_dev_get_resources - Get current resources of a device. |
| 484 | * @adev: ACPI device node to get the resources for. |
| 485 | * @list: Head of the resultant list of resources (must be empty). |
| 486 | * @preproc: The caller's preprocessing routine. |
| 487 | * @preproc_data: Pointer passed to the caller's preprocessing routine. |
| 488 | * |
| 489 | * Evaluate the _CRS method for the given device node and process its output by |
| 490 | * (1) executing the @preproc() rountine provided by the caller, passing the |
| 491 | * resource pointer and @preproc_data to it as arguments, for each ACPI resource |
| 492 | * returned and (2) converting all of the returned ACPI resources into struct |
| 493 | * resource objects if possible. If the return value of @preproc() in step (1) |
| 494 | * is different from 0, step (2) is not applied to the given ACPI resource and |
| 495 | * if that value is negative, the whole processing is aborted and that value is |
| 496 | * returned as the final error code. |
| 497 | * |
| 498 | * The resultant struct resource objects are put on the list pointed to by |
| 499 | * @list, that must be empty initially, as members of struct resource_list_entry |
| 500 | * objects. Callers of this routine should use %acpi_dev_free_resource_list() to |
| 501 | * free that list. |
| 502 | * |
| 503 | * The number of resources in the output list is returned on success, an error |
| 504 | * code reflecting the error condition is returned otherwise. |
| 505 | */ |
| 506 | int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, |
| 507 | int (*preproc)(struct acpi_resource *, void *), |
| 508 | void *preproc_data) |
| 509 | { |
| 510 | struct res_proc_context c; |
Rafael J. Wysocki | 8e345c9 | 2012-11-15 00:30:21 +0100 | [diff] [blame] | 511 | acpi_status status; |
| 512 | |
| 513 | if (!adev || !adev->handle || !list_empty(list)) |
| 514 | return -EINVAL; |
| 515 | |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 516 | if (!acpi_has_method(adev->handle, METHOD_NAME__CRS)) |
Rafael J. Wysocki | 8e345c9 | 2012-11-15 00:30:21 +0100 | [diff] [blame] | 517 | return 0; |
| 518 | |
| 519 | c.list = list; |
| 520 | c.preproc = preproc; |
| 521 | c.preproc_data = preproc_data; |
| 522 | c.count = 0; |
| 523 | c.error = 0; |
| 524 | status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS, |
| 525 | acpi_dev_process_resource, &c); |
| 526 | if (ACPI_FAILURE(status)) { |
| 527 | acpi_dev_free_resource_list(list); |
| 528 | return c.error ? c.error : -EIO; |
| 529 | } |
| 530 | |
| 531 | return c.count; |
| 532 | } |
| 533 | EXPORT_SYMBOL_GPL(acpi_dev_get_resources); |