Bjorn Helgaas | 7328c8f | 2018-01-26 11:45:16 -0600 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Bjorn Helgaas | df62ab5 | 2018-03-09 16:36:33 -0600 | [diff] [blame] | 3 | * PCI support in ACPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 5 | * Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com> |
| 6 | * Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com> |
| 7 | * Copyright (C) 2004 Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/delay.h> |
| 11 | #include <linux/init.h> |
Suravee Suthikulpanit | 471036b | 2015-12-10 08:55:27 -0800 | [diff] [blame] | 12 | #include <linux/irqdomain.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/pci.h> |
Suravee Suthikulpanit | 471036b | 2015-12-10 08:55:27 -0800 | [diff] [blame] | 14 | #include <linux/msi.h> |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 15 | #include <linux/pci_hotplug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
Shaohua Li | 5fde244 | 2008-07-23 10:32:24 +0800 | [diff] [blame] | 17 | #include <linux/pci-aspm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/pci-acpi.h> |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 19 | #include <linux/pm_runtime.h> |
Rafael J. Wysocki | 8b713a8 | 2012-10-24 02:08:38 +0200 | [diff] [blame] | 20 | #include <linux/pm_qos.h> |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 21 | #include "pci.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Aaron Lu | 18e94a3 | 2015-03-25 14:31:41 +0800 | [diff] [blame] | 23 | /* |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 24 | * The GUID is defined in the PCI Firmware Specification available here: |
Aaron Lu | 18e94a3 | 2015-03-25 14:31:41 +0800 | [diff] [blame] | 25 | * https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf |
| 26 | */ |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 27 | const guid_t pci_acpi_dsm_guid = |
| 28 | GUID_INIT(0xe5c937d0, 0x3553, 0x4d7a, |
| 29 | 0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d); |
Aaron Lu | 18e94a3 | 2015-03-25 14:31:41 +0800 | [diff] [blame] | 30 | |
Dongdong Liu | 169de96 | 2016-12-01 00:33:42 -0600 | [diff] [blame] | 31 | #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64) |
| 32 | static int acpi_get_rc_addr(struct acpi_device *adev, struct resource *res) |
| 33 | { |
| 34 | struct device *dev = &adev->dev; |
| 35 | struct resource_entry *entry; |
| 36 | struct list_head list; |
| 37 | unsigned long flags; |
| 38 | int ret; |
| 39 | |
| 40 | INIT_LIST_HEAD(&list); |
| 41 | flags = IORESOURCE_MEM; |
| 42 | ret = acpi_dev_get_resources(adev, &list, |
| 43 | acpi_dev_filter_resource_type_cb, |
| 44 | (void *) flags); |
| 45 | if (ret < 0) { |
| 46 | dev_err(dev, "failed to parse _CRS method, error code %d\n", |
| 47 | ret); |
| 48 | return ret; |
| 49 | } |
| 50 | |
| 51 | if (ret == 0) { |
| 52 | dev_err(dev, "no IO and memory resources present in _CRS\n"); |
| 53 | return -EINVAL; |
| 54 | } |
| 55 | |
| 56 | entry = list_first_entry(&list, struct resource_entry, node); |
| 57 | *res = *entry->res; |
| 58 | acpi_dev_free_resource_list(&list); |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static acpi_status acpi_match_rc(acpi_handle handle, u32 lvl, void *context, |
| 63 | void **retval) |
| 64 | { |
| 65 | u16 *segment = context; |
| 66 | unsigned long long uid; |
| 67 | acpi_status status; |
| 68 | |
| 69 | status = acpi_evaluate_integer(handle, "_UID", NULL, &uid); |
| 70 | if (ACPI_FAILURE(status) || uid != *segment) |
| 71 | return AE_CTRL_DEPTH; |
| 72 | |
| 73 | *(acpi_handle *)retval = handle; |
| 74 | return AE_CTRL_TERMINATE; |
| 75 | } |
| 76 | |
| 77 | int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment, |
| 78 | struct resource *res) |
| 79 | { |
| 80 | struct acpi_device *adev; |
| 81 | acpi_status status; |
| 82 | acpi_handle handle; |
| 83 | int ret; |
| 84 | |
| 85 | status = acpi_get_devices(hid, acpi_match_rc, &segment, &handle); |
| 86 | if (ACPI_FAILURE(status)) { |
| 87 | dev_err(dev, "can't find _HID %s device to locate resources\n", |
| 88 | hid); |
| 89 | return -ENODEV; |
| 90 | } |
| 91 | |
| 92 | ret = acpi_bus_get_device(handle, &adev); |
| 93 | if (ret) |
| 94 | return ret; |
| 95 | |
| 96 | ret = acpi_get_rc_addr(adev, res); |
| 97 | if (ret) { |
| 98 | dev_err(dev, "can't get resource from %s\n", |
| 99 | dev_name(&adev->dev)); |
| 100 | return ret; |
| 101 | } |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | #endif |
| 106 | |
Jiang Liu | f4b57a3 | 2012-06-22 14:55:16 +0800 | [diff] [blame] | 107 | phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle) |
| 108 | { |
| 109 | acpi_status status = AE_NOT_EXIST; |
| 110 | unsigned long long mcfg_addr; |
| 111 | |
| 112 | if (handle) |
| 113 | status = acpi_evaluate_integer(handle, METHOD_NAME__CBA, |
| 114 | NULL, &mcfg_addr); |
| 115 | if (ACPI_FAILURE(status)) |
| 116 | return 0; |
| 117 | |
| 118 | return (phys_addr_t)mcfg_addr; |
| 119 | } |
| 120 | |
Bjorn Helgaas | abbfec3 | 2014-09-12 15:29:55 -0600 | [diff] [blame] | 121 | static acpi_status decode_type0_hpx_record(union acpi_object *record, |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 122 | struct hpp_type0 *hpx0) |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 123 | { |
| 124 | int i; |
| 125 | union acpi_object *fields = record->package.elements; |
| 126 | u32 revision = fields[1].integer.value; |
| 127 | |
| 128 | switch (revision) { |
| 129 | case 1: |
| 130 | if (record->package.count != 6) |
| 131 | return AE_ERROR; |
| 132 | for (i = 2; i < 6; i++) |
| 133 | if (fields[i].type != ACPI_TYPE_INTEGER) |
| 134 | return AE_ERROR; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 135 | hpx0->revision = revision; |
| 136 | hpx0->cache_line_size = fields[2].integer.value; |
| 137 | hpx0->latency_timer = fields[3].integer.value; |
| 138 | hpx0->enable_serr = fields[4].integer.value; |
| 139 | hpx0->enable_perr = fields[5].integer.value; |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 140 | break; |
| 141 | default: |
Mohan Kumar | 25da8db | 2019-04-20 07:03:46 +0300 | [diff] [blame] | 142 | pr_warn("%s: Type 0 Revision %d record not supported\n", |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 143 | __func__, revision); |
| 144 | return AE_ERROR; |
| 145 | } |
| 146 | return AE_OK; |
| 147 | } |
| 148 | |
Bjorn Helgaas | abbfec3 | 2014-09-12 15:29:55 -0600 | [diff] [blame] | 149 | static acpi_status decode_type1_hpx_record(union acpi_object *record, |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 150 | struct hpp_type1 *hpx1) |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 151 | { |
| 152 | int i; |
| 153 | union acpi_object *fields = record->package.elements; |
| 154 | u32 revision = fields[1].integer.value; |
| 155 | |
| 156 | switch (revision) { |
| 157 | case 1: |
| 158 | if (record->package.count != 5) |
| 159 | return AE_ERROR; |
| 160 | for (i = 2; i < 5; i++) |
| 161 | if (fields[i].type != ACPI_TYPE_INTEGER) |
| 162 | return AE_ERROR; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 163 | hpx1->revision = revision; |
| 164 | hpx1->max_mem_read = fields[2].integer.value; |
| 165 | hpx1->avg_max_split = fields[3].integer.value; |
| 166 | hpx1->tot_max_split = fields[4].integer.value; |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 167 | break; |
| 168 | default: |
Mohan Kumar | 25da8db | 2019-04-20 07:03:46 +0300 | [diff] [blame] | 169 | pr_warn("%s: Type 1 Revision %d record not supported\n", |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 170 | __func__, revision); |
| 171 | return AE_ERROR; |
| 172 | } |
| 173 | return AE_OK; |
| 174 | } |
| 175 | |
Bjorn Helgaas | abbfec3 | 2014-09-12 15:29:55 -0600 | [diff] [blame] | 176 | static acpi_status decode_type2_hpx_record(union acpi_object *record, |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 177 | struct hpp_type2 *hpx2) |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 178 | { |
| 179 | int i; |
| 180 | union acpi_object *fields = record->package.elements; |
| 181 | u32 revision = fields[1].integer.value; |
| 182 | |
| 183 | switch (revision) { |
| 184 | case 1: |
| 185 | if (record->package.count != 18) |
| 186 | return AE_ERROR; |
| 187 | for (i = 2; i < 18; i++) |
| 188 | if (fields[i].type != ACPI_TYPE_INTEGER) |
| 189 | return AE_ERROR; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 190 | hpx2->revision = revision; |
| 191 | hpx2->unc_err_mask_and = fields[2].integer.value; |
| 192 | hpx2->unc_err_mask_or = fields[3].integer.value; |
| 193 | hpx2->unc_err_sever_and = fields[4].integer.value; |
| 194 | hpx2->unc_err_sever_or = fields[5].integer.value; |
| 195 | hpx2->cor_err_mask_and = fields[6].integer.value; |
| 196 | hpx2->cor_err_mask_or = fields[7].integer.value; |
| 197 | hpx2->adv_err_cap_and = fields[8].integer.value; |
| 198 | hpx2->adv_err_cap_or = fields[9].integer.value; |
| 199 | hpx2->pci_exp_devctl_and = fields[10].integer.value; |
| 200 | hpx2->pci_exp_devctl_or = fields[11].integer.value; |
| 201 | hpx2->pci_exp_lnkctl_and = fields[12].integer.value; |
| 202 | hpx2->pci_exp_lnkctl_or = fields[13].integer.value; |
| 203 | hpx2->sec_unc_err_sever_and = fields[14].integer.value; |
| 204 | hpx2->sec_unc_err_sever_or = fields[15].integer.value; |
| 205 | hpx2->sec_unc_err_mask_and = fields[16].integer.value; |
| 206 | hpx2->sec_unc_err_mask_or = fields[17].integer.value; |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 207 | break; |
| 208 | default: |
Mohan Kumar | 25da8db | 2019-04-20 07:03:46 +0300 | [diff] [blame] | 209 | pr_warn("%s: Type 2 Revision %d record not supported\n", |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 210 | __func__, revision); |
| 211 | return AE_ERROR; |
| 212 | } |
| 213 | return AE_OK; |
| 214 | } |
| 215 | |
Alexandru Gagniuc | f873c51 | 2019-02-08 10:24:13 -0600 | [diff] [blame] | 216 | static void parse_hpx3_register(struct hpx_type3 *hpx3_reg, |
| 217 | union acpi_object *reg_fields) |
| 218 | { |
| 219 | hpx3_reg->device_type = reg_fields[0].integer.value; |
| 220 | hpx3_reg->function_type = reg_fields[1].integer.value; |
| 221 | hpx3_reg->config_space_location = reg_fields[2].integer.value; |
| 222 | hpx3_reg->pci_exp_cap_id = reg_fields[3].integer.value; |
| 223 | hpx3_reg->pci_exp_cap_ver = reg_fields[4].integer.value; |
| 224 | hpx3_reg->pci_exp_vendor_id = reg_fields[5].integer.value; |
| 225 | hpx3_reg->dvsec_id = reg_fields[6].integer.value; |
| 226 | hpx3_reg->dvsec_rev = reg_fields[7].integer.value; |
| 227 | hpx3_reg->match_offset = reg_fields[8].integer.value; |
| 228 | hpx3_reg->match_mask_and = reg_fields[9].integer.value; |
| 229 | hpx3_reg->match_value = reg_fields[10].integer.value; |
| 230 | hpx3_reg->reg_offset = reg_fields[11].integer.value; |
| 231 | hpx3_reg->reg_mask_and = reg_fields[12].integer.value; |
| 232 | hpx3_reg->reg_mask_or = reg_fields[13].integer.value; |
| 233 | } |
| 234 | |
| 235 | static acpi_status program_type3_hpx_record(struct pci_dev *dev, |
| 236 | union acpi_object *record, |
| 237 | const struct hotplug_program_ops *hp_ops) |
| 238 | { |
| 239 | union acpi_object *fields = record->package.elements; |
| 240 | u32 desc_count, expected_length, revision; |
| 241 | union acpi_object *reg_fields; |
| 242 | struct hpx_type3 hpx3; |
| 243 | int i; |
| 244 | |
| 245 | revision = fields[1].integer.value; |
| 246 | switch (revision) { |
| 247 | case 1: |
| 248 | desc_count = fields[2].integer.value; |
| 249 | expected_length = 3 + desc_count * 14; |
| 250 | |
| 251 | if (record->package.count != expected_length) |
| 252 | return AE_ERROR; |
| 253 | |
| 254 | for (i = 2; i < expected_length; i++) |
| 255 | if (fields[i].type != ACPI_TYPE_INTEGER) |
| 256 | return AE_ERROR; |
| 257 | |
| 258 | for (i = 0; i < desc_count; i++) { |
| 259 | reg_fields = fields + 3 + i * 14; |
| 260 | parse_hpx3_register(&hpx3, reg_fields); |
| 261 | hp_ops->program_type3(dev, &hpx3); |
| 262 | } |
| 263 | |
| 264 | break; |
| 265 | default: |
| 266 | printk(KERN_WARNING |
| 267 | "%s: Type 3 Revision %d record not supported\n", |
| 268 | __func__, revision); |
| 269 | return AE_ERROR; |
| 270 | } |
| 271 | return AE_OK; |
| 272 | } |
| 273 | |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 274 | static acpi_status acpi_run_hpx(struct pci_dev *dev, acpi_handle handle, |
| 275 | const struct hotplug_program_ops *hp_ops) |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 276 | { |
| 277 | acpi_status status; |
| 278 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 279 | union acpi_object *package, *record, *fields; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 280 | struct hpp_type0 hpx0; |
| 281 | struct hpp_type1 hpx1; |
| 282 | struct hpp_type2 hpx2; |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 283 | u32 type; |
| 284 | int i; |
| 285 | |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 286 | status = acpi_evaluate_object(handle, "_HPX", NULL, &buffer); |
| 287 | if (ACPI_FAILURE(status)) |
| 288 | return status; |
| 289 | |
| 290 | package = (union acpi_object *)buffer.pointer; |
| 291 | if (package->type != ACPI_TYPE_PACKAGE) { |
| 292 | status = AE_ERROR; |
| 293 | goto exit; |
| 294 | } |
| 295 | |
| 296 | for (i = 0; i < package->package.count; i++) { |
| 297 | record = &package->package.elements[i]; |
| 298 | if (record->type != ACPI_TYPE_PACKAGE) { |
| 299 | status = AE_ERROR; |
| 300 | goto exit; |
| 301 | } |
| 302 | |
| 303 | fields = record->package.elements; |
| 304 | if (fields[0].type != ACPI_TYPE_INTEGER || |
| 305 | fields[1].type != ACPI_TYPE_INTEGER) { |
| 306 | status = AE_ERROR; |
| 307 | goto exit; |
| 308 | } |
| 309 | |
| 310 | type = fields[0].integer.value; |
| 311 | switch (type) { |
| 312 | case 0: |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 313 | memset(&hpx0, 0, sizeof(hpx0)); |
| 314 | status = decode_type0_hpx_record(record, &hpx0); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 315 | if (ACPI_FAILURE(status)) |
| 316 | goto exit; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 317 | hp_ops->program_type0(dev, &hpx0); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 318 | break; |
| 319 | case 1: |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 320 | memset(&hpx1, 0, sizeof(hpx1)); |
| 321 | status = decode_type1_hpx_record(record, &hpx1); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 322 | if (ACPI_FAILURE(status)) |
| 323 | goto exit; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 324 | hp_ops->program_type1(dev, &hpx1); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 325 | break; |
| 326 | case 2: |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 327 | memset(&hpx2, 0, sizeof(hpx2)); |
| 328 | status = decode_type2_hpx_record(record, &hpx2); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 329 | if (ACPI_FAILURE(status)) |
| 330 | goto exit; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 331 | hp_ops->program_type2(dev, &hpx2); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 332 | break; |
Alexandru Gagniuc | f873c51 | 2019-02-08 10:24:13 -0600 | [diff] [blame] | 333 | case 3: |
| 334 | status = program_type3_hpx_record(dev, record, hp_ops); |
| 335 | if (ACPI_FAILURE(status)) |
| 336 | goto exit; |
| 337 | break; |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 338 | default: |
Mohan Kumar | 25da8db | 2019-04-20 07:03:46 +0300 | [diff] [blame] | 339 | pr_err("%s: Type %d record not supported\n", |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 340 | __func__, type); |
| 341 | status = AE_ERROR; |
| 342 | goto exit; |
| 343 | } |
| 344 | } |
| 345 | exit: |
| 346 | kfree(buffer.pointer); |
| 347 | return status; |
| 348 | } |
| 349 | |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 350 | static acpi_status acpi_run_hpp(struct pci_dev *dev, acpi_handle handle, |
| 351 | const struct hotplug_program_ops *hp_ops) |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 352 | { |
| 353 | acpi_status status; |
| 354 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 355 | union acpi_object *package, *fields; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 356 | struct hpp_type0 hpp0; |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 357 | int i; |
| 358 | |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 359 | memset(&hpp0, 0, sizeof(hpp0)); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 360 | |
| 361 | status = acpi_evaluate_object(handle, "_HPP", NULL, &buffer); |
| 362 | if (ACPI_FAILURE(status)) |
| 363 | return status; |
| 364 | |
| 365 | package = (union acpi_object *) buffer.pointer; |
| 366 | if (package->type != ACPI_TYPE_PACKAGE || |
| 367 | package->package.count != 4) { |
| 368 | status = AE_ERROR; |
| 369 | goto exit; |
| 370 | } |
| 371 | |
| 372 | fields = package->package.elements; |
| 373 | for (i = 0; i < 4; i++) { |
| 374 | if (fields[i].type != ACPI_TYPE_INTEGER) { |
| 375 | status = AE_ERROR; |
| 376 | goto exit; |
| 377 | } |
| 378 | } |
| 379 | |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 380 | hpp0.revision = 1; |
| 381 | hpp0.cache_line_size = fields[0].integer.value; |
| 382 | hpp0.latency_timer = fields[1].integer.value; |
| 383 | hpp0.enable_serr = fields[2].integer.value; |
| 384 | hpp0.enable_perr = fields[3].integer.value; |
| 385 | |
| 386 | hp_ops->program_type0(dev, &hpp0); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 387 | |
| 388 | exit: |
| 389 | kfree(buffer.pointer); |
| 390 | return status; |
| 391 | } |
| 392 | |
| 393 | /* pci_get_hp_params |
| 394 | * |
| 395 | * @dev - the pci_dev for which we want parameters |
| 396 | * @hpp - allocated by the caller |
| 397 | */ |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 398 | int pci_acpi_program_hp_params(struct pci_dev *dev, |
| 399 | const struct hotplug_program_ops *hp_ops) |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 400 | { |
| 401 | acpi_status status; |
| 402 | acpi_handle handle, phandle; |
| 403 | struct pci_bus *pbus; |
| 404 | |
Bjorn Helgaas | 8647ca9a | 2015-03-24 11:12:45 -0500 | [diff] [blame] | 405 | if (acpi_pci_disabled) |
| 406 | return -ENODEV; |
| 407 | |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 408 | handle = NULL; |
| 409 | for (pbus = dev->bus; pbus; pbus = pbus->parent) { |
| 410 | handle = acpi_pci_get_bridge_handle(pbus); |
| 411 | if (handle) |
| 412 | break; |
| 413 | } |
| 414 | |
| 415 | /* |
| 416 | * _HPP settings apply to all child buses, until another _HPP is |
| 417 | * encountered. If we don't find an _HPP for the input pci dev, |
| 418 | * look for it in the parent device scope since that would apply to |
| 419 | * this pci dev. |
| 420 | */ |
| 421 | while (handle) { |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 422 | status = acpi_run_hpx(dev, handle, hp_ops); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 423 | if (ACPI_SUCCESS(status)) |
| 424 | return 0; |
Alexandru Gagniuc | 87fcf12 | 2019-04-19 14:27:36 -0500 | [diff] [blame] | 425 | status = acpi_run_hpp(dev, handle, hp_ops); |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 426 | if (ACPI_SUCCESS(status)) |
| 427 | return 0; |
| 428 | if (acpi_is_root_bridge(handle)) |
| 429 | break; |
| 430 | status = acpi_get_parent(handle, &phandle); |
| 431 | if (ACPI_FAILURE(status)) |
| 432 | break; |
| 433 | handle = phandle; |
| 434 | } |
| 435 | return -ENODEV; |
| 436 | } |
Bjorn Helgaas | 9ce90ea | 2014-09-12 15:23:14 -0600 | [diff] [blame] | 437 | |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 438 | /** |
Lukas Wunner | 437eb7b | 2016-10-28 10:52:06 +0200 | [diff] [blame] | 439 | * pciehp_is_native - Check whether a hotplug port is handled by the OS |
Mika Westerberg | 5352a44 | 2018-05-23 17:24:08 -0500 | [diff] [blame] | 440 | * @bridge: Hotplug port to check |
Lukas Wunner | 437eb7b | 2016-10-28 10:52:06 +0200 | [diff] [blame] | 441 | * |
Mika Westerberg | 5352a44 | 2018-05-23 17:24:08 -0500 | [diff] [blame] | 442 | * Returns true if the given @bridge is handled by the native PCIe hotplug |
| 443 | * driver. |
Lukas Wunner | 437eb7b | 2016-10-28 10:52:06 +0200 | [diff] [blame] | 444 | */ |
Mika Westerberg | 5352a44 | 2018-05-23 17:24:08 -0500 | [diff] [blame] | 445 | bool pciehp_is_native(struct pci_dev *bridge) |
Lukas Wunner | 437eb7b | 2016-10-28 10:52:06 +0200 | [diff] [blame] | 446 | { |
Mika Westerberg | 5352a44 | 2018-05-23 17:24:08 -0500 | [diff] [blame] | 447 | const struct pci_host_bridge *host; |
| 448 | u32 slot_cap; |
Lukas Wunner | 437eb7b | 2016-10-28 10:52:06 +0200 | [diff] [blame] | 449 | |
Mika Westerberg | 5352a44 | 2018-05-23 17:24:08 -0500 | [diff] [blame] | 450 | if (!IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE)) |
Lukas Wunner | 437eb7b | 2016-10-28 10:52:06 +0200 | [diff] [blame] | 451 | return false; |
| 452 | |
Mika Westerberg | 5352a44 | 2018-05-23 17:24:08 -0500 | [diff] [blame] | 453 | pcie_capability_read_dword(bridge, PCI_EXP_SLTCAP, &slot_cap); |
| 454 | if (!(slot_cap & PCI_EXP_SLTCAP_HPC)) |
Lukas Wunner | 437eb7b | 2016-10-28 10:52:06 +0200 | [diff] [blame] | 455 | return false; |
| 456 | |
Mika Westerberg | 5352a44 | 2018-05-23 17:24:08 -0500 | [diff] [blame] | 457 | if (pcie_ports_native) |
| 458 | return true; |
| 459 | |
| 460 | host = pci_find_host_bridge(bridge->bus); |
| 461 | return host->native_pcie_hotplug; |
Lukas Wunner | 437eb7b | 2016-10-28 10:52:06 +0200 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | /** |
Mika Westerberg | 90cc0c3 | 2018-05-31 11:42:11 -0500 | [diff] [blame] | 465 | * shpchp_is_native - Check whether a hotplug port is handled by the OS |
| 466 | * @bridge: Hotplug port to check |
| 467 | * |
| 468 | * Returns true if the given @bridge is handled by the native SHPC hotplug |
| 469 | * driver. |
| 470 | */ |
| 471 | bool shpchp_is_native(struct pci_dev *bridge) |
| 472 | { |
Bjorn Helgaas | b03799b | 2018-06-25 16:49:06 -0500 | [diff] [blame] | 473 | return bridge->shpc_managed; |
Mika Westerberg | 90cc0c3 | 2018-05-31 11:42:11 -0500 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | /** |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 477 | * pci_acpi_wake_bus - Root bus wakeup notification fork function. |
Rafael J. Wysocki | 64fd1c70 | 2017-06-12 22:48:41 +0200 | [diff] [blame] | 478 | * @context: Device wakeup context. |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 479 | */ |
Rafael J. Wysocki | 64fd1c70 | 2017-06-12 22:48:41 +0200 | [diff] [blame] | 480 | static void pci_acpi_wake_bus(struct acpi_device_wakeup_context *context) |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 481 | { |
| 482 | struct acpi_device *adev; |
| 483 | struct acpi_pci_root *root; |
| 484 | |
Rafael J. Wysocki | 64fd1c70 | 2017-06-12 22:48:41 +0200 | [diff] [blame] | 485 | adev = container_of(context, struct acpi_device, wakeup.context); |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 486 | root = acpi_driver_data(adev); |
| 487 | pci_pme_wakeup_bus(root->bus); |
| 488 | } |
| 489 | |
| 490 | /** |
| 491 | * pci_acpi_wake_dev - PCI device wakeup notification work function. |
Rafael J. Wysocki | 64fd1c70 | 2017-06-12 22:48:41 +0200 | [diff] [blame] | 492 | * @context: Device wakeup context. |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 493 | */ |
Rafael J. Wysocki | 64fd1c70 | 2017-06-12 22:48:41 +0200 | [diff] [blame] | 494 | static void pci_acpi_wake_dev(struct acpi_device_wakeup_context *context) |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 495 | { |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 496 | struct pci_dev *pci_dev; |
| 497 | |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 498 | pci_dev = to_pci_dev(context->dev); |
| 499 | |
| 500 | if (pci_dev->pme_poll) |
| 501 | pci_dev->pme_poll = false; |
| 502 | |
| 503 | if (pci_dev->current_state == PCI_D3cold) { |
| 504 | pci_wakeup_event(pci_dev); |
Rafael J. Wysocki | 64fd1c70 | 2017-06-12 22:48:41 +0200 | [diff] [blame] | 505 | pm_request_resume(&pci_dev->dev); |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 506 | return; |
| 507 | } |
| 508 | |
| 509 | /* Clear PME Status if set. */ |
| 510 | if (pci_dev->pme_support) |
| 511 | pci_check_pme_status(pci_dev); |
| 512 | |
| 513 | pci_wakeup_event(pci_dev); |
Rafael J. Wysocki | 64fd1c70 | 2017-06-12 22:48:41 +0200 | [diff] [blame] | 514 | pm_request_resume(&pci_dev->dev); |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 515 | |
Markus Elfring | ff0387c | 2014-11-10 21:02:17 -0700 | [diff] [blame] | 516 | pci_pme_wakeup_bus(pci_dev->subordinate); |
Bjorn Helgaas | 5e3d234 | 2014-09-12 15:36:29 -0600 | [diff] [blame] | 517 | } |
| 518 | |
| 519 | /** |
| 520 | * pci_acpi_add_bus_pm_notifier - Register PM notifier for root PCI bus. |
| 521 | * @dev: PCI root bridge ACPI device. |
| 522 | */ |
| 523 | acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev) |
| 524 | { |
| 525 | return acpi_add_pm_notifier(dev, NULL, pci_acpi_wake_bus); |
| 526 | } |
| 527 | |
| 528 | /** |
| 529 | * pci_acpi_add_pm_notifier - Register PM notifier for given PCI device. |
| 530 | * @dev: ACPI device to add the notifier for. |
| 531 | * @pci_dev: PCI device to check for the PME status if an event is signaled. |
| 532 | */ |
| 533 | acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev, |
| 534 | struct pci_dev *pci_dev) |
| 535 | { |
| 536 | return acpi_add_pm_notifier(dev, &pci_dev->dev, pci_acpi_wake_dev); |
| 537 | } |
| 538 | |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 539 | /* |
| 540 | * _SxD returns the D-state with the highest power |
| 541 | * (lowest D-state number) supported in the S-state "x". |
| 542 | * |
| 543 | * If the devices does not have a _PRW |
| 544 | * (Power Resources for Wake) supporting system wakeup from "x" |
| 545 | * then the OS is free to choose a lower power (higher number |
| 546 | * D-state) than the return value from _SxD. |
| 547 | * |
| 548 | * But if _PRW is enabled at S-state "x", the OS |
| 549 | * must not choose a power lower than _SxD -- |
| 550 | * unless the device has an _SxW method specifying |
| 551 | * the lowest power (highest D-state number) the device |
| 552 | * may enter while still able to wake the system. |
| 553 | * |
| 554 | * ie. depending on global OS policy: |
| 555 | * |
| 556 | * if (_PRW at S-state x) |
| 557 | * choose from highest power _SxD to lowest power _SxW |
| 558 | * else // no _PRW at S-state x |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 559 | * choose highest power _SxD or any lower power |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 560 | */ |
| 561 | |
Rafael J. Wysocki | 8d2bdf4 | 2008-06-05 01:16:37 +0200 | [diff] [blame] | 562 | static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 563 | { |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 564 | int acpi_state, d_max; |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 565 | |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 566 | if (pdev->no_d3cold) |
| 567 | d_max = ACPI_STATE_D3_HOT; |
| 568 | else |
| 569 | d_max = ACPI_STATE_D3_COLD; |
| 570 | acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL, d_max); |
Shaohua Li | ab826ca | 2007-07-20 10:03:22 +0800 | [diff] [blame] | 571 | if (acpi_state < 0) |
| 572 | return PCI_POWER_ERROR; |
| 573 | |
| 574 | switch (acpi_state) { |
| 575 | case ACPI_STATE_D0: |
| 576 | return PCI_D0; |
| 577 | case ACPI_STATE_D1: |
| 578 | return PCI_D1; |
| 579 | case ACPI_STATE_D2: |
| 580 | return PCI_D2; |
Lin Ming | 1cc0c99 | 2012-04-23 09:03:49 +0800 | [diff] [blame] | 581 | case ACPI_STATE_D3_HOT: |
Shaohua Li | ab826ca | 2007-07-20 10:03:22 +0800 | [diff] [blame] | 582 | return PCI_D3hot; |
Lin Ming | 28c2103 | 2011-05-04 22:56:43 +0800 | [diff] [blame] | 583 | case ACPI_STATE_D3_COLD: |
| 584 | return PCI_D3cold; |
Shaohua Li | ab826ca | 2007-07-20 10:03:22 +0800 | [diff] [blame] | 585 | } |
| 586 | return PCI_POWER_ERROR; |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 587 | } |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 588 | |
Mika Westerberg | 26ad34d5 | 2018-09-27 16:57:14 -0500 | [diff] [blame] | 589 | static struct acpi_device *acpi_pci_find_companion(struct device *dev); |
| 590 | |
| 591 | static bool acpi_pci_bridge_d3(struct pci_dev *dev) |
| 592 | { |
| 593 | const struct fwnode_handle *fwnode; |
| 594 | struct acpi_device *adev; |
| 595 | struct pci_dev *root; |
| 596 | u8 val; |
| 597 | |
| 598 | if (!dev->is_hotplug_bridge) |
| 599 | return false; |
| 600 | |
| 601 | /* |
| 602 | * Look for a special _DSD property for the root port and if it |
| 603 | * is set we know the hierarchy behind it supports D3 just fine. |
| 604 | */ |
| 605 | root = pci_find_pcie_root_port(dev); |
| 606 | if (!root) |
| 607 | return false; |
| 608 | |
| 609 | adev = ACPI_COMPANION(&root->dev); |
| 610 | if (root == dev) { |
| 611 | /* |
| 612 | * It is possible that the ACPI companion is not yet bound |
| 613 | * for the root port so look it up manually here. |
| 614 | */ |
| 615 | if (!adev && !pci_dev_is_added(root)) |
| 616 | adev = acpi_pci_find_companion(&root->dev); |
| 617 | } |
| 618 | |
| 619 | if (!adev) |
| 620 | return false; |
| 621 | |
| 622 | fwnode = acpi_fwnode_handle(adev); |
| 623 | if (fwnode_property_read_u8(fwnode, "HotPlugSupportInD3", &val)) |
| 624 | return false; |
| 625 | |
| 626 | return val == 1; |
| 627 | } |
| 628 | |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 629 | static bool acpi_pci_power_manageable(struct pci_dev *dev) |
| 630 | { |
Rafael J. Wysocki | 85dbb3d | 2014-07-24 01:18:53 +0200 | [diff] [blame] | 631 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
| 632 | return adev ? acpi_device_power_manageable(adev) : false; |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 633 | } |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 634 | |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 635 | static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) |
| 636 | { |
Rafael J. Wysocki | 85dbb3d | 2014-07-24 01:18:53 +0200 | [diff] [blame] | 637 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
David Brownell | 583c377 | 2008-02-22 21:41:51 -0800 | [diff] [blame] | 638 | static const u8 state_conv[] = { |
| 639 | [PCI_D0] = ACPI_STATE_D0, |
| 640 | [PCI_D1] = ACPI_STATE_D1, |
| 641 | [PCI_D2] = ACPI_STATE_D2, |
Rafael J. Wysocki | 20dacb7 | 2015-05-16 01:55:35 +0200 | [diff] [blame] | 642 | [PCI_D3hot] = ACPI_STATE_D3_HOT, |
Rafael J. Wysocki | fc6504b | 2013-06-14 00:29:50 +0200 | [diff] [blame] | 643 | [PCI_D3cold] = ACPI_STATE_D3_COLD, |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 644 | }; |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 645 | int error = -EINVAL; |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 646 | |
Shaohua Li | 10b3dca | 2007-07-20 10:03:25 +0800 | [diff] [blame] | 647 | /* If the ACPI device has _EJ0, ignore the device */ |
Rafael J. Wysocki | 85dbb3d | 2014-07-24 01:18:53 +0200 | [diff] [blame] | 648 | if (!adev || acpi_has_method(adev->handle, "_EJ0")) |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 649 | return -ENODEV; |
David Brownell | 583c377 | 2008-02-22 21:41:51 -0800 | [diff] [blame] | 650 | |
| 651 | switch (state) { |
Rafael J. Wysocki | 8b713a8 | 2012-10-24 02:08:38 +0200 | [diff] [blame] | 652 | case PCI_D3cold: |
| 653 | if (dev_pm_qos_flags(&dev->dev, PM_QOS_FLAG_NO_POWER_OFF) == |
| 654 | PM_QOS_FLAGS_ALL) { |
| 655 | error = -EBUSY; |
| 656 | break; |
| 657 | } |
Gustavo A. R. Silva | fa295be | 2018-10-04 17:40:41 +0200 | [diff] [blame] | 658 | /* Fall through */ |
David Brownell | 583c377 | 2008-02-22 21:41:51 -0800 | [diff] [blame] | 659 | case PCI_D0: |
| 660 | case PCI_D1: |
| 661 | case PCI_D2: |
| 662 | case PCI_D3hot: |
Rafael J. Wysocki | 85dbb3d | 2014-07-24 01:18:53 +0200 | [diff] [blame] | 663 | error = acpi_device_set_power(adev, state_conv[state]); |
David Brownell | 583c377 | 2008-02-22 21:41:51 -0800 | [diff] [blame] | 664 | } |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 665 | |
| 666 | if (!error) |
Frederick Lawler | 7506dc7 | 2018-01-18 12:55:24 -0600 | [diff] [blame] | 667 | pci_dbg(dev, "power state changed by ACPI to %s\n", |
Rafael J. Wysocki | fc6504b | 2013-06-14 00:29:50 +0200 | [diff] [blame] | 668 | acpi_power_state_string(state_conv[state])); |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 669 | |
| 670 | return error; |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 671 | } |
| 672 | |
Lukas Wunner | cc7cc02 | 2016-09-18 05:39:20 +0200 | [diff] [blame] | 673 | static pci_power_t acpi_pci_get_power_state(struct pci_dev *dev) |
| 674 | { |
| 675 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
| 676 | static const pci_power_t state_conv[] = { |
| 677 | [ACPI_STATE_D0] = PCI_D0, |
| 678 | [ACPI_STATE_D1] = PCI_D1, |
| 679 | [ACPI_STATE_D2] = PCI_D2, |
| 680 | [ACPI_STATE_D3_HOT] = PCI_D3hot, |
| 681 | [ACPI_STATE_D3_COLD] = PCI_D3cold, |
| 682 | }; |
| 683 | int state; |
| 684 | |
| 685 | if (!adev || !acpi_device_power_manageable(adev)) |
| 686 | return PCI_UNKNOWN; |
| 687 | |
Mika Westerberg | 83a16e3 | 2019-06-25 13:29:40 +0300 | [diff] [blame] | 688 | state = adev->power.state; |
| 689 | if (state == ACPI_STATE_UNKNOWN) |
Lukas Wunner | cc7cc02 | 2016-09-18 05:39:20 +0200 | [diff] [blame] | 690 | return PCI_UNKNOWN; |
| 691 | |
| 692 | return state_conv[state]; |
| 693 | } |
| 694 | |
Rafael J. Wysocki | b51033e | 2019-06-25 14:09:12 +0200 | [diff] [blame] | 695 | static void acpi_pci_refresh_power_state(struct pci_dev *dev) |
| 696 | { |
| 697 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
| 698 | |
| 699 | if (adev && acpi_device_power_manageable(adev)) |
| 700 | acpi_device_update_power(adev, NULL); |
| 701 | } |
| 702 | |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 703 | static int acpi_pci_propagate_wakeup(struct pci_bus *bus, bool enable) |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 704 | { |
| 705 | while (bus->parent) { |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 706 | if (acpi_pm_device_can_wakeup(&bus->self->dev)) |
Rafael J. Wysocki | 1ba51a7 | 2017-08-01 02:56:18 +0200 | [diff] [blame] | 707 | return acpi_pm_set_bridge_wakeup(&bus->self->dev, enable); |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 708 | |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 709 | bus = bus->parent; |
| 710 | } |
| 711 | |
| 712 | /* We have reached the root bus. */ |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 713 | if (bus->bridge) { |
| 714 | if (acpi_pm_device_can_wakeup(bus->bridge)) |
Rafael J. Wysocki | 1ba51a7 | 2017-08-01 02:56:18 +0200 | [diff] [blame] | 715 | return acpi_pm_set_bridge_wakeup(bus->bridge, enable); |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 716 | } |
| 717 | return 0; |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 718 | } |
| 719 | |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 720 | static int acpi_pci_wakeup(struct pci_dev *dev, bool enable) |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 721 | { |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 722 | if (acpi_pm_device_can_wakeup(&dev->dev)) |
Rafael J. Wysocki | 4d183d0 | 2017-06-24 01:54:39 +0200 | [diff] [blame] | 723 | return acpi_pm_set_device_wakeup(&dev->dev, enable); |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 724 | |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 725 | return acpi_pci_propagate_wakeup(dev->bus, enable); |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 726 | } |
| 727 | |
Rafael J. Wysocki | bac2a90 | 2015-01-21 02:17:42 +0100 | [diff] [blame] | 728 | static bool acpi_pci_need_resume(struct pci_dev *dev) |
| 729 | { |
| 730 | struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |
| 731 | |
Rafael J. Wysocki | 26112dd | 2018-06-30 23:19:33 +0200 | [diff] [blame] | 732 | /* |
| 733 | * In some cases (eg. Samsung 305V4A) leaving a bridge in suspend over |
| 734 | * system-wide suspend/resume confuses the platform firmware, so avoid |
Rafael J. Wysocki | 9d64b539 | 2018-08-16 12:56:46 +0200 | [diff] [blame] | 735 | * doing that. According to Section 16.1.6 of ACPI 6.2, endpoint |
Rafael J. Wysocki | 26112dd | 2018-06-30 23:19:33 +0200 | [diff] [blame] | 736 | * devices are expected to be in D3 before invoking the S3 entry path |
| 737 | * from the firmware, so they should not be affected by this issue. |
| 738 | */ |
Rafael J. Wysocki | 9d64b539 | 2018-08-16 12:56:46 +0200 | [diff] [blame] | 739 | if (pci_is_bridge(dev) && acpi_target_system_state() != ACPI_STATE_S0) |
Rafael J. Wysocki | 26112dd | 2018-06-30 23:19:33 +0200 | [diff] [blame] | 740 | return true; |
| 741 | |
Rafael J. Wysocki | bac2a90 | 2015-01-21 02:17:42 +0100 | [diff] [blame] | 742 | if (!adev || !acpi_device_power_manageable(adev)) |
| 743 | return false; |
| 744 | |
Rafael J. Wysocki | 9a51c6b | 2019-05-16 12:42:20 +0200 | [diff] [blame] | 745 | if (adev->wakeup.flags.valid && |
| 746 | device_may_wakeup(&dev->dev) != !!adev->wakeup.prepare_count) |
Rafael J. Wysocki | bac2a90 | 2015-01-21 02:17:42 +0100 | [diff] [blame] | 747 | return true; |
| 748 | |
| 749 | if (acpi_target_system_state() == ACPI_STATE_S0) |
| 750 | return false; |
| 751 | |
| 752 | return !!adev->power.flags.dsw_present; |
| 753 | } |
| 754 | |
Julia Lawall | 299f2ff | 2015-12-06 17:33:45 +0100 | [diff] [blame] | 755 | static const struct pci_platform_pm_ops acpi_pci_platform_pm = { |
Mika Westerberg | 26ad34d5 | 2018-09-27 16:57:14 -0500 | [diff] [blame] | 756 | .bridge_d3 = acpi_pci_bridge_d3, |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 757 | .is_manageable = acpi_pci_power_manageable, |
| 758 | .set_state = acpi_pci_set_power_state, |
Lukas Wunner | cc7cc02 | 2016-09-18 05:39:20 +0200 | [diff] [blame] | 759 | .get_state = acpi_pci_get_power_state, |
Rafael J. Wysocki | b51033e | 2019-06-25 14:09:12 +0200 | [diff] [blame] | 760 | .refresh_state = acpi_pci_refresh_power_state, |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 761 | .choose_state = acpi_pci_choose_state, |
Rafael J. Wysocki | 0847684 | 2017-06-24 01:57:35 +0200 | [diff] [blame] | 762 | .set_wakeup = acpi_pci_wakeup, |
Rafael J. Wysocki | bac2a90 | 2015-01-21 02:17:42 +0100 | [diff] [blame] | 763 | .need_resume = acpi_pci_need_resume, |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 764 | }; |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 765 | |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 766 | void acpi_pci_add_bus(struct pci_bus *bus) |
| 767 | { |
Aaron Lu | e33caa8 | 2015-03-25 14:37:06 +0800 | [diff] [blame] | 768 | union acpi_object *obj; |
| 769 | struct pci_host_bridge *bridge; |
| 770 | |
Vitaly Kuznetsov | a0040c0 | 2017-09-14 16:50:14 +0200 | [diff] [blame] | 771 | if (acpi_pci_disabled || !bus->bridge || !ACPI_HANDLE(bus->bridge)) |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 772 | return; |
| 773 | |
Rafael J. Wysocki | be1c9de | 2013-07-13 23:27:23 +0200 | [diff] [blame] | 774 | acpi_pci_slot_enumerate(bus); |
| 775 | acpiphp_enumerate_slots(bus); |
Aaron Lu | e33caa8 | 2015-03-25 14:37:06 +0800 | [diff] [blame] | 776 | |
| 777 | /* |
| 778 | * For a host bridge, check its _DSM for function 8 and if |
| 779 | * that is available, mark it in pci_host_bridge. |
| 780 | */ |
| 781 | if (!pci_is_root_bus(bus)) |
| 782 | return; |
| 783 | |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 784 | obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_guid, 3, |
Aaron Lu | e33caa8 | 2015-03-25 14:37:06 +0800 | [diff] [blame] | 785 | RESET_DELAY_DSM, NULL); |
| 786 | if (!obj) |
| 787 | return; |
| 788 | |
| 789 | if (obj->type == ACPI_TYPE_INTEGER && obj->integer.value == 1) { |
| 790 | bridge = pci_find_host_bridge(bus); |
| 791 | bridge->ignore_reset_delay = 1; |
| 792 | } |
| 793 | ACPI_FREE(obj); |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 794 | } |
| 795 | |
| 796 | void acpi_pci_remove_bus(struct pci_bus *bus) |
| 797 | { |
Rafael J. Wysocki | be1c9de | 2013-07-13 23:27:23 +0200 | [diff] [blame] | 798 | if (acpi_pci_disabled || !bus->bridge) |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 799 | return; |
| 800 | |
Jiang Liu | 3b63aaa | 2013-04-12 05:44:26 +0000 | [diff] [blame] | 801 | acpiphp_remove_slots(bus); |
Jiang Liu | 5c0b04e | 2013-04-12 05:44:24 +0000 | [diff] [blame] | 802 | acpi_pci_slot_remove(bus); |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 803 | } |
| 804 | |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 805 | /* ACPI bus type */ |
Rafael J. Wysocki | e3f02c5 | 2013-11-29 16:27:34 +0100 | [diff] [blame] | 806 | static struct acpi_device *acpi_pci_find_companion(struct device *dev) |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 807 | { |
Rafael J. Wysocki | 60f75b8 | 2013-08-07 22:55:00 +0200 | [diff] [blame] | 808 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | 5ce79d2 | 2013-11-28 23:58:08 +0100 | [diff] [blame] | 809 | bool check_children; |
Rafael J. Wysocki | 60f75b8 | 2013-08-07 22:55:00 +0200 | [diff] [blame] | 810 | u64 addr; |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 811 | |
Yijing Wang | 6788a51 | 2014-05-04 12:23:38 +0800 | [diff] [blame] | 812 | check_children = pci_is_bridge(pci_dev); |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 813 | /* Please ref to ACPI spec for the syntax of _ADR */ |
| 814 | addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); |
Rafael J. Wysocki | e3f02c5 | 2013-11-29 16:27:34 +0100 | [diff] [blame] | 815 | return acpi_find_child_device(ACPI_COMPANION(dev->parent), addr, |
Rafael J. Wysocki | 5ce79d2 | 2013-11-28 23:58:08 +0100 | [diff] [blame] | 816 | check_children); |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 817 | } |
| 818 | |
Aaron Lu | e33caa8 | 2015-03-25 14:37:06 +0800 | [diff] [blame] | 819 | /** |
| 820 | * pci_acpi_optimize_delay - optimize PCI D3 and D3cold delay from ACPI |
| 821 | * @pdev: the PCI device whose delay is to be updated |
Srinidhi Kasagar | 113e0d1 | 2015-07-15 14:59:46 +0530 | [diff] [blame] | 822 | * @handle: ACPI handle of this device |
Aaron Lu | e33caa8 | 2015-03-25 14:37:06 +0800 | [diff] [blame] | 823 | * |
| 824 | * Update the d3_delay and d3cold_delay of a PCI device from the ACPI _DSM |
| 825 | * control method of either the device itself or the PCI host bridge. |
| 826 | * |
| 827 | * Function 8, "Reset Delay," applies to the entire hierarchy below a PCI |
| 828 | * host bridge. If it returns one, the OS may assume that all devices in |
| 829 | * the hierarchy have already completed power-on reset delays. |
| 830 | * |
| 831 | * Function 9, "Device Readiness Durations," applies only to the object |
| 832 | * where it is located. It returns delay durations required after various |
| 833 | * events if the device requires less time than the spec requires. Delays |
| 834 | * from this function take precedence over the Reset Delay function. |
| 835 | * |
| 836 | * These _DSM functions are defined by the draft ECN of January 28, 2014, |
| 837 | * titled "ACPI additions for FW latency optimizations." |
| 838 | */ |
| 839 | static void pci_acpi_optimize_delay(struct pci_dev *pdev, |
| 840 | acpi_handle handle) |
| 841 | { |
| 842 | struct pci_host_bridge *bridge = pci_find_host_bridge(pdev->bus); |
| 843 | int value; |
| 844 | union acpi_object *obj, *elements; |
| 845 | |
| 846 | if (bridge->ignore_reset_delay) |
| 847 | pdev->d3cold_delay = 0; |
| 848 | |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 849 | obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_guid, 3, |
Aaron Lu | e33caa8 | 2015-03-25 14:37:06 +0800 | [diff] [blame] | 850 | FUNCTION_DELAY_DSM, NULL); |
| 851 | if (!obj) |
| 852 | return; |
| 853 | |
| 854 | if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 5) { |
| 855 | elements = obj->package.elements; |
| 856 | if (elements[0].type == ACPI_TYPE_INTEGER) { |
| 857 | value = (int)elements[0].integer.value / 1000; |
| 858 | if (value < PCI_PM_D3COLD_WAIT) |
| 859 | pdev->d3cold_delay = value; |
| 860 | } |
| 861 | if (elements[3].type == ACPI_TYPE_INTEGER) { |
| 862 | value = (int)elements[3].integer.value / 1000; |
| 863 | if (value < PCI_PM_D3_WAIT) |
| 864 | pdev->d3_delay = value; |
| 865 | } |
| 866 | } |
| 867 | ACPI_FREE(obj); |
| 868 | } |
| 869 | |
Mika Westerberg | 617654a | 2018-08-16 12:28:48 +0300 | [diff] [blame] | 870 | static void pci_acpi_set_untrusted(struct pci_dev *dev) |
| 871 | { |
| 872 | u8 val; |
| 873 | |
| 874 | if (pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) |
| 875 | return; |
| 876 | if (device_property_read_u8(&dev->dev, "ExternalFacingPort", &val)) |
| 877 | return; |
| 878 | |
| 879 | /* |
| 880 | * These root ports expose PCIe (including DMA) outside of the |
| 881 | * system so make sure we treat them and everything behind as |
| 882 | * untrusted. |
| 883 | */ |
| 884 | if (val) |
| 885 | dev->untrusted = 1; |
| 886 | } |
| 887 | |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 888 | static void pci_acpi_setup(struct device *dev) |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 889 | { |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 890 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | f084280 | 2013-12-29 23:37:15 +0100 | [diff] [blame] | 891 | struct acpi_device *adev = ACPI_COMPANION(dev); |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 892 | |
Rafael J. Wysocki | f084280 | 2013-12-29 23:37:15 +0100 | [diff] [blame] | 893 | if (!adev) |
| 894 | return; |
| 895 | |
Aaron Lu | e33caa8 | 2015-03-25 14:37:06 +0800 | [diff] [blame] | 896 | pci_acpi_optimize_delay(pci_dev, adev->handle); |
Mika Westerberg | 617654a | 2018-08-16 12:28:48 +0300 | [diff] [blame] | 897 | pci_acpi_set_untrusted(pci_dev); |
Aaron Lu | e33caa8 | 2015-03-25 14:37:06 +0800 | [diff] [blame] | 898 | |
Rafael J. Wysocki | f084280 | 2013-12-29 23:37:15 +0100 | [diff] [blame] | 899 | pci_acpi_add_pm_notifier(adev, pci_dev); |
| 900 | if (!adev->wakeup.flags.valid) |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 901 | return; |
| 902 | |
| 903 | device_set_wakeup_capable(dev, true); |
Mika Westerberg | 6299cf9 | 2018-09-27 16:54:13 -0500 | [diff] [blame] | 904 | /* |
| 905 | * For bridges that can do D3 we enable wake automatically (as |
| 906 | * we do for the power management itself in that case). The |
| 907 | * reason is that the bridge may have additional methods such as |
| 908 | * _DSW that need to be called. |
| 909 | */ |
| 910 | if (pci_dev->bridge_d3) |
| 911 | device_wakeup_enable(dev); |
| 912 | |
Rafael J. Wysocki | 8370c2d | 2017-06-24 01:56:13 +0200 | [diff] [blame] | 913 | acpi_pci_wakeup(pci_dev, false); |
Mika Westerberg | 53b22f9 | 2019-06-25 13:29:42 +0300 | [diff] [blame] | 914 | acpi_device_power_add_dependent(adev, dev); |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 915 | } |
| 916 | |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 917 | static void pci_acpi_cleanup(struct device *dev) |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 918 | { |
Rafael J. Wysocki | f084280 | 2013-12-29 23:37:15 +0100 | [diff] [blame] | 919 | struct acpi_device *adev = ACPI_COMPANION(dev); |
Mika Westerberg | 6299cf9 | 2018-09-27 16:54:13 -0500 | [diff] [blame] | 920 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 921 | |
Rafael J. Wysocki | f084280 | 2013-12-29 23:37:15 +0100 | [diff] [blame] | 922 | if (!adev) |
| 923 | return; |
| 924 | |
| 925 | pci_acpi_remove_pm_notifier(adev); |
Mika Westerberg | 6299cf9 | 2018-09-27 16:54:13 -0500 | [diff] [blame] | 926 | if (adev->wakeup.flags.valid) { |
Mika Westerberg | 53b22f9 | 2019-06-25 13:29:42 +0300 | [diff] [blame] | 927 | acpi_device_power_remove_dependent(adev, dev); |
Mika Westerberg | 6299cf9 | 2018-09-27 16:54:13 -0500 | [diff] [blame] | 928 | if (pci_dev->bridge_d3) |
| 929 | device_wakeup_disable(dev); |
| 930 | |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 931 | device_set_wakeup_capable(dev, false); |
Mika Westerberg | 6299cf9 | 2018-09-27 16:54:13 -0500 | [diff] [blame] | 932 | } |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 933 | } |
| 934 | |
Rafael J. Wysocki | 5354009 | 2013-03-03 22:35:20 +0100 | [diff] [blame] | 935 | static bool pci_acpi_bus_match(struct device *dev) |
| 936 | { |
Yijing Wang | 40c368c | 2013-12-05 19:52:53 +0800 | [diff] [blame] | 937 | return dev_is_pci(dev); |
Rafael J. Wysocki | 5354009 | 2013-03-03 22:35:20 +0100 | [diff] [blame] | 938 | } |
| 939 | |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 940 | static struct acpi_bus_type acpi_pci_bus = { |
Rafael J. Wysocki | 5354009 | 2013-03-03 22:35:20 +0100 | [diff] [blame] | 941 | .name = "PCI", |
| 942 | .match = pci_acpi_bus_match, |
Rafael J. Wysocki | e3f02c5 | 2013-11-29 16:27:34 +0100 | [diff] [blame] | 943 | .find_companion = acpi_pci_find_companion, |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 944 | .setup = pci_acpi_setup, |
| 945 | .cleanup = pci_acpi_cleanup, |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 946 | }; |
| 947 | |
Suravee Suthikulpanit | 471036b | 2015-12-10 08:55:27 -0800 | [diff] [blame] | 948 | |
| 949 | static struct fwnode_handle *(*pci_msi_get_fwnode_cb)(struct device *dev); |
| 950 | |
| 951 | /** |
| 952 | * pci_msi_register_fwnode_provider - Register callback to retrieve fwnode |
| 953 | * @fn: Callback matching a device to a fwnode that identifies a PCI |
| 954 | * MSI domain. |
| 955 | * |
| 956 | * This should be called by irqchip driver, which is the parent of |
| 957 | * the MSI domain to provide callback interface to query fwnode. |
| 958 | */ |
| 959 | void |
| 960 | pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *)) |
| 961 | { |
| 962 | pci_msi_get_fwnode_cb = fn; |
| 963 | } |
| 964 | |
| 965 | /** |
| 966 | * pci_host_bridge_acpi_msi_domain - Retrieve MSI domain of a PCI host bridge |
| 967 | * @bus: The PCI host bridge bus. |
| 968 | * |
| 969 | * This function uses the callback function registered by |
| 970 | * pci_msi_register_fwnode_provider() to retrieve the irq_domain with |
| 971 | * type DOMAIN_BUS_PCI_MSI of the specified host bridge bus. |
| 972 | * This returns NULL on error or when the domain is not found. |
| 973 | */ |
| 974 | struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) |
| 975 | { |
| 976 | struct fwnode_handle *fwnode; |
| 977 | |
| 978 | if (!pci_msi_get_fwnode_cb) |
| 979 | return NULL; |
| 980 | |
| 981 | fwnode = pci_msi_get_fwnode_cb(&bus->dev); |
| 982 | if (!fwnode) |
| 983 | return NULL; |
| 984 | |
| 985 | return irq_find_matching_fwnode(fwnode, DOMAIN_BUS_PCI_MSI); |
| 986 | } |
| 987 | |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 988 | static int __init acpi_pci_init(void) |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 989 | { |
| 990 | int ret; |
| 991 | |
Bob Moore | 993958f | 2009-02-03 15:14:33 +0800 | [diff] [blame] | 992 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) { |
Yijing Wang | e7d4515 | 2013-05-28 16:03:46 +0800 | [diff] [blame] | 993 | pr_info("ACPI FADT declares the system doesn't support MSI, so disable it\n"); |
Shaohua Li | f8993af | 2007-04-25 11:05:12 +0800 | [diff] [blame] | 994 | pci_no_msi(); |
| 995 | } |
Shaohua Li | 5fde244 | 2008-07-23 10:32:24 +0800 | [diff] [blame] | 996 | |
Bob Moore | 993958f | 2009-02-03 15:14:33 +0800 | [diff] [blame] | 997 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { |
Yijing Wang | e7d4515 | 2013-05-28 16:03:46 +0800 | [diff] [blame] | 998 | pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n"); |
Shaohua Li | 5fde244 | 2008-07-23 10:32:24 +0800 | [diff] [blame] | 999 | pcie_no_aspm(); |
| 1000 | } |
| 1001 | |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 1002 | ret = register_acpi_bus_type(&acpi_pci_bus); |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 1003 | if (ret) |
| 1004 | return 0; |
Jiang Liu | 5c0b04e | 2013-04-12 05:44:24 +0000 | [diff] [blame] | 1005 | |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 1006 | pci_set_platform_pm(&acpi_pci_platform_pm); |
Jiang Liu | 5c0b04e | 2013-04-12 05:44:24 +0000 | [diff] [blame] | 1007 | acpi_pci_slot_init(); |
Jiang Liu | 3b63aaa | 2013-04-12 05:44:26 +0000 | [diff] [blame] | 1008 | acpiphp_init(); |
Jiang Liu | 5c0b04e | 2013-04-12 05:44:24 +0000 | [diff] [blame] | 1009 | |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 1010 | return 0; |
| 1011 | } |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 1012 | arch_initcall(acpi_pci_init); |