Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * File: portdrv_core.c |
| 3 | * Purpose: PCI Express Port Bus Driver's Core Functions |
| 4 | * |
| 5 | * Copyright (C) 2004 Intel |
| 6 | * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com) |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/pci.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/errno.h> |
| 13 | #include <linux/pm.h> |
Mika Westerberg | 006d44e | 2016-06-02 11:17:15 +0300 | [diff] [blame] | 14 | #include <linux/pm_runtime.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 15 | #include <linux/string.h> |
| 16 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/pcieport_if.h> |
Rafael J. Wysocki | 28eb5f2 | 2010-08-21 22:02:38 +0200 | [diff] [blame] | 18 | #include <linux/aer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Rafael J. Wysocki | 1bf83e55 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 20 | #include "../pci.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "portdrv.h" |
| 22 | |
MUNEDA Takahiro | 7570a33 | 2012-02-02 11:09:22 -0500 | [diff] [blame] | 23 | bool pciehp_msi_disabled; |
| 24 | |
| 25 | static int __init pciehp_setup(char *str) |
| 26 | { |
| 27 | if (!strncmp(str, "nomsi", 5)) |
| 28 | pciehp_msi_disabled = true; |
| 29 | |
| 30 | return 1; |
| 31 | } |
| 32 | __setup("pcie_hp=", pciehp_setup); |
| 33 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 34 | /** |
| 35 | * release_pcie_device - free PCI Express port service device structure |
| 36 | * @dev: Port service device to release |
| 37 | * |
| 38 | * Invoked automatically when device is being removed in response to |
| 39 | * device_unregister(dev). Release all resources being claimed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | */ |
| 41 | static void release_pcie_device(struct device *dev) |
| 42 | { |
Hidetoshi Seto | 40da418 | 2009-12-15 11:38:04 +0900 | [diff] [blame] | 43 | kfree(to_pcie_device(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | } |
| 45 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 46 | /** |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 47 | * pcie_port_msix_add_entry - add entry to given array of MSI-X entries |
| 48 | * @entries: Array of MSI-X entries |
| 49 | * @new_entry: Index of the entry to add to the array |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 50 | * @nr_entries: Number of entries already in the array |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 51 | * |
| 52 | * Return value: Position of the added entry in the array |
| 53 | */ |
| 54 | static int pcie_port_msix_add_entry( |
| 55 | struct msix_entry *entries, int new_entry, int nr_entries) |
| 56 | { |
| 57 | int j; |
| 58 | |
| 59 | for (j = 0; j < nr_entries; j++) |
| 60 | if (entries[j].entry == new_entry) |
| 61 | return j; |
| 62 | |
| 63 | entries[j].entry = new_entry; |
| 64 | return j; |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * pcie_port_enable_msix - try to set up MSI-X as interrupt mode for given port |
| 69 | * @dev: PCI Express port to handle |
| 70 | * @vectors: Array of interrupt vectors to populate |
| 71 | * @mask: Bitmask of port capabilities returned by get_port_device_capability() |
| 72 | * |
| 73 | * Return value: 0 on success, error code on failure |
| 74 | */ |
| 75 | static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask) |
| 76 | { |
| 77 | struct msix_entry *msix_entries; |
| 78 | int idx[PCIE_PORT_DEVICE_MAXSERVICES]; |
| 79 | int nr_entries, status, pos, i, nvec; |
| 80 | u16 reg16; |
| 81 | u32 reg32; |
| 82 | |
Alexander Gordeev | ff1aa43 | 2013-12-30 08:28:15 +0100 | [diff] [blame] | 83 | nr_entries = pci_msix_vec_count(dev); |
| 84 | if (nr_entries < 0) |
| 85 | return nr_entries; |
| 86 | BUG_ON(!nr_entries); |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 87 | if (nr_entries > PCIE_PORT_MAX_MSIX_ENTRIES) |
| 88 | nr_entries = PCIE_PORT_MAX_MSIX_ENTRIES; |
| 89 | |
| 90 | msix_entries = kzalloc(sizeof(*msix_entries) * nr_entries, GFP_KERNEL); |
| 91 | if (!msix_entries) |
| 92 | return -ENOMEM; |
| 93 | |
| 94 | /* |
| 95 | * Allocate as many entries as the port wants, so that we can check |
| 96 | * which of them will be useful. Moreover, if nr_entries is correctly |
| 97 | * equal to the number of entries this port actually uses, we'll happily |
| 98 | * go through without any tricks. |
| 99 | */ |
| 100 | for (i = 0; i < nr_entries; i++) |
| 101 | msix_entries[i].entry = i; |
| 102 | |
Alexander Gordeev | 9ada07b | 2014-03-06 21:11:22 +0100 | [diff] [blame] | 103 | status = pci_enable_msix_exact(dev, msix_entries, nr_entries); |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 104 | if (status) |
| 105 | goto Exit; |
| 106 | |
| 107 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
| 108 | idx[i] = -1; |
| 109 | status = -EIO; |
| 110 | nvec = 0; |
| 111 | |
| 112 | if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) { |
| 113 | int entry; |
| 114 | |
| 115 | /* |
| 116 | * The code below follows the PCI Express Base Specification 2.0 |
| 117 | * stating in Section 6.1.6 that "PME and Hot-Plug Event |
| 118 | * interrupts (when both are implemented) always share the same |
| 119 | * MSI or MSI-X vector, as indicated by the Interrupt Message |
| 120 | * Number field in the PCI Express Capabilities register", where |
| 121 | * according to Section 7.8.2 of the specification "For MSI-X, |
| 122 | * the value in this field indicates which MSI-X Table entry is |
| 123 | * used to generate the interrupt message." |
| 124 | */ |
Bjorn Helgaas | 33e8b34fd | 2012-12-05 13:51:18 -0700 | [diff] [blame] | 125 | pcie_capability_read_word(dev, PCI_EXP_FLAGS, ®16); |
Kenji Kaneshige | f9f4560 | 2009-11-25 21:06:51 +0900 | [diff] [blame] | 126 | entry = (reg16 & PCI_EXP_FLAGS_IRQ) >> 9; |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 127 | if (entry >= nr_entries) |
| 128 | goto Error; |
| 129 | |
| 130 | i = pcie_port_msix_add_entry(msix_entries, entry, nvec); |
| 131 | if (i == nvec) |
| 132 | nvec++; |
| 133 | |
| 134 | idx[PCIE_PORT_SERVICE_PME_SHIFT] = i; |
| 135 | idx[PCIE_PORT_SERVICE_HP_SHIFT] = i; |
| 136 | } |
| 137 | |
| 138 | if (mask & PCIE_PORT_SERVICE_AER) { |
| 139 | int entry; |
| 140 | |
| 141 | /* |
| 142 | * The code below follows Section 7.10.10 of the PCI Express |
| 143 | * Base Specification 2.0 stating that bits 31-27 of the Root |
| 144 | * Error Status Register contain a value indicating which of the |
| 145 | * MSI/MSI-X vectors assigned to the port is going to be used |
| 146 | * for AER, where "For MSI-X, the value in this register |
| 147 | * indicates which MSI-X Table entry is used to generate the |
| 148 | * interrupt message." |
| 149 | */ |
| 150 | pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR); |
| 151 | pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, ®32); |
| 152 | entry = reg32 >> 27; |
| 153 | if (entry >= nr_entries) |
| 154 | goto Error; |
| 155 | |
| 156 | i = pcie_port_msix_add_entry(msix_entries, entry, nvec); |
| 157 | if (i == nvec) |
| 158 | nvec++; |
| 159 | |
| 160 | idx[PCIE_PORT_SERVICE_AER_SHIFT] = i; |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * If nvec is equal to the allocated number of entries, we can just use |
| 165 | * what we have. Otherwise, the port has some extra entries not for the |
| 166 | * services we know and we need to work around that. |
| 167 | */ |
| 168 | if (nvec == nr_entries) { |
| 169 | status = 0; |
| 170 | } else { |
| 171 | /* Drop the temporary MSI-X setup */ |
| 172 | pci_disable_msix(dev); |
| 173 | |
| 174 | /* Now allocate the MSI-X vectors for real */ |
Alexander Gordeev | 9ada07b | 2014-03-06 21:11:22 +0100 | [diff] [blame] | 175 | status = pci_enable_msix_exact(dev, msix_entries, nvec); |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 176 | if (status) |
| 177 | goto Exit; |
| 178 | } |
| 179 | |
| 180 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
| 181 | vectors[i] = idx[i] >= 0 ? msix_entries[idx[i]].vector : -1; |
| 182 | |
| 183 | Exit: |
| 184 | kfree(msix_entries); |
| 185 | return status; |
| 186 | |
| 187 | Error: |
| 188 | pci_disable_msix(dev); |
| 189 | goto Exit; |
| 190 | } |
| 191 | |
| 192 | /** |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 193 | * init_service_irqs - initialize irqs for PCI Express port services |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 194 | * @dev: PCI Express port to handle |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 195 | * @irqs: Array of irqs to populate |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 196 | * @mask: Bitmask of port capabilities returned by get_port_device_capability() |
| 197 | * |
| 198 | * Return value: Interrupt mode associated with the port |
| 199 | */ |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 200 | static int init_service_irqs(struct pci_dev *dev, int *irqs, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | { |
Rafael J. Wysocki | c39fae1 | 2010-02-17 23:40:07 +0100 | [diff] [blame] | 202 | int i, irq = -1; |
| 203 | |
Shengzhou Liu | e237d83 | 2012-07-18 14:06:54 +0800 | [diff] [blame] | 204 | /* |
| 205 | * If MSI cannot be used for PCIe PME or hotplug, we have to use |
| 206 | * INTx or other interrupts, e.g. system shared interrupt. |
| 207 | */ |
MUNEDA Takahiro | 7570a33 | 2012-02-02 11:09:22 -0500 | [diff] [blame] | 208 | if (((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) || |
| 209 | ((mask & PCIE_PORT_SERVICE_HP) && pciehp_no_msi())) { |
Shengzhou Liu | e237d83 | 2012-07-18 14:06:54 +0800 | [diff] [blame] | 210 | if (dev->irq) |
Rafael J. Wysocki | c39fae1 | 2010-02-17 23:40:07 +0100 | [diff] [blame] | 211 | irq = dev->irq; |
| 212 | goto no_msi; |
| 213 | } |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 214 | |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 215 | /* Try to use MSI-X if supported */ |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 216 | if (!pcie_port_enable_msix(dev, irqs, mask)) |
| 217 | return 0; |
Rafael J. Wysocki | c39fae1 | 2010-02-17 23:40:07 +0100 | [diff] [blame] | 218 | |
Shengzhou Liu | e237d83 | 2012-07-18 14:06:54 +0800 | [diff] [blame] | 219 | /* |
| 220 | * We're not going to use MSI-X, so try MSI and fall back to INTx. |
| 221 | * If neither MSI/MSI-X nor INTx available, try other interrupt. On |
| 222 | * some platforms, root port doesn't support MSI/MSI-X/INTx in RC mode. |
| 223 | */ |
| 224 | if (!pci_enable_msi(dev) || dev->irq) |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 225 | irq = dev->irq; |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 226 | |
Rafael J. Wysocki | c39fae1 | 2010-02-17 23:40:07 +0100 | [diff] [blame] | 227 | no_msi: |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 228 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 229 | irqs[i] = irq; |
| 230 | irqs[PCIE_PORT_SERVICE_VC_SHIFT] = -1; |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 231 | |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 232 | if (irq < 0) |
| 233 | return -ENODEV; |
| 234 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | } |
| 236 | |
Kenji Kaneshige | fbb5de7 | 2009-11-25 21:05:01 +0900 | [diff] [blame] | 237 | static void cleanup_service_irqs(struct pci_dev *dev) |
| 238 | { |
| 239 | if (dev->msix_enabled) |
| 240 | pci_disable_msix(dev); |
| 241 | else if (dev->msi_enabled) |
| 242 | pci_disable_msi(dev); |
| 243 | } |
| 244 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 245 | /** |
| 246 | * get_port_device_capability - discover capabilities of a PCI Express port |
| 247 | * @dev: PCI Express port to examine |
| 248 | * |
| 249 | * The capabilities are read from the port's PCI Express configuration registers |
| 250 | * as described in PCI Express Base Specification 1.0a sections 7.8.2, 7.8.9 and |
| 251 | * 7.9 - 7.11. |
| 252 | * |
| 253 | * Return value: Bitmask of discovered port capabilities |
| 254 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | static int get_port_device_capability(struct pci_dev *dev) |
| 256 | { |
Jiang Liu | 2dcfaf8 | 2012-07-24 17:20:08 +0800 | [diff] [blame] | 257 | int services = 0; |
Chunhe Lan | 1267b3a | 2012-03-07 15:16:26 +0800 | [diff] [blame] | 258 | int cap_mask = 0; |
Rafael J. Wysocki | 28eb5f2 | 2010-08-21 22:02:38 +0200 | [diff] [blame] | 259 | |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 260 | if (pcie_ports_disabled) |
| 261 | return 0; |
| 262 | |
Andrew Murray | 6b87e70 | 2013-10-26 18:23:25 +0100 | [diff] [blame] | 263 | cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP |
Keith Busch | 10126ac | 2016-05-02 15:10:31 -0500 | [diff] [blame] | 264 | | PCIE_PORT_SERVICE_VC | PCIE_PORT_SERVICE_DPC; |
Andrew Murray | 6b87e70 | 2013-10-26 18:23:25 +0100 | [diff] [blame] | 265 | if (pci_aer_available()) |
| 266 | cap_mask |= PCIE_PORT_SERVICE_AER; |
| 267 | |
Jon Derrick | 88a97da | 2016-04-08 11:35:51 -0600 | [diff] [blame] | 268 | if (pcie_ports_auto) |
| 269 | pcie_port_platform_notify(dev, &cap_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | /* Hot-Plug Capable */ |
Lukas Wunner | f841522 | 2016-05-04 16:58:11 -0500 | [diff] [blame] | 272 | if ((cap_mask & PCIE_PORT_SERVICE_HP) && dev->is_hotplug_bridge) { |
| 273 | services |= PCIE_PORT_SERVICE_HP; |
| 274 | /* |
| 275 | * Disable hot-plug interrupts in case they have been enabled |
| 276 | * by the BIOS and the hot-plug service driver is not loaded. |
| 277 | */ |
| 278 | pcie_capability_clear_word(dev, PCI_EXP_SLTCTL, |
| 279 | PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE); |
Rafael J. Wysocki | 1bf83e55 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 280 | } |
| 281 | /* AER capable */ |
Rafael J. Wysocki | 28eb5f2 | 2010-08-21 22:02:38 +0200 | [diff] [blame] | 282 | if ((cap_mask & PCIE_PORT_SERVICE_AER) |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 283 | && pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) { |
Jesse Barnes | 0927678 | 2008-10-18 17:33:19 -0700 | [diff] [blame] | 284 | services |= PCIE_PORT_SERVICE_AER; |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 285 | /* |
| 286 | * Disable AER on this port in case it's been enabled by the |
| 287 | * BIOS (the AER service driver will enable it when necessary). |
| 288 | */ |
| 289 | pci_disable_pcie_error_reporting(dev); |
| 290 | } |
Rafael J. Wysocki | 1bf83e55 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 291 | /* VC support */ |
Jesse Barnes | 0927678 | 2008-10-18 17:33:19 -0700 | [diff] [blame] | 292 | if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC)) |
| 293 | services |= PCIE_PORT_SERVICE_VC; |
Kenji Kaneshige | 9e5d0b1 | 2009-11-25 21:02:51 +0900 | [diff] [blame] | 294 | /* Root ports are capable of generating PME too */ |
Rafael J. Wysocki | 28eb5f2 | 2010-08-21 22:02:38 +0200 | [diff] [blame] | 295 | if ((cap_mask & PCIE_PORT_SERVICE_PME) |
Yijing Wang | 62f87c0 | 2012-07-24 17:20:03 +0800 | [diff] [blame] | 296 | && pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) { |
Kenji Kaneshige | 9e5d0b1 | 2009-11-25 21:02:51 +0900 | [diff] [blame] | 297 | services |= PCIE_PORT_SERVICE_PME; |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 298 | /* |
| 299 | * Disable PME interrupt on this port in case it's been enabled |
| 300 | * by the BIOS (the PME service driver will enable it when |
| 301 | * necessary). |
| 302 | */ |
| 303 | pcie_pme_interrupt_enable(dev, false); |
| 304 | } |
Keith Busch | 10126ac | 2016-05-02 15:10:31 -0500 | [diff] [blame] | 305 | if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_DPC)) |
| 306 | services |= PCIE_PORT_SERVICE_DPC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | return services; |
| 309 | } |
| 310 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 311 | /** |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 312 | * pcie_device_init - allocate and initialize PCI Express port service device |
| 313 | * @pdev: PCI Express port to associate the service device with |
| 314 | * @service: Type of service to associate with the service device |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 315 | * @irq: Interrupt vector to associate with the service device |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 316 | */ |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 317 | static int pcie_device_init(struct pci_dev *pdev, int service, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | { |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 319 | int retval; |
| 320 | struct pcie_device *pcie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | struct device *device; |
| 322 | |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 323 | pcie = kzalloc(sizeof(*pcie), GFP_KERNEL); |
| 324 | if (!pcie) |
| 325 | return -ENOMEM; |
| 326 | pcie->port = pdev; |
| 327 | pcie->irq = irq; |
| 328 | pcie->service = service; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | /* Initialize generic device interface */ |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 331 | device = &pcie->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | device->bus = &pcie_port_bus_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | device->release = release_pcie_device; /* callback to free pcie dev */ |
Keith Busch | 6d81417 | 2016-05-03 09:58:11 -0500 | [diff] [blame] | 334 | dev_set_name(device, "%s:pcie%03x", |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 335 | pci_name(pdev), |
Yijing Wang | 62f87c0 | 2012-07-24 17:20:03 +0800 | [diff] [blame] | 336 | get_descriptor_id(pci_pcie_type(pdev), service)); |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 337 | device->parent = &pdev->dev; |
Rafael J. Wysocki | a1e4d72 | 2010-02-08 19:16:33 +0100 | [diff] [blame] | 338 | device_enable_async_suspend(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 340 | retval = device_register(device); |
Bjorn Helgaas | 8f3acca | 2013-12-19 14:20:09 -0700 | [diff] [blame] | 341 | if (retval) { |
Levente Kurusa | f398620 | 2013-12-19 14:22:35 -0700 | [diff] [blame] | 342 | put_device(device); |
Bjorn Helgaas | 8f3acca | 2013-12-19 14:20:09 -0700 | [diff] [blame] | 343 | return retval; |
| 344 | } |
| 345 | |
Mika Westerberg | 006d44e | 2016-06-02 11:17:15 +0300 | [diff] [blame] | 346 | pm_runtime_no_callbacks(device); |
| 347 | |
Bjorn Helgaas | 8f3acca | 2013-12-19 14:20:09 -0700 | [diff] [blame] | 348 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 351 | /** |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 352 | * pcie_port_device_register - register PCI Express port |
| 353 | * @dev: PCI Express port to register |
| 354 | * |
| 355 | * Allocate the port extension structure and register services associated with |
| 356 | * the port. |
| 357 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | int pcie_port_device_register(struct pci_dev *dev) |
| 359 | { |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 360 | int status, capabilities, i, nr_service; |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 361 | int irqs[PCIE_PORT_DEVICE_MAXSERVICES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Kenji Kaneshige | 1ce5e83 | 2009-11-25 21:04:30 +0900 | [diff] [blame] | 363 | /* Enable PCI Express port device */ |
| 364 | status = pci_enable_device(dev); |
| 365 | if (status) |
Kenji Kaneshige | 694f88e | 2009-11-25 21:06:15 +0900 | [diff] [blame] | 366 | return status; |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 367 | |
| 368 | /* Get and check PCI Express port services */ |
| 369 | capabilities = get_port_device_capability(dev); |
Naga Chumbalkar | eca6731 | 2011-03-21 03:29:20 +0000 | [diff] [blame] | 370 | if (!capabilities) |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 371 | return 0; |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 372 | |
Kenji Kaneshige | 1ce5e83 | 2009-11-25 21:04:30 +0900 | [diff] [blame] | 373 | pci_set_master(dev); |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 374 | /* |
| 375 | * Initialize service irqs. Don't use service devices that |
| 376 | * require interrupts if there is no way to generate them. |
Rajat Jain | 374a914 | 2014-03-31 16:51:23 -0700 | [diff] [blame] | 377 | * However, some drivers may have a polling mode (e.g. pciehp_poll_mode) |
| 378 | * that can be used in the absence of irqs. Allow them to determine |
| 379 | * if that is to be used. |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 380 | */ |
| 381 | status = init_service_irqs(dev, irqs, capabilities); |
| 382 | if (status) { |
Rajat Jain | 374a914 | 2014-03-31 16:51:23 -0700 | [diff] [blame] | 383 | capabilities &= PCIE_PORT_SERVICE_VC | PCIE_PORT_SERVICE_HP; |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 384 | if (!capabilities) |
Kenji Kaneshige | 1ce5e83 | 2009-11-25 21:04:30 +0900 | [diff] [blame] | 385 | goto error_disable; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 386 | } |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 387 | |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 388 | /* Allocate child services if any */ |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 389 | status = -ENODEV; |
| 390 | nr_service = 0; |
| 391 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) { |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 392 | int service = 1 << i; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 393 | if (!(capabilities & service)) |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 394 | continue; |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 395 | if (!pcie_device_init(dev, service, irqs[i])) |
| 396 | nr_service++; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 397 | } |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 398 | if (!nr_service) |
Kenji Kaneshige | fbb5de7 | 2009-11-25 21:05:01 +0900 | [diff] [blame] | 399 | goto error_cleanup_irqs; |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return 0; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 402 | |
Kenji Kaneshige | fbb5de7 | 2009-11-25 21:05:01 +0900 | [diff] [blame] | 403 | error_cleanup_irqs: |
| 404 | cleanup_service_irqs(dev); |
Kenji Kaneshige | 1ce5e83 | 2009-11-25 21:04:30 +0900 | [diff] [blame] | 405 | error_disable: |
| 406 | pci_disable_device(dev); |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 407 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | #ifdef CONFIG_PM |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 411 | static int suspend_iter(struct device *dev, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | struct pcie_port_service_driver *service_driver; |
| 414 | |
Hidetoshi Seto | 40da418 | 2009-12-15 11:38:04 +0900 | [diff] [blame] | 415 | if ((dev->bus == &pcie_port_bus_type) && dev->driver) { |
| 416 | service_driver = to_service_driver(dev->driver); |
| 417 | if (service_driver->suspend) |
| 418 | service_driver->suspend(to_pcie_device(dev)); |
| 419 | } |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 420 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | } |
| 422 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 423 | /** |
| 424 | * pcie_port_device_suspend - suspend port services associated with a PCIe port |
| 425 | * @dev: PCI Express port to handle |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 426 | */ |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 427 | int pcie_port_device_suspend(struct device *dev) |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 428 | { |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 429 | return device_for_each_child(dev, NULL, suspend_iter); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | static int resume_iter(struct device *dev, void *data) |
| 433 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | struct pcie_port_service_driver *service_driver; |
| 435 | |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 436 | if ((dev->bus == &pcie_port_bus_type) && |
| 437 | (dev->driver)) { |
| 438 | service_driver = to_service_driver(dev->driver); |
| 439 | if (service_driver->resume) |
| 440 | service_driver->resume(to_pcie_device(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 442 | return 0; |
| 443 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 445 | /** |
Bjorn Helgaas | e7f6c6d | 2015-06-24 16:03:23 -0500 | [diff] [blame] | 446 | * pcie_port_device_resume - resume port services associated with a PCIe port |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 447 | * @dev: PCI Express port to handle |
| 448 | */ |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 449 | int pcie_port_device_resume(struct device *dev) |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 450 | { |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 451 | return device_for_each_child(dev, NULL, resume_iter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 453 | #endif /* PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 455 | static int remove_iter(struct device *dev, void *data) |
| 456 | { |
Bjorn Helgaas | e75f34c | 2013-12-19 14:24:13 -0700 | [diff] [blame] | 457 | if (dev->bus == &pcie_port_bus_type) |
Eric W. Biederman | ae40582 | 2009-02-20 20:16:07 -0800 | [diff] [blame] | 458 | device_unregister(dev); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 459 | return 0; |
| 460 | } |
| 461 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 462 | /** |
| 463 | * pcie_port_device_remove - unregister PCI Express port service devices |
| 464 | * @dev: PCI Express port the service devices to unregister are associated with |
| 465 | * |
| 466 | * Remove PCI Express port service devices associated with given port and |
| 467 | * disable MSI-X or MSI for the port. |
| 468 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | void pcie_port_device_remove(struct pci_dev *dev) |
| 470 | { |
Eric W. Biederman | ae40582 | 2009-02-20 20:16:07 -0800 | [diff] [blame] | 471 | device_for_each_child(&dev->dev, NULL, remove_iter); |
Kenji Kaneshige | fbb5de7 | 2009-11-25 21:05:01 +0900 | [diff] [blame] | 472 | cleanup_service_irqs(dev); |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 473 | pci_disable_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | } |
| 475 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 476 | /** |
| 477 | * pcie_port_probe_service - probe driver for given PCI Express port service |
| 478 | * @dev: PCI Express port service device to probe against |
| 479 | * |
| 480 | * If PCI Express port service driver is registered with |
| 481 | * pcie_port_service_register(), this function will be called by the driver core |
| 482 | * whenever match is found between the driver and a port service device. |
| 483 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 484 | static int pcie_port_probe_service(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 486 | struct pcie_device *pciedev; |
| 487 | struct pcie_port_service_driver *driver; |
| 488 | int status; |
| 489 | |
| 490 | if (!dev || !dev->driver) |
| 491 | return -ENODEV; |
| 492 | |
| 493 | driver = to_service_driver(dev->driver); |
| 494 | if (!driver || !driver->probe) |
| 495 | return -ENODEV; |
| 496 | |
| 497 | pciedev = to_pcie_device(dev); |
Rafael J. Wysocki | 0516c8b | 2009-01-13 14:44:19 +0100 | [diff] [blame] | 498 | status = driver->probe(pciedev); |
Bjorn Helgaas | 8f3acca | 2013-12-19 14:20:09 -0700 | [diff] [blame] | 499 | if (status) |
| 500 | return status; |
| 501 | |
| 502 | dev_printk(KERN_DEBUG, dev, "service driver %s loaded\n", driver->name); |
| 503 | get_device(dev); |
| 504 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
| 506 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 507 | /** |
| 508 | * pcie_port_remove_service - detach driver from given PCI Express port service |
| 509 | * @dev: PCI Express port service device to handle |
| 510 | * |
| 511 | * If PCI Express port service driver is registered with |
| 512 | * pcie_port_service_register(), this function will be called by the driver core |
| 513 | * when device_unregister() is called for the port service device associated |
| 514 | * with the driver. |
| 515 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 516 | static int pcie_port_remove_service(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 518 | struct pcie_device *pciedev; |
| 519 | struct pcie_port_service_driver *driver; |
| 520 | |
| 521 | if (!dev || !dev->driver) |
| 522 | return 0; |
| 523 | |
| 524 | pciedev = to_pcie_device(dev); |
| 525 | driver = to_service_driver(dev->driver); |
| 526 | if (driver && driver->remove) { |
| 527 | dev_printk(KERN_DEBUG, dev, "unloading service driver %s\n", |
| 528 | driver->name); |
| 529 | driver->remove(pciedev); |
| 530 | put_device(dev); |
| 531 | } |
| 532 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | } |
| 534 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 535 | /** |
| 536 | * pcie_port_shutdown_service - shut down given PCI Express port service |
| 537 | * @dev: PCI Express port service device to handle |
| 538 | * |
| 539 | * If PCI Express port service driver is registered with |
| 540 | * pcie_port_service_register(), this function will be called by the driver core |
| 541 | * when device_shutdown() is called for the port service device associated |
| 542 | * with the driver. |
| 543 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 544 | static void pcie_port_shutdown_service(struct device *dev) {} |
| 545 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 546 | /** |
| 547 | * pcie_port_service_register - register PCI Express port service driver |
| 548 | * @new: PCI Express port service driver to register |
| 549 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | int pcie_port_service_register(struct pcie_port_service_driver *new) |
| 551 | { |
Rafael J. Wysocki | 79dd918 | 2010-08-21 01:51:44 +0200 | [diff] [blame] | 552 | if (pcie_ports_disabled) |
| 553 | return -ENODEV; |
| 554 | |
Geert Uytterhoeven | 6f825b7 | 2013-11-12 20:07:17 +0100 | [diff] [blame] | 555 | new->driver.name = new->name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | new->driver.bus = &pcie_port_bus_type; |
| 557 | new->driver.probe = pcie_port_probe_service; |
| 558 | new->driver.remove = pcie_port_remove_service; |
| 559 | new->driver.shutdown = pcie_port_shutdown_service; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
| 561 | return driver_register(&new->driver); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 562 | } |
Hidetoshi Seto | 40da418 | 2009-12-15 11:38:04 +0900 | [diff] [blame] | 563 | EXPORT_SYMBOL(pcie_port_service_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 565 | /** |
| 566 | * pcie_port_service_unregister - unregister PCI Express port service driver |
| 567 | * @drv: PCI Express port service driver to unregister |
| 568 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 569 | void pcie_port_service_unregister(struct pcie_port_service_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 571 | driver_unregister(&drv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | EXPORT_SYMBOL(pcie_port_service_unregister); |