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> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 14 | #include <linux/string.h> |
| 15 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/pcieport_if.h> |
Rafael J. Wysocki | 28eb5f2 | 2010-08-21 22:02:38 +0200 | [diff] [blame] | 17 | #include <linux/aer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
Rafael J. Wysocki | 1bf83e55 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 19 | #include "../pci.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "portdrv.h" |
| 21 | |
MUNEDA Takahiro | 7570a33 | 2012-02-02 11:09:22 -0500 | [diff] [blame] | 22 | bool pciehp_msi_disabled; |
| 23 | |
| 24 | static int __init pciehp_setup(char *str) |
| 25 | { |
| 26 | if (!strncmp(str, "nomsi", 5)) |
| 27 | pciehp_msi_disabled = true; |
| 28 | |
| 29 | return 1; |
| 30 | } |
| 31 | __setup("pcie_hp=", pciehp_setup); |
| 32 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 33 | /** |
| 34 | * release_pcie_device - free PCI Express port service device structure |
| 35 | * @dev: Port service device to release |
| 36 | * |
| 37 | * Invoked automatically when device is being removed in response to |
| 38 | * device_unregister(dev). Release all resources being claimed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | */ |
| 40 | static void release_pcie_device(struct device *dev) |
| 41 | { |
Hidetoshi Seto | 40da418 | 2009-12-15 11:38:04 +0900 | [diff] [blame] | 42 | kfree(to_pcie_device(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | } |
| 44 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 45 | /** |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 46 | * pcie_port_msix_add_entry - add entry to given array of MSI-X entries |
| 47 | * @entries: Array of MSI-X entries |
| 48 | * @new_entry: Index of the entry to add to the array |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 49 | * @nr_entries: Number of entries already in the array |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 50 | * |
| 51 | * Return value: Position of the added entry in the array |
| 52 | */ |
| 53 | static int pcie_port_msix_add_entry( |
| 54 | struct msix_entry *entries, int new_entry, int nr_entries) |
| 55 | { |
| 56 | int j; |
| 57 | |
| 58 | for (j = 0; j < nr_entries; j++) |
| 59 | if (entries[j].entry == new_entry) |
| 60 | return j; |
| 61 | |
| 62 | entries[j].entry = new_entry; |
| 63 | return j; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * pcie_port_enable_msix - try to set up MSI-X as interrupt mode for given port |
| 68 | * @dev: PCI Express port to handle |
| 69 | * @vectors: Array of interrupt vectors to populate |
| 70 | * @mask: Bitmask of port capabilities returned by get_port_device_capability() |
| 71 | * |
| 72 | * Return value: 0 on success, error code on failure |
| 73 | */ |
| 74 | static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask) |
| 75 | { |
| 76 | struct msix_entry *msix_entries; |
| 77 | int idx[PCIE_PORT_DEVICE_MAXSERVICES]; |
| 78 | int nr_entries, status, pos, i, nvec; |
| 79 | u16 reg16; |
| 80 | u32 reg32; |
| 81 | |
Alexander Gordeev | ff1aa43 | 2013-12-30 08:28:15 +0100 | [diff] [blame] | 82 | nr_entries = pci_msix_vec_count(dev); |
| 83 | if (nr_entries < 0) |
| 84 | return nr_entries; |
| 85 | BUG_ON(!nr_entries); |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 86 | if (nr_entries > PCIE_PORT_MAX_MSIX_ENTRIES) |
| 87 | nr_entries = PCIE_PORT_MAX_MSIX_ENTRIES; |
| 88 | |
| 89 | msix_entries = kzalloc(sizeof(*msix_entries) * nr_entries, GFP_KERNEL); |
| 90 | if (!msix_entries) |
| 91 | return -ENOMEM; |
| 92 | |
| 93 | /* |
| 94 | * Allocate as many entries as the port wants, so that we can check |
| 95 | * which of them will be useful. Moreover, if nr_entries is correctly |
| 96 | * equal to the number of entries this port actually uses, we'll happily |
| 97 | * go through without any tricks. |
| 98 | */ |
| 99 | for (i = 0; i < nr_entries; i++) |
| 100 | msix_entries[i].entry = i; |
| 101 | |
Alexander Gordeev | 9ada07b | 2014-03-06 21:11:22 +0100 | [diff] [blame^] | 102 | status = pci_enable_msix_exact(dev, msix_entries, nr_entries); |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 103 | if (status) |
| 104 | goto Exit; |
| 105 | |
| 106 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
| 107 | idx[i] = -1; |
| 108 | status = -EIO; |
| 109 | nvec = 0; |
| 110 | |
| 111 | if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) { |
| 112 | int entry; |
| 113 | |
| 114 | /* |
| 115 | * The code below follows the PCI Express Base Specification 2.0 |
| 116 | * stating in Section 6.1.6 that "PME and Hot-Plug Event |
| 117 | * interrupts (when both are implemented) always share the same |
| 118 | * MSI or MSI-X vector, as indicated by the Interrupt Message |
| 119 | * Number field in the PCI Express Capabilities register", where |
| 120 | * according to Section 7.8.2 of the specification "For MSI-X, |
| 121 | * the value in this field indicates which MSI-X Table entry is |
| 122 | * used to generate the interrupt message." |
| 123 | */ |
Bjorn Helgaas | 33e8b34fd | 2012-12-05 13:51:18 -0700 | [diff] [blame] | 124 | pcie_capability_read_word(dev, PCI_EXP_FLAGS, ®16); |
Kenji Kaneshige | f9f4560 | 2009-11-25 21:06:51 +0900 | [diff] [blame] | 125 | entry = (reg16 & PCI_EXP_FLAGS_IRQ) >> 9; |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 126 | if (entry >= nr_entries) |
| 127 | goto Error; |
| 128 | |
| 129 | i = pcie_port_msix_add_entry(msix_entries, entry, nvec); |
| 130 | if (i == nvec) |
| 131 | nvec++; |
| 132 | |
| 133 | idx[PCIE_PORT_SERVICE_PME_SHIFT] = i; |
| 134 | idx[PCIE_PORT_SERVICE_HP_SHIFT] = i; |
| 135 | } |
| 136 | |
| 137 | if (mask & PCIE_PORT_SERVICE_AER) { |
| 138 | int entry; |
| 139 | |
| 140 | /* |
| 141 | * The code below follows Section 7.10.10 of the PCI Express |
| 142 | * Base Specification 2.0 stating that bits 31-27 of the Root |
| 143 | * Error Status Register contain a value indicating which of the |
| 144 | * MSI/MSI-X vectors assigned to the port is going to be used |
| 145 | * for AER, where "For MSI-X, the value in this register |
| 146 | * indicates which MSI-X Table entry is used to generate the |
| 147 | * interrupt message." |
| 148 | */ |
| 149 | pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR); |
| 150 | pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, ®32); |
| 151 | entry = reg32 >> 27; |
| 152 | if (entry >= nr_entries) |
| 153 | goto Error; |
| 154 | |
| 155 | i = pcie_port_msix_add_entry(msix_entries, entry, nvec); |
| 156 | if (i == nvec) |
| 157 | nvec++; |
| 158 | |
| 159 | idx[PCIE_PORT_SERVICE_AER_SHIFT] = i; |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | * If nvec is equal to the allocated number of entries, we can just use |
| 164 | * what we have. Otherwise, the port has some extra entries not for the |
| 165 | * services we know and we need to work around that. |
| 166 | */ |
| 167 | if (nvec == nr_entries) { |
| 168 | status = 0; |
| 169 | } else { |
| 170 | /* Drop the temporary MSI-X setup */ |
| 171 | pci_disable_msix(dev); |
| 172 | |
| 173 | /* Now allocate the MSI-X vectors for real */ |
Alexander Gordeev | 9ada07b | 2014-03-06 21:11:22 +0100 | [diff] [blame^] | 174 | status = pci_enable_msix_exact(dev, msix_entries, nvec); |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 175 | if (status) |
| 176 | goto Exit; |
| 177 | } |
| 178 | |
| 179 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
| 180 | vectors[i] = idx[i] >= 0 ? msix_entries[idx[i]].vector : -1; |
| 181 | |
| 182 | Exit: |
| 183 | kfree(msix_entries); |
| 184 | return status; |
| 185 | |
| 186 | Error: |
| 187 | pci_disable_msix(dev); |
| 188 | goto Exit; |
| 189 | } |
| 190 | |
| 191 | /** |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 192 | * init_service_irqs - initialize irqs for PCI Express port services |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 193 | * @dev: PCI Express port to handle |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 194 | * @irqs: Array of irqs to populate |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 195 | * @mask: Bitmask of port capabilities returned by get_port_device_capability() |
| 196 | * |
| 197 | * Return value: Interrupt mode associated with the port |
| 198 | */ |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 199 | 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] | 200 | { |
Rafael J. Wysocki | c39fae1 | 2010-02-17 23:40:07 +0100 | [diff] [blame] | 201 | int i, irq = -1; |
| 202 | |
Shengzhou Liu | e237d83 | 2012-07-18 14:06:54 +0800 | [diff] [blame] | 203 | /* |
| 204 | * If MSI cannot be used for PCIe PME or hotplug, we have to use |
| 205 | * INTx or other interrupts, e.g. system shared interrupt. |
| 206 | */ |
MUNEDA Takahiro | 7570a33 | 2012-02-02 11:09:22 -0500 | [diff] [blame] | 207 | if (((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) || |
| 208 | ((mask & PCIE_PORT_SERVICE_HP) && pciehp_no_msi())) { |
Shengzhou Liu | e237d83 | 2012-07-18 14:06:54 +0800 | [diff] [blame] | 209 | if (dev->irq) |
Rafael J. Wysocki | c39fae1 | 2010-02-17 23:40:07 +0100 | [diff] [blame] | 210 | irq = dev->irq; |
| 211 | goto no_msi; |
| 212 | } |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 213 | |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 214 | /* Try to use MSI-X if supported */ |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 215 | if (!pcie_port_enable_msix(dev, irqs, mask)) |
| 216 | return 0; |
Rafael J. Wysocki | c39fae1 | 2010-02-17 23:40:07 +0100 | [diff] [blame] | 217 | |
Shengzhou Liu | e237d83 | 2012-07-18 14:06:54 +0800 | [diff] [blame] | 218 | /* |
| 219 | * We're not going to use MSI-X, so try MSI and fall back to INTx. |
| 220 | * If neither MSI/MSI-X nor INTx available, try other interrupt. On |
| 221 | * some platforms, root port doesn't support MSI/MSI-X/INTx in RC mode. |
| 222 | */ |
| 223 | if (!pci_enable_msi(dev) || dev->irq) |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 224 | irq = dev->irq; |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 225 | |
Rafael J. Wysocki | c39fae1 | 2010-02-17 23:40:07 +0100 | [diff] [blame] | 226 | no_msi: |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 227 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 228 | irqs[i] = irq; |
| 229 | irqs[PCIE_PORT_SERVICE_VC_SHIFT] = -1; |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 230 | |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 231 | if (irq < 0) |
| 232 | return -ENODEV; |
| 233 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | } |
| 235 | |
Kenji Kaneshige | fbb5de7 | 2009-11-25 21:05:01 +0900 | [diff] [blame] | 236 | static void cleanup_service_irqs(struct pci_dev *dev) |
| 237 | { |
| 238 | if (dev->msix_enabled) |
| 239 | pci_disable_msix(dev); |
| 240 | else if (dev->msi_enabled) |
| 241 | pci_disable_msi(dev); |
| 242 | } |
| 243 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 244 | /** |
| 245 | * get_port_device_capability - discover capabilities of a PCI Express port |
| 246 | * @dev: PCI Express port to examine |
| 247 | * |
| 248 | * The capabilities are read from the port's PCI Express configuration registers |
| 249 | * as described in PCI Express Base Specification 1.0a sections 7.8.2, 7.8.9 and |
| 250 | * 7.9 - 7.11. |
| 251 | * |
| 252 | * Return value: Bitmask of discovered port capabilities |
| 253 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | static int get_port_device_capability(struct pci_dev *dev) |
| 255 | { |
Jiang Liu | 2dcfaf8 | 2012-07-24 17:20:08 +0800 | [diff] [blame] | 256 | int services = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | u32 reg32; |
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 | int err; |
| 260 | |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 261 | if (pcie_ports_disabled) |
| 262 | return 0; |
| 263 | |
Andrew Murray | 6b87e70 | 2013-10-26 18:23:25 +0100 | [diff] [blame] | 264 | cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP |
| 265 | | PCIE_PORT_SERVICE_VC; |
| 266 | if (pci_aer_available()) |
| 267 | cap_mask |= PCIE_PORT_SERVICE_AER; |
| 268 | |
| 269 | if (pcie_ports_auto) { |
| 270 | err = pcie_port_platform_notify(dev, &cap_mask); |
| 271 | if (err) |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 272 | return 0; |
Rafael J. Wysocki | 28eb5f2 | 2010-08-21 22:02:38 +0200 | [diff] [blame] | 273 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | /* Hot-Plug Capable */ |
Taku Izumi | ff8e59b | 2012-10-31 09:51:48 +0900 | [diff] [blame] | 276 | if ((cap_mask & PCIE_PORT_SERVICE_HP) && |
Myron Stowe | 1c531d8 | 2013-01-25 17:55:45 -0700 | [diff] [blame] | 277 | pcie_caps_reg(dev) & PCI_EXP_FLAGS_SLOT) { |
Jiang Liu | 2dcfaf8 | 2012-07-24 17:20:08 +0800 | [diff] [blame] | 278 | pcie_capability_read_dword(dev, PCI_EXP_SLTCAP, ®32); |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 279 | if (reg32 & PCI_EXP_SLTCAP_HPC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | services |= PCIE_PORT_SERVICE_HP; |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 281 | /* |
| 282 | * Disable hot-plug interrupts in case they have been |
| 283 | * enabled by the BIOS and the hot-plug service driver |
| 284 | * is not loaded. |
| 285 | */ |
Jiang Liu | 2dcfaf8 | 2012-07-24 17:20:08 +0800 | [diff] [blame] | 286 | pcie_capability_clear_word(dev, PCI_EXP_SLTCTL, |
| 287 | PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE); |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 288 | } |
Rafael J. Wysocki | 1bf83e55 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 289 | } |
| 290 | /* AER capable */ |
Rafael J. Wysocki | 28eb5f2 | 2010-08-21 22:02:38 +0200 | [diff] [blame] | 291 | if ((cap_mask & PCIE_PORT_SERVICE_AER) |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 292 | && pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) { |
Jesse Barnes | 0927678 | 2008-10-18 17:33:19 -0700 | [diff] [blame] | 293 | services |= PCIE_PORT_SERVICE_AER; |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 294 | /* |
| 295 | * Disable AER on this port in case it's been enabled by the |
| 296 | * BIOS (the AER service driver will enable it when necessary). |
| 297 | */ |
| 298 | pci_disable_pcie_error_reporting(dev); |
| 299 | } |
Rafael J. Wysocki | 1bf83e55 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 300 | /* VC support */ |
Jesse Barnes | 0927678 | 2008-10-18 17:33:19 -0700 | [diff] [blame] | 301 | if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC)) |
| 302 | services |= PCIE_PORT_SERVICE_VC; |
Kenji Kaneshige | 9e5d0b1 | 2009-11-25 21:02:51 +0900 | [diff] [blame] | 303 | /* Root ports are capable of generating PME too */ |
Rafael J. Wysocki | 28eb5f2 | 2010-08-21 22:02:38 +0200 | [diff] [blame] | 304 | if ((cap_mask & PCIE_PORT_SERVICE_PME) |
Yijing Wang | 62f87c0 | 2012-07-24 17:20:03 +0800 | [diff] [blame] | 305 | && pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) { |
Kenji Kaneshige | 9e5d0b1 | 2009-11-25 21:02:51 +0900 | [diff] [blame] | 306 | services |= PCIE_PORT_SERVICE_PME; |
Rafael J. Wysocki | 2bd50dd | 2010-08-21 01:57:39 +0200 | [diff] [blame] | 307 | /* |
| 308 | * Disable PME interrupt on this port in case it's been enabled |
| 309 | * by the BIOS (the PME service driver will enable it when |
| 310 | * necessary). |
| 311 | */ |
| 312 | pcie_pme_interrupt_enable(dev, false); |
| 313 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
| 315 | return services; |
| 316 | } |
| 317 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 318 | /** |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 319 | * pcie_device_init - allocate and initialize PCI Express port service device |
| 320 | * @pdev: PCI Express port to associate the service device with |
| 321 | * @service: Type of service to associate with the service device |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 322 | * @irq: Interrupt vector to associate with the service device |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 323 | */ |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 324 | 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] | 325 | { |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 326 | int retval; |
| 327 | struct pcie_device *pcie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | struct device *device; |
| 329 | |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 330 | pcie = kzalloc(sizeof(*pcie), GFP_KERNEL); |
| 331 | if (!pcie) |
| 332 | return -ENOMEM; |
| 333 | pcie->port = pdev; |
| 334 | pcie->irq = irq; |
| 335 | pcie->service = service; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | /* Initialize generic device interface */ |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 338 | device = &pcie->device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | device->bus = &pcie_port_bus_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | device->release = release_pcie_device; /* callback to free pcie dev */ |
Kay Sievers | 1a92713 | 2008-10-30 02:17:49 +0100 | [diff] [blame] | 341 | dev_set_name(device, "%s:pcie%02x", |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 342 | pci_name(pdev), |
Yijing Wang | 62f87c0 | 2012-07-24 17:20:03 +0800 | [diff] [blame] | 343 | get_descriptor_id(pci_pcie_type(pdev), service)); |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 344 | device->parent = &pdev->dev; |
Rafael J. Wysocki | a1e4d72 | 2010-02-08 19:16:33 +0100 | [diff] [blame] | 345 | device_enable_async_suspend(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
Kenji Kaneshige | 52a0f24 | 2009-11-25 21:01:28 +0900 | [diff] [blame] | 347 | retval = device_register(device); |
Bjorn Helgaas | 8f3acca | 2013-12-19 14:20:09 -0700 | [diff] [blame] | 348 | if (retval) { |
Levente Kurusa | f398620 | 2013-12-19 14:22:35 -0700 | [diff] [blame] | 349 | put_device(device); |
Bjorn Helgaas | 8f3acca | 2013-12-19 14:20:09 -0700 | [diff] [blame] | 350 | return retval; |
| 351 | } |
| 352 | |
Bjorn Helgaas | 8f3acca | 2013-12-19 14:20:09 -0700 | [diff] [blame] | 353 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 356 | /** |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 357 | * pcie_port_device_register - register PCI Express port |
| 358 | * @dev: PCI Express port to register |
| 359 | * |
| 360 | * Allocate the port extension structure and register services associated with |
| 361 | * the port. |
| 362 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | int pcie_port_device_register(struct pci_dev *dev) |
| 364 | { |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 365 | int status, capabilities, i, nr_service; |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 366 | int irqs[PCIE_PORT_DEVICE_MAXSERVICES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Kenji Kaneshige | 1ce5e83 | 2009-11-25 21:04:30 +0900 | [diff] [blame] | 368 | /* Enable PCI Express port device */ |
| 369 | status = pci_enable_device(dev); |
| 370 | if (status) |
Kenji Kaneshige | 694f88e | 2009-11-25 21:06:15 +0900 | [diff] [blame] | 371 | return status; |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 372 | |
| 373 | /* Get and check PCI Express port services */ |
| 374 | capabilities = get_port_device_capability(dev); |
Naga Chumbalkar | eca6731 | 2011-03-21 03:29:20 +0000 | [diff] [blame] | 375 | if (!capabilities) |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 376 | return 0; |
Rafael J. Wysocki | fe31e69 | 2010-12-19 15:57:16 +0100 | [diff] [blame] | 377 | |
Kenji Kaneshige | 1ce5e83 | 2009-11-25 21:04:30 +0900 | [diff] [blame] | 378 | pci_set_master(dev); |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 379 | /* |
| 380 | * Initialize service irqs. Don't use service devices that |
| 381 | * require interrupts if there is no way to generate them. |
| 382 | */ |
| 383 | status = init_service_irqs(dev, irqs, capabilities); |
| 384 | if (status) { |
| 385 | capabilities &= PCIE_PORT_SERVICE_VC; |
| 386 | if (!capabilities) |
Kenji Kaneshige | 1ce5e83 | 2009-11-25 21:04:30 +0900 | [diff] [blame] | 387 | goto error_disable; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 388 | } |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 389 | |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 390 | /* Allocate child services if any */ |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 391 | status = -ENODEV; |
| 392 | nr_service = 0; |
| 393 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) { |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 394 | int service = 1 << i; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 395 | if (!(capabilities & service)) |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 396 | continue; |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 397 | if (!pcie_device_init(dev, service, irqs[i])) |
| 398 | nr_service++; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 399 | } |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 400 | if (!nr_service) |
Kenji Kaneshige | fbb5de7 | 2009-11-25 21:05:01 +0900 | [diff] [blame] | 401 | goto error_cleanup_irqs; |
Kenji Kaneshige | 40717c3 | 2009-11-25 21:05:35 +0900 | [diff] [blame] | 402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | return 0; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 404 | |
Kenji Kaneshige | fbb5de7 | 2009-11-25 21:05:01 +0900 | [diff] [blame] | 405 | error_cleanup_irqs: |
| 406 | cleanup_service_irqs(dev); |
Kenji Kaneshige | 1ce5e83 | 2009-11-25 21:04:30 +0900 | [diff] [blame] | 407 | error_disable: |
| 408 | pci_disable_device(dev); |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 409 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
| 411 | |
| 412 | #ifdef CONFIG_PM |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 413 | static int suspend_iter(struct device *dev, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | struct pcie_port_service_driver *service_driver; |
| 416 | |
Hidetoshi Seto | 40da418 | 2009-12-15 11:38:04 +0900 | [diff] [blame] | 417 | if ((dev->bus == &pcie_port_bus_type) && dev->driver) { |
| 418 | service_driver = to_service_driver(dev->driver); |
| 419 | if (service_driver->suspend) |
| 420 | service_driver->suspend(to_pcie_device(dev)); |
| 421 | } |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 422 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | } |
| 424 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 425 | /** |
| 426 | * pcie_port_device_suspend - suspend port services associated with a PCIe port |
| 427 | * @dev: PCI Express port to handle |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 428 | */ |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 429 | int pcie_port_device_suspend(struct device *dev) |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 430 | { |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 431 | return device_for_each_child(dev, NULL, suspend_iter); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | static int resume_iter(struct device *dev, void *data) |
| 435 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | struct pcie_port_service_driver *service_driver; |
| 437 | |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 438 | if ((dev->bus == &pcie_port_bus_type) && |
| 439 | (dev->driver)) { |
| 440 | service_driver = to_service_driver(dev->driver); |
| 441 | if (service_driver->resume) |
| 442 | service_driver->resume(to_pcie_device(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | } |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 444 | return 0; |
| 445 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 447 | /** |
| 448 | * pcie_port_device_suspend - resume port services associated with a PCIe port |
| 449 | * @dev: PCI Express port to handle |
| 450 | */ |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 451 | int pcie_port_device_resume(struct device *dev) |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 452 | { |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 453 | return device_for_each_child(dev, NULL, resume_iter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 455 | #endif /* PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 457 | static int remove_iter(struct device *dev, void *data) |
| 458 | { |
Bjorn Helgaas | e75f34c | 2013-12-19 14:24:13 -0700 | [diff] [blame] | 459 | if (dev->bus == &pcie_port_bus_type) |
Eric W. Biederman | ae40582 | 2009-02-20 20:16:07 -0800 | [diff] [blame] | 460 | device_unregister(dev); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 461 | return 0; |
| 462 | } |
| 463 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 464 | /** |
| 465 | * pcie_port_device_remove - unregister PCI Express port service devices |
| 466 | * @dev: PCI Express port the service devices to unregister are associated with |
| 467 | * |
| 468 | * Remove PCI Express port service devices associated with given port and |
| 469 | * disable MSI-X or MSI for the port. |
| 470 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | void pcie_port_device_remove(struct pci_dev *dev) |
| 472 | { |
Eric W. Biederman | ae40582 | 2009-02-20 20:16:07 -0800 | [diff] [blame] | 473 | device_for_each_child(&dev->dev, NULL, remove_iter); |
Kenji Kaneshige | fbb5de7 | 2009-11-25 21:05:01 +0900 | [diff] [blame] | 474 | cleanup_service_irqs(dev); |
Kenji Kaneshige | dc53517 | 2009-11-25 21:04:00 +0900 | [diff] [blame] | 475 | pci_disable_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |
| 477 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 478 | /** |
| 479 | * pcie_port_probe_service - probe driver for given PCI Express port service |
| 480 | * @dev: PCI Express port service device to probe against |
| 481 | * |
| 482 | * If PCI Express port service driver is registered with |
| 483 | * pcie_port_service_register(), this function will be called by the driver core |
| 484 | * whenever match is found between the driver and a port service device. |
| 485 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 486 | static int pcie_port_probe_service(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 488 | struct pcie_device *pciedev; |
| 489 | struct pcie_port_service_driver *driver; |
| 490 | int status; |
| 491 | |
| 492 | if (!dev || !dev->driver) |
| 493 | return -ENODEV; |
| 494 | |
| 495 | driver = to_service_driver(dev->driver); |
| 496 | if (!driver || !driver->probe) |
| 497 | return -ENODEV; |
| 498 | |
| 499 | pciedev = to_pcie_device(dev); |
Rafael J. Wysocki | 0516c8b | 2009-01-13 14:44:19 +0100 | [diff] [blame] | 500 | status = driver->probe(pciedev); |
Bjorn Helgaas | 8f3acca | 2013-12-19 14:20:09 -0700 | [diff] [blame] | 501 | if (status) |
| 502 | return status; |
| 503 | |
| 504 | dev_printk(KERN_DEBUG, dev, "service driver %s loaded\n", driver->name); |
| 505 | get_device(dev); |
| 506 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | } |
| 508 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 509 | /** |
| 510 | * pcie_port_remove_service - detach driver from given PCI Express port service |
| 511 | * @dev: PCI Express port service device to handle |
| 512 | * |
| 513 | * If PCI Express port service driver is registered with |
| 514 | * pcie_port_service_register(), this function will be called by the driver core |
| 515 | * when device_unregister() is called for the port service device associated |
| 516 | * with the driver. |
| 517 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 518 | static int pcie_port_remove_service(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 520 | struct pcie_device *pciedev; |
| 521 | struct pcie_port_service_driver *driver; |
| 522 | |
| 523 | if (!dev || !dev->driver) |
| 524 | return 0; |
| 525 | |
| 526 | pciedev = to_pcie_device(dev); |
| 527 | driver = to_service_driver(dev->driver); |
| 528 | if (driver && driver->remove) { |
| 529 | dev_printk(KERN_DEBUG, dev, "unloading service driver %s\n", |
| 530 | driver->name); |
| 531 | driver->remove(pciedev); |
| 532 | put_device(dev); |
| 533 | } |
| 534 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
| 536 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 537 | /** |
| 538 | * pcie_port_shutdown_service - shut down given PCI Express port service |
| 539 | * @dev: PCI Express port service device to handle |
| 540 | * |
| 541 | * If PCI Express port service driver is registered with |
| 542 | * pcie_port_service_register(), this function will be called by the driver core |
| 543 | * when device_shutdown() is called for the port service device associated |
| 544 | * with the driver. |
| 545 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 546 | static void pcie_port_shutdown_service(struct device *dev) {} |
| 547 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 548 | /** |
| 549 | * pcie_port_service_register - register PCI Express port service driver |
| 550 | * @new: PCI Express port service driver to register |
| 551 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | int pcie_port_service_register(struct pcie_port_service_driver *new) |
| 553 | { |
Rafael J. Wysocki | 79dd918 | 2010-08-21 01:51:44 +0200 | [diff] [blame] | 554 | if (pcie_ports_disabled) |
| 555 | return -ENODEV; |
| 556 | |
Geert Uytterhoeven | 6f825b7 | 2013-11-12 20:07:17 +0100 | [diff] [blame] | 557 | new->driver.name = new->name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | new->driver.bus = &pcie_port_bus_type; |
| 559 | new->driver.probe = pcie_port_probe_service; |
| 560 | new->driver.remove = pcie_port_remove_service; |
| 561 | new->driver.shutdown = pcie_port_shutdown_service; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
| 563 | return driver_register(&new->driver); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 564 | } |
Hidetoshi Seto | 40da418 | 2009-12-15 11:38:04 +0900 | [diff] [blame] | 565 | EXPORT_SYMBOL(pcie_port_service_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 567 | /** |
| 568 | * pcie_port_service_unregister - unregister PCI Express port service driver |
| 569 | * @drv: PCI Express port service driver to unregister |
| 570 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 571 | void pcie_port_service_unregister(struct pcie_port_service_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 573 | driver_unregister(&drv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | EXPORT_SYMBOL(pcie_port_service_unregister); |