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> |
| 17 | |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 18 | #include "../pci.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include "portdrv.h" |
| 20 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 21 | /** |
| 22 | * release_pcie_device - free PCI Express port service device structure |
| 23 | * @dev: Port service device to release |
| 24 | * |
| 25 | * Invoked automatically when device is being removed in response to |
| 26 | * device_unregister(dev). Release all resources being claimed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | */ |
| 28 | static void release_pcie_device(struct device *dev) |
| 29 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | kfree(to_pcie_device(dev)); |
| 31 | } |
| 32 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 33 | /** |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 34 | * pcie_port_msix_add_entry - add entry to given array of MSI-X entries |
| 35 | * @entries: Array of MSI-X entries |
| 36 | * @new_entry: Index of the entry to add to the array |
| 37 | * @nr_entries: Number of entries aleady in the array |
| 38 | * |
| 39 | * Return value: Position of the added entry in the array |
| 40 | */ |
| 41 | static int pcie_port_msix_add_entry( |
| 42 | struct msix_entry *entries, int new_entry, int nr_entries) |
| 43 | { |
| 44 | int j; |
| 45 | |
| 46 | for (j = 0; j < nr_entries; j++) |
| 47 | if (entries[j].entry == new_entry) |
| 48 | return j; |
| 49 | |
| 50 | entries[j].entry = new_entry; |
| 51 | return j; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * pcie_port_enable_msix - try to set up MSI-X as interrupt mode for given port |
| 56 | * @dev: PCI Express port to handle |
| 57 | * @vectors: Array of interrupt vectors to populate |
| 58 | * @mask: Bitmask of port capabilities returned by get_port_device_capability() |
| 59 | * |
| 60 | * Return value: 0 on success, error code on failure |
| 61 | */ |
| 62 | static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask) |
| 63 | { |
| 64 | struct msix_entry *msix_entries; |
| 65 | int idx[PCIE_PORT_DEVICE_MAXSERVICES]; |
| 66 | int nr_entries, status, pos, i, nvec; |
| 67 | u16 reg16; |
| 68 | u32 reg32; |
| 69 | |
| 70 | nr_entries = pci_msix_table_size(dev); |
| 71 | if (!nr_entries) |
| 72 | return -EINVAL; |
| 73 | if (nr_entries > PCIE_PORT_MAX_MSIX_ENTRIES) |
| 74 | nr_entries = PCIE_PORT_MAX_MSIX_ENTRIES; |
| 75 | |
| 76 | msix_entries = kzalloc(sizeof(*msix_entries) * nr_entries, GFP_KERNEL); |
| 77 | if (!msix_entries) |
| 78 | return -ENOMEM; |
| 79 | |
| 80 | /* |
| 81 | * Allocate as many entries as the port wants, so that we can check |
| 82 | * which of them will be useful. Moreover, if nr_entries is correctly |
| 83 | * equal to the number of entries this port actually uses, we'll happily |
| 84 | * go through without any tricks. |
| 85 | */ |
| 86 | for (i = 0; i < nr_entries; i++) |
| 87 | msix_entries[i].entry = i; |
| 88 | |
| 89 | status = pci_enable_msix(dev, msix_entries, nr_entries); |
| 90 | if (status) |
| 91 | goto Exit; |
| 92 | |
| 93 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
| 94 | idx[i] = -1; |
| 95 | status = -EIO; |
| 96 | nvec = 0; |
| 97 | |
| 98 | if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) { |
| 99 | int entry; |
| 100 | |
| 101 | /* |
| 102 | * The code below follows the PCI Express Base Specification 2.0 |
| 103 | * stating in Section 6.1.6 that "PME and Hot-Plug Event |
| 104 | * interrupts (when both are implemented) always share the same |
| 105 | * MSI or MSI-X vector, as indicated by the Interrupt Message |
| 106 | * Number field in the PCI Express Capabilities register", where |
| 107 | * according to Section 7.8.2 of the specification "For MSI-X, |
| 108 | * the value in this field indicates which MSI-X Table entry is |
| 109 | * used to generate the interrupt message." |
| 110 | */ |
Kenji Kaneshige | dba90df | 2009-11-11 14:32:42 +0900 | [diff] [blame^] | 111 | pos = pci_pcie_cap(dev); |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 112 | pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, ®16); |
| 113 | entry = (reg16 >> 9) & PCIE_PORT_MSI_VECTOR_MASK; |
| 114 | if (entry >= nr_entries) |
| 115 | goto Error; |
| 116 | |
| 117 | i = pcie_port_msix_add_entry(msix_entries, entry, nvec); |
| 118 | if (i == nvec) |
| 119 | nvec++; |
| 120 | |
| 121 | idx[PCIE_PORT_SERVICE_PME_SHIFT] = i; |
| 122 | idx[PCIE_PORT_SERVICE_HP_SHIFT] = i; |
| 123 | } |
| 124 | |
| 125 | if (mask & PCIE_PORT_SERVICE_AER) { |
| 126 | int entry; |
| 127 | |
| 128 | /* |
| 129 | * The code below follows Section 7.10.10 of the PCI Express |
| 130 | * Base Specification 2.0 stating that bits 31-27 of the Root |
| 131 | * Error Status Register contain a value indicating which of the |
| 132 | * MSI/MSI-X vectors assigned to the port is going to be used |
| 133 | * for AER, where "For MSI-X, the value in this register |
| 134 | * indicates which MSI-X Table entry is used to generate the |
| 135 | * interrupt message." |
| 136 | */ |
| 137 | pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR); |
| 138 | pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, ®32); |
| 139 | entry = reg32 >> 27; |
| 140 | if (entry >= nr_entries) |
| 141 | goto Error; |
| 142 | |
| 143 | i = pcie_port_msix_add_entry(msix_entries, entry, nvec); |
| 144 | if (i == nvec) |
| 145 | nvec++; |
| 146 | |
| 147 | idx[PCIE_PORT_SERVICE_AER_SHIFT] = i; |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * If nvec is equal to the allocated number of entries, we can just use |
| 152 | * what we have. Otherwise, the port has some extra entries not for the |
| 153 | * services we know and we need to work around that. |
| 154 | */ |
| 155 | if (nvec == nr_entries) { |
| 156 | status = 0; |
| 157 | } else { |
| 158 | /* Drop the temporary MSI-X setup */ |
| 159 | pci_disable_msix(dev); |
| 160 | |
| 161 | /* Now allocate the MSI-X vectors for real */ |
| 162 | status = pci_enable_msix(dev, msix_entries, nvec); |
| 163 | if (status) |
| 164 | goto Exit; |
| 165 | } |
| 166 | |
| 167 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
| 168 | vectors[i] = idx[i] >= 0 ? msix_entries[idx[i]].vector : -1; |
| 169 | |
| 170 | Exit: |
| 171 | kfree(msix_entries); |
| 172 | return status; |
| 173 | |
| 174 | Error: |
| 175 | pci_disable_msix(dev); |
| 176 | goto Exit; |
| 177 | } |
| 178 | |
| 179 | /** |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 180 | * assign_interrupt_mode - choose interrupt mode for PCI Express port services |
| 181 | * (INTx, MSI-X, MSI) and set up vectors |
| 182 | * @dev: PCI Express port to handle |
| 183 | * @vectors: Array of interrupt vectors to populate |
| 184 | * @mask: Bitmask of port capabilities returned by get_port_device_capability() |
| 185 | * |
| 186 | * Return value: Interrupt mode associated with the port |
| 187 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask) |
| 189 | { |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 190 | int irq, interrupt_mode = PCIE_PORT_NO_IRQ; |
| 191 | int i; |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 192 | |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 193 | /* Try to use MSI-X if supported */ |
| 194 | if (!pcie_port_enable_msix(dev, vectors, mask)) |
| 195 | return PCIE_PORT_MSIX_MODE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 197 | /* We're not going to use MSI-X, so try MSI and fall back to INTx */ |
| 198 | if (!pci_enable_msi(dev)) |
| 199 | interrupt_mode = PCIE_PORT_MSI_MODE; |
| 200 | |
Rafael J. Wysocki | b43d451 | 2009-01-24 00:23:22 +0100 | [diff] [blame] | 201 | if (interrupt_mode == PCIE_PORT_NO_IRQ && dev->pin) |
| 202 | interrupt_mode = PCIE_PORT_INTx_MODE; |
| 203 | |
| 204 | irq = interrupt_mode != PCIE_PORT_NO_IRQ ? dev->irq : -1; |
| 205 | for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) |
| 206 | vectors[i] = irq; |
| 207 | |
| 208 | vectors[PCIE_PORT_SERVICE_VC_SHIFT] = -1; |
| 209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | return interrupt_mode; |
| 211 | } |
| 212 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 213 | /** |
| 214 | * get_port_device_capability - discover capabilities of a PCI Express port |
| 215 | * @dev: PCI Express port to examine |
| 216 | * |
| 217 | * The capabilities are read from the port's PCI Express configuration registers |
| 218 | * as described in PCI Express Base Specification 1.0a sections 7.8.2, 7.8.9 and |
| 219 | * 7.9 - 7.11. |
| 220 | * |
| 221 | * Return value: Bitmask of discovered port capabilities |
| 222 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | static int get_port_device_capability(struct pci_dev *dev) |
| 224 | { |
| 225 | int services = 0, pos; |
| 226 | u16 reg16; |
| 227 | u32 reg32; |
| 228 | |
Kenji Kaneshige | dba90df | 2009-11-11 14:32:42 +0900 | [diff] [blame^] | 229 | pos = pci_pcie_cap(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, ®16); |
| 231 | /* Hot-Plug Capable */ |
| 232 | if (reg16 & PORT_TO_SLOT_MASK) { |
| 233 | pci_read_config_dword(dev, |
| 234 | pos + PCIE_SLOT_CAPABILITIES_REG, ®32); |
| 235 | if (reg32 & SLOT_HP_CAPABLE_MASK) |
| 236 | services |= PCIE_PORT_SERVICE_HP; |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 237 | } |
| 238 | /* AER capable */ |
Jesse Barnes | 0927678 | 2008-10-18 17:33:19 -0700 | [diff] [blame] | 239 | if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) |
| 240 | services |= PCIE_PORT_SERVICE_AER; |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 241 | /* VC support */ |
Jesse Barnes | 0927678 | 2008-10-18 17:33:19 -0700 | [diff] [blame] | 242 | if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC)) |
| 243 | services |= PCIE_PORT_SERVICE_VC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | return services; |
| 246 | } |
| 247 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 248 | /** |
| 249 | * pcie_device_init - initialize PCI Express port service device |
| 250 | * @dev: Port service device to initialize |
| 251 | * @parent: PCI Express port to associate the service device with |
| 252 | * @port_type: Type of the port |
| 253 | * @service_type: Type of service to associate with the service device |
| 254 | * @irq: Interrupt vector to associate with the service device |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 255 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev, |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 257 | int service_type, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | { |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 259 | struct pcie_port_data *port_data = pci_get_drvdata(parent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | struct device *device; |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 261 | int port_type = port_data->port_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
| 263 | dev->port = parent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | dev->irq = irq; |
Rafael J. Wysocki | 2210636 | 2009-01-13 14:46:46 +0100 | [diff] [blame] | 265 | dev->service = service_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | /* Initialize generic device interface */ |
| 268 | device = &dev->device; |
| 269 | memset(device, 0, sizeof(struct device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | device->bus = &pcie_port_bus_type; |
| 271 | device->driver = NULL; |
Greg Kroah-Hartman | 8952f59 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 272 | dev_set_drvdata(device, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | device->release = release_pcie_device; /* callback to free pcie dev */ |
Kay Sievers | 1a92713 | 2008-10-30 02:17:49 +0100 | [diff] [blame] | 274 | dev_set_name(device, "%s:pcie%02x", |
Sergey Vlasov | 8c9ad50 | 2005-11-14 20:30:50 +0300 | [diff] [blame] | 275 | pci_name(parent), get_descriptor_id(port_type, service_type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | device->parent = &parent->dev; |
| 277 | } |
| 278 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 279 | /** |
| 280 | * alloc_pcie_device - allocate PCI Express port service device structure |
| 281 | * @parent: PCI Express port to associate the service device with |
| 282 | * @port_type: Type of the port |
| 283 | * @service_type: Type of service to associate with the service device |
| 284 | * @irq: Interrupt vector to associate with the service device |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 285 | */ |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 286 | static struct pcie_device* alloc_pcie_device(struct pci_dev *parent, |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 287 | int service_type, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | { |
| 289 | struct pcie_device *device; |
| 290 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 291 | device = kzalloc(sizeof(struct pcie_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | if (!device) |
| 293 | return NULL; |
| 294 | |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 295 | pcie_device_init(parent, device, service_type, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | return device; |
| 297 | } |
| 298 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 299 | /** |
| 300 | * pcie_port_device_probe - check if device is a PCI Express port |
| 301 | * @dev: Device to check |
| 302 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | int pcie_port_device_probe(struct pci_dev *dev) |
| 304 | { |
| 305 | int pos, type; |
| 306 | u16 reg; |
| 307 | |
Kenji Kaneshige | dba90df | 2009-11-11 14:32:42 +0900 | [diff] [blame^] | 308 | pos = pci_pcie_cap(dev); |
| 309 | if (!pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | return -ENODEV; |
| 311 | |
| 312 | pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, ®); |
| 313 | type = (reg >> 4) & PORT_TYPE_MASK; |
| 314 | if ( type == PCIE_RC_PORT || type == PCIE_SW_UPSTREAM_PORT || |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 315 | type == PCIE_SW_DOWNSTREAM_PORT ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | return 0; |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | return -ENODEV; |
| 319 | } |
| 320 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 321 | /** |
| 322 | * pcie_port_device_register - register PCI Express port |
| 323 | * @dev: PCI Express port to register |
| 324 | * |
| 325 | * Allocate the port extension structure and register services associated with |
| 326 | * the port. |
| 327 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | int pcie_port_device_register(struct pci_dev *dev) |
| 329 | { |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 330 | struct pcie_port_data *port_data; |
Kenji Kaneshige | dba90df | 2009-11-11 14:32:42 +0900 | [diff] [blame^] | 331 | int status, capabilities, irq_mode, i, nr_serv, pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | int vectors[PCIE_PORT_DEVICE_MAXSERVICES]; |
| 333 | u16 reg16; |
| 334 | |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 335 | port_data = kzalloc(sizeof(*port_data), GFP_KERNEL); |
| 336 | if (!port_data) |
long | 5823d10 | 2005-06-22 09:09:54 -0700 | [diff] [blame] | 337 | return -ENOMEM; |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 338 | pci_set_drvdata(dev, port_data); |
long | 5823d10 | 2005-06-22 09:09:54 -0700 | [diff] [blame] | 339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | /* Get port type */ |
Kenji Kaneshige | dba90df | 2009-11-11 14:32:42 +0900 | [diff] [blame^] | 341 | pos = pci_pcie_cap(dev); |
| 342 | pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, ®16); |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 343 | port_data->port_type = (reg16 >> 4) & PORT_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | capabilities = get_port_device_capability(dev); |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 346 | /* Root ports are capable of generating PME too */ |
| 347 | if (port_data->port_type == PCIE_RC_PORT) |
| 348 | capabilities |= PCIE_PORT_SERVICE_PME; |
| 349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | irq_mode = assign_interrupt_mode(dev, vectors, capabilities); |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 351 | if (irq_mode == PCIE_PORT_NO_IRQ) { |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 352 | /* |
| 353 | * Don't use service devices that require interrupts if there is |
| 354 | * no way to generate them. |
| 355 | */ |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 356 | if (!(capabilities & PCIE_PORT_SERVICE_VC)) { |
| 357 | status = -ENODEV; |
| 358 | goto Error; |
| 359 | } |
| 360 | capabilities = PCIE_PORT_SERVICE_VC; |
| 361 | } |
| 362 | port_data->port_irq_mode = irq_mode; |
| 363 | |
| 364 | status = pci_enable_device(dev); |
| 365 | if (status) |
| 366 | goto Error; |
| 367 | pci_set_master(dev); |
| 368 | |
| 369 | /* Allocate child services if any */ |
| 370 | for (i = 0, nr_serv = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) { |
| 371 | struct pcie_device *child; |
| 372 | int service = 1 << i; |
| 373 | |
| 374 | if (!(capabilities & service)) |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 375 | continue; |
| 376 | |
| 377 | child = alloc_pcie_device(dev, service, vectors[i]); |
| 378 | if (!child) |
| 379 | continue; |
| 380 | |
| 381 | status = device_register(&child->device); |
| 382 | if (status) { |
| 383 | kfree(child); |
| 384 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | } |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 386 | |
| 387 | get_device(&child->device); |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 388 | nr_serv++; |
| 389 | } |
| 390 | if (!nr_serv) { |
| 391 | pci_disable_device(dev); |
| 392 | status = -ENODEV; |
| 393 | goto Error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
Rafael J. Wysocki | 90e9cd5 | 2009-01-13 14:39:39 +0100 | [diff] [blame] | 395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | return 0; |
Rafael J. Wysocki | f118c0c | 2009-01-13 14:42:01 +0100 | [diff] [blame] | 397 | |
| 398 | Error: |
| 399 | kfree(port_data); |
| 400 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | #ifdef CONFIG_PM |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 404 | static int suspend_iter(struct device *dev, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | struct pcie_port_service_driver *service_driver; |
| 407 | |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 408 | if ((dev->bus == &pcie_port_bus_type) && |
| 409 | (dev->driver)) { |
| 410 | service_driver = to_service_driver(dev->driver); |
| 411 | if (service_driver->suspend) |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 412 | service_driver->suspend(to_pcie_device(dev)); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 413 | } |
| 414 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | } |
| 416 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 417 | /** |
| 418 | * pcie_port_device_suspend - suspend port services associated with a PCIe port |
| 419 | * @dev: PCI Express port to handle |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 420 | */ |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 421 | int pcie_port_device_suspend(struct device *dev) |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 422 | { |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 423 | return device_for_each_child(dev, NULL, suspend_iter); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | static int resume_iter(struct device *dev, void *data) |
| 427 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | struct pcie_port_service_driver *service_driver; |
| 429 | |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 430 | if ((dev->bus == &pcie_port_bus_type) && |
| 431 | (dev->driver)) { |
| 432 | service_driver = to_service_driver(dev->driver); |
| 433 | if (service_driver->resume) |
| 434 | service_driver->resume(to_pcie_device(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | } |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 436 | return 0; |
| 437 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 439 | /** |
| 440 | * pcie_port_device_suspend - resume port services associated with a PCIe port |
| 441 | * @dev: PCI Express port to handle |
| 442 | */ |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 443 | int pcie_port_device_resume(struct device *dev) |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 444 | { |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 445 | return device_for_each_child(dev, NULL, resume_iter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | } |
Rafael J. Wysocki | 3a3c244 | 2009-02-15 22:32:48 +0100 | [diff] [blame] | 447 | #endif /* PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 449 | static int remove_iter(struct device *dev, void *data) |
| 450 | { |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 451 | if (dev->bus == &pcie_port_bus_type) { |
Eric W. Biederman | ae40582 | 2009-02-20 20:16:07 -0800 | [diff] [blame] | 452 | put_device(dev); |
| 453 | device_unregister(dev); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 454 | } |
| 455 | return 0; |
| 456 | } |
| 457 | |
Rafael J. Wysocki | facf6d1 | 2009-01-01 19:48:55 +0100 | [diff] [blame] | 458 | /** |
| 459 | * pcie_port_device_remove - unregister PCI Express port service devices |
| 460 | * @dev: PCI Express port the service devices to unregister are associated with |
| 461 | * |
| 462 | * Remove PCI Express port service devices associated with given port and |
| 463 | * disable MSI-X or MSI for the port. |
| 464 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | void pcie_port_device_remove(struct pci_dev *dev) |
| 466 | { |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 467 | struct pcie_port_data *port_data = pci_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
Eric W. Biederman | ae40582 | 2009-02-20 20:16:07 -0800 | [diff] [blame] | 469 | device_for_each_child(&dev->dev, NULL, remove_iter); |
Alex Chiang | 745be2e7 | 2009-03-07 21:46:49 -0700 | [diff] [blame] | 470 | pci_disable_device(dev); |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 471 | |
| 472 | switch (port_data->port_irq_mode) { |
| 473 | case PCIE_PORT_MSIX_MODE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | pci_disable_msix(dev); |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 475 | break; |
| 476 | case PCIE_PORT_MSI_MODE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | pci_disable_msi(dev); |
Rafael J. Wysocki | 1bf83e5 | 2009-01-13 14:38:34 +0100 | [diff] [blame] | 478 | break; |
| 479 | } |
| 480 | |
| 481 | kfree(port_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
| 483 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 484 | /** |
| 485 | * pcie_port_probe_service - probe driver for given PCI Express port service |
| 486 | * @dev: PCI Express port service device to probe against |
| 487 | * |
| 488 | * If PCI Express port service driver is registered with |
| 489 | * pcie_port_service_register(), this function will be called by the driver core |
| 490 | * whenever match is found between the driver and a port service device. |
| 491 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 492 | static int pcie_port_probe_service(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 494 | struct pcie_device *pciedev; |
| 495 | struct pcie_port_service_driver *driver; |
| 496 | int status; |
| 497 | |
| 498 | if (!dev || !dev->driver) |
| 499 | return -ENODEV; |
| 500 | |
| 501 | driver = to_service_driver(dev->driver); |
| 502 | if (!driver || !driver->probe) |
| 503 | return -ENODEV; |
| 504 | |
| 505 | pciedev = to_pcie_device(dev); |
Rafael J. Wysocki | 0516c8b | 2009-01-13 14:44:19 +0100 | [diff] [blame] | 506 | status = driver->probe(pciedev); |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 507 | if (!status) { |
| 508 | dev_printk(KERN_DEBUG, dev, "service driver %s loaded\n", |
| 509 | driver->name); |
| 510 | get_device(dev); |
| 511 | } |
| 512 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 515 | /** |
| 516 | * pcie_port_remove_service - detach driver from given PCI Express port service |
| 517 | * @dev: PCI Express port service device to handle |
| 518 | * |
| 519 | * If PCI Express port service driver is registered with |
| 520 | * pcie_port_service_register(), this function will be called by the driver core |
| 521 | * when device_unregister() is called for the port service device associated |
| 522 | * with the driver. |
| 523 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 524 | static int pcie_port_remove_service(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 526 | struct pcie_device *pciedev; |
| 527 | struct pcie_port_service_driver *driver; |
| 528 | |
| 529 | if (!dev || !dev->driver) |
| 530 | return 0; |
| 531 | |
| 532 | pciedev = to_pcie_device(dev); |
| 533 | driver = to_service_driver(dev->driver); |
| 534 | if (driver && driver->remove) { |
| 535 | dev_printk(KERN_DEBUG, dev, "unloading service driver %s\n", |
| 536 | driver->name); |
| 537 | driver->remove(pciedev); |
| 538 | put_device(dev); |
| 539 | } |
| 540 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
| 542 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 543 | /** |
| 544 | * pcie_port_shutdown_service - shut down given PCI Express port service |
| 545 | * @dev: PCI Express port service device to handle |
| 546 | * |
| 547 | * If PCI Express port service driver is registered with |
| 548 | * pcie_port_service_register(), this function will be called by the driver core |
| 549 | * when device_shutdown() is called for the port service device associated |
| 550 | * with the driver. |
| 551 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 552 | static void pcie_port_shutdown_service(struct device *dev) {} |
| 553 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 554 | /** |
| 555 | * pcie_port_service_register - register PCI Express port service driver |
| 556 | * @new: PCI Express port service driver to register |
| 557 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | int pcie_port_service_register(struct pcie_port_service_driver *new) |
| 559 | { |
| 560 | new->driver.name = (char *)new->name; |
| 561 | new->driver.bus = &pcie_port_bus_type; |
| 562 | new->driver.probe = pcie_port_probe_service; |
| 563 | new->driver.remove = pcie_port_remove_service; |
| 564 | new->driver.shutdown = pcie_port_shutdown_service; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
| 566 | return driver_register(&new->driver); |
long | d0e2b4a | 2005-03-29 13:36:43 -0800 | [diff] [blame] | 567 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
Rafael J. Wysocki | d934737 | 2009-01-01 19:53:32 +0100 | [diff] [blame] | 569 | /** |
| 570 | * pcie_port_service_unregister - unregister PCI Express port service driver |
| 571 | * @drv: PCI Express port service driver to unregister |
| 572 | */ |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 573 | void pcie_port_service_unregister(struct pcie_port_service_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | { |
Rafael J. Wysocki | fa6c993 | 2009-01-01 19:52:12 +0100 | [diff] [blame] | 575 | driver_unregister(&drv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | EXPORT_SYMBOL(pcie_port_service_register); |
| 579 | EXPORT_SYMBOL(pcie_port_service_unregister); |