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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 | // SPDX-License-Identifier: GPL-2.0+ /* * CompactPCI Hot Plug Driver PCI functions * * Copyright (C) 2002,2005 by SOMA Networks, Inc. * * All rights reserved. * * Send feedback to <scottm@somanetworks.com> */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/pci_hotplug.h> #include <linux/proc_fs.h> #include "../pci.h" #include "cpci_hotplug.h" #define MY_NAME "cpci_hotplug" #define dbg(format, arg...) \ do { \ if (cpci_debug) \ printk(KERN_DEBUG "%s: " format "\n", \ MY_NAME, ## arg); \ } while (0) #define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME, ## arg) #define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME, ## arg) #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME, ## arg) u8 cpci_get_attention_status(struct slot *slot) { int hs_cap; u16 hs_csr; hs_cap = pci_bus_find_capability(slot->bus, slot->devfn, PCI_CAP_ID_CHSWP); if (!hs_cap) return 0; if (pci_bus_read_config_word(slot->bus, slot->devfn, hs_cap + 2, &hs_csr)) return 0; return hs_csr & 0x0008 ? 1 : 0; } int cpci_set_attention_status(struct slot *slot, int status) { int hs_cap; u16 hs_csr; hs_cap = pci_bus_find_capability(slot->bus, slot->devfn, PCI_CAP_ID_CHSWP); if (!hs_cap) return 0; if (pci_bus_read_config_word(slot->bus, slot->devfn, hs_cap + 2, &hs_csr)) return 0; if (status) hs_csr |= HS_CSR_LOO; else hs_csr &= ~HS_CSR_LOO; if (pci_bus_write_config_word(slot->bus, slot->devfn, hs_cap + 2, hs_csr)) return 0; return 1; } u16 cpci_get_hs_csr(struct slot *slot) { int hs_cap; u16 hs_csr; hs_cap = pci_bus_find_capability(slot->bus, slot->devfn, PCI_CAP_ID_CHSWP); if (!hs_cap) return 0xFFFF; if (pci_bus_read_config_word(slot->bus, slot->devfn, hs_cap + 2, &hs_csr)) return 0xFFFF; return hs_csr; } int cpci_check_and_clear_ins(struct slot *slot) { int hs_cap; u16 hs_csr; int ins = 0; hs_cap = pci_bus_find_capability(slot->bus, slot->devfn, PCI_CAP_ID_CHSWP); if (!hs_cap) return 0; if (pci_bus_read_config_word(slot->bus, slot->devfn, hs_cap + 2, &hs_csr)) return 0; if (hs_csr & HS_CSR_INS) { /* Clear INS (by setting it) */ if (pci_bus_write_config_word(slot->bus, slot->devfn, hs_cap + 2, hs_csr)) ins = 0; else ins = 1; } return ins; } int cpci_check_ext(struct slot *slot) { int hs_cap; u16 hs_csr; int ext = 0; hs_cap = pci_bus_find_capability(slot->bus, slot->devfn, PCI_CAP_ID_CHSWP); if (!hs_cap) return 0; if (pci_bus_read_config_word(slot->bus, slot->devfn, hs_cap + 2, &hs_csr)) return 0; if (hs_csr & HS_CSR_EXT) ext = 1; return ext; } int cpci_clear_ext(struct slot *slot) { int hs_cap; u16 hs_csr; hs_cap = pci_bus_find_capability(slot->bus, slot->devfn, PCI_CAP_ID_CHSWP); if (!hs_cap) return -ENODEV; if (pci_bus_read_config_word(slot->bus, slot->devfn, hs_cap + 2, &hs_csr)) return -ENODEV; if (hs_csr & HS_CSR_EXT) { /* Clear EXT (by setting it) */ if (pci_bus_write_config_word(slot->bus, slot->devfn, hs_cap + 2, hs_csr)) return -ENODEV; } return 0; } int cpci_led_on(struct slot *slot) { int hs_cap; u16 hs_csr; hs_cap = pci_bus_find_capability(slot->bus, slot->devfn, PCI_CAP_ID_CHSWP); if (!hs_cap) return -ENODEV; if (pci_bus_read_config_word(slot->bus, slot->devfn, hs_cap + 2, &hs_csr)) return -ENODEV; if ((hs_csr & HS_CSR_LOO) != HS_CSR_LOO) { hs_csr |= HS_CSR_LOO; if (pci_bus_write_config_word(slot->bus, slot->devfn, hs_cap + 2, hs_csr)) { err("Could not set LOO for slot %s", slot_name(slot)); return -ENODEV; } } return 0; } int cpci_led_off(struct slot *slot) { int hs_cap; u16 hs_csr; hs_cap = pci_bus_find_capability(slot->bus, slot->devfn, PCI_CAP_ID_CHSWP); if (!hs_cap) return -ENODEV; if (pci_bus_read_config_word(slot->bus, slot->devfn, hs_cap + 2, &hs_csr)) return -ENODEV; if (hs_csr & HS_CSR_LOO) { hs_csr &= ~HS_CSR_LOO; if (pci_bus_write_config_word(slot->bus, slot->devfn, hs_cap + 2, hs_csr)) { err("Could not clear LOO for slot %s", slot_name(slot)); return -ENODEV; } } return 0; } /* * Device configuration functions */ int cpci_configure_slot(struct slot *slot) { struct pci_dev *dev; struct pci_bus *parent; int ret = 0; dbg("%s - enter", __func__); pci_lock_rescan_remove(); if (slot->dev == NULL) { dbg("pci_dev null, finding %02x:%02x:%x", slot->bus->number, PCI_SLOT(slot->devfn), PCI_FUNC(slot->devfn)); slot->dev = pci_get_slot(slot->bus, slot->devfn); } /* Still NULL? Well then scan for it! */ if (slot->dev == NULL) { int n; dbg("pci_dev still null"); /* * This will generate pci_dev structures for all functions, but * we will only call this case when lookup fails. */ n = pci_scan_slot(slot->bus, slot->devfn); dbg("%s: pci_scan_slot returned %d", __func__, n); slot->dev = pci_get_slot(slot->bus, slot->devfn); if (slot->dev == NULL) { err("Could not find PCI device for slot %02x", slot->number); ret = -ENODEV; goto out; } } parent = slot->dev->bus; for_each_pci_bridge(dev, parent) { if (PCI_SLOT(dev->devfn) == PCI_SLOT(slot->devfn)) pci_hp_add_bridge(dev); } pci_assign_unassigned_bridge_resources(parent->self); pci_bus_add_devices(parent); out: pci_unlock_rescan_remove(); dbg("%s - exit", __func__); return ret; } int cpci_unconfigure_slot(struct slot *slot) { struct pci_dev *dev, *temp; dbg("%s - enter", __func__); if (!slot->dev) { err("No device for slot %02x\n", slot->number); return -ENODEV; } pci_lock_rescan_remove(); list_for_each_entry_safe(dev, temp, &slot->bus->devices, bus_list) { if (PCI_SLOT(dev->devfn) != PCI_SLOT(slot->devfn)) continue; pci_dev_get(dev); pci_stop_and_remove_bus_device(dev); pci_dev_put(dev); } pci_dev_put(slot->dev); slot->dev = NULL; pci_unlock_rescan_remove(); dbg("%s - exit", __func__); return 0; } |