Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1 | /* |
Bryan O'Sullivan | 759d576 | 2006-07-01 04:35:49 -0700 | [diff] [blame] | 2 | * Copyright (c) 2006 QLogic, Inc. All rights reserved. |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 3 | * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
| 32 | */ |
| 33 | |
| 34 | #include <linux/spinlock.h> |
| 35 | #include <linux/idr.h> |
| 36 | #include <linux/pci.h> |
| 37 | #include <linux/delay.h> |
| 38 | #include <linux/netdevice.h> |
| 39 | #include <linux/vmalloc.h> |
| 40 | |
| 41 | #include "ipath_kernel.h" |
Bryan O'Sullivan | b1c1b6a | 2006-08-25 11:24:31 -0700 | [diff] [blame] | 42 | #include "ipath_verbs.h" |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 43 | #include "ipath_common.h" |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 44 | |
| 45 | static void ipath_update_pio_bufs(struct ipath_devdata *); |
| 46 | |
| 47 | const char *ipath_get_unit_name(int unit) |
| 48 | { |
| 49 | static char iname[16]; |
| 50 | snprintf(iname, sizeof iname, "infinipath%u", unit); |
| 51 | return iname; |
| 52 | } |
| 53 | |
Bryan O'Sullivan | 759d576 | 2006-07-01 04:35:49 -0700 | [diff] [blame] | 54 | #define DRIVER_LOAD_MSG "QLogic " IPATH_DRV_NAME " loaded: " |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 55 | #define PFX IPATH_DRV_NAME ": " |
| 56 | |
| 57 | /* |
| 58 | * The size has to be longer than this string, so we can append |
| 59 | * board/chip information to it in the init code. |
| 60 | */ |
Bryan O'Sullivan | b55f4f0 | 2006-08-25 11:24:33 -0700 | [diff] [blame] | 61 | const char ib_ipath_version[] = IPATH_IDSTR "\n"; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 62 | |
| 63 | static struct idr unit_table; |
| 64 | DEFINE_SPINLOCK(ipath_devs_lock); |
| 65 | LIST_HEAD(ipath_dev_list); |
| 66 | |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 67 | wait_queue_head_t ipath_state_wait; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 68 | |
| 69 | unsigned ipath_debug = __IPATH_INFO; |
| 70 | |
| 71 | module_param_named(debug, ipath_debug, uint, S_IWUSR | S_IRUGO); |
| 72 | MODULE_PARM_DESC(debug, "mask for debug prints"); |
| 73 | EXPORT_SYMBOL_GPL(ipath_debug); |
| 74 | |
| 75 | MODULE_LICENSE("GPL"); |
Bryan O'Sullivan | 759d576 | 2006-07-01 04:35:49 -0700 | [diff] [blame] | 76 | MODULE_AUTHOR("QLogic <support@pathscale.com>"); |
| 77 | MODULE_DESCRIPTION("QLogic InfiniPath driver"); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 78 | |
| 79 | const char *ipath_ibcstatus_str[] = { |
| 80 | "Disabled", |
| 81 | "LinkUp", |
| 82 | "PollActive", |
| 83 | "PollQuiet", |
| 84 | "SleepDelay", |
| 85 | "SleepQuiet", |
| 86 | "LState6", /* unused */ |
| 87 | "LState7", /* unused */ |
| 88 | "CfgDebounce", |
| 89 | "CfgRcvfCfg", |
| 90 | "CfgWaitRmt", |
| 91 | "CfgIdle", |
| 92 | "RecovRetrain", |
| 93 | "LState0xD", /* unused */ |
| 94 | "RecovWaitRmt", |
| 95 | "RecovIdle", |
| 96 | }; |
| 97 | |
| 98 | /* |
| 99 | * These variables are initialized in the chip-specific files |
| 100 | * but are defined here. |
| 101 | */ |
| 102 | u16 ipath_gpio_sda_num, ipath_gpio_scl_num; |
| 103 | u64 ipath_gpio_sda, ipath_gpio_scl; |
| 104 | u64 infinipath_i_bitsextant; |
| 105 | ipath_err_t infinipath_e_bitsextant, infinipath_hwe_bitsextant; |
| 106 | u32 infinipath_i_rcvavail_mask, infinipath_i_rcvurg_mask; |
| 107 | |
| 108 | static void __devexit ipath_remove_one(struct pci_dev *); |
| 109 | static int __devinit ipath_init_one(struct pci_dev *, |
| 110 | const struct pci_device_id *); |
| 111 | |
| 112 | /* Only needed for registration, nothing else needs this info */ |
| 113 | #define PCI_VENDOR_ID_PATHSCALE 0x1fc1 |
| 114 | #define PCI_DEVICE_ID_INFINIPATH_HT 0xd |
| 115 | #define PCI_DEVICE_ID_INFINIPATH_PE800 0x10 |
| 116 | |
| 117 | static const struct pci_device_id ipath_pci_tbl[] = { |
Roland Dreier | 6f4bb3d | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 118 | { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_HT) }, |
| 119 | { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_PE800) }, |
| 120 | { 0, } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 121 | }; |
| 122 | |
| 123 | MODULE_DEVICE_TABLE(pci, ipath_pci_tbl); |
| 124 | |
| 125 | static struct pci_driver ipath_driver = { |
| 126 | .name = IPATH_DRV_NAME, |
| 127 | .probe = ipath_init_one, |
| 128 | .remove = __devexit_p(ipath_remove_one), |
| 129 | .id_table = ipath_pci_tbl, |
| 130 | }; |
| 131 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 132 | |
| 133 | static inline void read_bars(struct ipath_devdata *dd, struct pci_dev *dev, |
| 134 | u32 *bar0, u32 *bar1) |
| 135 | { |
| 136 | int ret; |
| 137 | |
| 138 | ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, bar0); |
| 139 | if (ret) |
| 140 | ipath_dev_err(dd, "failed to read bar0 before enable: " |
| 141 | "error %d\n", -ret); |
| 142 | |
| 143 | ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, bar1); |
| 144 | if (ret) |
| 145 | ipath_dev_err(dd, "failed to read bar1 before enable: " |
| 146 | "error %d\n", -ret); |
| 147 | |
| 148 | ipath_dbg("Read bar0 %x bar1 %x\n", *bar0, *bar1); |
| 149 | } |
| 150 | |
| 151 | static void ipath_free_devdata(struct pci_dev *pdev, |
| 152 | struct ipath_devdata *dd) |
| 153 | { |
| 154 | unsigned long flags; |
| 155 | |
| 156 | pci_set_drvdata(pdev, NULL); |
| 157 | |
| 158 | if (dd->ipath_unit != -1) { |
| 159 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 160 | idr_remove(&unit_table, dd->ipath_unit); |
| 161 | list_del(&dd->ipath_list); |
| 162 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 163 | } |
Bryan O'Sullivan | 06993ca | 2006-07-01 04:36:02 -0700 | [diff] [blame] | 164 | vfree(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | static struct ipath_devdata *ipath_alloc_devdata(struct pci_dev *pdev) |
| 168 | { |
| 169 | unsigned long flags; |
| 170 | struct ipath_devdata *dd; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 171 | int ret; |
| 172 | |
| 173 | if (!idr_pre_get(&unit_table, GFP_KERNEL)) { |
| 174 | dd = ERR_PTR(-ENOMEM); |
| 175 | goto bail; |
| 176 | } |
| 177 | |
Bryan O'Sullivan | 06993ca | 2006-07-01 04:36:02 -0700 | [diff] [blame] | 178 | dd = vmalloc(sizeof(*dd)); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 179 | if (!dd) { |
| 180 | dd = ERR_PTR(-ENOMEM); |
| 181 | goto bail; |
| 182 | } |
Bryan O'Sullivan | 06993ca | 2006-07-01 04:36:02 -0700 | [diff] [blame] | 183 | memset(dd, 0, sizeof(*dd)); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 184 | dd->ipath_unit = -1; |
| 185 | |
| 186 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 187 | |
| 188 | ret = idr_get_new(&unit_table, dd, &dd->ipath_unit); |
| 189 | if (ret < 0) { |
| 190 | printk(KERN_ERR IPATH_DRV_NAME |
| 191 | ": Could not allocate unit ID: error %d\n", -ret); |
| 192 | ipath_free_devdata(pdev, dd); |
| 193 | dd = ERR_PTR(ret); |
| 194 | goto bail_unlock; |
| 195 | } |
| 196 | |
| 197 | dd->pcidev = pdev; |
| 198 | pci_set_drvdata(pdev, dd); |
| 199 | |
| 200 | list_add(&dd->ipath_list, &ipath_dev_list); |
| 201 | |
| 202 | bail_unlock: |
| 203 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 204 | |
| 205 | bail: |
| 206 | return dd; |
| 207 | } |
| 208 | |
| 209 | static inline struct ipath_devdata *__ipath_lookup(int unit) |
| 210 | { |
| 211 | return idr_find(&unit_table, unit); |
| 212 | } |
| 213 | |
| 214 | struct ipath_devdata *ipath_lookup(int unit) |
| 215 | { |
| 216 | struct ipath_devdata *dd; |
| 217 | unsigned long flags; |
| 218 | |
| 219 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 220 | dd = __ipath_lookup(unit); |
| 221 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 222 | |
| 223 | return dd; |
| 224 | } |
| 225 | |
| 226 | int ipath_count_units(int *npresentp, int *nupp, u32 *maxportsp) |
| 227 | { |
| 228 | int nunits, npresent, nup; |
| 229 | struct ipath_devdata *dd; |
| 230 | unsigned long flags; |
| 231 | u32 maxports; |
| 232 | |
| 233 | nunits = npresent = nup = maxports = 0; |
| 234 | |
| 235 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 236 | |
| 237 | list_for_each_entry(dd, &ipath_dev_list, ipath_list) { |
| 238 | nunits++; |
| 239 | if ((dd->ipath_flags & IPATH_PRESENT) && dd->ipath_kregbase) |
| 240 | npresent++; |
| 241 | if (dd->ipath_lid && |
| 242 | !(dd->ipath_flags & (IPATH_DISABLED | IPATH_LINKDOWN |
| 243 | | IPATH_LINKUNK))) |
| 244 | nup++; |
| 245 | if (dd->ipath_cfgports > maxports) |
| 246 | maxports = dd->ipath_cfgports; |
| 247 | } |
| 248 | |
| 249 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 250 | |
| 251 | if (npresentp) |
| 252 | *npresentp = npresent; |
| 253 | if (nupp) |
| 254 | *nupp = nup; |
| 255 | if (maxportsp) |
| 256 | *maxportsp = maxports; |
| 257 | |
| 258 | return nunits; |
| 259 | } |
| 260 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 261 | /* |
| 262 | * These next two routines are placeholders in case we don't have per-arch |
| 263 | * code for controlling write combining. If explicit control of write |
| 264 | * combining is not available, performance will probably be awful. |
| 265 | */ |
| 266 | |
| 267 | int __attribute__((weak)) ipath_enable_wc(struct ipath_devdata *dd) |
| 268 | { |
| 269 | return -EOPNOTSUPP; |
| 270 | } |
| 271 | |
| 272 | void __attribute__((weak)) ipath_disable_wc(struct ipath_devdata *dd) |
| 273 | { |
| 274 | } |
| 275 | |
| 276 | static int __devinit ipath_init_one(struct pci_dev *pdev, |
| 277 | const struct pci_device_id *ent) |
| 278 | { |
| 279 | int ret, len, j; |
| 280 | struct ipath_devdata *dd; |
| 281 | unsigned long long addr; |
| 282 | u32 bar0 = 0, bar1 = 0; |
| 283 | u8 rev; |
| 284 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 285 | dd = ipath_alloc_devdata(pdev); |
| 286 | if (IS_ERR(dd)) { |
| 287 | ret = PTR_ERR(dd); |
| 288 | printk(KERN_ERR IPATH_DRV_NAME |
| 289 | ": Could not allocate devdata: error %d\n", -ret); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 290 | goto bail; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | ipath_cdbg(VERBOSE, "initializing unit #%u\n", dd->ipath_unit); |
| 294 | |
| 295 | read_bars(dd, pdev, &bar0, &bar1); |
| 296 | |
| 297 | ret = pci_enable_device(pdev); |
| 298 | if (ret) { |
| 299 | /* This can happen iff: |
| 300 | * |
| 301 | * We did a chip reset, and then failed to reprogram the |
| 302 | * BAR, or the chip reset due to an internal error. We then |
| 303 | * unloaded the driver and reloaded it. |
| 304 | * |
| 305 | * Both reset cases set the BAR back to initial state. For |
| 306 | * the latter case, the AER sticky error bit at offset 0x718 |
| 307 | * should be set, but the Linux kernel doesn't yet know |
| 308 | * about that, it appears. If the original BAR was retained |
| 309 | * in the kernel data structures, this may be OK. |
| 310 | */ |
| 311 | ipath_dev_err(dd, "enable unit %d failed: error %d\n", |
| 312 | dd->ipath_unit, -ret); |
| 313 | goto bail_devdata; |
| 314 | } |
| 315 | addr = pci_resource_start(pdev, 0); |
| 316 | len = pci_resource_len(pdev, 0); |
| 317 | ipath_cdbg(VERBOSE, "regbase (0) %llx len %d irq %x, vend %x/%x " |
| 318 | "driver_data %lx\n", addr, len, pdev->irq, ent->vendor, |
| 319 | ent->device, ent->driver_data); |
| 320 | |
| 321 | read_bars(dd, pdev, &bar0, &bar1); |
| 322 | |
| 323 | if (!bar1 && !(bar0 & ~0xf)) { |
| 324 | if (addr) { |
| 325 | dev_info(&pdev->dev, "BAR is 0 (probable RESET), " |
| 326 | "rewriting as %llx\n", addr); |
| 327 | ret = pci_write_config_dword( |
| 328 | pdev, PCI_BASE_ADDRESS_0, addr); |
| 329 | if (ret) { |
| 330 | ipath_dev_err(dd, "rewrite of BAR0 " |
| 331 | "failed: err %d\n", -ret); |
| 332 | goto bail_disable; |
| 333 | } |
| 334 | ret = pci_write_config_dword( |
| 335 | pdev, PCI_BASE_ADDRESS_1, addr >> 32); |
| 336 | if (ret) { |
| 337 | ipath_dev_err(dd, "rewrite of BAR1 " |
| 338 | "failed: err %d\n", -ret); |
| 339 | goto bail_disable; |
| 340 | } |
| 341 | } else { |
| 342 | ipath_dev_err(dd, "BAR is 0 (probable RESET), " |
| 343 | "not usable until reboot\n"); |
| 344 | ret = -ENODEV; |
| 345 | goto bail_disable; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | ret = pci_request_regions(pdev, IPATH_DRV_NAME); |
| 350 | if (ret) { |
| 351 | dev_info(&pdev->dev, "pci_request_regions unit %u fails: " |
| 352 | "err %d\n", dd->ipath_unit, -ret); |
| 353 | goto bail_disable; |
| 354 | } |
| 355 | |
| 356 | ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK); |
| 357 | if (ret) { |
Bryan O'Sullivan | 68dd43a | 2006-04-24 14:22:58 -0700 | [diff] [blame] | 358 | /* |
| 359 | * if the 64 bit setup fails, try 32 bit. Some systems |
| 360 | * do not setup 64 bit maps on systems with 2GB or less |
| 361 | * memory installed. |
| 362 | */ |
| 363 | ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK); |
| 364 | if (ret) { |
Bryan O'Sullivan | b1d8865 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 365 | dev_info(&pdev->dev, |
| 366 | "Unable to set DMA mask for unit %u: %d\n", |
| 367 | dd->ipath_unit, ret); |
Bryan O'Sullivan | 68dd43a | 2006-04-24 14:22:58 -0700 | [diff] [blame] | 368 | goto bail_regions; |
| 369 | } |
Bryan O'Sullivan | b1d8865 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 370 | else { |
Bryan O'Sullivan | 68dd43a | 2006-04-24 14:22:58 -0700 | [diff] [blame] | 371 | ipath_dbg("No 64bit DMA mask, used 32 bit mask\n"); |
Bryan O'Sullivan | b1d8865 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 372 | ret = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); |
| 373 | if (ret) |
| 374 | dev_info(&pdev->dev, |
| 375 | "Unable to set DMA consistent mask " |
| 376 | "for unit %u: %d\n", |
| 377 | dd->ipath_unit, ret); |
| 378 | |
| 379 | } |
| 380 | } |
| 381 | else { |
| 382 | ret = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); |
| 383 | if (ret) |
| 384 | dev_info(&pdev->dev, |
| 385 | "Unable to set DMA consistent mask " |
| 386 | "for unit %u: %d\n", |
| 387 | dd->ipath_unit, ret); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | pci_set_master(pdev); |
| 391 | |
| 392 | /* |
| 393 | * Save BARs to rewrite after device reset. Save all 64 bits of |
| 394 | * BAR, just in case. |
| 395 | */ |
| 396 | dd->ipath_pcibar0 = addr; |
| 397 | dd->ipath_pcibar1 = addr >> 32; |
| 398 | dd->ipath_deviceid = ent->device; /* save for later use */ |
| 399 | dd->ipath_vendorid = ent->vendor; |
| 400 | |
| 401 | /* setup the chip-specific functions, as early as possible. */ |
| 402 | switch (ent->device) { |
| 403 | case PCI_DEVICE_ID_INFINIPATH_HT: |
Bryan O'Sullivan | 525d0ca | 2006-08-25 11:24:39 -0700 | [diff] [blame^] | 404 | ipath_init_iba6110_funcs(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 405 | break; |
| 406 | case PCI_DEVICE_ID_INFINIPATH_PE800: |
Bryan O'Sullivan | 525d0ca | 2006-08-25 11:24:39 -0700 | [diff] [blame^] | 407 | ipath_init_iba6120_funcs(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 408 | break; |
| 409 | default: |
Bryan O'Sullivan | 759d576 | 2006-07-01 04:35:49 -0700 | [diff] [blame] | 410 | ipath_dev_err(dd, "Found unknown QLogic deviceid 0x%x, " |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 411 | "failing\n", ent->device); |
| 412 | return -ENODEV; |
| 413 | } |
| 414 | |
| 415 | for (j = 0; j < 6; j++) { |
| 416 | if (!pdev->resource[j].start) |
| 417 | continue; |
Greg Kroah-Hartman | e29419f | 2006-06-12 15:20:16 -0700 | [diff] [blame] | 418 | ipath_cdbg(VERBOSE, "BAR %d start %llx, end %llx, len %llx\n", |
| 419 | j, (unsigned long long)pdev->resource[j].start, |
| 420 | (unsigned long long)pdev->resource[j].end, |
| 421 | (unsigned long long)pci_resource_len(pdev, j)); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | if (!addr) { |
| 425 | ipath_dev_err(dd, "No valid address in BAR 0!\n"); |
| 426 | ret = -ENODEV; |
| 427 | goto bail_regions; |
| 428 | } |
| 429 | |
| 430 | dd->ipath_deviceid = ent->device; /* save for later use */ |
| 431 | dd->ipath_vendorid = ent->vendor; |
| 432 | |
| 433 | ret = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev); |
| 434 | if (ret) { |
| 435 | ipath_dev_err(dd, "Failed to read PCI revision ID unit " |
| 436 | "%u: err %d\n", dd->ipath_unit, -ret); |
| 437 | goto bail_regions; /* shouldn't ever happen */ |
| 438 | } |
| 439 | dd->ipath_pcirev = rev; |
| 440 | |
Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 441 | #if defined(__powerpc__) |
| 442 | /* There isn't a generic way to specify writethrough mappings */ |
| 443 | dd->ipath_kregbase = __ioremap(addr, len, |
| 444 | (_PAGE_NO_CACHE|_PAGE_WRITETHRU)); |
| 445 | #else |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 446 | dd->ipath_kregbase = ioremap_nocache(addr, len); |
Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 447 | #endif |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 448 | |
| 449 | if (!dd->ipath_kregbase) { |
| 450 | ipath_dbg("Unable to map io addr %llx to kvirt, failing\n", |
| 451 | addr); |
| 452 | ret = -ENOMEM; |
| 453 | goto bail_iounmap; |
| 454 | } |
| 455 | dd->ipath_kregend = (u64 __iomem *) |
| 456 | ((void __iomem *)dd->ipath_kregbase + len); |
| 457 | dd->ipath_physaddr = addr; /* used for io_remap, etc. */ |
| 458 | /* for user mmap */ |
Bryan O'Sullivan | b35f004 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 459 | ipath_cdbg(VERBOSE, "mapped io addr %llx to kregbase %p\n", |
| 460 | addr, dd->ipath_kregbase); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 461 | |
| 462 | /* |
| 463 | * clear ipath_flags here instead of in ipath_init_chip as it is set |
| 464 | * by ipath_setup_htconfig. |
| 465 | */ |
| 466 | dd->ipath_flags = 0; |
Bryan O'Sullivan | fba7520 | 2006-07-01 04:36:09 -0700 | [diff] [blame] | 467 | dd->ipath_lli_counter = 0; |
| 468 | dd->ipath_lli_errors = 0; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 469 | |
| 470 | if (dd->ipath_f_bus(dd, pdev)) |
| 471 | ipath_dev_err(dd, "Failed to setup config space; " |
| 472 | "continuing anyway\n"); |
| 473 | |
| 474 | /* |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 475 | * set up our interrupt handler; IRQF_SHARED probably not needed, |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 476 | * since MSI interrupts shouldn't be shared but won't hurt for now. |
| 477 | * check 0 irq after we return from chip-specific bus setup, since |
| 478 | * that can affect this due to setup |
| 479 | */ |
| 480 | if (!pdev->irq) |
| 481 | ipath_dev_err(dd, "irq is 0, BIOS error? Interrupts won't " |
| 482 | "work\n"); |
| 483 | else { |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 484 | ret = request_irq(pdev->irq, ipath_intr, IRQF_SHARED, |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 485 | IPATH_DRV_NAME, dd); |
| 486 | if (ret) { |
| 487 | ipath_dev_err(dd, "Couldn't setup irq handler, " |
| 488 | "irq=%u: %d\n", pdev->irq, ret); |
| 489 | goto bail_iounmap; |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | ret = ipath_init_chip(dd, 0); /* do the chip-specific init */ |
| 494 | if (ret) |
| 495 | goto bail_iounmap; |
| 496 | |
| 497 | ret = ipath_enable_wc(dd); |
| 498 | |
| 499 | if (ret) { |
| 500 | ipath_dev_err(dd, "Write combining not enabled " |
| 501 | "(err %d): performance may be poor\n", |
| 502 | -ret); |
| 503 | ret = 0; |
| 504 | } |
| 505 | |
| 506 | ipath_device_create_group(&pdev->dev, dd); |
| 507 | ipathfs_add_device(dd); |
| 508 | ipath_user_add(dd); |
Bryan O'Sullivan | a2acb2f | 2006-07-01 04:35:52 -0700 | [diff] [blame] | 509 | ipath_diag_add(dd); |
Bryan O'Sullivan | b1c1b6a | 2006-08-25 11:24:31 -0700 | [diff] [blame] | 510 | ipath_register_ib_device(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 511 | |
| 512 | goto bail; |
| 513 | |
| 514 | bail_iounmap: |
| 515 | iounmap((volatile void __iomem *) dd->ipath_kregbase); |
| 516 | |
| 517 | bail_regions: |
| 518 | pci_release_regions(pdev); |
| 519 | |
| 520 | bail_disable: |
| 521 | pci_disable_device(pdev); |
| 522 | |
| 523 | bail_devdata: |
| 524 | ipath_free_devdata(pdev, dd); |
| 525 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 526 | bail: |
| 527 | return ret; |
| 528 | } |
| 529 | |
| 530 | static void __devexit ipath_remove_one(struct pci_dev *pdev) |
| 531 | { |
| 532 | struct ipath_devdata *dd; |
| 533 | |
| 534 | ipath_cdbg(VERBOSE, "removing, pdev=%p\n", pdev); |
| 535 | if (!pdev) |
| 536 | return; |
| 537 | |
| 538 | dd = pci_get_drvdata(pdev); |
Bryan O'Sullivan | b1c1b6a | 2006-08-25 11:24:31 -0700 | [diff] [blame] | 539 | ipath_unregister_ib_device(dd->verbs_dev); |
Bryan O'Sullivan | a2acb2f | 2006-07-01 04:35:52 -0700 | [diff] [blame] | 540 | ipath_diag_remove(dd); |
| 541 | ipath_user_remove(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 542 | ipathfs_remove_device(dd); |
| 543 | ipath_device_remove_group(&pdev->dev, dd); |
| 544 | ipath_cdbg(VERBOSE, "Releasing pci memory regions, dd %p, " |
| 545 | "unit %u\n", dd, (u32) dd->ipath_unit); |
| 546 | if (dd->ipath_kregbase) { |
| 547 | ipath_cdbg(VERBOSE, "Unmapping kregbase %p\n", |
| 548 | dd->ipath_kregbase); |
| 549 | iounmap((volatile void __iomem *) dd->ipath_kregbase); |
| 550 | dd->ipath_kregbase = NULL; |
| 551 | } |
| 552 | pci_release_regions(pdev); |
| 553 | ipath_cdbg(VERBOSE, "calling pci_disable_device\n"); |
| 554 | pci_disable_device(pdev); |
| 555 | |
| 556 | ipath_free_devdata(pdev, dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | /* general driver use */ |
| 560 | DEFINE_MUTEX(ipath_mutex); |
| 561 | |
| 562 | static DEFINE_SPINLOCK(ipath_pioavail_lock); |
| 563 | |
| 564 | /** |
| 565 | * ipath_disarm_piobufs - cancel a range of PIO buffers |
| 566 | * @dd: the infinipath device |
| 567 | * @first: the first PIO buffer to cancel |
| 568 | * @cnt: the number of PIO buffers to cancel |
| 569 | * |
| 570 | * cancel a range of PIO buffers, used when they might be armed, but |
| 571 | * not triggered. Used at init to ensure buffer state, and also user |
| 572 | * process close, in case it died while writing to a PIO buffer |
| 573 | * Also after errors. |
| 574 | */ |
| 575 | void ipath_disarm_piobufs(struct ipath_devdata *dd, unsigned first, |
| 576 | unsigned cnt) |
| 577 | { |
| 578 | unsigned i, last = first + cnt; |
| 579 | u64 sendctrl, sendorig; |
| 580 | |
| 581 | ipath_cdbg(PKT, "disarm %u PIObufs first=%u\n", cnt, first); |
| 582 | sendorig = dd->ipath_sendctrl | INFINIPATH_S_DISARM; |
| 583 | for (i = first; i < last; i++) { |
| 584 | sendctrl = sendorig | |
| 585 | (i << INFINIPATH_S_DISARMPIOBUF_SHIFT); |
| 586 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 587 | sendctrl); |
| 588 | } |
| 589 | |
| 590 | /* |
| 591 | * Write it again with current value, in case ipath_sendctrl changed |
| 592 | * while we were looping; no critical bits that would require |
| 593 | * locking. |
| 594 | * |
| 595 | * Write a 0, and then the original value, reading scratch in |
| 596 | * between. This seems to avoid a chip timing race that causes |
| 597 | * pioavail updates to memory to stop. |
| 598 | */ |
| 599 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 600 | 0); |
| 601 | sendorig = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 602 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 603 | dd->ipath_sendctrl); |
| 604 | } |
| 605 | |
| 606 | /** |
| 607 | * ipath_wait_linkstate - wait for an IB link state change to occur |
| 608 | * @dd: the infinipath device |
| 609 | * @state: the state to wait for |
| 610 | * @msecs: the number of milliseconds to wait |
| 611 | * |
| 612 | * wait up to msecs milliseconds for IB link state change to occur for |
| 613 | * now, take the easy polling route. Currently used only by |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 614 | * ipath_set_linkstate. Returns 0 if state reached, otherwise |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 615 | * -ETIMEDOUT state can have multiple states set, for any of several |
| 616 | * transitions. |
| 617 | */ |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 618 | static int ipath_wait_linkstate(struct ipath_devdata *dd, u32 state, |
| 619 | int msecs) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 620 | { |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 621 | dd->ipath_state_wanted = state; |
| 622 | wait_event_interruptible_timeout(ipath_state_wait, |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 623 | (dd->ipath_flags & state), |
| 624 | msecs_to_jiffies(msecs)); |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 625 | dd->ipath_state_wanted = 0; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 626 | |
| 627 | if (!(dd->ipath_flags & state)) { |
| 628 | u64 val; |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 629 | ipath_cdbg(VERBOSE, "Didn't reach linkstate %s within %u" |
| 630 | " ms\n", |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 631 | /* test INIT ahead of DOWN, both can be set */ |
| 632 | (state & IPATH_LINKINIT) ? "INIT" : |
| 633 | ((state & IPATH_LINKDOWN) ? "DOWN" : |
| 634 | ((state & IPATH_LINKARMED) ? "ARM" : "ACTIVE")), |
| 635 | msecs); |
| 636 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); |
| 637 | ipath_cdbg(VERBOSE, "ibcc=%llx ibcstatus=%llx (%s)\n", |
| 638 | (unsigned long long) ipath_read_kreg64( |
| 639 | dd, dd->ipath_kregs->kr_ibcctrl), |
| 640 | (unsigned long long) val, |
| 641 | ipath_ibcstatus_str[val & 0xf]); |
| 642 | } |
| 643 | return (dd->ipath_flags & state) ? 0 : -ETIMEDOUT; |
| 644 | } |
| 645 | |
| 646 | void ipath_decode_err(char *buf, size_t blen, ipath_err_t err) |
| 647 | { |
| 648 | *buf = '\0'; |
| 649 | if (err & INFINIPATH_E_RHDRLEN) |
| 650 | strlcat(buf, "rhdrlen ", blen); |
| 651 | if (err & INFINIPATH_E_RBADTID) |
| 652 | strlcat(buf, "rbadtid ", blen); |
| 653 | if (err & INFINIPATH_E_RBADVERSION) |
| 654 | strlcat(buf, "rbadversion ", blen); |
| 655 | if (err & INFINIPATH_E_RHDR) |
| 656 | strlcat(buf, "rhdr ", blen); |
| 657 | if (err & INFINIPATH_E_RLONGPKTLEN) |
| 658 | strlcat(buf, "rlongpktlen ", blen); |
| 659 | if (err & INFINIPATH_E_RSHORTPKTLEN) |
| 660 | strlcat(buf, "rshortpktlen ", blen); |
| 661 | if (err & INFINIPATH_E_RMAXPKTLEN) |
| 662 | strlcat(buf, "rmaxpktlen ", blen); |
| 663 | if (err & INFINIPATH_E_RMINPKTLEN) |
| 664 | strlcat(buf, "rminpktlen ", blen); |
| 665 | if (err & INFINIPATH_E_RFORMATERR) |
| 666 | strlcat(buf, "rformaterr ", blen); |
| 667 | if (err & INFINIPATH_E_RUNSUPVL) |
| 668 | strlcat(buf, "runsupvl ", blen); |
| 669 | if (err & INFINIPATH_E_RUNEXPCHAR) |
| 670 | strlcat(buf, "runexpchar ", blen); |
| 671 | if (err & INFINIPATH_E_RIBFLOW) |
| 672 | strlcat(buf, "ribflow ", blen); |
| 673 | if (err & INFINIPATH_E_REBP) |
| 674 | strlcat(buf, "EBP ", blen); |
| 675 | if (err & INFINIPATH_E_SUNDERRUN) |
| 676 | strlcat(buf, "sunderrun ", blen); |
| 677 | if (err & INFINIPATH_E_SPIOARMLAUNCH) |
| 678 | strlcat(buf, "spioarmlaunch ", blen); |
| 679 | if (err & INFINIPATH_E_SUNEXPERRPKTNUM) |
| 680 | strlcat(buf, "sunexperrpktnum ", blen); |
| 681 | if (err & INFINIPATH_E_SDROPPEDDATAPKT) |
| 682 | strlcat(buf, "sdroppeddatapkt ", blen); |
| 683 | if (err & INFINIPATH_E_SDROPPEDSMPPKT) |
| 684 | strlcat(buf, "sdroppedsmppkt ", blen); |
| 685 | if (err & INFINIPATH_E_SMAXPKTLEN) |
| 686 | strlcat(buf, "smaxpktlen ", blen); |
| 687 | if (err & INFINIPATH_E_SMINPKTLEN) |
| 688 | strlcat(buf, "sminpktlen ", blen); |
| 689 | if (err & INFINIPATH_E_SUNSUPVL) |
| 690 | strlcat(buf, "sunsupVL ", blen); |
| 691 | if (err & INFINIPATH_E_SPKTLEN) |
| 692 | strlcat(buf, "spktlen ", blen); |
| 693 | if (err & INFINIPATH_E_INVALIDADDR) |
| 694 | strlcat(buf, "invalidaddr ", blen); |
| 695 | if (err & INFINIPATH_E_RICRC) |
| 696 | strlcat(buf, "CRC ", blen); |
| 697 | if (err & INFINIPATH_E_RVCRC) |
| 698 | strlcat(buf, "VCRC ", blen); |
| 699 | if (err & INFINIPATH_E_RRCVEGRFULL) |
| 700 | strlcat(buf, "rcvegrfull ", blen); |
| 701 | if (err & INFINIPATH_E_RRCVHDRFULL) |
| 702 | strlcat(buf, "rcvhdrfull ", blen); |
| 703 | if (err & INFINIPATH_E_IBSTATUSCHANGED) |
| 704 | strlcat(buf, "ibcstatuschg ", blen); |
| 705 | if (err & INFINIPATH_E_RIBLOSTLINK) |
| 706 | strlcat(buf, "riblostlink ", blen); |
| 707 | if (err & INFINIPATH_E_HARDWARE) |
| 708 | strlcat(buf, "hardware ", blen); |
| 709 | if (err & INFINIPATH_E_RESET) |
| 710 | strlcat(buf, "reset ", blen); |
| 711 | } |
| 712 | |
| 713 | /** |
| 714 | * get_rhf_errstring - decode RHF errors |
| 715 | * @err: the err number |
| 716 | * @msg: the output buffer |
| 717 | * @len: the length of the output buffer |
| 718 | * |
| 719 | * only used one place now, may want more later |
| 720 | */ |
| 721 | static void get_rhf_errstring(u32 err, char *msg, size_t len) |
| 722 | { |
| 723 | /* if no errors, and so don't need to check what's first */ |
| 724 | *msg = '\0'; |
| 725 | |
| 726 | if (err & INFINIPATH_RHF_H_ICRCERR) |
| 727 | strlcat(msg, "icrcerr ", len); |
| 728 | if (err & INFINIPATH_RHF_H_VCRCERR) |
| 729 | strlcat(msg, "vcrcerr ", len); |
| 730 | if (err & INFINIPATH_RHF_H_PARITYERR) |
| 731 | strlcat(msg, "parityerr ", len); |
| 732 | if (err & INFINIPATH_RHF_H_LENERR) |
| 733 | strlcat(msg, "lenerr ", len); |
| 734 | if (err & INFINIPATH_RHF_H_MTUERR) |
| 735 | strlcat(msg, "mtuerr ", len); |
| 736 | if (err & INFINIPATH_RHF_H_IHDRERR) |
| 737 | /* infinipath hdr checksum error */ |
| 738 | strlcat(msg, "ipathhdrerr ", len); |
| 739 | if (err & INFINIPATH_RHF_H_TIDERR) |
| 740 | strlcat(msg, "tiderr ", len); |
| 741 | if (err & INFINIPATH_RHF_H_MKERR) |
| 742 | /* bad port, offset, etc. */ |
| 743 | strlcat(msg, "invalid ipathhdr ", len); |
| 744 | if (err & INFINIPATH_RHF_H_IBERR) |
| 745 | strlcat(msg, "iberr ", len); |
| 746 | if (err & INFINIPATH_RHF_L_SWA) |
| 747 | strlcat(msg, "swA ", len); |
| 748 | if (err & INFINIPATH_RHF_L_SWB) |
| 749 | strlcat(msg, "swB ", len); |
| 750 | } |
| 751 | |
| 752 | /** |
| 753 | * ipath_get_egrbuf - get an eager buffer |
| 754 | * @dd: the infinipath device |
| 755 | * @bufnum: the eager buffer to get |
| 756 | * @err: unused |
| 757 | * |
| 758 | * must only be called if ipath_pd[port] is known to be allocated |
| 759 | */ |
| 760 | static inline void *ipath_get_egrbuf(struct ipath_devdata *dd, u32 bufnum, |
| 761 | int err) |
| 762 | { |
| 763 | return dd->ipath_port0_skbs ? |
| 764 | (void *)dd->ipath_port0_skbs[bufnum]->data : NULL; |
| 765 | } |
| 766 | |
| 767 | /** |
| 768 | * ipath_alloc_skb - allocate an skb and buffer with possible constraints |
| 769 | * @dd: the infinipath device |
| 770 | * @gfp_mask: the sk_buff SFP mask |
| 771 | */ |
| 772 | struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, |
| 773 | gfp_t gfp_mask) |
| 774 | { |
| 775 | struct sk_buff *skb; |
| 776 | u32 len; |
| 777 | |
| 778 | /* |
| 779 | * Only fully supported way to handle this is to allocate lots |
| 780 | * extra, align as needed, and then do skb_reserve(). That wastes |
| 781 | * a lot of memory... I'll have to hack this into infinipath_copy |
| 782 | * also. |
| 783 | */ |
| 784 | |
| 785 | /* |
| 786 | * We need 4 extra bytes for unaligned transfer copying |
| 787 | */ |
| 788 | if (dd->ipath_flags & IPATH_4BYTE_TID) { |
| 789 | /* we need a 4KB multiple alignment, and there is no way |
| 790 | * to do it except to allocate extra and then skb_reserve |
| 791 | * enough to bring it up to the right alignment. |
| 792 | */ |
| 793 | len = dd->ipath_ibmaxlen + 4 + (1 << 11) - 1; |
| 794 | } |
| 795 | else |
| 796 | len = dd->ipath_ibmaxlen + 4; |
| 797 | skb = __dev_alloc_skb(len, gfp_mask); |
| 798 | if (!skb) { |
| 799 | ipath_dev_err(dd, "Failed to allocate skbuff, length %u\n", |
| 800 | len); |
| 801 | goto bail; |
| 802 | } |
| 803 | if (dd->ipath_flags & IPATH_4BYTE_TID) { |
| 804 | u32 una = ((1 << 11) - 1) & (unsigned long)(skb->data + 4); |
| 805 | if (una) |
| 806 | skb_reserve(skb, 4 + (1 << 11) - una); |
| 807 | else |
| 808 | skb_reserve(skb, 4); |
| 809 | } else |
| 810 | skb_reserve(skb, 4); |
| 811 | |
| 812 | bail: |
| 813 | return skb; |
| 814 | } |
| 815 | |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 816 | static void ipath_rcv_hdrerr(struct ipath_devdata *dd, |
| 817 | u32 eflags, |
| 818 | u32 l, |
| 819 | u32 etail, |
| 820 | u64 *rc) |
| 821 | { |
| 822 | char emsg[128]; |
| 823 | struct ipath_message_header *hdr; |
| 824 | |
| 825 | get_rhf_errstring(eflags, emsg, sizeof emsg); |
| 826 | hdr = (struct ipath_message_header *)&rc[1]; |
| 827 | ipath_cdbg(PKT, "RHFerrs %x hdrqtail=%x typ=%u " |
| 828 | "tlen=%x opcode=%x egridx=%x: %s\n", |
| 829 | eflags, l, |
| 830 | ipath_hdrget_rcv_type((__le32 *) rc), |
| 831 | ipath_hdrget_length_in_bytes((__le32 *) rc), |
| 832 | be32_to_cpu(hdr->bth[0]) >> 24, |
| 833 | etail, emsg); |
| 834 | |
| 835 | /* Count local link integrity errors. */ |
| 836 | if (eflags & (INFINIPATH_RHF_H_ICRCERR | INFINIPATH_RHF_H_VCRCERR)) { |
| 837 | u8 n = (dd->ipath_ibcctrl >> |
| 838 | INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) & |
| 839 | INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK; |
| 840 | |
| 841 | if (++dd->ipath_lli_counter > n) { |
| 842 | dd->ipath_lli_counter = 0; |
| 843 | dd->ipath_lli_errors++; |
| 844 | } |
| 845 | } |
| 846 | } |
| 847 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 848 | /* |
| 849 | * ipath_kreceive - receive a packet |
| 850 | * @dd: the infinipath device |
| 851 | * |
| 852 | * called from interrupt handler for errors or receive interrupt |
| 853 | */ |
| 854 | void ipath_kreceive(struct ipath_devdata *dd) |
| 855 | { |
| 856 | u64 *rc; |
| 857 | void *ebuf; |
| 858 | const u32 rsize = dd->ipath_rcvhdrentsize; /* words */ |
| 859 | const u32 maxcnt = dd->ipath_rcvhdrcnt * rsize; /* words */ |
| 860 | u32 etail = -1, l, hdrqtail; |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 861 | struct ipath_message_header *hdr; |
Bryan O'Sullivan | 57abad2 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 862 | u32 eflags, i, etype, tlen, pkttot = 0, updegr=0, reloop=0; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 863 | static u64 totcalls; /* stats, may eventually remove */ |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 864 | |
| 865 | if (!dd->ipath_hdrqtailptr) { |
| 866 | ipath_dev_err(dd, |
| 867 | "hdrqtailptr not set, can't do receives\n"); |
| 868 | goto bail; |
| 869 | } |
| 870 | |
| 871 | /* There is already a thread processing this queue. */ |
| 872 | if (test_and_set_bit(0, &dd->ipath_rcv_pending)) |
| 873 | goto bail; |
| 874 | |
Bryan O'Sullivan | f5f9992 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 875 | l = dd->ipath_port0head; |
Bryan O'Sullivan | 57abad2 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 876 | hdrqtail = (u32) le64_to_cpu(*dd->ipath_hdrqtailptr); |
| 877 | if (l == hdrqtail) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 878 | goto done; |
| 879 | |
Bryan O'Sullivan | 57abad2 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 880 | reloop: |
Bryan O'Sullivan | f5f9992 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 881 | for (i = 0; l != hdrqtail; i++) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 882 | u32 qp; |
| 883 | u8 *bthbytes; |
| 884 | |
| 885 | rc = (u64 *) (dd->ipath_pd[0]->port_rcvhdrq + (l << 2)); |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 886 | hdr = (struct ipath_message_header *)&rc[1]; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 887 | /* |
| 888 | * could make a network order version of IPATH_KD_QP, and |
| 889 | * do the obvious shift before masking to speed this up. |
| 890 | */ |
| 891 | qp = ntohl(hdr->bth[1]) & 0xffffff; |
| 892 | bthbytes = (u8 *) hdr->bth; |
| 893 | |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 894 | eflags = ipath_hdrget_err_flags((__le32 *) rc); |
| 895 | etype = ipath_hdrget_rcv_type((__le32 *) rc); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 896 | /* total length */ |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 897 | tlen = ipath_hdrget_length_in_bytes((__le32 *) rc); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 898 | ebuf = NULL; |
| 899 | if (etype != RCVHQ_RCV_TYPE_EXPECTED) { |
| 900 | /* |
| 901 | * it turns out that the chips uses an eager buffer |
| 902 | * for all non-expected packets, whether it "needs" |
| 903 | * one or not. So always get the index, but don't |
| 904 | * set ebuf (so we try to copy data) unless the |
| 905 | * length requires it. |
| 906 | */ |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 907 | etail = ipath_hdrget_index((__le32 *) rc); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 908 | if (tlen > sizeof(*hdr) || |
| 909 | etype == RCVHQ_RCV_TYPE_NON_KD) |
| 910 | ebuf = ipath_get_egrbuf(dd, etail, 0); |
| 911 | } |
| 912 | |
| 913 | /* |
| 914 | * both tiderr and ipathhdrerr are set for all plain IB |
| 915 | * packets; only ipathhdrerr should be set. |
| 916 | */ |
| 917 | |
| 918 | if (etype != RCVHQ_RCV_TYPE_NON_KD && etype != |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 919 | RCVHQ_RCV_TYPE_ERROR && ipath_hdrget_ipath_ver( |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 920 | hdr->iph.ver_port_tid_offset) != |
| 921 | IPS_PROTO_VERSION) { |
| 922 | ipath_cdbg(PKT, "Bad InfiniPath protocol version " |
| 923 | "%x\n", etype); |
| 924 | } |
| 925 | |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 926 | if (unlikely(eflags)) |
| 927 | ipath_rcv_hdrerr(dd, eflags, l, etail, rc); |
| 928 | else if (etype == RCVHQ_RCV_TYPE_NON_KD) { |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 929 | ipath_ib_rcv(dd->verbs_dev, rc + 1, ebuf, tlen); |
| 930 | if (dd->ipath_lli_counter) |
| 931 | dd->ipath_lli_counter--; |
| 932 | ipath_cdbg(PKT, "typ %x, opcode %x (eager, " |
| 933 | "qp=%x), len %x; ignored\n", |
| 934 | etype, bthbytes[0], qp, tlen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 935 | } |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 936 | else if (etype == RCVHQ_RCV_TYPE_EAGER) |
| 937 | ipath_cdbg(PKT, "typ %x, opcode %x (eager, " |
| 938 | "qp=%x), len %x; ignored\n", |
| 939 | etype, bthbytes[0], qp, tlen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 940 | else if (etype == RCVHQ_RCV_TYPE_EXPECTED) |
| 941 | ipath_dbg("Bug: Expected TID, opcode %x; ignored\n", |
| 942 | be32_to_cpu(hdr->bth[0]) & 0xff); |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 943 | else { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 944 | /* |
| 945 | * error packet, type of error unknown. |
| 946 | * Probably type 3, but we don't know, so don't |
| 947 | * even try to print the opcode, etc. |
| 948 | */ |
| 949 | ipath_dbg("Error Pkt, but no eflags! egrbuf %x, " |
| 950 | "len %x\nhdrq@%lx;hdrq+%x rhf: %llx; " |
| 951 | "hdr %llx %llx %llx %llx %llx\n", |
| 952 | etail, tlen, (unsigned long) rc, l, |
| 953 | (unsigned long long) rc[0], |
| 954 | (unsigned long long) rc[1], |
| 955 | (unsigned long long) rc[2], |
| 956 | (unsigned long long) rc[3], |
| 957 | (unsigned long long) rc[4], |
| 958 | (unsigned long long) rc[5]); |
| 959 | } |
| 960 | l += rsize; |
| 961 | if (l >= maxcnt) |
| 962 | l = 0; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 963 | if (etype != RCVHQ_RCV_TYPE_EXPECTED) |
Bryan O'Sullivan | f5f9992 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 964 | updegr = 1; |
| 965 | /* |
| 966 | * update head regs on last packet, and every 16 packets. |
| 967 | * Reduce bus traffic, while still trying to prevent |
| 968 | * rcvhdrq overflows, for when the queue is nearly full |
| 969 | */ |
| 970 | if (l == hdrqtail || (i && !(i&0xf))) { |
| 971 | u64 lval; |
Bryan O'Sullivan | 525d0ca | 2006-08-25 11:24:39 -0700 | [diff] [blame^] | 972 | if (l == hdrqtail) |
| 973 | /* request IBA6120 interrupt only on last */ |
Bryan O'Sullivan | f5f9992 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 974 | lval = dd->ipath_rhdrhead_intr_off | l; |
| 975 | else |
| 976 | lval = l; |
| 977 | (void)ipath_write_ureg(dd, ur_rcvhdrhead, lval, 0); |
| 978 | if (updegr) { |
| 979 | (void)ipath_write_ureg(dd, ur_rcvegrindexhead, |
| 980 | etail, 0); |
| 981 | updegr = 0; |
| 982 | } |
| 983 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 984 | } |
| 985 | |
Bryan O'Sullivan | 57abad2 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 986 | if (!dd->ipath_rhdrhead_intr_off && !reloop) { |
Bryan O'Sullivan | 525d0ca | 2006-08-25 11:24:39 -0700 | [diff] [blame^] | 987 | /* IBA6110 workaround; we can have a race clearing chip |
Bryan O'Sullivan | 57abad2 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 988 | * interrupt with another interrupt about to be delivered, |
| 989 | * and can clear it before it is delivered on the GPIO |
| 990 | * workaround. By doing the extra check here for the |
| 991 | * in-memory tail register updating while we were doing |
| 992 | * earlier packets, we "almost" guarantee we have covered |
| 993 | * that case. |
| 994 | */ |
| 995 | u32 hqtail = (u32)le64_to_cpu(*dd->ipath_hdrqtailptr); |
| 996 | if (hqtail != hdrqtail) { |
| 997 | hdrqtail = hqtail; |
| 998 | reloop = 1; /* loop 1 extra time at most */ |
| 999 | goto reloop; |
| 1000 | } |
| 1001 | } |
| 1002 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1003 | pkttot += i; |
| 1004 | |
| 1005 | dd->ipath_port0head = l; |
| 1006 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1007 | if (pkttot > ipath_stats.sps_maxpkts_call) |
| 1008 | ipath_stats.sps_maxpkts_call = pkttot; |
| 1009 | ipath_stats.sps_port0pkts += pkttot; |
| 1010 | ipath_stats.sps_avgpkts_call = |
| 1011 | ipath_stats.sps_port0pkts / ++totcalls; |
| 1012 | |
| 1013 | done: |
| 1014 | clear_bit(0, &dd->ipath_rcv_pending); |
| 1015 | smp_mb__after_clear_bit(); |
| 1016 | |
| 1017 | bail:; |
| 1018 | } |
| 1019 | |
| 1020 | /** |
| 1021 | * ipath_update_pio_bufs - update shadow copy of the PIO availability map |
| 1022 | * @dd: the infinipath device |
| 1023 | * |
| 1024 | * called whenever our local copy indicates we have run out of send buffers |
| 1025 | * NOTE: This can be called from interrupt context by some code |
| 1026 | * and from non-interrupt context by ipath_getpiobuf(). |
| 1027 | */ |
| 1028 | |
| 1029 | static void ipath_update_pio_bufs(struct ipath_devdata *dd) |
| 1030 | { |
| 1031 | unsigned long flags; |
| 1032 | int i; |
| 1033 | const unsigned piobregs = (unsigned)dd->ipath_pioavregs; |
| 1034 | |
| 1035 | /* If the generation (check) bits have changed, then we update the |
| 1036 | * busy bit for the corresponding PIO buffer. This algorithm will |
| 1037 | * modify positions to the value they already have in some cases |
| 1038 | * (i.e., no change), but it's faster than changing only the bits |
| 1039 | * that have changed. |
| 1040 | * |
| 1041 | * We would like to do this atomicly, to avoid spinlocks in the |
| 1042 | * critical send path, but that's not really possible, given the |
| 1043 | * type of changes, and that this routine could be called on |
| 1044 | * multiple cpu's simultaneously, so we lock in this routine only, |
| 1045 | * to avoid conflicting updates; all we change is the shadow, and |
| 1046 | * it's a single 64 bit memory location, so by definition the update |
| 1047 | * is atomic in terms of what other cpu's can see in testing the |
| 1048 | * bits. The spin_lock overhead isn't too bad, since it only |
| 1049 | * happens when all buffers are in use, so only cpu overhead, not |
| 1050 | * latency or bandwidth is affected. |
| 1051 | */ |
| 1052 | #define _IPATH_ALL_CHECKBITS 0x5555555555555555ULL |
| 1053 | if (!dd->ipath_pioavailregs_dma) { |
| 1054 | ipath_dbg("Update shadow pioavail, but regs_dma NULL!\n"); |
| 1055 | return; |
| 1056 | } |
| 1057 | if (ipath_debug & __IPATH_VERBDBG) { |
| 1058 | /* only if packet debug and verbose */ |
| 1059 | volatile __le64 *dma = dd->ipath_pioavailregs_dma; |
| 1060 | unsigned long *shadow = dd->ipath_pioavailshadow; |
| 1061 | |
| 1062 | ipath_cdbg(PKT, "Refill avail, dma0=%llx shad0=%lx, " |
| 1063 | "d1=%llx s1=%lx, d2=%llx s2=%lx, d3=%llx " |
| 1064 | "s3=%lx\n", |
| 1065 | (unsigned long long) le64_to_cpu(dma[0]), |
| 1066 | shadow[0], |
| 1067 | (unsigned long long) le64_to_cpu(dma[1]), |
| 1068 | shadow[1], |
| 1069 | (unsigned long long) le64_to_cpu(dma[2]), |
| 1070 | shadow[2], |
| 1071 | (unsigned long long) le64_to_cpu(dma[3]), |
| 1072 | shadow[3]); |
| 1073 | if (piobregs > 4) |
| 1074 | ipath_cdbg( |
| 1075 | PKT, "2nd group, dma4=%llx shad4=%lx, " |
| 1076 | "d5=%llx s5=%lx, d6=%llx s6=%lx, " |
| 1077 | "d7=%llx s7=%lx\n", |
| 1078 | (unsigned long long) le64_to_cpu(dma[4]), |
| 1079 | shadow[4], |
| 1080 | (unsigned long long) le64_to_cpu(dma[5]), |
| 1081 | shadow[5], |
| 1082 | (unsigned long long) le64_to_cpu(dma[6]), |
| 1083 | shadow[6], |
| 1084 | (unsigned long long) le64_to_cpu(dma[7]), |
| 1085 | shadow[7]); |
| 1086 | } |
| 1087 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
| 1088 | for (i = 0; i < piobregs; i++) { |
| 1089 | u64 pchbusy, pchg, piov, pnew; |
| 1090 | /* |
| 1091 | * Chip Errata: bug 6641; even and odd qwords>3 are swapped |
| 1092 | */ |
| 1093 | if (i > 3) { |
| 1094 | if (i & 1) |
| 1095 | piov = le64_to_cpu( |
| 1096 | dd->ipath_pioavailregs_dma[i - 1]); |
| 1097 | else |
| 1098 | piov = le64_to_cpu( |
| 1099 | dd->ipath_pioavailregs_dma[i + 1]); |
| 1100 | } else |
| 1101 | piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i]); |
| 1102 | pchg = _IPATH_ALL_CHECKBITS & |
| 1103 | ~(dd->ipath_pioavailshadow[i] ^ piov); |
| 1104 | pchbusy = pchg << INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT; |
| 1105 | if (pchg && (pchbusy & dd->ipath_pioavailshadow[i])) { |
| 1106 | pnew = dd->ipath_pioavailshadow[i] & ~pchbusy; |
| 1107 | pnew |= piov & pchbusy; |
| 1108 | dd->ipath_pioavailshadow[i] = pnew; |
| 1109 | } |
| 1110 | } |
| 1111 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
| 1112 | } |
| 1113 | |
| 1114 | /** |
| 1115 | * ipath_setrcvhdrsize - set the receive header size |
| 1116 | * @dd: the infinipath device |
| 1117 | * @rhdrsize: the receive header size |
| 1118 | * |
| 1119 | * called from user init code, and also layered driver init |
| 1120 | */ |
| 1121 | int ipath_setrcvhdrsize(struct ipath_devdata *dd, unsigned rhdrsize) |
| 1122 | { |
| 1123 | int ret = 0; |
| 1124 | |
| 1125 | if (dd->ipath_flags & IPATH_RCVHDRSZ_SET) { |
| 1126 | if (dd->ipath_rcvhdrsize != rhdrsize) { |
| 1127 | dev_info(&dd->pcidev->dev, |
| 1128 | "Error: can't set protocol header " |
| 1129 | "size %u, already %u\n", |
| 1130 | rhdrsize, dd->ipath_rcvhdrsize); |
| 1131 | ret = -EAGAIN; |
| 1132 | } else |
| 1133 | ipath_cdbg(VERBOSE, "Reuse same protocol header " |
| 1134 | "size %u\n", dd->ipath_rcvhdrsize); |
| 1135 | } else if (rhdrsize > (dd->ipath_rcvhdrentsize - |
| 1136 | (sizeof(u64) / sizeof(u32)))) { |
| 1137 | ipath_dbg("Error: can't set protocol header size %u " |
| 1138 | "(> max %u)\n", rhdrsize, |
| 1139 | dd->ipath_rcvhdrentsize - |
| 1140 | (u32) (sizeof(u64) / sizeof(u32))); |
| 1141 | ret = -EOVERFLOW; |
| 1142 | } else { |
| 1143 | dd->ipath_flags |= IPATH_RCVHDRSZ_SET; |
| 1144 | dd->ipath_rcvhdrsize = rhdrsize; |
| 1145 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize, |
| 1146 | dd->ipath_rcvhdrsize); |
| 1147 | ipath_cdbg(VERBOSE, "Set protocol header size to %u\n", |
| 1148 | dd->ipath_rcvhdrsize); |
| 1149 | } |
| 1150 | return ret; |
| 1151 | } |
| 1152 | |
| 1153 | /** |
| 1154 | * ipath_getpiobuf - find an available pio buffer |
| 1155 | * @dd: the infinipath device |
| 1156 | * @pbufnum: the buffer number is placed here |
| 1157 | * |
| 1158 | * do appropriate marking as busy, etc. |
| 1159 | * returns buffer number if one found (>=0), negative number is error. |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 1160 | * Used by ipath_layer_send |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1161 | */ |
| 1162 | u32 __iomem *ipath_getpiobuf(struct ipath_devdata *dd, u32 * pbufnum) |
| 1163 | { |
| 1164 | int i, j, starti, updated = 0; |
| 1165 | unsigned piobcnt, iter; |
| 1166 | unsigned long flags; |
| 1167 | unsigned long *shadow = dd->ipath_pioavailshadow; |
| 1168 | u32 __iomem *buf; |
| 1169 | |
| 1170 | piobcnt = (unsigned)(dd->ipath_piobcnt2k |
| 1171 | + dd->ipath_piobcnt4k); |
| 1172 | starti = dd->ipath_lastport_piobuf; |
| 1173 | iter = piobcnt - starti; |
| 1174 | if (dd->ipath_upd_pio_shadow) { |
| 1175 | /* |
| 1176 | * Minor optimization. If we had no buffers on last call, |
| 1177 | * start out by doing the update; continue and do scan even |
| 1178 | * if no buffers were updated, to be paranoid |
| 1179 | */ |
| 1180 | ipath_update_pio_bufs(dd); |
| 1181 | /* we scanned here, don't do it at end of scan */ |
| 1182 | updated = 1; |
| 1183 | i = starti; |
| 1184 | } else |
| 1185 | i = dd->ipath_lastpioindex; |
| 1186 | |
| 1187 | rescan: |
| 1188 | /* |
| 1189 | * while test_and_set_bit() is atomic, we do that and then the |
| 1190 | * change_bit(), and the pair is not. See if this is the cause |
| 1191 | * of the remaining armlaunch errors. |
| 1192 | */ |
| 1193 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
| 1194 | for (j = 0; j < iter; j++, i++) { |
| 1195 | if (i >= piobcnt) |
| 1196 | i = starti; |
| 1197 | /* |
| 1198 | * To avoid bus lock overhead, we first find a candidate |
| 1199 | * buffer, then do the test and set, and continue if that |
| 1200 | * fails. |
| 1201 | */ |
| 1202 | if (test_bit((2 * i) + 1, shadow) || |
| 1203 | test_and_set_bit((2 * i) + 1, shadow)) |
| 1204 | continue; |
| 1205 | /* flip generation bit */ |
| 1206 | change_bit(2 * i, shadow); |
| 1207 | break; |
| 1208 | } |
| 1209 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
| 1210 | |
| 1211 | if (j == iter) { |
| 1212 | volatile __le64 *dma = dd->ipath_pioavailregs_dma; |
| 1213 | |
| 1214 | /* |
| 1215 | * first time through; shadow exhausted, but may be real |
| 1216 | * buffers available, so go see; if any updated, rescan |
| 1217 | * (once) |
| 1218 | */ |
| 1219 | if (!updated) { |
| 1220 | ipath_update_pio_bufs(dd); |
| 1221 | updated = 1; |
| 1222 | i = starti; |
| 1223 | goto rescan; |
| 1224 | } |
| 1225 | dd->ipath_upd_pio_shadow = 1; |
| 1226 | /* |
| 1227 | * not atomic, but if we lose one once in a while, that's OK |
| 1228 | */ |
| 1229 | ipath_stats.sps_nopiobufs++; |
| 1230 | if (!(++dd->ipath_consec_nopiobuf % 100000)) { |
| 1231 | ipath_dbg( |
| 1232 | "%u pio sends with no bufavail; dmacopy: " |
| 1233 | "%llx %llx %llx %llx; shadow: " |
| 1234 | "%lx %lx %lx %lx\n", |
| 1235 | dd->ipath_consec_nopiobuf, |
| 1236 | (unsigned long long) le64_to_cpu(dma[0]), |
| 1237 | (unsigned long long) le64_to_cpu(dma[1]), |
| 1238 | (unsigned long long) le64_to_cpu(dma[2]), |
| 1239 | (unsigned long long) le64_to_cpu(dma[3]), |
| 1240 | shadow[0], shadow[1], shadow[2], |
| 1241 | shadow[3]); |
| 1242 | /* |
| 1243 | * 4 buffers per byte, 4 registers above, cover rest |
| 1244 | * below |
| 1245 | */ |
| 1246 | if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) > |
| 1247 | (sizeof(shadow[0]) * 4 * 4)) |
| 1248 | ipath_dbg("2nd group: dmacopy: %llx %llx " |
| 1249 | "%llx %llx; shadow: %lx %lx " |
| 1250 | "%lx %lx\n", |
| 1251 | (unsigned long long) |
| 1252 | le64_to_cpu(dma[4]), |
| 1253 | (unsigned long long) |
| 1254 | le64_to_cpu(dma[5]), |
| 1255 | (unsigned long long) |
| 1256 | le64_to_cpu(dma[6]), |
| 1257 | (unsigned long long) |
| 1258 | le64_to_cpu(dma[7]), |
| 1259 | shadow[4], shadow[5], |
| 1260 | shadow[6], shadow[7]); |
| 1261 | } |
| 1262 | buf = NULL; |
| 1263 | goto bail; |
| 1264 | } |
| 1265 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1266 | /* |
| 1267 | * set next starting place. Since it's just an optimization, |
| 1268 | * it doesn't matter who wins on this, so no locking |
| 1269 | */ |
| 1270 | dd->ipath_lastpioindex = i + 1; |
| 1271 | if (dd->ipath_upd_pio_shadow) |
| 1272 | dd->ipath_upd_pio_shadow = 0; |
| 1273 | if (dd->ipath_consec_nopiobuf) |
| 1274 | dd->ipath_consec_nopiobuf = 0; |
| 1275 | if (i < dd->ipath_piobcnt2k) |
| 1276 | buf = (u32 __iomem *) (dd->ipath_pio2kbase + |
| 1277 | i * dd->ipath_palign); |
| 1278 | else |
| 1279 | buf = (u32 __iomem *) |
| 1280 | (dd->ipath_pio4kbase + |
| 1281 | (i - dd->ipath_piobcnt2k) * dd->ipath_4kalign); |
| 1282 | ipath_cdbg(VERBOSE, "Return piobuf%u %uk @ %p\n", |
| 1283 | i, (i < dd->ipath_piobcnt2k) ? 2 : 4, buf); |
| 1284 | if (pbufnum) |
| 1285 | *pbufnum = i; |
| 1286 | |
| 1287 | bail: |
| 1288 | return buf; |
| 1289 | } |
| 1290 | |
| 1291 | /** |
| 1292 | * ipath_create_rcvhdrq - create a receive header queue |
| 1293 | * @dd: the infinipath device |
| 1294 | * @pd: the port data |
| 1295 | * |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1296 | * this must be contiguous memory (from an i/o perspective), and must be |
| 1297 | * DMA'able (which means for some systems, it will go through an IOMMU, |
| 1298 | * or be forced into a low address range). |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1299 | */ |
| 1300 | int ipath_create_rcvhdrq(struct ipath_devdata *dd, |
| 1301 | struct ipath_portdata *pd) |
| 1302 | { |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1303 | int ret = 0; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1304 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1305 | if (!pd->port_rcvhdrq) { |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1306 | dma_addr_t phys_hdrqtail; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1307 | gfp_t gfp_flags = GFP_USER | __GFP_COMP; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1308 | int amt = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * |
| 1309 | sizeof(u32), PAGE_SIZE); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1310 | |
| 1311 | pd->port_rcvhdrq = dma_alloc_coherent( |
| 1312 | &dd->pcidev->dev, amt, &pd->port_rcvhdrq_phys, |
| 1313 | gfp_flags); |
| 1314 | |
| 1315 | if (!pd->port_rcvhdrq) { |
| 1316 | ipath_dev_err(dd, "attempt to allocate %d bytes " |
| 1317 | "for port %u rcvhdrq failed\n", |
| 1318 | amt, pd->port_port); |
| 1319 | ret = -ENOMEM; |
| 1320 | goto bail; |
| 1321 | } |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1322 | pd->port_rcvhdrtail_kvaddr = dma_alloc_coherent( |
| 1323 | &dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail, GFP_KERNEL); |
| 1324 | if (!pd->port_rcvhdrtail_kvaddr) { |
| 1325 | ipath_dev_err(dd, "attempt to allocate 1 page " |
| 1326 | "for port %u rcvhdrqtailaddr failed\n", |
| 1327 | pd->port_port); |
| 1328 | ret = -ENOMEM; |
| 1329 | goto bail; |
| 1330 | } |
| 1331 | pd->port_rcvhdrqtailaddr_phys = phys_hdrqtail; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1332 | |
| 1333 | pd->port_rcvhdrq_size = amt; |
| 1334 | |
| 1335 | ipath_cdbg(VERBOSE, "%d pages at %p (phys %lx) size=%lu " |
| 1336 | "for port %u rcvhdr Q\n", |
| 1337 | amt >> PAGE_SHIFT, pd->port_rcvhdrq, |
| 1338 | (unsigned long) pd->port_rcvhdrq_phys, |
| 1339 | (unsigned long) pd->port_rcvhdrq_size, |
| 1340 | pd->port_port); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1341 | |
| 1342 | ipath_cdbg(VERBOSE, "port %d hdrtailaddr, %llx physical\n", |
| 1343 | pd->port_port, |
| 1344 | (unsigned long long) phys_hdrqtail); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1345 | } |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1346 | else |
| 1347 | ipath_cdbg(VERBOSE, "reuse port %d rcvhdrq @%p %llx phys; " |
| 1348 | "hdrtailaddr@%p %llx physical\n", |
| 1349 | pd->port_port, pd->port_rcvhdrq, |
| 1350 | pd->port_rcvhdrq_phys, pd->port_rcvhdrtail_kvaddr, |
| 1351 | (unsigned long long)pd->port_rcvhdrqtailaddr_phys); |
| 1352 | |
| 1353 | /* clear for security and sanity on each use */ |
| 1354 | memset(pd->port_rcvhdrq, 0, pd->port_rcvhdrq_size); |
| 1355 | memset((void *)pd->port_rcvhdrtail_kvaddr, 0, PAGE_SIZE); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1356 | |
| 1357 | /* |
| 1358 | * tell chip each time we init it, even if we are re-using previous |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1359 | * memory (we zero the register at process close) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1360 | */ |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1361 | ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdrtailaddr, |
| 1362 | pd->port_port, pd->port_rcvhdrqtailaddr_phys); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1363 | ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, |
| 1364 | pd->port_port, pd->port_rcvhdrq_phys); |
| 1365 | |
| 1366 | ret = 0; |
| 1367 | bail: |
| 1368 | return ret; |
| 1369 | } |
| 1370 | |
| 1371 | int ipath_waitfor_complete(struct ipath_devdata *dd, ipath_kreg reg_id, |
| 1372 | u64 bits_to_wait_for, u64 * valp) |
| 1373 | { |
| 1374 | unsigned long timeout; |
| 1375 | u64 lastval, val; |
| 1376 | int ret; |
| 1377 | |
| 1378 | lastval = ipath_read_kreg64(dd, reg_id); |
| 1379 | /* wait a ridiculously long time */ |
| 1380 | timeout = jiffies + msecs_to_jiffies(5); |
| 1381 | do { |
| 1382 | val = ipath_read_kreg64(dd, reg_id); |
| 1383 | /* set so they have something, even on failures. */ |
| 1384 | *valp = val; |
| 1385 | if ((val & bits_to_wait_for) == bits_to_wait_for) { |
| 1386 | ret = 0; |
| 1387 | break; |
| 1388 | } |
| 1389 | if (val != lastval) |
| 1390 | ipath_cdbg(VERBOSE, "Changed from %llx to %llx, " |
| 1391 | "waiting for %llx bits\n", |
| 1392 | (unsigned long long) lastval, |
| 1393 | (unsigned long long) val, |
| 1394 | (unsigned long long) bits_to_wait_for); |
| 1395 | cond_resched(); |
| 1396 | if (time_after(jiffies, timeout)) { |
| 1397 | ipath_dbg("Didn't get bits %llx in register 0x%x, " |
| 1398 | "got %llx\n", |
| 1399 | (unsigned long long) bits_to_wait_for, |
| 1400 | reg_id, (unsigned long long) *valp); |
| 1401 | ret = -ENODEV; |
| 1402 | break; |
| 1403 | } |
| 1404 | } while (1); |
| 1405 | |
| 1406 | return ret; |
| 1407 | } |
| 1408 | |
| 1409 | /** |
| 1410 | * ipath_waitfor_mdio_cmdready - wait for last command to complete |
| 1411 | * @dd: the infinipath device |
| 1412 | * |
| 1413 | * Like ipath_waitfor_complete(), but we wait for the CMDVALID bit to go |
| 1414 | * away indicating the last command has completed. It doesn't return data |
| 1415 | */ |
| 1416 | int ipath_waitfor_mdio_cmdready(struct ipath_devdata *dd) |
| 1417 | { |
| 1418 | unsigned long timeout; |
| 1419 | u64 val; |
| 1420 | int ret; |
| 1421 | |
| 1422 | /* wait a ridiculously long time */ |
| 1423 | timeout = jiffies + msecs_to_jiffies(5); |
| 1424 | do { |
| 1425 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_mdio); |
| 1426 | if (!(val & IPATH_MDIO_CMDVALID)) { |
| 1427 | ret = 0; |
| 1428 | break; |
| 1429 | } |
| 1430 | cond_resched(); |
| 1431 | if (time_after(jiffies, timeout)) { |
| 1432 | ipath_dbg("CMDVALID stuck in mdio reg? (%llx)\n", |
| 1433 | (unsigned long long) val); |
| 1434 | ret = -ENODEV; |
| 1435 | break; |
| 1436 | } |
| 1437 | } while (1); |
| 1438 | |
| 1439 | return ret; |
| 1440 | } |
| 1441 | |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 1442 | static void ipath_set_ib_lstate(struct ipath_devdata *dd, int which) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1443 | { |
| 1444 | static const char *what[4] = { |
| 1445 | [0] = "DOWN", |
| 1446 | [INFINIPATH_IBCC_LINKCMD_INIT] = "INIT", |
| 1447 | [INFINIPATH_IBCC_LINKCMD_ARMED] = "ARMED", |
| 1448 | [INFINIPATH_IBCC_LINKCMD_ACTIVE] = "ACTIVE" |
| 1449 | }; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1450 | int linkcmd = (which >> INFINIPATH_IBCC_LINKCMD_SHIFT) & |
| 1451 | INFINIPATH_IBCC_LINKCMD_MASK; |
| 1452 | |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 1453 | ipath_cdbg(VERBOSE, "Trying to move unit %u to %s, current ltstate " |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1454 | "is %s\n", dd->ipath_unit, |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1455 | what[linkcmd], |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1456 | ipath_ibcstatus_str[ |
| 1457 | (ipath_read_kreg64 |
| 1458 | (dd, dd->ipath_kregs->kr_ibcstatus) >> |
| 1459 | INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) & |
| 1460 | INFINIPATH_IBCS_LINKTRAININGSTATE_MASK]); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1461 | /* flush all queued sends when going to DOWN or INIT, to be sure that |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 1462 | * they don't block MAD packets */ |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1463 | if (!linkcmd || linkcmd == INFINIPATH_IBCC_LINKCMD_INIT) { |
| 1464 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 1465 | INFINIPATH_S_ABORT); |
| 1466 | ipath_disarm_piobufs(dd, dd->ipath_lastport_piobuf, |
| 1467 | (unsigned)(dd->ipath_piobcnt2k + |
| 1468 | dd->ipath_piobcnt4k) - |
| 1469 | dd->ipath_lastport_piobuf); |
| 1470 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1471 | |
| 1472 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, |
| 1473 | dd->ipath_ibcctrl | which); |
| 1474 | } |
| 1475 | |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 1476 | int ipath_set_linkstate(struct ipath_devdata *dd, u8 newstate) |
| 1477 | { |
| 1478 | u32 lstate; |
| 1479 | int ret; |
| 1480 | |
| 1481 | switch (newstate) { |
| 1482 | case IPATH_IB_LINKDOWN: |
| 1483 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_POLL << |
| 1484 | INFINIPATH_IBCC_LINKINITCMD_SHIFT); |
| 1485 | /* don't wait */ |
| 1486 | ret = 0; |
| 1487 | goto bail; |
| 1488 | |
| 1489 | case IPATH_IB_LINKDOWN_SLEEP: |
| 1490 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_SLEEP << |
| 1491 | INFINIPATH_IBCC_LINKINITCMD_SHIFT); |
| 1492 | /* don't wait */ |
| 1493 | ret = 0; |
| 1494 | goto bail; |
| 1495 | |
| 1496 | case IPATH_IB_LINKDOWN_DISABLE: |
| 1497 | ipath_set_ib_lstate(dd, |
| 1498 | INFINIPATH_IBCC_LINKINITCMD_DISABLE << |
| 1499 | INFINIPATH_IBCC_LINKINITCMD_SHIFT); |
| 1500 | /* don't wait */ |
| 1501 | ret = 0; |
| 1502 | goto bail; |
| 1503 | |
| 1504 | case IPATH_IB_LINKINIT: |
| 1505 | if (dd->ipath_flags & IPATH_LINKINIT) { |
| 1506 | ret = 0; |
| 1507 | goto bail; |
| 1508 | } |
| 1509 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_INIT << |
| 1510 | INFINIPATH_IBCC_LINKCMD_SHIFT); |
| 1511 | lstate = IPATH_LINKINIT; |
| 1512 | break; |
| 1513 | |
| 1514 | case IPATH_IB_LINKARM: |
| 1515 | if (dd->ipath_flags & IPATH_LINKARMED) { |
| 1516 | ret = 0; |
| 1517 | goto bail; |
| 1518 | } |
| 1519 | if (!(dd->ipath_flags & |
| 1520 | (IPATH_LINKINIT | IPATH_LINKACTIVE))) { |
| 1521 | ret = -EINVAL; |
| 1522 | goto bail; |
| 1523 | } |
| 1524 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ARMED << |
| 1525 | INFINIPATH_IBCC_LINKCMD_SHIFT); |
| 1526 | /* |
| 1527 | * Since the port can transition to ACTIVE by receiving |
| 1528 | * a non VL 15 packet, wait for either state. |
| 1529 | */ |
| 1530 | lstate = IPATH_LINKARMED | IPATH_LINKACTIVE; |
| 1531 | break; |
| 1532 | |
| 1533 | case IPATH_IB_LINKACTIVE: |
| 1534 | if (dd->ipath_flags & IPATH_LINKACTIVE) { |
| 1535 | ret = 0; |
| 1536 | goto bail; |
| 1537 | } |
| 1538 | if (!(dd->ipath_flags & IPATH_LINKARMED)) { |
| 1539 | ret = -EINVAL; |
| 1540 | goto bail; |
| 1541 | } |
| 1542 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ACTIVE << |
| 1543 | INFINIPATH_IBCC_LINKCMD_SHIFT); |
| 1544 | lstate = IPATH_LINKACTIVE; |
| 1545 | break; |
| 1546 | |
| 1547 | default: |
| 1548 | ipath_dbg("Invalid linkstate 0x%x requested\n", newstate); |
| 1549 | ret = -EINVAL; |
| 1550 | goto bail; |
| 1551 | } |
| 1552 | ret = ipath_wait_linkstate(dd, lstate, 2000); |
| 1553 | |
| 1554 | bail: |
| 1555 | return ret; |
| 1556 | } |
| 1557 | |
| 1558 | /** |
| 1559 | * ipath_set_mtu - set the MTU |
| 1560 | * @dd: the infinipath device |
| 1561 | * @arg: the new MTU |
| 1562 | * |
| 1563 | * we can handle "any" incoming size, the issue here is whether we |
| 1564 | * need to restrict our outgoing size. For now, we don't do any |
| 1565 | * sanity checking on this, and we don't deal with what happens to |
| 1566 | * programs that are already running when the size changes. |
| 1567 | * NOTE: changing the MTU will usually cause the IBC to go back to |
| 1568 | * link initialize (IPATH_IBSTATE_INIT) state... |
| 1569 | */ |
| 1570 | int ipath_set_mtu(struct ipath_devdata *dd, u16 arg) |
| 1571 | { |
| 1572 | u32 piosize; |
| 1573 | int changed = 0; |
| 1574 | int ret; |
| 1575 | |
| 1576 | /* |
| 1577 | * mtu is IB data payload max. It's the largest power of 2 less |
| 1578 | * than piosize (or even larger, since it only really controls the |
| 1579 | * largest we can receive; we can send the max of the mtu and |
| 1580 | * piosize). We check that it's one of the valid IB sizes. |
| 1581 | */ |
| 1582 | if (arg != 256 && arg != 512 && arg != 1024 && arg != 2048 && |
| 1583 | arg != 4096) { |
| 1584 | ipath_dbg("Trying to set invalid mtu %u, failing\n", arg); |
| 1585 | ret = -EINVAL; |
| 1586 | goto bail; |
| 1587 | } |
| 1588 | if (dd->ipath_ibmtu == arg) { |
| 1589 | ret = 0; /* same as current */ |
| 1590 | goto bail; |
| 1591 | } |
| 1592 | |
| 1593 | piosize = dd->ipath_ibmaxlen; |
| 1594 | dd->ipath_ibmtu = arg; |
| 1595 | |
| 1596 | if (arg >= (piosize - IPATH_PIO_MAXIBHDR)) { |
| 1597 | /* Only if it's not the initial value (or reset to it) */ |
| 1598 | if (piosize != dd->ipath_init_ibmaxlen) { |
| 1599 | dd->ipath_ibmaxlen = piosize; |
| 1600 | changed = 1; |
| 1601 | } |
| 1602 | } else if ((arg + IPATH_PIO_MAXIBHDR) != dd->ipath_ibmaxlen) { |
| 1603 | piosize = arg + IPATH_PIO_MAXIBHDR; |
| 1604 | ipath_cdbg(VERBOSE, "ibmaxlen was 0x%x, setting to 0x%x " |
| 1605 | "(mtu 0x%x)\n", dd->ipath_ibmaxlen, piosize, |
| 1606 | arg); |
| 1607 | dd->ipath_ibmaxlen = piosize; |
| 1608 | changed = 1; |
| 1609 | } |
| 1610 | |
| 1611 | if (changed) { |
| 1612 | /* |
| 1613 | * set the IBC maxpktlength to the size of our pio |
| 1614 | * buffers in words |
| 1615 | */ |
| 1616 | u64 ibc = dd->ipath_ibcctrl; |
| 1617 | ibc &= ~(INFINIPATH_IBCC_MAXPKTLEN_MASK << |
| 1618 | INFINIPATH_IBCC_MAXPKTLEN_SHIFT); |
| 1619 | |
| 1620 | piosize = piosize - 2 * sizeof(u32); /* ignore pbc */ |
| 1621 | dd->ipath_ibmaxlen = piosize; |
| 1622 | piosize /= sizeof(u32); /* in words */ |
| 1623 | /* |
| 1624 | * for ICRC, which we only send in diag test pkt mode, and |
| 1625 | * we don't need to worry about that for mtu |
| 1626 | */ |
| 1627 | piosize += 1; |
| 1628 | |
| 1629 | ibc |= piosize << INFINIPATH_IBCC_MAXPKTLEN_SHIFT; |
| 1630 | dd->ipath_ibcctrl = ibc; |
| 1631 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, |
| 1632 | dd->ipath_ibcctrl); |
| 1633 | dd->ipath_f_tidtemplate(dd); |
| 1634 | } |
| 1635 | |
| 1636 | ret = 0; |
| 1637 | |
| 1638 | bail: |
| 1639 | return ret; |
| 1640 | } |
| 1641 | |
| 1642 | int ipath_set_lid(struct ipath_devdata *dd, u32 arg, u8 lmc) |
| 1643 | { |
| 1644 | dd->ipath_lid = arg; |
| 1645 | dd->ipath_lmc = lmc; |
| 1646 | |
| 1647 | return 0; |
| 1648 | } |
| 1649 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1650 | /** |
| 1651 | * ipath_read_kreg64_port - read a device's per-port 64-bit kernel register |
| 1652 | * @dd: the infinipath device |
| 1653 | * @regno: the register number to read |
| 1654 | * @port: the port containing the register |
| 1655 | * |
| 1656 | * Registers that vary with the chip implementation constants (port) |
| 1657 | * use this routine. |
| 1658 | */ |
| 1659 | u64 ipath_read_kreg64_port(const struct ipath_devdata *dd, ipath_kreg regno, |
| 1660 | unsigned port) |
| 1661 | { |
| 1662 | u16 where; |
| 1663 | |
| 1664 | if (port < dd->ipath_portcnt && |
| 1665 | (regno == dd->ipath_kregs->kr_rcvhdraddr || |
| 1666 | regno == dd->ipath_kregs->kr_rcvhdrtailaddr)) |
| 1667 | where = regno + port; |
| 1668 | else |
| 1669 | where = -1; |
| 1670 | |
| 1671 | return ipath_read_kreg64(dd, where); |
| 1672 | } |
| 1673 | |
| 1674 | /** |
| 1675 | * ipath_write_kreg_port - write a device's per-port 64-bit kernel register |
| 1676 | * @dd: the infinipath device |
| 1677 | * @regno: the register number to write |
| 1678 | * @port: the port containing the register |
| 1679 | * @value: the value to write |
| 1680 | * |
| 1681 | * Registers that vary with the chip implementation constants (port) |
| 1682 | * use this routine. |
| 1683 | */ |
| 1684 | void ipath_write_kreg_port(const struct ipath_devdata *dd, ipath_kreg regno, |
| 1685 | unsigned port, u64 value) |
| 1686 | { |
| 1687 | u16 where; |
| 1688 | |
| 1689 | if (port < dd->ipath_portcnt && |
| 1690 | (regno == dd->ipath_kregs->kr_rcvhdraddr || |
| 1691 | regno == dd->ipath_kregs->kr_rcvhdrtailaddr)) |
| 1692 | where = regno + port; |
| 1693 | else |
| 1694 | where = -1; |
| 1695 | |
| 1696 | ipath_write_kreg(dd, where, value); |
| 1697 | } |
| 1698 | |
| 1699 | /** |
| 1700 | * ipath_shutdown_device - shut down a device |
| 1701 | * @dd: the infinipath device |
| 1702 | * |
| 1703 | * This is called to make the device quiet when we are about to |
| 1704 | * unload the driver, and also when the device is administratively |
| 1705 | * disabled. It does not free any data structures. |
| 1706 | * Everything it does has to be setup again by ipath_init_chip(dd,1) |
| 1707 | */ |
| 1708 | void ipath_shutdown_device(struct ipath_devdata *dd) |
| 1709 | { |
| 1710 | u64 val; |
| 1711 | |
| 1712 | ipath_dbg("Shutting down the device\n"); |
| 1713 | |
| 1714 | dd->ipath_flags |= IPATH_LINKUNK; |
| 1715 | dd->ipath_flags &= ~(IPATH_INITTED | IPATH_LINKDOWN | |
| 1716 | IPATH_LINKINIT | IPATH_LINKARMED | |
| 1717 | IPATH_LINKACTIVE); |
| 1718 | *dd->ipath_statusp &= ~(IPATH_STATUS_IB_CONF | |
| 1719 | IPATH_STATUS_IB_READY); |
| 1720 | |
| 1721 | /* mask interrupts, but not errors */ |
| 1722 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); |
| 1723 | |
| 1724 | dd->ipath_rcvctrl = 0; |
| 1725 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, |
| 1726 | dd->ipath_rcvctrl); |
| 1727 | |
| 1728 | /* |
| 1729 | * gracefully stop all sends allowing any in progress to trickle out |
| 1730 | * first. |
| 1731 | */ |
| 1732 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 0ULL); |
| 1733 | /* flush it */ |
| 1734 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 1735 | /* |
| 1736 | * enough for anything that's going to trickle out to have actually |
| 1737 | * done so. |
| 1738 | */ |
| 1739 | udelay(5); |
| 1740 | |
| 1741 | /* |
| 1742 | * abort any armed or launched PIO buffers that didn't go. (self |
| 1743 | * clearing). Will cause any packet currently being transmitted to |
| 1744 | * go out with an EBP, and may also cause a short packet error on |
| 1745 | * the receiver. |
| 1746 | */ |
| 1747 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 1748 | INFINIPATH_S_ABORT); |
| 1749 | |
| 1750 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_DISABLE << |
| 1751 | INFINIPATH_IBCC_LINKINITCMD_SHIFT); |
| 1752 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1753 | /* disable IBC */ |
| 1754 | dd->ipath_control &= ~INFINIPATH_C_LINKENABLE; |
| 1755 | ipath_write_kreg(dd, dd->ipath_kregs->kr_control, |
Bryan O'Sullivan | a40f55f | 2006-07-01 04:36:00 -0700 | [diff] [blame] | 1756 | dd->ipath_control | INFINIPATH_C_FREEZEMODE); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1757 | |
| 1758 | /* |
| 1759 | * clear SerdesEnable and turn the leds off; do this here because |
| 1760 | * we are unloading, so don't count on interrupts to move along |
| 1761 | * Turn the LEDs off explictly for the same reason. |
| 1762 | */ |
| 1763 | dd->ipath_f_quiet_serdes(dd); |
| 1764 | dd->ipath_f_setextled(dd, 0, 0); |
| 1765 | |
| 1766 | if (dd->ipath_stats_timer_active) { |
| 1767 | del_timer_sync(&dd->ipath_stats_timer); |
| 1768 | dd->ipath_stats_timer_active = 0; |
| 1769 | } |
| 1770 | |
| 1771 | /* |
| 1772 | * clear all interrupts and errors, so that the next time the driver |
| 1773 | * is loaded or device is enabled, we know that whatever is set |
| 1774 | * happened while we were unloaded |
| 1775 | */ |
| 1776 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, |
| 1777 | ~0ULL & ~INFINIPATH_HWE_MEMBISTFAILED); |
| 1778 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL); |
| 1779 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL); |
| 1780 | } |
| 1781 | |
| 1782 | /** |
| 1783 | * ipath_free_pddata - free a port's allocated data |
| 1784 | * @dd: the infinipath device |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1785 | * @pd: the portdata structure |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1786 | * |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1787 | * free up any allocated data for a port |
| 1788 | * This should not touch anything that would affect a simultaneous |
| 1789 | * re-allocation of port data, because it is called after ipath_mutex |
| 1790 | * is released (and can be called from reinit as well). |
| 1791 | * It should never change any chip state, or global driver state. |
| 1792 | * (The only exception to global state is freeing the port0 port0_skbs.) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1793 | */ |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1794 | void ipath_free_pddata(struct ipath_devdata *dd, struct ipath_portdata *pd) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1795 | { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1796 | if (!pd) |
| 1797 | return; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1798 | |
| 1799 | if (pd->port_rcvhdrq) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1800 | ipath_cdbg(VERBOSE, "free closed port %d rcvhdrq @ %p " |
| 1801 | "(size=%lu)\n", pd->port_port, pd->port_rcvhdrq, |
| 1802 | (unsigned long) pd->port_rcvhdrq_size); |
| 1803 | dma_free_coherent(&dd->pcidev->dev, pd->port_rcvhdrq_size, |
| 1804 | pd->port_rcvhdrq, pd->port_rcvhdrq_phys); |
| 1805 | pd->port_rcvhdrq = NULL; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1806 | if (pd->port_rcvhdrtail_kvaddr) { |
| 1807 | dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE, |
| 1808 | (void *)pd->port_rcvhdrtail_kvaddr, |
| 1809 | pd->port_rcvhdrqtailaddr_phys); |
| 1810 | pd->port_rcvhdrtail_kvaddr = NULL; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1811 | } |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1812 | } |
| 1813 | if (pd->port_port && pd->port_rcvegrbuf) { |
| 1814 | unsigned e; |
| 1815 | |
| 1816 | for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { |
| 1817 | void *base = pd->port_rcvegrbuf[e]; |
| 1818 | size_t size = pd->port_rcvegrbuf_size; |
| 1819 | |
| 1820 | ipath_cdbg(VERBOSE, "egrbuf free(%p, %lu), " |
| 1821 | "chunk %u/%u\n", base, |
| 1822 | (unsigned long) size, |
| 1823 | e, pd->port_rcvegrbuf_chunks); |
| 1824 | dma_free_coherent(&dd->pcidev->dev, size, |
| 1825 | base, pd->port_rcvegrbuf_phys[e]); |
| 1826 | } |
| 1827 | vfree(pd->port_rcvegrbuf); |
| 1828 | pd->port_rcvegrbuf = NULL; |
| 1829 | vfree(pd->port_rcvegrbuf_phys); |
| 1830 | pd->port_rcvegrbuf_phys = NULL; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1831 | pd->port_rcvegrbuf_chunks = 0; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1832 | } else if (pd->port_port == 0 && dd->ipath_port0_skbs) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1833 | unsigned e; |
| 1834 | struct sk_buff **skbs = dd->ipath_port0_skbs; |
| 1835 | |
| 1836 | dd->ipath_port0_skbs = NULL; |
| 1837 | ipath_cdbg(VERBOSE, "free closed port %d ipath_port0_skbs " |
| 1838 | "@ %p\n", pd->port_port, skbs); |
| 1839 | for (e = 0; e < dd->ipath_rcvegrcnt; e++) |
| 1840 | if (skbs[e]) |
| 1841 | dev_kfree_skb(skbs[e]); |
| 1842 | vfree(skbs); |
| 1843 | } |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1844 | kfree(pd->port_tid_pg_list); |
| 1845 | kfree(pd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1846 | } |
| 1847 | |
Roland Dreier | ac2ae4c | 2006-04-19 11:40:12 -0700 | [diff] [blame] | 1848 | static int __init infinipath_init(void) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1849 | { |
| 1850 | int ret; |
| 1851 | |
Bryan O'Sullivan | b55f4f0 | 2006-08-25 11:24:33 -0700 | [diff] [blame] | 1852 | ipath_dbg(KERN_INFO DRIVER_LOAD_MSG "%s", ib_ipath_version); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1853 | |
| 1854 | /* |
| 1855 | * These must be called before the driver is registered with |
| 1856 | * the PCI subsystem. |
| 1857 | */ |
| 1858 | idr_init(&unit_table); |
| 1859 | if (!idr_pre_get(&unit_table, GFP_KERNEL)) { |
| 1860 | ret = -ENOMEM; |
| 1861 | goto bail; |
| 1862 | } |
| 1863 | |
| 1864 | ret = pci_register_driver(&ipath_driver); |
| 1865 | if (ret < 0) { |
| 1866 | printk(KERN_ERR IPATH_DRV_NAME |
| 1867 | ": Unable to register driver: error %d\n", -ret); |
| 1868 | goto bail_unit; |
| 1869 | } |
| 1870 | |
| 1871 | ret = ipath_driver_create_group(&ipath_driver.driver); |
| 1872 | if (ret < 0) { |
| 1873 | printk(KERN_ERR IPATH_DRV_NAME ": Unable to create driver " |
| 1874 | "sysfs entries: error %d\n", -ret); |
| 1875 | goto bail_pci; |
| 1876 | } |
| 1877 | |
| 1878 | ret = ipath_init_ipathfs(); |
| 1879 | if (ret < 0) { |
| 1880 | printk(KERN_ERR IPATH_DRV_NAME ": Unable to create " |
| 1881 | "ipathfs: error %d\n", -ret); |
| 1882 | goto bail_group; |
| 1883 | } |
| 1884 | |
Bryan O'Sullivan | 98341f2 | 2006-08-25 11:24:36 -0700 | [diff] [blame] | 1885 | ret = ipath_diagpkt_add(); |
| 1886 | if (ret < 0) { |
| 1887 | printk(KERN_ERR IPATH_DRV_NAME ": Unable to create " |
| 1888 | "diag data device: error %d\n", -ret); |
| 1889 | goto bail_ipathfs; |
| 1890 | } |
| 1891 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1892 | goto bail; |
| 1893 | |
Bryan O'Sullivan | 98341f2 | 2006-08-25 11:24:36 -0700 | [diff] [blame] | 1894 | bail_ipathfs: |
| 1895 | ipath_exit_ipathfs(); |
| 1896 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1897 | bail_group: |
| 1898 | ipath_driver_remove_group(&ipath_driver.driver); |
| 1899 | |
| 1900 | bail_pci: |
| 1901 | pci_unregister_driver(&ipath_driver); |
| 1902 | |
| 1903 | bail_unit: |
| 1904 | idr_destroy(&unit_table); |
| 1905 | |
| 1906 | bail: |
| 1907 | return ret; |
| 1908 | } |
| 1909 | |
| 1910 | static void cleanup_device(struct ipath_devdata *dd) |
| 1911 | { |
| 1912 | int port; |
| 1913 | |
| 1914 | ipath_shutdown_device(dd); |
| 1915 | |
| 1916 | if (*dd->ipath_statusp & IPATH_STATUS_CHIP_PRESENT) { |
| 1917 | /* can't do anything more with chip; needs re-init */ |
| 1918 | *dd->ipath_statusp &= ~IPATH_STATUS_CHIP_PRESENT; |
| 1919 | if (dd->ipath_kregbase) { |
| 1920 | /* |
| 1921 | * if we haven't already cleaned up before these are |
| 1922 | * to ensure any register reads/writes "fail" until |
| 1923 | * re-init |
| 1924 | */ |
| 1925 | dd->ipath_kregbase = NULL; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1926 | dd->ipath_uregbase = 0; |
| 1927 | dd->ipath_sregbase = 0; |
| 1928 | dd->ipath_cregbase = 0; |
| 1929 | dd->ipath_kregsize = 0; |
| 1930 | } |
| 1931 | ipath_disable_wc(dd); |
| 1932 | } |
| 1933 | |
| 1934 | if (dd->ipath_pioavailregs_dma) { |
| 1935 | dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE, |
| 1936 | (void *) dd->ipath_pioavailregs_dma, |
| 1937 | dd->ipath_pioavailregs_phys); |
| 1938 | dd->ipath_pioavailregs_dma = NULL; |
| 1939 | } |
Bryan O'Sullivan | 35783ec | 2006-07-01 04:36:15 -0700 | [diff] [blame] | 1940 | if (dd->ipath_dummy_hdrq) { |
| 1941 | dma_free_coherent(&dd->pcidev->dev, |
| 1942 | dd->ipath_pd[0]->port_rcvhdrq_size, |
| 1943 | dd->ipath_dummy_hdrq, dd->ipath_dummy_hdrq_phys); |
| 1944 | dd->ipath_dummy_hdrq = NULL; |
| 1945 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1946 | |
| 1947 | if (dd->ipath_pageshadow) { |
| 1948 | struct page **tmpp = dd->ipath_pageshadow; |
| 1949 | int i, cnt = 0; |
| 1950 | |
| 1951 | ipath_cdbg(VERBOSE, "Unlocking any expTID pages still " |
| 1952 | "locked\n"); |
| 1953 | for (port = 0; port < dd->ipath_cfgports; port++) { |
| 1954 | int port_tidbase = port * dd->ipath_rcvtidcnt; |
| 1955 | int maxtid = port_tidbase + dd->ipath_rcvtidcnt; |
| 1956 | for (i = port_tidbase; i < maxtid; i++) { |
| 1957 | if (!tmpp[i]) |
| 1958 | continue; |
| 1959 | ipath_release_user_pages(&tmpp[i], 1); |
| 1960 | tmpp[i] = NULL; |
| 1961 | cnt++; |
| 1962 | } |
| 1963 | } |
| 1964 | if (cnt) { |
| 1965 | ipath_stats.sps_pageunlocks += cnt; |
| 1966 | ipath_cdbg(VERBOSE, "There were still %u expTID " |
| 1967 | "entries locked\n", cnt); |
| 1968 | } |
| 1969 | if (ipath_stats.sps_pagelocks || |
| 1970 | ipath_stats.sps_pageunlocks) |
| 1971 | ipath_cdbg(VERBOSE, "%llu pages locked, %llu " |
| 1972 | "unlocked via ipath_m{un}lock\n", |
| 1973 | (unsigned long long) |
| 1974 | ipath_stats.sps_pagelocks, |
| 1975 | (unsigned long long) |
| 1976 | ipath_stats.sps_pageunlocks); |
| 1977 | |
| 1978 | ipath_cdbg(VERBOSE, "Free shadow page tid array at %p\n", |
| 1979 | dd->ipath_pageshadow); |
| 1980 | vfree(dd->ipath_pageshadow); |
| 1981 | dd->ipath_pageshadow = NULL; |
| 1982 | } |
| 1983 | |
| 1984 | /* |
| 1985 | * free any resources still in use (usually just kernel ports) |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1986 | * at unload; we do for portcnt, not cfgports, because cfgports |
| 1987 | * could have changed while we were loaded. |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1988 | */ |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1989 | for (port = 0; port < dd->ipath_portcnt; port++) { |
| 1990 | struct ipath_portdata *pd = dd->ipath_pd[port]; |
| 1991 | dd->ipath_pd[port] = NULL; |
| 1992 | ipath_free_pddata(dd, pd); |
| 1993 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1994 | kfree(dd->ipath_pd); |
| 1995 | /* |
| 1996 | * debuggability, in case some cleanup path tries to use it |
| 1997 | * after this |
| 1998 | */ |
| 1999 | dd->ipath_pd = NULL; |
| 2000 | } |
| 2001 | |
| 2002 | static void __exit infinipath_cleanup(void) |
| 2003 | { |
| 2004 | struct ipath_devdata *dd, *tmp; |
| 2005 | unsigned long flags; |
| 2006 | |
Bryan O'Sullivan | 98341f2 | 2006-08-25 11:24:36 -0700 | [diff] [blame] | 2007 | ipath_diagpkt_remove(); |
| 2008 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2009 | ipath_exit_ipathfs(); |
| 2010 | |
| 2011 | ipath_driver_remove_group(&ipath_driver.driver); |
| 2012 | |
| 2013 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 2014 | |
| 2015 | /* |
| 2016 | * turn off rcv, send, and interrupts for all ports, all drivers |
| 2017 | * should also hard reset the chip here? |
| 2018 | * free up port 0 (kernel) rcvhdr, egr bufs, and eventually tid bufs |
| 2019 | * for all versions of the driver, if they were allocated |
| 2020 | */ |
| 2021 | list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) { |
| 2022 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 2023 | |
| 2024 | if (dd->ipath_kregbase) |
| 2025 | cleanup_device(dd); |
| 2026 | |
| 2027 | if (dd->pcidev) { |
| 2028 | if (dd->pcidev->irq) { |
| 2029 | ipath_cdbg(VERBOSE, |
| 2030 | "unit %u free_irq of irq %x\n", |
| 2031 | dd->ipath_unit, dd->pcidev->irq); |
| 2032 | free_irq(dd->pcidev->irq, dd); |
| 2033 | } else |
| 2034 | ipath_dbg("irq is 0, not doing free_irq " |
| 2035 | "for unit %u\n", dd->ipath_unit); |
Bryan O'Sullivan | b0ff7c2 | 2006-05-23 11:32:33 -0700 | [diff] [blame] | 2036 | |
| 2037 | /* |
| 2038 | * we check for NULL here, because it's outside |
| 2039 | * the kregbase check, and we need to call it |
| 2040 | * after the free_irq. Thus it's possible that |
| 2041 | * the function pointers were never initialized. |
| 2042 | */ |
| 2043 | if (dd->ipath_f_cleanup) |
| 2044 | /* clean up chip-specific stuff */ |
| 2045 | dd->ipath_f_cleanup(dd); |
| 2046 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2047 | dd->pcidev = NULL; |
| 2048 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2049 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 2050 | } |
| 2051 | |
| 2052 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 2053 | |
| 2054 | ipath_cdbg(VERBOSE, "Unregistering pci driver\n"); |
| 2055 | pci_unregister_driver(&ipath_driver); |
| 2056 | |
| 2057 | idr_destroy(&unit_table); |
| 2058 | } |
| 2059 | |
| 2060 | /** |
| 2061 | * ipath_reset_device - reset the chip if possible |
| 2062 | * @unit: the device to reset |
| 2063 | * |
| 2064 | * Whether or not reset is successful, we attempt to re-initialize the chip |
| 2065 | * (that is, much like a driver unload/reload). We clear the INITTED flag |
| 2066 | * so that the various entry points will fail until we reinitialize. For |
| 2067 | * now, we only allow this if no user ports are open that use chip resources |
| 2068 | */ |
| 2069 | int ipath_reset_device(int unit) |
| 2070 | { |
| 2071 | int ret, i; |
| 2072 | struct ipath_devdata *dd = ipath_lookup(unit); |
| 2073 | |
| 2074 | if (!dd) { |
| 2075 | ret = -ENODEV; |
| 2076 | goto bail; |
| 2077 | } |
| 2078 | |
| 2079 | dev_info(&dd->pcidev->dev, "Reset on unit %u requested\n", unit); |
| 2080 | |
| 2081 | if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) { |
| 2082 | dev_info(&dd->pcidev->dev, "Invalid unit number %u or " |
| 2083 | "not initialized or not present\n", unit); |
| 2084 | ret = -ENXIO; |
| 2085 | goto bail; |
| 2086 | } |
| 2087 | |
| 2088 | if (dd->ipath_pd) |
Bryan O'Sullivan | 23e86a4 | 2006-04-24 14:22:59 -0700 | [diff] [blame] | 2089 | for (i = 1; i < dd->ipath_cfgports; i++) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2090 | if (dd->ipath_pd[i] && dd->ipath_pd[i]->port_cnt) { |
| 2091 | ipath_dbg("unit %u port %d is in use " |
| 2092 | "(PID %u cmd %s), can't reset\n", |
| 2093 | unit, i, |
| 2094 | dd->ipath_pd[i]->port_pid, |
| 2095 | dd->ipath_pd[i]->port_comm); |
| 2096 | ret = -EBUSY; |
| 2097 | goto bail; |
| 2098 | } |
| 2099 | } |
| 2100 | |
| 2101 | dd->ipath_flags &= ~IPATH_INITTED; |
| 2102 | ret = dd->ipath_f_reset(dd); |
| 2103 | if (ret != 1) |
| 2104 | ipath_dbg("reset was not successful\n"); |
| 2105 | ipath_dbg("Trying to reinitialize unit %u after reset attempt\n", |
| 2106 | unit); |
| 2107 | ret = ipath_init_chip(dd, 1); |
| 2108 | if (ret) |
| 2109 | ipath_dev_err(dd, "Reinitialize unit %u after " |
| 2110 | "reset failed with %d\n", unit, ret); |
| 2111 | else |
| 2112 | dev_info(&dd->pcidev->dev, "Reinitialized unit %u after " |
| 2113 | "resetting\n", unit); |
| 2114 | |
| 2115 | bail: |
| 2116 | return ret; |
| 2117 | } |
| 2118 | |
| 2119 | module_init(infinipath_init); |
| 2120 | module_exit(infinipath_cleanup); |