Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | */ |
| 32 | |
| 33 | #include <linux/spinlock.h> |
| 34 | #include <linux/idr.h> |
| 35 | #include <linux/pci.h> |
| 36 | #include <linux/delay.h> |
| 37 | #include <linux/netdevice.h> |
| 38 | #include <linux/vmalloc.h> |
| 39 | |
| 40 | #include "ipath_kernel.h" |
| 41 | #include "ips_common.h" |
| 42 | #include "ipath_layer.h" |
| 43 | |
| 44 | static void ipath_update_pio_bufs(struct ipath_devdata *); |
| 45 | |
| 46 | const char *ipath_get_unit_name(int unit) |
| 47 | { |
| 48 | static char iname[16]; |
| 49 | snprintf(iname, sizeof iname, "infinipath%u", unit); |
| 50 | return iname; |
| 51 | } |
| 52 | |
| 53 | EXPORT_SYMBOL_GPL(ipath_get_unit_name); |
| 54 | |
| 55 | #define DRIVER_LOAD_MSG "PathScale " IPATH_DRV_NAME " loaded: " |
| 56 | #define PFX IPATH_DRV_NAME ": " |
| 57 | |
| 58 | /* |
| 59 | * The size has to be longer than this string, so we can append |
| 60 | * board/chip information to it in the init code. |
| 61 | */ |
| 62 | const char ipath_core_version[] = IPATH_IDSTR "\n"; |
| 63 | |
| 64 | static struct idr unit_table; |
| 65 | DEFINE_SPINLOCK(ipath_devs_lock); |
| 66 | LIST_HEAD(ipath_dev_list); |
| 67 | |
| 68 | wait_queue_head_t ipath_sma_state_wait; |
| 69 | |
| 70 | unsigned ipath_debug = __IPATH_INFO; |
| 71 | |
| 72 | module_param_named(debug, ipath_debug, uint, S_IWUSR | S_IRUGO); |
| 73 | MODULE_PARM_DESC(debug, "mask for debug prints"); |
| 74 | EXPORT_SYMBOL_GPL(ipath_debug); |
| 75 | |
| 76 | MODULE_LICENSE("GPL"); |
| 77 | MODULE_AUTHOR("PathScale <support@pathscale.com>"); |
| 78 | MODULE_DESCRIPTION("Pathscale InfiniPath driver"); |
| 79 | |
| 80 | const char *ipath_ibcstatus_str[] = { |
| 81 | "Disabled", |
| 82 | "LinkUp", |
| 83 | "PollActive", |
| 84 | "PollQuiet", |
| 85 | "SleepDelay", |
| 86 | "SleepQuiet", |
| 87 | "LState6", /* unused */ |
| 88 | "LState7", /* unused */ |
| 89 | "CfgDebounce", |
| 90 | "CfgRcvfCfg", |
| 91 | "CfgWaitRmt", |
| 92 | "CfgIdle", |
| 93 | "RecovRetrain", |
| 94 | "LState0xD", /* unused */ |
| 95 | "RecovWaitRmt", |
| 96 | "RecovIdle", |
| 97 | }; |
| 98 | |
| 99 | /* |
| 100 | * These variables are initialized in the chip-specific files |
| 101 | * but are defined here. |
| 102 | */ |
| 103 | u16 ipath_gpio_sda_num, ipath_gpio_scl_num; |
| 104 | u64 ipath_gpio_sda, ipath_gpio_scl; |
| 105 | u64 infinipath_i_bitsextant; |
| 106 | ipath_err_t infinipath_e_bitsextant, infinipath_hwe_bitsextant; |
| 107 | u32 infinipath_i_rcvavail_mask, infinipath_i_rcvurg_mask; |
| 108 | |
| 109 | static void __devexit ipath_remove_one(struct pci_dev *); |
| 110 | static int __devinit ipath_init_one(struct pci_dev *, |
| 111 | const struct pci_device_id *); |
| 112 | |
| 113 | /* Only needed for registration, nothing else needs this info */ |
| 114 | #define PCI_VENDOR_ID_PATHSCALE 0x1fc1 |
| 115 | #define PCI_DEVICE_ID_INFINIPATH_HT 0xd |
| 116 | #define PCI_DEVICE_ID_INFINIPATH_PE800 0x10 |
| 117 | |
| 118 | static const struct pci_device_id ipath_pci_tbl[] = { |
Roland Dreier | 6f4bb3d | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 119 | { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_HT) }, |
| 120 | { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_PE800) }, |
| 121 | { 0, } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 122 | }; |
| 123 | |
| 124 | MODULE_DEVICE_TABLE(pci, ipath_pci_tbl); |
| 125 | |
| 126 | static struct pci_driver ipath_driver = { |
| 127 | .name = IPATH_DRV_NAME, |
| 128 | .probe = ipath_init_one, |
| 129 | .remove = __devexit_p(ipath_remove_one), |
| 130 | .id_table = ipath_pci_tbl, |
| 131 | }; |
| 132 | |
| 133 | /* |
| 134 | * This is where port 0's rcvhdrtail register is written back; we also |
| 135 | * want nothing else sharing the cache line, so make it a cache line |
| 136 | * in size. Used for all units. |
| 137 | */ |
| 138 | volatile __le64 *ipath_port0_rcvhdrtail; |
| 139 | dma_addr_t ipath_port0_rcvhdrtail_dma; |
| 140 | static int port0_rcvhdrtail_refs; |
| 141 | |
| 142 | static inline void read_bars(struct ipath_devdata *dd, struct pci_dev *dev, |
| 143 | u32 *bar0, u32 *bar1) |
| 144 | { |
| 145 | int ret; |
| 146 | |
| 147 | ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, bar0); |
| 148 | if (ret) |
| 149 | ipath_dev_err(dd, "failed to read bar0 before enable: " |
| 150 | "error %d\n", -ret); |
| 151 | |
| 152 | ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, bar1); |
| 153 | if (ret) |
| 154 | ipath_dev_err(dd, "failed to read bar1 before enable: " |
| 155 | "error %d\n", -ret); |
| 156 | |
| 157 | ipath_dbg("Read bar0 %x bar1 %x\n", *bar0, *bar1); |
| 158 | } |
| 159 | |
| 160 | static void ipath_free_devdata(struct pci_dev *pdev, |
| 161 | struct ipath_devdata *dd) |
| 162 | { |
| 163 | unsigned long flags; |
| 164 | |
| 165 | pci_set_drvdata(pdev, NULL); |
| 166 | |
| 167 | if (dd->ipath_unit != -1) { |
| 168 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 169 | idr_remove(&unit_table, dd->ipath_unit); |
| 170 | list_del(&dd->ipath_list); |
| 171 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 172 | } |
| 173 | dma_free_coherent(&pdev->dev, sizeof(*dd), dd, dd->ipath_dma_addr); |
| 174 | } |
| 175 | |
| 176 | static struct ipath_devdata *ipath_alloc_devdata(struct pci_dev *pdev) |
| 177 | { |
| 178 | unsigned long flags; |
| 179 | struct ipath_devdata *dd; |
| 180 | dma_addr_t dma_addr; |
| 181 | int ret; |
| 182 | |
| 183 | if (!idr_pre_get(&unit_table, GFP_KERNEL)) { |
| 184 | dd = ERR_PTR(-ENOMEM); |
| 185 | goto bail; |
| 186 | } |
| 187 | |
| 188 | dd = dma_alloc_coherent(&pdev->dev, sizeof(*dd), &dma_addr, |
| 189 | GFP_KERNEL); |
| 190 | |
| 191 | if (!dd) { |
| 192 | dd = ERR_PTR(-ENOMEM); |
| 193 | goto bail; |
| 194 | } |
| 195 | |
| 196 | dd->ipath_dma_addr = dma_addr; |
| 197 | dd->ipath_unit = -1; |
| 198 | |
| 199 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 200 | |
| 201 | ret = idr_get_new(&unit_table, dd, &dd->ipath_unit); |
| 202 | if (ret < 0) { |
| 203 | printk(KERN_ERR IPATH_DRV_NAME |
| 204 | ": Could not allocate unit ID: error %d\n", -ret); |
| 205 | ipath_free_devdata(pdev, dd); |
| 206 | dd = ERR_PTR(ret); |
| 207 | goto bail_unlock; |
| 208 | } |
| 209 | |
| 210 | dd->pcidev = pdev; |
| 211 | pci_set_drvdata(pdev, dd); |
| 212 | |
| 213 | list_add(&dd->ipath_list, &ipath_dev_list); |
| 214 | |
| 215 | bail_unlock: |
| 216 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 217 | |
| 218 | bail: |
| 219 | return dd; |
| 220 | } |
| 221 | |
| 222 | static inline struct ipath_devdata *__ipath_lookup(int unit) |
| 223 | { |
| 224 | return idr_find(&unit_table, unit); |
| 225 | } |
| 226 | |
| 227 | struct ipath_devdata *ipath_lookup(int unit) |
| 228 | { |
| 229 | struct ipath_devdata *dd; |
| 230 | unsigned long flags; |
| 231 | |
| 232 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 233 | dd = __ipath_lookup(unit); |
| 234 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 235 | |
| 236 | return dd; |
| 237 | } |
| 238 | |
| 239 | int ipath_count_units(int *npresentp, int *nupp, u32 *maxportsp) |
| 240 | { |
| 241 | int nunits, npresent, nup; |
| 242 | struct ipath_devdata *dd; |
| 243 | unsigned long flags; |
| 244 | u32 maxports; |
| 245 | |
| 246 | nunits = npresent = nup = maxports = 0; |
| 247 | |
| 248 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 249 | |
| 250 | list_for_each_entry(dd, &ipath_dev_list, ipath_list) { |
| 251 | nunits++; |
| 252 | if ((dd->ipath_flags & IPATH_PRESENT) && dd->ipath_kregbase) |
| 253 | npresent++; |
| 254 | if (dd->ipath_lid && |
| 255 | !(dd->ipath_flags & (IPATH_DISABLED | IPATH_LINKDOWN |
| 256 | | IPATH_LINKUNK))) |
| 257 | nup++; |
| 258 | if (dd->ipath_cfgports > maxports) |
| 259 | maxports = dd->ipath_cfgports; |
| 260 | } |
| 261 | |
| 262 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 263 | |
| 264 | if (npresentp) |
| 265 | *npresentp = npresent; |
| 266 | if (nupp) |
| 267 | *nupp = nup; |
| 268 | if (maxportsp) |
| 269 | *maxportsp = maxports; |
| 270 | |
| 271 | return nunits; |
| 272 | } |
| 273 | |
| 274 | static int init_port0_rcvhdrtail(struct pci_dev *pdev) |
| 275 | { |
| 276 | int ret; |
| 277 | |
| 278 | mutex_lock(&ipath_mutex); |
| 279 | |
| 280 | if (!ipath_port0_rcvhdrtail) { |
| 281 | ipath_port0_rcvhdrtail = |
| 282 | dma_alloc_coherent(&pdev->dev, |
| 283 | IPATH_PORT0_RCVHDRTAIL_SIZE, |
| 284 | &ipath_port0_rcvhdrtail_dma, |
| 285 | GFP_KERNEL); |
| 286 | |
| 287 | if (!ipath_port0_rcvhdrtail) { |
| 288 | ret = -ENOMEM; |
| 289 | goto bail; |
| 290 | } |
| 291 | } |
| 292 | port0_rcvhdrtail_refs++; |
| 293 | ret = 0; |
| 294 | |
| 295 | bail: |
| 296 | mutex_unlock(&ipath_mutex); |
| 297 | |
| 298 | return ret; |
| 299 | } |
| 300 | |
| 301 | static void cleanup_port0_rcvhdrtail(struct pci_dev *pdev) |
| 302 | { |
| 303 | mutex_lock(&ipath_mutex); |
| 304 | |
| 305 | if (!--port0_rcvhdrtail_refs) { |
| 306 | dma_free_coherent(&pdev->dev, IPATH_PORT0_RCVHDRTAIL_SIZE, |
| 307 | (void *) ipath_port0_rcvhdrtail, |
| 308 | ipath_port0_rcvhdrtail_dma); |
| 309 | ipath_port0_rcvhdrtail = NULL; |
| 310 | } |
| 311 | |
| 312 | mutex_unlock(&ipath_mutex); |
| 313 | } |
| 314 | |
| 315 | /* |
| 316 | * These next two routines are placeholders in case we don't have per-arch |
| 317 | * code for controlling write combining. If explicit control of write |
| 318 | * combining is not available, performance will probably be awful. |
| 319 | */ |
| 320 | |
| 321 | int __attribute__((weak)) ipath_enable_wc(struct ipath_devdata *dd) |
| 322 | { |
| 323 | return -EOPNOTSUPP; |
| 324 | } |
| 325 | |
| 326 | void __attribute__((weak)) ipath_disable_wc(struct ipath_devdata *dd) |
| 327 | { |
| 328 | } |
| 329 | |
| 330 | static int __devinit ipath_init_one(struct pci_dev *pdev, |
| 331 | const struct pci_device_id *ent) |
| 332 | { |
| 333 | int ret, len, j; |
| 334 | struct ipath_devdata *dd; |
| 335 | unsigned long long addr; |
| 336 | u32 bar0 = 0, bar1 = 0; |
| 337 | u8 rev; |
| 338 | |
| 339 | ret = init_port0_rcvhdrtail(pdev); |
| 340 | if (ret < 0) { |
| 341 | printk(KERN_ERR IPATH_DRV_NAME |
| 342 | ": Could not allocate port0_rcvhdrtail: error %d\n", |
| 343 | -ret); |
| 344 | goto bail; |
| 345 | } |
| 346 | |
| 347 | dd = ipath_alloc_devdata(pdev); |
| 348 | if (IS_ERR(dd)) { |
| 349 | ret = PTR_ERR(dd); |
| 350 | printk(KERN_ERR IPATH_DRV_NAME |
| 351 | ": Could not allocate devdata: error %d\n", -ret); |
| 352 | goto bail_rcvhdrtail; |
| 353 | } |
| 354 | |
| 355 | ipath_cdbg(VERBOSE, "initializing unit #%u\n", dd->ipath_unit); |
| 356 | |
| 357 | read_bars(dd, pdev, &bar0, &bar1); |
| 358 | |
| 359 | ret = pci_enable_device(pdev); |
| 360 | if (ret) { |
| 361 | /* This can happen iff: |
| 362 | * |
| 363 | * We did a chip reset, and then failed to reprogram the |
| 364 | * BAR, or the chip reset due to an internal error. We then |
| 365 | * unloaded the driver and reloaded it. |
| 366 | * |
| 367 | * Both reset cases set the BAR back to initial state. For |
| 368 | * the latter case, the AER sticky error bit at offset 0x718 |
| 369 | * should be set, but the Linux kernel doesn't yet know |
| 370 | * about that, it appears. If the original BAR was retained |
| 371 | * in the kernel data structures, this may be OK. |
| 372 | */ |
| 373 | ipath_dev_err(dd, "enable unit %d failed: error %d\n", |
| 374 | dd->ipath_unit, -ret); |
| 375 | goto bail_devdata; |
| 376 | } |
| 377 | addr = pci_resource_start(pdev, 0); |
| 378 | len = pci_resource_len(pdev, 0); |
| 379 | ipath_cdbg(VERBOSE, "regbase (0) %llx len %d irq %x, vend %x/%x " |
| 380 | "driver_data %lx\n", addr, len, pdev->irq, ent->vendor, |
| 381 | ent->device, ent->driver_data); |
| 382 | |
| 383 | read_bars(dd, pdev, &bar0, &bar1); |
| 384 | |
| 385 | if (!bar1 && !(bar0 & ~0xf)) { |
| 386 | if (addr) { |
| 387 | dev_info(&pdev->dev, "BAR is 0 (probable RESET), " |
| 388 | "rewriting as %llx\n", addr); |
| 389 | ret = pci_write_config_dword( |
| 390 | pdev, PCI_BASE_ADDRESS_0, addr); |
| 391 | if (ret) { |
| 392 | ipath_dev_err(dd, "rewrite of BAR0 " |
| 393 | "failed: err %d\n", -ret); |
| 394 | goto bail_disable; |
| 395 | } |
| 396 | ret = pci_write_config_dword( |
| 397 | pdev, PCI_BASE_ADDRESS_1, addr >> 32); |
| 398 | if (ret) { |
| 399 | ipath_dev_err(dd, "rewrite of BAR1 " |
| 400 | "failed: err %d\n", -ret); |
| 401 | goto bail_disable; |
| 402 | } |
| 403 | } else { |
| 404 | ipath_dev_err(dd, "BAR is 0 (probable RESET), " |
| 405 | "not usable until reboot\n"); |
| 406 | ret = -ENODEV; |
| 407 | goto bail_disable; |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | ret = pci_request_regions(pdev, IPATH_DRV_NAME); |
| 412 | if (ret) { |
| 413 | dev_info(&pdev->dev, "pci_request_regions unit %u fails: " |
| 414 | "err %d\n", dd->ipath_unit, -ret); |
| 415 | goto bail_disable; |
| 416 | } |
| 417 | |
| 418 | ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK); |
| 419 | if (ret) { |
Bryan O'Sullivan | 68dd43a | 2006-04-24 14:22:58 -0700 | [diff] [blame] | 420 | /* |
| 421 | * if the 64 bit setup fails, try 32 bit. Some systems |
| 422 | * do not setup 64 bit maps on systems with 2GB or less |
| 423 | * memory installed. |
| 424 | */ |
| 425 | ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK); |
| 426 | if (ret) { |
| 427 | dev_info(&pdev->dev, "pci_set_dma_mask unit %u " |
| 428 | "fails: %d\n", dd->ipath_unit, ret); |
| 429 | goto bail_regions; |
| 430 | } |
| 431 | else |
| 432 | ipath_dbg("No 64bit DMA mask, used 32 bit mask\n"); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 433 | } |
| 434 | |
| 435 | pci_set_master(pdev); |
| 436 | |
| 437 | /* |
| 438 | * Save BARs to rewrite after device reset. Save all 64 bits of |
| 439 | * BAR, just in case. |
| 440 | */ |
| 441 | dd->ipath_pcibar0 = addr; |
| 442 | dd->ipath_pcibar1 = addr >> 32; |
| 443 | dd->ipath_deviceid = ent->device; /* save for later use */ |
| 444 | dd->ipath_vendorid = ent->vendor; |
| 445 | |
| 446 | /* setup the chip-specific functions, as early as possible. */ |
| 447 | switch (ent->device) { |
| 448 | case PCI_DEVICE_ID_INFINIPATH_HT: |
| 449 | ipath_init_ht400_funcs(dd); |
| 450 | break; |
| 451 | case PCI_DEVICE_ID_INFINIPATH_PE800: |
| 452 | ipath_init_pe800_funcs(dd); |
| 453 | break; |
| 454 | default: |
| 455 | ipath_dev_err(dd, "Found unknown PathScale deviceid 0x%x, " |
| 456 | "failing\n", ent->device); |
| 457 | return -ENODEV; |
| 458 | } |
| 459 | |
| 460 | for (j = 0; j < 6; j++) { |
| 461 | if (!pdev->resource[j].start) |
| 462 | continue; |
| 463 | ipath_cdbg(VERBOSE, "BAR %d start %lx, end %lx, len %lx\n", |
| 464 | j, pdev->resource[j].start, |
| 465 | pdev->resource[j].end, |
| 466 | pci_resource_len(pdev, j)); |
| 467 | } |
| 468 | |
| 469 | if (!addr) { |
| 470 | ipath_dev_err(dd, "No valid address in BAR 0!\n"); |
| 471 | ret = -ENODEV; |
| 472 | goto bail_regions; |
| 473 | } |
| 474 | |
| 475 | dd->ipath_deviceid = ent->device; /* save for later use */ |
| 476 | dd->ipath_vendorid = ent->vendor; |
| 477 | |
| 478 | ret = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev); |
| 479 | if (ret) { |
| 480 | ipath_dev_err(dd, "Failed to read PCI revision ID unit " |
| 481 | "%u: err %d\n", dd->ipath_unit, -ret); |
| 482 | goto bail_regions; /* shouldn't ever happen */ |
| 483 | } |
| 484 | dd->ipath_pcirev = rev; |
| 485 | |
| 486 | dd->ipath_kregbase = ioremap_nocache(addr, len); |
| 487 | |
| 488 | if (!dd->ipath_kregbase) { |
| 489 | ipath_dbg("Unable to map io addr %llx to kvirt, failing\n", |
| 490 | addr); |
| 491 | ret = -ENOMEM; |
| 492 | goto bail_iounmap; |
| 493 | } |
| 494 | dd->ipath_kregend = (u64 __iomem *) |
| 495 | ((void __iomem *)dd->ipath_kregbase + len); |
| 496 | dd->ipath_physaddr = addr; /* used for io_remap, etc. */ |
| 497 | /* for user mmap */ |
| 498 | dd->ipath_kregvirt = (u64 __iomem *) phys_to_virt(addr); |
| 499 | ipath_cdbg(VERBOSE, "mapped io addr %llx to kregbase %p " |
| 500 | "kregvirt %p\n", addr, dd->ipath_kregbase, |
| 501 | dd->ipath_kregvirt); |
| 502 | |
| 503 | /* |
| 504 | * clear ipath_flags here instead of in ipath_init_chip as it is set |
| 505 | * by ipath_setup_htconfig. |
| 506 | */ |
| 507 | dd->ipath_flags = 0; |
| 508 | |
| 509 | if (dd->ipath_f_bus(dd, pdev)) |
| 510 | ipath_dev_err(dd, "Failed to setup config space; " |
| 511 | "continuing anyway\n"); |
| 512 | |
| 513 | /* |
| 514 | * set up our interrupt handler; SA_SHIRQ probably not needed, |
| 515 | * since MSI interrupts shouldn't be shared but won't hurt for now. |
| 516 | * check 0 irq after we return from chip-specific bus setup, since |
| 517 | * that can affect this due to setup |
| 518 | */ |
| 519 | if (!pdev->irq) |
| 520 | ipath_dev_err(dd, "irq is 0, BIOS error? Interrupts won't " |
| 521 | "work\n"); |
| 522 | else { |
| 523 | ret = request_irq(pdev->irq, ipath_intr, SA_SHIRQ, |
| 524 | IPATH_DRV_NAME, dd); |
| 525 | if (ret) { |
| 526 | ipath_dev_err(dd, "Couldn't setup irq handler, " |
| 527 | "irq=%u: %d\n", pdev->irq, ret); |
| 528 | goto bail_iounmap; |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | ret = ipath_init_chip(dd, 0); /* do the chip-specific init */ |
| 533 | if (ret) |
| 534 | goto bail_iounmap; |
| 535 | |
| 536 | ret = ipath_enable_wc(dd); |
| 537 | |
| 538 | if (ret) { |
| 539 | ipath_dev_err(dd, "Write combining not enabled " |
| 540 | "(err %d): performance may be poor\n", |
| 541 | -ret); |
| 542 | ret = 0; |
| 543 | } |
| 544 | |
| 545 | ipath_device_create_group(&pdev->dev, dd); |
| 546 | ipathfs_add_device(dd); |
| 547 | ipath_user_add(dd); |
| 548 | ipath_layer_add(dd); |
| 549 | |
| 550 | goto bail; |
| 551 | |
| 552 | bail_iounmap: |
| 553 | iounmap((volatile void __iomem *) dd->ipath_kregbase); |
| 554 | |
| 555 | bail_regions: |
| 556 | pci_release_regions(pdev); |
| 557 | |
| 558 | bail_disable: |
| 559 | pci_disable_device(pdev); |
| 560 | |
| 561 | bail_devdata: |
| 562 | ipath_free_devdata(pdev, dd); |
| 563 | |
| 564 | bail_rcvhdrtail: |
| 565 | cleanup_port0_rcvhdrtail(pdev); |
| 566 | |
| 567 | bail: |
| 568 | return ret; |
| 569 | } |
| 570 | |
| 571 | static void __devexit ipath_remove_one(struct pci_dev *pdev) |
| 572 | { |
| 573 | struct ipath_devdata *dd; |
| 574 | |
| 575 | ipath_cdbg(VERBOSE, "removing, pdev=%p\n", pdev); |
| 576 | if (!pdev) |
| 577 | return; |
| 578 | |
| 579 | dd = pci_get_drvdata(pdev); |
| 580 | ipath_layer_del(dd); |
| 581 | ipath_user_del(dd); |
| 582 | ipathfs_remove_device(dd); |
| 583 | ipath_device_remove_group(&pdev->dev, dd); |
| 584 | ipath_cdbg(VERBOSE, "Releasing pci memory regions, dd %p, " |
| 585 | "unit %u\n", dd, (u32) dd->ipath_unit); |
| 586 | if (dd->ipath_kregbase) { |
| 587 | ipath_cdbg(VERBOSE, "Unmapping kregbase %p\n", |
| 588 | dd->ipath_kregbase); |
| 589 | iounmap((volatile void __iomem *) dd->ipath_kregbase); |
| 590 | dd->ipath_kregbase = NULL; |
| 591 | } |
| 592 | pci_release_regions(pdev); |
| 593 | ipath_cdbg(VERBOSE, "calling pci_disable_device\n"); |
| 594 | pci_disable_device(pdev); |
| 595 | |
| 596 | ipath_free_devdata(pdev, dd); |
| 597 | cleanup_port0_rcvhdrtail(pdev); |
| 598 | } |
| 599 | |
| 600 | /* general driver use */ |
| 601 | DEFINE_MUTEX(ipath_mutex); |
| 602 | |
| 603 | static DEFINE_SPINLOCK(ipath_pioavail_lock); |
| 604 | |
| 605 | /** |
| 606 | * ipath_disarm_piobufs - cancel a range of PIO buffers |
| 607 | * @dd: the infinipath device |
| 608 | * @first: the first PIO buffer to cancel |
| 609 | * @cnt: the number of PIO buffers to cancel |
| 610 | * |
| 611 | * cancel a range of PIO buffers, used when they might be armed, but |
| 612 | * not triggered. Used at init to ensure buffer state, and also user |
| 613 | * process close, in case it died while writing to a PIO buffer |
| 614 | * Also after errors. |
| 615 | */ |
| 616 | void ipath_disarm_piobufs(struct ipath_devdata *dd, unsigned first, |
| 617 | unsigned cnt) |
| 618 | { |
| 619 | unsigned i, last = first + cnt; |
| 620 | u64 sendctrl, sendorig; |
| 621 | |
| 622 | ipath_cdbg(PKT, "disarm %u PIObufs first=%u\n", cnt, first); |
| 623 | sendorig = dd->ipath_sendctrl | INFINIPATH_S_DISARM; |
| 624 | for (i = first; i < last; i++) { |
| 625 | sendctrl = sendorig | |
| 626 | (i << INFINIPATH_S_DISARMPIOBUF_SHIFT); |
| 627 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 628 | sendctrl); |
| 629 | } |
| 630 | |
| 631 | /* |
| 632 | * Write it again with current value, in case ipath_sendctrl changed |
| 633 | * while we were looping; no critical bits that would require |
| 634 | * locking. |
| 635 | * |
| 636 | * Write a 0, and then the original value, reading scratch in |
| 637 | * between. This seems to avoid a chip timing race that causes |
| 638 | * pioavail updates to memory to stop. |
| 639 | */ |
| 640 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 641 | 0); |
| 642 | sendorig = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 643 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 644 | dd->ipath_sendctrl); |
| 645 | } |
| 646 | |
| 647 | /** |
| 648 | * ipath_wait_linkstate - wait for an IB link state change to occur |
| 649 | * @dd: the infinipath device |
| 650 | * @state: the state to wait for |
| 651 | * @msecs: the number of milliseconds to wait |
| 652 | * |
| 653 | * wait up to msecs milliseconds for IB link state change to occur for |
| 654 | * now, take the easy polling route. Currently used only by |
| 655 | * ipath_layer_set_linkstate. Returns 0 if state reached, otherwise |
| 656 | * -ETIMEDOUT state can have multiple states set, for any of several |
| 657 | * transitions. |
| 658 | */ |
| 659 | int ipath_wait_linkstate(struct ipath_devdata *dd, u32 state, int msecs) |
| 660 | { |
| 661 | dd->ipath_sma_state_wanted = state; |
| 662 | wait_event_interruptible_timeout(ipath_sma_state_wait, |
| 663 | (dd->ipath_flags & state), |
| 664 | msecs_to_jiffies(msecs)); |
| 665 | dd->ipath_sma_state_wanted = 0; |
| 666 | |
| 667 | if (!(dd->ipath_flags & state)) { |
| 668 | u64 val; |
| 669 | ipath_cdbg(SMA, "Didn't reach linkstate %s within %u ms\n", |
| 670 | /* test INIT ahead of DOWN, both can be set */ |
| 671 | (state & IPATH_LINKINIT) ? "INIT" : |
| 672 | ((state & IPATH_LINKDOWN) ? "DOWN" : |
| 673 | ((state & IPATH_LINKARMED) ? "ARM" : "ACTIVE")), |
| 674 | msecs); |
| 675 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); |
| 676 | ipath_cdbg(VERBOSE, "ibcc=%llx ibcstatus=%llx (%s)\n", |
| 677 | (unsigned long long) ipath_read_kreg64( |
| 678 | dd, dd->ipath_kregs->kr_ibcctrl), |
| 679 | (unsigned long long) val, |
| 680 | ipath_ibcstatus_str[val & 0xf]); |
| 681 | } |
| 682 | return (dd->ipath_flags & state) ? 0 : -ETIMEDOUT; |
| 683 | } |
| 684 | |
| 685 | void ipath_decode_err(char *buf, size_t blen, ipath_err_t err) |
| 686 | { |
| 687 | *buf = '\0'; |
| 688 | if (err & INFINIPATH_E_RHDRLEN) |
| 689 | strlcat(buf, "rhdrlen ", blen); |
| 690 | if (err & INFINIPATH_E_RBADTID) |
| 691 | strlcat(buf, "rbadtid ", blen); |
| 692 | if (err & INFINIPATH_E_RBADVERSION) |
| 693 | strlcat(buf, "rbadversion ", blen); |
| 694 | if (err & INFINIPATH_E_RHDR) |
| 695 | strlcat(buf, "rhdr ", blen); |
| 696 | if (err & INFINIPATH_E_RLONGPKTLEN) |
| 697 | strlcat(buf, "rlongpktlen ", blen); |
| 698 | if (err & INFINIPATH_E_RSHORTPKTLEN) |
| 699 | strlcat(buf, "rshortpktlen ", blen); |
| 700 | if (err & INFINIPATH_E_RMAXPKTLEN) |
| 701 | strlcat(buf, "rmaxpktlen ", blen); |
| 702 | if (err & INFINIPATH_E_RMINPKTLEN) |
| 703 | strlcat(buf, "rminpktlen ", blen); |
| 704 | if (err & INFINIPATH_E_RFORMATERR) |
| 705 | strlcat(buf, "rformaterr ", blen); |
| 706 | if (err & INFINIPATH_E_RUNSUPVL) |
| 707 | strlcat(buf, "runsupvl ", blen); |
| 708 | if (err & INFINIPATH_E_RUNEXPCHAR) |
| 709 | strlcat(buf, "runexpchar ", blen); |
| 710 | if (err & INFINIPATH_E_RIBFLOW) |
| 711 | strlcat(buf, "ribflow ", blen); |
| 712 | if (err & INFINIPATH_E_REBP) |
| 713 | strlcat(buf, "EBP ", blen); |
| 714 | if (err & INFINIPATH_E_SUNDERRUN) |
| 715 | strlcat(buf, "sunderrun ", blen); |
| 716 | if (err & INFINIPATH_E_SPIOARMLAUNCH) |
| 717 | strlcat(buf, "spioarmlaunch ", blen); |
| 718 | if (err & INFINIPATH_E_SUNEXPERRPKTNUM) |
| 719 | strlcat(buf, "sunexperrpktnum ", blen); |
| 720 | if (err & INFINIPATH_E_SDROPPEDDATAPKT) |
| 721 | strlcat(buf, "sdroppeddatapkt ", blen); |
| 722 | if (err & INFINIPATH_E_SDROPPEDSMPPKT) |
| 723 | strlcat(buf, "sdroppedsmppkt ", blen); |
| 724 | if (err & INFINIPATH_E_SMAXPKTLEN) |
| 725 | strlcat(buf, "smaxpktlen ", blen); |
| 726 | if (err & INFINIPATH_E_SMINPKTLEN) |
| 727 | strlcat(buf, "sminpktlen ", blen); |
| 728 | if (err & INFINIPATH_E_SUNSUPVL) |
| 729 | strlcat(buf, "sunsupVL ", blen); |
| 730 | if (err & INFINIPATH_E_SPKTLEN) |
| 731 | strlcat(buf, "spktlen ", blen); |
| 732 | if (err & INFINIPATH_E_INVALIDADDR) |
| 733 | strlcat(buf, "invalidaddr ", blen); |
| 734 | if (err & INFINIPATH_E_RICRC) |
| 735 | strlcat(buf, "CRC ", blen); |
| 736 | if (err & INFINIPATH_E_RVCRC) |
| 737 | strlcat(buf, "VCRC ", blen); |
| 738 | if (err & INFINIPATH_E_RRCVEGRFULL) |
| 739 | strlcat(buf, "rcvegrfull ", blen); |
| 740 | if (err & INFINIPATH_E_RRCVHDRFULL) |
| 741 | strlcat(buf, "rcvhdrfull ", blen); |
| 742 | if (err & INFINIPATH_E_IBSTATUSCHANGED) |
| 743 | strlcat(buf, "ibcstatuschg ", blen); |
| 744 | if (err & INFINIPATH_E_RIBLOSTLINK) |
| 745 | strlcat(buf, "riblostlink ", blen); |
| 746 | if (err & INFINIPATH_E_HARDWARE) |
| 747 | strlcat(buf, "hardware ", blen); |
| 748 | if (err & INFINIPATH_E_RESET) |
| 749 | strlcat(buf, "reset ", blen); |
| 750 | } |
| 751 | |
| 752 | /** |
| 753 | * get_rhf_errstring - decode RHF errors |
| 754 | * @err: the err number |
| 755 | * @msg: the output buffer |
| 756 | * @len: the length of the output buffer |
| 757 | * |
| 758 | * only used one place now, may want more later |
| 759 | */ |
| 760 | static void get_rhf_errstring(u32 err, char *msg, size_t len) |
| 761 | { |
| 762 | /* if no errors, and so don't need to check what's first */ |
| 763 | *msg = '\0'; |
| 764 | |
| 765 | if (err & INFINIPATH_RHF_H_ICRCERR) |
| 766 | strlcat(msg, "icrcerr ", len); |
| 767 | if (err & INFINIPATH_RHF_H_VCRCERR) |
| 768 | strlcat(msg, "vcrcerr ", len); |
| 769 | if (err & INFINIPATH_RHF_H_PARITYERR) |
| 770 | strlcat(msg, "parityerr ", len); |
| 771 | if (err & INFINIPATH_RHF_H_LENERR) |
| 772 | strlcat(msg, "lenerr ", len); |
| 773 | if (err & INFINIPATH_RHF_H_MTUERR) |
| 774 | strlcat(msg, "mtuerr ", len); |
| 775 | if (err & INFINIPATH_RHF_H_IHDRERR) |
| 776 | /* infinipath hdr checksum error */ |
| 777 | strlcat(msg, "ipathhdrerr ", len); |
| 778 | if (err & INFINIPATH_RHF_H_TIDERR) |
| 779 | strlcat(msg, "tiderr ", len); |
| 780 | if (err & INFINIPATH_RHF_H_MKERR) |
| 781 | /* bad port, offset, etc. */ |
| 782 | strlcat(msg, "invalid ipathhdr ", len); |
| 783 | if (err & INFINIPATH_RHF_H_IBERR) |
| 784 | strlcat(msg, "iberr ", len); |
| 785 | if (err & INFINIPATH_RHF_L_SWA) |
| 786 | strlcat(msg, "swA ", len); |
| 787 | if (err & INFINIPATH_RHF_L_SWB) |
| 788 | strlcat(msg, "swB ", len); |
| 789 | } |
| 790 | |
| 791 | /** |
| 792 | * ipath_get_egrbuf - get an eager buffer |
| 793 | * @dd: the infinipath device |
| 794 | * @bufnum: the eager buffer to get |
| 795 | * @err: unused |
| 796 | * |
| 797 | * must only be called if ipath_pd[port] is known to be allocated |
| 798 | */ |
| 799 | static inline void *ipath_get_egrbuf(struct ipath_devdata *dd, u32 bufnum, |
| 800 | int err) |
| 801 | { |
| 802 | return dd->ipath_port0_skbs ? |
| 803 | (void *)dd->ipath_port0_skbs[bufnum]->data : NULL; |
| 804 | } |
| 805 | |
| 806 | /** |
| 807 | * ipath_alloc_skb - allocate an skb and buffer with possible constraints |
| 808 | * @dd: the infinipath device |
| 809 | * @gfp_mask: the sk_buff SFP mask |
| 810 | */ |
| 811 | struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, |
| 812 | gfp_t gfp_mask) |
| 813 | { |
| 814 | struct sk_buff *skb; |
| 815 | u32 len; |
| 816 | |
| 817 | /* |
| 818 | * Only fully supported way to handle this is to allocate lots |
| 819 | * extra, align as needed, and then do skb_reserve(). That wastes |
| 820 | * a lot of memory... I'll have to hack this into infinipath_copy |
| 821 | * also. |
| 822 | */ |
| 823 | |
| 824 | /* |
| 825 | * We need 4 extra bytes for unaligned transfer copying |
| 826 | */ |
| 827 | if (dd->ipath_flags & IPATH_4BYTE_TID) { |
| 828 | /* we need a 4KB multiple alignment, and there is no way |
| 829 | * to do it except to allocate extra and then skb_reserve |
| 830 | * enough to bring it up to the right alignment. |
| 831 | */ |
| 832 | len = dd->ipath_ibmaxlen + 4 + (1 << 11) - 1; |
| 833 | } |
| 834 | else |
| 835 | len = dd->ipath_ibmaxlen + 4; |
| 836 | skb = __dev_alloc_skb(len, gfp_mask); |
| 837 | if (!skb) { |
| 838 | ipath_dev_err(dd, "Failed to allocate skbuff, length %u\n", |
| 839 | len); |
| 840 | goto bail; |
| 841 | } |
| 842 | if (dd->ipath_flags & IPATH_4BYTE_TID) { |
| 843 | u32 una = ((1 << 11) - 1) & (unsigned long)(skb->data + 4); |
| 844 | if (una) |
| 845 | skb_reserve(skb, 4 + (1 << 11) - una); |
| 846 | else |
| 847 | skb_reserve(skb, 4); |
| 848 | } else |
| 849 | skb_reserve(skb, 4); |
| 850 | |
| 851 | bail: |
| 852 | return skb; |
| 853 | } |
| 854 | |
| 855 | /** |
| 856 | * ipath_rcv_layer - receive a packet for the layered (ethernet) driver |
| 857 | * @dd: the infinipath device |
| 858 | * @etail: the sk_buff number |
| 859 | * @tlen: the total packet length |
| 860 | * @hdr: the ethernet header |
| 861 | * |
| 862 | * Separate routine for better overall optimization |
| 863 | */ |
| 864 | static void ipath_rcv_layer(struct ipath_devdata *dd, u32 etail, |
| 865 | u32 tlen, struct ether_header *hdr) |
| 866 | { |
| 867 | u32 elen; |
| 868 | u8 pad, *bthbytes; |
| 869 | struct sk_buff *skb, *nskb; |
| 870 | |
| 871 | if (dd->ipath_port0_skbs && hdr->sub_opcode == OPCODE_ENCAP) { |
| 872 | /* |
| 873 | * Allocate a new sk_buff to replace the one we give |
| 874 | * to the network stack. |
| 875 | */ |
| 876 | nskb = ipath_alloc_skb(dd, GFP_ATOMIC); |
| 877 | if (!nskb) { |
| 878 | /* count OK packets that we drop */ |
| 879 | ipath_stats.sps_krdrops++; |
| 880 | return; |
| 881 | } |
| 882 | |
| 883 | bthbytes = (u8 *) hdr->bth; |
| 884 | pad = (bthbytes[1] >> 4) & 3; |
| 885 | /* +CRC32 */ |
| 886 | elen = tlen - (sizeof(*hdr) + pad + sizeof(u32)); |
| 887 | |
| 888 | skb = dd->ipath_port0_skbs[etail]; |
| 889 | dd->ipath_port0_skbs[etail] = nskb; |
| 890 | skb_put(skb, elen); |
| 891 | |
| 892 | dd->ipath_f_put_tid(dd, etail + (u64 __iomem *) |
| 893 | ((char __iomem *) dd->ipath_kregbase |
| 894 | + dd->ipath_rcvegrbase), 0, |
| 895 | virt_to_phys(nskb->data)); |
| 896 | |
| 897 | __ipath_layer_rcv(dd, hdr, skb); |
| 898 | |
| 899 | /* another ether packet received */ |
| 900 | ipath_stats.sps_ether_rpkts++; |
| 901 | } |
| 902 | else if (hdr->sub_opcode == OPCODE_LID_ARP) |
| 903 | __ipath_layer_rcv_lid(dd, hdr); |
| 904 | } |
| 905 | |
| 906 | /* |
| 907 | * ipath_kreceive - receive a packet |
| 908 | * @dd: the infinipath device |
| 909 | * |
| 910 | * called from interrupt handler for errors or receive interrupt |
| 911 | */ |
| 912 | void ipath_kreceive(struct ipath_devdata *dd) |
| 913 | { |
| 914 | u64 *rc; |
| 915 | void *ebuf; |
| 916 | const u32 rsize = dd->ipath_rcvhdrentsize; /* words */ |
| 917 | const u32 maxcnt = dd->ipath_rcvhdrcnt * rsize; /* words */ |
| 918 | u32 etail = -1, l, hdrqtail; |
| 919 | struct ips_message_header *hdr; |
| 920 | u32 eflags, i, etype, tlen, pkttot = 0; |
| 921 | static u64 totcalls; /* stats, may eventually remove */ |
| 922 | char emsg[128]; |
| 923 | |
| 924 | if (!dd->ipath_hdrqtailptr) { |
| 925 | ipath_dev_err(dd, |
| 926 | "hdrqtailptr not set, can't do receives\n"); |
| 927 | goto bail; |
| 928 | } |
| 929 | |
| 930 | /* There is already a thread processing this queue. */ |
| 931 | if (test_and_set_bit(0, &dd->ipath_rcv_pending)) |
| 932 | goto bail; |
| 933 | |
| 934 | if (dd->ipath_port0head == |
| 935 | (u32)le64_to_cpu(*dd->ipath_hdrqtailptr)) |
| 936 | goto done; |
| 937 | |
| 938 | gotmore: |
| 939 | /* |
| 940 | * read only once at start. If in flood situation, this helps |
| 941 | * performance slightly. If more arrive while we are processing, |
| 942 | * we'll come back here and do them |
| 943 | */ |
| 944 | hdrqtail = (u32)le64_to_cpu(*dd->ipath_hdrqtailptr); |
| 945 | |
| 946 | for (i = 0, l = dd->ipath_port0head; l != hdrqtail; i++) { |
| 947 | u32 qp; |
| 948 | u8 *bthbytes; |
| 949 | |
| 950 | rc = (u64 *) (dd->ipath_pd[0]->port_rcvhdrq + (l << 2)); |
| 951 | hdr = (struct ips_message_header *)&rc[1]; |
| 952 | /* |
| 953 | * could make a network order version of IPATH_KD_QP, and |
| 954 | * do the obvious shift before masking to speed this up. |
| 955 | */ |
| 956 | qp = ntohl(hdr->bth[1]) & 0xffffff; |
| 957 | bthbytes = (u8 *) hdr->bth; |
| 958 | |
| 959 | eflags = ips_get_hdr_err_flags((__le32 *) rc); |
| 960 | etype = ips_get_rcv_type((__le32 *) rc); |
| 961 | /* total length */ |
| 962 | tlen = ips_get_length_in_bytes((__le32 *) rc); |
| 963 | ebuf = NULL; |
| 964 | if (etype != RCVHQ_RCV_TYPE_EXPECTED) { |
| 965 | /* |
| 966 | * it turns out that the chips uses an eager buffer |
| 967 | * for all non-expected packets, whether it "needs" |
| 968 | * one or not. So always get the index, but don't |
| 969 | * set ebuf (so we try to copy data) unless the |
| 970 | * length requires it. |
| 971 | */ |
| 972 | etail = ips_get_index((__le32 *) rc); |
| 973 | if (tlen > sizeof(*hdr) || |
| 974 | etype == RCVHQ_RCV_TYPE_NON_KD) |
| 975 | ebuf = ipath_get_egrbuf(dd, etail, 0); |
| 976 | } |
| 977 | |
| 978 | /* |
| 979 | * both tiderr and ipathhdrerr are set for all plain IB |
| 980 | * packets; only ipathhdrerr should be set. |
| 981 | */ |
| 982 | |
| 983 | if (etype != RCVHQ_RCV_TYPE_NON_KD && etype != |
| 984 | RCVHQ_RCV_TYPE_ERROR && ips_get_ipath_ver( |
| 985 | hdr->iph.ver_port_tid_offset) != |
| 986 | IPS_PROTO_VERSION) { |
| 987 | ipath_cdbg(PKT, "Bad InfiniPath protocol version " |
| 988 | "%x\n", etype); |
| 989 | } |
| 990 | |
| 991 | if (eflags & ~(INFINIPATH_RHF_H_TIDERR | |
| 992 | INFINIPATH_RHF_H_IHDRERR)) { |
| 993 | get_rhf_errstring(eflags, emsg, sizeof emsg); |
| 994 | ipath_cdbg(PKT, "RHFerrs %x hdrqtail=%x typ=%u " |
| 995 | "tlen=%x opcode=%x egridx=%x: %s\n", |
| 996 | eflags, l, etype, tlen, bthbytes[0], |
| 997 | ips_get_index((__le32 *) rc), emsg); |
| 998 | } else if (etype == RCVHQ_RCV_TYPE_NON_KD) { |
| 999 | int ret = __ipath_verbs_rcv(dd, rc + 1, |
| 1000 | ebuf, tlen); |
| 1001 | if (ret == -ENODEV) |
| 1002 | ipath_cdbg(VERBOSE, |
| 1003 | "received IB packet, " |
| 1004 | "not SMA (QP=%x)\n", qp); |
| 1005 | } else if (etype == RCVHQ_RCV_TYPE_EAGER) { |
| 1006 | if (qp == IPATH_KD_QP && |
| 1007 | bthbytes[0] == ipath_layer_rcv_opcode && |
| 1008 | ebuf) |
| 1009 | ipath_rcv_layer(dd, etail, tlen, |
| 1010 | (struct ether_header *)hdr); |
| 1011 | else |
| 1012 | ipath_cdbg(PKT, "typ %x, opcode %x (eager, " |
| 1013 | "qp=%x), len %x; ignored\n", |
| 1014 | etype, bthbytes[0], qp, tlen); |
| 1015 | } |
| 1016 | else if (etype == RCVHQ_RCV_TYPE_EXPECTED) |
| 1017 | ipath_dbg("Bug: Expected TID, opcode %x; ignored\n", |
| 1018 | be32_to_cpu(hdr->bth[0]) & 0xff); |
| 1019 | else if (eflags & (INFINIPATH_RHF_H_TIDERR | |
| 1020 | INFINIPATH_RHF_H_IHDRERR)) { |
| 1021 | /* |
| 1022 | * This is a type 3 packet, only the LRH is in the |
| 1023 | * rcvhdrq, the rest of the header is in the eager |
| 1024 | * buffer. |
| 1025 | */ |
| 1026 | u8 opcode; |
| 1027 | if (ebuf) { |
| 1028 | bthbytes = (u8 *) ebuf; |
| 1029 | opcode = *bthbytes; |
| 1030 | } |
| 1031 | else |
| 1032 | opcode = 0; |
| 1033 | get_rhf_errstring(eflags, emsg, sizeof emsg); |
| 1034 | ipath_dbg("Err %x (%s), opcode %x, egrbuf %x, " |
| 1035 | "len %x\n", eflags, emsg, opcode, etail, |
| 1036 | tlen); |
| 1037 | } else { |
| 1038 | /* |
| 1039 | * error packet, type of error unknown. |
| 1040 | * Probably type 3, but we don't know, so don't |
| 1041 | * even try to print the opcode, etc. |
| 1042 | */ |
| 1043 | ipath_dbg("Error Pkt, but no eflags! egrbuf %x, " |
| 1044 | "len %x\nhdrq@%lx;hdrq+%x rhf: %llx; " |
| 1045 | "hdr %llx %llx %llx %llx %llx\n", |
| 1046 | etail, tlen, (unsigned long) rc, l, |
| 1047 | (unsigned long long) rc[0], |
| 1048 | (unsigned long long) rc[1], |
| 1049 | (unsigned long long) rc[2], |
| 1050 | (unsigned long long) rc[3], |
| 1051 | (unsigned long long) rc[4], |
| 1052 | (unsigned long long) rc[5]); |
| 1053 | } |
| 1054 | l += rsize; |
| 1055 | if (l >= maxcnt) |
| 1056 | l = 0; |
| 1057 | /* |
| 1058 | * update for each packet, to help prevent overflows if we |
| 1059 | * have lots of packets. |
| 1060 | */ |
| 1061 | (void)ipath_write_ureg(dd, ur_rcvhdrhead, |
| 1062 | dd->ipath_rhdrhead_intr_off | l, 0); |
| 1063 | if (etype != RCVHQ_RCV_TYPE_EXPECTED) |
| 1064 | (void)ipath_write_ureg(dd, ur_rcvegrindexhead, |
| 1065 | etail, 0); |
| 1066 | } |
| 1067 | |
| 1068 | pkttot += i; |
| 1069 | |
| 1070 | dd->ipath_port0head = l; |
| 1071 | |
| 1072 | if (hdrqtail != (u32)le64_to_cpu(*dd->ipath_hdrqtailptr)) |
| 1073 | /* more arrived while we handled first batch */ |
| 1074 | goto gotmore; |
| 1075 | |
| 1076 | if (pkttot > ipath_stats.sps_maxpkts_call) |
| 1077 | ipath_stats.sps_maxpkts_call = pkttot; |
| 1078 | ipath_stats.sps_port0pkts += pkttot; |
| 1079 | ipath_stats.sps_avgpkts_call = |
| 1080 | ipath_stats.sps_port0pkts / ++totcalls; |
| 1081 | |
| 1082 | done: |
| 1083 | clear_bit(0, &dd->ipath_rcv_pending); |
| 1084 | smp_mb__after_clear_bit(); |
| 1085 | |
| 1086 | bail:; |
| 1087 | } |
| 1088 | |
| 1089 | /** |
| 1090 | * ipath_update_pio_bufs - update shadow copy of the PIO availability map |
| 1091 | * @dd: the infinipath device |
| 1092 | * |
| 1093 | * called whenever our local copy indicates we have run out of send buffers |
| 1094 | * NOTE: This can be called from interrupt context by some code |
| 1095 | * and from non-interrupt context by ipath_getpiobuf(). |
| 1096 | */ |
| 1097 | |
| 1098 | static void ipath_update_pio_bufs(struct ipath_devdata *dd) |
| 1099 | { |
| 1100 | unsigned long flags; |
| 1101 | int i; |
| 1102 | const unsigned piobregs = (unsigned)dd->ipath_pioavregs; |
| 1103 | |
| 1104 | /* If the generation (check) bits have changed, then we update the |
| 1105 | * busy bit for the corresponding PIO buffer. This algorithm will |
| 1106 | * modify positions to the value they already have in some cases |
| 1107 | * (i.e., no change), but it's faster than changing only the bits |
| 1108 | * that have changed. |
| 1109 | * |
| 1110 | * We would like to do this atomicly, to avoid spinlocks in the |
| 1111 | * critical send path, but that's not really possible, given the |
| 1112 | * type of changes, and that this routine could be called on |
| 1113 | * multiple cpu's simultaneously, so we lock in this routine only, |
| 1114 | * to avoid conflicting updates; all we change is the shadow, and |
| 1115 | * it's a single 64 bit memory location, so by definition the update |
| 1116 | * is atomic in terms of what other cpu's can see in testing the |
| 1117 | * bits. The spin_lock overhead isn't too bad, since it only |
| 1118 | * happens when all buffers are in use, so only cpu overhead, not |
| 1119 | * latency or bandwidth is affected. |
| 1120 | */ |
| 1121 | #define _IPATH_ALL_CHECKBITS 0x5555555555555555ULL |
| 1122 | if (!dd->ipath_pioavailregs_dma) { |
| 1123 | ipath_dbg("Update shadow pioavail, but regs_dma NULL!\n"); |
| 1124 | return; |
| 1125 | } |
| 1126 | if (ipath_debug & __IPATH_VERBDBG) { |
| 1127 | /* only if packet debug and verbose */ |
| 1128 | volatile __le64 *dma = dd->ipath_pioavailregs_dma; |
| 1129 | unsigned long *shadow = dd->ipath_pioavailshadow; |
| 1130 | |
| 1131 | ipath_cdbg(PKT, "Refill avail, dma0=%llx shad0=%lx, " |
| 1132 | "d1=%llx s1=%lx, d2=%llx s2=%lx, d3=%llx " |
| 1133 | "s3=%lx\n", |
| 1134 | (unsigned long long) le64_to_cpu(dma[0]), |
| 1135 | shadow[0], |
| 1136 | (unsigned long long) le64_to_cpu(dma[1]), |
| 1137 | shadow[1], |
| 1138 | (unsigned long long) le64_to_cpu(dma[2]), |
| 1139 | shadow[2], |
| 1140 | (unsigned long long) le64_to_cpu(dma[3]), |
| 1141 | shadow[3]); |
| 1142 | if (piobregs > 4) |
| 1143 | ipath_cdbg( |
| 1144 | PKT, "2nd group, dma4=%llx shad4=%lx, " |
| 1145 | "d5=%llx s5=%lx, d6=%llx s6=%lx, " |
| 1146 | "d7=%llx s7=%lx\n", |
| 1147 | (unsigned long long) le64_to_cpu(dma[4]), |
| 1148 | shadow[4], |
| 1149 | (unsigned long long) le64_to_cpu(dma[5]), |
| 1150 | shadow[5], |
| 1151 | (unsigned long long) le64_to_cpu(dma[6]), |
| 1152 | shadow[6], |
| 1153 | (unsigned long long) le64_to_cpu(dma[7]), |
| 1154 | shadow[7]); |
| 1155 | } |
| 1156 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
| 1157 | for (i = 0; i < piobregs; i++) { |
| 1158 | u64 pchbusy, pchg, piov, pnew; |
| 1159 | /* |
| 1160 | * Chip Errata: bug 6641; even and odd qwords>3 are swapped |
| 1161 | */ |
| 1162 | if (i > 3) { |
| 1163 | if (i & 1) |
| 1164 | piov = le64_to_cpu( |
| 1165 | dd->ipath_pioavailregs_dma[i - 1]); |
| 1166 | else |
| 1167 | piov = le64_to_cpu( |
| 1168 | dd->ipath_pioavailregs_dma[i + 1]); |
| 1169 | } else |
| 1170 | piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i]); |
| 1171 | pchg = _IPATH_ALL_CHECKBITS & |
| 1172 | ~(dd->ipath_pioavailshadow[i] ^ piov); |
| 1173 | pchbusy = pchg << INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT; |
| 1174 | if (pchg && (pchbusy & dd->ipath_pioavailshadow[i])) { |
| 1175 | pnew = dd->ipath_pioavailshadow[i] & ~pchbusy; |
| 1176 | pnew |= piov & pchbusy; |
| 1177 | dd->ipath_pioavailshadow[i] = pnew; |
| 1178 | } |
| 1179 | } |
| 1180 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
| 1181 | } |
| 1182 | |
| 1183 | /** |
| 1184 | * ipath_setrcvhdrsize - set the receive header size |
| 1185 | * @dd: the infinipath device |
| 1186 | * @rhdrsize: the receive header size |
| 1187 | * |
| 1188 | * called from user init code, and also layered driver init |
| 1189 | */ |
| 1190 | int ipath_setrcvhdrsize(struct ipath_devdata *dd, unsigned rhdrsize) |
| 1191 | { |
| 1192 | int ret = 0; |
| 1193 | |
| 1194 | if (dd->ipath_flags & IPATH_RCVHDRSZ_SET) { |
| 1195 | if (dd->ipath_rcvhdrsize != rhdrsize) { |
| 1196 | dev_info(&dd->pcidev->dev, |
| 1197 | "Error: can't set protocol header " |
| 1198 | "size %u, already %u\n", |
| 1199 | rhdrsize, dd->ipath_rcvhdrsize); |
| 1200 | ret = -EAGAIN; |
| 1201 | } else |
| 1202 | ipath_cdbg(VERBOSE, "Reuse same protocol header " |
| 1203 | "size %u\n", dd->ipath_rcvhdrsize); |
| 1204 | } else if (rhdrsize > (dd->ipath_rcvhdrentsize - |
| 1205 | (sizeof(u64) / sizeof(u32)))) { |
| 1206 | ipath_dbg("Error: can't set protocol header size %u " |
| 1207 | "(> max %u)\n", rhdrsize, |
| 1208 | dd->ipath_rcvhdrentsize - |
| 1209 | (u32) (sizeof(u64) / sizeof(u32))); |
| 1210 | ret = -EOVERFLOW; |
| 1211 | } else { |
| 1212 | dd->ipath_flags |= IPATH_RCVHDRSZ_SET; |
| 1213 | dd->ipath_rcvhdrsize = rhdrsize; |
| 1214 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize, |
| 1215 | dd->ipath_rcvhdrsize); |
| 1216 | ipath_cdbg(VERBOSE, "Set protocol header size to %u\n", |
| 1217 | dd->ipath_rcvhdrsize); |
| 1218 | } |
| 1219 | return ret; |
| 1220 | } |
| 1221 | |
| 1222 | /** |
| 1223 | * ipath_getpiobuf - find an available pio buffer |
| 1224 | * @dd: the infinipath device |
| 1225 | * @pbufnum: the buffer number is placed here |
| 1226 | * |
| 1227 | * do appropriate marking as busy, etc. |
| 1228 | * returns buffer number if one found (>=0), negative number is error. |
| 1229 | * Used by ipath_sma_send_pkt and ipath_layer_send |
| 1230 | */ |
| 1231 | u32 __iomem *ipath_getpiobuf(struct ipath_devdata *dd, u32 * pbufnum) |
| 1232 | { |
| 1233 | int i, j, starti, updated = 0; |
| 1234 | unsigned piobcnt, iter; |
| 1235 | unsigned long flags; |
| 1236 | unsigned long *shadow = dd->ipath_pioavailshadow; |
| 1237 | u32 __iomem *buf; |
| 1238 | |
| 1239 | piobcnt = (unsigned)(dd->ipath_piobcnt2k |
| 1240 | + dd->ipath_piobcnt4k); |
| 1241 | starti = dd->ipath_lastport_piobuf; |
| 1242 | iter = piobcnt - starti; |
| 1243 | if (dd->ipath_upd_pio_shadow) { |
| 1244 | /* |
| 1245 | * Minor optimization. If we had no buffers on last call, |
| 1246 | * start out by doing the update; continue and do scan even |
| 1247 | * if no buffers were updated, to be paranoid |
| 1248 | */ |
| 1249 | ipath_update_pio_bufs(dd); |
| 1250 | /* we scanned here, don't do it at end of scan */ |
| 1251 | updated = 1; |
| 1252 | i = starti; |
| 1253 | } else |
| 1254 | i = dd->ipath_lastpioindex; |
| 1255 | |
| 1256 | rescan: |
| 1257 | /* |
| 1258 | * while test_and_set_bit() is atomic, we do that and then the |
| 1259 | * change_bit(), and the pair is not. See if this is the cause |
| 1260 | * of the remaining armlaunch errors. |
| 1261 | */ |
| 1262 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
| 1263 | for (j = 0; j < iter; j++, i++) { |
| 1264 | if (i >= piobcnt) |
| 1265 | i = starti; |
| 1266 | /* |
| 1267 | * To avoid bus lock overhead, we first find a candidate |
| 1268 | * buffer, then do the test and set, and continue if that |
| 1269 | * fails. |
| 1270 | */ |
| 1271 | if (test_bit((2 * i) + 1, shadow) || |
| 1272 | test_and_set_bit((2 * i) + 1, shadow)) |
| 1273 | continue; |
| 1274 | /* flip generation bit */ |
| 1275 | change_bit(2 * i, shadow); |
| 1276 | break; |
| 1277 | } |
| 1278 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
| 1279 | |
| 1280 | if (j == iter) { |
| 1281 | volatile __le64 *dma = dd->ipath_pioavailregs_dma; |
| 1282 | |
| 1283 | /* |
| 1284 | * first time through; shadow exhausted, but may be real |
| 1285 | * buffers available, so go see; if any updated, rescan |
| 1286 | * (once) |
| 1287 | */ |
| 1288 | if (!updated) { |
| 1289 | ipath_update_pio_bufs(dd); |
| 1290 | updated = 1; |
| 1291 | i = starti; |
| 1292 | goto rescan; |
| 1293 | } |
| 1294 | dd->ipath_upd_pio_shadow = 1; |
| 1295 | /* |
| 1296 | * not atomic, but if we lose one once in a while, that's OK |
| 1297 | */ |
| 1298 | ipath_stats.sps_nopiobufs++; |
| 1299 | if (!(++dd->ipath_consec_nopiobuf % 100000)) { |
| 1300 | ipath_dbg( |
| 1301 | "%u pio sends with no bufavail; dmacopy: " |
| 1302 | "%llx %llx %llx %llx; shadow: " |
| 1303 | "%lx %lx %lx %lx\n", |
| 1304 | dd->ipath_consec_nopiobuf, |
| 1305 | (unsigned long long) le64_to_cpu(dma[0]), |
| 1306 | (unsigned long long) le64_to_cpu(dma[1]), |
| 1307 | (unsigned long long) le64_to_cpu(dma[2]), |
| 1308 | (unsigned long long) le64_to_cpu(dma[3]), |
| 1309 | shadow[0], shadow[1], shadow[2], |
| 1310 | shadow[3]); |
| 1311 | /* |
| 1312 | * 4 buffers per byte, 4 registers above, cover rest |
| 1313 | * below |
| 1314 | */ |
| 1315 | if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) > |
| 1316 | (sizeof(shadow[0]) * 4 * 4)) |
| 1317 | ipath_dbg("2nd group: dmacopy: %llx %llx " |
| 1318 | "%llx %llx; shadow: %lx %lx " |
| 1319 | "%lx %lx\n", |
| 1320 | (unsigned long long) |
| 1321 | le64_to_cpu(dma[4]), |
| 1322 | (unsigned long long) |
| 1323 | le64_to_cpu(dma[5]), |
| 1324 | (unsigned long long) |
| 1325 | le64_to_cpu(dma[6]), |
| 1326 | (unsigned long long) |
| 1327 | le64_to_cpu(dma[7]), |
| 1328 | shadow[4], shadow[5], |
| 1329 | shadow[6], shadow[7]); |
| 1330 | } |
| 1331 | buf = NULL; |
| 1332 | goto bail; |
| 1333 | } |
| 1334 | |
| 1335 | if (updated) |
| 1336 | /* |
| 1337 | * ran out of bufs, now some (at least this one we just |
| 1338 | * got) are now available, so tell the layered driver. |
| 1339 | */ |
| 1340 | __ipath_layer_intr(dd, IPATH_LAYER_INT_SEND_CONTINUE); |
| 1341 | |
| 1342 | /* |
| 1343 | * set next starting place. Since it's just an optimization, |
| 1344 | * it doesn't matter who wins on this, so no locking |
| 1345 | */ |
| 1346 | dd->ipath_lastpioindex = i + 1; |
| 1347 | if (dd->ipath_upd_pio_shadow) |
| 1348 | dd->ipath_upd_pio_shadow = 0; |
| 1349 | if (dd->ipath_consec_nopiobuf) |
| 1350 | dd->ipath_consec_nopiobuf = 0; |
| 1351 | if (i < dd->ipath_piobcnt2k) |
| 1352 | buf = (u32 __iomem *) (dd->ipath_pio2kbase + |
| 1353 | i * dd->ipath_palign); |
| 1354 | else |
| 1355 | buf = (u32 __iomem *) |
| 1356 | (dd->ipath_pio4kbase + |
| 1357 | (i - dd->ipath_piobcnt2k) * dd->ipath_4kalign); |
| 1358 | ipath_cdbg(VERBOSE, "Return piobuf%u %uk @ %p\n", |
| 1359 | i, (i < dd->ipath_piobcnt2k) ? 2 : 4, buf); |
| 1360 | if (pbufnum) |
| 1361 | *pbufnum = i; |
| 1362 | |
| 1363 | bail: |
| 1364 | return buf; |
| 1365 | } |
| 1366 | |
| 1367 | /** |
| 1368 | * ipath_create_rcvhdrq - create a receive header queue |
| 1369 | * @dd: the infinipath device |
| 1370 | * @pd: the port data |
| 1371 | * |
| 1372 | * this *must* be physically contiguous memory, and for now, |
| 1373 | * that limits it to what kmalloc can do. |
| 1374 | */ |
| 1375 | int ipath_create_rcvhdrq(struct ipath_devdata *dd, |
| 1376 | struct ipath_portdata *pd) |
| 1377 | { |
| 1378 | int ret = 0, amt; |
| 1379 | |
| 1380 | amt = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * |
| 1381 | sizeof(u32), PAGE_SIZE); |
| 1382 | if (!pd->port_rcvhdrq) { |
| 1383 | /* |
| 1384 | * not using REPEAT isn't viable; at 128KB, we can easily |
| 1385 | * fail this. The problem with REPEAT is we can block here |
| 1386 | * "forever". There isn't an inbetween, unfortunately. We |
| 1387 | * could reduce the risk by never freeing the rcvhdrq except |
| 1388 | * at unload, but even then, the first time a port is used, |
| 1389 | * we could delay for some time... |
| 1390 | */ |
| 1391 | gfp_t gfp_flags = GFP_USER | __GFP_COMP; |
| 1392 | |
| 1393 | pd->port_rcvhdrq = dma_alloc_coherent( |
| 1394 | &dd->pcidev->dev, amt, &pd->port_rcvhdrq_phys, |
| 1395 | gfp_flags); |
| 1396 | |
| 1397 | if (!pd->port_rcvhdrq) { |
| 1398 | ipath_dev_err(dd, "attempt to allocate %d bytes " |
| 1399 | "for port %u rcvhdrq failed\n", |
| 1400 | amt, pd->port_port); |
| 1401 | ret = -ENOMEM; |
| 1402 | goto bail; |
| 1403 | } |
| 1404 | |
| 1405 | pd->port_rcvhdrq_size = amt; |
| 1406 | |
| 1407 | ipath_cdbg(VERBOSE, "%d pages at %p (phys %lx) size=%lu " |
| 1408 | "for port %u rcvhdr Q\n", |
| 1409 | amt >> PAGE_SHIFT, pd->port_rcvhdrq, |
| 1410 | (unsigned long) pd->port_rcvhdrq_phys, |
| 1411 | (unsigned long) pd->port_rcvhdrq_size, |
| 1412 | pd->port_port); |
| 1413 | } else { |
| 1414 | /* |
| 1415 | * clear for security, sanity, and/or debugging, each |
| 1416 | * time we reuse |
| 1417 | */ |
| 1418 | memset(pd->port_rcvhdrq, 0, amt); |
| 1419 | } |
| 1420 | |
| 1421 | /* |
| 1422 | * tell chip each time we init it, even if we are re-using previous |
| 1423 | * memory (we zero it at process close) |
| 1424 | */ |
| 1425 | ipath_cdbg(VERBOSE, "writing port %d rcvhdraddr as %lx\n", |
| 1426 | pd->port_port, (unsigned long) pd->port_rcvhdrq_phys); |
| 1427 | ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, |
| 1428 | pd->port_port, pd->port_rcvhdrq_phys); |
| 1429 | |
| 1430 | ret = 0; |
| 1431 | bail: |
| 1432 | return ret; |
| 1433 | } |
| 1434 | |
| 1435 | int ipath_waitfor_complete(struct ipath_devdata *dd, ipath_kreg reg_id, |
| 1436 | u64 bits_to_wait_for, u64 * valp) |
| 1437 | { |
| 1438 | unsigned long timeout; |
| 1439 | u64 lastval, val; |
| 1440 | int ret; |
| 1441 | |
| 1442 | lastval = ipath_read_kreg64(dd, reg_id); |
| 1443 | /* wait a ridiculously long time */ |
| 1444 | timeout = jiffies + msecs_to_jiffies(5); |
| 1445 | do { |
| 1446 | val = ipath_read_kreg64(dd, reg_id); |
| 1447 | /* set so they have something, even on failures. */ |
| 1448 | *valp = val; |
| 1449 | if ((val & bits_to_wait_for) == bits_to_wait_for) { |
| 1450 | ret = 0; |
| 1451 | break; |
| 1452 | } |
| 1453 | if (val != lastval) |
| 1454 | ipath_cdbg(VERBOSE, "Changed from %llx to %llx, " |
| 1455 | "waiting for %llx bits\n", |
| 1456 | (unsigned long long) lastval, |
| 1457 | (unsigned long long) val, |
| 1458 | (unsigned long long) bits_to_wait_for); |
| 1459 | cond_resched(); |
| 1460 | if (time_after(jiffies, timeout)) { |
| 1461 | ipath_dbg("Didn't get bits %llx in register 0x%x, " |
| 1462 | "got %llx\n", |
| 1463 | (unsigned long long) bits_to_wait_for, |
| 1464 | reg_id, (unsigned long long) *valp); |
| 1465 | ret = -ENODEV; |
| 1466 | break; |
| 1467 | } |
| 1468 | } while (1); |
| 1469 | |
| 1470 | return ret; |
| 1471 | } |
| 1472 | |
| 1473 | /** |
| 1474 | * ipath_waitfor_mdio_cmdready - wait for last command to complete |
| 1475 | * @dd: the infinipath device |
| 1476 | * |
| 1477 | * Like ipath_waitfor_complete(), but we wait for the CMDVALID bit to go |
| 1478 | * away indicating the last command has completed. It doesn't return data |
| 1479 | */ |
| 1480 | int ipath_waitfor_mdio_cmdready(struct ipath_devdata *dd) |
| 1481 | { |
| 1482 | unsigned long timeout; |
| 1483 | u64 val; |
| 1484 | int ret; |
| 1485 | |
| 1486 | /* wait a ridiculously long time */ |
| 1487 | timeout = jiffies + msecs_to_jiffies(5); |
| 1488 | do { |
| 1489 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_mdio); |
| 1490 | if (!(val & IPATH_MDIO_CMDVALID)) { |
| 1491 | ret = 0; |
| 1492 | break; |
| 1493 | } |
| 1494 | cond_resched(); |
| 1495 | if (time_after(jiffies, timeout)) { |
| 1496 | ipath_dbg("CMDVALID stuck in mdio reg? (%llx)\n", |
| 1497 | (unsigned long long) val); |
| 1498 | ret = -ENODEV; |
| 1499 | break; |
| 1500 | } |
| 1501 | } while (1); |
| 1502 | |
| 1503 | return ret; |
| 1504 | } |
| 1505 | |
| 1506 | void ipath_set_ib_lstate(struct ipath_devdata *dd, int which) |
| 1507 | { |
| 1508 | static const char *what[4] = { |
| 1509 | [0] = "DOWN", |
| 1510 | [INFINIPATH_IBCC_LINKCMD_INIT] = "INIT", |
| 1511 | [INFINIPATH_IBCC_LINKCMD_ARMED] = "ARMED", |
| 1512 | [INFINIPATH_IBCC_LINKCMD_ACTIVE] = "ACTIVE" |
| 1513 | }; |
| 1514 | ipath_cdbg(SMA, "Trying to move unit %u to %s, current ltstate " |
| 1515 | "is %s\n", dd->ipath_unit, |
| 1516 | what[(which >> INFINIPATH_IBCC_LINKCMD_SHIFT) & |
| 1517 | INFINIPATH_IBCC_LINKCMD_MASK], |
| 1518 | ipath_ibcstatus_str[ |
| 1519 | (ipath_read_kreg64 |
| 1520 | (dd, dd->ipath_kregs->kr_ibcstatus) >> |
| 1521 | INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) & |
| 1522 | INFINIPATH_IBCS_LINKTRAININGSTATE_MASK]); |
| 1523 | |
| 1524 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, |
| 1525 | dd->ipath_ibcctrl | which); |
| 1526 | } |
| 1527 | |
| 1528 | /** |
| 1529 | * ipath_read_kreg64_port - read a device's per-port 64-bit kernel register |
| 1530 | * @dd: the infinipath device |
| 1531 | * @regno: the register number to read |
| 1532 | * @port: the port containing the register |
| 1533 | * |
| 1534 | * Registers that vary with the chip implementation constants (port) |
| 1535 | * use this routine. |
| 1536 | */ |
| 1537 | u64 ipath_read_kreg64_port(const struct ipath_devdata *dd, ipath_kreg regno, |
| 1538 | unsigned port) |
| 1539 | { |
| 1540 | u16 where; |
| 1541 | |
| 1542 | if (port < dd->ipath_portcnt && |
| 1543 | (regno == dd->ipath_kregs->kr_rcvhdraddr || |
| 1544 | regno == dd->ipath_kregs->kr_rcvhdrtailaddr)) |
| 1545 | where = regno + port; |
| 1546 | else |
| 1547 | where = -1; |
| 1548 | |
| 1549 | return ipath_read_kreg64(dd, where); |
| 1550 | } |
| 1551 | |
| 1552 | /** |
| 1553 | * ipath_write_kreg_port - write a device's per-port 64-bit kernel register |
| 1554 | * @dd: the infinipath device |
| 1555 | * @regno: the register number to write |
| 1556 | * @port: the port containing the register |
| 1557 | * @value: the value to write |
| 1558 | * |
| 1559 | * Registers that vary with the chip implementation constants (port) |
| 1560 | * use this routine. |
| 1561 | */ |
| 1562 | void ipath_write_kreg_port(const struct ipath_devdata *dd, ipath_kreg regno, |
| 1563 | unsigned port, u64 value) |
| 1564 | { |
| 1565 | u16 where; |
| 1566 | |
| 1567 | if (port < dd->ipath_portcnt && |
| 1568 | (regno == dd->ipath_kregs->kr_rcvhdraddr || |
| 1569 | regno == dd->ipath_kregs->kr_rcvhdrtailaddr)) |
| 1570 | where = regno + port; |
| 1571 | else |
| 1572 | where = -1; |
| 1573 | |
| 1574 | ipath_write_kreg(dd, where, value); |
| 1575 | } |
| 1576 | |
| 1577 | /** |
| 1578 | * ipath_shutdown_device - shut down a device |
| 1579 | * @dd: the infinipath device |
| 1580 | * |
| 1581 | * This is called to make the device quiet when we are about to |
| 1582 | * unload the driver, and also when the device is administratively |
| 1583 | * disabled. It does not free any data structures. |
| 1584 | * Everything it does has to be setup again by ipath_init_chip(dd,1) |
| 1585 | */ |
| 1586 | void ipath_shutdown_device(struct ipath_devdata *dd) |
| 1587 | { |
| 1588 | u64 val; |
| 1589 | |
| 1590 | ipath_dbg("Shutting down the device\n"); |
| 1591 | |
| 1592 | dd->ipath_flags |= IPATH_LINKUNK; |
| 1593 | dd->ipath_flags &= ~(IPATH_INITTED | IPATH_LINKDOWN | |
| 1594 | IPATH_LINKINIT | IPATH_LINKARMED | |
| 1595 | IPATH_LINKACTIVE); |
| 1596 | *dd->ipath_statusp &= ~(IPATH_STATUS_IB_CONF | |
| 1597 | IPATH_STATUS_IB_READY); |
| 1598 | |
| 1599 | /* mask interrupts, but not errors */ |
| 1600 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); |
| 1601 | |
| 1602 | dd->ipath_rcvctrl = 0; |
| 1603 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, |
| 1604 | dd->ipath_rcvctrl); |
| 1605 | |
| 1606 | /* |
| 1607 | * gracefully stop all sends allowing any in progress to trickle out |
| 1608 | * first. |
| 1609 | */ |
| 1610 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 0ULL); |
| 1611 | /* flush it */ |
| 1612 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 1613 | /* |
| 1614 | * enough for anything that's going to trickle out to have actually |
| 1615 | * done so. |
| 1616 | */ |
| 1617 | udelay(5); |
| 1618 | |
| 1619 | /* |
| 1620 | * abort any armed or launched PIO buffers that didn't go. (self |
| 1621 | * clearing). Will cause any packet currently being transmitted to |
| 1622 | * go out with an EBP, and may also cause a short packet error on |
| 1623 | * the receiver. |
| 1624 | */ |
| 1625 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 1626 | INFINIPATH_S_ABORT); |
| 1627 | |
| 1628 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKINITCMD_DISABLE << |
| 1629 | INFINIPATH_IBCC_LINKINITCMD_SHIFT); |
| 1630 | |
| 1631 | /* |
| 1632 | * we are shutting down, so tell the layered driver. We don't do |
| 1633 | * this on just a link state change, much like ethernet, a cable |
| 1634 | * unplug, etc. doesn't change driver state |
| 1635 | */ |
| 1636 | ipath_layer_intr(dd, IPATH_LAYER_INT_IF_DOWN); |
| 1637 | |
| 1638 | /* disable IBC */ |
| 1639 | dd->ipath_control &= ~INFINIPATH_C_LINKENABLE; |
| 1640 | ipath_write_kreg(dd, dd->ipath_kregs->kr_control, |
| 1641 | dd->ipath_control); |
| 1642 | |
| 1643 | /* |
| 1644 | * clear SerdesEnable and turn the leds off; do this here because |
| 1645 | * we are unloading, so don't count on interrupts to move along |
| 1646 | * Turn the LEDs off explictly for the same reason. |
| 1647 | */ |
| 1648 | dd->ipath_f_quiet_serdes(dd); |
| 1649 | dd->ipath_f_setextled(dd, 0, 0); |
| 1650 | |
| 1651 | if (dd->ipath_stats_timer_active) { |
| 1652 | del_timer_sync(&dd->ipath_stats_timer); |
| 1653 | dd->ipath_stats_timer_active = 0; |
| 1654 | } |
| 1655 | |
| 1656 | /* |
| 1657 | * clear all interrupts and errors, so that the next time the driver |
| 1658 | * is loaded or device is enabled, we know that whatever is set |
| 1659 | * happened while we were unloaded |
| 1660 | */ |
| 1661 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, |
| 1662 | ~0ULL & ~INFINIPATH_HWE_MEMBISTFAILED); |
| 1663 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL); |
| 1664 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL); |
| 1665 | } |
| 1666 | |
| 1667 | /** |
| 1668 | * ipath_free_pddata - free a port's allocated data |
| 1669 | * @dd: the infinipath device |
| 1670 | * @port: the port |
| 1671 | * @freehdrq: free the port data structure if true |
| 1672 | * |
| 1673 | * when closing, free up any allocated data for a port, if the |
| 1674 | * reference count goes to zero |
| 1675 | * Note: this also optionally frees the portdata itself! |
| 1676 | * Any changes here have to be matched up with the reinit case |
| 1677 | * of ipath_init_chip(), which calls this routine on reinit after reset. |
| 1678 | */ |
| 1679 | void ipath_free_pddata(struct ipath_devdata *dd, u32 port, int freehdrq) |
| 1680 | { |
| 1681 | struct ipath_portdata *pd = dd->ipath_pd[port]; |
| 1682 | |
| 1683 | if (!pd) |
| 1684 | return; |
| 1685 | if (freehdrq) |
| 1686 | /* |
| 1687 | * only clear and free portdata if we are going to also |
| 1688 | * release the hdrq, otherwise we leak the hdrq on each |
| 1689 | * open/close cycle |
| 1690 | */ |
| 1691 | dd->ipath_pd[port] = NULL; |
| 1692 | if (freehdrq && pd->port_rcvhdrq) { |
| 1693 | ipath_cdbg(VERBOSE, "free closed port %d rcvhdrq @ %p " |
| 1694 | "(size=%lu)\n", pd->port_port, pd->port_rcvhdrq, |
| 1695 | (unsigned long) pd->port_rcvhdrq_size); |
| 1696 | dma_free_coherent(&dd->pcidev->dev, pd->port_rcvhdrq_size, |
| 1697 | pd->port_rcvhdrq, pd->port_rcvhdrq_phys); |
| 1698 | pd->port_rcvhdrq = NULL; |
| 1699 | } |
| 1700 | if (port && pd->port_rcvegrbuf) { |
| 1701 | /* always free this */ |
| 1702 | if (pd->port_rcvegrbuf) { |
| 1703 | unsigned e; |
| 1704 | |
| 1705 | for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { |
| 1706 | void *base = pd->port_rcvegrbuf[e]; |
| 1707 | size_t size = pd->port_rcvegrbuf_size; |
| 1708 | |
| 1709 | ipath_cdbg(VERBOSE, "egrbuf free(%p, %lu), " |
| 1710 | "chunk %u/%u\n", base, |
| 1711 | (unsigned long) size, |
| 1712 | e, pd->port_rcvegrbuf_chunks); |
| 1713 | dma_free_coherent( |
| 1714 | &dd->pcidev->dev, size, base, |
| 1715 | pd->port_rcvegrbuf_phys[e]); |
| 1716 | } |
| 1717 | vfree(pd->port_rcvegrbuf); |
| 1718 | pd->port_rcvegrbuf = NULL; |
| 1719 | vfree(pd->port_rcvegrbuf_phys); |
| 1720 | pd->port_rcvegrbuf_phys = NULL; |
| 1721 | } |
| 1722 | pd->port_rcvegrbuf_chunks = 0; |
| 1723 | } else if (port == 0 && dd->ipath_port0_skbs) { |
| 1724 | unsigned e; |
| 1725 | struct sk_buff **skbs = dd->ipath_port0_skbs; |
| 1726 | |
| 1727 | dd->ipath_port0_skbs = NULL; |
| 1728 | ipath_cdbg(VERBOSE, "free closed port %d ipath_port0_skbs " |
| 1729 | "@ %p\n", pd->port_port, skbs); |
| 1730 | for (e = 0; e < dd->ipath_rcvegrcnt; e++) |
| 1731 | if (skbs[e]) |
| 1732 | dev_kfree_skb(skbs[e]); |
| 1733 | vfree(skbs); |
| 1734 | } |
| 1735 | if (freehdrq) { |
| 1736 | kfree(pd->port_tid_pg_list); |
| 1737 | kfree(pd); |
| 1738 | } |
| 1739 | } |
| 1740 | |
Roland Dreier | ac2ae4c | 2006-04-19 11:40:12 -0700 | [diff] [blame] | 1741 | static int __init infinipath_init(void) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1742 | { |
| 1743 | int ret; |
| 1744 | |
| 1745 | ipath_dbg(KERN_INFO DRIVER_LOAD_MSG "%s", ipath_core_version); |
| 1746 | |
| 1747 | /* |
| 1748 | * These must be called before the driver is registered with |
| 1749 | * the PCI subsystem. |
| 1750 | */ |
| 1751 | idr_init(&unit_table); |
| 1752 | if (!idr_pre_get(&unit_table, GFP_KERNEL)) { |
| 1753 | ret = -ENOMEM; |
| 1754 | goto bail; |
| 1755 | } |
| 1756 | |
| 1757 | ret = pci_register_driver(&ipath_driver); |
| 1758 | if (ret < 0) { |
| 1759 | printk(KERN_ERR IPATH_DRV_NAME |
| 1760 | ": Unable to register driver: error %d\n", -ret); |
| 1761 | goto bail_unit; |
| 1762 | } |
| 1763 | |
| 1764 | ret = ipath_driver_create_group(&ipath_driver.driver); |
| 1765 | if (ret < 0) { |
| 1766 | printk(KERN_ERR IPATH_DRV_NAME ": Unable to create driver " |
| 1767 | "sysfs entries: error %d\n", -ret); |
| 1768 | goto bail_pci; |
| 1769 | } |
| 1770 | |
| 1771 | ret = ipath_init_ipathfs(); |
| 1772 | if (ret < 0) { |
| 1773 | printk(KERN_ERR IPATH_DRV_NAME ": Unable to create " |
| 1774 | "ipathfs: error %d\n", -ret); |
| 1775 | goto bail_group; |
| 1776 | } |
| 1777 | |
| 1778 | goto bail; |
| 1779 | |
| 1780 | bail_group: |
| 1781 | ipath_driver_remove_group(&ipath_driver.driver); |
| 1782 | |
| 1783 | bail_pci: |
| 1784 | pci_unregister_driver(&ipath_driver); |
| 1785 | |
| 1786 | bail_unit: |
| 1787 | idr_destroy(&unit_table); |
| 1788 | |
| 1789 | bail: |
| 1790 | return ret; |
| 1791 | } |
| 1792 | |
| 1793 | static void cleanup_device(struct ipath_devdata *dd) |
| 1794 | { |
| 1795 | int port; |
| 1796 | |
| 1797 | ipath_shutdown_device(dd); |
| 1798 | |
| 1799 | if (*dd->ipath_statusp & IPATH_STATUS_CHIP_PRESENT) { |
| 1800 | /* can't do anything more with chip; needs re-init */ |
| 1801 | *dd->ipath_statusp &= ~IPATH_STATUS_CHIP_PRESENT; |
| 1802 | if (dd->ipath_kregbase) { |
| 1803 | /* |
| 1804 | * if we haven't already cleaned up before these are |
| 1805 | * to ensure any register reads/writes "fail" until |
| 1806 | * re-init |
| 1807 | */ |
| 1808 | dd->ipath_kregbase = NULL; |
| 1809 | dd->ipath_kregvirt = NULL; |
| 1810 | dd->ipath_uregbase = 0; |
| 1811 | dd->ipath_sregbase = 0; |
| 1812 | dd->ipath_cregbase = 0; |
| 1813 | dd->ipath_kregsize = 0; |
| 1814 | } |
| 1815 | ipath_disable_wc(dd); |
| 1816 | } |
| 1817 | |
| 1818 | if (dd->ipath_pioavailregs_dma) { |
| 1819 | dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE, |
| 1820 | (void *) dd->ipath_pioavailregs_dma, |
| 1821 | dd->ipath_pioavailregs_phys); |
| 1822 | dd->ipath_pioavailregs_dma = NULL; |
| 1823 | } |
| 1824 | |
| 1825 | if (dd->ipath_pageshadow) { |
| 1826 | struct page **tmpp = dd->ipath_pageshadow; |
| 1827 | int i, cnt = 0; |
| 1828 | |
| 1829 | ipath_cdbg(VERBOSE, "Unlocking any expTID pages still " |
| 1830 | "locked\n"); |
| 1831 | for (port = 0; port < dd->ipath_cfgports; port++) { |
| 1832 | int port_tidbase = port * dd->ipath_rcvtidcnt; |
| 1833 | int maxtid = port_tidbase + dd->ipath_rcvtidcnt; |
| 1834 | for (i = port_tidbase; i < maxtid; i++) { |
| 1835 | if (!tmpp[i]) |
| 1836 | continue; |
| 1837 | ipath_release_user_pages(&tmpp[i], 1); |
| 1838 | tmpp[i] = NULL; |
| 1839 | cnt++; |
| 1840 | } |
| 1841 | } |
| 1842 | if (cnt) { |
| 1843 | ipath_stats.sps_pageunlocks += cnt; |
| 1844 | ipath_cdbg(VERBOSE, "There were still %u expTID " |
| 1845 | "entries locked\n", cnt); |
| 1846 | } |
| 1847 | if (ipath_stats.sps_pagelocks || |
| 1848 | ipath_stats.sps_pageunlocks) |
| 1849 | ipath_cdbg(VERBOSE, "%llu pages locked, %llu " |
| 1850 | "unlocked via ipath_m{un}lock\n", |
| 1851 | (unsigned long long) |
| 1852 | ipath_stats.sps_pagelocks, |
| 1853 | (unsigned long long) |
| 1854 | ipath_stats.sps_pageunlocks); |
| 1855 | |
| 1856 | ipath_cdbg(VERBOSE, "Free shadow page tid array at %p\n", |
| 1857 | dd->ipath_pageshadow); |
| 1858 | vfree(dd->ipath_pageshadow); |
| 1859 | dd->ipath_pageshadow = NULL; |
| 1860 | } |
| 1861 | |
| 1862 | /* |
| 1863 | * free any resources still in use (usually just kernel ports) |
| 1864 | * at unload |
| 1865 | */ |
| 1866 | for (port = 0; port < dd->ipath_cfgports; port++) |
| 1867 | ipath_free_pddata(dd, port, 1); |
| 1868 | kfree(dd->ipath_pd); |
| 1869 | /* |
| 1870 | * debuggability, in case some cleanup path tries to use it |
| 1871 | * after this |
| 1872 | */ |
| 1873 | dd->ipath_pd = NULL; |
| 1874 | } |
| 1875 | |
| 1876 | static void __exit infinipath_cleanup(void) |
| 1877 | { |
| 1878 | struct ipath_devdata *dd, *tmp; |
| 1879 | unsigned long flags; |
| 1880 | |
| 1881 | ipath_exit_ipathfs(); |
| 1882 | |
| 1883 | ipath_driver_remove_group(&ipath_driver.driver); |
| 1884 | |
| 1885 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 1886 | |
| 1887 | /* |
| 1888 | * turn off rcv, send, and interrupts for all ports, all drivers |
| 1889 | * should also hard reset the chip here? |
| 1890 | * free up port 0 (kernel) rcvhdr, egr bufs, and eventually tid bufs |
| 1891 | * for all versions of the driver, if they were allocated |
| 1892 | */ |
| 1893 | list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) { |
| 1894 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 1895 | |
| 1896 | if (dd->ipath_kregbase) |
| 1897 | cleanup_device(dd); |
| 1898 | |
| 1899 | if (dd->pcidev) { |
| 1900 | if (dd->pcidev->irq) { |
| 1901 | ipath_cdbg(VERBOSE, |
| 1902 | "unit %u free_irq of irq %x\n", |
| 1903 | dd->ipath_unit, dd->pcidev->irq); |
| 1904 | free_irq(dd->pcidev->irq, dd); |
| 1905 | } else |
| 1906 | ipath_dbg("irq is 0, not doing free_irq " |
| 1907 | "for unit %u\n", dd->ipath_unit); |
Bryan O'Sullivan | b0ff7c2 | 2006-05-23 11:32:33 -0700 | [diff] [blame] | 1908 | |
| 1909 | /* |
| 1910 | * we check for NULL here, because it's outside |
| 1911 | * the kregbase check, and we need to call it |
| 1912 | * after the free_irq. Thus it's possible that |
| 1913 | * the function pointers were never initialized. |
| 1914 | */ |
| 1915 | if (dd->ipath_f_cleanup) |
| 1916 | /* clean up chip-specific stuff */ |
| 1917 | dd->ipath_f_cleanup(dd); |
| 1918 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1919 | dd->pcidev = NULL; |
| 1920 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1921 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 1922 | } |
| 1923 | |
| 1924 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 1925 | |
| 1926 | ipath_cdbg(VERBOSE, "Unregistering pci driver\n"); |
| 1927 | pci_unregister_driver(&ipath_driver); |
| 1928 | |
| 1929 | idr_destroy(&unit_table); |
| 1930 | } |
| 1931 | |
| 1932 | /** |
| 1933 | * ipath_reset_device - reset the chip if possible |
| 1934 | * @unit: the device to reset |
| 1935 | * |
| 1936 | * Whether or not reset is successful, we attempt to re-initialize the chip |
| 1937 | * (that is, much like a driver unload/reload). We clear the INITTED flag |
| 1938 | * so that the various entry points will fail until we reinitialize. For |
| 1939 | * now, we only allow this if no user ports are open that use chip resources |
| 1940 | */ |
| 1941 | int ipath_reset_device(int unit) |
| 1942 | { |
| 1943 | int ret, i; |
| 1944 | struct ipath_devdata *dd = ipath_lookup(unit); |
| 1945 | |
| 1946 | if (!dd) { |
| 1947 | ret = -ENODEV; |
| 1948 | goto bail; |
| 1949 | } |
| 1950 | |
| 1951 | dev_info(&dd->pcidev->dev, "Reset on unit %u requested\n", unit); |
| 1952 | |
| 1953 | if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) { |
| 1954 | dev_info(&dd->pcidev->dev, "Invalid unit number %u or " |
| 1955 | "not initialized or not present\n", unit); |
| 1956 | ret = -ENXIO; |
| 1957 | goto bail; |
| 1958 | } |
| 1959 | |
| 1960 | if (dd->ipath_pd) |
Bryan O'Sullivan | 23e86a4 | 2006-04-24 14:22:59 -0700 | [diff] [blame] | 1961 | for (i = 1; i < dd->ipath_cfgports; i++) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1962 | if (dd->ipath_pd[i] && dd->ipath_pd[i]->port_cnt) { |
| 1963 | ipath_dbg("unit %u port %d is in use " |
| 1964 | "(PID %u cmd %s), can't reset\n", |
| 1965 | unit, i, |
| 1966 | dd->ipath_pd[i]->port_pid, |
| 1967 | dd->ipath_pd[i]->port_comm); |
| 1968 | ret = -EBUSY; |
| 1969 | goto bail; |
| 1970 | } |
| 1971 | } |
| 1972 | |
| 1973 | dd->ipath_flags &= ~IPATH_INITTED; |
| 1974 | ret = dd->ipath_f_reset(dd); |
| 1975 | if (ret != 1) |
| 1976 | ipath_dbg("reset was not successful\n"); |
| 1977 | ipath_dbg("Trying to reinitialize unit %u after reset attempt\n", |
| 1978 | unit); |
| 1979 | ret = ipath_init_chip(dd, 1); |
| 1980 | if (ret) |
| 1981 | ipath_dev_err(dd, "Reinitialize unit %u after " |
| 1982 | "reset failed with %d\n", unit, ret); |
| 1983 | else |
| 1984 | dev_info(&dd->pcidev->dev, "Reinitialized unit %u after " |
| 1985 | "resetting\n", unit); |
| 1986 | |
| 1987 | bail: |
| 1988 | return ret; |
| 1989 | } |
| 1990 | |
| 1991 | module_init(infinipath_init); |
| 1992 | module_exit(infinipath_cleanup); |