Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1 | /* |
Ralph Campbell | e7eacd3 | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2 | * Copyright (c) 2006, 2007, 2008 QLogic Corporation. 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 | |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame^] | 34 | #include <linux/sched.h> |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 35 | #include <linux/spinlock.h> |
| 36 | #include <linux/idr.h> |
| 37 | #include <linux/pci.h> |
Dave Olson | 9bec399 | 2007-06-01 13:01:47 -0700 | [diff] [blame] | 38 | #include <linux/io.h> |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 39 | #include <linux/delay.h> |
| 40 | #include <linux/netdevice.h> |
| 41 | #include <linux/vmalloc.h> |
| 42 | |
| 43 | #include "ipath_kernel.h" |
Bryan O'Sullivan | b1c1b6a | 2006-08-25 11:24:31 -0700 | [diff] [blame] | 44 | #include "ipath_verbs.h" |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 45 | |
| 46 | static void ipath_update_pio_bufs(struct ipath_devdata *); |
| 47 | |
| 48 | const char *ipath_get_unit_name(int unit) |
| 49 | { |
| 50 | static char iname[16]; |
| 51 | snprintf(iname, sizeof iname, "infinipath%u", unit); |
| 52 | return iname; |
| 53 | } |
| 54 | |
Bryan O'Sullivan | 759d576 | 2006-07-01 04:35:49 -0700 | [diff] [blame] | 55 | #define DRIVER_LOAD_MSG "QLogic " IPATH_DRV_NAME " loaded: " |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 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 | */ |
Bryan O'Sullivan | b55f4f0 | 2006-08-25 11:24:33 -0700 | [diff] [blame] | 62 | const char ib_ipath_version[] = IPATH_IDSTR "\n"; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 63 | |
| 64 | static struct idr unit_table; |
| 65 | DEFINE_SPINLOCK(ipath_devs_lock); |
| 66 | LIST_HEAD(ipath_dev_list); |
| 67 | |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 68 | wait_queue_head_t ipath_state_wait; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 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 | |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 76 | unsigned ipath_mtu4096 = 1; /* max 4KB IB mtu by default, if supported */ |
| 77 | module_param_named(mtu4096, ipath_mtu4096, uint, S_IRUGO); |
| 78 | MODULE_PARM_DESC(mtu4096, "enable MTU of 4096 bytes, if supported"); |
| 79 | |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 80 | static unsigned ipath_hol_timeout_ms = 13000; |
| 81 | module_param_named(hol_timeout_ms, ipath_hol_timeout_ms, uint, S_IRUGO); |
| 82 | MODULE_PARM_DESC(hol_timeout_ms, |
| 83 | "duration of user app suspension after link failure"); |
| 84 | |
Dave Olson | 72708a0 | 2008-04-16 21:09:25 -0700 | [diff] [blame] | 85 | unsigned ipath_linkrecovery = 1; |
| 86 | module_param_named(linkrecovery, ipath_linkrecovery, uint, S_IWUSR | S_IRUGO); |
| 87 | MODULE_PARM_DESC(linkrecovery, "enable workaround for link recovery issue"); |
| 88 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 89 | MODULE_LICENSE("GPL"); |
Ralph Campbell | 928e3e4 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 90 | MODULE_AUTHOR("QLogic <support@qlogic.com>"); |
Bryan O'Sullivan | 759d576 | 2006-07-01 04:35:49 -0700 | [diff] [blame] | 91 | MODULE_DESCRIPTION("QLogic InfiniPath driver"); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 92 | |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 93 | /* |
| 94 | * Table to translate the LINKTRAININGSTATE portion of |
| 95 | * IBCStatus to a human-readable form. |
| 96 | */ |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 97 | const char *ipath_ibcstatus_str[] = { |
| 98 | "Disabled", |
| 99 | "LinkUp", |
| 100 | "PollActive", |
| 101 | "PollQuiet", |
| 102 | "SleepDelay", |
| 103 | "SleepQuiet", |
| 104 | "LState6", /* unused */ |
| 105 | "LState7", /* unused */ |
| 106 | "CfgDebounce", |
| 107 | "CfgRcvfCfg", |
| 108 | "CfgWaitRmt", |
| 109 | "CfgIdle", |
| 110 | "RecovRetrain", |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 111 | "CfgTxRevLane", /* unused before IBA7220 */ |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 112 | "RecovWaitRmt", |
| 113 | "RecovIdle", |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 114 | /* below were added for IBA7220 */ |
| 115 | "CfgEnhanced", |
| 116 | "CfgTest", |
| 117 | "CfgWaitRmtTest", |
| 118 | "CfgWaitCfgEnhanced", |
| 119 | "SendTS_T", |
| 120 | "SendTstIdles", |
| 121 | "RcvTS_T", |
| 122 | "SendTst_TS1s", |
| 123 | "LTState18", "LTState19", "LTState1A", "LTState1B", |
| 124 | "LTState1C", "LTState1D", "LTState1E", "LTState1F" |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 125 | }; |
| 126 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 127 | static void __devexit ipath_remove_one(struct pci_dev *); |
| 128 | static int __devinit ipath_init_one(struct pci_dev *, |
| 129 | const struct pci_device_id *); |
| 130 | |
| 131 | /* Only needed for registration, nothing else needs this info */ |
| 132 | #define PCI_VENDOR_ID_PATHSCALE 0x1fc1 |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 133 | #define PCI_VENDOR_ID_QLOGIC 0x1077 |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 134 | #define PCI_DEVICE_ID_INFINIPATH_HT 0xd |
| 135 | #define PCI_DEVICE_ID_INFINIPATH_PE800 0x10 |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 136 | #define PCI_DEVICE_ID_INFINIPATH_7220 0x7220 |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 137 | |
Arthur Jones | 3588423 | 2007-07-06 12:48:53 -0700 | [diff] [blame] | 138 | /* Number of seconds before our card status check... */ |
| 139 | #define STATUS_TIMEOUT 60 |
| 140 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 141 | static const struct pci_device_id ipath_pci_tbl[] = { |
Roland Dreier | 6f4bb3d | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 142 | { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_HT) }, |
| 143 | { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_INFINIPATH_PE800) }, |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 144 | { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_INFINIPATH_7220) }, |
Roland Dreier | 6f4bb3d | 2006-05-12 14:57:52 -0700 | [diff] [blame] | 145 | { 0, } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 146 | }; |
| 147 | |
| 148 | MODULE_DEVICE_TABLE(pci, ipath_pci_tbl); |
| 149 | |
| 150 | static struct pci_driver ipath_driver = { |
| 151 | .name = IPATH_DRV_NAME, |
| 152 | .probe = ipath_init_one, |
| 153 | .remove = __devexit_p(ipath_remove_one), |
| 154 | .id_table = ipath_pci_tbl, |
Greg Kroah-Hartman | 23b9c1a | 2007-12-04 22:53:16 -0800 | [diff] [blame] | 155 | .driver = { |
| 156 | .groups = ipath_driver_attr_groups, |
| 157 | }, |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 158 | }; |
| 159 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 160 | static inline void read_bars(struct ipath_devdata *dd, struct pci_dev *dev, |
| 161 | u32 *bar0, u32 *bar1) |
| 162 | { |
| 163 | int ret; |
| 164 | |
| 165 | ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, bar0); |
| 166 | if (ret) |
| 167 | ipath_dev_err(dd, "failed to read bar0 before enable: " |
| 168 | "error %d\n", -ret); |
| 169 | |
| 170 | ret = pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, bar1); |
| 171 | if (ret) |
| 172 | ipath_dev_err(dd, "failed to read bar1 before enable: " |
| 173 | "error %d\n", -ret); |
| 174 | |
| 175 | ipath_dbg("Read bar0 %x bar1 %x\n", *bar0, *bar1); |
| 176 | } |
| 177 | |
| 178 | static void ipath_free_devdata(struct pci_dev *pdev, |
| 179 | struct ipath_devdata *dd) |
| 180 | { |
| 181 | unsigned long flags; |
| 182 | |
| 183 | pci_set_drvdata(pdev, NULL); |
| 184 | |
| 185 | if (dd->ipath_unit != -1) { |
| 186 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 187 | idr_remove(&unit_table, dd->ipath_unit); |
| 188 | list_del(&dd->ipath_list); |
| 189 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 190 | } |
Bryan O'Sullivan | 06993ca | 2006-07-01 04:36:02 -0700 | [diff] [blame] | 191 | vfree(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | static struct ipath_devdata *ipath_alloc_devdata(struct pci_dev *pdev) |
| 195 | { |
| 196 | unsigned long flags; |
| 197 | struct ipath_devdata *dd; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 198 | int ret; |
| 199 | |
| 200 | if (!idr_pre_get(&unit_table, GFP_KERNEL)) { |
| 201 | dd = ERR_PTR(-ENOMEM); |
| 202 | goto bail; |
| 203 | } |
| 204 | |
Bryan O'Sullivan | 06993ca | 2006-07-01 04:36:02 -0700 | [diff] [blame] | 205 | dd = vmalloc(sizeof(*dd)); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 206 | if (!dd) { |
| 207 | dd = ERR_PTR(-ENOMEM); |
| 208 | goto bail; |
| 209 | } |
Bryan O'Sullivan | 06993ca | 2006-07-01 04:36:02 -0700 | [diff] [blame] | 210 | memset(dd, 0, sizeof(*dd)); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 211 | dd->ipath_unit = -1; |
| 212 | |
| 213 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 214 | |
| 215 | ret = idr_get_new(&unit_table, dd, &dd->ipath_unit); |
| 216 | if (ret < 0) { |
| 217 | printk(KERN_ERR IPATH_DRV_NAME |
| 218 | ": Could not allocate unit ID: error %d\n", -ret); |
| 219 | ipath_free_devdata(pdev, dd); |
| 220 | dd = ERR_PTR(ret); |
| 221 | goto bail_unlock; |
| 222 | } |
| 223 | |
| 224 | dd->pcidev = pdev; |
| 225 | pci_set_drvdata(pdev, dd); |
| 226 | |
| 227 | list_add(&dd->ipath_list, &ipath_dev_list); |
| 228 | |
| 229 | bail_unlock: |
| 230 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 231 | |
| 232 | bail: |
| 233 | return dd; |
| 234 | } |
| 235 | |
| 236 | static inline struct ipath_devdata *__ipath_lookup(int unit) |
| 237 | { |
| 238 | return idr_find(&unit_table, unit); |
| 239 | } |
| 240 | |
| 241 | struct ipath_devdata *ipath_lookup(int unit) |
| 242 | { |
| 243 | struct ipath_devdata *dd; |
| 244 | unsigned long flags; |
| 245 | |
| 246 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 247 | dd = __ipath_lookup(unit); |
| 248 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 249 | |
| 250 | return dd; |
| 251 | } |
| 252 | |
Arthur Jones | 6ef6aee | 2008-04-16 21:01:06 -0700 | [diff] [blame] | 253 | int ipath_count_units(int *npresentp, int *nupp, int *maxportsp) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 254 | { |
| 255 | int nunits, npresent, nup; |
| 256 | struct ipath_devdata *dd; |
| 257 | unsigned long flags; |
Arthur Jones | 6ef6aee | 2008-04-16 21:01:06 -0700 | [diff] [blame] | 258 | int maxports; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 259 | |
| 260 | nunits = npresent = nup = maxports = 0; |
| 261 | |
| 262 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 263 | |
| 264 | list_for_each_entry(dd, &ipath_dev_list, ipath_list) { |
| 265 | nunits++; |
| 266 | if ((dd->ipath_flags & IPATH_PRESENT) && dd->ipath_kregbase) |
| 267 | npresent++; |
| 268 | if (dd->ipath_lid && |
| 269 | !(dd->ipath_flags & (IPATH_DISABLED | IPATH_LINKDOWN |
| 270 | | IPATH_LINKUNK))) |
| 271 | nup++; |
| 272 | if (dd->ipath_cfgports > maxports) |
| 273 | maxports = dd->ipath_cfgports; |
| 274 | } |
| 275 | |
| 276 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 277 | |
| 278 | if (npresentp) |
| 279 | *npresentp = npresent; |
| 280 | if (nupp) |
| 281 | *nupp = nup; |
| 282 | if (maxportsp) |
| 283 | *maxportsp = maxports; |
| 284 | |
| 285 | return nunits; |
| 286 | } |
| 287 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 288 | /* |
| 289 | * These next two routines are placeholders in case we don't have per-arch |
| 290 | * code for controlling write combining. If explicit control of write |
| 291 | * combining is not available, performance will probably be awful. |
| 292 | */ |
| 293 | |
| 294 | int __attribute__((weak)) ipath_enable_wc(struct ipath_devdata *dd) |
| 295 | { |
| 296 | return -EOPNOTSUPP; |
| 297 | } |
| 298 | |
| 299 | void __attribute__((weak)) ipath_disable_wc(struct ipath_devdata *dd) |
| 300 | { |
| 301 | } |
| 302 | |
Dave Olson | 9bec399 | 2007-06-01 13:01:47 -0700 | [diff] [blame] | 303 | /* |
| 304 | * Perform a PIO buffer bandwidth write test, to verify proper system |
| 305 | * configuration. Even when all the setup calls work, occasionally |
| 306 | * BIOS or other issues can prevent write combining from working, or |
| 307 | * can cause other bandwidth problems to the chip. |
| 308 | * |
| 309 | * This test simply writes the same buffer over and over again, and |
| 310 | * measures close to the peak bandwidth to the chip (not testing |
| 311 | * data bandwidth to the wire). On chips that use an address-based |
| 312 | * trigger to send packets to the wire, this is easy. On chips that |
| 313 | * use a count to trigger, we want to make sure that the packet doesn't |
| 314 | * go out on the wire, or trigger flow control checks. |
| 315 | */ |
| 316 | static void ipath_verify_pioperf(struct ipath_devdata *dd) |
| 317 | { |
| 318 | u32 pbnum, cnt, lcnt; |
| 319 | u32 __iomem *piobuf; |
| 320 | u32 *addr; |
| 321 | u64 msecs, emsecs; |
| 322 | |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 323 | piobuf = ipath_getpiobuf(dd, 0, &pbnum); |
Dave Olson | 9bec399 | 2007-06-01 13:01:47 -0700 | [diff] [blame] | 324 | if (!piobuf) { |
| 325 | dev_info(&dd->pcidev->dev, |
| 326 | "No PIObufs for checking perf, skipping\n"); |
| 327 | return; |
| 328 | } |
| 329 | |
| 330 | /* |
| 331 | * Enough to give us a reasonable test, less than piobuf size, and |
| 332 | * likely multiple of store buffer length. |
| 333 | */ |
| 334 | cnt = 1024; |
| 335 | |
| 336 | addr = vmalloc(cnt); |
| 337 | if (!addr) { |
| 338 | dev_info(&dd->pcidev->dev, |
| 339 | "Couldn't get memory for checking PIO perf," |
| 340 | " skipping\n"); |
| 341 | goto done; |
| 342 | } |
| 343 | |
| 344 | preempt_disable(); /* we want reasonably accurate elapsed time */ |
| 345 | msecs = 1 + jiffies_to_msecs(jiffies); |
| 346 | for (lcnt = 0; lcnt < 10000U; lcnt++) { |
| 347 | /* wait until we cross msec boundary */ |
| 348 | if (jiffies_to_msecs(jiffies) >= msecs) |
| 349 | break; |
| 350 | udelay(1); |
| 351 | } |
| 352 | |
Dave Olson | 6ac5072 | 2007-08-09 03:11:38 -0700 | [diff] [blame] | 353 | ipath_disable_armlaunch(dd); |
| 354 | |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 355 | /* |
| 356 | * length 0, no dwords actually sent, and mark as VL15 |
| 357 | * on chips where that may matter (due to IB flowcontrol) |
| 358 | */ |
| 359 | if ((dd->ipath_flags & IPATH_HAS_PBC_CNT)) |
| 360 | writeq(1UL << 63, piobuf); |
| 361 | else |
| 362 | writeq(0, piobuf); |
Dave Olson | 9bec399 | 2007-06-01 13:01:47 -0700 | [diff] [blame] | 363 | ipath_flush_wc(); |
| 364 | |
| 365 | /* |
| 366 | * this is only roughly accurate, since even with preempt we |
| 367 | * still take interrupts that could take a while. Running for |
| 368 | * >= 5 msec seems to get us "close enough" to accurate values |
| 369 | */ |
| 370 | msecs = jiffies_to_msecs(jiffies); |
| 371 | for (emsecs = lcnt = 0; emsecs <= 5UL; lcnt++) { |
| 372 | __iowrite32_copy(piobuf + 64, addr, cnt >> 2); |
| 373 | emsecs = jiffies_to_msecs(jiffies) - msecs; |
| 374 | } |
| 375 | |
| 376 | /* 1 GiB/sec, slightly over IB SDR line rate */ |
| 377 | if (lcnt < (emsecs * 1024U)) |
| 378 | ipath_dev_err(dd, |
| 379 | "Performance problem: bandwidth to PIO buffers is " |
| 380 | "only %u MiB/sec\n", |
| 381 | lcnt / (u32) emsecs); |
| 382 | else |
| 383 | ipath_dbg("PIO buffer bandwidth %u MiB/sec is OK\n", |
| 384 | lcnt / (u32) emsecs); |
| 385 | |
| 386 | preempt_enable(); |
| 387 | |
| 388 | vfree(addr); |
| 389 | |
| 390 | done: |
| 391 | /* disarm piobuf, so it's available again */ |
| 392 | ipath_disarm_piobufs(dd, pbnum, 1); |
Dave Olson | 6ac5072 | 2007-08-09 03:11:38 -0700 | [diff] [blame] | 393 | ipath_enable_armlaunch(dd); |
Dave Olson | 9bec399 | 2007-06-01 13:01:47 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 396 | static int __devinit ipath_init_one(struct pci_dev *pdev, |
| 397 | const struct pci_device_id *ent) |
| 398 | { |
| 399 | int ret, len, j; |
| 400 | struct ipath_devdata *dd; |
| 401 | unsigned long long addr; |
| 402 | u32 bar0 = 0, bar1 = 0; |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 403 | u8 rev; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 404 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 405 | dd = ipath_alloc_devdata(pdev); |
| 406 | if (IS_ERR(dd)) { |
| 407 | ret = PTR_ERR(dd); |
| 408 | printk(KERN_ERR IPATH_DRV_NAME |
| 409 | ": Could not allocate devdata: error %d\n", -ret); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 410 | goto bail; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | ipath_cdbg(VERBOSE, "initializing unit #%u\n", dd->ipath_unit); |
| 414 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 415 | ret = pci_enable_device(pdev); |
| 416 | if (ret) { |
| 417 | /* This can happen iff: |
| 418 | * |
| 419 | * We did a chip reset, and then failed to reprogram the |
| 420 | * BAR, or the chip reset due to an internal error. We then |
| 421 | * unloaded the driver and reloaded it. |
| 422 | * |
| 423 | * Both reset cases set the BAR back to initial state. For |
| 424 | * the latter case, the AER sticky error bit at offset 0x718 |
| 425 | * should be set, but the Linux kernel doesn't yet know |
| 426 | * about that, it appears. If the original BAR was retained |
| 427 | * in the kernel data structures, this may be OK. |
| 428 | */ |
| 429 | ipath_dev_err(dd, "enable unit %d failed: error %d\n", |
| 430 | dd->ipath_unit, -ret); |
| 431 | goto bail_devdata; |
| 432 | } |
| 433 | addr = pci_resource_start(pdev, 0); |
| 434 | len = pci_resource_len(pdev, 0); |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 435 | ipath_cdbg(VERBOSE, "regbase (0) %llx len %d irq %d, vend %x/%x " |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 436 | "driver_data %lx\n", addr, len, pdev->irq, ent->vendor, |
| 437 | ent->device, ent->driver_data); |
| 438 | |
| 439 | read_bars(dd, pdev, &bar0, &bar1); |
| 440 | |
| 441 | if (!bar1 && !(bar0 & ~0xf)) { |
| 442 | if (addr) { |
| 443 | dev_info(&pdev->dev, "BAR is 0 (probable RESET), " |
| 444 | "rewriting as %llx\n", addr); |
| 445 | ret = pci_write_config_dword( |
| 446 | pdev, PCI_BASE_ADDRESS_0, addr); |
| 447 | if (ret) { |
| 448 | ipath_dev_err(dd, "rewrite of BAR0 " |
| 449 | "failed: err %d\n", -ret); |
| 450 | goto bail_disable; |
| 451 | } |
| 452 | ret = pci_write_config_dword( |
| 453 | pdev, PCI_BASE_ADDRESS_1, addr >> 32); |
| 454 | if (ret) { |
| 455 | ipath_dev_err(dd, "rewrite of BAR1 " |
| 456 | "failed: err %d\n", -ret); |
| 457 | goto bail_disable; |
| 458 | } |
| 459 | } else { |
| 460 | ipath_dev_err(dd, "BAR is 0 (probable RESET), " |
| 461 | "not usable until reboot\n"); |
| 462 | ret = -ENODEV; |
| 463 | goto bail_disable; |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | ret = pci_request_regions(pdev, IPATH_DRV_NAME); |
| 468 | if (ret) { |
| 469 | dev_info(&pdev->dev, "pci_request_regions unit %u fails: " |
| 470 | "err %d\n", dd->ipath_unit, -ret); |
| 471 | goto bail_disable; |
| 472 | } |
| 473 | |
Yang Hongyang | 6a35528 | 2009-04-06 19:01:13 -0700 | [diff] [blame] | 474 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 475 | if (ret) { |
Bryan O'Sullivan | 68dd43a | 2006-04-24 14:22:58 -0700 | [diff] [blame] | 476 | /* |
| 477 | * if the 64 bit setup fails, try 32 bit. Some systems |
| 478 | * do not setup 64 bit maps on systems with 2GB or less |
| 479 | * memory installed. |
| 480 | */ |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 481 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
Bryan O'Sullivan | 68dd43a | 2006-04-24 14:22:58 -0700 | [diff] [blame] | 482 | if (ret) { |
Bryan O'Sullivan | b1d8865 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 483 | dev_info(&pdev->dev, |
| 484 | "Unable to set DMA mask for unit %u: %d\n", |
| 485 | dd->ipath_unit, ret); |
Bryan O'Sullivan | 68dd43a | 2006-04-24 14:22:58 -0700 | [diff] [blame] | 486 | goto bail_regions; |
| 487 | } |
Bryan O'Sullivan | b1d8865 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 488 | else { |
Bryan O'Sullivan | 68dd43a | 2006-04-24 14:22:58 -0700 | [diff] [blame] | 489 | ipath_dbg("No 64bit DMA mask, used 32 bit mask\n"); |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 490 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
Bryan O'Sullivan | b1d8865 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 491 | if (ret) |
| 492 | dev_info(&pdev->dev, |
| 493 | "Unable to set DMA consistent mask " |
| 494 | "for unit %u: %d\n", |
| 495 | dd->ipath_unit, ret); |
| 496 | |
| 497 | } |
| 498 | } |
| 499 | else { |
Yang Hongyang | 6a35528 | 2009-04-06 19:01:13 -0700 | [diff] [blame] | 500 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
Bryan O'Sullivan | b1d8865 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 501 | if (ret) |
| 502 | dev_info(&pdev->dev, |
| 503 | "Unable to set DMA consistent mask " |
| 504 | "for unit %u: %d\n", |
| 505 | dd->ipath_unit, ret); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | pci_set_master(pdev); |
| 509 | |
| 510 | /* |
| 511 | * Save BARs to rewrite after device reset. Save all 64 bits of |
| 512 | * BAR, just in case. |
| 513 | */ |
| 514 | dd->ipath_pcibar0 = addr; |
| 515 | dd->ipath_pcibar1 = addr >> 32; |
| 516 | dd->ipath_deviceid = ent->device; /* save for later use */ |
| 517 | dd->ipath_vendorid = ent->vendor; |
| 518 | |
| 519 | /* setup the chip-specific functions, as early as possible. */ |
| 520 | switch (ent->device) { |
| 521 | case PCI_DEVICE_ID_INFINIPATH_HT: |
Bryan O'Sullivan | 820054b | 2007-03-15 14:45:06 -0700 | [diff] [blame] | 522 | #ifdef CONFIG_HT_IRQ |
Bryan O'Sullivan | 525d0ca | 2006-08-25 11:24:39 -0700 | [diff] [blame] | 523 | ipath_init_iba6110_funcs(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 524 | break; |
Bryan O'Sullivan | 820054b | 2007-03-15 14:45:06 -0700 | [diff] [blame] | 525 | #else |
| 526 | ipath_dev_err(dd, "QLogic HT device 0x%x cannot work if " |
| 527 | "CONFIG_HT_IRQ is not enabled\n", ent->device); |
| 528 | return -ENODEV; |
Bryan O'Sullivan | e757bef | 2006-11-16 01:19:19 -0800 | [diff] [blame] | 529 | #endif |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 530 | case PCI_DEVICE_ID_INFINIPATH_PE800: |
Bryan O'Sullivan | 820054b | 2007-03-15 14:45:06 -0700 | [diff] [blame] | 531 | #ifdef CONFIG_PCI_MSI |
Bryan O'Sullivan | 525d0ca | 2006-08-25 11:24:39 -0700 | [diff] [blame] | 532 | ipath_init_iba6120_funcs(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 533 | break; |
Bryan O'Sullivan | 820054b | 2007-03-15 14:45:06 -0700 | [diff] [blame] | 534 | #else |
| 535 | ipath_dev_err(dd, "QLogic PCIE device 0x%x cannot work if " |
| 536 | "CONFIG_PCI_MSI is not enabled\n", ent->device); |
| 537 | return -ENODEV; |
Bryan O'Sullivan | e757bef | 2006-11-16 01:19:19 -0800 | [diff] [blame] | 538 | #endif |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 539 | case PCI_DEVICE_ID_INFINIPATH_7220: |
| 540 | #ifndef CONFIG_PCI_MSI |
| 541 | ipath_dbg("CONFIG_PCI_MSI is not enabled, " |
Roland Dreier | bc751fe | 2008-04-21 18:19:15 -0700 | [diff] [blame] | 542 | "using INTx for unit %u\n", dd->ipath_unit); |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 543 | #endif |
| 544 | ipath_init_iba7220_funcs(dd); |
| 545 | break; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 546 | default: |
Bryan O'Sullivan | 759d576 | 2006-07-01 04:35:49 -0700 | [diff] [blame] | 547 | ipath_dev_err(dd, "Found unknown QLogic deviceid 0x%x, " |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 548 | "failing\n", ent->device); |
| 549 | return -ENODEV; |
| 550 | } |
| 551 | |
| 552 | for (j = 0; j < 6; j++) { |
| 553 | if (!pdev->resource[j].start) |
| 554 | continue; |
Greg Kroah-Hartman | e29419f | 2006-06-12 15:20:16 -0700 | [diff] [blame] | 555 | ipath_cdbg(VERBOSE, "BAR %d start %llx, end %llx, len %llx\n", |
| 556 | j, (unsigned long long)pdev->resource[j].start, |
| 557 | (unsigned long long)pdev->resource[j].end, |
| 558 | (unsigned long long)pci_resource_len(pdev, j)); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | if (!addr) { |
| 562 | ipath_dev_err(dd, "No valid address in BAR 0!\n"); |
| 563 | ret = -ENODEV; |
| 564 | goto bail_regions; |
| 565 | } |
| 566 | |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 567 | ret = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev); |
| 568 | if (ret) { |
| 569 | ipath_dev_err(dd, "Failed to read PCI revision ID unit " |
| 570 | "%u: err %d\n", dd->ipath_unit, -ret); |
| 571 | goto bail_regions; /* shouldn't ever happen */ |
| 572 | } |
| 573 | dd->ipath_pcirev = rev; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 574 | |
Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 575 | #if defined(__powerpc__) |
| 576 | /* There isn't a generic way to specify writethrough mappings */ |
| 577 | dd->ipath_kregbase = __ioremap(addr, len, |
| 578 | (_PAGE_NO_CACHE|_PAGE_WRITETHRU)); |
| 579 | #else |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 580 | dd->ipath_kregbase = ioremap_nocache(addr, len); |
Bryan O'Sullivan | eb9dc6f | 2006-08-25 11:24:26 -0700 | [diff] [blame] | 581 | #endif |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 582 | |
| 583 | if (!dd->ipath_kregbase) { |
| 584 | ipath_dbg("Unable to map io addr %llx to kvirt, failing\n", |
| 585 | addr); |
| 586 | ret = -ENOMEM; |
| 587 | goto bail_iounmap; |
| 588 | } |
| 589 | dd->ipath_kregend = (u64 __iomem *) |
| 590 | ((void __iomem *)dd->ipath_kregbase + len); |
| 591 | dd->ipath_physaddr = addr; /* used for io_remap, etc. */ |
| 592 | /* for user mmap */ |
Bryan O'Sullivan | b35f004 | 2006-07-01 04:35:59 -0700 | [diff] [blame] | 593 | ipath_cdbg(VERBOSE, "mapped io addr %llx to kregbase %p\n", |
| 594 | addr, dd->ipath_kregbase); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 595 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 596 | if (dd->ipath_f_bus(dd, pdev)) |
| 597 | ipath_dev_err(dd, "Failed to setup config space; " |
| 598 | "continuing anyway\n"); |
| 599 | |
| 600 | /* |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 601 | * set up our interrupt handler; IRQF_SHARED probably not needed, |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 602 | * since MSI interrupts shouldn't be shared but won't hurt for now. |
| 603 | * check 0 irq after we return from chip-specific bus setup, since |
| 604 | * that can affect this due to setup |
| 605 | */ |
Bryan O'Sullivan | 51f65eb | 2006-11-08 17:44:58 -0800 | [diff] [blame] | 606 | if (!dd->ipath_irq) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 607 | ipath_dev_err(dd, "irq is 0, BIOS error? Interrupts won't " |
| 608 | "work\n"); |
| 609 | else { |
Bryan O'Sullivan | 51f65eb | 2006-11-08 17:44:58 -0800 | [diff] [blame] | 610 | ret = request_irq(dd->ipath_irq, ipath_intr, IRQF_SHARED, |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 611 | IPATH_DRV_NAME, dd); |
| 612 | if (ret) { |
| 613 | ipath_dev_err(dd, "Couldn't setup irq handler, " |
Bryan O'Sullivan | 51f65eb | 2006-11-08 17:44:58 -0800 | [diff] [blame] | 614 | "irq=%d: %d\n", dd->ipath_irq, ret); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 615 | goto bail_iounmap; |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | ret = ipath_init_chip(dd, 0); /* do the chip-specific init */ |
| 620 | if (ret) |
Arthur Jones | 7b196e2 | 2007-03-15 14:45:04 -0700 | [diff] [blame] | 621 | goto bail_irqsetup; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 622 | |
| 623 | ret = ipath_enable_wc(dd); |
| 624 | |
| 625 | if (ret) { |
| 626 | ipath_dev_err(dd, "Write combining not enabled " |
| 627 | "(err %d): performance may be poor\n", |
| 628 | -ret); |
| 629 | ret = 0; |
| 630 | } |
| 631 | |
Dave Olson | 9bec399 | 2007-06-01 13:01:47 -0700 | [diff] [blame] | 632 | ipath_verify_pioperf(dd); |
| 633 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 634 | ipath_device_create_group(&pdev->dev, dd); |
| 635 | ipathfs_add_device(dd); |
| 636 | ipath_user_add(dd); |
Bryan O'Sullivan | a2acb2f | 2006-07-01 04:35:52 -0700 | [diff] [blame] | 637 | ipath_diag_add(dd); |
Bryan O'Sullivan | b1c1b6a | 2006-08-25 11:24:31 -0700 | [diff] [blame] | 638 | ipath_register_ib_device(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 639 | |
| 640 | goto bail; |
| 641 | |
Arthur Jones | 7b196e2 | 2007-03-15 14:45:04 -0700 | [diff] [blame] | 642 | bail_irqsetup: |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 643 | if (pdev->irq) |
| 644 | free_irq(pdev->irq, dd); |
Arthur Jones | 7b196e2 | 2007-03-15 14:45:04 -0700 | [diff] [blame] | 645 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 646 | bail_iounmap: |
| 647 | iounmap((volatile void __iomem *) dd->ipath_kregbase); |
| 648 | |
| 649 | bail_regions: |
| 650 | pci_release_regions(pdev); |
| 651 | |
| 652 | bail_disable: |
| 653 | pci_disable_device(pdev); |
| 654 | |
| 655 | bail_devdata: |
| 656 | ipath_free_devdata(pdev, dd); |
| 657 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 658 | bail: |
| 659 | return ret; |
| 660 | } |
| 661 | |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 662 | static void __devexit cleanup_device(struct ipath_devdata *dd) |
| 663 | { |
| 664 | int port; |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 665 | struct ipath_portdata **tmp; |
| 666 | unsigned long flags; |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 667 | |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 668 | if (*dd->ipath_statusp & IPATH_STATUS_CHIP_PRESENT) { |
| 669 | /* can't do anything more with chip; needs re-init */ |
| 670 | *dd->ipath_statusp &= ~IPATH_STATUS_CHIP_PRESENT; |
| 671 | if (dd->ipath_kregbase) { |
| 672 | /* |
| 673 | * if we haven't already cleaned up before these are |
| 674 | * to ensure any register reads/writes "fail" until |
| 675 | * re-init |
| 676 | */ |
| 677 | dd->ipath_kregbase = NULL; |
| 678 | dd->ipath_uregbase = 0; |
| 679 | dd->ipath_sregbase = 0; |
| 680 | dd->ipath_cregbase = 0; |
| 681 | dd->ipath_kregsize = 0; |
| 682 | } |
| 683 | ipath_disable_wc(dd); |
| 684 | } |
| 685 | |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 686 | if (dd->ipath_spectriggerhit) |
| 687 | dev_info(&dd->pcidev->dev, "%lu special trigger hits\n", |
| 688 | dd->ipath_spectriggerhit); |
| 689 | |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 690 | if (dd->ipath_pioavailregs_dma) { |
| 691 | dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE, |
| 692 | (void *) dd->ipath_pioavailregs_dma, |
| 693 | dd->ipath_pioavailregs_phys); |
| 694 | dd->ipath_pioavailregs_dma = NULL; |
| 695 | } |
| 696 | if (dd->ipath_dummy_hdrq) { |
| 697 | dma_free_coherent(&dd->pcidev->dev, |
| 698 | dd->ipath_pd[0]->port_rcvhdrq_size, |
| 699 | dd->ipath_dummy_hdrq, dd->ipath_dummy_hdrq_phys); |
| 700 | dd->ipath_dummy_hdrq = NULL; |
| 701 | } |
| 702 | |
| 703 | if (dd->ipath_pageshadow) { |
| 704 | struct page **tmpp = dd->ipath_pageshadow; |
| 705 | dma_addr_t *tmpd = dd->ipath_physshadow; |
| 706 | int i, cnt = 0; |
| 707 | |
| 708 | ipath_cdbg(VERBOSE, "Unlocking any expTID pages still " |
| 709 | "locked\n"); |
| 710 | for (port = 0; port < dd->ipath_cfgports; port++) { |
| 711 | int port_tidbase = port * dd->ipath_rcvtidcnt; |
| 712 | int maxtid = port_tidbase + dd->ipath_rcvtidcnt; |
| 713 | for (i = port_tidbase; i < maxtid; i++) { |
| 714 | if (!tmpp[i]) |
| 715 | continue; |
| 716 | pci_unmap_page(dd->pcidev, tmpd[i], |
| 717 | PAGE_SIZE, PCI_DMA_FROMDEVICE); |
| 718 | ipath_release_user_pages(&tmpp[i], 1); |
| 719 | tmpp[i] = NULL; |
| 720 | cnt++; |
| 721 | } |
| 722 | } |
| 723 | if (cnt) { |
| 724 | ipath_stats.sps_pageunlocks += cnt; |
| 725 | ipath_cdbg(VERBOSE, "There were still %u expTID " |
| 726 | "entries locked\n", cnt); |
| 727 | } |
| 728 | if (ipath_stats.sps_pagelocks || |
| 729 | ipath_stats.sps_pageunlocks) |
| 730 | ipath_cdbg(VERBOSE, "%llu pages locked, %llu " |
| 731 | "unlocked via ipath_m{un}lock\n", |
| 732 | (unsigned long long) |
| 733 | ipath_stats.sps_pagelocks, |
| 734 | (unsigned long long) |
| 735 | ipath_stats.sps_pageunlocks); |
| 736 | |
| 737 | ipath_cdbg(VERBOSE, "Free shadow page tid array at %p\n", |
| 738 | dd->ipath_pageshadow); |
Bryan O'Sullivan | 9783ab4 | 2007-03-15 14:45:07 -0700 | [diff] [blame] | 739 | tmpp = dd->ipath_pageshadow; |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 740 | dd->ipath_pageshadow = NULL; |
Bryan O'Sullivan | 9783ab4 | 2007-03-15 14:45:07 -0700 | [diff] [blame] | 741 | vfree(tmpp); |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 742 | |
| 743 | dd->ipath_egrtidbase = NULL; |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | /* |
| 747 | * free any resources still in use (usually just kernel ports) |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 748 | * at unload; we do for portcnt, because that's what we allocate. |
| 749 | * We acquire lock to be really paranoid that ipath_pd isn't being |
| 750 | * accessed from some interrupt-related code (that should not happen, |
| 751 | * but best to be sure). |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 752 | */ |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 753 | spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); |
| 754 | tmp = dd->ipath_pd; |
| 755 | dd->ipath_pd = NULL; |
| 756 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 757 | for (port = 0; port < dd->ipath_portcnt; port++) { |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 758 | struct ipath_portdata *pd = tmp[port]; |
| 759 | tmp[port] = NULL; /* debugging paranoia */ |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 760 | ipath_free_pddata(dd, pd); |
| 761 | } |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 762 | kfree(tmp); |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 763 | } |
| 764 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 765 | static void __devexit ipath_remove_one(struct pci_dev *pdev) |
| 766 | { |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 767 | struct ipath_devdata *dd = pci_get_drvdata(pdev); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 768 | |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 769 | ipath_cdbg(VERBOSE, "removing, pdev=%p, dd=%p\n", pdev, dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 770 | |
Bryan O'Sullivan | 53c1d2c | 2007-03-15 14:45:11 -0700 | [diff] [blame] | 771 | /* |
| 772 | * disable the IB link early, to be sure no new packets arrive, which |
| 773 | * complicates the shutdown process |
| 774 | */ |
| 775 | ipath_shutdown_device(dd); |
| 776 | |
Arthur Jones | 3588423 | 2007-07-06 12:48:53 -0700 | [diff] [blame] | 777 | flush_scheduled_work(); |
| 778 | |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 779 | if (dd->verbs_dev) |
Bryan O'Sullivan | c78f641 | 2006-09-28 09:00:01 -0700 | [diff] [blame] | 780 | ipath_unregister_ib_device(dd->verbs_dev); |
Bryan O'Sullivan | c78f641 | 2006-09-28 09:00:01 -0700 | [diff] [blame] | 781 | |
Bryan O'Sullivan | a2acb2f | 2006-07-01 04:35:52 -0700 | [diff] [blame] | 782 | ipath_diag_remove(dd); |
| 783 | ipath_user_remove(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 784 | ipathfs_remove_device(dd); |
| 785 | ipath_device_remove_group(&pdev->dev, dd); |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 786 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 787 | ipath_cdbg(VERBOSE, "Releasing pci memory regions, dd %p, " |
| 788 | "unit %u\n", dd, (u32) dd->ipath_unit); |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 789 | |
| 790 | cleanup_device(dd); |
| 791 | |
| 792 | /* |
| 793 | * turn off rcv, send, and interrupts for all ports, all drivers |
| 794 | * should also hard reset the chip here? |
| 795 | * free up port 0 (kernel) rcvhdr, egr bufs, and eventually tid bufs |
| 796 | * for all versions of the driver, if they were allocated |
| 797 | */ |
Bryan O'Sullivan | 51f65eb | 2006-11-08 17:44:58 -0800 | [diff] [blame] | 798 | if (dd->ipath_irq) { |
| 799 | ipath_cdbg(VERBOSE, "unit %u free irq %d\n", |
| 800 | dd->ipath_unit, dd->ipath_irq); |
| 801 | dd->ipath_f_free_irq(dd); |
Bryan O'Sullivan | 7227aac | 2006-09-28 09:00:16 -0700 | [diff] [blame] | 802 | } else |
| 803 | ipath_dbg("irq is 0, not doing free_irq " |
| 804 | "for unit %u\n", dd->ipath_unit); |
| 805 | /* |
| 806 | * we check for NULL here, because it's outside |
| 807 | * the kregbase check, and we need to call it |
| 808 | * after the free_irq. Thus it's possible that |
| 809 | * the function pointers were never initialized. |
| 810 | */ |
| 811 | if (dd->ipath_f_cleanup) |
| 812 | /* clean up chip-specific stuff */ |
| 813 | dd->ipath_f_cleanup(dd); |
| 814 | |
| 815 | ipath_cdbg(VERBOSE, "Unmapping kregbase %p\n", dd->ipath_kregbase); |
| 816 | iounmap((volatile void __iomem *) dd->ipath_kregbase); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 817 | pci_release_regions(pdev); |
| 818 | ipath_cdbg(VERBOSE, "calling pci_disable_device\n"); |
| 819 | pci_disable_device(pdev); |
| 820 | |
| 821 | ipath_free_devdata(pdev, dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | /* general driver use */ |
| 825 | DEFINE_MUTEX(ipath_mutex); |
| 826 | |
| 827 | static DEFINE_SPINLOCK(ipath_pioavail_lock); |
| 828 | |
| 829 | /** |
| 830 | * ipath_disarm_piobufs - cancel a range of PIO buffers |
| 831 | * @dd: the infinipath device |
| 832 | * @first: the first PIO buffer to cancel |
| 833 | * @cnt: the number of PIO buffers to cancel |
| 834 | * |
| 835 | * cancel a range of PIO buffers, used when they might be armed, but |
| 836 | * not triggered. Used at init to ensure buffer state, and also user |
| 837 | * process close, in case it died while writing to a PIO buffer |
| 838 | * Also after errors. |
| 839 | */ |
| 840 | void ipath_disarm_piobufs(struct ipath_devdata *dd, unsigned first, |
| 841 | unsigned cnt) |
| 842 | { |
| 843 | unsigned i, last = first + cnt; |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 844 | unsigned long flags; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 845 | |
| 846 | ipath_cdbg(PKT, "disarm %u PIObufs first=%u\n", cnt, first); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 847 | for (i = first; i < last; i++) { |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 848 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
| 849 | /* |
| 850 | * The disarm-related bits are write-only, so it |
| 851 | * is ok to OR them in with our copy of sendctrl |
| 852 | * while we hold the lock. |
| 853 | */ |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 854 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 855 | dd->ipath_sendctrl | INFINIPATH_S_DISARM | |
| 856 | (i << INFINIPATH_S_DISARMPIOBUF_SHIFT)); |
| 857 | /* can't disarm bufs back-to-back per iba7220 spec */ |
| 858 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 859 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 860 | } |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 861 | /* on some older chips, update may not happen after cancel */ |
| 862 | ipath_force_pio_avail_update(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 863 | } |
| 864 | |
| 865 | /** |
| 866 | * ipath_wait_linkstate - wait for an IB link state change to occur |
| 867 | * @dd: the infinipath device |
| 868 | * @state: the state to wait for |
| 869 | * @msecs: the number of milliseconds to wait |
| 870 | * |
| 871 | * wait up to msecs milliseconds for IB link state change to occur for |
| 872 | * now, take the easy polling route. Currently used only by |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 873 | * ipath_set_linkstate. Returns 0 if state reached, otherwise |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 874 | * -ETIMEDOUT state can have multiple states set, for any of several |
| 875 | * transitions. |
| 876 | */ |
Ralph Campbell | 140277e | 2007-12-14 01:53:56 -0800 | [diff] [blame] | 877 | int ipath_wait_linkstate(struct ipath_devdata *dd, u32 state, int msecs) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 878 | { |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 879 | dd->ipath_state_wanted = state; |
| 880 | wait_event_interruptible_timeout(ipath_state_wait, |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 881 | (dd->ipath_flags & state), |
| 882 | msecs_to_jiffies(msecs)); |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 883 | dd->ipath_state_wanted = 0; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 884 | |
| 885 | if (!(dd->ipath_flags & state)) { |
| 886 | u64 val; |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 887 | ipath_cdbg(VERBOSE, "Didn't reach linkstate %s within %u" |
| 888 | " ms\n", |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 889 | /* test INIT ahead of DOWN, both can be set */ |
| 890 | (state & IPATH_LINKINIT) ? "INIT" : |
| 891 | ((state & IPATH_LINKDOWN) ? "DOWN" : |
| 892 | ((state & IPATH_LINKARMED) ? "ARM" : "ACTIVE")), |
| 893 | msecs); |
| 894 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); |
| 895 | ipath_cdbg(VERBOSE, "ibcc=%llx ibcstatus=%llx (%s)\n", |
| 896 | (unsigned long long) ipath_read_kreg64( |
| 897 | dd, dd->ipath_kregs->kr_ibcctrl), |
| 898 | (unsigned long long) val, |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 899 | ipath_ibcstatus_str[val & dd->ibcs_lts_mask]); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 900 | } |
| 901 | return (dd->ipath_flags & state) ? 0 : -ETIMEDOUT; |
| 902 | } |
| 903 | |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 904 | static void decode_sdma_errs(struct ipath_devdata *dd, ipath_err_t err, |
| 905 | char *buf, size_t blen) |
| 906 | { |
| 907 | static const struct { |
| 908 | ipath_err_t err; |
| 909 | const char *msg; |
| 910 | } errs[] = { |
| 911 | { INFINIPATH_E_SDMAGENMISMATCH, "SDmaGenMismatch" }, |
| 912 | { INFINIPATH_E_SDMAOUTOFBOUND, "SDmaOutOfBound" }, |
| 913 | { INFINIPATH_E_SDMATAILOUTOFBOUND, "SDmaTailOutOfBound" }, |
| 914 | { INFINIPATH_E_SDMABASE, "SDmaBase" }, |
| 915 | { INFINIPATH_E_SDMA1STDESC, "SDma1stDesc" }, |
| 916 | { INFINIPATH_E_SDMARPYTAG, "SDmaRpyTag" }, |
| 917 | { INFINIPATH_E_SDMADWEN, "SDmaDwEn" }, |
| 918 | { INFINIPATH_E_SDMAMISSINGDW, "SDmaMissingDw" }, |
| 919 | { INFINIPATH_E_SDMAUNEXPDATA, "SDmaUnexpData" }, |
| 920 | { INFINIPATH_E_SDMADESCADDRMISALIGN, "SDmaDescAddrMisalign" }, |
| 921 | { INFINIPATH_E_SENDBUFMISUSE, "SendBufMisuse" }, |
| 922 | { INFINIPATH_E_SDMADISABLED, "SDmaDisabled" }, |
| 923 | }; |
| 924 | int i; |
| 925 | int expected; |
| 926 | size_t bidx = 0; |
| 927 | |
| 928 | for (i = 0; i < ARRAY_SIZE(errs); i++) { |
| 929 | expected = (errs[i].err != INFINIPATH_E_SDMADISABLED) ? 0 : |
| 930 | test_bit(IPATH_SDMA_ABORTING, &dd->ipath_sdma_status); |
| 931 | if ((err & errs[i].err) && !expected) |
| 932 | bidx += snprintf(buf + bidx, blen - bidx, |
| 933 | "%s ", errs[i].msg); |
| 934 | } |
| 935 | } |
| 936 | |
Bryan O'Sullivan | 8ec1077 | 2007-03-15 14:44:55 -0700 | [diff] [blame] | 937 | /* |
| 938 | * Decode the error status into strings, deciding whether to always |
| 939 | * print * it or not depending on "normal packet errors" vs everything |
| 940 | * else. Return 1 if "real" errors, otherwise 0 if only packet |
| 941 | * errors, so caller can decide what to print with the string. |
| 942 | */ |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 943 | int ipath_decode_err(struct ipath_devdata *dd, char *buf, size_t blen, |
| 944 | ipath_err_t err) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 945 | { |
Bryan O'Sullivan | 8ec1077 | 2007-03-15 14:44:55 -0700 | [diff] [blame] | 946 | int iserr = 1; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 947 | *buf = '\0'; |
Bryan O'Sullivan | 8ec1077 | 2007-03-15 14:44:55 -0700 | [diff] [blame] | 948 | if (err & INFINIPATH_E_PKTERRS) { |
| 949 | if (!(err & ~INFINIPATH_E_PKTERRS)) |
| 950 | iserr = 0; // if only packet errors. |
| 951 | if (ipath_debug & __IPATH_ERRPKTDBG) { |
| 952 | if (err & INFINIPATH_E_REBP) |
| 953 | strlcat(buf, "EBP ", blen); |
| 954 | if (err & INFINIPATH_E_RVCRC) |
| 955 | strlcat(buf, "VCRC ", blen); |
| 956 | if (err & INFINIPATH_E_RICRC) { |
| 957 | strlcat(buf, "CRC ", blen); |
| 958 | // clear for check below, so only once |
| 959 | err &= INFINIPATH_E_RICRC; |
| 960 | } |
| 961 | if (err & INFINIPATH_E_RSHORTPKTLEN) |
| 962 | strlcat(buf, "rshortpktlen ", blen); |
| 963 | if (err & INFINIPATH_E_SDROPPEDDATAPKT) |
| 964 | strlcat(buf, "sdroppeddatapkt ", blen); |
| 965 | if (err & INFINIPATH_E_SPKTLEN) |
| 966 | strlcat(buf, "spktlen ", blen); |
| 967 | } |
| 968 | if ((err & INFINIPATH_E_RICRC) && |
| 969 | !(err&(INFINIPATH_E_RVCRC|INFINIPATH_E_REBP))) |
| 970 | strlcat(buf, "CRC ", blen); |
| 971 | if (!iserr) |
| 972 | goto done; |
| 973 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 974 | if (err & INFINIPATH_E_RHDRLEN) |
| 975 | strlcat(buf, "rhdrlen ", blen); |
| 976 | if (err & INFINIPATH_E_RBADTID) |
| 977 | strlcat(buf, "rbadtid ", blen); |
| 978 | if (err & INFINIPATH_E_RBADVERSION) |
| 979 | strlcat(buf, "rbadversion ", blen); |
| 980 | if (err & INFINIPATH_E_RHDR) |
| 981 | strlcat(buf, "rhdr ", blen); |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 982 | if (err & INFINIPATH_E_SENDSPECIALTRIGGER) |
| 983 | strlcat(buf, "sendspecialtrigger ", blen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 984 | if (err & INFINIPATH_E_RLONGPKTLEN) |
| 985 | strlcat(buf, "rlongpktlen ", blen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 986 | if (err & INFINIPATH_E_RMAXPKTLEN) |
| 987 | strlcat(buf, "rmaxpktlen ", blen); |
| 988 | if (err & INFINIPATH_E_RMINPKTLEN) |
| 989 | strlcat(buf, "rminpktlen ", blen); |
Bryan O'Sullivan | 8ec1077 | 2007-03-15 14:44:55 -0700 | [diff] [blame] | 990 | if (err & INFINIPATH_E_SMINPKTLEN) |
| 991 | strlcat(buf, "sminpktlen ", blen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 992 | if (err & INFINIPATH_E_RFORMATERR) |
| 993 | strlcat(buf, "rformaterr ", blen); |
| 994 | if (err & INFINIPATH_E_RUNSUPVL) |
| 995 | strlcat(buf, "runsupvl ", blen); |
| 996 | if (err & INFINIPATH_E_RUNEXPCHAR) |
| 997 | strlcat(buf, "runexpchar ", blen); |
| 998 | if (err & INFINIPATH_E_RIBFLOW) |
| 999 | strlcat(buf, "ribflow ", blen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1000 | if (err & INFINIPATH_E_SUNDERRUN) |
| 1001 | strlcat(buf, "sunderrun ", blen); |
| 1002 | if (err & INFINIPATH_E_SPIOARMLAUNCH) |
| 1003 | strlcat(buf, "spioarmlaunch ", blen); |
| 1004 | if (err & INFINIPATH_E_SUNEXPERRPKTNUM) |
| 1005 | strlcat(buf, "sunexperrpktnum ", blen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1006 | if (err & INFINIPATH_E_SDROPPEDSMPPKT) |
| 1007 | strlcat(buf, "sdroppedsmppkt ", blen); |
| 1008 | if (err & INFINIPATH_E_SMAXPKTLEN) |
| 1009 | strlcat(buf, "smaxpktlen ", blen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1010 | if (err & INFINIPATH_E_SUNSUPVL) |
| 1011 | strlcat(buf, "sunsupVL ", blen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1012 | if (err & INFINIPATH_E_INVALIDADDR) |
| 1013 | strlcat(buf, "invalidaddr ", blen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1014 | if (err & INFINIPATH_E_RRCVEGRFULL) |
| 1015 | strlcat(buf, "rcvegrfull ", blen); |
| 1016 | if (err & INFINIPATH_E_RRCVHDRFULL) |
| 1017 | strlcat(buf, "rcvhdrfull ", blen); |
| 1018 | if (err & INFINIPATH_E_IBSTATUSCHANGED) |
| 1019 | strlcat(buf, "ibcstatuschg ", blen); |
| 1020 | if (err & INFINIPATH_E_RIBLOSTLINK) |
| 1021 | strlcat(buf, "riblostlink ", blen); |
| 1022 | if (err & INFINIPATH_E_HARDWARE) |
| 1023 | strlcat(buf, "hardware ", blen); |
| 1024 | if (err & INFINIPATH_E_RESET) |
| 1025 | strlcat(buf, "reset ", blen); |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1026 | if (err & INFINIPATH_E_SDMAERRS) |
| 1027 | decode_sdma_errs(dd, err, buf, blen); |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 1028 | if (err & INFINIPATH_E_INVALIDEEPCMD) |
| 1029 | strlcat(buf, "invalideepromcmd ", blen); |
Bryan O'Sullivan | 8ec1077 | 2007-03-15 14:44:55 -0700 | [diff] [blame] | 1030 | done: |
| 1031 | return iserr; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | /** |
| 1035 | * get_rhf_errstring - decode RHF errors |
| 1036 | * @err: the err number |
| 1037 | * @msg: the output buffer |
| 1038 | * @len: the length of the output buffer |
| 1039 | * |
| 1040 | * only used one place now, may want more later |
| 1041 | */ |
| 1042 | static void get_rhf_errstring(u32 err, char *msg, size_t len) |
| 1043 | { |
| 1044 | /* if no errors, and so don't need to check what's first */ |
| 1045 | *msg = '\0'; |
| 1046 | |
| 1047 | if (err & INFINIPATH_RHF_H_ICRCERR) |
| 1048 | strlcat(msg, "icrcerr ", len); |
| 1049 | if (err & INFINIPATH_RHF_H_VCRCERR) |
| 1050 | strlcat(msg, "vcrcerr ", len); |
| 1051 | if (err & INFINIPATH_RHF_H_PARITYERR) |
| 1052 | strlcat(msg, "parityerr ", len); |
| 1053 | if (err & INFINIPATH_RHF_H_LENERR) |
| 1054 | strlcat(msg, "lenerr ", len); |
| 1055 | if (err & INFINIPATH_RHF_H_MTUERR) |
| 1056 | strlcat(msg, "mtuerr ", len); |
| 1057 | if (err & INFINIPATH_RHF_H_IHDRERR) |
| 1058 | /* infinipath hdr checksum error */ |
| 1059 | strlcat(msg, "ipathhdrerr ", len); |
| 1060 | if (err & INFINIPATH_RHF_H_TIDERR) |
| 1061 | strlcat(msg, "tiderr ", len); |
| 1062 | if (err & INFINIPATH_RHF_H_MKERR) |
| 1063 | /* bad port, offset, etc. */ |
| 1064 | strlcat(msg, "invalid ipathhdr ", len); |
| 1065 | if (err & INFINIPATH_RHF_H_IBERR) |
| 1066 | strlcat(msg, "iberr ", len); |
| 1067 | if (err & INFINIPATH_RHF_L_SWA) |
| 1068 | strlcat(msg, "swA ", len); |
| 1069 | if (err & INFINIPATH_RHF_L_SWB) |
| 1070 | strlcat(msg, "swB ", len); |
| 1071 | } |
| 1072 | |
| 1073 | /** |
| 1074 | * ipath_get_egrbuf - get an eager buffer |
| 1075 | * @dd: the infinipath device |
| 1076 | * @bufnum: the eager buffer to get |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1077 | * |
| 1078 | * must only be called if ipath_pd[port] is known to be allocated |
| 1079 | */ |
Ralph Campbell | d65708f | 2007-12-21 16:47:04 -0800 | [diff] [blame] | 1080 | static inline void *ipath_get_egrbuf(struct ipath_devdata *dd, u32 bufnum) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1081 | { |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1082 | return dd->ipath_port0_skbinfo ? |
| 1083 | (void *) dd->ipath_port0_skbinfo[bufnum].skb->data : NULL; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | /** |
| 1087 | * ipath_alloc_skb - allocate an skb and buffer with possible constraints |
| 1088 | * @dd: the infinipath device |
| 1089 | * @gfp_mask: the sk_buff SFP mask |
| 1090 | */ |
| 1091 | struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, |
| 1092 | gfp_t gfp_mask) |
| 1093 | { |
| 1094 | struct sk_buff *skb; |
| 1095 | u32 len; |
| 1096 | |
| 1097 | /* |
| 1098 | * Only fully supported way to handle this is to allocate lots |
| 1099 | * extra, align as needed, and then do skb_reserve(). That wastes |
| 1100 | * a lot of memory... I'll have to hack this into infinipath_copy |
| 1101 | * also. |
| 1102 | */ |
| 1103 | |
| 1104 | /* |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1105 | * We need 2 extra bytes for ipath_ether data sent in the |
| 1106 | * key header. In order to keep everything dword aligned, |
| 1107 | * we'll reserve 4 bytes. |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1108 | */ |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1109 | len = dd->ipath_ibmaxlen + 4; |
| 1110 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1111 | if (dd->ipath_flags & IPATH_4BYTE_TID) { |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1112 | /* We need a 2KB multiple alignment, and there is no way |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1113 | * to do it except to allocate extra and then skb_reserve |
| 1114 | * enough to bring it up to the right alignment. |
| 1115 | */ |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1116 | len += 2047; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1117 | } |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1118 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1119 | skb = __dev_alloc_skb(len, gfp_mask); |
| 1120 | if (!skb) { |
| 1121 | ipath_dev_err(dd, "Failed to allocate skbuff, length %u\n", |
| 1122 | len); |
| 1123 | goto bail; |
| 1124 | } |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1125 | |
| 1126 | skb_reserve(skb, 4); |
| 1127 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1128 | if (dd->ipath_flags & IPATH_4BYTE_TID) { |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1129 | u32 una = (unsigned long)skb->data & 2047; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1130 | if (una) |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1131 | skb_reserve(skb, 2048 - una); |
| 1132 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1133 | |
| 1134 | bail: |
| 1135 | return skb; |
| 1136 | } |
| 1137 | |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 1138 | static void ipath_rcv_hdrerr(struct ipath_devdata *dd, |
| 1139 | u32 eflags, |
| 1140 | u32 l, |
| 1141 | u32 etail, |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1142 | __le32 *rhf_addr, |
| 1143 | struct ipath_message_header *hdr) |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 1144 | { |
| 1145 | char emsg[128]; |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | get_rhf_errstring(eflags, emsg, sizeof emsg); |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 1148 | ipath_cdbg(PKT, "RHFerrs %x hdrqtail=%x typ=%u " |
| 1149 | "tlen=%x opcode=%x egridx=%x: %s\n", |
| 1150 | eflags, l, |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1151 | ipath_hdrget_rcv_type(rhf_addr), |
| 1152 | ipath_hdrget_length_in_bytes(rhf_addr), |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 1153 | be32_to_cpu(hdr->bth[0]) >> 24, |
| 1154 | etail, emsg); |
| 1155 | |
| 1156 | /* Count local link integrity errors. */ |
| 1157 | if (eflags & (INFINIPATH_RHF_H_ICRCERR | INFINIPATH_RHF_H_VCRCERR)) { |
| 1158 | u8 n = (dd->ipath_ibcctrl >> |
| 1159 | INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT) & |
| 1160 | INFINIPATH_IBCC_PHYERRTHRESHOLD_MASK; |
| 1161 | |
| 1162 | if (++dd->ipath_lli_counter > n) { |
| 1163 | dd->ipath_lli_counter = 0; |
| 1164 | dd->ipath_lli_errors++; |
| 1165 | } |
| 1166 | } |
| 1167 | } |
| 1168 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1169 | /* |
| 1170 | * ipath_kreceive - receive a packet |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 1171 | * @pd: the infinipath port |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1172 | * |
| 1173 | * called from interrupt handler for errors or receive interrupt |
| 1174 | */ |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 1175 | void ipath_kreceive(struct ipath_portdata *pd) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1176 | { |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 1177 | struct ipath_devdata *dd = pd->port_dd; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1178 | __le32 *rhf_addr; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1179 | void *ebuf; |
| 1180 | const u32 rsize = dd->ipath_rcvhdrentsize; /* words */ |
| 1181 | const u32 maxcnt = dd->ipath_rcvhdrcnt * rsize; /* words */ |
| 1182 | u32 etail = -1, l, hdrqtail; |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 1183 | struct ipath_message_header *hdr; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1184 | u32 eflags, i, etype, tlen, pkttot = 0, updegr = 0, reloop = 0; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1185 | static u64 totcalls; /* stats, may eventually remove */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1186 | int last; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1187 | |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 1188 | l = pd->port_head; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1189 | rhf_addr = (__le32 *) pd->port_rcvhdrq + l + dd->ipath_rhf_offset; |
| 1190 | if (dd->ipath_flags & IPATH_NODMA_RTAIL) { |
| 1191 | u32 seq = ipath_hdrget_seq(rhf_addr); |
| 1192 | |
| 1193 | if (seq != pd->port_seq_cnt) |
| 1194 | goto bail; |
| 1195 | hdrqtail = 0; |
| 1196 | } else { |
| 1197 | hdrqtail = ipath_get_rcvhdrtail(pd); |
| 1198 | if (l == hdrqtail) |
| 1199 | goto bail; |
| 1200 | smp_rmb(); |
| 1201 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1202 | |
Bryan O'Sullivan | 57abad2 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 1203 | reloop: |
Michael Albaugh | 2889d1e | 2008-05-07 10:59:23 -0700 | [diff] [blame] | 1204 | for (last = 0, i = 1; !last; i += !last) { |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1205 | hdr = dd->ipath_f_get_msgheader(dd, rhf_addr); |
| 1206 | eflags = ipath_hdrget_err_flags(rhf_addr); |
| 1207 | etype = ipath_hdrget_rcv_type(rhf_addr); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1208 | /* total length */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1209 | tlen = ipath_hdrget_length_in_bytes(rhf_addr); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1210 | ebuf = NULL; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1211 | if ((dd->ipath_flags & IPATH_NODMA_RTAIL) ? |
| 1212 | ipath_hdrget_use_egr_buf(rhf_addr) : |
| 1213 | (etype != RCVHQ_RCV_TYPE_EXPECTED)) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1214 | /* |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1215 | * It turns out that the chip uses an eager buffer |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1216 | * for all non-expected packets, whether it "needs" |
| 1217 | * one or not. So always get the index, but don't |
| 1218 | * set ebuf (so we try to copy data) unless the |
| 1219 | * length requires it. |
| 1220 | */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1221 | etail = ipath_hdrget_index(rhf_addr); |
| 1222 | updegr = 1; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1223 | if (tlen > sizeof(*hdr) || |
| 1224 | etype == RCVHQ_RCV_TYPE_NON_KD) |
Ralph Campbell | d65708f | 2007-12-21 16:47:04 -0800 | [diff] [blame] | 1225 | ebuf = ipath_get_egrbuf(dd, etail); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1226 | } |
| 1227 | |
| 1228 | /* |
| 1229 | * both tiderr and ipathhdrerr are set for all plain IB |
| 1230 | * packets; only ipathhdrerr should be set. |
| 1231 | */ |
| 1232 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1233 | if (etype != RCVHQ_RCV_TYPE_NON_KD && |
| 1234 | etype != RCVHQ_RCV_TYPE_ERROR && |
| 1235 | ipath_hdrget_ipath_ver(hdr->iph.ver_port_tid_offset) != |
| 1236 | IPS_PROTO_VERSION) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1237 | ipath_cdbg(PKT, "Bad InfiniPath protocol version " |
| 1238 | "%x\n", etype); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1239 | |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 1240 | if (unlikely(eflags)) |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1241 | ipath_rcv_hdrerr(dd, eflags, l, etail, rhf_addr, hdr); |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 1242 | else if (etype == RCVHQ_RCV_TYPE_NON_KD) { |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1243 | ipath_ib_rcv(dd->verbs_dev, (u32 *)hdr, ebuf, tlen); |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 1244 | if (dd->ipath_lli_counter) |
| 1245 | dd->ipath_lli_counter--; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1246 | } else if (etype == RCVHQ_RCV_TYPE_EAGER) { |
| 1247 | u8 opcode = be32_to_cpu(hdr->bth[0]) >> 24; |
| 1248 | u32 qp = be32_to_cpu(hdr->bth[1]) & 0xffffff; |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 1249 | ipath_cdbg(PKT, "typ %x, opcode %x (eager, " |
| 1250 | "qp=%x), len %x; ignored\n", |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1251 | etype, opcode, qp, tlen); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1252 | } |
| 1253 | else if (etype == RCVHQ_RCV_TYPE_EXPECTED) |
| 1254 | ipath_dbg("Bug: Expected TID, opcode %x; ignored\n", |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1255 | be32_to_cpu(hdr->bth[0]) >> 24); |
Ralph Campbell | 3d37b9e | 2006-07-17 18:18:36 -0700 | [diff] [blame] | 1256 | else { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1257 | /* |
Dave Olson | 9e2ef36b | 2008-01-06 21:02:34 -0800 | [diff] [blame] | 1258 | * error packet, type of error unknown. |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1259 | * Probably type 3, but we don't know, so don't |
| 1260 | * even try to print the opcode, etc. |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1261 | * Usually caused by a "bad packet", that has no |
| 1262 | * BTH, when the LRH says it should. |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1263 | */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1264 | ipath_cdbg(ERRPKT, "Error Pkt, but no eflags! egrbuf" |
| 1265 | " %x, len %x hdrq+%x rhf: %Lx\n", |
Alexander Beregalov | 70117b9 | 2008-08-04 11:12:18 -0700 | [diff] [blame] | 1266 | etail, tlen, l, (unsigned long long) |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1267 | le64_to_cpu(*(__le64 *) rhf_addr)); |
| 1268 | if (ipath_debug & __IPATH_ERRPKTDBG) { |
| 1269 | u32 j, *d, dw = rsize-2; |
| 1270 | if (rsize > (tlen>>2)) |
| 1271 | dw = tlen>>2; |
| 1272 | d = (u32 *)hdr; |
| 1273 | printk(KERN_DEBUG "EPkt rcvhdr(%x dw):\n", |
| 1274 | dw); |
| 1275 | for (j = 0; j < dw; j++) |
| 1276 | printk(KERN_DEBUG "%8x%s", d[j], |
| 1277 | (j%8) == 7 ? "\n" : " "); |
| 1278 | printk(KERN_DEBUG ".\n"); |
| 1279 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1280 | } |
| 1281 | l += rsize; |
| 1282 | if (l >= maxcnt) |
| 1283 | l = 0; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1284 | rhf_addr = (__le32 *) pd->port_rcvhdrq + |
| 1285 | l + dd->ipath_rhf_offset; |
| 1286 | if (dd->ipath_flags & IPATH_NODMA_RTAIL) { |
| 1287 | u32 seq = ipath_hdrget_seq(rhf_addr); |
| 1288 | |
| 1289 | if (++pd->port_seq_cnt > 13) |
| 1290 | pd->port_seq_cnt = 1; |
| 1291 | if (seq != pd->port_seq_cnt) |
| 1292 | last = 1; |
| 1293 | } else if (l == hdrqtail) |
| 1294 | last = 1; |
Bryan O'Sullivan | f5f9992 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 1295 | /* |
| 1296 | * update head regs on last packet, and every 16 packets. |
| 1297 | * Reduce bus traffic, while still trying to prevent |
| 1298 | * rcvhdrq overflows, for when the queue is nearly full |
| 1299 | */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1300 | if (last || !(i & 0xf)) { |
| 1301 | u64 lval = l; |
| 1302 | |
| 1303 | /* request IBA6120 and 7220 interrupt only on last */ |
| 1304 | if (last) |
| 1305 | lval |= dd->ipath_rhdrhead_intr_off; |
| 1306 | ipath_write_ureg(dd, ur_rcvhdrhead, lval, |
| 1307 | pd->port_port); |
Bryan O'Sullivan | f5f9992 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 1308 | if (updegr) { |
Ralph Campbell | 8c641d4 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1309 | ipath_write_ureg(dd, ur_rcvegrindexhead, |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1310 | etail, pd->port_port); |
Bryan O'Sullivan | f5f9992 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 1311 | updegr = 0; |
| 1312 | } |
| 1313 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1314 | } |
| 1315 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1316 | if (!dd->ipath_rhdrhead_intr_off && !reloop && |
| 1317 | !(dd->ipath_flags & IPATH_NODMA_RTAIL)) { |
Bryan O'Sullivan | 525d0ca | 2006-08-25 11:24:39 -0700 | [diff] [blame] | 1318 | /* IBA6110 workaround; we can have a race clearing chip |
Bryan O'Sullivan | 57abad2 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 1319 | * interrupt with another interrupt about to be delivered, |
| 1320 | * and can clear it before it is delivered on the GPIO |
| 1321 | * workaround. By doing the extra check here for the |
| 1322 | * in-memory tail register updating while we were doing |
| 1323 | * earlier packets, we "almost" guarantee we have covered |
| 1324 | * that case. |
| 1325 | */ |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 1326 | u32 hqtail = ipath_get_rcvhdrtail(pd); |
Bryan O'Sullivan | 57abad2 | 2006-07-01 04:36:05 -0700 | [diff] [blame] | 1327 | if (hqtail != hdrqtail) { |
| 1328 | hdrqtail = hqtail; |
| 1329 | reloop = 1; /* loop 1 extra time at most */ |
| 1330 | goto reloop; |
| 1331 | } |
| 1332 | } |
| 1333 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1334 | pkttot += i; |
| 1335 | |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 1336 | pd->port_head = l; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1337 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1338 | if (pkttot > ipath_stats.sps_maxpkts_call) |
| 1339 | ipath_stats.sps_maxpkts_call = pkttot; |
| 1340 | ipath_stats.sps_port0pkts += pkttot; |
| 1341 | ipath_stats.sps_avgpkts_call = |
| 1342 | ipath_stats.sps_port0pkts / ++totcalls; |
| 1343 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1344 | bail:; |
| 1345 | } |
| 1346 | |
| 1347 | /** |
| 1348 | * ipath_update_pio_bufs - update shadow copy of the PIO availability map |
| 1349 | * @dd: the infinipath device |
| 1350 | * |
| 1351 | * called whenever our local copy indicates we have run out of send buffers |
| 1352 | * NOTE: This can be called from interrupt context by some code |
| 1353 | * and from non-interrupt context by ipath_getpiobuf(). |
| 1354 | */ |
| 1355 | |
| 1356 | static void ipath_update_pio_bufs(struct ipath_devdata *dd) |
| 1357 | { |
| 1358 | unsigned long flags; |
| 1359 | int i; |
| 1360 | const unsigned piobregs = (unsigned)dd->ipath_pioavregs; |
| 1361 | |
| 1362 | /* If the generation (check) bits have changed, then we update the |
| 1363 | * busy bit for the corresponding PIO buffer. This algorithm will |
| 1364 | * modify positions to the value they already have in some cases |
| 1365 | * (i.e., no change), but it's faster than changing only the bits |
| 1366 | * that have changed. |
| 1367 | * |
| 1368 | * We would like to do this atomicly, to avoid spinlocks in the |
| 1369 | * critical send path, but that's not really possible, given the |
| 1370 | * type of changes, and that this routine could be called on |
| 1371 | * multiple cpu's simultaneously, so we lock in this routine only, |
| 1372 | * to avoid conflicting updates; all we change is the shadow, and |
| 1373 | * it's a single 64 bit memory location, so by definition the update |
| 1374 | * is atomic in terms of what other cpu's can see in testing the |
| 1375 | * bits. The spin_lock overhead isn't too bad, since it only |
| 1376 | * happens when all buffers are in use, so only cpu overhead, not |
| 1377 | * latency or bandwidth is affected. |
| 1378 | */ |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1379 | if (!dd->ipath_pioavailregs_dma) { |
| 1380 | ipath_dbg("Update shadow pioavail, but regs_dma NULL!\n"); |
| 1381 | return; |
| 1382 | } |
| 1383 | if (ipath_debug & __IPATH_VERBDBG) { |
| 1384 | /* only if packet debug and verbose */ |
| 1385 | volatile __le64 *dma = dd->ipath_pioavailregs_dma; |
| 1386 | unsigned long *shadow = dd->ipath_pioavailshadow; |
| 1387 | |
| 1388 | ipath_cdbg(PKT, "Refill avail, dma0=%llx shad0=%lx, " |
| 1389 | "d1=%llx s1=%lx, d2=%llx s2=%lx, d3=%llx " |
| 1390 | "s3=%lx\n", |
| 1391 | (unsigned long long) le64_to_cpu(dma[0]), |
| 1392 | shadow[0], |
| 1393 | (unsigned long long) le64_to_cpu(dma[1]), |
| 1394 | shadow[1], |
| 1395 | (unsigned long long) le64_to_cpu(dma[2]), |
| 1396 | shadow[2], |
| 1397 | (unsigned long long) le64_to_cpu(dma[3]), |
| 1398 | shadow[3]); |
| 1399 | if (piobregs > 4) |
| 1400 | ipath_cdbg( |
| 1401 | PKT, "2nd group, dma4=%llx shad4=%lx, " |
| 1402 | "d5=%llx s5=%lx, d6=%llx s6=%lx, " |
| 1403 | "d7=%llx s7=%lx\n", |
| 1404 | (unsigned long long) le64_to_cpu(dma[4]), |
| 1405 | shadow[4], |
| 1406 | (unsigned long long) le64_to_cpu(dma[5]), |
| 1407 | shadow[5], |
| 1408 | (unsigned long long) le64_to_cpu(dma[6]), |
| 1409 | shadow[6], |
| 1410 | (unsigned long long) le64_to_cpu(dma[7]), |
| 1411 | shadow[7]); |
| 1412 | } |
| 1413 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
| 1414 | for (i = 0; i < piobregs; i++) { |
| 1415 | u64 pchbusy, pchg, piov, pnew; |
| 1416 | /* |
| 1417 | * Chip Errata: bug 6641; even and odd qwords>3 are swapped |
| 1418 | */ |
Ralph Campbell | 4ea61b5 | 2008-01-06 21:12:38 -0800 | [diff] [blame] | 1419 | if (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS)) |
| 1420 | piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i ^ 1]); |
| 1421 | else |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1422 | piov = le64_to_cpu(dd->ipath_pioavailregs_dma[i]); |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1423 | pchg = dd->ipath_pioavailkernel[i] & |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1424 | ~(dd->ipath_pioavailshadow[i] ^ piov); |
| 1425 | pchbusy = pchg << INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT; |
| 1426 | if (pchg && (pchbusy & dd->ipath_pioavailshadow[i])) { |
| 1427 | pnew = dd->ipath_pioavailshadow[i] & ~pchbusy; |
| 1428 | pnew |= piov & pchbusy; |
| 1429 | dd->ipath_pioavailshadow[i] = pnew; |
| 1430 | } |
| 1431 | } |
| 1432 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
| 1433 | } |
| 1434 | |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1435 | /* |
| 1436 | * used to force update of pioavailshadow if we can't get a pio buffer. |
| 1437 | * Needed primarily due to exitting freeze mode after recovering |
| 1438 | * from errors. Done lazily, because it's safer (known to not |
| 1439 | * be writing pio buffers). |
| 1440 | */ |
| 1441 | static void ipath_reset_availshadow(struct ipath_devdata *dd) |
| 1442 | { |
| 1443 | int i, im; |
| 1444 | unsigned long flags; |
| 1445 | |
| 1446 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
| 1447 | for (i = 0; i < dd->ipath_pioavregs; i++) { |
| 1448 | u64 val, oldval; |
| 1449 | /* deal with 6110 chip bug on high register #s */ |
| 1450 | im = (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS)) ? |
| 1451 | i ^ 1 : i; |
| 1452 | val = le64_to_cpu(dd->ipath_pioavailregs_dma[im]); |
| 1453 | /* |
| 1454 | * busy out the buffers not in the kernel avail list, |
| 1455 | * without changing the generation bits. |
| 1456 | */ |
| 1457 | oldval = dd->ipath_pioavailshadow[i]; |
| 1458 | dd->ipath_pioavailshadow[i] = val | |
| 1459 | ((~dd->ipath_pioavailkernel[i] << |
| 1460 | INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT) & |
| 1461 | 0xaaaaaaaaaaaaaaaaULL); /* All BUSY bits in qword */ |
| 1462 | if (oldval != dd->ipath_pioavailshadow[i]) |
| 1463 | ipath_dbg("shadow[%d] was %Lx, now %lx\n", |
Alexander Beregalov | 70117b9 | 2008-08-04 11:12:18 -0700 | [diff] [blame] | 1464 | i, (unsigned long long) oldval, |
| 1465 | dd->ipath_pioavailshadow[i]); |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1466 | } |
| 1467 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
| 1468 | } |
| 1469 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1470 | /** |
| 1471 | * ipath_setrcvhdrsize - set the receive header size |
| 1472 | * @dd: the infinipath device |
| 1473 | * @rhdrsize: the receive header size |
| 1474 | * |
| 1475 | * called from user init code, and also layered driver init |
| 1476 | */ |
| 1477 | int ipath_setrcvhdrsize(struct ipath_devdata *dd, unsigned rhdrsize) |
| 1478 | { |
| 1479 | int ret = 0; |
| 1480 | |
| 1481 | if (dd->ipath_flags & IPATH_RCVHDRSZ_SET) { |
| 1482 | if (dd->ipath_rcvhdrsize != rhdrsize) { |
| 1483 | dev_info(&dd->pcidev->dev, |
| 1484 | "Error: can't set protocol header " |
| 1485 | "size %u, already %u\n", |
| 1486 | rhdrsize, dd->ipath_rcvhdrsize); |
| 1487 | ret = -EAGAIN; |
| 1488 | } else |
| 1489 | ipath_cdbg(VERBOSE, "Reuse same protocol header " |
| 1490 | "size %u\n", dd->ipath_rcvhdrsize); |
| 1491 | } else if (rhdrsize > (dd->ipath_rcvhdrentsize - |
| 1492 | (sizeof(u64) / sizeof(u32)))) { |
| 1493 | ipath_dbg("Error: can't set protocol header size %u " |
| 1494 | "(> max %u)\n", rhdrsize, |
| 1495 | dd->ipath_rcvhdrentsize - |
| 1496 | (u32) (sizeof(u64) / sizeof(u32))); |
| 1497 | ret = -EOVERFLOW; |
| 1498 | } else { |
| 1499 | dd->ipath_flags |= IPATH_RCVHDRSZ_SET; |
| 1500 | dd->ipath_rcvhdrsize = rhdrsize; |
| 1501 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize, |
| 1502 | dd->ipath_rcvhdrsize); |
| 1503 | ipath_cdbg(VERBOSE, "Set protocol header size to %u\n", |
| 1504 | dd->ipath_rcvhdrsize); |
| 1505 | } |
| 1506 | return ret; |
| 1507 | } |
| 1508 | |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1509 | /* |
| 1510 | * debugging code and stats updates if no pio buffers available. |
| 1511 | */ |
| 1512 | static noinline void no_pio_bufs(struct ipath_devdata *dd) |
| 1513 | { |
| 1514 | unsigned long *shadow = dd->ipath_pioavailshadow; |
| 1515 | __le64 *dma = (__le64 *)dd->ipath_pioavailregs_dma; |
| 1516 | |
| 1517 | dd->ipath_upd_pio_shadow = 1; |
| 1518 | |
| 1519 | /* |
| 1520 | * not atomic, but if we lose a stat count in a while, that's OK |
| 1521 | */ |
| 1522 | ipath_stats.sps_nopiobufs++; |
| 1523 | if (!(++dd->ipath_consec_nopiobuf % 100000)) { |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1524 | ipath_force_pio_avail_update(dd); /* at start */ |
| 1525 | ipath_dbg("%u tries no piobufavail ts%lx; dmacopy: " |
| 1526 | "%llx %llx %llx %llx\n" |
| 1527 | "ipath shadow: %lx %lx %lx %lx\n", |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1528 | dd->ipath_consec_nopiobuf, |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1529 | (unsigned long)get_cycles(), |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1530 | (unsigned long long) le64_to_cpu(dma[0]), |
| 1531 | (unsigned long long) le64_to_cpu(dma[1]), |
| 1532 | (unsigned long long) le64_to_cpu(dma[2]), |
| 1533 | (unsigned long long) le64_to_cpu(dma[3]), |
| 1534 | shadow[0], shadow[1], shadow[2], shadow[3]); |
| 1535 | /* |
| 1536 | * 4 buffers per byte, 4 registers above, cover rest |
| 1537 | * below |
| 1538 | */ |
| 1539 | if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) > |
| 1540 | (sizeof(shadow[0]) * 4 * 4)) |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1541 | ipath_dbg("2nd group: dmacopy: " |
| 1542 | "%llx %llx %llx %llx\n" |
| 1543 | "ipath shadow: %lx %lx %lx %lx\n", |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1544 | (unsigned long long)le64_to_cpu(dma[4]), |
| 1545 | (unsigned long long)le64_to_cpu(dma[5]), |
| 1546 | (unsigned long long)le64_to_cpu(dma[6]), |
| 1547 | (unsigned long long)le64_to_cpu(dma[7]), |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1548 | shadow[4], shadow[5], shadow[6], shadow[7]); |
| 1549 | |
| 1550 | /* at end, so update likely happened */ |
| 1551 | ipath_reset_availshadow(dd); |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1552 | } |
| 1553 | } |
| 1554 | |
| 1555 | /* |
| 1556 | * common code for normal driver pio buffer allocation, and reserved |
| 1557 | * allocation. |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1558 | * |
| 1559 | * do appropriate marking as busy, etc. |
| 1560 | * returns buffer number if one found (>=0), negative number is error. |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1561 | */ |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1562 | static u32 __iomem *ipath_getpiobuf_range(struct ipath_devdata *dd, |
| 1563 | u32 *pbufnum, u32 first, u32 last, u32 firsti) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1564 | { |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1565 | int i, j, updated = 0; |
| 1566 | unsigned piobcnt; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1567 | unsigned long flags; |
| 1568 | unsigned long *shadow = dd->ipath_pioavailshadow; |
| 1569 | u32 __iomem *buf; |
| 1570 | |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1571 | piobcnt = last - first; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1572 | if (dd->ipath_upd_pio_shadow) { |
| 1573 | /* |
| 1574 | * Minor optimization. If we had no buffers on last call, |
| 1575 | * start out by doing the update; continue and do scan even |
| 1576 | * if no buffers were updated, to be paranoid |
| 1577 | */ |
| 1578 | ipath_update_pio_bufs(dd); |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1579 | updated++; |
| 1580 | i = first; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1581 | } else |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1582 | i = firsti; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1583 | rescan: |
| 1584 | /* |
| 1585 | * while test_and_set_bit() is atomic, we do that and then the |
| 1586 | * change_bit(), and the pair is not. See if this is the cause |
| 1587 | * of the remaining armlaunch errors. |
| 1588 | */ |
| 1589 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1590 | for (j = 0; j < piobcnt; j++, i++) { |
| 1591 | if (i >= last) |
| 1592 | i = first; |
| 1593 | if (__test_and_set_bit((2 * i) + 1, shadow)) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1594 | continue; |
| 1595 | /* flip generation bit */ |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1596 | __change_bit(2 * i, shadow); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1597 | break; |
| 1598 | } |
| 1599 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
| 1600 | |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1601 | if (j == piobcnt) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1602 | if (!updated) { |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1603 | /* |
| 1604 | * first time through; shadow exhausted, but may be |
| 1605 | * buffers available, try an update and then rescan. |
| 1606 | */ |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1607 | ipath_update_pio_bufs(dd); |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1608 | updated++; |
| 1609 | i = first; |
| 1610 | goto rescan; |
| 1611 | } else if (updated == 1 && piobcnt <= |
| 1612 | ((dd->ipath_sendctrl |
| 1613 | >> INFINIPATH_S_UPDTHRESH_SHIFT) & |
| 1614 | INFINIPATH_S_UPDTHRESH_MASK)) { |
| 1615 | /* |
| 1616 | * for chips supporting and using the update |
| 1617 | * threshold we need to force an update of the |
| 1618 | * in-memory copy if the count is less than the |
| 1619 | * thershold, then check one more time. |
| 1620 | */ |
| 1621 | ipath_force_pio_avail_update(dd); |
| 1622 | ipath_update_pio_bufs(dd); |
| 1623 | updated++; |
| 1624 | i = first; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1625 | goto rescan; |
| 1626 | } |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1627 | |
| 1628 | no_pio_bufs(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1629 | buf = NULL; |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1630 | } else { |
| 1631 | if (i < dd->ipath_piobcnt2k) |
| 1632 | buf = (u32 __iomem *) (dd->ipath_pio2kbase + |
| 1633 | i * dd->ipath_palign); |
| 1634 | else |
| 1635 | buf = (u32 __iomem *) |
| 1636 | (dd->ipath_pio4kbase + |
| 1637 | (i - dd->ipath_piobcnt2k) * dd->ipath_4kalign); |
| 1638 | if (pbufnum) |
| 1639 | *pbufnum = i; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1640 | } |
| 1641 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1642 | return buf; |
| 1643 | } |
| 1644 | |
| 1645 | /** |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1646 | * ipath_getpiobuf - find an available pio buffer |
| 1647 | * @dd: the infinipath device |
| 1648 | * @plen: the size of the PIO buffer needed in 32-bit words |
| 1649 | * @pbufnum: the buffer number is placed here |
| 1650 | */ |
| 1651 | u32 __iomem *ipath_getpiobuf(struct ipath_devdata *dd, u32 plen, u32 *pbufnum) |
| 1652 | { |
| 1653 | u32 __iomem *buf; |
| 1654 | u32 pnum, nbufs; |
| 1655 | u32 first, lasti; |
| 1656 | |
| 1657 | if (plen + 1 >= IPATH_SMALLBUF_DWORDS) { |
| 1658 | first = dd->ipath_piobcnt2k; |
| 1659 | lasti = dd->ipath_lastpioindexl; |
| 1660 | } else { |
| 1661 | first = 0; |
| 1662 | lasti = dd->ipath_lastpioindex; |
| 1663 | } |
| 1664 | nbufs = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k; |
| 1665 | buf = ipath_getpiobuf_range(dd, &pnum, first, nbufs, lasti); |
| 1666 | |
| 1667 | if (buf) { |
| 1668 | /* |
| 1669 | * Set next starting place. It's just an optimization, |
| 1670 | * it doesn't matter who wins on this, so no locking |
| 1671 | */ |
| 1672 | if (plen + 1 >= IPATH_SMALLBUF_DWORDS) |
| 1673 | dd->ipath_lastpioindexl = pnum + 1; |
| 1674 | else |
| 1675 | dd->ipath_lastpioindex = pnum + 1; |
| 1676 | if (dd->ipath_upd_pio_shadow) |
| 1677 | dd->ipath_upd_pio_shadow = 0; |
| 1678 | if (dd->ipath_consec_nopiobuf) |
| 1679 | dd->ipath_consec_nopiobuf = 0; |
| 1680 | ipath_cdbg(VERBOSE, "Return piobuf%u %uk @ %p\n", |
| 1681 | pnum, (pnum < dd->ipath_piobcnt2k) ? 2 : 4, buf); |
| 1682 | if (pbufnum) |
| 1683 | *pbufnum = pnum; |
| 1684 | |
| 1685 | } |
| 1686 | return buf; |
| 1687 | } |
| 1688 | |
| 1689 | /** |
| 1690 | * ipath_chg_pioavailkernel - change which send buffers are available for kernel |
| 1691 | * @dd: the infinipath device |
| 1692 | * @start: the starting send buffer number |
| 1693 | * @len: the number of send buffers |
| 1694 | * @avail: true if the buffers are available for kernel use, false otherwise |
| 1695 | */ |
| 1696 | void ipath_chg_pioavailkernel(struct ipath_devdata *dd, unsigned start, |
| 1697 | unsigned len, int avail) |
| 1698 | { |
| 1699 | unsigned long flags; |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1700 | unsigned end, cnt = 0, next; |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1701 | |
| 1702 | /* There are two bits per send buffer (busy and generation) */ |
| 1703 | start *= 2; |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1704 | end = start + len * 2; |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1705 | |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1706 | spin_lock_irqsave(&ipath_pioavail_lock, flags); |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1707 | /* Set or clear the busy bit in the shadow. */ |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1708 | while (start < end) { |
| 1709 | if (avail) { |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1710 | unsigned long dma; |
| 1711 | int i, im; |
| 1712 | /* |
| 1713 | * the BUSY bit will never be set, because we disarm |
| 1714 | * the user buffers before we hand them back to the |
| 1715 | * kernel. We do have to make sure the generation |
| 1716 | * bit is set correctly in shadow, since it could |
| 1717 | * have changed many times while allocated to user. |
| 1718 | * We can't use the bitmap functions on the full |
| 1719 | * dma array because it is always little-endian, so |
| 1720 | * we have to flip to host-order first. |
| 1721 | * BITS_PER_LONG is slightly wrong, since it's |
| 1722 | * always 64 bits per register in chip... |
| 1723 | * We only work on 64 bit kernels, so that's OK. |
| 1724 | */ |
| 1725 | /* deal with 6110 chip bug on high register #s */ |
| 1726 | i = start / BITS_PER_LONG; |
| 1727 | im = (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS)) ? |
| 1728 | i ^ 1 : i; |
| 1729 | __clear_bit(INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT |
| 1730 | + start, dd->ipath_pioavailshadow); |
| 1731 | dma = (unsigned long) le64_to_cpu( |
| 1732 | dd->ipath_pioavailregs_dma[im]); |
| 1733 | if (test_bit((INFINIPATH_SENDPIOAVAIL_CHECK_SHIFT |
| 1734 | + start) % BITS_PER_LONG, &dma)) |
| 1735 | __set_bit(INFINIPATH_SENDPIOAVAIL_CHECK_SHIFT |
| 1736 | + start, dd->ipath_pioavailshadow); |
| 1737 | else |
| 1738 | __clear_bit(INFINIPATH_SENDPIOAVAIL_CHECK_SHIFT |
| 1739 | + start, dd->ipath_pioavailshadow); |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1740 | __set_bit(start, dd->ipath_pioavailkernel); |
| 1741 | } else { |
| 1742 | __set_bit(start + INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT, |
| 1743 | dd->ipath_pioavailshadow); |
| 1744 | __clear_bit(start, dd->ipath_pioavailkernel); |
| 1745 | } |
| 1746 | start += 2; |
| 1747 | } |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1748 | |
| 1749 | if (dd->ipath_pioupd_thresh) { |
| 1750 | end = 2 * (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k); |
| 1751 | next = find_first_bit(dd->ipath_pioavailkernel, end); |
| 1752 | while (next < end) { |
| 1753 | cnt++; |
| 1754 | next = find_next_bit(dd->ipath_pioavailkernel, end, |
| 1755 | next + 1); |
| 1756 | } |
| 1757 | } |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1758 | spin_unlock_irqrestore(&ipath_pioavail_lock, flags); |
Dave Olson | e2ab41c | 2008-05-07 11:00:15 -0700 | [diff] [blame] | 1759 | |
| 1760 | /* |
| 1761 | * When moving buffers from kernel to user, if number assigned to |
| 1762 | * the user is less than the pio update threshold, and threshold |
| 1763 | * is supported (cnt was computed > 0), drop the update threshold |
| 1764 | * so we update at least once per allocated number of buffers. |
| 1765 | * In any case, if the kernel buffers are less than the threshold, |
| 1766 | * drop the threshold. We don't bother increasing it, having once |
| 1767 | * decreased it, since it would typically just cycle back and forth. |
| 1768 | * If we don't decrease below buffers in use, we can wait a long |
| 1769 | * time for an update, until some other context uses PIO buffers. |
| 1770 | */ |
| 1771 | if (!avail && len < cnt) |
| 1772 | cnt = len; |
| 1773 | if (cnt < dd->ipath_pioupd_thresh) { |
| 1774 | dd->ipath_pioupd_thresh = cnt; |
| 1775 | ipath_dbg("Decreased pio update threshold to %u\n", |
| 1776 | dd->ipath_pioupd_thresh); |
| 1777 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
| 1778 | dd->ipath_sendctrl &= ~(INFINIPATH_S_UPDTHRESH_MASK |
| 1779 | << INFINIPATH_S_UPDTHRESH_SHIFT); |
| 1780 | dd->ipath_sendctrl |= dd->ipath_pioupd_thresh |
| 1781 | << INFINIPATH_S_UPDTHRESH_SHIFT; |
| 1782 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 1783 | dd->ipath_sendctrl); |
| 1784 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
| 1785 | } |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1786 | } |
| 1787 | |
| 1788 | /** |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1789 | * ipath_create_rcvhdrq - create a receive header queue |
| 1790 | * @dd: the infinipath device |
| 1791 | * @pd: the port data |
| 1792 | * |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1793 | * this must be contiguous memory (from an i/o perspective), and must be |
| 1794 | * DMA'able (which means for some systems, it will go through an IOMMU, |
| 1795 | * or be forced into a low address range). |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1796 | */ |
| 1797 | int ipath_create_rcvhdrq(struct ipath_devdata *dd, |
| 1798 | struct ipath_portdata *pd) |
| 1799 | { |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1800 | int ret = 0; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1801 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1802 | if (!pd->port_rcvhdrq) { |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1803 | dma_addr_t phys_hdrqtail; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1804 | gfp_t gfp_flags = GFP_USER | __GFP_COMP; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1805 | int amt = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * |
| 1806 | sizeof(u32), PAGE_SIZE); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1807 | |
| 1808 | pd->port_rcvhdrq = dma_alloc_coherent( |
| 1809 | &dd->pcidev->dev, amt, &pd->port_rcvhdrq_phys, |
| 1810 | gfp_flags); |
| 1811 | |
| 1812 | if (!pd->port_rcvhdrq) { |
| 1813 | ipath_dev_err(dd, "attempt to allocate %d bytes " |
| 1814 | "for port %u rcvhdrq failed\n", |
| 1815 | amt, pd->port_port); |
| 1816 | ret = -ENOMEM; |
| 1817 | goto bail; |
| 1818 | } |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1819 | |
| 1820 | if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) { |
| 1821 | pd->port_rcvhdrtail_kvaddr = dma_alloc_coherent( |
| 1822 | &dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail, |
| 1823 | GFP_KERNEL); |
| 1824 | if (!pd->port_rcvhdrtail_kvaddr) { |
| 1825 | ipath_dev_err(dd, "attempt to allocate 1 page " |
| 1826 | "for port %u rcvhdrqtailaddr " |
| 1827 | "failed\n", pd->port_port); |
| 1828 | ret = -ENOMEM; |
| 1829 | dma_free_coherent(&dd->pcidev->dev, amt, |
| 1830 | pd->port_rcvhdrq, |
| 1831 | pd->port_rcvhdrq_phys); |
| 1832 | pd->port_rcvhdrq = NULL; |
| 1833 | goto bail; |
| 1834 | } |
| 1835 | pd->port_rcvhdrqtailaddr_phys = phys_hdrqtail; |
| 1836 | ipath_cdbg(VERBOSE, "port %d hdrtailaddr, %llx " |
| 1837 | "physical\n", pd->port_port, |
| 1838 | (unsigned long long) phys_hdrqtail); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1839 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1840 | |
| 1841 | pd->port_rcvhdrq_size = amt; |
| 1842 | |
| 1843 | ipath_cdbg(VERBOSE, "%d pages at %p (phys %lx) size=%lu " |
| 1844 | "for port %u rcvhdr Q\n", |
| 1845 | amt >> PAGE_SHIFT, pd->port_rcvhdrq, |
| 1846 | (unsigned long) pd->port_rcvhdrq_phys, |
| 1847 | (unsigned long) pd->port_rcvhdrq_size, |
| 1848 | pd->port_port); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1849 | } |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1850 | else |
| 1851 | ipath_cdbg(VERBOSE, "reuse port %d rcvhdrq @%p %llx phys; " |
| 1852 | "hdrtailaddr@%p %llx physical\n", |
| 1853 | pd->port_port, pd->port_rcvhdrq, |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 1854 | (unsigned long long) pd->port_rcvhdrq_phys, |
| 1855 | pd->port_rcvhdrtail_kvaddr, (unsigned long long) |
| 1856 | pd->port_rcvhdrqtailaddr_phys); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1857 | |
| 1858 | /* clear for security and sanity on each use */ |
| 1859 | memset(pd->port_rcvhdrq, 0, pd->port_rcvhdrq_size); |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 1860 | if (pd->port_rcvhdrtail_kvaddr) |
| 1861 | memset(pd->port_rcvhdrtail_kvaddr, 0, PAGE_SIZE); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1862 | |
| 1863 | /* |
| 1864 | * 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] | 1865 | * memory (we zero the register at process close) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1866 | */ |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 1867 | ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdrtailaddr, |
| 1868 | pd->port_port, pd->port_rcvhdrqtailaddr_phys); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1869 | ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, |
| 1870 | pd->port_port, pd->port_rcvhdrq_phys); |
| 1871 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1872 | bail: |
| 1873 | return ret; |
| 1874 | } |
| 1875 | |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1876 | |
| 1877 | /* |
| 1878 | * Flush all sends that might be in the ready to send state, as well as any |
| 1879 | * that are in the process of being sent. Used whenever we need to be |
| 1880 | * sure the send side is idle. Cleans up all buffer state by canceling |
| 1881 | * all pio buffers, and issuing an abort, which cleans up anything in the |
| 1882 | * launch fifo. The cancel is superfluous on some chip versions, but |
| 1883 | * it's safer to always do it. |
| 1884 | * PIOAvail bits are updated by the chip as if normal send had happened. |
| 1885 | */ |
Dave Olson | 3810f2a | 2007-07-20 14:23:37 -0700 | [diff] [blame] | 1886 | void ipath_cancel_sends(struct ipath_devdata *dd, int restore_sendctrl) |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1887 | { |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1888 | unsigned long flags; |
| 1889 | |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 1890 | if (dd->ipath_flags & IPATH_IB_AUTONEG_INPROG) { |
| 1891 | ipath_cdbg(VERBOSE, "Ignore while in autonegotiation\n"); |
| 1892 | goto bail; |
| 1893 | } |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1894 | /* |
| 1895 | * If we have SDMA, and it's not disabled, we have to kick off the |
| 1896 | * abort state machine, provided we aren't already aborting. |
| 1897 | * If we are in the process of aborting SDMA (!DISABLED, but ABORTING), |
| 1898 | * we skip the rest of this routine. It is already "in progress" |
| 1899 | */ |
| 1900 | if (dd->ipath_flags & IPATH_HAS_SEND_DMA) { |
| 1901 | int skip_cancel; |
Roland Dreier | f018c7e | 2008-05-13 11:51:23 -0700 | [diff] [blame] | 1902 | unsigned long *statp = &dd->ipath_sdma_status; |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1903 | |
| 1904 | spin_lock_irqsave(&dd->ipath_sdma_lock, flags); |
| 1905 | skip_cancel = |
John Gregor | ab69b3c | 2008-05-07 11:01:10 -0700 | [diff] [blame] | 1906 | test_and_set_bit(IPATH_SDMA_ABORTING, statp) |
| 1907 | && !test_bit(IPATH_SDMA_DISABLED, statp); |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1908 | spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags); |
| 1909 | if (skip_cancel) |
| 1910 | goto bail; |
| 1911 | } |
| 1912 | |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1913 | ipath_dbg("Cancelling all in-progress send buffers\n"); |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 1914 | |
| 1915 | /* skip armlaunch errs for a while */ |
| 1916 | dd->ipath_lastcancel = jiffies + HZ / 2; |
| 1917 | |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1918 | /* |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1919 | * The abort bit is auto-clearing. We also don't want pioavail |
| 1920 | * update happening during this, and we don't want any other |
| 1921 | * sends going out, so turn those off for the duration. We read |
| 1922 | * the scratch register to be sure that cancels and the abort |
| 1923 | * have taken effect in the chip. Otherwise two parts are same |
| 1924 | * as ipath_force_pio_avail_update() |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1925 | */ |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1926 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
| 1927 | dd->ipath_sendctrl &= ~(INFINIPATH_S_PIOBUFAVAILUPD |
| 1928 | | INFINIPATH_S_PIOENABLE); |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1929 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1930 | dd->ipath_sendctrl | INFINIPATH_S_ABORT); |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1931 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1932 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1933 | |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1934 | /* disarm all send buffers */ |
| 1935 | ipath_disarm_piobufs(dd, 0, |
| 1936 | dd->ipath_piobcnt2k + dd->ipath_piobcnt4k); |
| 1937 | |
John Gregor | ab69b3c | 2008-05-07 11:01:10 -0700 | [diff] [blame] | 1938 | if (dd->ipath_flags & IPATH_HAS_SEND_DMA) |
| 1939 | set_bit(IPATH_SDMA_DISARMED, &dd->ipath_sdma_status); |
| 1940 | |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1941 | if (restore_sendctrl) { |
| 1942 | /* else done by caller later if needed */ |
| 1943 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
| 1944 | dd->ipath_sendctrl |= INFINIPATH_S_PIOBUFAVAILUPD | |
| 1945 | INFINIPATH_S_PIOENABLE; |
| 1946 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 1947 | dd->ipath_sendctrl); |
| 1948 | /* and again, be sure all have hit the chip */ |
| 1949 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 1950 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
| 1951 | } |
| 1952 | |
| 1953 | if ((dd->ipath_flags & IPATH_HAS_SEND_DMA) && |
| 1954 | !test_bit(IPATH_SDMA_DISABLED, &dd->ipath_sdma_status) && |
| 1955 | test_bit(IPATH_SDMA_RUNNING, &dd->ipath_sdma_status)) { |
| 1956 | spin_lock_irqsave(&dd->ipath_sdma_lock, flags); |
| 1957 | /* only wait so long for intr */ |
| 1958 | dd->ipath_sdma_abort_intr_timeout = jiffies + HZ; |
| 1959 | dd->ipath_sdma_reset_wait = 200; |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 1960 | if (!test_bit(IPATH_SDMA_SHUTDOWN, &dd->ipath_sdma_status)) |
| 1961 | tasklet_hi_schedule(&dd->ipath_sdma_abort_task); |
| 1962 | spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags); |
| 1963 | } |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 1964 | bail:; |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 1965 | } |
| 1966 | |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1967 | /* |
| 1968 | * Force an update of in-memory copy of the pioavail registers, when |
| 1969 | * needed for any of a variety of reasons. We read the scratch register |
| 1970 | * to make it highly likely that the update will have happened by the |
| 1971 | * time we return. If already off (as in cancel_sends above), this |
| 1972 | * routine is a nop, on the assumption that the caller will "do the |
| 1973 | * right thing". |
| 1974 | */ |
| 1975 | void ipath_force_pio_avail_update(struct ipath_devdata *dd) |
| 1976 | { |
| 1977 | unsigned long flags; |
| 1978 | |
| 1979 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
| 1980 | if (dd->ipath_sendctrl & INFINIPATH_S_PIOBUFAVAILUPD) { |
| 1981 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 1982 | dd->ipath_sendctrl & ~INFINIPATH_S_PIOBUFAVAILUPD); |
| 1983 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 1984 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, |
| 1985 | dd->ipath_sendctrl); |
| 1986 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 1987 | } |
| 1988 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
| 1989 | } |
| 1990 | |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1991 | static void ipath_set_ib_lstate(struct ipath_devdata *dd, int linkcmd, |
| 1992 | int linitcmd) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1993 | { |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 1994 | u64 mod_wd; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1995 | static const char *what[4] = { |
Ralph Campbell | 140277e | 2007-12-14 01:53:56 -0800 | [diff] [blame] | 1996 | [0] = "NOP", |
| 1997 | [INFINIPATH_IBCC_LINKCMD_DOWN] = "DOWN", |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 1998 | [INFINIPATH_IBCC_LINKCMD_ARMED] = "ARMED", |
| 1999 | [INFINIPATH_IBCC_LINKCMD_ACTIVE] = "ACTIVE" |
| 2000 | }; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2001 | |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2002 | if (linitcmd == INFINIPATH_IBCC_LINKINITCMD_DISABLE) { |
| 2003 | /* |
| 2004 | * If we are told to disable, note that so link-recovery |
| 2005 | * code does not attempt to bring us back up. |
| 2006 | */ |
| 2007 | preempt_disable(); |
| 2008 | dd->ipath_flags |= IPATH_IB_LINK_DISABLED; |
| 2009 | preempt_enable(); |
| 2010 | } else if (linitcmd) { |
| 2011 | /* |
| 2012 | * Any other linkinitcmd will lead to LINKDOWN and then |
| 2013 | * to INIT (if all is well), so clear flag to let |
| 2014 | * link-recovery code attempt to bring us back up. |
| 2015 | */ |
| 2016 | preempt_disable(); |
| 2017 | dd->ipath_flags &= ~IPATH_IB_LINK_DISABLED; |
| 2018 | preempt_enable(); |
| 2019 | } |
| 2020 | |
| 2021 | mod_wd = (linkcmd << dd->ibcc_lc_shift) | |
| 2022 | (linitcmd << INFINIPATH_IBCC_LINKINITCMD_SHIFT); |
| 2023 | ipath_cdbg(VERBOSE, |
| 2024 | "Moving unit %u to %s (initcmd=0x%x), current ltstate is %s\n", |
| 2025 | dd->ipath_unit, what[linkcmd], linitcmd, |
| 2026 | ipath_ibcstatus_str[ipath_ib_linktrstate(dd, |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2027 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus))]); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2028 | |
| 2029 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2030 | dd->ipath_ibcctrl | mod_wd); |
| 2031 | /* read from chip so write is flushed */ |
| 2032 | (void) ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2033 | } |
| 2034 | |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2035 | int ipath_set_linkstate(struct ipath_devdata *dd, u8 newstate) |
| 2036 | { |
| 2037 | u32 lstate; |
| 2038 | int ret; |
| 2039 | |
| 2040 | switch (newstate) { |
Ralph Campbell | 140277e | 2007-12-14 01:53:56 -0800 | [diff] [blame] | 2041 | case IPATH_IB_LINKDOWN_ONLY: |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2042 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_DOWN, 0); |
Ralph Campbell | 140277e | 2007-12-14 01:53:56 -0800 | [diff] [blame] | 2043 | /* don't wait */ |
| 2044 | ret = 0; |
| 2045 | goto bail; |
| 2046 | |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2047 | case IPATH_IB_LINKDOWN: |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2048 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_DOWN, |
| 2049 | INFINIPATH_IBCC_LINKINITCMD_POLL); |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2050 | /* don't wait */ |
| 2051 | ret = 0; |
| 2052 | goto bail; |
| 2053 | |
| 2054 | case IPATH_IB_LINKDOWN_SLEEP: |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2055 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_DOWN, |
| 2056 | INFINIPATH_IBCC_LINKINITCMD_SLEEP); |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2057 | /* don't wait */ |
| 2058 | ret = 0; |
| 2059 | goto bail; |
| 2060 | |
| 2061 | case IPATH_IB_LINKDOWN_DISABLE: |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2062 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_DOWN, |
| 2063 | INFINIPATH_IBCC_LINKINITCMD_DISABLE); |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2064 | /* don't wait */ |
| 2065 | ret = 0; |
| 2066 | goto bail; |
| 2067 | |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2068 | case IPATH_IB_LINKARM: |
| 2069 | if (dd->ipath_flags & IPATH_LINKARMED) { |
| 2070 | ret = 0; |
| 2071 | goto bail; |
| 2072 | } |
| 2073 | if (!(dd->ipath_flags & |
| 2074 | (IPATH_LINKINIT | IPATH_LINKACTIVE))) { |
| 2075 | ret = -EINVAL; |
| 2076 | goto bail; |
| 2077 | } |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2078 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ARMED, 0); |
| 2079 | |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2080 | /* |
| 2081 | * Since the port can transition to ACTIVE by receiving |
| 2082 | * a non VL 15 packet, wait for either state. |
| 2083 | */ |
| 2084 | lstate = IPATH_LINKARMED | IPATH_LINKACTIVE; |
| 2085 | break; |
| 2086 | |
| 2087 | case IPATH_IB_LINKACTIVE: |
| 2088 | if (dd->ipath_flags & IPATH_LINKACTIVE) { |
| 2089 | ret = 0; |
| 2090 | goto bail; |
| 2091 | } |
| 2092 | if (!(dd->ipath_flags & IPATH_LINKARMED)) { |
| 2093 | ret = -EINVAL; |
| 2094 | goto bail; |
| 2095 | } |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2096 | ipath_set_ib_lstate(dd, INFINIPATH_IBCC_LINKCMD_ACTIVE, 0); |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2097 | lstate = IPATH_LINKACTIVE; |
| 2098 | break; |
| 2099 | |
Bryan O'Sullivan | 946db67 | 2007-03-15 14:44:45 -0700 | [diff] [blame] | 2100 | case IPATH_IB_LINK_LOOPBACK: |
| 2101 | dev_info(&dd->pcidev->dev, "Enabling IB local loopback\n"); |
| 2102 | dd->ipath_ibcctrl |= INFINIPATH_IBCC_LOOPBACK; |
| 2103 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, |
| 2104 | dd->ipath_ibcctrl); |
Dave Olson | b3e8f54 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2105 | |
| 2106 | /* turn heartbeat off, as it causes loopback to fail */ |
| 2107 | dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, |
| 2108 | IPATH_IB_HRTBT_OFF); |
| 2109 | /* don't wait */ |
Bryan O'Sullivan | 946db67 | 2007-03-15 14:44:45 -0700 | [diff] [blame] | 2110 | ret = 0; |
Dave Olson | b3e8f54 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2111 | goto bail; |
Bryan O'Sullivan | 946db67 | 2007-03-15 14:44:45 -0700 | [diff] [blame] | 2112 | |
| 2113 | case IPATH_IB_LINK_EXTERNAL: |
Dave Olson | b3e8f54 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2114 | dev_info(&dd->pcidev->dev, |
| 2115 | "Disabling IB local loopback (normal)\n"); |
| 2116 | dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, |
| 2117 | IPATH_IB_HRTBT_ON); |
Bryan O'Sullivan | 946db67 | 2007-03-15 14:44:45 -0700 | [diff] [blame] | 2118 | dd->ipath_ibcctrl &= ~INFINIPATH_IBCC_LOOPBACK; |
| 2119 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, |
| 2120 | dd->ipath_ibcctrl); |
Dave Olson | b3e8f54 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2121 | /* don't wait */ |
Bryan O'Sullivan | 946db67 | 2007-03-15 14:44:45 -0700 | [diff] [blame] | 2122 | ret = 0; |
Dave Olson | b3e8f54 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2123 | goto bail; |
| 2124 | |
| 2125 | /* |
| 2126 | * Heartbeat can be explicitly enabled by the user via |
| 2127 | * "hrtbt_enable" "file", and if disabled, trying to enable here |
| 2128 | * will have no effect. Implicit changes (heartbeat off when |
| 2129 | * loopback on, and vice versa) are included to ease testing. |
| 2130 | */ |
| 2131 | case IPATH_IB_LINK_HRTBT: |
| 2132 | ret = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, |
| 2133 | IPATH_IB_HRTBT_ON); |
| 2134 | goto bail; |
| 2135 | |
| 2136 | case IPATH_IB_LINK_NO_HRTBT: |
| 2137 | ret = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, |
| 2138 | IPATH_IB_HRTBT_OFF); |
| 2139 | goto bail; |
Bryan O'Sullivan | 946db67 | 2007-03-15 14:44:45 -0700 | [diff] [blame] | 2140 | |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2141 | default: |
| 2142 | ipath_dbg("Invalid linkstate 0x%x requested\n", newstate); |
| 2143 | ret = -EINVAL; |
| 2144 | goto bail; |
| 2145 | } |
| 2146 | ret = ipath_wait_linkstate(dd, lstate, 2000); |
| 2147 | |
| 2148 | bail: |
| 2149 | return ret; |
| 2150 | } |
| 2151 | |
| 2152 | /** |
| 2153 | * ipath_set_mtu - set the MTU |
| 2154 | * @dd: the infinipath device |
| 2155 | * @arg: the new MTU |
| 2156 | * |
| 2157 | * we can handle "any" incoming size, the issue here is whether we |
| 2158 | * need to restrict our outgoing size. For now, we don't do any |
| 2159 | * sanity checking on this, and we don't deal with what happens to |
| 2160 | * programs that are already running when the size changes. |
| 2161 | * NOTE: changing the MTU will usually cause the IBC to go back to |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2162 | * link INIT state... |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2163 | */ |
| 2164 | int ipath_set_mtu(struct ipath_devdata *dd, u16 arg) |
| 2165 | { |
| 2166 | u32 piosize; |
| 2167 | int changed = 0; |
| 2168 | int ret; |
| 2169 | |
| 2170 | /* |
| 2171 | * mtu is IB data payload max. It's the largest power of 2 less |
| 2172 | * than piosize (or even larger, since it only really controls the |
| 2173 | * largest we can receive; we can send the max of the mtu and |
| 2174 | * piosize). We check that it's one of the valid IB sizes. |
| 2175 | */ |
| 2176 | if (arg != 256 && arg != 512 && arg != 1024 && arg != 2048 && |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 2177 | (arg != 4096 || !ipath_mtu4096)) { |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2178 | ipath_dbg("Trying to set invalid mtu %u, failing\n", arg); |
| 2179 | ret = -EINVAL; |
| 2180 | goto bail; |
| 2181 | } |
| 2182 | if (dd->ipath_ibmtu == arg) { |
| 2183 | ret = 0; /* same as current */ |
| 2184 | goto bail; |
| 2185 | } |
| 2186 | |
| 2187 | piosize = dd->ipath_ibmaxlen; |
| 2188 | dd->ipath_ibmtu = arg; |
| 2189 | |
| 2190 | if (arg >= (piosize - IPATH_PIO_MAXIBHDR)) { |
| 2191 | /* Only if it's not the initial value (or reset to it) */ |
| 2192 | if (piosize != dd->ipath_init_ibmaxlen) { |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 2193 | if (arg > piosize && arg <= dd->ipath_init_ibmaxlen) |
| 2194 | piosize = dd->ipath_init_ibmaxlen; |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2195 | dd->ipath_ibmaxlen = piosize; |
| 2196 | changed = 1; |
| 2197 | } |
| 2198 | } else if ((arg + IPATH_PIO_MAXIBHDR) != dd->ipath_ibmaxlen) { |
| 2199 | piosize = arg + IPATH_PIO_MAXIBHDR; |
| 2200 | ipath_cdbg(VERBOSE, "ibmaxlen was 0x%x, setting to 0x%x " |
| 2201 | "(mtu 0x%x)\n", dd->ipath_ibmaxlen, piosize, |
| 2202 | arg); |
| 2203 | dd->ipath_ibmaxlen = piosize; |
| 2204 | changed = 1; |
| 2205 | } |
| 2206 | |
| 2207 | if (changed) { |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 2208 | u64 ibc = dd->ipath_ibcctrl, ibdw; |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2209 | /* |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 2210 | * update our housekeeping variables, and set IBC max |
| 2211 | * size, same as init code; max IBC is max we allow in |
| 2212 | * buffer, less the qword pbc, plus 1 for ICRC, in dwords |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2213 | */ |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 2214 | dd->ipath_ibmaxlen = piosize - 2 * sizeof(u32); |
| 2215 | ibdw = (dd->ipath_ibmaxlen >> 2) + 1; |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2216 | ibc &= ~(INFINIPATH_IBCC_MAXPKTLEN_MASK << |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 2217 | dd->ibcc_mpl_shift); |
| 2218 | ibc |= ibdw << dd->ibcc_mpl_shift; |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2219 | dd->ipath_ibcctrl = ibc; |
| 2220 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, |
| 2221 | dd->ipath_ibcctrl); |
| 2222 | dd->ipath_f_tidtemplate(dd); |
| 2223 | } |
| 2224 | |
| 2225 | ret = 0; |
| 2226 | |
| 2227 | bail: |
| 2228 | return ret; |
| 2229 | } |
| 2230 | |
Dave Olson | 0ab6b2b | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2231 | int ipath_set_lid(struct ipath_devdata *dd, u32 lid, u8 lmc) |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2232 | { |
Dave Olson | 0ab6b2b | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2233 | dd->ipath_lid = lid; |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2234 | dd->ipath_lmc = lmc; |
| 2235 | |
Dave Olson | 0ab6b2b | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2236 | dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_LIDLMC, lid | |
| 2237 | (~((1U << lmc) - 1)) << 16); |
| 2238 | |
| 2239 | dev_info(&dd->pcidev->dev, "We got a lid: 0x%x\n", lid); |
| 2240 | |
Bryan O'Sullivan | 34b2aaf | 2006-08-25 11:24:32 -0700 | [diff] [blame] | 2241 | return 0; |
| 2242 | } |
| 2243 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2244 | |
| 2245 | /** |
| 2246 | * ipath_write_kreg_port - write a device's per-port 64-bit kernel register |
| 2247 | * @dd: the infinipath device |
| 2248 | * @regno: the register number to write |
| 2249 | * @port: the port containing the register |
| 2250 | * @value: the value to write |
| 2251 | * |
| 2252 | * Registers that vary with the chip implementation constants (port) |
| 2253 | * use this routine. |
| 2254 | */ |
| 2255 | void ipath_write_kreg_port(const struct ipath_devdata *dd, ipath_kreg regno, |
| 2256 | unsigned port, u64 value) |
| 2257 | { |
| 2258 | u16 where; |
| 2259 | |
| 2260 | if (port < dd->ipath_portcnt && |
| 2261 | (regno == dd->ipath_kregs->kr_rcvhdraddr || |
| 2262 | regno == dd->ipath_kregs->kr_rcvhdrtailaddr)) |
| 2263 | where = regno + port; |
| 2264 | else |
| 2265 | where = -1; |
| 2266 | |
| 2267 | ipath_write_kreg(dd, where, value); |
| 2268 | } |
| 2269 | |
Michael Albaugh | 82466f0 | 2007-05-16 15:45:09 -0700 | [diff] [blame] | 2270 | /* |
| 2271 | * Following deal with the "obviously simple" task of overriding the state |
| 2272 | * of the LEDS, which normally indicate link physical and logical status. |
| 2273 | * The complications arise in dealing with different hardware mappings |
| 2274 | * and the board-dependent routine being called from interrupts. |
| 2275 | * and then there's the requirement to _flash_ them. |
| 2276 | */ |
| 2277 | #define LED_OVER_FREQ_SHIFT 8 |
| 2278 | #define LED_OVER_FREQ_MASK (0xFF<<LED_OVER_FREQ_SHIFT) |
| 2279 | /* Below is "non-zero" to force override, but both actual LEDs are off */ |
| 2280 | #define LED_OVER_BOTH_OFF (8) |
| 2281 | |
Roland Dreier | da9aec7 | 2007-07-17 18:37:43 -0700 | [diff] [blame] | 2282 | static void ipath_run_led_override(unsigned long opaque) |
Michael Albaugh | 82466f0 | 2007-05-16 15:45:09 -0700 | [diff] [blame] | 2283 | { |
| 2284 | struct ipath_devdata *dd = (struct ipath_devdata *)opaque; |
| 2285 | int timeoff; |
| 2286 | int pidx; |
| 2287 | u64 lstate, ltstate, val; |
| 2288 | |
| 2289 | if (!(dd->ipath_flags & IPATH_INITTED)) |
| 2290 | return; |
| 2291 | |
| 2292 | pidx = dd->ipath_led_override_phase++ & 1; |
| 2293 | dd->ipath_led_override = dd->ipath_led_override_vals[pidx]; |
| 2294 | timeoff = dd->ipath_led_override_timeoff; |
| 2295 | |
| 2296 | /* |
| 2297 | * below potentially restores the LED values per current status, |
| 2298 | * should also possibly setup the traffic-blink register, |
| 2299 | * but leave that to per-chip functions. |
| 2300 | */ |
| 2301 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2302 | ltstate = ipath_ib_linktrstate(dd, val); |
| 2303 | lstate = ipath_ib_linkstate(dd, val); |
Michael Albaugh | 82466f0 | 2007-05-16 15:45:09 -0700 | [diff] [blame] | 2304 | |
| 2305 | dd->ipath_f_setextled(dd, lstate, ltstate); |
| 2306 | mod_timer(&dd->ipath_led_override_timer, jiffies + timeoff); |
| 2307 | } |
| 2308 | |
| 2309 | void ipath_set_led_override(struct ipath_devdata *dd, unsigned int val) |
| 2310 | { |
| 2311 | int timeoff, freq; |
| 2312 | |
| 2313 | if (!(dd->ipath_flags & IPATH_INITTED)) |
| 2314 | return; |
| 2315 | |
| 2316 | /* First check if we are blinking. If not, use 1HZ polling */ |
| 2317 | timeoff = HZ; |
| 2318 | freq = (val & LED_OVER_FREQ_MASK) >> LED_OVER_FREQ_SHIFT; |
| 2319 | |
| 2320 | if (freq) { |
| 2321 | /* For blink, set each phase from one nybble of val */ |
| 2322 | dd->ipath_led_override_vals[0] = val & 0xF; |
| 2323 | dd->ipath_led_override_vals[1] = (val >> 4) & 0xF; |
| 2324 | timeoff = (HZ << 4)/freq; |
| 2325 | } else { |
| 2326 | /* Non-blink set both phases the same. */ |
| 2327 | dd->ipath_led_override_vals[0] = val & 0xF; |
| 2328 | dd->ipath_led_override_vals[1] = val & 0xF; |
| 2329 | } |
| 2330 | dd->ipath_led_override_timeoff = timeoff; |
| 2331 | |
| 2332 | /* |
| 2333 | * If the timer has not already been started, do so. Use a "quick" |
| 2334 | * timeout so the function will be called soon, to look at our request. |
| 2335 | */ |
| 2336 | if (atomic_inc_return(&dd->ipath_led_override_timer_active) == 1) { |
| 2337 | /* Need to start timer */ |
| 2338 | init_timer(&dd->ipath_led_override_timer); |
| 2339 | dd->ipath_led_override_timer.function = |
| 2340 | ipath_run_led_override; |
| 2341 | dd->ipath_led_override_timer.data = (unsigned long) dd; |
| 2342 | dd->ipath_led_override_timer.expires = jiffies + 1; |
| 2343 | add_timer(&dd->ipath_led_override_timer); |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2344 | } else |
Michael Albaugh | 82466f0 | 2007-05-16 15:45:09 -0700 | [diff] [blame] | 2345 | atomic_dec(&dd->ipath_led_override_timer_active); |
Michael Albaugh | 82466f0 | 2007-05-16 15:45:09 -0700 | [diff] [blame] | 2346 | } |
| 2347 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2348 | /** |
| 2349 | * ipath_shutdown_device - shut down a device |
| 2350 | * @dd: the infinipath device |
| 2351 | * |
| 2352 | * This is called to make the device quiet when we are about to |
| 2353 | * unload the driver, and also when the device is administratively |
| 2354 | * disabled. It does not free any data structures. |
| 2355 | * Everything it does has to be setup again by ipath_init_chip(dd,1) |
| 2356 | */ |
| 2357 | void ipath_shutdown_device(struct ipath_devdata *dd) |
| 2358 | { |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 2359 | unsigned long flags; |
| 2360 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2361 | ipath_dbg("Shutting down the device\n"); |
| 2362 | |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2363 | ipath_hol_up(dd); /* make sure user processes aren't suspended */ |
| 2364 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2365 | dd->ipath_flags |= IPATH_LINKUNK; |
| 2366 | dd->ipath_flags &= ~(IPATH_INITTED | IPATH_LINKDOWN | |
| 2367 | IPATH_LINKINIT | IPATH_LINKARMED | |
| 2368 | IPATH_LINKACTIVE); |
| 2369 | *dd->ipath_statusp &= ~(IPATH_STATUS_IB_CONF | |
| 2370 | IPATH_STATUS_IB_READY); |
| 2371 | |
| 2372 | /* mask interrupts, but not errors */ |
| 2373 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); |
| 2374 | |
| 2375 | dd->ipath_rcvctrl = 0; |
| 2376 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, |
| 2377 | dd->ipath_rcvctrl); |
| 2378 | |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2379 | if (dd->ipath_flags & IPATH_HAS_SEND_DMA) |
| 2380 | teardown_sdma(dd); |
| 2381 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2382 | /* |
| 2383 | * gracefully stop all sends allowing any in progress to trickle out |
| 2384 | * first. |
| 2385 | */ |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 2386 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
| 2387 | dd->ipath_sendctrl = 0; |
| 2388 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2389 | /* flush it */ |
Roland Dreier | 44f8e3f | 2006-12-12 11:50:20 -0800 | [diff] [blame] | 2390 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 2391 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
| 2392 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2393 | /* |
| 2394 | * enough for anything that's going to trickle out to have actually |
| 2395 | * done so. |
| 2396 | */ |
| 2397 | udelay(5); |
| 2398 | |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2399 | dd->ipath_f_setextled(dd, 0, 0); /* make sure LEDs are off */ |
| 2400 | |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 2401 | ipath_set_ib_lstate(dd, 0, INFINIPATH_IBCC_LINKINITCMD_DISABLE); |
Dave Olson | 3810f2a | 2007-07-20 14:23:37 -0700 | [diff] [blame] | 2402 | ipath_cancel_sends(dd, 0); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2403 | |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2404 | /* |
| 2405 | * we are shutting down, so tell components that care. We don't do |
| 2406 | * this on just a link state change, much like ethernet, a cable |
| 2407 | * unplug, etc. doesn't change driver state |
| 2408 | */ |
Ralph Campbell | 49739b3 | 2007-09-19 16:47:31 -0700 | [diff] [blame] | 2409 | signal_ib_event(dd, IB_EVENT_PORT_ERR); |
| 2410 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2411 | /* disable IBC */ |
| 2412 | dd->ipath_control &= ~INFINIPATH_C_LINKENABLE; |
| 2413 | ipath_write_kreg(dd, dd->ipath_kregs->kr_control, |
Bryan O'Sullivan | a40f55f | 2006-07-01 04:36:00 -0700 | [diff] [blame] | 2414 | dd->ipath_control | INFINIPATH_C_FREEZEMODE); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2415 | |
| 2416 | /* |
| 2417 | * clear SerdesEnable and turn the leds off; do this here because |
| 2418 | * we are unloading, so don't count on interrupts to move along |
| 2419 | * Turn the LEDs off explictly for the same reason. |
| 2420 | */ |
| 2421 | dd->ipath_f_quiet_serdes(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2422 | |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2423 | /* stop all the timers that might still be running */ |
| 2424 | del_timer_sync(&dd->ipath_hol_timer); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2425 | if (dd->ipath_stats_timer_active) { |
| 2426 | del_timer_sync(&dd->ipath_stats_timer); |
| 2427 | dd->ipath_stats_timer_active = 0; |
| 2428 | } |
Dave Olson | 9b436eb | 2008-04-16 21:09:30 -0700 | [diff] [blame] | 2429 | if (dd->ipath_intrchk_timer.data) { |
| 2430 | del_timer_sync(&dd->ipath_intrchk_timer); |
| 2431 | dd->ipath_intrchk_timer.data = 0; |
| 2432 | } |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2433 | if (atomic_read(&dd->ipath_led_override_timer_active)) { |
| 2434 | del_timer_sync(&dd->ipath_led_override_timer); |
| 2435 | atomic_set(&dd->ipath_led_override_timer_active, 0); |
| 2436 | } |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2437 | |
| 2438 | /* |
| 2439 | * clear all interrupts and errors, so that the next time the driver |
| 2440 | * is loaded or device is enabled, we know that whatever is set |
| 2441 | * happened while we were unloaded |
| 2442 | */ |
| 2443 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, |
| 2444 | ~0ULL & ~INFINIPATH_HWE_MEMBISTFAILED); |
| 2445 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL); |
| 2446 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL); |
Michael Albaugh | aecd3b5 | 2007-05-17 07:26:28 -0700 | [diff] [blame] | 2447 | |
| 2448 | ipath_cdbg(VERBOSE, "Flush time and errors to EEPROM\n"); |
| 2449 | ipath_update_eeprom_log(dd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2450 | } |
| 2451 | |
| 2452 | /** |
| 2453 | * ipath_free_pddata - free a port's allocated data |
| 2454 | * @dd: the infinipath device |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2455 | * @pd: the portdata structure |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2456 | * |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2457 | * free up any allocated data for a port |
| 2458 | * This should not touch anything that would affect a simultaneous |
| 2459 | * re-allocation of port data, because it is called after ipath_mutex |
| 2460 | * is released (and can be called from reinit as well). |
| 2461 | * It should never change any chip state, or global driver state. |
| 2462 | * (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] | 2463 | */ |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2464 | 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] | 2465 | { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2466 | if (!pd) |
| 2467 | return; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2468 | |
| 2469 | if (pd->port_rcvhdrq) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2470 | ipath_cdbg(VERBOSE, "free closed port %d rcvhdrq @ %p " |
| 2471 | "(size=%lu)\n", pd->port_port, pd->port_rcvhdrq, |
| 2472 | (unsigned long) pd->port_rcvhdrq_size); |
| 2473 | dma_free_coherent(&dd->pcidev->dev, pd->port_rcvhdrq_size, |
| 2474 | pd->port_rcvhdrq, pd->port_rcvhdrq_phys); |
| 2475 | pd->port_rcvhdrq = NULL; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2476 | if (pd->port_rcvhdrtail_kvaddr) { |
| 2477 | dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE, |
Bryan O'Sullivan | 076fafc | 2006-09-28 09:00:12 -0700 | [diff] [blame] | 2478 | pd->port_rcvhdrtail_kvaddr, |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2479 | pd->port_rcvhdrqtailaddr_phys); |
| 2480 | pd->port_rcvhdrtail_kvaddr = NULL; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2481 | } |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2482 | } |
| 2483 | if (pd->port_port && pd->port_rcvegrbuf) { |
| 2484 | unsigned e; |
| 2485 | |
| 2486 | for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { |
| 2487 | void *base = pd->port_rcvegrbuf[e]; |
| 2488 | size_t size = pd->port_rcvegrbuf_size; |
| 2489 | |
| 2490 | ipath_cdbg(VERBOSE, "egrbuf free(%p, %lu), " |
| 2491 | "chunk %u/%u\n", base, |
| 2492 | (unsigned long) size, |
| 2493 | e, pd->port_rcvegrbuf_chunks); |
| 2494 | dma_free_coherent(&dd->pcidev->dev, size, |
| 2495 | base, pd->port_rcvegrbuf_phys[e]); |
| 2496 | } |
Bryan O'Sullivan | 9929b0f | 2006-09-28 08:59:59 -0700 | [diff] [blame] | 2497 | kfree(pd->port_rcvegrbuf); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2498 | pd->port_rcvegrbuf = NULL; |
Bryan O'Sullivan | 9929b0f | 2006-09-28 08:59:59 -0700 | [diff] [blame] | 2499 | kfree(pd->port_rcvegrbuf_phys); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2500 | pd->port_rcvegrbuf_phys = NULL; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2501 | pd->port_rcvegrbuf_chunks = 0; |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 2502 | } else if (pd->port_port == 0 && dd->ipath_port0_skbinfo) { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2503 | unsigned e; |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 2504 | struct ipath_skbinfo *skbinfo = dd->ipath_port0_skbinfo; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2505 | |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 2506 | dd->ipath_port0_skbinfo = NULL; |
| 2507 | ipath_cdbg(VERBOSE, "free closed port %d " |
| 2508 | "ipath_port0_skbinfo @ %p\n", pd->port_port, |
| 2509 | skbinfo); |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2510 | for (e = 0; e < dd->ipath_p0_rcvegrcnt; e++) |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2511 | if (skbinfo[e].skb) { |
| 2512 | pci_unmap_single(dd->pcidev, skbinfo[e].phys, |
| 2513 | dd->ipath_ibmaxlen, |
| 2514 | PCI_DMA_FROMDEVICE); |
| 2515 | dev_kfree_skb(skbinfo[e].skb); |
| 2516 | } |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 2517 | vfree(skbinfo); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2518 | } |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2519 | kfree(pd->port_tid_pg_list); |
Bryan O'Sullivan | 9929b0f | 2006-09-28 08:59:59 -0700 | [diff] [blame] | 2520 | vfree(pd->subport_uregbase); |
| 2521 | vfree(pd->subport_rcvegrbuf); |
| 2522 | vfree(pd->subport_rcvhdr_base); |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 2523 | kfree(pd); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2524 | } |
| 2525 | |
Roland Dreier | ac2ae4c | 2006-04-19 11:40:12 -0700 | [diff] [blame] | 2526 | static int __init infinipath_init(void) |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2527 | { |
| 2528 | int ret; |
| 2529 | |
Bryan O'Sullivan | 39c0d0b | 2007-03-15 14:44:52 -0700 | [diff] [blame] | 2530 | if (ipath_debug & __IPATH_DBG) |
| 2531 | printk(KERN_INFO DRIVER_LOAD_MSG "%s", ib_ipath_version); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2532 | |
| 2533 | /* |
| 2534 | * These must be called before the driver is registered with |
| 2535 | * the PCI subsystem. |
| 2536 | */ |
| 2537 | idr_init(&unit_table); |
| 2538 | if (!idr_pre_get(&unit_table, GFP_KERNEL)) { |
Arthur Jones | bb91714 | 2008-04-16 21:09:31 -0700 | [diff] [blame] | 2539 | printk(KERN_ERR IPATH_DRV_NAME ": idr_pre_get() failed\n"); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2540 | ret = -ENOMEM; |
| 2541 | goto bail; |
| 2542 | } |
| 2543 | |
| 2544 | ret = pci_register_driver(&ipath_driver); |
| 2545 | if (ret < 0) { |
| 2546 | printk(KERN_ERR IPATH_DRV_NAME |
| 2547 | ": Unable to register driver: error %d\n", -ret); |
| 2548 | goto bail_unit; |
| 2549 | } |
| 2550 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2551 | ret = ipath_init_ipathfs(); |
| 2552 | if (ret < 0) { |
| 2553 | printk(KERN_ERR IPATH_DRV_NAME ": Unable to create " |
| 2554 | "ipathfs: error %d\n", -ret); |
Greg Kroah-Hartman | 23b9c1a | 2007-12-04 22:53:16 -0800 | [diff] [blame] | 2555 | goto bail_pci; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2556 | } |
| 2557 | |
| 2558 | goto bail; |
| 2559 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2560 | bail_pci: |
| 2561 | pci_unregister_driver(&ipath_driver); |
| 2562 | |
| 2563 | bail_unit: |
| 2564 | idr_destroy(&unit_table); |
| 2565 | |
| 2566 | bail: |
| 2567 | return ret; |
| 2568 | } |
| 2569 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2570 | static void __exit infinipath_cleanup(void) |
| 2571 | { |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2572 | ipath_exit_ipathfs(); |
| 2573 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2574 | ipath_cdbg(VERBOSE, "Unregistering pci driver\n"); |
| 2575 | pci_unregister_driver(&ipath_driver); |
| 2576 | |
| 2577 | idr_destroy(&unit_table); |
| 2578 | } |
| 2579 | |
| 2580 | /** |
| 2581 | * ipath_reset_device - reset the chip if possible |
| 2582 | * @unit: the device to reset |
| 2583 | * |
| 2584 | * Whether or not reset is successful, we attempt to re-initialize the chip |
| 2585 | * (that is, much like a driver unload/reload). We clear the INITTED flag |
| 2586 | * so that the various entry points will fail until we reinitialize. For |
| 2587 | * now, we only allow this if no user ports are open that use chip resources |
| 2588 | */ |
| 2589 | int ipath_reset_device(int unit) |
| 2590 | { |
| 2591 | int ret, i; |
| 2592 | struct ipath_devdata *dd = ipath_lookup(unit); |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 2593 | unsigned long flags; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2594 | |
| 2595 | if (!dd) { |
| 2596 | ret = -ENODEV; |
| 2597 | goto bail; |
| 2598 | } |
| 2599 | |
Michael Albaugh | 82466f0 | 2007-05-16 15:45:09 -0700 | [diff] [blame] | 2600 | if (atomic_read(&dd->ipath_led_override_timer_active)) { |
| 2601 | /* Need to stop LED timer, _then_ shut off LEDs */ |
| 2602 | del_timer_sync(&dd->ipath_led_override_timer); |
| 2603 | atomic_set(&dd->ipath_led_override_timer_active, 0); |
| 2604 | } |
| 2605 | |
| 2606 | /* Shut off LEDs after we are sure timer is not running */ |
| 2607 | dd->ipath_led_override = LED_OVER_BOTH_OFF; |
| 2608 | dd->ipath_f_setextled(dd, 0, 0); |
| 2609 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2610 | dev_info(&dd->pcidev->dev, "Reset on unit %u requested\n", unit); |
| 2611 | |
| 2612 | if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) { |
| 2613 | dev_info(&dd->pcidev->dev, "Invalid unit number %u or " |
| 2614 | "not initialized or not present\n", unit); |
| 2615 | ret = -ENXIO; |
| 2616 | goto bail; |
| 2617 | } |
| 2618 | |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 2619 | spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2620 | if (dd->ipath_pd) |
Bryan O'Sullivan | 23e86a4 | 2006-04-24 14:22:59 -0700 | [diff] [blame] | 2621 | for (i = 1; i < dd->ipath_cfgports; i++) { |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 2622 | if (!dd->ipath_pd[i] || !dd->ipath_pd[i]->port_cnt) |
| 2623 | continue; |
| 2624 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); |
| 2625 | ipath_dbg("unit %u port %d is in use " |
| 2626 | "(PID %u cmd %s), can't reset\n", |
| 2627 | unit, i, |
| 2628 | pid_nr(dd->ipath_pd[i]->port_pid), |
| 2629 | dd->ipath_pd[i]->port_comm); |
| 2630 | ret = -EBUSY; |
| 2631 | goto bail; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2632 | } |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 2633 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2634 | |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2635 | if (dd->ipath_flags & IPATH_HAS_SEND_DMA) |
| 2636 | teardown_sdma(dd); |
| 2637 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2638 | dd->ipath_flags &= ~IPATH_INITTED; |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2639 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2640 | ret = dd->ipath_f_reset(dd); |
Dave Olson | 124b4dc | 2008-04-16 21:09:32 -0700 | [diff] [blame] | 2641 | if (ret == 1) { |
| 2642 | ipath_dbg("Reinitializing unit %u after reset attempt\n", |
| 2643 | unit); |
| 2644 | ret = ipath_init_chip(dd, 1); |
| 2645 | } else |
| 2646 | ret = -EAGAIN; |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2647 | if (ret) |
| 2648 | ipath_dev_err(dd, "Reinitialize unit %u after " |
| 2649 | "reset failed with %d\n", unit, ret); |
| 2650 | else |
| 2651 | dev_info(&dd->pcidev->dev, "Reinitialized unit %u after " |
| 2652 | "resetting\n", unit); |
| 2653 | |
| 2654 | bail: |
| 2655 | return ret; |
| 2656 | } |
| 2657 | |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2658 | /* |
| 2659 | * send a signal to all the processes that have the driver open |
| 2660 | * through the normal interfaces (i.e., everything other than diags |
| 2661 | * interface). Returns number of signalled processes. |
| 2662 | */ |
| 2663 | static int ipath_signal_procs(struct ipath_devdata *dd, int sig) |
| 2664 | { |
| 2665 | int i, sub, any = 0; |
Pavel Emelyanov | 40d9769 | 2008-05-13 11:45:32 -0700 | [diff] [blame] | 2666 | struct pid *pid; |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 2667 | unsigned long flags; |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2668 | |
| 2669 | if (!dd->ipath_pd) |
| 2670 | return 0; |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 2671 | |
| 2672 | spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2673 | for (i = 1; i < dd->ipath_cfgports; i++) { |
Pavel Emelyanov | 40d9769 | 2008-05-13 11:45:32 -0700 | [diff] [blame] | 2674 | if (!dd->ipath_pd[i] || !dd->ipath_pd[i]->port_cnt) |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2675 | continue; |
| 2676 | pid = dd->ipath_pd[i]->port_pid; |
Pavel Emelyanov | 40d9769 | 2008-05-13 11:45:32 -0700 | [diff] [blame] | 2677 | if (!pid) |
| 2678 | continue; |
| 2679 | |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2680 | dev_info(&dd->pcidev->dev, "context %d in use " |
| 2681 | "(PID %u), sending signal %d\n", |
Pavel Emelyanov | 40d9769 | 2008-05-13 11:45:32 -0700 | [diff] [blame] | 2682 | i, pid_nr(pid), sig); |
| 2683 | kill_pid(pid, sig, 1); |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2684 | any++; |
| 2685 | for (sub = 0; sub < INFINIPATH_MAX_SUBPORT; sub++) { |
| 2686 | pid = dd->ipath_pd[i]->port_subpid[sub]; |
| 2687 | if (!pid) |
| 2688 | continue; |
| 2689 | dev_info(&dd->pcidev->dev, "sub-context " |
| 2690 | "%d:%d in use (PID %u), sending " |
Pavel Emelyanov | 40d9769 | 2008-05-13 11:45:32 -0700 | [diff] [blame] | 2691 | "signal %d\n", i, sub, pid_nr(pid), sig); |
| 2692 | kill_pid(pid, sig, 1); |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2693 | any++; |
| 2694 | } |
| 2695 | } |
Dave Olson | 3d08909 | 2008-12-05 11:14:38 -0800 | [diff] [blame] | 2696 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2697 | return any; |
| 2698 | } |
| 2699 | |
| 2700 | static void ipath_hol_signal_down(struct ipath_devdata *dd) |
| 2701 | { |
| 2702 | if (ipath_signal_procs(dd, SIGSTOP)) |
| 2703 | ipath_dbg("Stopped some processes\n"); |
| 2704 | ipath_cancel_sends(dd, 1); |
| 2705 | } |
| 2706 | |
| 2707 | |
| 2708 | static void ipath_hol_signal_up(struct ipath_devdata *dd) |
| 2709 | { |
| 2710 | if (ipath_signal_procs(dd, SIGCONT)) |
| 2711 | ipath_dbg("Continued some processes\n"); |
| 2712 | } |
| 2713 | |
| 2714 | /* |
| 2715 | * link is down, stop any users processes, and flush pending sends |
| 2716 | * to prevent HoL blocking, then start the HoL timer that |
| 2717 | * periodically continues, then stop procs, so they can detect |
| 2718 | * link down if they want, and do something about it. |
Ingo Molnar | 7401922 | 2009-02-18 12:23:29 +0100 | [diff] [blame] | 2719 | * Timer may already be running, so use mod_timer, not add_timer. |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2720 | */ |
| 2721 | void ipath_hol_down(struct ipath_devdata *dd) |
| 2722 | { |
| 2723 | dd->ipath_hol_state = IPATH_HOL_DOWN; |
| 2724 | ipath_hol_signal_down(dd); |
| 2725 | dd->ipath_hol_next = IPATH_HOL_DOWNCONT; |
| 2726 | dd->ipath_hol_timer.expires = jiffies + |
| 2727 | msecs_to_jiffies(ipath_hol_timeout_ms); |
Ingo Molnar | 7401922 | 2009-02-18 12:23:29 +0100 | [diff] [blame] | 2728 | mod_timer(&dd->ipath_hol_timer, dd->ipath_hol_timer.expires); |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2729 | } |
| 2730 | |
| 2731 | /* |
| 2732 | * link is up, continue any user processes, and ensure timer |
| 2733 | * is a nop, if running. Let timer keep running, if set; it |
| 2734 | * will nop when it sees the link is up |
| 2735 | */ |
| 2736 | void ipath_hol_up(struct ipath_devdata *dd) |
| 2737 | { |
| 2738 | ipath_hol_signal_up(dd); |
| 2739 | dd->ipath_hol_state = IPATH_HOL_UP; |
| 2740 | } |
| 2741 | |
| 2742 | /* |
| 2743 | * toggle the running/not running state of user proceses |
| 2744 | * to prevent HoL blocking on chip resources, but still allow |
| 2745 | * user processes to do link down special case handling. |
| 2746 | * Should only be called via the timer |
| 2747 | */ |
| 2748 | void ipath_hol_event(unsigned long opaque) |
| 2749 | { |
| 2750 | struct ipath_devdata *dd = (struct ipath_devdata *)opaque; |
| 2751 | |
| 2752 | if (dd->ipath_hol_next == IPATH_HOL_DOWNSTOP |
| 2753 | && dd->ipath_hol_state != IPATH_HOL_UP) { |
| 2754 | dd->ipath_hol_next = IPATH_HOL_DOWNCONT; |
| 2755 | ipath_dbg("Stopping processes\n"); |
| 2756 | ipath_hol_signal_down(dd); |
| 2757 | } else { /* may do "extra" if also in ipath_hol_up() */ |
| 2758 | dd->ipath_hol_next = IPATH_HOL_DOWNSTOP; |
| 2759 | ipath_dbg("Continuing processes\n"); |
| 2760 | ipath_hol_signal_up(dd); |
| 2761 | } |
| 2762 | if (dd->ipath_hol_state == IPATH_HOL_UP) |
| 2763 | ipath_dbg("link's up, don't resched timer\n"); |
| 2764 | else { |
| 2765 | dd->ipath_hol_timer.expires = jiffies + |
| 2766 | msecs_to_jiffies(ipath_hol_timeout_ms); |
Ingo Molnar | 7401922 | 2009-02-18 12:23:29 +0100 | [diff] [blame] | 2767 | mod_timer(&dd->ipath_hol_timer, |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 2768 | dd->ipath_hol_timer.expires); |
| 2769 | } |
| 2770 | } |
| 2771 | |
Bryan O'Sullivan | 30fc5c3 | 2006-08-25 11:24:48 -0700 | [diff] [blame] | 2772 | int ipath_set_rx_pol_inv(struct ipath_devdata *dd, u8 new_pol_inv) |
| 2773 | { |
| 2774 | u64 val; |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2775 | |
| 2776 | if (new_pol_inv > INFINIPATH_XGXS_RX_POL_MASK) |
Bryan O'Sullivan | 30fc5c3 | 2006-08-25 11:24:48 -0700 | [diff] [blame] | 2777 | return -1; |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 2778 | if (dd->ipath_rx_pol_inv != new_pol_inv) { |
Bryan O'Sullivan | 30fc5c3 | 2006-08-25 11:24:48 -0700 | [diff] [blame] | 2779 | dd->ipath_rx_pol_inv = new_pol_inv; |
| 2780 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig); |
| 2781 | val &= ~(INFINIPATH_XGXS_RX_POL_MASK << |
Roland Dreier | 3cd9656 | 2006-09-22 15:22:46 -0700 | [diff] [blame] | 2782 | INFINIPATH_XGXS_RX_POL_SHIFT); |
| 2783 | val |= ((u64)dd->ipath_rx_pol_inv) << |
| 2784 | INFINIPATH_XGXS_RX_POL_SHIFT; |
Bryan O'Sullivan | 30fc5c3 | 2006-08-25 11:24:48 -0700 | [diff] [blame] | 2785 | ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val); |
| 2786 | } |
| 2787 | return 0; |
| 2788 | } |
Dave Olson | 6ac5072 | 2007-08-09 03:11:38 -0700 | [diff] [blame] | 2789 | |
| 2790 | /* |
| 2791 | * Disable and enable the armlaunch error. Used for PIO bandwidth testing on |
| 2792 | * the 7220, which is count-based, rather than trigger-based. Safe for the |
| 2793 | * driver check, since it's at init. Not completely safe when used for |
| 2794 | * user-mode checking, since some error checking can be lost, but not |
| 2795 | * particularly risky, and only has problematic side-effects in the face of |
| 2796 | * very buggy user code. There is no reference counting, but that's also |
| 2797 | * fine, given the intended use. |
| 2798 | */ |
| 2799 | void ipath_enable_armlaunch(struct ipath_devdata *dd) |
| 2800 | { |
| 2801 | dd->ipath_lasterror &= ~INFINIPATH_E_SPIOARMLAUNCH; |
| 2802 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, |
| 2803 | INFINIPATH_E_SPIOARMLAUNCH); |
| 2804 | dd->ipath_errormask |= INFINIPATH_E_SPIOARMLAUNCH; |
| 2805 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, |
| 2806 | dd->ipath_errormask); |
| 2807 | } |
| 2808 | |
| 2809 | void ipath_disable_armlaunch(struct ipath_devdata *dd) |
| 2810 | { |
| 2811 | /* so don't re-enable if already set */ |
| 2812 | dd->ipath_maskederrs &= ~INFINIPATH_E_SPIOARMLAUNCH; |
| 2813 | dd->ipath_errormask &= ~INFINIPATH_E_SPIOARMLAUNCH; |
| 2814 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, |
| 2815 | dd->ipath_errormask); |
| 2816 | } |
| 2817 | |
Bryan O'Sullivan | 7bb206e | 2006-03-29 15:23:24 -0800 | [diff] [blame] | 2818 | module_init(infinipath_init); |
| 2819 | module_exit(infinipath_cleanup); |