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Merge branch 'docs-next' of git://git.lwn.net/linux-2.6
[mirror_ubuntu-hirsute-kernel.git] / drivers / infiniband / hw / ipath / ipath_iba7220.c
1 /*
2 * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
3 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33 /*
34 * This file contains all of the code that is specific to the
35 * InfiniPath 7220 chip (except that specific to the SerDes)
36 */
37
38 #include <linux/interrupt.h>
39 #include <linux/pci.h>
40 #include <linux/sched.h>
41 #include <linux/delay.h>
42 #include <linux/io.h>
43 #include <rdma/ib_verbs.h>
44
45 #include "ipath_kernel.h"
46 #include "ipath_registers.h"
47 #include "ipath_7220.h"
48
49 static void ipath_setup_7220_setextled(struct ipath_devdata *, u64, u64);
50
51 static unsigned ipath_compat_ddr_negotiate = 1;
52
53 module_param_named(compat_ddr_negotiate, ipath_compat_ddr_negotiate, uint,
54 S_IWUSR | S_IRUGO);
55 MODULE_PARM_DESC(compat_ddr_negotiate,
56 "Attempt pre-IBTA 1.2 DDR speed negotiation");
57
58 static unsigned ipath_sdma_fetch_arb = 1;
59 module_param_named(fetch_arb, ipath_sdma_fetch_arb, uint, S_IRUGO);
60 MODULE_PARM_DESC(fetch_arb, "IBA7220: change SDMA descriptor arbitration");
61
62 /*
63 * This file contains almost all the chip-specific register information and
64 * access functions for the QLogic InfiniPath 7220 PCI-Express chip, with the
65 * exception of SerDes support, which in in ipath_sd7220.c.
66 *
67 * This lists the InfiniPath registers, in the actual chip layout.
68 * This structure should never be directly accessed.
69 */
70 struct _infinipath_do_not_use_kernel_regs {
71 unsigned long long Revision;
72 unsigned long long Control;
73 unsigned long long PageAlign;
74 unsigned long long PortCnt;
75 unsigned long long DebugPortSelect;
76 unsigned long long DebugSigsIntSel; /* was Reserved0;*/
77 unsigned long long SendRegBase;
78 unsigned long long UserRegBase;
79 unsigned long long CounterRegBase;
80 unsigned long long Scratch;
81 unsigned long long EEPROMAddrCmd; /* was Reserved1; */
82 unsigned long long EEPROMData; /* was Reserved2; */
83 unsigned long long IntBlocked;
84 unsigned long long IntMask;
85 unsigned long long IntStatus;
86 unsigned long long IntClear;
87 unsigned long long ErrorMask;
88 unsigned long long ErrorStatus;
89 unsigned long long ErrorClear;
90 unsigned long long HwErrMask;
91 unsigned long long HwErrStatus;
92 unsigned long long HwErrClear;
93 unsigned long long HwDiagCtrl;
94 unsigned long long MDIO;
95 unsigned long long IBCStatus;
96 unsigned long long IBCCtrl;
97 unsigned long long ExtStatus;
98 unsigned long long ExtCtrl;
99 unsigned long long GPIOOut;
100 unsigned long long GPIOMask;
101 unsigned long long GPIOStatus;
102 unsigned long long GPIOClear;
103 unsigned long long RcvCtrl;
104 unsigned long long RcvBTHQP;
105 unsigned long long RcvHdrSize;
106 unsigned long long RcvHdrCnt;
107 unsigned long long RcvHdrEntSize;
108 unsigned long long RcvTIDBase;
109 unsigned long long RcvTIDCnt;
110 unsigned long long RcvEgrBase;
111 unsigned long long RcvEgrCnt;
112 unsigned long long RcvBufBase;
113 unsigned long long RcvBufSize;
114 unsigned long long RxIntMemBase;
115 unsigned long long RxIntMemSize;
116 unsigned long long RcvPartitionKey;
117 unsigned long long RcvQPMulticastPort;
118 unsigned long long RcvPktLEDCnt;
119 unsigned long long IBCDDRCtrl;
120 unsigned long long HRTBT_GUID;
121 unsigned long long IB_SDTEST_IF_TX;
122 unsigned long long IB_SDTEST_IF_RX;
123 unsigned long long IBCDDRCtrl2;
124 unsigned long long IBCDDRStatus;
125 unsigned long long JIntReload;
126 unsigned long long IBNCModeCtrl;
127 unsigned long long SendCtrl;
128 unsigned long long SendBufBase;
129 unsigned long long SendBufSize;
130 unsigned long long SendBufCnt;
131 unsigned long long SendAvailAddr;
132 unsigned long long TxIntMemBase;
133 unsigned long long TxIntMemSize;
134 unsigned long long SendDmaBase;
135 unsigned long long SendDmaLenGen;
136 unsigned long long SendDmaTail;
137 unsigned long long SendDmaHead;
138 unsigned long long SendDmaHeadAddr;
139 unsigned long long SendDmaBufMask0;
140 unsigned long long SendDmaBufMask1;
141 unsigned long long SendDmaBufMask2;
142 unsigned long long SendDmaStatus;
143 unsigned long long SendBufferError;
144 unsigned long long SendBufferErrorCONT1;
145 unsigned long long SendBufErr2; /* was Reserved6SBE[0/6] */
146 unsigned long long Reserved6L[2];
147 unsigned long long AvailUpdCount;
148 unsigned long long RcvHdrAddr0;
149 unsigned long long RcvHdrAddrs[16]; /* Why enumerate? */
150 unsigned long long Reserved7hdtl; /* Align next to 300 */
151 unsigned long long RcvHdrTailAddr0; /* 300, like others */
152 unsigned long long RcvHdrTailAddrs[16];
153 unsigned long long Reserved9SW[7]; /* was [8]; we have 17 ports */
154 unsigned long long IbsdEpbAccCtl; /* IB Serdes EPB access control */
155 unsigned long long IbsdEpbTransReg; /* IB Serdes EPB Transaction */
156 unsigned long long Reserved10sds; /* was SerdesStatus on */
157 unsigned long long XGXSConfig;
158 unsigned long long IBSerDesCtrl; /* Was IBPLLCfg on Monty */
159 unsigned long long EEPCtlStat; /* for "boot" EEPROM/FLASH */
160 unsigned long long EEPAddrCmd;
161 unsigned long long EEPData;
162 unsigned long long PcieEpbAccCtl;
163 unsigned long long PcieEpbTransCtl;
164 unsigned long long EfuseCtl; /* E-Fuse control */
165 unsigned long long EfuseData[4];
166 unsigned long long ProcMon;
167 /* this chip moves following two from previous 200, 208 */
168 unsigned long long PCIeRBufTestReg0;
169 unsigned long long PCIeRBufTestReg1;
170 /* added for this chip */
171 unsigned long long PCIeRBufTestReg2;
172 unsigned long long PCIeRBufTestReg3;
173 /* added for this chip, debug only */
174 unsigned long long SPC_JTAG_ACCESS_REG;
175 unsigned long long LAControlReg;
176 unsigned long long GPIODebugSelReg;
177 unsigned long long DebugPortValueReg;
178 /* added for this chip, DMA */
179 unsigned long long SendDmaBufUsed[3];
180 unsigned long long SendDmaReqTagUsed;
181 /*
182 * added for this chip, EFUSE: note that these program 64-bit
183 * words 2 and 3 */
184 unsigned long long efuse_pgm_data[2];
185 unsigned long long Reserved11LAalign[10]; /* Skip 4B0..4F8 */
186 /* we have 30 regs for DDS and RXEQ in IB SERDES */
187 unsigned long long SerDesDDSRXEQ[30];
188 unsigned long long Reserved12LAalign[2]; /* Skip 5F0, 5F8 */
189 /* added for LA debug support */
190 unsigned long long LAMemory[32];
191 };
192
193 struct _infinipath_do_not_use_counters {
194 __u64 LBIntCnt;
195 __u64 LBFlowStallCnt;
196 __u64 TxSDmaDescCnt; /* was Reserved1 */
197 __u64 TxUnsupVLErrCnt;
198 __u64 TxDataPktCnt;
199 __u64 TxFlowPktCnt;
200 __u64 TxDwordCnt;
201 __u64 TxLenErrCnt;
202 __u64 TxMaxMinLenErrCnt;
203 __u64 TxUnderrunCnt;
204 __u64 TxFlowStallCnt;
205 __u64 TxDroppedPktCnt;
206 __u64 RxDroppedPktCnt;
207 __u64 RxDataPktCnt;
208 __u64 RxFlowPktCnt;
209 __u64 RxDwordCnt;
210 __u64 RxLenErrCnt;
211 __u64 RxMaxMinLenErrCnt;
212 __u64 RxICRCErrCnt;
213 __u64 RxVCRCErrCnt;
214 __u64 RxFlowCtrlErrCnt;
215 __u64 RxBadFormatCnt;
216 __u64 RxLinkProblemCnt;
217 __u64 RxEBPCnt;
218 __u64 RxLPCRCErrCnt;
219 __u64 RxBufOvflCnt;
220 __u64 RxTIDFullErrCnt;
221 __u64 RxTIDValidErrCnt;
222 __u64 RxPKeyMismatchCnt;
223 __u64 RxP0HdrEgrOvflCnt;
224 __u64 RxP1HdrEgrOvflCnt;
225 __u64 RxP2HdrEgrOvflCnt;
226 __u64 RxP3HdrEgrOvflCnt;
227 __u64 RxP4HdrEgrOvflCnt;
228 __u64 RxP5HdrEgrOvflCnt;
229 __u64 RxP6HdrEgrOvflCnt;
230 __u64 RxP7HdrEgrOvflCnt;
231 __u64 RxP8HdrEgrOvflCnt;
232 __u64 RxP9HdrEgrOvflCnt; /* was Reserved6 */
233 __u64 RxP10HdrEgrOvflCnt; /* was Reserved7 */
234 __u64 RxP11HdrEgrOvflCnt; /* new for IBA7220 */
235 __u64 RxP12HdrEgrOvflCnt; /* new for IBA7220 */
236 __u64 RxP13HdrEgrOvflCnt; /* new for IBA7220 */
237 __u64 RxP14HdrEgrOvflCnt; /* new for IBA7220 */
238 __u64 RxP15HdrEgrOvflCnt; /* new for IBA7220 */
239 __u64 RxP16HdrEgrOvflCnt; /* new for IBA7220 */
240 __u64 IBStatusChangeCnt;
241 __u64 IBLinkErrRecoveryCnt;
242 __u64 IBLinkDownedCnt;
243 __u64 IBSymbolErrCnt;
244 /* The following are new for IBA7220 */
245 __u64 RxVL15DroppedPktCnt;
246 __u64 RxOtherLocalPhyErrCnt;
247 __u64 PcieRetryBufDiagQwordCnt;
248 __u64 ExcessBufferOvflCnt;
249 __u64 LocalLinkIntegrityErrCnt;
250 __u64 RxVlErrCnt;
251 __u64 RxDlidFltrCnt;
252 __u64 Reserved8[7];
253 __u64 PSStat;
254 __u64 PSStart;
255 __u64 PSInterval;
256 __u64 PSRcvDataCount;
257 __u64 PSRcvPktsCount;
258 __u64 PSXmitDataCount;
259 __u64 PSXmitPktsCount;
260 __u64 PSXmitWaitCount;
261 };
262
263 #define IPATH_KREG_OFFSET(field) (offsetof( \
264 struct _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
265 #define IPATH_CREG_OFFSET(field) (offsetof( \
266 struct _infinipath_do_not_use_counters, field) / sizeof(u64))
267
268 static const struct ipath_kregs ipath_7220_kregs = {
269 .kr_control = IPATH_KREG_OFFSET(Control),
270 .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
271 .kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
272 .kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
273 .kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
274 .kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
275 .kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
276 .kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
277 .kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
278 .kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
279 .kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
280 .kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
281 .kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
282 .kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
283 .kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
284 .kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
285 .kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
286 .kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
287 .kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
288 .kr_intclear = IPATH_KREG_OFFSET(IntClear),
289 .kr_intmask = IPATH_KREG_OFFSET(IntMask),
290 .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
291 .kr_mdio = IPATH_KREG_OFFSET(MDIO),
292 .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
293 .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
294 .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
295 .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
296 .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
297 .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
298 .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
299 .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
300 .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
301 .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
302 .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
303 .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
304 .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
305 .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
306 .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
307 .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
308 .kr_revision = IPATH_KREG_OFFSET(Revision),
309 .kr_scratch = IPATH_KREG_OFFSET(Scratch),
310 .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
311 .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
312 .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendAvailAddr),
313 .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendBufBase),
314 .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendBufCnt),
315 .kr_sendpiosize = IPATH_KREG_OFFSET(SendBufSize),
316 .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
317 .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
318 .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
319 .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
320
321 .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
322
323 /* send dma related regs */
324 .kr_senddmabase = IPATH_KREG_OFFSET(SendDmaBase),
325 .kr_senddmalengen = IPATH_KREG_OFFSET(SendDmaLenGen),
326 .kr_senddmatail = IPATH_KREG_OFFSET(SendDmaTail),
327 .kr_senddmahead = IPATH_KREG_OFFSET(SendDmaHead),
328 .kr_senddmaheadaddr = IPATH_KREG_OFFSET(SendDmaHeadAddr),
329 .kr_senddmabufmask0 = IPATH_KREG_OFFSET(SendDmaBufMask0),
330 .kr_senddmabufmask1 = IPATH_KREG_OFFSET(SendDmaBufMask1),
331 .kr_senddmabufmask2 = IPATH_KREG_OFFSET(SendDmaBufMask2),
332 .kr_senddmastatus = IPATH_KREG_OFFSET(SendDmaStatus),
333
334 /* SerDes related regs */
335 .kr_ibserdesctrl = IPATH_KREG_OFFSET(IBSerDesCtrl),
336 .kr_ib_epbacc = IPATH_KREG_OFFSET(IbsdEpbAccCtl),
337 .kr_ib_epbtrans = IPATH_KREG_OFFSET(IbsdEpbTransReg),
338 .kr_pcie_epbacc = IPATH_KREG_OFFSET(PcieEpbAccCtl),
339 .kr_pcie_epbtrans = IPATH_KREG_OFFSET(PcieEpbTransCtl),
340 .kr_ib_ddsrxeq = IPATH_KREG_OFFSET(SerDesDDSRXEQ),
341
342 /*
343 * These should not be used directly via ipath_read_kreg64(),
344 * use them with ipath_read_kreg64_port()
345 */
346 .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
347 .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0),
348
349 /*
350 * The rcvpktled register controls one of the debug port signals, so
351 * a packet activity LED can be connected to it.
352 */
353 .kr_rcvpktledcnt = IPATH_KREG_OFFSET(RcvPktLEDCnt),
354 .kr_pcierbuftestreg0 = IPATH_KREG_OFFSET(PCIeRBufTestReg0),
355 .kr_pcierbuftestreg1 = IPATH_KREG_OFFSET(PCIeRBufTestReg1),
356
357 .kr_hrtbt_guid = IPATH_KREG_OFFSET(HRTBT_GUID),
358 .kr_ibcddrctrl = IPATH_KREG_OFFSET(IBCDDRCtrl),
359 .kr_ibcddrstatus = IPATH_KREG_OFFSET(IBCDDRStatus),
360 .kr_jintreload = IPATH_KREG_OFFSET(JIntReload)
361 };
362
363 static const struct ipath_cregs ipath_7220_cregs = {
364 .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
365 .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
366 .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
367 .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
368 .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
369 .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
370 .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
371 .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
372 .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
373 .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
374 .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
375 .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
376 .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
377 .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
378 .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
379 .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
380 .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
381 .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
382 .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
383 .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
384 .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
385 .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
386 .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
387 .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
388 .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
389 .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
390 .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
391 .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
392 .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
393 .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
394 .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
395 .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
396 .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt),
397 .cr_vl15droppedpktcnt = IPATH_CREG_OFFSET(RxVL15DroppedPktCnt),
398 .cr_rxotherlocalphyerrcnt =
399 IPATH_CREG_OFFSET(RxOtherLocalPhyErrCnt),
400 .cr_excessbufferovflcnt = IPATH_CREG_OFFSET(ExcessBufferOvflCnt),
401 .cr_locallinkintegrityerrcnt =
402 IPATH_CREG_OFFSET(LocalLinkIntegrityErrCnt),
403 .cr_rxvlerrcnt = IPATH_CREG_OFFSET(RxVlErrCnt),
404 .cr_rxdlidfltrcnt = IPATH_CREG_OFFSET(RxDlidFltrCnt),
405 .cr_psstat = IPATH_CREG_OFFSET(PSStat),
406 .cr_psstart = IPATH_CREG_OFFSET(PSStart),
407 .cr_psinterval = IPATH_CREG_OFFSET(PSInterval),
408 .cr_psrcvdatacount = IPATH_CREG_OFFSET(PSRcvDataCount),
409 .cr_psrcvpktscount = IPATH_CREG_OFFSET(PSRcvPktsCount),
410 .cr_psxmitdatacount = IPATH_CREG_OFFSET(PSXmitDataCount),
411 .cr_psxmitpktscount = IPATH_CREG_OFFSET(PSXmitPktsCount),
412 .cr_psxmitwaitcount = IPATH_CREG_OFFSET(PSXmitWaitCount),
413 };
414
415 /* kr_control bits */
416 #define INFINIPATH_C_RESET (1U<<7)
417
418 /* kr_intstatus, kr_intclear, kr_intmask bits */
419 #define INFINIPATH_I_RCVURG_MASK ((1ULL<<17)-1)
420 #define INFINIPATH_I_RCVURG_SHIFT 32
421 #define INFINIPATH_I_RCVAVAIL_MASK ((1ULL<<17)-1)
422 #define INFINIPATH_I_RCVAVAIL_SHIFT 0
423 #define INFINIPATH_I_SERDESTRIMDONE (1ULL<<27)
424
425 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
426 #define INFINIPATH_HWE_PCIEMEMPARITYERR_MASK 0x00000000000000ffULL
427 #define INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT 0
428 #define INFINIPATH_HWE_PCIEPOISONEDTLP 0x0000000010000000ULL
429 #define INFINIPATH_HWE_PCIECPLTIMEOUT 0x0000000020000000ULL
430 #define INFINIPATH_HWE_PCIEBUSPARITYXTLH 0x0000000040000000ULL
431 #define INFINIPATH_HWE_PCIEBUSPARITYXADM 0x0000000080000000ULL
432 #define INFINIPATH_HWE_PCIEBUSPARITYRADM 0x0000000100000000ULL
433 #define INFINIPATH_HWE_COREPLL_FBSLIP 0x0080000000000000ULL
434 #define INFINIPATH_HWE_COREPLL_RFSLIP 0x0100000000000000ULL
435 #define INFINIPATH_HWE_PCIE1PLLFAILED 0x0400000000000000ULL
436 #define INFINIPATH_HWE_PCIE0PLLFAILED 0x0800000000000000ULL
437 #define INFINIPATH_HWE_SERDESPLLFAILED 0x1000000000000000ULL
438 /* specific to this chip */
439 #define INFINIPATH_HWE_PCIECPLDATAQUEUEERR 0x0000000000000040ULL
440 #define INFINIPATH_HWE_PCIECPLHDRQUEUEERR 0x0000000000000080ULL
441 #define INFINIPATH_HWE_SDMAMEMREADERR 0x0000000010000000ULL
442 #define INFINIPATH_HWE_CLK_UC_PLLNOTLOCKED 0x2000000000000000ULL
443 #define INFINIPATH_HWE_PCIESERDESQ0PCLKNOTDETECT 0x0100000000000000ULL
444 #define INFINIPATH_HWE_PCIESERDESQ1PCLKNOTDETECT 0x0200000000000000ULL
445 #define INFINIPATH_HWE_PCIESERDESQ2PCLKNOTDETECT 0x0400000000000000ULL
446 #define INFINIPATH_HWE_PCIESERDESQ3PCLKNOTDETECT 0x0800000000000000ULL
447 #define INFINIPATH_HWE_DDSRXEQMEMORYPARITYERR 0x0000008000000000ULL
448 #define INFINIPATH_HWE_IB_UC_MEMORYPARITYERR 0x0000004000000000ULL
449 #define INFINIPATH_HWE_PCIE_UC_OCT0MEMORYPARITYERR 0x0000001000000000ULL
450 #define INFINIPATH_HWE_PCIE_UC_OCT1MEMORYPARITYERR 0x0000002000000000ULL
451
452 #define IBA7220_IBCS_LINKTRAININGSTATE_MASK 0x1F
453 #define IBA7220_IBCS_LINKSTATE_SHIFT 5
454 #define IBA7220_IBCS_LINKSPEED_SHIFT 8
455 #define IBA7220_IBCS_LINKWIDTH_SHIFT 9
456
457 #define IBA7220_IBCC_LINKINITCMD_MASK 0x7ULL
458 #define IBA7220_IBCC_LINKCMD_SHIFT 19
459 #define IBA7220_IBCC_MAXPKTLEN_SHIFT 21
460
461 /* kr_ibcddrctrl bits */
462 #define IBA7220_IBC_DLIDLMC_MASK 0xFFFFFFFFUL
463 #define IBA7220_IBC_DLIDLMC_SHIFT 32
464 #define IBA7220_IBC_HRTBT_MASK 3
465 #define IBA7220_IBC_HRTBT_SHIFT 16
466 #define IBA7220_IBC_HRTBT_ENB 0x10000UL
467 #define IBA7220_IBC_LANE_REV_SUPPORTED (1<<8)
468 #define IBA7220_IBC_LREV_MASK 1
469 #define IBA7220_IBC_LREV_SHIFT 8
470 #define IBA7220_IBC_RXPOL_MASK 1
471 #define IBA7220_IBC_RXPOL_SHIFT 7
472 #define IBA7220_IBC_WIDTH_SHIFT 5
473 #define IBA7220_IBC_WIDTH_MASK 0x3
474 #define IBA7220_IBC_WIDTH_1X_ONLY (0<<IBA7220_IBC_WIDTH_SHIFT)
475 #define IBA7220_IBC_WIDTH_4X_ONLY (1<<IBA7220_IBC_WIDTH_SHIFT)
476 #define IBA7220_IBC_WIDTH_AUTONEG (2<<IBA7220_IBC_WIDTH_SHIFT)
477 #define IBA7220_IBC_SPEED_AUTONEG (1<<1)
478 #define IBA7220_IBC_SPEED_SDR (1<<2)
479 #define IBA7220_IBC_SPEED_DDR (1<<3)
480 #define IBA7220_IBC_SPEED_AUTONEG_MASK (0x7<<1)
481 #define IBA7220_IBC_IBTA_1_2_MASK (1)
482
483 /* kr_ibcddrstatus */
484 /* link latency shift is 0, don't bother defining */
485 #define IBA7220_DDRSTAT_LINKLAT_MASK 0x3ffffff
486
487 /* kr_extstatus bits */
488 #define INFINIPATH_EXTS_FREQSEL 0x2
489 #define INFINIPATH_EXTS_SERDESSEL 0x4
490 #define INFINIPATH_EXTS_MEMBIST_ENDTEST 0x0000000000004000
491 #define INFINIPATH_EXTS_MEMBIST_DISABLED 0x0000000000008000
492
493 /* kr_xgxsconfig bits */
494 #define INFINIPATH_XGXS_RESET 0x5ULL
495 #define INFINIPATH_XGXS_FC_SAFE (1ULL<<63)
496
497 /* kr_rcvpktledcnt */
498 #define IBA7220_LEDBLINK_ON_SHIFT 32 /* 4ns period on after packet */
499 #define IBA7220_LEDBLINK_OFF_SHIFT 0 /* 4ns period off before next on */
500
501 #define _IPATH_GPIO_SDA_NUM 1
502 #define _IPATH_GPIO_SCL_NUM 0
503
504 #define IPATH_GPIO_SDA (1ULL << \
505 (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
506 #define IPATH_GPIO_SCL (1ULL << \
507 (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
508
509 #define IBA7220_R_INTRAVAIL_SHIFT 17
510 #define IBA7220_R_TAILUPD_SHIFT 35
511 #define IBA7220_R_PORTCFG_SHIFT 36
512
513 #define INFINIPATH_JINT_PACKETSHIFT 16
514 #define INFINIPATH_JINT_DEFAULT_IDLE_TICKS 0
515 #define INFINIPATH_JINT_DEFAULT_MAX_PACKETS 0
516
517 #define IBA7220_HDRHEAD_PKTINT_SHIFT 32 /* interrupt cnt in upper 32 bits */
518
519 /*
520 * the size bits give us 2^N, in KB units. 0 marks as invalid,
521 * and 7 is reserved. We currently use only 2KB and 4KB
522 */
523 #define IBA7220_TID_SZ_SHIFT 37 /* shift to 3bit size selector */
524 #define IBA7220_TID_SZ_2K (1UL<<IBA7220_TID_SZ_SHIFT) /* 2KB */
525 #define IBA7220_TID_SZ_4K (2UL<<IBA7220_TID_SZ_SHIFT) /* 4KB */
526 #define IBA7220_TID_PA_SHIFT 11U /* TID addr in chip stored w/o low bits */
527
528 #define IPATH_AUTONEG_TRIES 5 /* sequential retries to negotiate DDR */
529
530 static char int_type[16] = "auto";
531 module_param_string(interrupt_type, int_type, sizeof(int_type), 0444);
532 MODULE_PARM_DESC(int_type, " interrupt_type=auto|force_msi|force_intx");
533
534 /* packet rate matching delay; chip has support */
535 static u8 rate_to_delay[2][2] = {
536 /* 1x, 4x */
537 { 8, 2 }, /* SDR */
538 { 4, 1 } /* DDR */
539 };
540
541 /* 7220 specific hardware errors... */
542 static const struct ipath_hwerror_msgs ipath_7220_hwerror_msgs[] = {
543 INFINIPATH_HWE_MSG(PCIEPOISONEDTLP, "PCIe Poisoned TLP"),
544 INFINIPATH_HWE_MSG(PCIECPLTIMEOUT, "PCIe completion timeout"),
545 /*
546 * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
547 * parity or memory parity error failures, because most likely we
548 * won't be able to talk to the core of the chip. Nonetheless, we
549 * might see them, if they are in parts of the PCIe core that aren't
550 * essential.
551 */
552 INFINIPATH_HWE_MSG(PCIE1PLLFAILED, "PCIePLL1"),
553 INFINIPATH_HWE_MSG(PCIE0PLLFAILED, "PCIePLL0"),
554 INFINIPATH_HWE_MSG(PCIEBUSPARITYXTLH, "PCIe XTLH core parity"),
555 INFINIPATH_HWE_MSG(PCIEBUSPARITYXADM, "PCIe ADM TX core parity"),
556 INFINIPATH_HWE_MSG(PCIEBUSPARITYRADM, "PCIe ADM RX core parity"),
557 INFINIPATH_HWE_MSG(RXDSYNCMEMPARITYERR, "Rx Dsync"),
558 INFINIPATH_HWE_MSG(SERDESPLLFAILED, "SerDes PLL"),
559 INFINIPATH_HWE_MSG(PCIECPLDATAQUEUEERR, "PCIe cpl header queue"),
560 INFINIPATH_HWE_MSG(PCIECPLHDRQUEUEERR, "PCIe cpl data queue"),
561 INFINIPATH_HWE_MSG(SDMAMEMREADERR, "Send DMA memory read"),
562 INFINIPATH_HWE_MSG(CLK_UC_PLLNOTLOCKED, "uC PLL clock not locked"),
563 INFINIPATH_HWE_MSG(PCIESERDESQ0PCLKNOTDETECT,
564 "PCIe serdes Q0 no clock"),
565 INFINIPATH_HWE_MSG(PCIESERDESQ1PCLKNOTDETECT,
566 "PCIe serdes Q1 no clock"),
567 INFINIPATH_HWE_MSG(PCIESERDESQ2PCLKNOTDETECT,
568 "PCIe serdes Q2 no clock"),
569 INFINIPATH_HWE_MSG(PCIESERDESQ3PCLKNOTDETECT,
570 "PCIe serdes Q3 no clock"),
571 INFINIPATH_HWE_MSG(DDSRXEQMEMORYPARITYERR,
572 "DDS RXEQ memory parity"),
573 INFINIPATH_HWE_MSG(IB_UC_MEMORYPARITYERR, "IB uC memory parity"),
574 INFINIPATH_HWE_MSG(PCIE_UC_OCT0MEMORYPARITYERR,
575 "PCIe uC oct0 memory parity"),
576 INFINIPATH_HWE_MSG(PCIE_UC_OCT1MEMORYPARITYERR,
577 "PCIe uC oct1 memory parity"),
578 };
579
580 static void autoneg_work(struct work_struct *);
581
582 /*
583 * the offset is different for different configured port numbers, since
584 * port0 is fixed in size, but others can vary. Make it a function to
585 * make the issue more obvious.
586 */
587 static inline u32 port_egrtid_idx(struct ipath_devdata *dd, unsigned port)
588 {
589 return port ? dd->ipath_p0_rcvegrcnt +
590 (port-1) * dd->ipath_rcvegrcnt : 0;
591 }
592
593 static void ipath_7220_txe_recover(struct ipath_devdata *dd)
594 {
595 ++ipath_stats.sps_txeparity;
596
597 dev_info(&dd->pcidev->dev,
598 "Recovering from TXE PIO parity error\n");
599 ipath_disarm_senderrbufs(dd);
600 }
601
602
603 /**
604 * ipath_7220_handle_hwerrors - display hardware errors.
605 * @dd: the infinipath device
606 * @msg: the output buffer
607 * @msgl: the size of the output buffer
608 *
609 * Use same msg buffer as regular errors to avoid excessive stack
610 * use. Most hardware errors are catastrophic, but for right now,
611 * we'll print them and continue. We reuse the same message buffer as
612 * ipath_handle_errors() to avoid excessive stack usage.
613 */
614 static void ipath_7220_handle_hwerrors(struct ipath_devdata *dd, char *msg,
615 size_t msgl)
616 {
617 ipath_err_t hwerrs;
618 u32 bits, ctrl;
619 int isfatal = 0;
620 char bitsmsg[64];
621 int log_idx;
622
623 hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
624 if (!hwerrs) {
625 /*
626 * better than printing cofusing messages
627 * This seems to be related to clearing the crc error, or
628 * the pll error during init.
629 */
630 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
631 goto bail;
632 } else if (hwerrs == ~0ULL) {
633 ipath_dev_err(dd, "Read of hardware error status failed "
634 "(all bits set); ignoring\n");
635 goto bail;
636 }
637 ipath_stats.sps_hwerrs++;
638
639 /*
640 * Always clear the error status register, except MEMBISTFAIL,
641 * regardless of whether we continue or stop using the chip.
642 * We want that set so we know it failed, even across driver reload.
643 * We'll still ignore it in the hwerrmask. We do this partly for
644 * diagnostics, but also for support.
645 */
646 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
647 hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
648
649 hwerrs &= dd->ipath_hwerrmask;
650
651 /* We log some errors to EEPROM, check if we have any of those. */
652 for (log_idx = 0; log_idx < IPATH_EEP_LOG_CNT; ++log_idx)
653 if (hwerrs & dd->ipath_eep_st_masks[log_idx].hwerrs_to_log)
654 ipath_inc_eeprom_err(dd, log_idx, 1);
655 /*
656 * Make sure we get this much out, unless told to be quiet,
657 * or it's occurred within the last 5 seconds.
658 */
659 if ((hwerrs & ~(dd->ipath_lasthwerror |
660 ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF |
661 INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC)
662 << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT))) ||
663 (ipath_debug & __IPATH_VERBDBG))
664 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
665 "(cleared)\n", (unsigned long long) hwerrs);
666 dd->ipath_lasthwerror |= hwerrs;
667
668 if (hwerrs & ~dd->ipath_hwe_bitsextant)
669 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
670 "%llx set\n", (unsigned long long)
671 (hwerrs & ~dd->ipath_hwe_bitsextant));
672
673 if (hwerrs & INFINIPATH_HWE_IB_UC_MEMORYPARITYERR)
674 ipath_sd7220_clr_ibpar(dd);
675
676 ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
677 if ((ctrl & INFINIPATH_C_FREEZEMODE) && !ipath_diag_inuse) {
678 /*
679 * Parity errors in send memory are recoverable by h/w
680 * just do housekeeping, exit freeze mode and continue.
681 */
682 if (hwerrs & ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF |
683 INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC)
684 << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)) {
685 ipath_7220_txe_recover(dd);
686 hwerrs &= ~((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF |
687 INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC)
688 << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT);
689 }
690 if (hwerrs) {
691 /*
692 * If any set that we aren't ignoring only make the
693 * complaint once, in case it's stuck or recurring,
694 * and we get here multiple times
695 * Force link down, so switch knows, and
696 * LEDs are turned off.
697 */
698 if (dd->ipath_flags & IPATH_INITTED) {
699 ipath_set_linkstate(dd, IPATH_IB_LINKDOWN);
700 ipath_setup_7220_setextled(dd,
701 INFINIPATH_IBCS_L_STATE_DOWN,
702 INFINIPATH_IBCS_LT_STATE_DISABLED);
703 ipath_dev_err(dd, "Fatal Hardware Error "
704 "(freeze mode), no longer"
705 " usable, SN %.16s\n",
706 dd->ipath_serial);
707 isfatal = 1;
708 }
709 /*
710 * Mark as having had an error for driver, and also
711 * for /sys and status word mapped to user programs.
712 * This marks unit as not usable, until reset.
713 */
714 *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
715 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
716 dd->ipath_flags &= ~IPATH_INITTED;
717 } else {
718 ipath_dbg("Clearing freezemode on ignored or "
719 "recovered hardware error\n");
720 ipath_clear_freeze(dd);
721 }
722 }
723
724 *msg = '\0';
725
726 if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
727 strlcat(msg, "[Memory BIST test failed, "
728 "InfiniPath hardware unusable]", msgl);
729 /* ignore from now on, so disable until driver reloaded */
730 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
731 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
732 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
733 dd->ipath_hwerrmask);
734 }
735
736 ipath_format_hwerrors(hwerrs,
737 ipath_7220_hwerror_msgs,
738 ARRAY_SIZE(ipath_7220_hwerror_msgs),
739 msg, msgl);
740
741 if (hwerrs & (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK
742 << INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT)) {
743 bits = (u32) ((hwerrs >>
744 INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) &
745 INFINIPATH_HWE_PCIEMEMPARITYERR_MASK);
746 snprintf(bitsmsg, sizeof bitsmsg,
747 "[PCIe Mem Parity Errs %x] ", bits);
748 strlcat(msg, bitsmsg, msgl);
749 }
750
751 #define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP | \
752 INFINIPATH_HWE_COREPLL_RFSLIP)
753
754 if (hwerrs & _IPATH_PLL_FAIL) {
755 snprintf(bitsmsg, sizeof bitsmsg,
756 "[PLL failed (%llx), InfiniPath hardware unusable]",
757 (unsigned long long) hwerrs & _IPATH_PLL_FAIL);
758 strlcat(msg, bitsmsg, msgl);
759 /* ignore from now on, so disable until driver reloaded */
760 dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
761 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
762 dd->ipath_hwerrmask);
763 }
764
765 if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
766 /*
767 * If it occurs, it is left masked since the eternal
768 * interface is unused.
769 */
770 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
771 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
772 dd->ipath_hwerrmask);
773 }
774
775 ipath_dev_err(dd, "%s hardware error\n", msg);
776 /*
777 * For /sys status file. if no trailing } is copied, we'll
778 * know it was truncated.
779 */
780 if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg)
781 snprintf(dd->ipath_freezemsg, dd->ipath_freezelen,
782 "{%s}", msg);
783 bail:;
784 }
785
786 /**
787 * ipath_7220_boardname - fill in the board name
788 * @dd: the infinipath device
789 * @name: the output buffer
790 * @namelen: the size of the output buffer
791 *
792 * info is based on the board revision register
793 */
794 static int ipath_7220_boardname(struct ipath_devdata *dd, char *name,
795 size_t namelen)
796 {
797 char *n = NULL;
798 u8 boardrev = dd->ipath_boardrev;
799 int ret;
800
801 if (boardrev == 15) {
802 /*
803 * Emulator sometimes comes up all-ones, rather than zero.
804 */
805 boardrev = 0;
806 dd->ipath_boardrev = boardrev;
807 }
808 switch (boardrev) {
809 case 0:
810 n = "InfiniPath_7220_Emulation";
811 break;
812 case 1:
813 n = "InfiniPath_QLE7240";
814 break;
815 case 2:
816 n = "InfiniPath_QLE7280";
817 break;
818 case 3:
819 n = "InfiniPath_QLE7242";
820 break;
821 case 4:
822 n = "InfiniPath_QEM7240";
823 break;
824 case 5:
825 n = "InfiniPath_QMI7240";
826 break;
827 case 6:
828 n = "InfiniPath_QMI7264";
829 break;
830 case 7:
831 n = "InfiniPath_QMH7240";
832 break;
833 case 8:
834 n = "InfiniPath_QME7240";
835 break;
836 case 9:
837 n = "InfiniPath_QLE7250";
838 break;
839 case 10:
840 n = "InfiniPath_QLE7290";
841 break;
842 case 11:
843 n = "InfiniPath_QEM7250";
844 break;
845 case 12:
846 n = "InfiniPath_QLE-Bringup";
847 break;
848 default:
849 ipath_dev_err(dd,
850 "Don't yet know about board with ID %u\n",
851 boardrev);
852 snprintf(name, namelen, "Unknown_InfiniPath_PCIe_%u",
853 boardrev);
854 break;
855 }
856 if (n)
857 snprintf(name, namelen, "%s", n);
858
859 if (dd->ipath_majrev != 5 || !dd->ipath_minrev ||
860 dd->ipath_minrev > 2) {
861 ipath_dev_err(dd, "Unsupported InfiniPath hardware "
862 "revision %u.%u!\n",
863 dd->ipath_majrev, dd->ipath_minrev);
864 ret = 1;
865 } else if (dd->ipath_minrev == 1 &&
866 !(dd->ipath_flags & IPATH_INITTED)) {
867 /* Rev1 chips are prototype. Complain at init, but allow use */
868 ipath_dev_err(dd, "Unsupported hardware "
869 "revision %u.%u, Contact support@qlogic.com\n",
870 dd->ipath_majrev, dd->ipath_minrev);
871 ret = 0;
872 } else
873 ret = 0;
874
875 /*
876 * Set here not in ipath_init_*_funcs because we have to do
877 * it after we can read chip registers.
878 */
879 dd->ipath_ureg_align = 0x10000; /* 64KB alignment */
880
881 return ret;
882 }
883
884 /**
885 * ipath_7220_init_hwerrors - enable hardware errors
886 * @dd: the infinipath device
887 *
888 * now that we have finished initializing everything that might reasonably
889 * cause a hardware error, and cleared those errors bits as they occur,
890 * we can enable hardware errors in the mask (potentially enabling
891 * freeze mode), and enable hardware errors as errors (along with
892 * everything else) in errormask
893 */
894 static void ipath_7220_init_hwerrors(struct ipath_devdata *dd)
895 {
896 ipath_err_t val;
897 u64 extsval;
898
899 extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
900
901 if (!(extsval & (INFINIPATH_EXTS_MEMBIST_ENDTEST |
902 INFINIPATH_EXTS_MEMBIST_DISABLED)))
903 ipath_dev_err(dd, "MemBIST did not complete!\n");
904 if (extsval & INFINIPATH_EXTS_MEMBIST_DISABLED)
905 dev_info(&dd->pcidev->dev, "MemBIST is disabled.\n");
906
907 val = ~0ULL; /* barring bugs, all hwerrors become interrupts, */
908
909 if (!dd->ipath_boardrev) /* no PLL for Emulator */
910 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
911
912 if (dd->ipath_minrev == 1)
913 val &= ~(1ULL << 42); /* TXE LaunchFIFO Parity rev1 issue */
914
915 val &= ~INFINIPATH_HWE_IB_UC_MEMORYPARITYERR;
916 dd->ipath_hwerrmask = val;
917
918 /*
919 * special trigger "error" is for debugging purposes. It
920 * works around a processor/chipset problem. The error
921 * interrupt allows us to count occurrences, but we don't
922 * want to pay the overhead for normal use. Emulation only
923 */
924 if (!dd->ipath_boardrev)
925 dd->ipath_maskederrs = INFINIPATH_E_SENDSPECIALTRIGGER;
926 }
927
928 /*
929 * All detailed interaction with the SerDes has been moved to ipath_sd7220.c
930 *
931 * The portion of IBA7220-specific bringup_serdes() that actually deals with
932 * registers and memory within the SerDes itself is ipath_sd7220_init().
933 */
934
935 /**
936 * ipath_7220_bringup_serdes - bring up the serdes
937 * @dd: the infinipath device
938 */
939 static int ipath_7220_bringup_serdes(struct ipath_devdata *dd)
940 {
941 int ret = 0;
942 u64 val, prev_val, guid;
943 int was_reset; /* Note whether uC was reset */
944
945 ipath_dbg("Trying to bringup serdes\n");
946
947 if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
948 INFINIPATH_HWE_SERDESPLLFAILED) {
949 ipath_dbg("At start, serdes PLL failed bit set "
950 "in hwerrstatus, clearing and continuing\n");
951 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
952 INFINIPATH_HWE_SERDESPLLFAILED);
953 }
954
955 dd->ibdeltainprog = 1;
956 dd->ibsymsnap =
957 ipath_read_creg32(dd, dd->ipath_cregs->cr_ibsymbolerrcnt);
958 dd->iblnkerrsnap =
959 ipath_read_creg32(dd, dd->ipath_cregs->cr_iblinkerrrecovcnt);
960
961 if (!dd->ipath_ibcddrctrl) {
962 /* not on re-init after reset */
963 dd->ipath_ibcddrctrl =
964 ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcddrctrl);
965
966 if (dd->ipath_link_speed_enabled ==
967 (IPATH_IB_SDR | IPATH_IB_DDR))
968 dd->ipath_ibcddrctrl |=
969 IBA7220_IBC_SPEED_AUTONEG_MASK |
970 IBA7220_IBC_IBTA_1_2_MASK;
971 else
972 dd->ipath_ibcddrctrl |=
973 dd->ipath_link_speed_enabled == IPATH_IB_DDR
974 ? IBA7220_IBC_SPEED_DDR :
975 IBA7220_IBC_SPEED_SDR;
976 if ((dd->ipath_link_width_enabled & (IB_WIDTH_1X |
977 IB_WIDTH_4X)) == (IB_WIDTH_1X | IB_WIDTH_4X))
978 dd->ipath_ibcddrctrl |= IBA7220_IBC_WIDTH_AUTONEG;
979 else
980 dd->ipath_ibcddrctrl |=
981 dd->ipath_link_width_enabled == IB_WIDTH_4X
982 ? IBA7220_IBC_WIDTH_4X_ONLY :
983 IBA7220_IBC_WIDTH_1X_ONLY;
984
985 /* always enable these on driver reload, not sticky */
986 dd->ipath_ibcddrctrl |=
987 IBA7220_IBC_RXPOL_MASK << IBA7220_IBC_RXPOL_SHIFT;
988 dd->ipath_ibcddrctrl |=
989 IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
990 /*
991 * automatic lane reversal detection for receive
992 * doesn't work correctly in rev 1, so disable it
993 * on that rev, otherwise enable (disabling not
994 * sticky across reload for >rev1)
995 */
996 if (dd->ipath_minrev == 1)
997 dd->ipath_ibcddrctrl &=
998 ~IBA7220_IBC_LANE_REV_SUPPORTED;
999 else
1000 dd->ipath_ibcddrctrl |=
1001 IBA7220_IBC_LANE_REV_SUPPORTED;
1002 }
1003
1004 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcddrctrl,
1005 dd->ipath_ibcddrctrl);
1006
1007 ipath_write_kreg(dd, IPATH_KREG_OFFSET(IBNCModeCtrl), 0Ull);
1008
1009 /* IBA7220 has SERDES MPU reset in D0 of what _was_ IBPLLCfg */
1010 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibserdesctrl);
1011 /* remember if uC was in Reset or not, for dactrim */
1012 was_reset = (val & 1);
1013 ipath_cdbg(VERBOSE, "IBReset %s xgxsconfig %llx\n",
1014 was_reset ? "Asserted" : "Negated", (unsigned long long)
1015 ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
1016
1017 if (dd->ipath_boardrev) {
1018 /*
1019 * Hardware is not emulator, and may have been reset. Init it.
1020 * Below will release reset, but needs to know if chip was
1021 * originally in reset, to only trim DACs on first time
1022 * after chip reset or powercycle (not driver reload)
1023 */
1024 ret = ipath_sd7220_init(dd, was_reset);
1025 }
1026
1027 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
1028 prev_val = val;
1029 val |= INFINIPATH_XGXS_FC_SAFE;
1030 if (val != prev_val) {
1031 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1032 ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1033 }
1034 if (val & INFINIPATH_XGXS_RESET)
1035 val &= ~INFINIPATH_XGXS_RESET;
1036 if (val != prev_val)
1037 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1038
1039 ipath_cdbg(VERBOSE, "done: xgxs=%llx from %llx\n",
1040 (unsigned long long)
1041 ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig),
1042 (unsigned long long) prev_val);
1043
1044 guid = be64_to_cpu(dd->ipath_guid);
1045
1046 if (!guid) {
1047 /* have to have something, so use likely unique tsc */
1048 guid = get_cycles();
1049 ipath_dbg("No GUID for heartbeat, faking %llx\n",
1050 (unsigned long long)guid);
1051 } else
1052 ipath_cdbg(VERBOSE, "Wrote %llX to HRTBT_GUID\n",
1053 (unsigned long long) guid);
1054 ipath_write_kreg(dd, dd->ipath_kregs->kr_hrtbt_guid, guid);
1055 return ret;
1056 }
1057
1058 static void ipath_7220_config_jint(struct ipath_devdata *dd,
1059 u16 idle_ticks, u16 max_packets)
1060 {
1061
1062 /*
1063 * We can request a receive interrupt for 1 or more packets
1064 * from current offset.
1065 */
1066 if (idle_ticks == 0 || max_packets == 0)
1067 /* interrupt after one packet if no mitigation */
1068 dd->ipath_rhdrhead_intr_off =
1069 1ULL << IBA7220_HDRHEAD_PKTINT_SHIFT;
1070 else
1071 /* Turn off RcvHdrHead interrupts if using mitigation */
1072 dd->ipath_rhdrhead_intr_off = 0ULL;
1073
1074 /* refresh kernel RcvHdrHead registers... */
1075 ipath_write_ureg(dd, ur_rcvhdrhead,
1076 dd->ipath_rhdrhead_intr_off |
1077 dd->ipath_pd[0]->port_head, 0);
1078
1079 dd->ipath_jint_max_packets = max_packets;
1080 dd->ipath_jint_idle_ticks = idle_ticks;
1081 ipath_write_kreg(dd, dd->ipath_kregs->kr_jintreload,
1082 ((u64) max_packets << INFINIPATH_JINT_PACKETSHIFT) |
1083 idle_ticks);
1084 }
1085
1086 /**
1087 * ipath_7220_quiet_serdes - set serdes to txidle
1088 * @dd: the infinipath device
1089 * Called when driver is being unloaded
1090 */
1091 static void ipath_7220_quiet_serdes(struct ipath_devdata *dd)
1092 {
1093 u64 val;
1094 if (dd->ibsymdelta || dd->iblnkerrdelta ||
1095 dd->ibdeltainprog) {
1096 u64 diagc;
1097 /* enable counter writes */
1098 diagc = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwdiagctrl);
1099 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwdiagctrl,
1100 diagc | INFINIPATH_DC_COUNTERWREN);
1101
1102 if (dd->ibsymdelta || dd->ibdeltainprog) {
1103 val = ipath_read_creg32(dd,
1104 dd->ipath_cregs->cr_ibsymbolerrcnt);
1105 if (dd->ibdeltainprog)
1106 val -= val - dd->ibsymsnap;
1107 val -= dd->ibsymdelta;
1108 ipath_write_creg(dd,
1109 dd->ipath_cregs->cr_ibsymbolerrcnt, val);
1110 }
1111 if (dd->iblnkerrdelta || dd->ibdeltainprog) {
1112 val = ipath_read_creg32(dd,
1113 dd->ipath_cregs->cr_iblinkerrrecovcnt);
1114 if (dd->ibdeltainprog)
1115 val -= val - dd->iblnkerrsnap;
1116 val -= dd->iblnkerrdelta;
1117 ipath_write_creg(dd,
1118 dd->ipath_cregs->cr_iblinkerrrecovcnt, val);
1119 }
1120
1121 /* and disable counter writes */
1122 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwdiagctrl, diagc);
1123 }
1124
1125 dd->ipath_flags &= ~IPATH_IB_AUTONEG_INPROG;
1126 wake_up(&dd->ipath_autoneg_wait);
1127 cancel_delayed_work(&dd->ipath_autoneg_work);
1128 flush_scheduled_work();
1129 ipath_shutdown_relock_poll(dd);
1130 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
1131 val |= INFINIPATH_XGXS_RESET;
1132 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1133 }
1134
1135 static int ipath_7220_intconfig(struct ipath_devdata *dd)
1136 {
1137 ipath_7220_config_jint(dd, dd->ipath_jint_idle_ticks,
1138 dd->ipath_jint_max_packets);
1139 return 0;
1140 }
1141
1142 /**
1143 * ipath_setup_7220_setextled - set the state of the two external LEDs
1144 * @dd: the infinipath device
1145 * @lst: the L state
1146 * @ltst: the LT state
1147 *
1148 * These LEDs indicate the physical and logical state of IB link.
1149 * For this chip (at least with recommended board pinouts), LED1
1150 * is Yellow (logical state) and LED2 is Green (physical state),
1151 *
1152 * Note: We try to match the Mellanox HCA LED behavior as best
1153 * we can. Green indicates physical link state is OK (something is
1154 * plugged in, and we can train).
1155 * Amber indicates the link is logically up (ACTIVE).
1156 * Mellanox further blinks the amber LED to indicate data packet
1157 * activity, but we have no hardware support for that, so it would
1158 * require waking up every 10-20 msecs and checking the counters
1159 * on the chip, and then turning the LED off if appropriate. That's
1160 * visible overhead, so not something we will do.
1161 *
1162 */
1163 static void ipath_setup_7220_setextled(struct ipath_devdata *dd, u64 lst,
1164 u64 ltst)
1165 {
1166 u64 extctl, ledblink = 0;
1167 unsigned long flags = 0;
1168
1169 /* the diags use the LED to indicate diag info, so we leave
1170 * the external LED alone when the diags are running */
1171 if (ipath_diag_inuse)
1172 return;
1173
1174 /* Allow override of LED display for, e.g. Locating system in rack */
1175 if (dd->ipath_led_override) {
1176 ltst = (dd->ipath_led_override & IPATH_LED_PHYS)
1177 ? INFINIPATH_IBCS_LT_STATE_LINKUP
1178 : INFINIPATH_IBCS_LT_STATE_DISABLED;
1179 lst = (dd->ipath_led_override & IPATH_LED_LOG)
1180 ? INFINIPATH_IBCS_L_STATE_ACTIVE
1181 : INFINIPATH_IBCS_L_STATE_DOWN;
1182 }
1183
1184 spin_lock_irqsave(&dd->ipath_gpio_lock, flags);
1185 extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
1186 INFINIPATH_EXTC_LED2PRIPORT_ON);
1187 if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP) {
1188 extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
1189 /*
1190 * counts are in chip clock (4ns) periods.
1191 * This is 1/16 sec (66.6ms) on,
1192 * 3/16 sec (187.5 ms) off, with packets rcvd
1193 */
1194 ledblink = ((66600*1000UL/4) << IBA7220_LEDBLINK_ON_SHIFT)
1195 | ((187500*1000UL/4) << IBA7220_LEDBLINK_OFF_SHIFT);
1196 }
1197 if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
1198 extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
1199 dd->ipath_extctrl = extctl;
1200 ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
1201 spin_unlock_irqrestore(&dd->ipath_gpio_lock, flags);
1202
1203 if (ledblink) /* blink the LED on packet receive */
1204 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvpktledcnt,
1205 ledblink);
1206 }
1207
1208 /*
1209 * Similar to pci_intx(pdev, 1), except that we make sure
1210 * msi is off...
1211 */
1212 static void ipath_enable_intx(struct pci_dev *pdev)
1213 {
1214 u16 cw, new;
1215 int pos;
1216
1217 /* first, turn on INTx */
1218 pci_read_config_word(pdev, PCI_COMMAND, &cw);
1219 new = cw & ~PCI_COMMAND_INTX_DISABLE;
1220 if (new != cw)
1221 pci_write_config_word(pdev, PCI_COMMAND, new);
1222
1223 /* then turn off MSI */
1224 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
1225 if (pos) {
1226 pci_read_config_word(pdev, pos + PCI_MSI_FLAGS, &cw);
1227 new = cw & ~PCI_MSI_FLAGS_ENABLE;
1228 if (new != cw)
1229 pci_write_config_word(pdev, pos + PCI_MSI_FLAGS, new);
1230 }
1231 }
1232
1233 static int ipath_msi_enabled(struct pci_dev *pdev)
1234 {
1235 int pos, ret = 0;
1236
1237 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
1238 if (pos) {
1239 u16 cw;
1240
1241 pci_read_config_word(pdev, pos + PCI_MSI_FLAGS, &cw);
1242 ret = !!(cw & PCI_MSI_FLAGS_ENABLE);
1243 }
1244 return ret;
1245 }
1246
1247 /*
1248 * disable msi interrupt if enabled, and clear the flag.
1249 * flag is used primarily for the fallback to INTx, but
1250 * is also used in reinit after reset as a flag.
1251 */
1252 static void ipath_7220_nomsi(struct ipath_devdata *dd)
1253 {
1254 dd->ipath_msi_lo = 0;
1255
1256 if (ipath_msi_enabled(dd->pcidev)) {
1257 /*
1258 * free, but don't zero; later kernels require
1259 * it be freed before disable_msi, so the intx
1260 * setup has to request it again.
1261 */
1262 if (dd->ipath_irq)
1263 free_irq(dd->ipath_irq, dd);
1264 pci_disable_msi(dd->pcidev);
1265 }
1266 }
1267
1268 /*
1269 * ipath_setup_7220_cleanup - clean up any per-chip chip-specific stuff
1270 * @dd: the infinipath device
1271 *
1272 * Nothing but msi interrupt cleanup for now.
1273 *
1274 * This is called during driver unload.
1275 */
1276 static void ipath_setup_7220_cleanup(struct ipath_devdata *dd)
1277 {
1278 ipath_7220_nomsi(dd);
1279 }
1280
1281
1282 static void ipath_7220_pcie_params(struct ipath_devdata *dd, u32 boardrev)
1283 {
1284 u16 linkstat, minwidth, speed;
1285 int pos;
1286
1287 pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP);
1288 if (!pos) {
1289 ipath_dev_err(dd, "Can't find PCI Express capability!\n");
1290 goto bail;
1291 }
1292
1293 pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
1294 &linkstat);
1295 /*
1296 * speed is bits 0-4, linkwidth is bits 4-8
1297 * no defines for them in headers
1298 */
1299 speed = linkstat & 0xf;
1300 linkstat >>= 4;
1301 linkstat &= 0x1f;
1302 dd->ipath_lbus_width = linkstat;
1303 switch (boardrev) {
1304 case 0:
1305 case 2:
1306 case 10:
1307 case 12:
1308 minwidth = 16; /* x16 capable boards */
1309 break;
1310 default:
1311 minwidth = 8; /* x8 capable boards */
1312 break;
1313 }
1314
1315 switch (speed) {
1316 case 1:
1317 dd->ipath_lbus_speed = 2500; /* Gen1, 2.5GHz */
1318 break;
1319 case 2:
1320 dd->ipath_lbus_speed = 5000; /* Gen1, 5GHz */
1321 break;
1322 default: /* not defined, assume gen1 */
1323 dd->ipath_lbus_speed = 2500;
1324 break;
1325 }
1326
1327 if (linkstat < minwidth)
1328 ipath_dev_err(dd,
1329 "PCIe width %u (x%u HCA), performance "
1330 "reduced\n", linkstat, minwidth);
1331 else
1332 ipath_cdbg(VERBOSE, "PCIe speed %u width %u (x%u HCA)\n",
1333 dd->ipath_lbus_speed, linkstat, minwidth);
1334
1335 if (speed != 1)
1336 ipath_dev_err(dd,
1337 "PCIe linkspeed %u is incorrect; "
1338 "should be 1 (2500)!\n", speed);
1339
1340 bail:
1341 /* fill in string, even on errors */
1342 snprintf(dd->ipath_lbus_info, sizeof(dd->ipath_lbus_info),
1343 "PCIe,%uMHz,x%u\n",
1344 dd->ipath_lbus_speed,
1345 dd->ipath_lbus_width);
1346 return;
1347 }
1348
1349
1350 /**
1351 * ipath_setup_7220_config - setup PCIe config related stuff
1352 * @dd: the infinipath device
1353 * @pdev: the PCI device
1354 *
1355 * The pci_enable_msi() call will fail on systems with MSI quirks
1356 * such as those with AMD8131, even if the device of interest is not
1357 * attached to that device, (in the 2.6.13 - 2.6.15 kernels, at least, fixed
1358 * late in 2.6.16).
1359 * All that can be done is to edit the kernel source to remove the quirk
1360 * check until that is fixed.
1361 * We do not need to call enable_msi() for our HyperTransport chip,
1362 * even though it uses MSI, and we want to avoid the quirk warning, so
1363 * So we call enable_msi only for PCIe. If we do end up needing
1364 * pci_enable_msi at some point in the future for HT, we'll move the
1365 * call back into the main init_one code.
1366 * We save the msi lo and hi values, so we can restore them after
1367 * chip reset (the kernel PCI infrastructure doesn't yet handle that
1368 * correctly).
1369 */
1370 static int ipath_setup_7220_config(struct ipath_devdata *dd,
1371 struct pci_dev *pdev)
1372 {
1373 int pos, ret = -1;
1374 u32 boardrev;
1375
1376 dd->ipath_msi_lo = 0; /* used as a flag during reset processing */
1377
1378 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
1379 if (!strcmp(int_type, "force_msi") || !strcmp(int_type, "auto"))
1380 ret = pci_enable_msi(pdev);
1381 if (ret) {
1382 if (!strcmp(int_type, "force_msi")) {
1383 ipath_dev_err(dd, "pci_enable_msi failed: %d, "
1384 "force_msi is on, so not continuing.\n",
1385 ret);
1386 return ret;
1387 }
1388
1389 ipath_enable_intx(pdev);
1390 if (!strcmp(int_type, "auto"))
1391 ipath_dev_err(dd, "pci_enable_msi failed: %d, "
1392 "falling back to INTx\n", ret);
1393 } else if (pos) {
1394 u16 control;
1395 pci_read_config_dword(pdev, pos + PCI_MSI_ADDRESS_LO,
1396 &dd->ipath_msi_lo);
1397 pci_read_config_dword(pdev, pos + PCI_MSI_ADDRESS_HI,
1398 &dd->ipath_msi_hi);
1399 pci_read_config_word(pdev, pos + PCI_MSI_FLAGS,
1400 &control);
1401 /* now save the data (vector) info */
1402 pci_read_config_word(pdev,
1403 pos + ((control & PCI_MSI_FLAGS_64BIT)
1404 ? PCI_MSI_DATA_64 :
1405 PCI_MSI_DATA_32),
1406 &dd->ipath_msi_data);
1407 } else
1408 ipath_dev_err(dd, "Can't find MSI capability, "
1409 "can't save MSI settings for reset\n");
1410
1411 dd->ipath_irq = pdev->irq;
1412
1413 /*
1414 * We save the cachelinesize also, although it doesn't
1415 * really matter.
1416 */
1417 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE,
1418 &dd->ipath_pci_cacheline);
1419
1420 /*
1421 * this function called early, ipath_boardrev not set yet. Can't
1422 * use ipath_read_kreg64() yet, too early in init, so use readq()
1423 */
1424 boardrev = (readq(&dd->ipath_kregbase[dd->ipath_kregs->kr_revision])
1425 >> INFINIPATH_R_BOARDID_SHIFT) & INFINIPATH_R_BOARDID_MASK;
1426
1427 ipath_7220_pcie_params(dd, boardrev);
1428
1429 dd->ipath_flags |= IPATH_NODMA_RTAIL | IPATH_HAS_SEND_DMA |
1430 IPATH_HAS_PBC_CNT | IPATH_HAS_THRESH_UPDATE;
1431 dd->ipath_pioupd_thresh = 4U; /* set default update threshold */
1432 return 0;
1433 }
1434
1435 static void ipath_init_7220_variables(struct ipath_devdata *dd)
1436 {
1437 /*
1438 * setup the register offsets, since they are different for each
1439 * chip
1440 */
1441 dd->ipath_kregs = &ipath_7220_kregs;
1442 dd->ipath_cregs = &ipath_7220_cregs;
1443
1444 /*
1445 * bits for selecting i2c direction and values,
1446 * used for I2C serial flash
1447 */
1448 dd->ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
1449 dd->ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
1450 dd->ipath_gpio_sda = IPATH_GPIO_SDA;
1451 dd->ipath_gpio_scl = IPATH_GPIO_SCL;
1452
1453 /*
1454 * Fill in data for field-values that change in IBA7220.
1455 * We dynamically specify only the mask for LINKTRAININGSTATE
1456 * and only the shift for LINKSTATE, as they are the only ones
1457 * that change. Also precalculate the 3 link states of interest
1458 * and the combined mask.
1459 */
1460 dd->ibcs_ls_shift = IBA7220_IBCS_LINKSTATE_SHIFT;
1461 dd->ibcs_lts_mask = IBA7220_IBCS_LINKTRAININGSTATE_MASK;
1462 dd->ibcs_mask = (INFINIPATH_IBCS_LINKSTATE_MASK <<
1463 dd->ibcs_ls_shift) | dd->ibcs_lts_mask;
1464 dd->ib_init = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1465 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1466 (INFINIPATH_IBCS_L_STATE_INIT << dd->ibcs_ls_shift);
1467 dd->ib_arm = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1468 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1469 (INFINIPATH_IBCS_L_STATE_ARM << dd->ibcs_ls_shift);
1470 dd->ib_active = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1471 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1472 (INFINIPATH_IBCS_L_STATE_ACTIVE << dd->ibcs_ls_shift);
1473
1474 /*
1475 * Fill in data for ibcc field-values that change in IBA7220.
1476 * We dynamically specify only the mask for LINKINITCMD
1477 * and only the shift for LINKCMD and MAXPKTLEN, as they are
1478 * the only ones that change.
1479 */
1480 dd->ibcc_lic_mask = IBA7220_IBCC_LINKINITCMD_MASK;
1481 dd->ibcc_lc_shift = IBA7220_IBCC_LINKCMD_SHIFT;
1482 dd->ibcc_mpl_shift = IBA7220_IBCC_MAXPKTLEN_SHIFT;
1483
1484 /* Fill in shifts for RcvCtrl. */
1485 dd->ipath_r_portenable_shift = INFINIPATH_R_PORTENABLE_SHIFT;
1486 dd->ipath_r_intravail_shift = IBA7220_R_INTRAVAIL_SHIFT;
1487 dd->ipath_r_tailupd_shift = IBA7220_R_TAILUPD_SHIFT;
1488 dd->ipath_r_portcfg_shift = IBA7220_R_PORTCFG_SHIFT;
1489
1490 /* variables for sanity checking interrupt and errors */
1491 dd->ipath_hwe_bitsextant =
1492 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1493 INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
1494 (INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1495 INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) |
1496 (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK <<
1497 INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) |
1498 INFINIPATH_HWE_PCIE1PLLFAILED |
1499 INFINIPATH_HWE_PCIE0PLLFAILED |
1500 INFINIPATH_HWE_PCIEPOISONEDTLP |
1501 INFINIPATH_HWE_PCIECPLTIMEOUT |
1502 INFINIPATH_HWE_PCIEBUSPARITYXTLH |
1503 INFINIPATH_HWE_PCIEBUSPARITYXADM |
1504 INFINIPATH_HWE_PCIEBUSPARITYRADM |
1505 INFINIPATH_HWE_MEMBISTFAILED |
1506 INFINIPATH_HWE_COREPLL_FBSLIP |
1507 INFINIPATH_HWE_COREPLL_RFSLIP |
1508 INFINIPATH_HWE_SERDESPLLFAILED |
1509 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
1510 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR |
1511 INFINIPATH_HWE_PCIECPLDATAQUEUEERR |
1512 INFINIPATH_HWE_PCIECPLHDRQUEUEERR |
1513 INFINIPATH_HWE_SDMAMEMREADERR |
1514 INFINIPATH_HWE_CLK_UC_PLLNOTLOCKED |
1515 INFINIPATH_HWE_PCIESERDESQ0PCLKNOTDETECT |
1516 INFINIPATH_HWE_PCIESERDESQ1PCLKNOTDETECT |
1517 INFINIPATH_HWE_PCIESERDESQ2PCLKNOTDETECT |
1518 INFINIPATH_HWE_PCIESERDESQ3PCLKNOTDETECT |
1519 INFINIPATH_HWE_DDSRXEQMEMORYPARITYERR |
1520 INFINIPATH_HWE_IB_UC_MEMORYPARITYERR |
1521 INFINIPATH_HWE_PCIE_UC_OCT0MEMORYPARITYERR |
1522 INFINIPATH_HWE_PCIE_UC_OCT1MEMORYPARITYERR;
1523 dd->ipath_i_bitsextant =
1524 INFINIPATH_I_SDMAINT | INFINIPATH_I_SDMADISABLED |
1525 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
1526 (INFINIPATH_I_RCVAVAIL_MASK <<
1527 INFINIPATH_I_RCVAVAIL_SHIFT) |
1528 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
1529 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO |
1530 INFINIPATH_I_JINT | INFINIPATH_I_SERDESTRIMDONE;
1531 dd->ipath_e_bitsextant =
1532 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
1533 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
1534 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
1535 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
1536 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
1537 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
1538 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
1539 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
1540 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
1541 INFINIPATH_E_SENDSPECIALTRIGGER |
1542 INFINIPATH_E_SDMADISABLED | INFINIPATH_E_SMINPKTLEN |
1543 INFINIPATH_E_SMAXPKTLEN | INFINIPATH_E_SUNDERRUN |
1544 INFINIPATH_E_SPKTLEN | INFINIPATH_E_SDROPPEDSMPPKT |
1545 INFINIPATH_E_SDROPPEDDATAPKT |
1546 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
1547 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_SENDBUFMISUSE |
1548 INFINIPATH_E_SDMAGENMISMATCH | INFINIPATH_E_SDMAOUTOFBOUND |
1549 INFINIPATH_E_SDMATAILOUTOFBOUND | INFINIPATH_E_SDMABASE |
1550 INFINIPATH_E_SDMA1STDESC | INFINIPATH_E_SDMARPYTAG |
1551 INFINIPATH_E_SDMADWEN | INFINIPATH_E_SDMAMISSINGDW |
1552 INFINIPATH_E_SDMAUNEXPDATA |
1553 INFINIPATH_E_IBSTATUSCHANGED | INFINIPATH_E_INVALIDADDR |
1554 INFINIPATH_E_RESET | INFINIPATH_E_HARDWARE |
1555 INFINIPATH_E_SDMADESCADDRMISALIGN |
1556 INFINIPATH_E_INVALIDEEPCMD;
1557
1558 dd->ipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
1559 dd->ipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
1560 dd->ipath_i_rcvavail_shift = INFINIPATH_I_RCVAVAIL_SHIFT;
1561 dd->ipath_i_rcvurg_shift = INFINIPATH_I_RCVURG_SHIFT;
1562 dd->ipath_flags |= IPATH_INTREG_64 | IPATH_HAS_MULT_IB_SPEED
1563 | IPATH_HAS_LINK_LATENCY;
1564
1565 /*
1566 * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
1567 * 2 is Some Misc, 3 is reserved for future.
1568 */
1569 dd->ipath_eep_st_masks[0].hwerrs_to_log =
1570 INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1571 INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT;
1572
1573 dd->ipath_eep_st_masks[1].hwerrs_to_log =
1574 INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1575 INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT;
1576
1577 dd->ipath_eep_st_masks[2].errs_to_log = INFINIPATH_E_RESET;
1578
1579 ipath_linkrecovery = 0;
1580
1581 init_waitqueue_head(&dd->ipath_autoneg_wait);
1582 INIT_DELAYED_WORK(&dd->ipath_autoneg_work, autoneg_work);
1583
1584 dd->ipath_link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
1585 dd->ipath_link_speed_supported = IPATH_IB_SDR | IPATH_IB_DDR;
1586
1587 dd->ipath_link_width_enabled = dd->ipath_link_width_supported;
1588 dd->ipath_link_speed_enabled = dd->ipath_link_speed_supported;
1589 /*
1590 * set the initial values to reasonable default, will be set
1591 * for real when link is up.
1592 */
1593 dd->ipath_link_width_active = IB_WIDTH_4X;
1594 dd->ipath_link_speed_active = IPATH_IB_SDR;
1595 dd->delay_mult = rate_to_delay[0][1];
1596 }
1597
1598
1599 /*
1600 * Setup the MSI stuff again after a reset. I'd like to just call
1601 * pci_enable_msi() and request_irq() again, but when I do that,
1602 * the MSI enable bit doesn't get set in the command word, and
1603 * we switch to to a different interrupt vector, which is confusing,
1604 * so I instead just do it all inline. Perhaps somehow can tie this
1605 * into the PCIe hotplug support at some point
1606 * Note, because I'm doing it all here, I don't call pci_disable_msi()
1607 * or free_irq() at the start of ipath_setup_7220_reset().
1608 */
1609 static int ipath_reinit_msi(struct ipath_devdata *dd)
1610 {
1611 int ret = 0;
1612
1613 int pos;
1614 u16 control;
1615 if (!dd->ipath_msi_lo) /* Using intX, or init problem */
1616 goto bail;
1617
1618 pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI);
1619 if (!pos) {
1620 ipath_dev_err(dd, "Can't find MSI capability, "
1621 "can't restore MSI settings\n");
1622 goto bail;
1623 }
1624 ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
1625 dd->ipath_msi_lo, pos + PCI_MSI_ADDRESS_LO);
1626 pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
1627 dd->ipath_msi_lo);
1628 ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
1629 dd->ipath_msi_hi, pos + PCI_MSI_ADDRESS_HI);
1630 pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
1631 dd->ipath_msi_hi);
1632 pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
1633 if (!(control & PCI_MSI_FLAGS_ENABLE)) {
1634 ipath_cdbg(VERBOSE, "MSI control at off %x was %x, "
1635 "setting MSI enable (%x)\n", pos + PCI_MSI_FLAGS,
1636 control, control | PCI_MSI_FLAGS_ENABLE);
1637 control |= PCI_MSI_FLAGS_ENABLE;
1638 pci_write_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
1639 control);
1640 }
1641 /* now rewrite the data (vector) info */
1642 pci_write_config_word(dd->pcidev, pos +
1643 ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
1644 dd->ipath_msi_data);
1645 ret = 1;
1646
1647 bail:
1648 if (!ret) {
1649 ipath_dbg("Using INTx, MSI disabled or not configured\n");
1650 ipath_enable_intx(dd->pcidev);
1651 ret = 1;
1652 }
1653 /*
1654 * We restore the cachelinesize also, although it doesn't really
1655 * matter.
1656 */
1657 pci_write_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
1658 dd->ipath_pci_cacheline);
1659 /* and now set the pci master bit again */
1660 pci_set_master(dd->pcidev);
1661
1662 return ret;
1663 }
1664
1665 /*
1666 * This routine sleeps, so it can only be called from user context, not
1667 * from interrupt context. If we need interrupt context, we can split
1668 * it into two routines.
1669 */
1670 static int ipath_setup_7220_reset(struct ipath_devdata *dd)
1671 {
1672 u64 val;
1673 int i;
1674 int ret;
1675 u16 cmdval;
1676
1677 pci_read_config_word(dd->pcidev, PCI_COMMAND, &cmdval);
1678
1679 /* Use dev_err so it shows up in logs, etc. */
1680 ipath_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->ipath_unit);
1681
1682 /* keep chip from being accessed in a few places */
1683 dd->ipath_flags &= ~(IPATH_INITTED | IPATH_PRESENT);
1684 val = dd->ipath_control | INFINIPATH_C_RESET;
1685 ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
1686 mb();
1687
1688 for (i = 1; i <= 5; i++) {
1689 int r;
1690
1691 /*
1692 * Allow MBIST, etc. to complete; longer on each retry.
1693 * We sometimes get machine checks from bus timeout if no
1694 * response, so for now, make it *really* long.
1695 */
1696 msleep(1000 + (1 + i) * 2000);
1697 r = pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
1698 dd->ipath_pcibar0);
1699 if (r)
1700 ipath_dev_err(dd, "rewrite of BAR0 failed: %d\n", r);
1701 r = pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
1702 dd->ipath_pcibar1);
1703 if (r)
1704 ipath_dev_err(dd, "rewrite of BAR1 failed: %d\n", r);
1705 /* now re-enable memory access */
1706 pci_write_config_word(dd->pcidev, PCI_COMMAND, cmdval);
1707 r = pci_enable_device(dd->pcidev);
1708 if (r)
1709 ipath_dev_err(dd, "pci_enable_device failed after "
1710 "reset: %d\n", r);
1711 /*
1712 * whether it fully enabled or not, mark as present,
1713 * again (but not INITTED)
1714 */
1715 dd->ipath_flags |= IPATH_PRESENT;
1716 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
1717 if (val == dd->ipath_revision) {
1718 ipath_cdbg(VERBOSE, "Got matching revision "
1719 "register %llx on try %d\n",
1720 (unsigned long long) val, i);
1721 ret = ipath_reinit_msi(dd);
1722 goto bail;
1723 }
1724 /* Probably getting -1 back */
1725 ipath_dbg("Didn't get expected revision register, "
1726 "got %llx, try %d\n", (unsigned long long) val,
1727 i + 1);
1728 }
1729 ret = 0; /* failed */
1730
1731 bail:
1732 if (ret)
1733 ipath_7220_pcie_params(dd, dd->ipath_boardrev);
1734
1735 return ret;
1736 }
1737
1738 /**
1739 * ipath_7220_put_tid - write a TID to the chip
1740 * @dd: the infinipath device
1741 * @tidptr: pointer to the expected TID (in chip) to update
1742 * @tidtype: 0 for eager, 1 for expected
1743 * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1744 *
1745 * This exists as a separate routine to allow for selection of the
1746 * appropriate "flavor". The static calls in cleanup just use the
1747 * revision-agnostic form, as they are not performance critical.
1748 */
1749 static void ipath_7220_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
1750 u32 type, unsigned long pa)
1751 {
1752 if (pa != dd->ipath_tidinvalid) {
1753 u64 chippa = pa >> IBA7220_TID_PA_SHIFT;
1754
1755 /* paranoia checks */
1756 if (pa != (chippa << IBA7220_TID_PA_SHIFT)) {
1757 dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1758 "not 2KB aligned!\n", pa);
1759 return;
1760 }
1761 if (chippa >= (1UL << IBA7220_TID_SZ_SHIFT)) {
1762 ipath_dev_err(dd,
1763 "BUG: Physical page address 0x%lx "
1764 "larger than supported\n", pa);
1765 return;
1766 }
1767
1768 if (type == RCVHQ_RCV_TYPE_EAGER)
1769 chippa |= dd->ipath_tidtemplate;
1770 else /* for now, always full 4KB page */
1771 chippa |= IBA7220_TID_SZ_4K;
1772 writeq(chippa, tidptr);
1773 } else
1774 writeq(pa, tidptr);
1775 mmiowb();
1776 }
1777
1778 /**
1779 * ipath_7220_clear_tid - clear all TID entries for a port, expected and eager
1780 * @dd: the infinipath device
1781 * @port: the port
1782 *
1783 * clear all TID entries for a port, expected and eager.
1784 * Used from ipath_close(). On this chip, TIDs are only 32 bits,
1785 * not 64, but they are still on 64 bit boundaries, so tidbase
1786 * is declared as u64 * for the pointer math, even though we write 32 bits
1787 */
1788 static void ipath_7220_clear_tids(struct ipath_devdata *dd, unsigned port)
1789 {
1790 u64 __iomem *tidbase;
1791 unsigned long tidinv;
1792 int i;
1793
1794 if (!dd->ipath_kregbase)
1795 return;
1796
1797 ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1798
1799 tidinv = dd->ipath_tidinvalid;
1800 tidbase = (u64 __iomem *)
1801 ((char __iomem *)(dd->ipath_kregbase) +
1802 dd->ipath_rcvtidbase +
1803 port * dd->ipath_rcvtidcnt * sizeof(*tidbase));
1804
1805 for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1806 ipath_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
1807 tidinv);
1808
1809 tidbase = (u64 __iomem *)
1810 ((char __iomem *)(dd->ipath_kregbase) +
1811 dd->ipath_rcvegrbase + port_egrtid_idx(dd, port)
1812 * sizeof(*tidbase));
1813
1814 for (i = port ? dd->ipath_rcvegrcnt : dd->ipath_p0_rcvegrcnt; i; i--)
1815 ipath_7220_put_tid(dd, &tidbase[i-1], RCVHQ_RCV_TYPE_EAGER,
1816 tidinv);
1817 }
1818
1819 /**
1820 * ipath_7220_tidtemplate - setup constants for TID updates
1821 * @dd: the infinipath device
1822 *
1823 * We setup stuff that we use a lot, to avoid calculating each time
1824 */
1825 static void ipath_7220_tidtemplate(struct ipath_devdata *dd)
1826 {
1827 /* For now, we always allocate 4KB buffers (at init) so we can
1828 * receive max size packets. We may want a module parameter to
1829 * specify 2KB or 4KB and/or make be per port instead of per device
1830 * for those who want to reduce memory footprint. Note that the
1831 * ipath_rcvhdrentsize size must be large enough to hold the largest
1832 * IB header (currently 96 bytes) that we expect to handle (plus of
1833 * course the 2 dwords of RHF).
1834 */
1835 if (dd->ipath_rcvegrbufsize == 2048)
1836 dd->ipath_tidtemplate = IBA7220_TID_SZ_2K;
1837 else if (dd->ipath_rcvegrbufsize == 4096)
1838 dd->ipath_tidtemplate = IBA7220_TID_SZ_4K;
1839 else {
1840 dev_info(&dd->pcidev->dev, "BUG: unsupported egrbufsize "
1841 "%u, using %u\n", dd->ipath_rcvegrbufsize,
1842 4096);
1843 dd->ipath_tidtemplate = IBA7220_TID_SZ_4K;
1844 }
1845 dd->ipath_tidinvalid = 0;
1846 }
1847
1848 static int ipath_7220_early_init(struct ipath_devdata *dd)
1849 {
1850 u32 i, s;
1851
1852 if (strcmp(int_type, "auto") &&
1853 strcmp(int_type, "force_msi") &&
1854 strcmp(int_type, "force_intx")) {
1855 ipath_dev_err(dd, "Invalid interrupt_type: '%s', expecting "
1856 "auto, force_msi or force_intx\n", int_type);
1857 return -EINVAL;
1858 }
1859
1860 /*
1861 * Control[4] has been added to change the arbitration within
1862 * the SDMA engine between favoring data fetches over descriptor
1863 * fetches. ipath_sdma_fetch_arb==0 gives data fetches priority.
1864 */
1865 if (ipath_sdma_fetch_arb && (dd->ipath_minrev > 1))
1866 dd->ipath_control |= 1<<4;
1867
1868 dd->ipath_flags |= IPATH_4BYTE_TID;
1869
1870 /*
1871 * For openfabrics, we need to be able to handle an IB header of
1872 * 24 dwords. HT chip has arbitrary sized receive buffers, so we
1873 * made them the same size as the PIO buffers. This chip does not
1874 * handle arbitrary size buffers, so we need the header large enough
1875 * to handle largest IB header, but still have room for a 2KB MTU
1876 * standard IB packet.
1877 */
1878 dd->ipath_rcvhdrentsize = 24;
1879 dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1880 dd->ipath_rhf_offset =
1881 dd->ipath_rcvhdrentsize - sizeof(u64) / sizeof(u32);
1882
1883 dd->ipath_rcvegrbufsize = ipath_mtu4096 ? 4096 : 2048;
1884 /*
1885 * the min() check here is currently a nop, but it may not always
1886 * be, depending on just how we do ipath_rcvegrbufsize
1887 */
1888 dd->ipath_ibmaxlen = min(ipath_mtu4096 ? dd->ipath_piosize4k :
1889 dd->ipath_piosize2k,
1890 dd->ipath_rcvegrbufsize +
1891 (dd->ipath_rcvhdrentsize << 2));
1892 dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1893
1894 ipath_7220_config_jint(dd, INFINIPATH_JINT_DEFAULT_IDLE_TICKS,
1895 INFINIPATH_JINT_DEFAULT_MAX_PACKETS);
1896
1897 if (dd->ipath_boardrev) /* no eeprom on emulator */
1898 ipath_get_eeprom_info(dd);
1899
1900 /* start of code to check and print procmon */
1901 s = ipath_read_kreg32(dd, IPATH_KREG_OFFSET(ProcMon));
1902 s &= ~(1U<<31); /* clear done bit */
1903 s |= 1U<<14; /* clear counter (write 1 to clear) */
1904 ipath_write_kreg(dd, IPATH_KREG_OFFSET(ProcMon), s);
1905 /* make sure clear_counter low long enough before start */
1906 ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1907 ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1908
1909 s &= ~(1U<<14); /* allow counter to count (before starting) */
1910 ipath_write_kreg(dd, IPATH_KREG_OFFSET(ProcMon), s);
1911 ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1912 ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1913 s = ipath_read_kreg32(dd, IPATH_KREG_OFFSET(ProcMon));
1914
1915 s |= 1U<<15; /* start the counter */
1916 s &= ~(1U<<31); /* clear done bit */
1917 s &= ~0x7ffU; /* clear frequency bits */
1918 s |= 0xe29; /* set frequency bits, in case cleared */
1919 ipath_write_kreg(dd, IPATH_KREG_OFFSET(ProcMon), s);
1920
1921 s = 0;
1922 for (i = 500; i > 0 && !(s&(1ULL<<31)); i--) {
1923 ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1924 s = ipath_read_kreg32(dd, IPATH_KREG_OFFSET(ProcMon));
1925 }
1926 if (!(s&(1U<<31)))
1927 ipath_dev_err(dd, "ProcMon register not valid: 0x%x\n", s);
1928 else
1929 ipath_dbg("ProcMon=0x%x, count=0x%x\n", s, (s>>16)&0x1ff);
1930
1931 return 0;
1932 }
1933
1934 /**
1935 * ipath_init_7220_get_base_info - set chip-specific flags for user code
1936 * @pd: the infinipath port
1937 * @kbase: ipath_base_info pointer
1938 *
1939 * We set the PCIE flag because the lower bandwidth on PCIe vs
1940 * HyperTransport can affect some user packet algorithims.
1941 */
1942 static int ipath_7220_get_base_info(struct ipath_portdata *pd, void *kbase)
1943 {
1944 struct ipath_base_info *kinfo = kbase;
1945
1946 kinfo->spi_runtime_flags |=
1947 IPATH_RUNTIME_PCIE | IPATH_RUNTIME_NODMA_RTAIL |
1948 IPATH_RUNTIME_SDMA;
1949
1950 return 0;
1951 }
1952
1953 static void ipath_7220_free_irq(struct ipath_devdata *dd)
1954 {
1955 free_irq(dd->ipath_irq, dd);
1956 dd->ipath_irq = 0;
1957 }
1958
1959 static struct ipath_message_header *
1960 ipath_7220_get_msgheader(struct ipath_devdata *dd, __le32 *rhf_addr)
1961 {
1962 u32 offset = ipath_hdrget_offset(rhf_addr);
1963
1964 return (struct ipath_message_header *)
1965 (rhf_addr - dd->ipath_rhf_offset + offset);
1966 }
1967
1968 static void ipath_7220_config_ports(struct ipath_devdata *dd, ushort cfgports)
1969 {
1970 u32 nchipports;
1971
1972 nchipports = ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
1973 if (!cfgports) {
1974 int ncpus = num_online_cpus();
1975
1976 if (ncpus <= 4)
1977 dd->ipath_portcnt = 5;
1978 else if (ncpus <= 8)
1979 dd->ipath_portcnt = 9;
1980 if (dd->ipath_portcnt)
1981 ipath_dbg("Auto-configured for %u ports, %d cpus "
1982 "online\n", dd->ipath_portcnt, ncpus);
1983 } else if (cfgports <= nchipports)
1984 dd->ipath_portcnt = cfgports;
1985 if (!dd->ipath_portcnt) /* none of the above, set to max */
1986 dd->ipath_portcnt = nchipports;
1987 /*
1988 * chip can be configured for 5, 9, or 17 ports, and choice
1989 * affects number of eager TIDs per port (1K, 2K, 4K).
1990 */
1991 if (dd->ipath_portcnt > 9)
1992 dd->ipath_rcvctrl |= 2ULL << IBA7220_R_PORTCFG_SHIFT;
1993 else if (dd->ipath_portcnt > 5)
1994 dd->ipath_rcvctrl |= 1ULL << IBA7220_R_PORTCFG_SHIFT;
1995 /* else configure for default 5 receive ports */
1996 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1997 dd->ipath_rcvctrl);
1998 dd->ipath_p0_rcvegrcnt = 2048; /* always */
1999 if (dd->ipath_flags & IPATH_HAS_SEND_DMA)
2000 dd->ipath_pioreserved = 3; /* kpiobufs used for PIO */
2001 }
2002
2003
2004 static int ipath_7220_get_ib_cfg(struct ipath_devdata *dd, int which)
2005 {
2006 int lsb, ret = 0;
2007 u64 maskr; /* right-justified mask */
2008
2009 switch (which) {
2010 case IPATH_IB_CFG_HRTBT: /* Get Heartbeat off/enable/auto */
2011 lsb = IBA7220_IBC_HRTBT_SHIFT;
2012 maskr = IBA7220_IBC_HRTBT_MASK;
2013 break;
2014
2015 case IPATH_IB_CFG_LWID_ENB: /* Get allowed Link-width */
2016 ret = dd->ipath_link_width_enabled;
2017 goto done;
2018
2019 case IPATH_IB_CFG_LWID: /* Get currently active Link-width */
2020 ret = dd->ipath_link_width_active;
2021 goto done;
2022
2023 case IPATH_IB_CFG_SPD_ENB: /* Get allowed Link speeds */
2024 ret = dd->ipath_link_speed_enabled;
2025 goto done;
2026
2027 case IPATH_IB_CFG_SPD: /* Get current Link spd */
2028 ret = dd->ipath_link_speed_active;
2029 goto done;
2030
2031 case IPATH_IB_CFG_RXPOL_ENB: /* Get Auto-RX-polarity enable */
2032 lsb = IBA7220_IBC_RXPOL_SHIFT;
2033 maskr = IBA7220_IBC_RXPOL_MASK;
2034 break;
2035
2036 case IPATH_IB_CFG_LREV_ENB: /* Get Auto-Lane-reversal enable */
2037 lsb = IBA7220_IBC_LREV_SHIFT;
2038 maskr = IBA7220_IBC_LREV_MASK;
2039 break;
2040
2041 case IPATH_IB_CFG_LINKLATENCY:
2042 ret = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcddrstatus)
2043 & IBA7220_DDRSTAT_LINKLAT_MASK;
2044 goto done;
2045
2046 default:
2047 ret = -ENOTSUPP;
2048 goto done;
2049 }
2050 ret = (int)((dd->ipath_ibcddrctrl >> lsb) & maskr);
2051 done:
2052 return ret;
2053 }
2054
2055 static int ipath_7220_set_ib_cfg(struct ipath_devdata *dd, int which, u32 val)
2056 {
2057 int lsb, ret = 0, setforce = 0;
2058 u64 maskr; /* right-justified mask */
2059
2060 switch (which) {
2061 case IPATH_IB_CFG_LIDLMC:
2062 /*
2063 * Set LID and LMC. Combined to avoid possible hazard
2064 * caller puts LMC in 16MSbits, DLID in 16LSbits of val
2065 */
2066 lsb = IBA7220_IBC_DLIDLMC_SHIFT;
2067 maskr = IBA7220_IBC_DLIDLMC_MASK;
2068 break;
2069
2070 case IPATH_IB_CFG_HRTBT: /* set Heartbeat off/enable/auto */
2071 if (val & IPATH_IB_HRTBT_ON &&
2072 (dd->ipath_flags & IPATH_NO_HRTBT))
2073 goto bail;
2074 lsb = IBA7220_IBC_HRTBT_SHIFT;
2075 maskr = IBA7220_IBC_HRTBT_MASK;
2076 break;
2077
2078 case IPATH_IB_CFG_LWID_ENB: /* set allowed Link-width */
2079 /*
2080 * As with speed, only write the actual register if
2081 * the link is currently down, otherwise takes effect
2082 * on next link change.
2083 */
2084 dd->ipath_link_width_enabled = val;
2085 if ((dd->ipath_flags & (IPATH_LINKDOWN|IPATH_LINKINIT)) !=
2086 IPATH_LINKDOWN)
2087 goto bail;
2088 /*
2089 * We set the IPATH_IB_FORCE_NOTIFY bit so updown
2090 * will get called because we want update
2091 * link_width_active, and the change may not take
2092 * effect for some time (if we are in POLL), so this
2093 * flag will force the updown routine to be called
2094 * on the next ibstatuschange down interrupt, even
2095 * if it's not an down->up transition.
2096 */
2097 val--; /* convert from IB to chip */
2098 maskr = IBA7220_IBC_WIDTH_MASK;
2099 lsb = IBA7220_IBC_WIDTH_SHIFT;
2100 setforce = 1;
2101 dd->ipath_flags |= IPATH_IB_FORCE_NOTIFY;
2102 break;
2103
2104 case IPATH_IB_CFG_SPD_ENB: /* set allowed Link speeds */
2105 /*
2106 * If we turn off IB1.2, need to preset SerDes defaults,
2107 * but not right now. Set a flag for the next time
2108 * we command the link down. As with width, only write the
2109 * actual register if the link is currently down, otherwise
2110 * takes effect on next link change. Since setting is being
2111 * explictly requested (via MAD or sysfs), clear autoneg
2112 * failure status if speed autoneg is enabled.
2113 */
2114 dd->ipath_link_speed_enabled = val;
2115 if (dd->ipath_ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK &&
2116 !(val & (val - 1)))
2117 dd->ipath_presets_needed = 1;
2118 if ((dd->ipath_flags & (IPATH_LINKDOWN|IPATH_LINKINIT)) !=
2119 IPATH_LINKDOWN)
2120 goto bail;
2121 /*
2122 * We set the IPATH_IB_FORCE_NOTIFY bit so updown
2123 * will get called because we want update
2124 * link_speed_active, and the change may not take
2125 * effect for some time (if we are in POLL), so this
2126 * flag will force the updown routine to be called
2127 * on the next ibstatuschange down interrupt, even
2128 * if it's not an down->up transition. When setting
2129 * speed autoneg, clear AUTONEG_FAILED.
2130 */
2131 if (val == (IPATH_IB_SDR | IPATH_IB_DDR)) {
2132 val = IBA7220_IBC_SPEED_AUTONEG_MASK |
2133 IBA7220_IBC_IBTA_1_2_MASK;
2134 dd->ipath_flags &= ~IPATH_IB_AUTONEG_FAILED;
2135 } else
2136 val = val == IPATH_IB_DDR ? IBA7220_IBC_SPEED_DDR
2137 : IBA7220_IBC_SPEED_SDR;
2138 maskr = IBA7220_IBC_SPEED_AUTONEG_MASK |
2139 IBA7220_IBC_IBTA_1_2_MASK;
2140 lsb = 0; /* speed bits are low bits */
2141 setforce = 1;
2142 break;
2143
2144 case IPATH_IB_CFG_RXPOL_ENB: /* set Auto-RX-polarity enable */
2145 lsb = IBA7220_IBC_RXPOL_SHIFT;
2146 maskr = IBA7220_IBC_RXPOL_MASK;
2147 break;
2148
2149 case IPATH_IB_CFG_LREV_ENB: /* set Auto-Lane-reversal enable */
2150 lsb = IBA7220_IBC_LREV_SHIFT;
2151 maskr = IBA7220_IBC_LREV_MASK;
2152 break;
2153
2154 default:
2155 ret = -ENOTSUPP;
2156 goto bail;
2157 }
2158 dd->ipath_ibcddrctrl &= ~(maskr << lsb);
2159 dd->ipath_ibcddrctrl |= (((u64) val & maskr) << lsb);
2160 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcddrctrl,
2161 dd->ipath_ibcddrctrl);
2162 if (setforce)
2163 dd->ipath_flags |= IPATH_IB_FORCE_NOTIFY;
2164 bail:
2165 return ret;
2166 }
2167
2168 static void ipath_7220_read_counters(struct ipath_devdata *dd,
2169 struct infinipath_counters *cntrs)
2170 {
2171 u64 *counters = (u64 *) cntrs;
2172 int i;
2173
2174 for (i = 0; i < sizeof(*cntrs) / sizeof(u64); i++)
2175 counters[i] = ipath_snap_cntr(dd, i);
2176 }
2177
2178 /* if we are using MSI, try to fallback to INTx */
2179 static int ipath_7220_intr_fallback(struct ipath_devdata *dd)
2180 {
2181 if (dd->ipath_msi_lo) {
2182 dev_info(&dd->pcidev->dev, "MSI interrupt not detected,"
2183 " trying INTx interrupts\n");
2184 ipath_7220_nomsi(dd);
2185 ipath_enable_intx(dd->pcidev);
2186 /*
2187 * some newer kernels require free_irq before disable_msi,
2188 * and irq can be changed during disable and intx enable
2189 * and we need to therefore use the pcidev->irq value,
2190 * not our saved MSI value.
2191 */
2192 dd->ipath_irq = dd->pcidev->irq;
2193 if (request_irq(dd->ipath_irq, ipath_intr, IRQF_SHARED,
2194 IPATH_DRV_NAME, dd))
2195 ipath_dev_err(dd,
2196 "Could not re-request_irq for INTx\n");
2197 return 1;
2198 }
2199 return 0;
2200 }
2201
2202 /*
2203 * reset the XGXS (between serdes and IBC). Slightly less intrusive
2204 * than resetting the IBC or external link state, and useful in some
2205 * cases to cause some retraining. To do this right, we reset IBC
2206 * as well.
2207 */
2208 static void ipath_7220_xgxs_reset(struct ipath_devdata *dd)
2209 {
2210 u64 val, prev_val;
2211
2212 prev_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
2213 val = prev_val | INFINIPATH_XGXS_RESET;
2214 prev_val &= ~INFINIPATH_XGXS_RESET; /* be sure */
2215 ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
2216 dd->ipath_control & ~INFINIPATH_C_LINKENABLE);
2217 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
2218 ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
2219 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, prev_val);
2220 ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
2221 dd->ipath_control);
2222 }
2223
2224
2225 /* Still needs cleanup, too much hardwired stuff */
2226 static void autoneg_send(struct ipath_devdata *dd,
2227 u32 *hdr, u32 dcnt, u32 *data)
2228 {
2229 int i;
2230 u64 cnt;
2231 u32 __iomem *piobuf;
2232 u32 pnum;
2233
2234 i = 0;
2235 cnt = 7 + dcnt + 1; /* 7 dword header, dword data, icrc */
2236 while (!(piobuf = ipath_getpiobuf(dd, cnt, &pnum))) {
2237 if (i++ > 15) {
2238 ipath_dbg("Couldn't get pio buffer for send\n");
2239 return;
2240 }
2241 udelay(2);
2242 }
2243 if (dd->ipath_flags&IPATH_HAS_PBC_CNT)
2244 cnt |= 0x80000000UL<<32; /* mark as VL15 */
2245 writeq(cnt, piobuf);
2246 ipath_flush_wc();
2247 __iowrite32_copy(piobuf + 2, hdr, 7);
2248 __iowrite32_copy(piobuf + 9, data, dcnt);
2249 ipath_flush_wc();
2250 }
2251
2252 /*
2253 * _start packet gets sent twice at start, _done gets sent twice at end
2254 */
2255 static void ipath_autoneg_send(struct ipath_devdata *dd, int which)
2256 {
2257 static u32 swapped;
2258 u32 dw, i, hcnt, dcnt, *data;
2259 static u32 hdr[7] = { 0xf002ffff, 0x48ffff, 0x6400abba };
2260 static u32 madpayload_start[0x40] = {
2261 0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
2262 0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
2263 0x1, 0x1388, 0x15e, 0x1, /* rest 0's */
2264 };
2265 static u32 madpayload_done[0x40] = {
2266 0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
2267 0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
2268 0x40000001, 0x1388, 0x15e, /* rest 0's */
2269 };
2270 dcnt = ARRAY_SIZE(madpayload_start);
2271 hcnt = ARRAY_SIZE(hdr);
2272 if (!swapped) {
2273 /* for maintainability, do it at runtime */
2274 for (i = 0; i < hcnt; i++) {
2275 dw = (__force u32) cpu_to_be32(hdr[i]);
2276 hdr[i] = dw;
2277 }
2278 for (i = 0; i < dcnt; i++) {
2279 dw = (__force u32) cpu_to_be32(madpayload_start[i]);
2280 madpayload_start[i] = dw;
2281 dw = (__force u32) cpu_to_be32(madpayload_done[i]);
2282 madpayload_done[i] = dw;
2283 }
2284 swapped = 1;
2285 }
2286
2287 data = which ? madpayload_done : madpayload_start;
2288 ipath_cdbg(PKT, "Sending %s special MADs\n", which?"done":"start");
2289
2290 autoneg_send(dd, hdr, dcnt, data);
2291 ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
2292 udelay(2);
2293 autoneg_send(dd, hdr, dcnt, data);
2294 ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
2295 udelay(2);
2296 }
2297
2298
2299
2300 /*
2301 * Do the absolute minimum to cause an IB speed change, and make it
2302 * ready, but don't actually trigger the change. The caller will
2303 * do that when ready (if link is in Polling training state, it will
2304 * happen immediately, otherwise when link next goes down)
2305 *
2306 * This routine should only be used as part of the DDR autonegotation
2307 * code for devices that are not compliant with IB 1.2 (or code that
2308 * fixes things up for same).
2309 *
2310 * When link has gone down, and autoneg enabled, or autoneg has
2311 * failed and we give up until next time we set both speeds, and
2312 * then we want IBTA enabled as well as "use max enabled speed.
2313 */
2314 static void set_speed_fast(struct ipath_devdata *dd, u32 speed)
2315 {
2316 dd->ipath_ibcddrctrl &= ~(IBA7220_IBC_SPEED_AUTONEG_MASK |
2317 IBA7220_IBC_IBTA_1_2_MASK |
2318 (IBA7220_IBC_WIDTH_MASK << IBA7220_IBC_WIDTH_SHIFT));
2319
2320 if (speed == (IPATH_IB_SDR | IPATH_IB_DDR))
2321 dd->ipath_ibcddrctrl |= IBA7220_IBC_SPEED_AUTONEG_MASK |
2322 IBA7220_IBC_IBTA_1_2_MASK;
2323 else
2324 dd->ipath_ibcddrctrl |= speed == IPATH_IB_DDR ?
2325 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
2326
2327 /*
2328 * Convert from IB-style 1 = 1x, 2 = 4x, 3 = auto
2329 * to chip-centric 0 = 1x, 1 = 4x, 2 = auto
2330 */
2331 dd->ipath_ibcddrctrl |= (u64)(dd->ipath_link_width_enabled - 1) <<
2332 IBA7220_IBC_WIDTH_SHIFT;
2333 ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcddrctrl,
2334 dd->ipath_ibcddrctrl);
2335 ipath_cdbg(VERBOSE, "setup for IB speed (%x) done\n", speed);
2336 }
2337
2338
2339 /*
2340 * this routine is only used when we are not talking to another
2341 * IB 1.2-compliant device that we think can do DDR.
2342 * (This includes all existing switch chips as of Oct 2007.)
2343 * 1.2-compliant devices go directly to DDR prior to reaching INIT
2344 */
2345 static void try_auto_neg(struct ipath_devdata *dd)
2346 {
2347 /*
2348 * required for older non-IB1.2 DDR switches. Newer
2349 * non-IB-compliant switches don't need it, but so far,
2350 * aren't bothered by it either. "Magic constant"
2351 */
2352 ipath_write_kreg(dd, IPATH_KREG_OFFSET(IBNCModeCtrl),
2353 0x3b9dc07);
2354 dd->ipath_flags |= IPATH_IB_AUTONEG_INPROG;
2355 ipath_autoneg_send(dd, 0);
2356 set_speed_fast(dd, IPATH_IB_DDR);
2357 ipath_toggle_rclkrls(dd);
2358 /* 2 msec is minimum length of a poll cycle */
2359 schedule_delayed_work(&dd->ipath_autoneg_work,
2360 msecs_to_jiffies(2));
2361 }
2362
2363
2364 static int ipath_7220_ib_updown(struct ipath_devdata *dd, int ibup, u64 ibcs)
2365 {
2366 int ret = 0, symadj = 0;
2367 u32 ltstate = ipath_ib_linkstate(dd, ibcs);
2368
2369 dd->ipath_link_width_active =
2370 ((ibcs >> IBA7220_IBCS_LINKWIDTH_SHIFT) & 1) ?
2371 IB_WIDTH_4X : IB_WIDTH_1X;
2372 dd->ipath_link_speed_active =
2373 ((ibcs >> IBA7220_IBCS_LINKSPEED_SHIFT) & 1) ?
2374 IPATH_IB_DDR : IPATH_IB_SDR;
2375
2376 if (!ibup) {
2377 /*
2378 * when link goes down we don't want aeq running, so it
2379 * won't't interfere with IBC training, etc., and we need
2380 * to go back to the static SerDes preset values
2381 */
2382 if (dd->ipath_x1_fix_tries &&
2383 ltstate <= INFINIPATH_IBCS_LT_STATE_SLEEPQUIET &&
2384 ltstate != INFINIPATH_IBCS_LT_STATE_LINKUP)
2385 dd->ipath_x1_fix_tries = 0;
2386 if (!(dd->ipath_flags & (IPATH_IB_AUTONEG_FAILED |
2387 IPATH_IB_AUTONEG_INPROG)))
2388 set_speed_fast(dd, dd->ipath_link_speed_enabled);
2389 if (!(dd->ipath_flags & IPATH_IB_AUTONEG_INPROG)) {
2390 ipath_cdbg(VERBOSE, "Setting RXEQ defaults\n");
2391 ipath_sd7220_presets(dd);
2392 }
2393 /* this might better in ipath_sd7220_presets() */
2394 ipath_set_relock_poll(dd, ibup);
2395 } else {
2396 if (ipath_compat_ddr_negotiate &&
2397 !(dd->ipath_flags & (IPATH_IB_AUTONEG_FAILED |
2398 IPATH_IB_AUTONEG_INPROG)) &&
2399 dd->ipath_link_speed_active == IPATH_IB_SDR &&
2400 (dd->ipath_link_speed_enabled &
2401 (IPATH_IB_DDR | IPATH_IB_SDR)) ==
2402 (IPATH_IB_DDR | IPATH_IB_SDR) &&
2403 dd->ipath_autoneg_tries < IPATH_AUTONEG_TRIES) {
2404 /* we are SDR, and DDR auto-negotiation enabled */
2405 ++dd->ipath_autoneg_tries;
2406 ipath_dbg("DDR negotiation try, %u/%u\n",
2407 dd->ipath_autoneg_tries,
2408 IPATH_AUTONEG_TRIES);
2409 if (!dd->ibdeltainprog) {
2410 dd->ibdeltainprog = 1;
2411 dd->ibsymsnap = ipath_read_creg32(dd,
2412 dd->ipath_cregs->cr_ibsymbolerrcnt);
2413 dd->iblnkerrsnap = ipath_read_creg32(dd,
2414 dd->ipath_cregs->cr_iblinkerrrecovcnt);
2415 }
2416 try_auto_neg(dd);
2417 ret = 1; /* no other IB status change processing */
2418 } else if ((dd->ipath_flags & IPATH_IB_AUTONEG_INPROG)
2419 && dd->ipath_link_speed_active == IPATH_IB_SDR) {
2420 ipath_autoneg_send(dd, 1);
2421 set_speed_fast(dd, IPATH_IB_DDR);
2422 udelay(2);
2423 ipath_toggle_rclkrls(dd);
2424 ret = 1; /* no other IB status change processing */
2425 } else {
2426 if ((dd->ipath_flags & IPATH_IB_AUTONEG_INPROG) &&
2427 (dd->ipath_link_speed_active & IPATH_IB_DDR)) {
2428 ipath_dbg("Got to INIT with DDR autoneg\n");
2429 dd->ipath_flags &= ~(IPATH_IB_AUTONEG_INPROG
2430 | IPATH_IB_AUTONEG_FAILED);
2431 dd->ipath_autoneg_tries = 0;
2432 /* re-enable SDR, for next link down */
2433 set_speed_fast(dd,
2434 dd->ipath_link_speed_enabled);
2435 wake_up(&dd->ipath_autoneg_wait);
2436 symadj = 1;
2437 } else if (dd->ipath_flags & IPATH_IB_AUTONEG_FAILED) {
2438 /*
2439 * clear autoneg failure flag, and do setup
2440 * so we'll try next time link goes down and
2441 * back to INIT (possibly connected to different
2442 * device).
2443 */
2444 ipath_dbg("INIT %sDR after autoneg failure\n",
2445 (dd->ipath_link_speed_active &
2446 IPATH_IB_DDR) ? "D" : "S");
2447 dd->ipath_flags &= ~IPATH_IB_AUTONEG_FAILED;
2448 dd->ipath_ibcddrctrl |=
2449 IBA7220_IBC_IBTA_1_2_MASK;
2450 ipath_write_kreg(dd,
2451 IPATH_KREG_OFFSET(IBNCModeCtrl), 0);
2452 symadj = 1;
2453 }
2454 }
2455 /*
2456 * if we are in 1X on rev1 only, and are in autoneg width,
2457 * it could be due to an xgxs problem, so if we haven't
2458 * already tried, try twice to get to 4X; if we
2459 * tried, and couldn't, report it, since it will
2460 * probably not be what is desired.
2461 */
2462 if (dd->ipath_minrev == 1 &&
2463 (dd->ipath_link_width_enabled & (IB_WIDTH_1X |
2464 IB_WIDTH_4X)) == (IB_WIDTH_1X | IB_WIDTH_4X)
2465 && dd->ipath_link_width_active == IB_WIDTH_1X
2466 && dd->ipath_x1_fix_tries < 3) {
2467 if (++dd->ipath_x1_fix_tries == 3) {
2468 dev_info(&dd->pcidev->dev,
2469 "IB link is in 1X mode\n");
2470 if (!(dd->ipath_flags &
2471 IPATH_IB_AUTONEG_INPROG))
2472 symadj = 1;
2473 }
2474 else {
2475 ipath_cdbg(VERBOSE, "IB 1X in "
2476 "auto-width, try %u to be "
2477 "sure it's really 1X; "
2478 "ltstate %u\n",
2479 dd->ipath_x1_fix_tries,
2480 ltstate);
2481 dd->ipath_f_xgxs_reset(dd);
2482 ret = 1; /* skip other processing */
2483 }
2484 } else if (!(dd->ipath_flags & IPATH_IB_AUTONEG_INPROG))
2485 symadj = 1;
2486
2487 if (!ret) {
2488 dd->delay_mult = rate_to_delay
2489 [(ibcs >> IBA7220_IBCS_LINKSPEED_SHIFT) & 1]
2490 [(ibcs >> IBA7220_IBCS_LINKWIDTH_SHIFT) & 1];
2491
2492 ipath_set_relock_poll(dd, ibup);
2493 }
2494 }
2495
2496 if (symadj) {
2497 if (dd->ibdeltainprog) {
2498 dd->ibdeltainprog = 0;
2499 dd->ibsymdelta += ipath_read_creg32(dd,
2500 dd->ipath_cregs->cr_ibsymbolerrcnt) -
2501 dd->ibsymsnap;
2502 dd->iblnkerrdelta += ipath_read_creg32(dd,
2503 dd->ipath_cregs->cr_iblinkerrrecovcnt) -
2504 dd->iblnkerrsnap;
2505 }
2506 } else if (!ibup && !dd->ibdeltainprog
2507 && !(dd->ipath_flags & IPATH_IB_AUTONEG_INPROG)) {
2508 dd->ibdeltainprog = 1;
2509 dd->ibsymsnap = ipath_read_creg32(dd,
2510 dd->ipath_cregs->cr_ibsymbolerrcnt);
2511 dd->iblnkerrsnap = ipath_read_creg32(dd,
2512 dd->ipath_cregs->cr_iblinkerrrecovcnt);
2513 }
2514
2515 if (!ret)
2516 ipath_setup_7220_setextled(dd, ipath_ib_linkstate(dd, ibcs),
2517 ltstate);
2518 return ret;
2519 }
2520
2521
2522 /*
2523 * Handle the empirically determined mechanism for auto-negotiation
2524 * of DDR speed with switches.
2525 */
2526 static void autoneg_work(struct work_struct *work)
2527 {
2528 struct ipath_devdata *dd;
2529 u64 startms;
2530 u32 lastlts, i;
2531
2532 dd = container_of(work, struct ipath_devdata,
2533 ipath_autoneg_work.work);
2534
2535 startms = jiffies_to_msecs(jiffies);
2536
2537 /*
2538 * busy wait for this first part, it should be at most a
2539 * few hundred usec, since we scheduled ourselves for 2msec.
2540 */
2541 for (i = 0; i < 25; i++) {
2542 lastlts = ipath_ib_linktrstate(dd, dd->ipath_lastibcstat);
2543 if (lastlts == INFINIPATH_IBCS_LT_STATE_POLLQUIET) {
2544 ipath_set_linkstate(dd, IPATH_IB_LINKDOWN_DISABLE);
2545 break;
2546 }
2547 udelay(100);
2548 }
2549
2550 if (!(dd->ipath_flags & IPATH_IB_AUTONEG_INPROG))
2551 goto done; /* we got there early or told to stop */
2552
2553 /* we expect this to timeout */
2554 if (wait_event_timeout(dd->ipath_autoneg_wait,
2555 !(dd->ipath_flags & IPATH_IB_AUTONEG_INPROG),
2556 msecs_to_jiffies(90)))
2557 goto done;
2558
2559 ipath_toggle_rclkrls(dd);
2560
2561 /* we expect this to timeout */
2562 if (wait_event_timeout(dd->ipath_autoneg_wait,
2563 !(dd->ipath_flags & IPATH_IB_AUTONEG_INPROG),
2564 msecs_to_jiffies(1700)))
2565 goto done;
2566
2567 set_speed_fast(dd, IPATH_IB_SDR);
2568 ipath_toggle_rclkrls(dd);
2569
2570 /*
2571 * wait up to 250 msec for link to train and get to INIT at DDR;
2572 * this should terminate early
2573 */
2574 wait_event_timeout(dd->ipath_autoneg_wait,
2575 !(dd->ipath_flags & IPATH_IB_AUTONEG_INPROG),
2576 msecs_to_jiffies(250));
2577 done:
2578 if (dd->ipath_flags & IPATH_IB_AUTONEG_INPROG) {
2579 ipath_dbg("Did not get to DDR INIT (%x) after %Lu msecs\n",
2580 ipath_ib_state(dd, dd->ipath_lastibcstat),
2581 (unsigned long long) jiffies_to_msecs(jiffies)-startms);
2582 dd->ipath_flags &= ~IPATH_IB_AUTONEG_INPROG;
2583 if (dd->ipath_autoneg_tries == IPATH_AUTONEG_TRIES) {
2584 dd->ipath_flags |= IPATH_IB_AUTONEG_FAILED;
2585 ipath_dbg("Giving up on DDR until next IB "
2586 "link Down\n");
2587 dd->ipath_autoneg_tries = 0;
2588 }
2589 set_speed_fast(dd, dd->ipath_link_speed_enabled);
2590 }
2591 }
2592
2593
2594 /**
2595 * ipath_init_iba7220_funcs - set up the chip-specific function pointers
2596 * @dd: the infinipath device
2597 *
2598 * This is global, and is called directly at init to set up the
2599 * chip-specific function pointers for later use.
2600 */
2601 void ipath_init_iba7220_funcs(struct ipath_devdata *dd)
2602 {
2603 dd->ipath_f_intrsetup = ipath_7220_intconfig;
2604 dd->ipath_f_bus = ipath_setup_7220_config;
2605 dd->ipath_f_reset = ipath_setup_7220_reset;
2606 dd->ipath_f_get_boardname = ipath_7220_boardname;
2607 dd->ipath_f_init_hwerrors = ipath_7220_init_hwerrors;
2608 dd->ipath_f_early_init = ipath_7220_early_init;
2609 dd->ipath_f_handle_hwerrors = ipath_7220_handle_hwerrors;
2610 dd->ipath_f_quiet_serdes = ipath_7220_quiet_serdes;
2611 dd->ipath_f_bringup_serdes = ipath_7220_bringup_serdes;
2612 dd->ipath_f_clear_tids = ipath_7220_clear_tids;
2613 dd->ipath_f_put_tid = ipath_7220_put_tid;
2614 dd->ipath_f_cleanup = ipath_setup_7220_cleanup;
2615 dd->ipath_f_setextled = ipath_setup_7220_setextled;
2616 dd->ipath_f_get_base_info = ipath_7220_get_base_info;
2617 dd->ipath_f_free_irq = ipath_7220_free_irq;
2618 dd->ipath_f_tidtemplate = ipath_7220_tidtemplate;
2619 dd->ipath_f_intr_fallback = ipath_7220_intr_fallback;
2620 dd->ipath_f_xgxs_reset = ipath_7220_xgxs_reset;
2621 dd->ipath_f_get_ib_cfg = ipath_7220_get_ib_cfg;
2622 dd->ipath_f_set_ib_cfg = ipath_7220_set_ib_cfg;
2623 dd->ipath_f_config_jint = ipath_7220_config_jint;
2624 dd->ipath_f_config_ports = ipath_7220_config_ports;
2625 dd->ipath_f_read_counters = ipath_7220_read_counters;
2626 dd->ipath_f_get_msgheader = ipath_7220_get_msgheader;
2627 dd->ipath_f_ib_updown = ipath_7220_ib_updown;
2628
2629 /* initialize chip-specific variables */
2630 ipath_init_7220_variables(dd);
2631 }
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