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IB/qib: Fix a possible data corruption when receiving packets
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / infiniband / hw / qib / qib_iba7220.c
blob759bb63bb3b823a663ee9ecac1a02bb97ee64db6
1 /*
2 * Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
3 * All rights reserved.
4 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34 /*
35 * This file contains all of the code that is specific to the
36 * QLogic_IB 7220 chip (except that specific to the SerDes)
37 */
38
39 #include <linux/interrupt.h>
40 #include <linux/pci.h>
41 #include <linux/delay.h>
42 #include <linux/io.h>
43 #include <rdma/ib_verbs.h>
44
45 #include "qib.h"
46 #include "qib_7220.h"
47
48 static void qib_setup_7220_setextled(struct qib_pportdata *, u32);
49 static void qib_7220_handle_hwerrors(struct qib_devdata *, char *, size_t);
50 static void sendctrl_7220_mod(struct qib_pportdata *ppd, u32 op);
51 static u32 qib_7220_iblink_state(u64);
52 static u8 qib_7220_phys_portstate(u64);
53 static void qib_sdma_update_7220_tail(struct qib_pportdata *, u16);
54 static void qib_set_ib_7220_lstate(struct qib_pportdata *, u16, u16);
55
56 /*
57 * This file contains almost all the chip-specific register information and
58 * access functions for the QLogic QLogic_IB 7220 PCI-Express chip, with the
59 * exception of SerDes support, which in in qib_sd7220.c.
60 */
61
62 /* Below uses machine-generated qib_chipnum_regs.h file */
63 #define KREG_IDX(regname) (QIB_7220_##regname##_OFFS / sizeof(u64))
64
65 /* Use defines to tie machine-generated names to lower-case names */
66 #define kr_control KREG_IDX(Control)
67 #define kr_counterregbase KREG_IDX(CntrRegBase)
68 #define kr_errclear KREG_IDX(ErrClear)
69 #define kr_errmask KREG_IDX(ErrMask)
70 #define kr_errstatus KREG_IDX(ErrStatus)
71 #define kr_extctrl KREG_IDX(EXTCtrl)
72 #define kr_extstatus KREG_IDX(EXTStatus)
73 #define kr_gpio_clear KREG_IDX(GPIOClear)
74 #define kr_gpio_mask KREG_IDX(GPIOMask)
75 #define kr_gpio_out KREG_IDX(GPIOOut)
76 #define kr_gpio_status KREG_IDX(GPIOStatus)
77 #define kr_hrtbt_guid KREG_IDX(HRTBT_GUID)
78 #define kr_hwdiagctrl KREG_IDX(HwDiagCtrl)
79 #define kr_hwerrclear KREG_IDX(HwErrClear)
80 #define kr_hwerrmask KREG_IDX(HwErrMask)
81 #define kr_hwerrstatus KREG_IDX(HwErrStatus)
82 #define kr_ibcctrl KREG_IDX(IBCCtrl)
83 #define kr_ibcddrctrl KREG_IDX(IBCDDRCtrl)
84 #define kr_ibcddrstatus KREG_IDX(IBCDDRStatus)
85 #define kr_ibcstatus KREG_IDX(IBCStatus)
86 #define kr_ibserdesctrl KREG_IDX(IBSerDesCtrl)
87 #define kr_intclear KREG_IDX(IntClear)
88 #define kr_intmask KREG_IDX(IntMask)
89 #define kr_intstatus KREG_IDX(IntStatus)
90 #define kr_ncmodectrl KREG_IDX(IBNCModeCtrl)
91 #define kr_palign KREG_IDX(PageAlign)
92 #define kr_partitionkey KREG_IDX(RcvPartitionKey)
93 #define kr_portcnt KREG_IDX(PortCnt)
94 #define kr_rcvbthqp KREG_IDX(RcvBTHQP)
95 #define kr_rcvctrl KREG_IDX(RcvCtrl)
96 #define kr_rcvegrbase KREG_IDX(RcvEgrBase)
97 #define kr_rcvegrcnt KREG_IDX(RcvEgrCnt)
98 #define kr_rcvhdrcnt KREG_IDX(RcvHdrCnt)
99 #define kr_rcvhdrentsize KREG_IDX(RcvHdrEntSize)
100 #define kr_rcvhdrsize KREG_IDX(RcvHdrSize)
101 #define kr_rcvpktledcnt KREG_IDX(RcvPktLEDCnt)
102 #define kr_rcvtidbase KREG_IDX(RcvTIDBase)
103 #define kr_rcvtidcnt KREG_IDX(RcvTIDCnt)
104 #define kr_revision KREG_IDX(Revision)
105 #define kr_scratch KREG_IDX(Scratch)
106 #define kr_sendbuffererror KREG_IDX(SendBufErr0)
107 #define kr_sendctrl KREG_IDX(SendCtrl)
108 #define kr_senddmabase KREG_IDX(SendDmaBase)
109 #define kr_senddmabufmask0 KREG_IDX(SendDmaBufMask0)
110 #define kr_senddmabufmask1 (KREG_IDX(SendDmaBufMask0) + 1)
111 #define kr_senddmabufmask2 (KREG_IDX(SendDmaBufMask0) + 2)
112 #define kr_senddmahead KREG_IDX(SendDmaHead)
113 #define kr_senddmaheadaddr KREG_IDX(SendDmaHeadAddr)
114 #define kr_senddmalengen KREG_IDX(SendDmaLenGen)
115 #define kr_senddmastatus KREG_IDX(SendDmaStatus)
116 #define kr_senddmatail KREG_IDX(SendDmaTail)
117 #define kr_sendpioavailaddr KREG_IDX(SendBufAvailAddr)
118 #define kr_sendpiobufbase KREG_IDX(SendBufBase)
119 #define kr_sendpiobufcnt KREG_IDX(SendBufCnt)
120 #define kr_sendpiosize KREG_IDX(SendBufSize)
121 #define kr_sendregbase KREG_IDX(SendRegBase)
122 #define kr_userregbase KREG_IDX(UserRegBase)
123 #define kr_xgxs_cfg KREG_IDX(XGXSCfg)
124
125 /* These must only be written via qib_write_kreg_ctxt() */
126 #define kr_rcvhdraddr KREG_IDX(RcvHdrAddr0)
127 #define kr_rcvhdrtailaddr KREG_IDX(RcvHdrTailAddr0)
128
129
130 #define CREG_IDX(regname) ((QIB_7220_##regname##_OFFS - \
131 QIB_7220_LBIntCnt_OFFS) / sizeof(u64))
132
133 #define cr_badformat CREG_IDX(RxVersionErrCnt)
134 #define cr_erricrc CREG_IDX(RxICRCErrCnt)
135 #define cr_errlink CREG_IDX(RxLinkMalformCnt)
136 #define cr_errlpcrc CREG_IDX(RxLPCRCErrCnt)
137 #define cr_errpkey CREG_IDX(RxPKeyMismatchCnt)
138 #define cr_rcvflowctrl_err CREG_IDX(RxFlowCtrlViolCnt)
139 #define cr_err_rlen CREG_IDX(RxLenErrCnt)
140 #define cr_errslen CREG_IDX(TxLenErrCnt)
141 #define cr_errtidfull CREG_IDX(RxTIDFullErrCnt)
142 #define cr_errtidvalid CREG_IDX(RxTIDValidErrCnt)
143 #define cr_errvcrc CREG_IDX(RxVCRCErrCnt)
144 #define cr_ibstatuschange CREG_IDX(IBStatusChangeCnt)
145 #define cr_lbint CREG_IDX(LBIntCnt)
146 #define cr_invalidrlen CREG_IDX(RxMaxMinLenErrCnt)
147 #define cr_invalidslen CREG_IDX(TxMaxMinLenErrCnt)
148 #define cr_lbflowstall CREG_IDX(LBFlowStallCnt)
149 #define cr_pktrcv CREG_IDX(RxDataPktCnt)
150 #define cr_pktrcvflowctrl CREG_IDX(RxFlowPktCnt)
151 #define cr_pktsend CREG_IDX(TxDataPktCnt)
152 #define cr_pktsendflow CREG_IDX(TxFlowPktCnt)
153 #define cr_portovfl CREG_IDX(RxP0HdrEgrOvflCnt)
154 #define cr_rcvebp CREG_IDX(RxEBPCnt)
155 #define cr_rcvovfl CREG_IDX(RxBufOvflCnt)
156 #define cr_senddropped CREG_IDX(TxDroppedPktCnt)
157 #define cr_sendstall CREG_IDX(TxFlowStallCnt)
158 #define cr_sendunderrun CREG_IDX(TxUnderrunCnt)
159 #define cr_wordrcv CREG_IDX(RxDwordCnt)
160 #define cr_wordsend CREG_IDX(TxDwordCnt)
161 #define cr_txunsupvl CREG_IDX(TxUnsupVLErrCnt)
162 #define cr_rxdroppkt CREG_IDX(RxDroppedPktCnt)
163 #define cr_iblinkerrrecov CREG_IDX(IBLinkErrRecoveryCnt)
164 #define cr_iblinkdown CREG_IDX(IBLinkDownedCnt)
165 #define cr_ibsymbolerr CREG_IDX(IBSymbolErrCnt)
166 #define cr_vl15droppedpkt CREG_IDX(RxVL15DroppedPktCnt)
167 #define cr_rxotherlocalphyerr CREG_IDX(RxOtherLocalPhyErrCnt)
168 #define cr_excessbufferovfl CREG_IDX(ExcessBufferOvflCnt)
169 #define cr_locallinkintegrityerr CREG_IDX(LocalLinkIntegrityErrCnt)
170 #define cr_rxvlerr CREG_IDX(RxVlErrCnt)
171 #define cr_rxdlidfltr CREG_IDX(RxDlidFltrCnt)
172 #define cr_psstat CREG_IDX(PSStat)
173 #define cr_psstart CREG_IDX(PSStart)
174 #define cr_psinterval CREG_IDX(PSInterval)
175 #define cr_psrcvdatacount CREG_IDX(PSRcvDataCount)
176 #define cr_psrcvpktscount CREG_IDX(PSRcvPktsCount)
177 #define cr_psxmitdatacount CREG_IDX(PSXmitDataCount)
178 #define cr_psxmitpktscount CREG_IDX(PSXmitPktsCount)
179 #define cr_psxmitwaitcount CREG_IDX(PSXmitWaitCount)
180 #define cr_txsdmadesc CREG_IDX(TxSDmaDescCnt)
181 #define cr_pcieretrydiag CREG_IDX(PcieRetryBufDiagQwordCnt)
182
183 #define SYM_RMASK(regname, fldname) ((u64) \
184 QIB_7220_##regname##_##fldname##_RMASK)
185 #define SYM_MASK(regname, fldname) ((u64) \
186 QIB_7220_##regname##_##fldname##_RMASK << \
187 QIB_7220_##regname##_##fldname##_LSB)
188 #define SYM_LSB(regname, fldname) (QIB_7220_##regname##_##fldname##_LSB)
189 #define SYM_FIELD(value, regname, fldname) ((u64) \
190 (((value) >> SYM_LSB(regname, fldname)) & \
191 SYM_RMASK(regname, fldname)))
192 #define ERR_MASK(fldname) SYM_MASK(ErrMask, fldname##Mask)
193 #define HWE_MASK(fldname) SYM_MASK(HwErrMask, fldname##Mask)
194
195 /* ibcctrl bits */
196 #define QLOGIC_IB_IBCC_LINKINITCMD_DISABLE 1
197 /* cycle through TS1/TS2 till OK */
198 #define QLOGIC_IB_IBCC_LINKINITCMD_POLL 2
199 /* wait for TS1, then go on */
200 #define QLOGIC_IB_IBCC_LINKINITCMD_SLEEP 3
201 #define QLOGIC_IB_IBCC_LINKINITCMD_SHIFT 16
202
203 #define QLOGIC_IB_IBCC_LINKCMD_DOWN 1 /* move to 0x11 */
204 #define QLOGIC_IB_IBCC_LINKCMD_ARMED 2 /* move to 0x21 */
205 #define QLOGIC_IB_IBCC_LINKCMD_ACTIVE 3 /* move to 0x31 */
206
207 #define BLOB_7220_IBCHG 0x81
208
209 /*
210 * We could have a single register get/put routine, that takes a group type,
211 * but this is somewhat clearer and cleaner. It also gives us some error
212 * checking. 64 bit register reads should always work, but are inefficient
213 * on opteron (the northbridge always generates 2 separate HT 32 bit reads),
214 * so we use kreg32 wherever possible. User register and counter register
215 * reads are always 32 bit reads, so only one form of those routines.
216 */
217
218 /**
219 * qib_read_ureg32 - read 32-bit virtualized per-context register
220 * @dd: device
221 * @regno: register number
222 * @ctxt: context number
223 *
224 * Return the contents of a register that is virtualized to be per context.
225 * Returns -1 on errors (not distinguishable from valid contents at
226 * runtime; we may add a separate error variable at some point).
227 */
228 static inline u32 qib_read_ureg32(const struct qib_devdata *dd,
229 enum qib_ureg regno, int ctxt)
230 {
231 if (!dd->kregbase || !(dd->flags & QIB_PRESENT))
232 return 0;
233
234 if (dd->userbase)
235 return readl(regno + (u64 __iomem *)
236 ((char __iomem *)dd->userbase +
237 dd->ureg_align * ctxt));
238 else
239 return readl(regno + (u64 __iomem *)
240 (dd->uregbase +
241 (char __iomem *)dd->kregbase +
242 dd->ureg_align * ctxt));
243 }
244
245 /**
246 * qib_write_ureg - write 32-bit virtualized per-context register
247 * @dd: device
248 * @regno: register number
249 * @value: value
250 * @ctxt: context
251 *
252 * Write the contents of a register that is virtualized to be per context.
253 */
254 static inline void qib_write_ureg(const struct qib_devdata *dd,
255 enum qib_ureg regno, u64 value, int ctxt)
256 {
257 u64 __iomem *ubase;
258
259 if (dd->userbase)
260 ubase = (u64 __iomem *)
261 ((char __iomem *) dd->userbase +
262 dd->ureg_align * ctxt);
263 else
264 ubase = (u64 __iomem *)
265 (dd->uregbase +
266 (char __iomem *) dd->kregbase +
267 dd->ureg_align * ctxt);
268
269 if (dd->kregbase && (dd->flags & QIB_PRESENT))
270 writeq(value, &ubase[regno]);
271 }
272
273 /**
274 * qib_write_kreg_ctxt - write a device's per-ctxt 64-bit kernel register
275 * @dd: the qlogic_ib device
276 * @regno: the register number to write
277 * @ctxt: the context containing the register
278 * @value: the value to write
279 */
280 static inline void qib_write_kreg_ctxt(const struct qib_devdata *dd,
281 const u16 regno, unsigned ctxt,
282 u64 value)
283 {
284 qib_write_kreg(dd, regno + ctxt, value);
285 }
286
287 static inline void write_7220_creg(const struct qib_devdata *dd,
288 u16 regno, u64 value)
289 {
290 if (dd->cspec->cregbase && (dd->flags & QIB_PRESENT))
291 writeq(value, &dd->cspec->cregbase[regno]);
292 }
293
294 static inline u64 read_7220_creg(const struct qib_devdata *dd, u16 regno)
295 {
296 if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
297 return 0;
298 return readq(&dd->cspec->cregbase[regno]);
299 }
300
301 static inline u32 read_7220_creg32(const struct qib_devdata *dd, u16 regno)
302 {
303 if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
304 return 0;
305 return readl(&dd->cspec->cregbase[regno]);
306 }
307
308 /* kr_revision bits */
309 #define QLOGIC_IB_R_EMULATORREV_MASK ((1ULL << 22) - 1)
310 #define QLOGIC_IB_R_EMULATORREV_SHIFT 40
311
312 /* kr_control bits */
313 #define QLOGIC_IB_C_RESET (1U << 7)
314
315 /* kr_intstatus, kr_intclear, kr_intmask bits */
316 #define QLOGIC_IB_I_RCVURG_MASK ((1ULL << 17) - 1)
317 #define QLOGIC_IB_I_RCVURG_SHIFT 32
318 #define QLOGIC_IB_I_RCVAVAIL_MASK ((1ULL << 17) - 1)
319 #define QLOGIC_IB_I_RCVAVAIL_SHIFT 0
320 #define QLOGIC_IB_I_SERDESTRIMDONE (1ULL << 27)
321
322 #define QLOGIC_IB_C_FREEZEMODE 0x00000002
323 #define QLOGIC_IB_C_LINKENABLE 0x00000004
324
325 #define QLOGIC_IB_I_SDMAINT 0x8000000000000000ULL
326 #define QLOGIC_IB_I_SDMADISABLED 0x4000000000000000ULL
327 #define QLOGIC_IB_I_ERROR 0x0000000080000000ULL
328 #define QLOGIC_IB_I_SPIOSENT 0x0000000040000000ULL
329 #define QLOGIC_IB_I_SPIOBUFAVAIL 0x0000000020000000ULL
330 #define QLOGIC_IB_I_GPIO 0x0000000010000000ULL
331
332 /* variables for sanity checking interrupt and errors */
333 #define QLOGIC_IB_I_BITSEXTANT \
334 (QLOGIC_IB_I_SDMAINT | QLOGIC_IB_I_SDMADISABLED | \
335 (QLOGIC_IB_I_RCVURG_MASK << QLOGIC_IB_I_RCVURG_SHIFT) | \
336 (QLOGIC_IB_I_RCVAVAIL_MASK << \
337 QLOGIC_IB_I_RCVAVAIL_SHIFT) | \
338 QLOGIC_IB_I_ERROR | QLOGIC_IB_I_SPIOSENT | \
339 QLOGIC_IB_I_SPIOBUFAVAIL | QLOGIC_IB_I_GPIO | \
340 QLOGIC_IB_I_SERDESTRIMDONE)
341
342 #define IB_HWE_BITSEXTANT \
343 (HWE_MASK(RXEMemParityErr) | \
344 HWE_MASK(TXEMemParityErr) | \
345 (QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK << \
346 QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT) | \
347 QLOGIC_IB_HWE_PCIE1PLLFAILED | \
348 QLOGIC_IB_HWE_PCIE0PLLFAILED | \
349 QLOGIC_IB_HWE_PCIEPOISONEDTLP | \
350 QLOGIC_IB_HWE_PCIECPLTIMEOUT | \
351 QLOGIC_IB_HWE_PCIEBUSPARITYXTLH | \
352 QLOGIC_IB_HWE_PCIEBUSPARITYXADM | \
353 QLOGIC_IB_HWE_PCIEBUSPARITYRADM | \
354 HWE_MASK(PowerOnBISTFailed) | \
355 QLOGIC_IB_HWE_COREPLL_FBSLIP | \
356 QLOGIC_IB_HWE_COREPLL_RFSLIP | \
357 QLOGIC_IB_HWE_SERDESPLLFAILED | \
358 HWE_MASK(IBCBusToSPCParityErr) | \
359 HWE_MASK(IBCBusFromSPCParityErr) | \
360 QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR | \
361 QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR | \
362 QLOGIC_IB_HWE_SDMAMEMREADERR | \
363 QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED | \
364 QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT | \
365 QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT | \
366 QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT | \
367 QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT | \
368 QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR | \
369 QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR | \
370 QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR | \
371 QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR)
372
373 #define IB_E_BITSEXTANT \
374 (ERR_MASK(RcvFormatErr) | ERR_MASK(RcvVCRCErr) | \
375 ERR_MASK(RcvICRCErr) | ERR_MASK(RcvMinPktLenErr) | \
376 ERR_MASK(RcvMaxPktLenErr) | ERR_MASK(RcvLongPktLenErr) | \
377 ERR_MASK(RcvShortPktLenErr) | ERR_MASK(RcvUnexpectedCharErr) | \
378 ERR_MASK(RcvUnsupportedVLErr) | ERR_MASK(RcvEBPErr) | \
379 ERR_MASK(RcvIBFlowErr) | ERR_MASK(RcvBadVersionErr) | \
380 ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr) | \
381 ERR_MASK(RcvBadTidErr) | ERR_MASK(RcvHdrLenErr) | \
382 ERR_MASK(RcvHdrErr) | ERR_MASK(RcvIBLostLinkErr) | \
383 ERR_MASK(SendSpecialTriggerErr) | \
384 ERR_MASK(SDmaDisabledErr) | ERR_MASK(SendMinPktLenErr) | \
385 ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendUnderRunErr) | \
386 ERR_MASK(SendPktLenErr) | ERR_MASK(SendDroppedSmpPktErr) | \
387 ERR_MASK(SendDroppedDataPktErr) | \
388 ERR_MASK(SendPioArmLaunchErr) | \
389 ERR_MASK(SendUnexpectedPktNumErr) | \
390 ERR_MASK(SendUnsupportedVLErr) | ERR_MASK(SendBufMisuseErr) | \
391 ERR_MASK(SDmaGenMismatchErr) | ERR_MASK(SDmaOutOfBoundErr) | \
392 ERR_MASK(SDmaTailOutOfBoundErr) | ERR_MASK(SDmaBaseErr) | \
393 ERR_MASK(SDma1stDescErr) | ERR_MASK(SDmaRpyTagErr) | \
394 ERR_MASK(SDmaDwEnErr) | ERR_MASK(SDmaMissingDwErr) | \
395 ERR_MASK(SDmaUnexpDataErr) | \
396 ERR_MASK(IBStatusChanged) | ERR_MASK(InvalidAddrErr) | \
397 ERR_MASK(ResetNegated) | ERR_MASK(HardwareErr) | \
398 ERR_MASK(SDmaDescAddrMisalignErr) | \
399 ERR_MASK(InvalidEEPCmd))
400
401 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
402 #define QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK 0x00000000000000ffULL
403 #define QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT 0
404 #define QLOGIC_IB_HWE_PCIEPOISONEDTLP 0x0000000010000000ULL
405 #define QLOGIC_IB_HWE_PCIECPLTIMEOUT 0x0000000020000000ULL
406 #define QLOGIC_IB_HWE_PCIEBUSPARITYXTLH 0x0000000040000000ULL
407 #define QLOGIC_IB_HWE_PCIEBUSPARITYXADM 0x0000000080000000ULL
408 #define QLOGIC_IB_HWE_PCIEBUSPARITYRADM 0x0000000100000000ULL
409 #define QLOGIC_IB_HWE_COREPLL_FBSLIP 0x0080000000000000ULL
410 #define QLOGIC_IB_HWE_COREPLL_RFSLIP 0x0100000000000000ULL
411 #define QLOGIC_IB_HWE_PCIE1PLLFAILED 0x0400000000000000ULL
412 #define QLOGIC_IB_HWE_PCIE0PLLFAILED 0x0800000000000000ULL
413 #define QLOGIC_IB_HWE_SERDESPLLFAILED 0x1000000000000000ULL
414 /* specific to this chip */
415 #define QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR 0x0000000000000040ULL
416 #define QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR 0x0000000000000080ULL
417 #define QLOGIC_IB_HWE_SDMAMEMREADERR 0x0000000010000000ULL
418 #define QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED 0x2000000000000000ULL
419 #define QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT 0x0100000000000000ULL
420 #define QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT 0x0200000000000000ULL
421 #define QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT 0x0400000000000000ULL
422 #define QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT 0x0800000000000000ULL
423 #define QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR 0x0000008000000000ULL
424 #define QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR 0x0000004000000000ULL
425 #define QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR 0x0000001000000000ULL
426 #define QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR 0x0000002000000000ULL
427
428 #define IBA7220_IBCC_LINKCMD_SHIFT 19
429
430 /* kr_ibcddrctrl bits */
431 #define IBA7220_IBC_DLIDLMC_MASK 0xFFFFFFFFUL
432 #define IBA7220_IBC_DLIDLMC_SHIFT 32
433
434 #define IBA7220_IBC_HRTBT_MASK (SYM_RMASK(IBCDDRCtrl, HRTBT_AUTO) | \
435 SYM_RMASK(IBCDDRCtrl, HRTBT_ENB))
436 #define IBA7220_IBC_HRTBT_SHIFT SYM_LSB(IBCDDRCtrl, HRTBT_ENB)
437
438 #define IBA7220_IBC_LANE_REV_SUPPORTED (1<<8)
439 #define IBA7220_IBC_LREV_MASK 1
440 #define IBA7220_IBC_LREV_SHIFT 8
441 #define IBA7220_IBC_RXPOL_MASK 1
442 #define IBA7220_IBC_RXPOL_SHIFT 7
443 #define IBA7220_IBC_WIDTH_SHIFT 5
444 #define IBA7220_IBC_WIDTH_MASK 0x3
445 #define IBA7220_IBC_WIDTH_1X_ONLY (0 << IBA7220_IBC_WIDTH_SHIFT)
446 #define IBA7220_IBC_WIDTH_4X_ONLY (1 << IBA7220_IBC_WIDTH_SHIFT)
447 #define IBA7220_IBC_WIDTH_AUTONEG (2 << IBA7220_IBC_WIDTH_SHIFT)
448 #define IBA7220_IBC_SPEED_AUTONEG (1 << 1)
449 #define IBA7220_IBC_SPEED_SDR (1 << 2)
450 #define IBA7220_IBC_SPEED_DDR (1 << 3)
451 #define IBA7220_IBC_SPEED_AUTONEG_MASK (0x7 << 1)
452 #define IBA7220_IBC_IBTA_1_2_MASK (1)
453
454 /* kr_ibcddrstatus */
455 /* link latency shift is 0, don't bother defining */
456 #define IBA7220_DDRSTAT_LINKLAT_MASK 0x3ffffff
457
458 /* kr_extstatus bits */
459 #define QLOGIC_IB_EXTS_FREQSEL 0x2
460 #define QLOGIC_IB_EXTS_SERDESSEL 0x4
461 #define QLOGIC_IB_EXTS_MEMBIST_ENDTEST 0x0000000000004000
462 #define QLOGIC_IB_EXTS_MEMBIST_DISABLED 0x0000000000008000
463
464 /* kr_xgxsconfig bits */
465 #define QLOGIC_IB_XGXS_RESET 0x5ULL
466 #define QLOGIC_IB_XGXS_FC_SAFE (1ULL << 63)
467
468 /* kr_rcvpktledcnt */
469 #define IBA7220_LEDBLINK_ON_SHIFT 32 /* 4ns period on after packet */
470 #define IBA7220_LEDBLINK_OFF_SHIFT 0 /* 4ns period off before next on */
471
472 #define _QIB_GPIO_SDA_NUM 1
473 #define _QIB_GPIO_SCL_NUM 0
474 #define QIB_TWSI_EEPROM_DEV 0xA2 /* All Production 7220 cards. */
475 #define QIB_TWSI_TEMP_DEV 0x98
476
477 /* HW counter clock is at 4nsec */
478 #define QIB_7220_PSXMITWAIT_CHECK_RATE 4000
479
480 #define IBA7220_R_INTRAVAIL_SHIFT 17
481 #define IBA7220_R_PKEY_DIS_SHIFT 34
482 #define IBA7220_R_TAILUPD_SHIFT 35
483 #define IBA7220_R_CTXTCFG_SHIFT 36
484
485 #define IBA7220_HDRHEAD_PKTINT_SHIFT 32 /* interrupt cnt in upper 32 bits */
486
487 /*
488 * the size bits give us 2^N, in KB units. 0 marks as invalid,
489 * and 7 is reserved. We currently use only 2KB and 4KB
490 */
491 #define IBA7220_TID_SZ_SHIFT 37 /* shift to 3bit size selector */
492 #define IBA7220_TID_SZ_2K (1UL << IBA7220_TID_SZ_SHIFT) /* 2KB */
493 #define IBA7220_TID_SZ_4K (2UL << IBA7220_TID_SZ_SHIFT) /* 4KB */
494 #define IBA7220_TID_PA_SHIFT 11U /* TID addr in chip stored w/o low bits */
495 #define PBC_7220_VL15_SEND (1ULL << 63) /* pbc; VL15, no credit check */
496 #define PBC_7220_VL15_SEND_CTRL (1ULL << 31) /* control version of same */
497
498 #define AUTONEG_TRIES 5 /* sequential retries to negotiate DDR */
499
500 /* packet rate matching delay multiplier */
501 static u8 rate_to_delay[2][2] = {
502 /* 1x, 4x */
503 { 8, 2 }, /* SDR */
504 { 4, 1 } /* DDR */
505 };
506
507 static u8 ib_rate_to_delay[IB_RATE_120_GBPS + 1] = {
508 [IB_RATE_2_5_GBPS] = 8,
509 [IB_RATE_5_GBPS] = 4,
510 [IB_RATE_10_GBPS] = 2,
511 [IB_RATE_20_GBPS] = 1
512 };
513
514 #define IBA7220_LINKSPEED_SHIFT SYM_LSB(IBCStatus, LinkSpeedActive)
515 #define IBA7220_LINKWIDTH_SHIFT SYM_LSB(IBCStatus, LinkWidthActive)
516
517 /* link training states, from IBC */
518 #define IB_7220_LT_STATE_DISABLED 0x00
519 #define IB_7220_LT_STATE_LINKUP 0x01
520 #define IB_7220_LT_STATE_POLLACTIVE 0x02
521 #define IB_7220_LT_STATE_POLLQUIET 0x03
522 #define IB_7220_LT_STATE_SLEEPDELAY 0x04
523 #define IB_7220_LT_STATE_SLEEPQUIET 0x05
524 #define IB_7220_LT_STATE_CFGDEBOUNCE 0x08
525 #define IB_7220_LT_STATE_CFGRCVFCFG 0x09
526 #define IB_7220_LT_STATE_CFGWAITRMT 0x0a
527 #define IB_7220_LT_STATE_CFGIDLE 0x0b
528 #define IB_7220_LT_STATE_RECOVERRETRAIN 0x0c
529 #define IB_7220_LT_STATE_RECOVERWAITRMT 0x0e
530 #define IB_7220_LT_STATE_RECOVERIDLE 0x0f
531
532 /* link state machine states from IBC */
533 #define IB_7220_L_STATE_DOWN 0x0
534 #define IB_7220_L_STATE_INIT 0x1
535 #define IB_7220_L_STATE_ARM 0x2
536 #define IB_7220_L_STATE_ACTIVE 0x3
537 #define IB_7220_L_STATE_ACT_DEFER 0x4
538
539 static const u8 qib_7220_physportstate[0x20] = {
540 [IB_7220_LT_STATE_DISABLED] = IB_PHYSPORTSTATE_DISABLED,
541 [IB_7220_LT_STATE_LINKUP] = IB_PHYSPORTSTATE_LINKUP,
542 [IB_7220_LT_STATE_POLLACTIVE] = IB_PHYSPORTSTATE_POLL,
543 [IB_7220_LT_STATE_POLLQUIET] = IB_PHYSPORTSTATE_POLL,
544 [IB_7220_LT_STATE_SLEEPDELAY] = IB_PHYSPORTSTATE_SLEEP,
545 [IB_7220_LT_STATE_SLEEPQUIET] = IB_PHYSPORTSTATE_SLEEP,
546 [IB_7220_LT_STATE_CFGDEBOUNCE] =
547 IB_PHYSPORTSTATE_CFG_TRAIN,
548 [IB_7220_LT_STATE_CFGRCVFCFG] =
549 IB_PHYSPORTSTATE_CFG_TRAIN,
550 [IB_7220_LT_STATE_CFGWAITRMT] =
551 IB_PHYSPORTSTATE_CFG_TRAIN,
552 [IB_7220_LT_STATE_CFGIDLE] = IB_PHYSPORTSTATE_CFG_TRAIN,
553 [IB_7220_LT_STATE_RECOVERRETRAIN] =
554 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
555 [IB_7220_LT_STATE_RECOVERWAITRMT] =
556 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
557 [IB_7220_LT_STATE_RECOVERIDLE] =
558 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
559 [0x10] = IB_PHYSPORTSTATE_CFG_TRAIN,
560 [0x11] = IB_PHYSPORTSTATE_CFG_TRAIN,
561 [0x12] = IB_PHYSPORTSTATE_CFG_TRAIN,
562 [0x13] = IB_PHYSPORTSTATE_CFG_TRAIN,
563 [0x14] = IB_PHYSPORTSTATE_CFG_TRAIN,
564 [0x15] = IB_PHYSPORTSTATE_CFG_TRAIN,
565 [0x16] = IB_PHYSPORTSTATE_CFG_TRAIN,
566 [0x17] = IB_PHYSPORTSTATE_CFG_TRAIN
567 };
568
569 int qib_special_trigger;
570 module_param_named(special_trigger, qib_special_trigger, int, S_IRUGO);
571 MODULE_PARM_DESC(special_trigger, "Enable SpecialTrigger arm/launch");
572
573 #define IBCBUSFRSPCPARITYERR HWE_MASK(IBCBusFromSPCParityErr)
574 #define IBCBUSTOSPCPARITYERR HWE_MASK(IBCBusToSPCParityErr)
575
576 #define SYM_MASK_BIT(regname, fldname, bit) ((u64) \
577 (1ULL << (SYM_LSB(regname, fldname) + (bit))))
578
579 #define TXEMEMPARITYERR_PIOBUF \
580 SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 0)
581 #define TXEMEMPARITYERR_PIOPBC \
582 SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 1)
583 #define TXEMEMPARITYERR_PIOLAUNCHFIFO \
584 SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 2)
585
586 #define RXEMEMPARITYERR_RCVBUF \
587 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 0)
588 #define RXEMEMPARITYERR_LOOKUPQ \
589 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 1)
590 #define RXEMEMPARITYERR_EXPTID \
591 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 2)
592 #define RXEMEMPARITYERR_EAGERTID \
593 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 3)
594 #define RXEMEMPARITYERR_FLAGBUF \
595 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 4)
596 #define RXEMEMPARITYERR_DATAINFO \
597 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 5)
598 #define RXEMEMPARITYERR_HDRINFO \
599 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 6)
600
601 /* 7220 specific hardware errors... */
602 static const struct qib_hwerror_msgs qib_7220_hwerror_msgs[] = {
603 /* generic hardware errors */
604 QLOGIC_IB_HWE_MSG(IBCBUSFRSPCPARITYERR, "QIB2IB Parity"),
605 QLOGIC_IB_HWE_MSG(IBCBUSTOSPCPARITYERR, "IB2QIB Parity"),
606
607 QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOBUF,
608 "TXE PIOBUF Memory Parity"),
609 QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOPBC,
610 "TXE PIOPBC Memory Parity"),
611 QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOLAUNCHFIFO,
612 "TXE PIOLAUNCHFIFO Memory Parity"),
613
614 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_RCVBUF,
615 "RXE RCVBUF Memory Parity"),
616 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_LOOKUPQ,
617 "RXE LOOKUPQ Memory Parity"),
618 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_EAGERTID,
619 "RXE EAGERTID Memory Parity"),
620 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_EXPTID,
621 "RXE EXPTID Memory Parity"),
622 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_FLAGBUF,
623 "RXE FLAGBUF Memory Parity"),
624 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_DATAINFO,
625 "RXE DATAINFO Memory Parity"),
626 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_HDRINFO,
627 "RXE HDRINFO Memory Parity"),
628
629 /* chip-specific hardware errors */
630 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEPOISONEDTLP,
631 "PCIe Poisoned TLP"),
632 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLTIMEOUT,
633 "PCIe completion timeout"),
634 /*
635 * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
636 * parity or memory parity error failures, because most likely we
637 * won't be able to talk to the core of the chip. Nonetheless, we
638 * might see them, if they are in parts of the PCIe core that aren't
639 * essential.
640 */
641 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE1PLLFAILED,
642 "PCIePLL1"),
643 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE0PLLFAILED,
644 "PCIePLL0"),
645 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYXTLH,
646 "PCIe XTLH core parity"),
647 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYXADM,
648 "PCIe ADM TX core parity"),
649 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYRADM,
650 "PCIe ADM RX core parity"),
651 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_SERDESPLLFAILED,
652 "SerDes PLL"),
653 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR,
654 "PCIe cpl header queue"),
655 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR,
656 "PCIe cpl data queue"),
657 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_SDMAMEMREADERR,
658 "Send DMA memory read"),
659 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED,
660 "uC PLL clock not locked"),
661 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT,
662 "PCIe serdes Q0 no clock"),
663 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT,
664 "PCIe serdes Q1 no clock"),
665 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT,
666 "PCIe serdes Q2 no clock"),
667 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT,
668 "PCIe serdes Q3 no clock"),
669 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR,
670 "DDS RXEQ memory parity"),
671 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR,
672 "IB uC memory parity"),
673 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR,
674 "PCIe uC oct0 memory parity"),
675 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR,
676 "PCIe uC oct1 memory parity"),
677 };
678
679 #define RXE_PARITY (RXEMEMPARITYERR_EAGERTID|RXEMEMPARITYERR_EXPTID)
680
681 #define QLOGIC_IB_E_PKTERRS (\
682 ERR_MASK(SendPktLenErr) | \
683 ERR_MASK(SendDroppedDataPktErr) | \
684 ERR_MASK(RcvVCRCErr) | \
685 ERR_MASK(RcvICRCErr) | \
686 ERR_MASK(RcvShortPktLenErr) | \
687 ERR_MASK(RcvEBPErr))
688
689 /* Convenience for decoding Send DMA errors */
690 #define QLOGIC_IB_E_SDMAERRS ( \
691 ERR_MASK(SDmaGenMismatchErr) | \
692 ERR_MASK(SDmaOutOfBoundErr) | \
693 ERR_MASK(SDmaTailOutOfBoundErr) | ERR_MASK(SDmaBaseErr) | \
694 ERR_MASK(SDma1stDescErr) | ERR_MASK(SDmaRpyTagErr) | \
695 ERR_MASK(SDmaDwEnErr) | ERR_MASK(SDmaMissingDwErr) | \
696 ERR_MASK(SDmaUnexpDataErr) | \
697 ERR_MASK(SDmaDescAddrMisalignErr) | \
698 ERR_MASK(SDmaDisabledErr) | \
699 ERR_MASK(SendBufMisuseErr))
700
701 /* These are all rcv-related errors which we want to count for stats */
702 #define E_SUM_PKTERRS \
703 (ERR_MASK(RcvHdrLenErr) | ERR_MASK(RcvBadTidErr) | \
704 ERR_MASK(RcvBadVersionErr) | ERR_MASK(RcvHdrErr) | \
705 ERR_MASK(RcvLongPktLenErr) | ERR_MASK(RcvShortPktLenErr) | \
706 ERR_MASK(RcvMaxPktLenErr) | ERR_MASK(RcvMinPktLenErr) | \
707 ERR_MASK(RcvFormatErr) | ERR_MASK(RcvUnsupportedVLErr) | \
708 ERR_MASK(RcvUnexpectedCharErr) | ERR_MASK(RcvEBPErr))
709
710 /* These are all send-related errors which we want to count for stats */
711 #define E_SUM_ERRS \
712 (ERR_MASK(SendPioArmLaunchErr) | ERR_MASK(SendUnexpectedPktNumErr) | \
713 ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
714 ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendUnsupportedVLErr) | \
715 ERR_MASK(SendMinPktLenErr) | ERR_MASK(SendPktLenErr) | \
716 ERR_MASK(InvalidAddrErr))
717
718 /*
719 * this is similar to E_SUM_ERRS, but can't ignore armlaunch, don't ignore
720 * errors not related to freeze and cancelling buffers. Can't ignore
721 * armlaunch because could get more while still cleaning up, and need
722 * to cancel those as they happen.
723 */
724 #define E_SPKT_ERRS_IGNORE \
725 (ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
726 ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendMinPktLenErr) | \
727 ERR_MASK(SendPktLenErr))
728
729 /*
730 * these are errors that can occur when the link changes state while
731 * a packet is being sent or received. This doesn't cover things
732 * like EBP or VCRC that can be the result of a sending having the
733 * link change state, so we receive a "known bad" packet.
734 */
735 #define E_SUM_LINK_PKTERRS \
736 (ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
737 ERR_MASK(SendMinPktLenErr) | ERR_MASK(SendPktLenErr) | \
738 ERR_MASK(RcvShortPktLenErr) | ERR_MASK(RcvMinPktLenErr) | \
739 ERR_MASK(RcvUnexpectedCharErr))
740
741 static void autoneg_7220_work(struct work_struct *);
742 static u32 __iomem *qib_7220_getsendbuf(struct qib_pportdata *, u64, u32 *);
743
744 /*
745 * Called when we might have an error that is specific to a particular
746 * PIO buffer, and may need to cancel that buffer, so it can be re-used.
747 * because we don't need to force the update of pioavail.
748 */
749 static void qib_disarm_7220_senderrbufs(struct qib_pportdata *ppd)
750 {
751 unsigned long sbuf[3];
752 struct qib_devdata *dd = ppd->dd;
753
754 /*
755 * It's possible that sendbuffererror could have bits set; might
756 * have already done this as a result of hardware error handling.
757 */
758 /* read these before writing errorclear */
759 sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
760 sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
761 sbuf[2] = qib_read_kreg64(dd, kr_sendbuffererror + 2);
762
763 if (sbuf[0] || sbuf[1] || sbuf[2])
764 qib_disarm_piobufs_set(dd, sbuf,
765 dd->piobcnt2k + dd->piobcnt4k);
766 }
767
768 static void qib_7220_txe_recover(struct qib_devdata *dd)
769 {
770 qib_devinfo(dd->pcidev, "Recovering from TXE PIO parity error\n");
771 qib_disarm_7220_senderrbufs(dd->pport);
772 }
773
774 /*
775 * This is called with interrupts disabled and sdma_lock held.
776 */
777 static void qib_7220_sdma_sendctrl(struct qib_pportdata *ppd, unsigned op)
778 {
779 struct qib_devdata *dd = ppd->dd;
780 u64 set_sendctrl = 0;
781 u64 clr_sendctrl = 0;
782
783 if (op & QIB_SDMA_SENDCTRL_OP_ENABLE)
784 set_sendctrl |= SYM_MASK(SendCtrl, SDmaEnable);
785 else
786 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaEnable);
787
788 if (op & QIB_SDMA_SENDCTRL_OP_INTENABLE)
789 set_sendctrl |= SYM_MASK(SendCtrl, SDmaIntEnable);
790 else
791 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaIntEnable);
792
793 if (op & QIB_SDMA_SENDCTRL_OP_HALT)
794 set_sendctrl |= SYM_MASK(SendCtrl, SDmaHalt);
795 else
796 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaHalt);
797
798 spin_lock(&dd->sendctrl_lock);
799
800 dd->sendctrl |= set_sendctrl;
801 dd->sendctrl &= ~clr_sendctrl;
802
803 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
804 qib_write_kreg(dd, kr_scratch, 0);
805
806 spin_unlock(&dd->sendctrl_lock);
807 }
808
809 static void qib_decode_7220_sdma_errs(struct qib_pportdata *ppd,
810 u64 err, char *buf, size_t blen)
811 {
812 static const struct {
813 u64 err;
814 const char *msg;
815 } errs[] = {
816 { ERR_MASK(SDmaGenMismatchErr),
817 "SDmaGenMismatch" },
818 { ERR_MASK(SDmaOutOfBoundErr),
819 "SDmaOutOfBound" },
820 { ERR_MASK(SDmaTailOutOfBoundErr),
821 "SDmaTailOutOfBound" },
822 { ERR_MASK(SDmaBaseErr),
823 "SDmaBase" },
824 { ERR_MASK(SDma1stDescErr),
825 "SDma1stDesc" },
826 { ERR_MASK(SDmaRpyTagErr),
827 "SDmaRpyTag" },
828 { ERR_MASK(SDmaDwEnErr),
829 "SDmaDwEn" },
830 { ERR_MASK(SDmaMissingDwErr),
831 "SDmaMissingDw" },
832 { ERR_MASK(SDmaUnexpDataErr),
833 "SDmaUnexpData" },
834 { ERR_MASK(SDmaDescAddrMisalignErr),
835 "SDmaDescAddrMisalign" },
836 { ERR_MASK(SendBufMisuseErr),
837 "SendBufMisuse" },
838 { ERR_MASK(SDmaDisabledErr),
839 "SDmaDisabled" },
840 };
841 int i;
842 size_t bidx = 0;
843
844 for (i = 0; i < ARRAY_SIZE(errs); i++) {
845 if (err & errs[i].err)
846 bidx += scnprintf(buf + bidx, blen - bidx,
847 "%s ", errs[i].msg);
848 }
849 }
850
851 /*
852 * This is called as part of link down clean up so disarm and flush
853 * all send buffers so that SMP packets can be sent.
854 */
855 static void qib_7220_sdma_hw_clean_up(struct qib_pportdata *ppd)
856 {
857 /* This will trigger the Abort interrupt */
858 sendctrl_7220_mod(ppd, QIB_SENDCTRL_DISARM_ALL | QIB_SENDCTRL_FLUSH |
859 QIB_SENDCTRL_AVAIL_BLIP);
860 ppd->dd->upd_pio_shadow = 1; /* update our idea of what's busy */
861 }
862
863 static void qib_sdma_7220_setlengen(struct qib_pportdata *ppd)
864 {
865 /*
866 * Set SendDmaLenGen and clear and set
867 * the MSB of the generation count to enable generation checking
868 * and load the internal generation counter.
869 */
870 qib_write_kreg(ppd->dd, kr_senddmalengen, ppd->sdma_descq_cnt);
871 qib_write_kreg(ppd->dd, kr_senddmalengen,
872 ppd->sdma_descq_cnt |
873 (1ULL << QIB_7220_SendDmaLenGen_Generation_MSB));
874 }
875
876 static void qib_7220_sdma_hw_start_up(struct qib_pportdata *ppd)
877 {
878 qib_sdma_7220_setlengen(ppd);
879 qib_sdma_update_7220_tail(ppd, 0); /* Set SendDmaTail */
880 ppd->sdma_head_dma[0] = 0;
881 }
882
883 #define DISABLES_SDMA ( \
884 ERR_MASK(SDmaDisabledErr) | \
885 ERR_MASK(SDmaBaseErr) | \
886 ERR_MASK(SDmaTailOutOfBoundErr) | \
887 ERR_MASK(SDmaOutOfBoundErr) | \
888 ERR_MASK(SDma1stDescErr) | \
889 ERR_MASK(SDmaRpyTagErr) | \
890 ERR_MASK(SDmaGenMismatchErr) | \
891 ERR_MASK(SDmaDescAddrMisalignErr) | \
892 ERR_MASK(SDmaMissingDwErr) | \
893 ERR_MASK(SDmaDwEnErr))
894
895 static void sdma_7220_errors(struct qib_pportdata *ppd, u64 errs)
896 {
897 unsigned long flags;
898 struct qib_devdata *dd = ppd->dd;
899 char *msg;
900
901 errs &= QLOGIC_IB_E_SDMAERRS;
902
903 msg = dd->cspec->sdmamsgbuf;
904 qib_decode_7220_sdma_errs(ppd, errs, msg, sizeof dd->cspec->sdmamsgbuf);
905 spin_lock_irqsave(&ppd->sdma_lock, flags);
906
907 if (errs & ERR_MASK(SendBufMisuseErr)) {
908 unsigned long sbuf[3];
909
910 sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
911 sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
912 sbuf[2] = qib_read_kreg64(dd, kr_sendbuffererror + 2);
913
914 qib_dev_err(ppd->dd,
915 "IB%u:%u SendBufMisuse: %04lx %016lx %016lx\n",
916 ppd->dd->unit, ppd->port, sbuf[2], sbuf[1],
917 sbuf[0]);
918 }
919
920 if (errs & ERR_MASK(SDmaUnexpDataErr))
921 qib_dev_err(dd, "IB%u:%u SDmaUnexpData\n", ppd->dd->unit,
922 ppd->port);
923
924 switch (ppd->sdma_state.current_state) {
925 case qib_sdma_state_s00_hw_down:
926 /* not expecting any interrupts */
927 break;
928
929 case qib_sdma_state_s10_hw_start_up_wait:
930 /* handled in intr path */
931 break;
932
933 case qib_sdma_state_s20_idle:
934 /* not expecting any interrupts */
935 break;
936
937 case qib_sdma_state_s30_sw_clean_up_wait:
938 /* not expecting any interrupts */
939 break;
940
941 case qib_sdma_state_s40_hw_clean_up_wait:
942 if (errs & ERR_MASK(SDmaDisabledErr))
943 __qib_sdma_process_event(ppd,
944 qib_sdma_event_e50_hw_cleaned);
945 break;
946
947 case qib_sdma_state_s50_hw_halt_wait:
948 /* handled in intr path */
949 break;
950
951 case qib_sdma_state_s99_running:
952 if (errs & DISABLES_SDMA)
953 __qib_sdma_process_event(ppd,
954 qib_sdma_event_e7220_err_halted);
955 break;
956 }
957
958 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
959 }
960
961 /*
962 * Decode the error status into strings, deciding whether to always
963 * print * it or not depending on "normal packet errors" vs everything
964 * else. Return 1 if "real" errors, otherwise 0 if only packet
965 * errors, so caller can decide what to print with the string.
966 */
967 static int qib_decode_7220_err(struct qib_devdata *dd, char *buf, size_t blen,
968 u64 err)
969 {
970 int iserr = 1;
971
972 *buf = '\0';
973 if (err & QLOGIC_IB_E_PKTERRS) {
974 if (!(err & ~QLOGIC_IB_E_PKTERRS))
975 iserr = 0;
976 if ((err & ERR_MASK(RcvICRCErr)) &&
977 !(err & (ERR_MASK(RcvVCRCErr) | ERR_MASK(RcvEBPErr))))
978 strlcat(buf, "CRC ", blen);
979 if (!iserr)
980 goto done;
981 }
982 if (err & ERR_MASK(RcvHdrLenErr))
983 strlcat(buf, "rhdrlen ", blen);
984 if (err & ERR_MASK(RcvBadTidErr))
985 strlcat(buf, "rbadtid ", blen);
986 if (err & ERR_MASK(RcvBadVersionErr))
987 strlcat(buf, "rbadversion ", blen);
988 if (err & ERR_MASK(RcvHdrErr))
989 strlcat(buf, "rhdr ", blen);
990 if (err & ERR_MASK(SendSpecialTriggerErr))
991 strlcat(buf, "sendspecialtrigger ", blen);
992 if (err & ERR_MASK(RcvLongPktLenErr))
993 strlcat(buf, "rlongpktlen ", blen);
994 if (err & ERR_MASK(RcvMaxPktLenErr))
995 strlcat(buf, "rmaxpktlen ", blen);
996 if (err & ERR_MASK(RcvMinPktLenErr))
997 strlcat(buf, "rminpktlen ", blen);
998 if (err & ERR_MASK(SendMinPktLenErr))
999 strlcat(buf, "sminpktlen ", blen);
1000 if (err & ERR_MASK(RcvFormatErr))
1001 strlcat(buf, "rformaterr ", blen);
1002 if (err & ERR_MASK(RcvUnsupportedVLErr))
1003 strlcat(buf, "runsupvl ", blen);
1004 if (err & ERR_MASK(RcvUnexpectedCharErr))
1005 strlcat(buf, "runexpchar ", blen);
1006 if (err & ERR_MASK(RcvIBFlowErr))
1007 strlcat(buf, "ribflow ", blen);
1008 if (err & ERR_MASK(SendUnderRunErr))
1009 strlcat(buf, "sunderrun ", blen);
1010 if (err & ERR_MASK(SendPioArmLaunchErr))
1011 strlcat(buf, "spioarmlaunch ", blen);
1012 if (err & ERR_MASK(SendUnexpectedPktNumErr))
1013 strlcat(buf, "sunexperrpktnum ", blen);
1014 if (err & ERR_MASK(SendDroppedSmpPktErr))
1015 strlcat(buf, "sdroppedsmppkt ", blen);
1016 if (err & ERR_MASK(SendMaxPktLenErr))
1017 strlcat(buf, "smaxpktlen ", blen);
1018 if (err & ERR_MASK(SendUnsupportedVLErr))
1019 strlcat(buf, "sunsupVL ", blen);
1020 if (err & ERR_MASK(InvalidAddrErr))
1021 strlcat(buf, "invalidaddr ", blen);
1022 if (err & ERR_MASK(RcvEgrFullErr))
1023 strlcat(buf, "rcvegrfull ", blen);
1024 if (err & ERR_MASK(RcvHdrFullErr))
1025 strlcat(buf, "rcvhdrfull ", blen);
1026 if (err & ERR_MASK(IBStatusChanged))
1027 strlcat(buf, "ibcstatuschg ", blen);
1028 if (err & ERR_MASK(RcvIBLostLinkErr))
1029 strlcat(buf, "riblostlink ", blen);
1030 if (err & ERR_MASK(HardwareErr))
1031 strlcat(buf, "hardware ", blen);
1032 if (err & ERR_MASK(ResetNegated))
1033 strlcat(buf, "reset ", blen);
1034 if (err & QLOGIC_IB_E_SDMAERRS)
1035 qib_decode_7220_sdma_errs(dd->pport, err, buf, blen);
1036 if (err & ERR_MASK(InvalidEEPCmd))
1037 strlcat(buf, "invalideepromcmd ", blen);
1038 done:
1039 return iserr;
1040 }
1041
1042 static void reenable_7220_chase(unsigned long opaque)
1043 {
1044 struct qib_pportdata *ppd = (struct qib_pportdata *)opaque;
1045 ppd->cpspec->chase_timer.expires = 0;
1046 qib_set_ib_7220_lstate(ppd, QLOGIC_IB_IBCC_LINKCMD_DOWN,
1047 QLOGIC_IB_IBCC_LINKINITCMD_POLL);
1048 }
1049
1050 static void handle_7220_chase(struct qib_pportdata *ppd, u64 ibcst)
1051 {
1052 u8 ibclt;
1053 u64 tnow;
1054
1055 ibclt = (u8)SYM_FIELD(ibcst, IBCStatus, LinkTrainingState);
1056
1057 /*
1058 * Detect and handle the state chase issue, where we can
1059 * get stuck if we are unlucky on timing on both sides of
1060 * the link. If we are, we disable, set a timer, and
1061 * then re-enable.
1062 */
1063 switch (ibclt) {
1064 case IB_7220_LT_STATE_CFGRCVFCFG:
1065 case IB_7220_LT_STATE_CFGWAITRMT:
1066 case IB_7220_LT_STATE_TXREVLANES:
1067 case IB_7220_LT_STATE_CFGENH:
1068 tnow = get_jiffies_64();
1069 if (ppd->cpspec->chase_end &&
1070 time_after64(tnow, ppd->cpspec->chase_end)) {
1071 ppd->cpspec->chase_end = 0;
1072 qib_set_ib_7220_lstate(ppd,
1073 QLOGIC_IB_IBCC_LINKCMD_DOWN,
1074 QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
1075 ppd->cpspec->chase_timer.expires = jiffies +
1076 QIB_CHASE_DIS_TIME;
1077 add_timer(&ppd->cpspec->chase_timer);
1078 } else if (!ppd->cpspec->chase_end)
1079 ppd->cpspec->chase_end = tnow + QIB_CHASE_TIME;
1080 break;
1081
1082 default:
1083 ppd->cpspec->chase_end = 0;
1084 break;
1085 }
1086 }
1087
1088 static void handle_7220_errors(struct qib_devdata *dd, u64 errs)
1089 {
1090 char *msg;
1091 u64 ignore_this_time = 0;
1092 u64 iserr = 0;
1093 int log_idx;
1094 struct qib_pportdata *ppd = dd->pport;
1095 u64 mask;
1096
1097 /* don't report errors that are masked */
1098 errs &= dd->cspec->errormask;
1099 msg = dd->cspec->emsgbuf;
1100
1101 /* do these first, they are most important */
1102 if (errs & ERR_MASK(HardwareErr))
1103 qib_7220_handle_hwerrors(dd, msg, sizeof dd->cspec->emsgbuf);
1104 else
1105 for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
1106 if (errs & dd->eep_st_masks[log_idx].errs_to_log)
1107 qib_inc_eeprom_err(dd, log_idx, 1);
1108
1109 if (errs & QLOGIC_IB_E_SDMAERRS)
1110 sdma_7220_errors(ppd, errs);
1111
1112 if (errs & ~IB_E_BITSEXTANT)
1113 qib_dev_err(dd, "error interrupt with unknown errors "
1114 "%llx set\n", (unsigned long long)
1115 (errs & ~IB_E_BITSEXTANT));
1116
1117 if (errs & E_SUM_ERRS) {
1118 qib_disarm_7220_senderrbufs(ppd);
1119 if ((errs & E_SUM_LINK_PKTERRS) &&
1120 !(ppd->lflags & QIBL_LINKACTIVE)) {
1121 /*
1122 * This can happen when trying to bring the link
1123 * up, but the IB link changes state at the "wrong"
1124 * time. The IB logic then complains that the packet
1125 * isn't valid. We don't want to confuse people, so
1126 * we just don't print them, except at debug
1127 */
1128 ignore_this_time = errs & E_SUM_LINK_PKTERRS;
1129 }
1130 } else if ((errs & E_SUM_LINK_PKTERRS) &&
1131 !(ppd->lflags & QIBL_LINKACTIVE)) {
1132 /*
1133 * This can happen when SMA is trying to bring the link
1134 * up, but the IB link changes state at the "wrong" time.
1135 * The IB logic then complains that the packet isn't
1136 * valid. We don't want to confuse people, so we just
1137 * don't print them, except at debug
1138 */
1139 ignore_this_time = errs & E_SUM_LINK_PKTERRS;
1140 }
1141
1142 qib_write_kreg(dd, kr_errclear, errs);
1143
1144 errs &= ~ignore_this_time;
1145 if (!errs)
1146 goto done;
1147
1148 /*
1149 * The ones we mask off are handled specially below
1150 * or above. Also mask SDMADISABLED by default as it
1151 * is too chatty.
1152 */
1153 mask = ERR_MASK(IBStatusChanged) |
1154 ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr) |
1155 ERR_MASK(HardwareErr) | ERR_MASK(SDmaDisabledErr);
1156
1157 qib_decode_7220_err(dd, msg, sizeof dd->cspec->emsgbuf, errs & ~mask);
1158
1159 if (errs & E_SUM_PKTERRS)
1160 qib_stats.sps_rcverrs++;
1161 if (errs & E_SUM_ERRS)
1162 qib_stats.sps_txerrs++;
1163 iserr = errs & ~(E_SUM_PKTERRS | QLOGIC_IB_E_PKTERRS |
1164 ERR_MASK(SDmaDisabledErr));
1165
1166 if (errs & ERR_MASK(IBStatusChanged)) {
1167 u64 ibcs;
1168
1169 ibcs = qib_read_kreg64(dd, kr_ibcstatus);
1170 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
1171 handle_7220_chase(ppd, ibcs);
1172
1173 /* Update our picture of width and speed from chip */
1174 ppd->link_width_active =
1175 ((ibcs >> IBA7220_LINKWIDTH_SHIFT) & 1) ?
1176 IB_WIDTH_4X : IB_WIDTH_1X;
1177 ppd->link_speed_active =
1178 ((ibcs >> IBA7220_LINKSPEED_SHIFT) & 1) ?
1179 QIB_IB_DDR : QIB_IB_SDR;
1180
1181 /*
1182 * Since going into a recovery state causes the link state
1183 * to go down and since recovery is transitory, it is better
1184 * if we "miss" ever seeing the link training state go into
1185 * recovery (i.e., ignore this transition for link state
1186 * special handling purposes) without updating lastibcstat.
1187 */
1188 if (qib_7220_phys_portstate(ibcs) !=
1189 IB_PHYSPORTSTATE_LINK_ERR_RECOVER)
1190 qib_handle_e_ibstatuschanged(ppd, ibcs);
1191 }
1192
1193 if (errs & ERR_MASK(ResetNegated)) {
1194 qib_dev_err(dd, "Got reset, requires re-init "
1195 "(unload and reload driver)\n");
1196 dd->flags &= ~QIB_INITTED; /* needs re-init */
1197 /* mark as having had error */
1198 *dd->devstatusp |= QIB_STATUS_HWERROR;
1199 *dd->pport->statusp &= ~QIB_STATUS_IB_CONF;
1200 }
1201
1202 if (*msg && iserr)
1203 qib_dev_porterr(dd, ppd->port, "%s error\n", msg);
1204
1205 if (ppd->state_wanted & ppd->lflags)
1206 wake_up_interruptible(&ppd->state_wait);
1207
1208 /*
1209 * If there were hdrq or egrfull errors, wake up any processes
1210 * waiting in poll. We used to try to check which contexts had
1211 * the overflow, but given the cost of that and the chip reads
1212 * to support it, it's better to just wake everybody up if we
1213 * get an overflow; waiters can poll again if it's not them.
1214 */
1215 if (errs & (ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr))) {
1216 qib_handle_urcv(dd, ~0U);
1217 if (errs & ERR_MASK(RcvEgrFullErr))
1218 qib_stats.sps_buffull++;
1219 else
1220 qib_stats.sps_hdrfull++;
1221 }
1222 done:
1223 return;
1224 }
1225
1226 /* enable/disable chip from delivering interrupts */
1227 static void qib_7220_set_intr_state(struct qib_devdata *dd, u32 enable)
1228 {
1229 if (enable) {
1230 if (dd->flags & QIB_BADINTR)
1231 return;
1232 qib_write_kreg(dd, kr_intmask, ~0ULL);
1233 /* force re-interrupt of any pending interrupts. */
1234 qib_write_kreg(dd, kr_intclear, 0ULL);
1235 } else
1236 qib_write_kreg(dd, kr_intmask, 0ULL);
1237 }
1238
1239 /*
1240 * Try to cleanup as much as possible for anything that might have gone
1241 * wrong while in freeze mode, such as pio buffers being written by user
1242 * processes (causing armlaunch), send errors due to going into freeze mode,
1243 * etc., and try to avoid causing extra interrupts while doing so.
1244 * Forcibly update the in-memory pioavail register copies after cleanup
1245 * because the chip won't do it while in freeze mode (the register values
1246 * themselves are kept correct).
1247 * Make sure that we don't lose any important interrupts by using the chip
1248 * feature that says that writing 0 to a bit in *clear that is set in
1249 * *status will cause an interrupt to be generated again (if allowed by
1250 * the *mask value).
1251 * This is in chip-specific code because of all of the register accesses,
1252 * even though the details are similar on most chips.
1253 */
1254 static void qib_7220_clear_freeze(struct qib_devdata *dd)
1255 {
1256 /* disable error interrupts, to avoid confusion */
1257 qib_write_kreg(dd, kr_errmask, 0ULL);
1258
1259 /* also disable interrupts; errormask is sometimes overwriten */
1260 qib_7220_set_intr_state(dd, 0);
1261
1262 qib_cancel_sends(dd->pport);
1263
1264 /* clear the freeze, and be sure chip saw it */
1265 qib_write_kreg(dd, kr_control, dd->control);
1266 qib_read_kreg32(dd, kr_scratch);
1267
1268 /* force in-memory update now we are out of freeze */
1269 qib_force_pio_avail_update(dd);
1270
1271 /*
1272 * force new interrupt if any hwerr, error or interrupt bits are
1273 * still set, and clear "safe" send packet errors related to freeze
1274 * and cancelling sends. Re-enable error interrupts before possible
1275 * force of re-interrupt on pending interrupts.
1276 */
1277 qib_write_kreg(dd, kr_hwerrclear, 0ULL);
1278 qib_write_kreg(dd, kr_errclear, E_SPKT_ERRS_IGNORE);
1279 qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
1280 qib_7220_set_intr_state(dd, 1);
1281 }
1282
1283 /**
1284 * qib_7220_handle_hwerrors - display hardware errors.
1285 * @dd: the qlogic_ib device
1286 * @msg: the output buffer
1287 * @msgl: the size of the output buffer
1288 *
1289 * Use same msg buffer as regular errors to avoid excessive stack
1290 * use. Most hardware errors are catastrophic, but for right now,
1291 * we'll print them and continue. We reuse the same message buffer as
1292 * handle_7220_errors() to avoid excessive stack usage.
1293 */
1294 static void qib_7220_handle_hwerrors(struct qib_devdata *dd, char *msg,
1295 size_t msgl)
1296 {
1297 u64 hwerrs;
1298 u32 bits, ctrl;
1299 int isfatal = 0;
1300 char *bitsmsg;
1301 int log_idx;
1302
1303 hwerrs = qib_read_kreg64(dd, kr_hwerrstatus);
1304 if (!hwerrs)
1305 goto bail;
1306 if (hwerrs == ~0ULL) {
1307 qib_dev_err(dd, "Read of hardware error status failed "
1308 "(all bits set); ignoring\n");
1309 goto bail;
1310 }
1311 qib_stats.sps_hwerrs++;
1312
1313 /*
1314 * Always clear the error status register, except MEMBISTFAIL,
1315 * regardless of whether we continue or stop using the chip.
1316 * We want that set so we know it failed, even across driver reload.
1317 * We'll still ignore it in the hwerrmask. We do this partly for
1318 * diagnostics, but also for support.
1319 */
1320 qib_write_kreg(dd, kr_hwerrclear,
1321 hwerrs & ~HWE_MASK(PowerOnBISTFailed));
1322
1323 hwerrs &= dd->cspec->hwerrmask;
1324
1325 /* We log some errors to EEPROM, check if we have any of those. */
1326 for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
1327 if (hwerrs & dd->eep_st_masks[log_idx].hwerrs_to_log)
1328 qib_inc_eeprom_err(dd, log_idx, 1);
1329 if (hwerrs & ~(TXEMEMPARITYERR_PIOBUF | TXEMEMPARITYERR_PIOPBC |
1330 RXE_PARITY))
1331 qib_devinfo(dd->pcidev, "Hardware error: hwerr=0x%llx "
1332 "(cleared)\n", (unsigned long long) hwerrs);
1333
1334 if (hwerrs & ~IB_HWE_BITSEXTANT)
1335 qib_dev_err(dd, "hwerror interrupt with unknown errors "
1336 "%llx set\n", (unsigned long long)
1337 (hwerrs & ~IB_HWE_BITSEXTANT));
1338
1339 if (hwerrs & QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR)
1340 qib_sd7220_clr_ibpar(dd);
1341
1342 ctrl = qib_read_kreg32(dd, kr_control);
1343 if ((ctrl & QLOGIC_IB_C_FREEZEMODE) && !dd->diag_client) {
1344 /*
1345 * Parity errors in send memory are recoverable by h/w
1346 * just do housekeeping, exit freeze mode and continue.
1347 */
1348 if (hwerrs & (TXEMEMPARITYERR_PIOBUF |
1349 TXEMEMPARITYERR_PIOPBC)) {
1350 qib_7220_txe_recover(dd);
1351 hwerrs &= ~(TXEMEMPARITYERR_PIOBUF |
1352 TXEMEMPARITYERR_PIOPBC);
1353 }
1354 if (hwerrs)
1355 isfatal = 1;
1356 else
1357 qib_7220_clear_freeze(dd);
1358 }
1359
1360 *msg = '\0';
1361
1362 if (hwerrs & HWE_MASK(PowerOnBISTFailed)) {
1363 isfatal = 1;
1364 strlcat(msg, "[Memory BIST test failed, "
1365 "InfiniPath hardware unusable]", msgl);
1366 /* ignore from now on, so disable until driver reloaded */
1367 dd->cspec->hwerrmask &= ~HWE_MASK(PowerOnBISTFailed);
1368 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1369 }
1370
1371 qib_format_hwerrors(hwerrs, qib_7220_hwerror_msgs,
1372 ARRAY_SIZE(qib_7220_hwerror_msgs), msg, msgl);
1373
1374 bitsmsg = dd->cspec->bitsmsgbuf;
1375 if (hwerrs & (QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK <<
1376 QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT)) {
1377 bits = (u32) ((hwerrs >>
1378 QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT) &
1379 QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK);
1380 snprintf(bitsmsg, sizeof dd->cspec->bitsmsgbuf,
1381 "[PCIe Mem Parity Errs %x] ", bits);
1382 strlcat(msg, bitsmsg, msgl);
1383 }
1384
1385 #define _QIB_PLL_FAIL (QLOGIC_IB_HWE_COREPLL_FBSLIP | \
1386 QLOGIC_IB_HWE_COREPLL_RFSLIP)
1387
1388 if (hwerrs & _QIB_PLL_FAIL) {
1389 isfatal = 1;
1390 snprintf(bitsmsg, sizeof dd->cspec->bitsmsgbuf,
1391 "[PLL failed (%llx), InfiniPath hardware unusable]",
1392 (unsigned long long) hwerrs & _QIB_PLL_FAIL);
1393 strlcat(msg, bitsmsg, msgl);
1394 /* ignore from now on, so disable until driver reloaded */
1395 dd->cspec->hwerrmask &= ~(hwerrs & _QIB_PLL_FAIL);
1396 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1397 }
1398
1399 if (hwerrs & QLOGIC_IB_HWE_SERDESPLLFAILED) {
1400 /*
1401 * If it occurs, it is left masked since the eternal
1402 * interface is unused.
1403 */
1404 dd->cspec->hwerrmask &= ~QLOGIC_IB_HWE_SERDESPLLFAILED;
1405 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1406 }
1407
1408 qib_dev_err(dd, "%s hardware error\n", msg);
1409
1410 if (isfatal && !dd->diag_client) {
1411 qib_dev_err(dd, "Fatal Hardware Error, no longer"
1412 " usable, SN %.16s\n", dd->serial);
1413 /*
1414 * For /sys status file and user programs to print; if no
1415 * trailing brace is copied, we'll know it was truncated.
1416 */
1417 if (dd->freezemsg)
1418 snprintf(dd->freezemsg, dd->freezelen,
1419 "{%s}", msg);
1420 qib_disable_after_error(dd);
1421 }
1422 bail:;
1423 }
1424
1425 /**
1426 * qib_7220_init_hwerrors - enable hardware errors
1427 * @dd: the qlogic_ib device
1428 *
1429 * now that we have finished initializing everything that might reasonably
1430 * cause a hardware error, and cleared those errors bits as they occur,
1431 * we can enable hardware errors in the mask (potentially enabling
1432 * freeze mode), and enable hardware errors as errors (along with
1433 * everything else) in errormask
1434 */
1435 static void qib_7220_init_hwerrors(struct qib_devdata *dd)
1436 {
1437 u64 val;
1438 u64 extsval;
1439
1440 extsval = qib_read_kreg64(dd, kr_extstatus);
1441
1442 if (!(extsval & (QLOGIC_IB_EXTS_MEMBIST_ENDTEST |
1443 QLOGIC_IB_EXTS_MEMBIST_DISABLED)))
1444 qib_dev_err(dd, "MemBIST did not complete!\n");
1445 if (extsval & QLOGIC_IB_EXTS_MEMBIST_DISABLED)
1446 qib_devinfo(dd->pcidev, "MemBIST is disabled.\n");
1447
1448 val = ~0ULL; /* default to all hwerrors become interrupts, */
1449
1450 val &= ~QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR;
1451 dd->cspec->hwerrmask = val;
1452
1453 qib_write_kreg(dd, kr_hwerrclear, ~HWE_MASK(PowerOnBISTFailed));
1454 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1455
1456 /* clear all */
1457 qib_write_kreg(dd, kr_errclear, ~0ULL);
1458 /* enable errors that are masked, at least this first time. */
1459 qib_write_kreg(dd, kr_errmask, ~0ULL);
1460 dd->cspec->errormask = qib_read_kreg64(dd, kr_errmask);
1461 /* clear any interrupts up to this point (ints still not enabled) */
1462 qib_write_kreg(dd, kr_intclear, ~0ULL);
1463 }
1464
1465 /*
1466 * Disable and enable the armlaunch error. Used for PIO bandwidth testing
1467 * on chips that are count-based, rather than trigger-based. There is no
1468 * reference counting, but that's also fine, given the intended use.
1469 * Only chip-specific because it's all register accesses
1470 */
1471 static void qib_set_7220_armlaunch(struct qib_devdata *dd, u32 enable)
1472 {
1473 if (enable) {
1474 qib_write_kreg(dd, kr_errclear, ERR_MASK(SendPioArmLaunchErr));
1475 dd->cspec->errormask |= ERR_MASK(SendPioArmLaunchErr);
1476 } else
1477 dd->cspec->errormask &= ~ERR_MASK(SendPioArmLaunchErr);
1478 qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
1479 }
1480
1481 /*
1482 * Formerly took parameter <which> in pre-shifted,
1483 * pre-merged form with LinkCmd and LinkInitCmd
1484 * together, and assuming the zero was NOP.
1485 */
1486 static void qib_set_ib_7220_lstate(struct qib_pportdata *ppd, u16 linkcmd,
1487 u16 linitcmd)
1488 {
1489 u64 mod_wd;
1490 struct qib_devdata *dd = ppd->dd;
1491 unsigned long flags;
1492
1493 if (linitcmd == QLOGIC_IB_IBCC_LINKINITCMD_DISABLE) {
1494 /*
1495 * If we are told to disable, note that so link-recovery
1496 * code does not attempt to bring us back up.
1497 */
1498 spin_lock_irqsave(&ppd->lflags_lock, flags);
1499 ppd->lflags |= QIBL_IB_LINK_DISABLED;
1500 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1501 } else if (linitcmd || linkcmd == QLOGIC_IB_IBCC_LINKCMD_DOWN) {
1502 /*
1503 * Any other linkinitcmd will lead to LINKDOWN and then
1504 * to INIT (if all is well), so clear flag to let
1505 * link-recovery code attempt to bring us back up.
1506 */
1507 spin_lock_irqsave(&ppd->lflags_lock, flags);
1508 ppd->lflags &= ~QIBL_IB_LINK_DISABLED;
1509 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1510 }
1511
1512 mod_wd = (linkcmd << IBA7220_IBCC_LINKCMD_SHIFT) |
1513 (linitcmd << QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
1514
1515 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl | mod_wd);
1516 /* write to chip to prevent back-to-back writes of ibc reg */
1517 qib_write_kreg(dd, kr_scratch, 0);
1518 }
1519
1520 /*
1521 * All detailed interaction with the SerDes has been moved to qib_sd7220.c
1522 *
1523 * The portion of IBA7220-specific bringup_serdes() that actually deals with
1524 * registers and memory within the SerDes itself is qib_sd7220_init().
1525 */
1526
1527 /**
1528 * qib_7220_bringup_serdes - bring up the serdes
1529 * @ppd: physical port on the qlogic_ib device
1530 */
1531 static int qib_7220_bringup_serdes(struct qib_pportdata *ppd)
1532 {
1533 struct qib_devdata *dd = ppd->dd;
1534 u64 val, prev_val, guid, ibc;
1535 int ret = 0;
1536
1537 /* Put IBC in reset, sends disabled */
1538 dd->control &= ~QLOGIC_IB_C_LINKENABLE;
1539 qib_write_kreg(dd, kr_control, 0ULL);
1540
1541 if (qib_compat_ddr_negotiate) {
1542 ppd->cpspec->ibdeltainprog = 1;
1543 ppd->cpspec->ibsymsnap = read_7220_creg32(dd, cr_ibsymbolerr);
1544 ppd->cpspec->iblnkerrsnap =
1545 read_7220_creg32(dd, cr_iblinkerrrecov);
1546 }
1547
1548 /* flowcontrolwatermark is in units of KBytes */
1549 ibc = 0x5ULL << SYM_LSB(IBCCtrl, FlowCtrlWaterMark);
1550 /*
1551 * How often flowctrl sent. More or less in usecs; balance against
1552 * watermark value, so that in theory senders always get a flow
1553 * control update in time to not let the IB link go idle.
1554 */
1555 ibc |= 0x3ULL << SYM_LSB(IBCCtrl, FlowCtrlPeriod);
1556 /* max error tolerance */
1557 ibc |= 0xfULL << SYM_LSB(IBCCtrl, PhyerrThreshold);
1558 /* use "real" buffer space for */
1559 ibc |= 4ULL << SYM_LSB(IBCCtrl, CreditScale);
1560 /* IB credit flow control. */
1561 ibc |= 0xfULL << SYM_LSB(IBCCtrl, OverrunThreshold);
1562 /*
1563 * set initial max size pkt IBC will send, including ICRC; it's the
1564 * PIO buffer size in dwords, less 1; also see qib_set_mtu()
1565 */
1566 ibc |= ((u64)(ppd->ibmaxlen >> 2) + 1) << SYM_LSB(IBCCtrl, MaxPktLen);
1567 ppd->cpspec->ibcctrl = ibc; /* without linkcmd or linkinitcmd! */
1568
1569 /* initially come up waiting for TS1, without sending anything. */
1570 val = ppd->cpspec->ibcctrl | (QLOGIC_IB_IBCC_LINKINITCMD_DISABLE <<
1571 QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
1572 qib_write_kreg(dd, kr_ibcctrl, val);
1573
1574 if (!ppd->cpspec->ibcddrctrl) {
1575 /* not on re-init after reset */
1576 ppd->cpspec->ibcddrctrl = qib_read_kreg64(dd, kr_ibcddrctrl);
1577
1578 if (ppd->link_speed_enabled == (QIB_IB_SDR | QIB_IB_DDR))
1579 ppd->cpspec->ibcddrctrl |=
1580 IBA7220_IBC_SPEED_AUTONEG_MASK |
1581 IBA7220_IBC_IBTA_1_2_MASK;
1582 else
1583 ppd->cpspec->ibcddrctrl |=
1584 ppd->link_speed_enabled == QIB_IB_DDR ?
1585 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
1586 if ((ppd->link_width_enabled & (IB_WIDTH_1X | IB_WIDTH_4X)) ==
1587 (IB_WIDTH_1X | IB_WIDTH_4X))
1588 ppd->cpspec->ibcddrctrl |= IBA7220_IBC_WIDTH_AUTONEG;
1589 else
1590 ppd->cpspec->ibcddrctrl |=
1591 ppd->link_width_enabled == IB_WIDTH_4X ?
1592 IBA7220_IBC_WIDTH_4X_ONLY :
1593 IBA7220_IBC_WIDTH_1X_ONLY;
1594
1595 /* always enable these on driver reload, not sticky */
1596 ppd->cpspec->ibcddrctrl |=
1597 IBA7220_IBC_RXPOL_MASK << IBA7220_IBC_RXPOL_SHIFT;
1598 ppd->cpspec->ibcddrctrl |=
1599 IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
1600
1601 /* enable automatic lane reversal detection for receive */
1602 ppd->cpspec->ibcddrctrl |= IBA7220_IBC_LANE_REV_SUPPORTED;
1603 } else
1604 /* write to chip to prevent back-to-back writes of ibc reg */
1605 qib_write_kreg(dd, kr_scratch, 0);
1606
1607 qib_write_kreg(dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
1608 qib_write_kreg(dd, kr_scratch, 0);
1609
1610 qib_write_kreg(dd, kr_ncmodectrl, 0Ull);
1611 qib_write_kreg(dd, kr_scratch, 0);
1612
1613 ret = qib_sd7220_init(dd);
1614
1615 val = qib_read_kreg64(dd, kr_xgxs_cfg);
1616 prev_val = val;
1617 val |= QLOGIC_IB_XGXS_FC_SAFE;
1618 if (val != prev_val) {
1619 qib_write_kreg(dd, kr_xgxs_cfg, val);
1620 qib_read_kreg32(dd, kr_scratch);
1621 }
1622 if (val & QLOGIC_IB_XGXS_RESET)
1623 val &= ~QLOGIC_IB_XGXS_RESET;
1624 if (val != prev_val)
1625 qib_write_kreg(dd, kr_xgxs_cfg, val);
1626
1627 /* first time through, set port guid */
1628 if (!ppd->guid)
1629 ppd->guid = dd->base_guid;
1630 guid = be64_to_cpu(ppd->guid);
1631
1632 qib_write_kreg(dd, kr_hrtbt_guid, guid);
1633 if (!ret) {
1634 dd->control |= QLOGIC_IB_C_LINKENABLE;
1635 qib_write_kreg(dd, kr_control, dd->control);
1636 } else
1637 /* write to chip to prevent back-to-back writes of ibc reg */
1638 qib_write_kreg(dd, kr_scratch, 0);
1639 return ret;
1640 }
1641
1642 /**
1643 * qib_7220_quiet_serdes - set serdes to txidle
1644 * @ppd: physical port of the qlogic_ib device
1645 * Called when driver is being unloaded
1646 */
1647 static void qib_7220_quiet_serdes(struct qib_pportdata *ppd)
1648 {
1649 u64 val;
1650 struct qib_devdata *dd = ppd->dd;
1651 unsigned long flags;
1652
1653 /* disable IBC */
1654 dd->control &= ~QLOGIC_IB_C_LINKENABLE;
1655 qib_write_kreg(dd, kr_control,
1656 dd->control | QLOGIC_IB_C_FREEZEMODE);
1657
1658 ppd->cpspec->chase_end = 0;
1659 if (ppd->cpspec->chase_timer.data) /* if initted */
1660 del_timer_sync(&ppd->cpspec->chase_timer);
1661
1662 if (ppd->cpspec->ibsymdelta || ppd->cpspec->iblnkerrdelta ||
1663 ppd->cpspec->ibdeltainprog) {
1664 u64 diagc;
1665
1666 /* enable counter writes */
1667 diagc = qib_read_kreg64(dd, kr_hwdiagctrl);
1668 qib_write_kreg(dd, kr_hwdiagctrl,
1669 diagc | SYM_MASK(HwDiagCtrl, CounterWrEnable));
1670
1671 if (ppd->cpspec->ibsymdelta || ppd->cpspec->ibdeltainprog) {
1672 val = read_7220_creg32(dd, cr_ibsymbolerr);
1673 if (ppd->cpspec->ibdeltainprog)
1674 val -= val - ppd->cpspec->ibsymsnap;
1675 val -= ppd->cpspec->ibsymdelta;
1676 write_7220_creg(dd, cr_ibsymbolerr, val);
1677 }
1678 if (ppd->cpspec->iblnkerrdelta || ppd->cpspec->ibdeltainprog) {
1679 val = read_7220_creg32(dd, cr_iblinkerrrecov);
1680 if (ppd->cpspec->ibdeltainprog)
1681 val -= val - ppd->cpspec->iblnkerrsnap;
1682 val -= ppd->cpspec->iblnkerrdelta;
1683 write_7220_creg(dd, cr_iblinkerrrecov, val);
1684 }
1685
1686 /* and disable counter writes */
1687 qib_write_kreg(dd, kr_hwdiagctrl, diagc);
1688 }
1689 qib_set_ib_7220_lstate(ppd, 0, QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
1690
1691 spin_lock_irqsave(&ppd->lflags_lock, flags);
1692 ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
1693 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1694 wake_up(&ppd->cpspec->autoneg_wait);
1695 cancel_delayed_work_sync(&ppd->cpspec->autoneg_work);
1696
1697 shutdown_7220_relock_poll(ppd->dd);
1698 val = qib_read_kreg64(ppd->dd, kr_xgxs_cfg);
1699 val |= QLOGIC_IB_XGXS_RESET;
1700 qib_write_kreg(ppd->dd, kr_xgxs_cfg, val);
1701 }
1702
1703 /**
1704 * qib_setup_7220_setextled - set the state of the two external LEDs
1705 * @dd: the qlogic_ib device
1706 * @on: whether the link is up or not
1707 *
1708 * The exact combo of LEDs if on is true is determined by looking
1709 * at the ibcstatus.
1710 *
1711 * These LEDs indicate the physical and logical state of IB link.
1712 * For this chip (at least with recommended board pinouts), LED1
1713 * is Yellow (logical state) and LED2 is Green (physical state),
1714 *
1715 * Note: We try to match the Mellanox HCA LED behavior as best
1716 * we can. Green indicates physical link state is OK (something is
1717 * plugged in, and we can train).
1718 * Amber indicates the link is logically up (ACTIVE).
1719 * Mellanox further blinks the amber LED to indicate data packet
1720 * activity, but we have no hardware support for that, so it would
1721 * require waking up every 10-20 msecs and checking the counters
1722 * on the chip, and then turning the LED off if appropriate. That's
1723 * visible overhead, so not something we will do.
1724 *
1725 */
1726 static void qib_setup_7220_setextled(struct qib_pportdata *ppd, u32 on)
1727 {
1728 struct qib_devdata *dd = ppd->dd;
1729 u64 extctl, ledblink = 0, val, lst, ltst;
1730 unsigned long flags;
1731
1732 /*
1733 * The diags use the LED to indicate diag info, so we leave
1734 * the external LED alone when the diags are running.
1735 */
1736 if (dd->diag_client)
1737 return;
1738
1739 if (ppd->led_override) {
1740 ltst = (ppd->led_override & QIB_LED_PHYS) ?
1741 IB_PHYSPORTSTATE_LINKUP : IB_PHYSPORTSTATE_DISABLED,
1742 lst = (ppd->led_override & QIB_LED_LOG) ?
1743 IB_PORT_ACTIVE : IB_PORT_DOWN;
1744 } else if (on) {
1745 val = qib_read_kreg64(dd, kr_ibcstatus);
1746 ltst = qib_7220_phys_portstate(val);
1747 lst = qib_7220_iblink_state(val);
1748 } else {
1749 ltst = 0;
1750 lst = 0;
1751 }
1752
1753 spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
1754 extctl = dd->cspec->extctrl & ~(SYM_MASK(EXTCtrl, LEDPriPortGreenOn) |
1755 SYM_MASK(EXTCtrl, LEDPriPortYellowOn));
1756 if (ltst == IB_PHYSPORTSTATE_LINKUP) {
1757 extctl |= SYM_MASK(EXTCtrl, LEDPriPortGreenOn);
1758 /*
1759 * counts are in chip clock (4ns) periods.
1760 * This is 1/16 sec (66.6ms) on,
1761 * 3/16 sec (187.5 ms) off, with packets rcvd
1762 */
1763 ledblink = ((66600 * 1000UL / 4) << IBA7220_LEDBLINK_ON_SHIFT)
1764 | ((187500 * 1000UL / 4) << IBA7220_LEDBLINK_OFF_SHIFT);
1765 }
1766 if (lst == IB_PORT_ACTIVE)
1767 extctl |= SYM_MASK(EXTCtrl, LEDPriPortYellowOn);
1768 dd->cspec->extctrl = extctl;
1769 qib_write_kreg(dd, kr_extctrl, extctl);
1770 spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
1771
1772 if (ledblink) /* blink the LED on packet receive */
1773 qib_write_kreg(dd, kr_rcvpktledcnt, ledblink);
1774 }
1775
1776 static void qib_7220_free_irq(struct qib_devdata *dd)
1777 {
1778 if (dd->cspec->irq) {
1779 free_irq(dd->cspec->irq, dd);
1780 dd->cspec->irq = 0;
1781 }
1782 qib_nomsi(dd);
1783 }
1784
1785 /*
1786 * qib_setup_7220_cleanup - clean up any per-chip chip-specific stuff
1787 * @dd: the qlogic_ib device
1788 *
1789 * This is called during driver unload.
1790 *
1791 */
1792 static void qib_setup_7220_cleanup(struct qib_devdata *dd)
1793 {
1794 qib_7220_free_irq(dd);
1795 kfree(dd->cspec->cntrs);
1796 kfree(dd->cspec->portcntrs);
1797 }
1798
1799 /*
1800 * This is only called for SDmaInt.
1801 * SDmaDisabled is handled on the error path.
1802 */
1803 static void sdma_7220_intr(struct qib_pportdata *ppd, u64 istat)
1804 {
1805 unsigned long flags;
1806
1807 spin_lock_irqsave(&ppd->sdma_lock, flags);
1808
1809 switch (ppd->sdma_state.current_state) {
1810 case qib_sdma_state_s00_hw_down:
1811 break;
1812
1813 case qib_sdma_state_s10_hw_start_up_wait:
1814 __qib_sdma_process_event(ppd, qib_sdma_event_e20_hw_started);
1815 break;
1816
1817 case qib_sdma_state_s20_idle:
1818 break;
1819
1820 case qib_sdma_state_s30_sw_clean_up_wait:
1821 break;
1822
1823 case qib_sdma_state_s40_hw_clean_up_wait:
1824 break;
1825
1826 case qib_sdma_state_s50_hw_halt_wait:
1827 __qib_sdma_process_event(ppd, qib_sdma_event_e60_hw_halted);
1828 break;
1829
1830 case qib_sdma_state_s99_running:
1831 /* too chatty to print here */
1832 __qib_sdma_intr(ppd);
1833 break;
1834 }
1835 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
1836 }
1837
1838 static void qib_wantpiobuf_7220_intr(struct qib_devdata *dd, u32 needint)
1839 {
1840 unsigned long flags;
1841
1842 spin_lock_irqsave(&dd->sendctrl_lock, flags);
1843 if (needint) {
1844 if (!(dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
1845 goto done;
1846 /*
1847 * blip the availupd off, next write will be on, so
1848 * we ensure an avail update, regardless of threshold or
1849 * buffers becoming free, whenever we want an interrupt
1850 */
1851 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl &
1852 ~SYM_MASK(SendCtrl, SendBufAvailUpd));
1853 qib_write_kreg(dd, kr_scratch, 0ULL);
1854 dd->sendctrl |= SYM_MASK(SendCtrl, SendIntBufAvail);
1855 } else
1856 dd->sendctrl &= ~SYM_MASK(SendCtrl, SendIntBufAvail);
1857 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
1858 qib_write_kreg(dd, kr_scratch, 0ULL);
1859 done:
1860 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
1861 }
1862
1863 /*
1864 * Handle errors and unusual events first, separate function
1865 * to improve cache hits for fast path interrupt handling.
1866 */
1867 static noinline void unlikely_7220_intr(struct qib_devdata *dd, u64 istat)
1868 {
1869 if (unlikely(istat & ~QLOGIC_IB_I_BITSEXTANT))
1870 qib_dev_err(dd,
1871 "interrupt with unknown interrupts %Lx set\n",
1872 istat & ~QLOGIC_IB_I_BITSEXTANT);
1873
1874 if (istat & QLOGIC_IB_I_GPIO) {
1875 u32 gpiostatus;
1876
1877 /*
1878 * Boards for this chip currently don't use GPIO interrupts,
1879 * so clear by writing GPIOstatus to GPIOclear, and complain
1880 * to alert developer. To avoid endless repeats, clear
1881 * the bits in the mask, since there is some kind of
1882 * programming error or chip problem.
1883 */
1884 gpiostatus = qib_read_kreg32(dd, kr_gpio_status);
1885 /*
1886 * In theory, writing GPIOstatus to GPIOclear could
1887 * have a bad side-effect on some diagnostic that wanted
1888 * to poll for a status-change, but the various shadows
1889 * make that problematic at best. Diags will just suppress
1890 * all GPIO interrupts during such tests.
1891 */
1892 qib_write_kreg(dd, kr_gpio_clear, gpiostatus);
1893
1894 if (gpiostatus) {
1895 const u32 mask = qib_read_kreg32(dd, kr_gpio_mask);
1896 u32 gpio_irq = mask & gpiostatus;
1897
1898 /*
1899 * A bit set in status and (chip) Mask register
1900 * would cause an interrupt. Since we are not
1901 * expecting any, report it. Also check that the
1902 * chip reflects our shadow, report issues,
1903 * and refresh from the shadow.
1904 */
1905 /*
1906 * Clear any troublemakers, and update chip
1907 * from shadow
1908 */
1909 dd->cspec->gpio_mask &= ~gpio_irq;
1910 qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
1911 }
1912 }
1913
1914 if (istat & QLOGIC_IB_I_ERROR) {
1915 u64 estat;
1916
1917 qib_stats.sps_errints++;
1918 estat = qib_read_kreg64(dd, kr_errstatus);
1919 if (!estat)
1920 qib_devinfo(dd->pcidev, "error interrupt (%Lx), "
1921 "but no error bits set!\n", istat);
1922 else
1923 handle_7220_errors(dd, estat);
1924 }
1925 }
1926
1927 static irqreturn_t qib_7220intr(int irq, void *data)
1928 {
1929 struct qib_devdata *dd = data;
1930 irqreturn_t ret;
1931 u64 istat;
1932 u64 ctxtrbits;
1933 u64 rmask;
1934 unsigned i;
1935
1936 if ((dd->flags & (QIB_PRESENT | QIB_BADINTR)) != QIB_PRESENT) {
1937 /*
1938 * This return value is not great, but we do not want the
1939 * interrupt core code to remove our interrupt handler
1940 * because we don't appear to be handling an interrupt
1941 * during a chip reset.
1942 */
1943 ret = IRQ_HANDLED;
1944 goto bail;
1945 }
1946
1947 istat = qib_read_kreg64(dd, kr_intstatus);
1948
1949 if (unlikely(!istat)) {
1950 ret = IRQ_NONE; /* not our interrupt, or already handled */
1951 goto bail;
1952 }
1953 if (unlikely(istat == -1)) {
1954 qib_bad_intrstatus(dd);
1955 /* don't know if it was our interrupt or not */
1956 ret = IRQ_NONE;
1957 goto bail;
1958 }
1959
1960 qib_stats.sps_ints++;
1961 if (dd->int_counter != (u32) -1)
1962 dd->int_counter++;
1963
1964 if (unlikely(istat & (~QLOGIC_IB_I_BITSEXTANT |
1965 QLOGIC_IB_I_GPIO | QLOGIC_IB_I_ERROR)))
1966 unlikely_7220_intr(dd, istat);
1967
1968 /*
1969 * Clear the interrupt bits we found set, relatively early, so we
1970 * "know" know the chip will have seen this by the time we process
1971 * the queue, and will re-interrupt if necessary. The processor
1972 * itself won't take the interrupt again until we return.
1973 */
1974 qib_write_kreg(dd, kr_intclear, istat);
1975
1976 /*
1977 * Handle kernel receive queues before checking for pio buffers
1978 * available since receives can overflow; piobuf waiters can afford
1979 * a few extra cycles, since they were waiting anyway.
1980 */
1981 ctxtrbits = istat &
1982 ((QLOGIC_IB_I_RCVAVAIL_MASK << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
1983 (QLOGIC_IB_I_RCVURG_MASK << QLOGIC_IB_I_RCVURG_SHIFT));
1984 if (ctxtrbits) {
1985 rmask = (1ULL << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
1986 (1ULL << QLOGIC_IB_I_RCVURG_SHIFT);
1987 for (i = 0; i < dd->first_user_ctxt; i++) {
1988 if (ctxtrbits & rmask) {
1989 ctxtrbits &= ~rmask;
1990 qib_kreceive(dd->rcd[i], NULL, NULL);
1991 }
1992 rmask <<= 1;
1993 }
1994 if (ctxtrbits) {
1995 ctxtrbits =
1996 (ctxtrbits >> QLOGIC_IB_I_RCVAVAIL_SHIFT) |
1997 (ctxtrbits >> QLOGIC_IB_I_RCVURG_SHIFT);
1998 qib_handle_urcv(dd, ctxtrbits);
1999 }
2000 }
2001
2002 /* only call for SDmaInt */
2003 if (istat & QLOGIC_IB_I_SDMAINT)
2004 sdma_7220_intr(dd->pport, istat);
2005
2006 if ((istat & QLOGIC_IB_I_SPIOBUFAVAIL) && (dd->flags & QIB_INITTED))
2007 qib_ib_piobufavail(dd);
2008
2009 ret = IRQ_HANDLED;
2010 bail:
2011 return ret;
2012 }
2013
2014 /*
2015 * Set up our chip-specific interrupt handler.
2016 * The interrupt type has already been setup, so
2017 * we just need to do the registration and error checking.
2018 * If we are using MSI interrupts, we may fall back to
2019 * INTx later, if the interrupt handler doesn't get called
2020 * within 1/2 second (see verify_interrupt()).
2021 */
2022 static void qib_setup_7220_interrupt(struct qib_devdata *dd)
2023 {
2024 if (!dd->cspec->irq)
2025 qib_dev_err(dd, "irq is 0, BIOS error? Interrupts won't "
2026 "work\n");
2027 else {
2028 int ret = request_irq(dd->cspec->irq, qib_7220intr,
2029 dd->msi_lo ? 0 : IRQF_SHARED,
2030 QIB_DRV_NAME, dd);
2031
2032 if (ret)
2033 qib_dev_err(dd, "Couldn't setup %s interrupt "
2034 "(irq=%d): %d\n", dd->msi_lo ?
2035 "MSI" : "INTx", dd->cspec->irq, ret);
2036 }
2037 }
2038
2039 /**
2040 * qib_7220_boardname - fill in the board name
2041 * @dd: the qlogic_ib device
2042 *
2043 * info is based on the board revision register
2044 */
2045 static void qib_7220_boardname(struct qib_devdata *dd)
2046 {
2047 char *n;
2048 u32 boardid, namelen;
2049
2050 boardid = SYM_FIELD(dd->revision, Revision,
2051 BoardID);
2052
2053 switch (boardid) {
2054 case 1:
2055 n = "InfiniPath_QLE7240";
2056 break;
2057 case 2:
2058 n = "InfiniPath_QLE7280";
2059 break;
2060 default:
2061 qib_dev_err(dd, "Unknown 7220 board with ID %u\n", boardid);
2062 n = "Unknown_InfiniPath_7220";
2063 break;
2064 }
2065
2066 namelen = strlen(n) + 1;
2067 dd->boardname = kmalloc(namelen, GFP_KERNEL);
2068 if (!dd->boardname)
2069 qib_dev_err(dd, "Failed allocation for board name: %s\n", n);
2070 else
2071 snprintf(dd->boardname, namelen, "%s", n);
2072
2073 if (dd->majrev != 5 || !dd->minrev || dd->minrev > 2)
2074 qib_dev_err(dd, "Unsupported InfiniPath hardware "
2075 "revision %u.%u!\n",
2076 dd->majrev, dd->minrev);
2077
2078 snprintf(dd->boardversion, sizeof(dd->boardversion),
2079 "ChipABI %u.%u, %s, InfiniPath%u %u.%u, SW Compat %u\n",
2080 QIB_CHIP_VERS_MAJ, QIB_CHIP_VERS_MIN, dd->boardname,
2081 (unsigned)SYM_FIELD(dd->revision, Revision_R, Arch),
2082 dd->majrev, dd->minrev,
2083 (unsigned)SYM_FIELD(dd->revision, Revision_R, SW));
2084 }
2085
2086 /*
2087 * This routine sleeps, so it can only be called from user context, not
2088 * from interrupt context.
2089 */
2090 static int qib_setup_7220_reset(struct qib_devdata *dd)
2091 {
2092 u64 val;
2093 int i;
2094 int ret;
2095 u16 cmdval;
2096 u8 int_line, clinesz;
2097 unsigned long flags;
2098
2099 qib_pcie_getcmd(dd, &cmdval, &int_line, &clinesz);
2100
2101 /* Use dev_err so it shows up in logs, etc. */
2102 qib_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->unit);
2103
2104 /* no interrupts till re-initted */
2105 qib_7220_set_intr_state(dd, 0);
2106
2107 dd->pport->cpspec->ibdeltainprog = 0;
2108 dd->pport->cpspec->ibsymdelta = 0;
2109 dd->pport->cpspec->iblnkerrdelta = 0;
2110
2111 /*
2112 * Keep chip from being accessed until we are ready. Use
2113 * writeq() directly, to allow the write even though QIB_PRESENT
2114 * isn't set.
2115 */
2116 dd->flags &= ~(QIB_INITTED | QIB_PRESENT);
2117 dd->int_counter = 0; /* so we check interrupts work again */
2118 val = dd->control | QLOGIC_IB_C_RESET;
2119 writeq(val, &dd->kregbase[kr_control]);
2120 mb(); /* prevent compiler reordering around actual reset */
2121
2122 for (i = 1; i <= 5; i++) {
2123 /*
2124 * Allow MBIST, etc. to complete; longer on each retry.
2125 * We sometimes get machine checks from bus timeout if no
2126 * response, so for now, make it *really* long.
2127 */
2128 msleep(1000 + (1 + i) * 2000);
2129
2130 qib_pcie_reenable(dd, cmdval, int_line, clinesz);
2131
2132 /*
2133 * Use readq directly, so we don't need to mark it as PRESENT
2134 * until we get a successful indication that all is well.
2135 */
2136 val = readq(&dd->kregbase[kr_revision]);
2137 if (val == dd->revision) {
2138 dd->flags |= QIB_PRESENT; /* it's back */
2139 ret = qib_reinit_intr(dd);
2140 goto bail;
2141 }
2142 }
2143 ret = 0; /* failed */
2144
2145 bail:
2146 if (ret) {
2147 if (qib_pcie_params(dd, dd->lbus_width, NULL, NULL))
2148 qib_dev_err(dd, "Reset failed to setup PCIe or "
2149 "interrupts; continuing anyway\n");
2150
2151 /* hold IBC in reset, no sends, etc till later */
2152 qib_write_kreg(dd, kr_control, 0ULL);
2153
2154 /* clear the reset error, init error/hwerror mask */
2155 qib_7220_init_hwerrors(dd);
2156
2157 /* do setup similar to speed or link-width changes */
2158 if (dd->pport->cpspec->ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK)
2159 dd->cspec->presets_needed = 1;
2160 spin_lock_irqsave(&dd->pport->lflags_lock, flags);
2161 dd->pport->lflags |= QIBL_IB_FORCE_NOTIFY;
2162 dd->pport->lflags &= ~QIBL_IB_AUTONEG_FAILED;
2163 spin_unlock_irqrestore(&dd->pport->lflags_lock, flags);
2164 }
2165
2166 return ret;
2167 }
2168
2169 /**
2170 * qib_7220_put_tid - write a TID to the chip
2171 * @dd: the qlogic_ib device
2172 * @tidptr: pointer to the expected TID (in chip) to update
2173 * @tidtype: 0 for eager, 1 for expected
2174 * @pa: physical address of in memory buffer; tidinvalid if freeing
2175 */
2176 static void qib_7220_put_tid(struct qib_devdata *dd, u64 __iomem *tidptr,
2177 u32 type, unsigned long pa)
2178 {
2179 if (pa != dd->tidinvalid) {
2180 u64 chippa = pa >> IBA7220_TID_PA_SHIFT;
2181
2182 /* paranoia checks */
2183 if (pa != (chippa << IBA7220_TID_PA_SHIFT)) {
2184 qib_dev_err(dd, "Physaddr %lx not 2KB aligned!\n",
2185 pa);
2186 return;
2187 }
2188 if (chippa >= (1UL << IBA7220_TID_SZ_SHIFT)) {
2189 qib_dev_err(dd, "Physical page address 0x%lx "
2190 "larger than supported\n", pa);
2191 return;
2192 }
2193
2194 if (type == RCVHQ_RCV_TYPE_EAGER)
2195 chippa |= dd->tidtemplate;
2196 else /* for now, always full 4KB page */
2197 chippa |= IBA7220_TID_SZ_4K;
2198 pa = chippa;
2199 }
2200 writeq(pa, tidptr);
2201 mmiowb();
2202 }
2203
2204 /**
2205 * qib_7220_clear_tids - clear all TID entries for a ctxt, expected and eager
2206 * @dd: the qlogic_ib device
2207 * @ctxt: the ctxt
2208 *
2209 * clear all TID entries for a ctxt, expected and eager.
2210 * Used from qib_close(). On this chip, TIDs are only 32 bits,
2211 * not 64, but they are still on 64 bit boundaries, so tidbase
2212 * is declared as u64 * for the pointer math, even though we write 32 bits
2213 */
2214 static void qib_7220_clear_tids(struct qib_devdata *dd,
2215 struct qib_ctxtdata *rcd)
2216 {
2217 u64 __iomem *tidbase;
2218 unsigned long tidinv;
2219 u32 ctxt;
2220 int i;
2221
2222 if (!dd->kregbase || !rcd)
2223 return;
2224
2225 ctxt = rcd->ctxt;
2226
2227 tidinv = dd->tidinvalid;
2228 tidbase = (u64 __iomem *)
2229 ((char __iomem *)(dd->kregbase) +
2230 dd->rcvtidbase +
2231 ctxt * dd->rcvtidcnt * sizeof(*tidbase));
2232
2233 for (i = 0; i < dd->rcvtidcnt; i++)
2234 qib_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
2235 tidinv);
2236
2237 tidbase = (u64 __iomem *)
2238 ((char __iomem *)(dd->kregbase) +
2239 dd->rcvegrbase +
2240 rcd->rcvegr_tid_base * sizeof(*tidbase));
2241
2242 for (i = 0; i < rcd->rcvegrcnt; i++)
2243 qib_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
2244 tidinv);
2245 }
2246
2247 /**
2248 * qib_7220_tidtemplate - setup constants for TID updates
2249 * @dd: the qlogic_ib device
2250 *
2251 * We setup stuff that we use a lot, to avoid calculating each time
2252 */
2253 static void qib_7220_tidtemplate(struct qib_devdata *dd)
2254 {
2255 if (dd->rcvegrbufsize == 2048)
2256 dd->tidtemplate = IBA7220_TID_SZ_2K;
2257 else if (dd->rcvegrbufsize == 4096)
2258 dd->tidtemplate = IBA7220_TID_SZ_4K;
2259 dd->tidinvalid = 0;
2260 }
2261
2262 /**
2263 * qib_init_7220_get_base_info - set chip-specific flags for user code
2264 * @rcd: the qlogic_ib ctxt
2265 * @kbase: qib_base_info pointer
2266 *
2267 * We set the PCIE flag because the lower bandwidth on PCIe vs
2268 * HyperTransport can affect some user packet algorithims.
2269 */
2270 static int qib_7220_get_base_info(struct qib_ctxtdata *rcd,
2271 struct qib_base_info *kinfo)
2272 {
2273 kinfo->spi_runtime_flags |= QIB_RUNTIME_PCIE |
2274 QIB_RUNTIME_NODMA_RTAIL | QIB_RUNTIME_SDMA;
2275
2276 if (rcd->dd->flags & QIB_USE_SPCL_TRIG)
2277 kinfo->spi_runtime_flags |= QIB_RUNTIME_SPECIAL_TRIGGER;
2278
2279 return 0;
2280 }
2281
2282 static struct qib_message_header *
2283 qib_7220_get_msgheader(struct qib_devdata *dd, __le32 *rhf_addr)
2284 {
2285 u32 offset = qib_hdrget_offset(rhf_addr);
2286
2287 return (struct qib_message_header *)
2288 (rhf_addr - dd->rhf_offset + offset);
2289 }
2290
2291 static void qib_7220_config_ctxts(struct qib_devdata *dd)
2292 {
2293 unsigned long flags;
2294 u32 nchipctxts;
2295
2296 nchipctxts = qib_read_kreg32(dd, kr_portcnt);
2297 dd->cspec->numctxts = nchipctxts;
2298 if (qib_n_krcv_queues > 1) {
2299 dd->qpn_mask = 0x3e;
2300 dd->first_user_ctxt = qib_n_krcv_queues * dd->num_pports;
2301 if (dd->first_user_ctxt > nchipctxts)
2302 dd->first_user_ctxt = nchipctxts;
2303 } else
2304 dd->first_user_ctxt = dd->num_pports;
2305 dd->n_krcv_queues = dd->first_user_ctxt;
2306
2307 if (!qib_cfgctxts) {
2308 int nctxts = dd->first_user_ctxt + num_online_cpus();
2309
2310 if (nctxts <= 5)
2311 dd->ctxtcnt = 5;
2312 else if (nctxts <= 9)
2313 dd->ctxtcnt = 9;
2314 else if (nctxts <= nchipctxts)
2315 dd->ctxtcnt = nchipctxts;
2316 } else if (qib_cfgctxts <= nchipctxts)
2317 dd->ctxtcnt = qib_cfgctxts;
2318 if (!dd->ctxtcnt) /* none of the above, set to max */
2319 dd->ctxtcnt = nchipctxts;
2320
2321 /*
2322 * Chip can be configured for 5, 9, or 17 ctxts, and choice
2323 * affects number of eager TIDs per ctxt (1K, 2K, 4K).
2324 * Lock to be paranoid about later motion, etc.
2325 */
2326 spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
2327 if (dd->ctxtcnt > 9)
2328 dd->rcvctrl |= 2ULL << IBA7220_R_CTXTCFG_SHIFT;
2329 else if (dd->ctxtcnt > 5)
2330 dd->rcvctrl |= 1ULL << IBA7220_R_CTXTCFG_SHIFT;
2331 /* else configure for default 5 receive ctxts */
2332 if (dd->qpn_mask)
2333 dd->rcvctrl |= 1ULL << QIB_7220_RcvCtrl_RcvQPMapEnable_LSB;
2334 qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
2335 spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
2336
2337 /* kr_rcvegrcnt changes based on the number of contexts enabled */
2338 dd->cspec->rcvegrcnt = qib_read_kreg32(dd, kr_rcvegrcnt);
2339 dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt, IBA7220_KRCVEGRCNT);
2340 }
2341
2342 static int qib_7220_get_ib_cfg(struct qib_pportdata *ppd, int which)
2343 {
2344 int lsb, ret = 0;
2345 u64 maskr; /* right-justified mask */
2346
2347 switch (which) {
2348 case QIB_IB_CFG_LWID_ENB: /* Get allowed Link-width */
2349 ret = ppd->link_width_enabled;
2350 goto done;
2351
2352 case QIB_IB_CFG_LWID: /* Get currently active Link-width */
2353 ret = ppd->link_width_active;
2354 goto done;
2355
2356 case QIB_IB_CFG_SPD_ENB: /* Get allowed Link speeds */
2357 ret = ppd->link_speed_enabled;
2358 goto done;
2359
2360 case QIB_IB_CFG_SPD: /* Get current Link spd */
2361 ret = ppd->link_speed_active;
2362 goto done;
2363
2364 case QIB_IB_CFG_RXPOL_ENB: /* Get Auto-RX-polarity enable */
2365 lsb = IBA7220_IBC_RXPOL_SHIFT;
2366 maskr = IBA7220_IBC_RXPOL_MASK;
2367 break;
2368
2369 case QIB_IB_CFG_LREV_ENB: /* Get Auto-Lane-reversal enable */
2370 lsb = IBA7220_IBC_LREV_SHIFT;
2371 maskr = IBA7220_IBC_LREV_MASK;
2372 break;
2373
2374 case QIB_IB_CFG_LINKLATENCY:
2375 ret = qib_read_kreg64(ppd->dd, kr_ibcddrstatus)
2376 & IBA7220_DDRSTAT_LINKLAT_MASK;
2377 goto done;
2378
2379 case QIB_IB_CFG_OP_VLS:
2380 ret = ppd->vls_operational;
2381 goto done;
2382
2383 case QIB_IB_CFG_VL_HIGH_CAP:
2384 ret = 0;
2385 goto done;
2386
2387 case QIB_IB_CFG_VL_LOW_CAP:
2388 ret = 0;
2389 goto done;
2390
2391 case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
2392 ret = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2393 OverrunThreshold);
2394 goto done;
2395
2396 case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
2397 ret = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2398 PhyerrThreshold);
2399 goto done;
2400
2401 case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
2402 /* will only take effect when the link state changes */
2403 ret = (ppd->cpspec->ibcctrl &
2404 SYM_MASK(IBCCtrl, LinkDownDefaultState)) ?
2405 IB_LINKINITCMD_SLEEP : IB_LINKINITCMD_POLL;
2406 goto done;
2407
2408 case QIB_IB_CFG_HRTBT: /* Get Heartbeat off/enable/auto */
2409 lsb = IBA7220_IBC_HRTBT_SHIFT;
2410 maskr = IBA7220_IBC_HRTBT_MASK;
2411 break;
2412
2413 case QIB_IB_CFG_PMA_TICKS:
2414 /*
2415 * 0x00 = 10x link transfer rate or 4 nsec. for 2.5Gbs
2416 * Since the clock is always 250MHz, the value is 1 or 0.
2417 */
2418 ret = (ppd->link_speed_active == QIB_IB_DDR);
2419 goto done;
2420
2421 default:
2422 ret = -EINVAL;
2423 goto done;
2424 }
2425 ret = (int)((ppd->cpspec->ibcddrctrl >> lsb) & maskr);
2426 done:
2427 return ret;
2428 }
2429
2430 static int qib_7220_set_ib_cfg(struct qib_pportdata *ppd, int which, u32 val)
2431 {
2432 struct qib_devdata *dd = ppd->dd;
2433 u64 maskr; /* right-justified mask */
2434 int lsb, ret = 0, setforce = 0;
2435 u16 lcmd, licmd;
2436 unsigned long flags;
2437
2438 switch (which) {
2439 case QIB_IB_CFG_LIDLMC:
2440 /*
2441 * Set LID and LMC. Combined to avoid possible hazard
2442 * caller puts LMC in 16MSbits, DLID in 16LSbits of val
2443 */
2444 lsb = IBA7220_IBC_DLIDLMC_SHIFT;
2445 maskr = IBA7220_IBC_DLIDLMC_MASK;
2446 break;
2447
2448 case QIB_IB_CFG_LWID_ENB: /* set allowed Link-width */
2449 /*
2450 * As with speed, only write the actual register if
2451 * the link is currently down, otherwise takes effect
2452 * on next link change.
2453 */
2454 ppd->link_width_enabled = val;
2455 if (!(ppd->lflags & QIBL_LINKDOWN))
2456 goto bail;
2457 /*
2458 * We set the QIBL_IB_FORCE_NOTIFY bit so updown
2459 * will get called because we want update
2460 * link_width_active, and the change may not take
2461 * effect for some time (if we are in POLL), so this
2462 * flag will force the updown routine to be called
2463 * on the next ibstatuschange down interrupt, even
2464 * if it's not an down->up transition.
2465 */
2466 val--; /* convert from IB to chip */
2467 maskr = IBA7220_IBC_WIDTH_MASK;
2468 lsb = IBA7220_IBC_WIDTH_SHIFT;
2469 setforce = 1;
2470 spin_lock_irqsave(&ppd->lflags_lock, flags);
2471 ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
2472 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2473 break;
2474
2475 case QIB_IB_CFG_SPD_ENB: /* set allowed Link speeds */
2476 /*
2477 * If we turn off IB1.2, need to preset SerDes defaults,
2478 * but not right now. Set a flag for the next time
2479 * we command the link down. As with width, only write the
2480 * actual register if the link is currently down, otherwise
2481 * takes effect on next link change. Since setting is being
2482 * explicitly requested (via MAD or sysfs), clear autoneg
2483 * failure status if speed autoneg is enabled.
2484 */
2485 ppd->link_speed_enabled = val;
2486 if ((ppd->cpspec->ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK) &&
2487 !(val & (val - 1)))
2488 dd->cspec->presets_needed = 1;
2489 if (!(ppd->lflags & QIBL_LINKDOWN))
2490 goto bail;
2491 /*
2492 * We set the QIBL_IB_FORCE_NOTIFY bit so updown
2493 * will get called because we want update
2494 * link_speed_active, and the change may not take
2495 * effect for some time (if we are in POLL), so this
2496 * flag will force the updown routine to be called
2497 * on the next ibstatuschange down interrupt, even
2498 * if it's not an down->up transition.
2499 */
2500 if (val == (QIB_IB_SDR | QIB_IB_DDR)) {
2501 val = IBA7220_IBC_SPEED_AUTONEG_MASK |
2502 IBA7220_IBC_IBTA_1_2_MASK;
2503 spin_lock_irqsave(&ppd->lflags_lock, flags);
2504 ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
2505 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2506 } else
2507 val = val == QIB_IB_DDR ?
2508 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
2509 maskr = IBA7220_IBC_SPEED_AUTONEG_MASK |
2510 IBA7220_IBC_IBTA_1_2_MASK;
2511 /* IBTA 1.2 mode + speed bits are contiguous */
2512 lsb = SYM_LSB(IBCDDRCtrl, IB_ENHANCED_MODE);
2513 setforce = 1;
2514 break;
2515
2516 case QIB_IB_CFG_RXPOL_ENB: /* set Auto-RX-polarity enable */
2517 lsb = IBA7220_IBC_RXPOL_SHIFT;
2518 maskr = IBA7220_IBC_RXPOL_MASK;
2519 break;
2520
2521 case QIB_IB_CFG_LREV_ENB: /* set Auto-Lane-reversal enable */
2522 lsb = IBA7220_IBC_LREV_SHIFT;
2523 maskr = IBA7220_IBC_LREV_MASK;
2524 break;
2525
2526 case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
2527 maskr = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2528 OverrunThreshold);
2529 if (maskr != val) {
2530 ppd->cpspec->ibcctrl &=
2531 ~SYM_MASK(IBCCtrl, OverrunThreshold);
2532 ppd->cpspec->ibcctrl |= (u64) val <<
2533 SYM_LSB(IBCCtrl, OverrunThreshold);
2534 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2535 qib_write_kreg(dd, kr_scratch, 0);
2536 }
2537 goto bail;
2538
2539 case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
2540 maskr = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2541 PhyerrThreshold);
2542 if (maskr != val) {
2543 ppd->cpspec->ibcctrl &=
2544 ~SYM_MASK(IBCCtrl, PhyerrThreshold);
2545 ppd->cpspec->ibcctrl |= (u64) val <<
2546 SYM_LSB(IBCCtrl, PhyerrThreshold);
2547 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2548 qib_write_kreg(dd, kr_scratch, 0);
2549 }
2550 goto bail;
2551
2552 case QIB_IB_CFG_PKEYS: /* update pkeys */
2553 maskr = (u64) ppd->pkeys[0] | ((u64) ppd->pkeys[1] << 16) |
2554 ((u64) ppd->pkeys[2] << 32) |
2555 ((u64) ppd->pkeys[3] << 48);
2556 qib_write_kreg(dd, kr_partitionkey, maskr);
2557 goto bail;
2558
2559 case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
2560 /* will only take effect when the link state changes */
2561 if (val == IB_LINKINITCMD_POLL)
2562 ppd->cpspec->ibcctrl &=
2563 ~SYM_MASK(IBCCtrl, LinkDownDefaultState);
2564 else /* SLEEP */
2565 ppd->cpspec->ibcctrl |=
2566 SYM_MASK(IBCCtrl, LinkDownDefaultState);
2567 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2568 qib_write_kreg(dd, kr_scratch, 0);
2569 goto bail;
2570
2571 case QIB_IB_CFG_MTU: /* update the MTU in IBC */
2572 /*
2573 * Update our housekeeping variables, and set IBC max
2574 * size, same as init code; max IBC is max we allow in
2575 * buffer, less the qword pbc, plus 1 for ICRC, in dwords
2576 * Set even if it's unchanged, print debug message only
2577 * on changes.
2578 */
2579 val = (ppd->ibmaxlen >> 2) + 1;
2580 ppd->cpspec->ibcctrl &= ~SYM_MASK(IBCCtrl, MaxPktLen);
2581 ppd->cpspec->ibcctrl |= (u64)val << SYM_LSB(IBCCtrl, MaxPktLen);
2582 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2583 qib_write_kreg(dd, kr_scratch, 0);
2584 goto bail;
2585
2586 case QIB_IB_CFG_LSTATE: /* set the IB link state */
2587 switch (val & 0xffff0000) {
2588 case IB_LINKCMD_DOWN:
2589 lcmd = QLOGIC_IB_IBCC_LINKCMD_DOWN;
2590 if (!ppd->cpspec->ibdeltainprog &&
2591 qib_compat_ddr_negotiate) {
2592 ppd->cpspec->ibdeltainprog = 1;
2593 ppd->cpspec->ibsymsnap =
2594 read_7220_creg32(dd, cr_ibsymbolerr);
2595 ppd->cpspec->iblnkerrsnap =
2596 read_7220_creg32(dd, cr_iblinkerrrecov);
2597 }
2598 break;
2599
2600 case IB_LINKCMD_ARMED:
2601 lcmd = QLOGIC_IB_IBCC_LINKCMD_ARMED;
2602 break;
2603
2604 case IB_LINKCMD_ACTIVE:
2605 lcmd = QLOGIC_IB_IBCC_LINKCMD_ACTIVE;
2606 break;
2607
2608 default:
2609 ret = -EINVAL;
2610 qib_dev_err(dd, "bad linkcmd req 0x%x\n", val >> 16);
2611 goto bail;
2612 }
2613 switch (val & 0xffff) {
2614 case IB_LINKINITCMD_NOP:
2615 licmd = 0;
2616 break;
2617
2618 case IB_LINKINITCMD_POLL:
2619 licmd = QLOGIC_IB_IBCC_LINKINITCMD_POLL;
2620 break;
2621
2622 case IB_LINKINITCMD_SLEEP:
2623 licmd = QLOGIC_IB_IBCC_LINKINITCMD_SLEEP;
2624 break;
2625
2626 case IB_LINKINITCMD_DISABLE:
2627 licmd = QLOGIC_IB_IBCC_LINKINITCMD_DISABLE;
2628 ppd->cpspec->chase_end = 0;
2629 /*
2630 * stop state chase counter and timer, if running.
2631 * wait forpending timer, but don't clear .data (ppd)!
2632 */
2633 if (ppd->cpspec->chase_timer.expires) {
2634 del_timer_sync(&ppd->cpspec->chase_timer);
2635 ppd->cpspec->chase_timer.expires = 0;
2636 }
2637 break;
2638
2639 default:
2640 ret = -EINVAL;
2641 qib_dev_err(dd, "bad linkinitcmd req 0x%x\n",
2642 val & 0xffff);
2643 goto bail;
2644 }
2645 qib_set_ib_7220_lstate(ppd, lcmd, licmd);
2646 goto bail;
2647
2648 case QIB_IB_CFG_HRTBT: /* set Heartbeat off/enable/auto */
2649 if (val > IBA7220_IBC_HRTBT_MASK) {
2650 ret = -EINVAL;
2651 goto bail;
2652 }
2653 lsb = IBA7220_IBC_HRTBT_SHIFT;
2654 maskr = IBA7220_IBC_HRTBT_MASK;
2655 break;
2656
2657 default:
2658 ret = -EINVAL;
2659 goto bail;
2660 }
2661 ppd->cpspec->ibcddrctrl &= ~(maskr << lsb);
2662 ppd->cpspec->ibcddrctrl |= (((u64) val & maskr) << lsb);
2663 qib_write_kreg(dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
2664 qib_write_kreg(dd, kr_scratch, 0);
2665 if (setforce) {
2666 spin_lock_irqsave(&ppd->lflags_lock, flags);
2667 ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
2668 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2669 }
2670 bail:
2671 return ret;
2672 }
2673
2674 static int qib_7220_set_loopback(struct qib_pportdata *ppd, const char *what)
2675 {
2676 int ret = 0;
2677 u64 val, ddr;
2678
2679 if (!strncmp(what, "ibc", 3)) {
2680 ppd->cpspec->ibcctrl |= SYM_MASK(IBCCtrl, Loopback);
2681 val = 0; /* disable heart beat, so link will come up */
2682 qib_devinfo(ppd->dd->pcidev, "Enabling IB%u:%u IBC loopback\n",
2683 ppd->dd->unit, ppd->port);
2684 } else if (!strncmp(what, "off", 3)) {
2685 ppd->cpspec->ibcctrl &= ~SYM_MASK(IBCCtrl, Loopback);
2686 /* enable heart beat again */
2687 val = IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
2688 qib_devinfo(ppd->dd->pcidev, "Disabling IB%u:%u IBC loopback "
2689 "(normal)\n", ppd->dd->unit, ppd->port);
2690 } else
2691 ret = -EINVAL;
2692 if (!ret) {
2693 qib_write_kreg(ppd->dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2694 ddr = ppd->cpspec->ibcddrctrl & ~(IBA7220_IBC_HRTBT_MASK
2695 << IBA7220_IBC_HRTBT_SHIFT);
2696 ppd->cpspec->ibcddrctrl = ddr | val;
2697 qib_write_kreg(ppd->dd, kr_ibcddrctrl,
2698 ppd->cpspec->ibcddrctrl);
2699 qib_write_kreg(ppd->dd, kr_scratch, 0);
2700 }
2701 return ret;
2702 }
2703
2704 static void qib_update_7220_usrhead(struct qib_ctxtdata *rcd, u64 hd,
2705 u32 updegr, u32 egrhd, u32 npkts)
2706 {
2707 if (updegr)
2708 qib_write_ureg(rcd->dd, ur_rcvegrindexhead, egrhd, rcd->ctxt);
2709 mmiowb();
2710 qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
2711 mmiowb();
2712 }
2713
2714 static u32 qib_7220_hdrqempty(struct qib_ctxtdata *rcd)
2715 {
2716 u32 head, tail;
2717
2718 head = qib_read_ureg32(rcd->dd, ur_rcvhdrhead, rcd->ctxt);
2719 if (rcd->rcvhdrtail_kvaddr)
2720 tail = qib_get_rcvhdrtail(rcd);
2721 else
2722 tail = qib_read_ureg32(rcd->dd, ur_rcvhdrtail, rcd->ctxt);
2723 return head == tail;
2724 }
2725
2726 /*
2727 * Modify the RCVCTRL register in chip-specific way. This
2728 * is a function because bit positions and (future) register
2729 * location is chip-specifc, but the needed operations are
2730 * generic. <op> is a bit-mask because we often want to
2731 * do multiple modifications.
2732 */
2733 static void rcvctrl_7220_mod(struct qib_pportdata *ppd, unsigned int op,
2734 int ctxt)
2735 {
2736 struct qib_devdata *dd = ppd->dd;
2737 u64 mask, val;
2738 unsigned long flags;
2739
2740 spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
2741 if (op & QIB_RCVCTRL_TAILUPD_ENB)
2742 dd->rcvctrl |= (1ULL << IBA7220_R_TAILUPD_SHIFT);
2743 if (op & QIB_RCVCTRL_TAILUPD_DIS)
2744 dd->rcvctrl &= ~(1ULL << IBA7220_R_TAILUPD_SHIFT);
2745 if (op & QIB_RCVCTRL_PKEY_ENB)
2746 dd->rcvctrl &= ~(1ULL << IBA7220_R_PKEY_DIS_SHIFT);
2747 if (op & QIB_RCVCTRL_PKEY_DIS)
2748 dd->rcvctrl |= (1ULL << IBA7220_R_PKEY_DIS_SHIFT);
2749 if (ctxt < 0)
2750 mask = (1ULL << dd->ctxtcnt) - 1;
2751 else
2752 mask = (1ULL << ctxt);
2753 if (op & QIB_RCVCTRL_CTXT_ENB) {
2754 /* always done for specific ctxt */
2755 dd->rcvctrl |= (mask << SYM_LSB(RcvCtrl, PortEnable));
2756 if (!(dd->flags & QIB_NODMA_RTAIL))
2757 dd->rcvctrl |= 1ULL << IBA7220_R_TAILUPD_SHIFT;
2758 /* Write these registers before the context is enabled. */
2759 qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt,
2760 dd->rcd[ctxt]->rcvhdrqtailaddr_phys);
2761 qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt,
2762 dd->rcd[ctxt]->rcvhdrq_phys);
2763 dd->rcd[ctxt]->seq_cnt = 1;
2764 }
2765 if (op & QIB_RCVCTRL_CTXT_DIS)
2766 dd->rcvctrl &= ~(mask << SYM_LSB(RcvCtrl, PortEnable));
2767 if (op & QIB_RCVCTRL_INTRAVAIL_ENB)
2768 dd->rcvctrl |= (mask << IBA7220_R_INTRAVAIL_SHIFT);
2769 if (op & QIB_RCVCTRL_INTRAVAIL_DIS)
2770 dd->rcvctrl &= ~(mask << IBA7220_R_INTRAVAIL_SHIFT);
2771 qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
2772 if ((op & QIB_RCVCTRL_INTRAVAIL_ENB) && dd->rhdrhead_intr_off) {
2773 /* arm rcv interrupt */
2774 val = qib_read_ureg32(dd, ur_rcvhdrhead, ctxt) |
2775 dd->rhdrhead_intr_off;
2776 qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
2777 }
2778 if (op & QIB_RCVCTRL_CTXT_ENB) {
2779 /*
2780 * Init the context registers also; if we were
2781 * disabled, tail and head should both be zero
2782 * already from the enable, but since we don't
2783 * know, we have to do it explicitly.
2784 */
2785 val = qib_read_ureg32(dd, ur_rcvegrindextail, ctxt);
2786 qib_write_ureg(dd, ur_rcvegrindexhead, val, ctxt);
2787
2788 val = qib_read_ureg32(dd, ur_rcvhdrtail, ctxt);
2789 dd->rcd[ctxt]->head = val;
2790 /* If kctxt, interrupt on next receive. */
2791 if (ctxt < dd->first_user_ctxt)
2792 val |= dd->rhdrhead_intr_off;
2793 qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
2794 }
2795 if (op & QIB_RCVCTRL_CTXT_DIS) {
2796 if (ctxt >= 0) {
2797 qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt, 0);
2798 qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt, 0);
2799 } else {
2800 unsigned i;
2801
2802 for (i = 0; i < dd->cfgctxts; i++) {
2803 qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr,
2804 i, 0);
2805 qib_write_kreg_ctxt(dd, kr_rcvhdraddr, i, 0);
2806 }
2807 }
2808 }
2809 spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
2810 }
2811
2812 /*
2813 * Modify the SENDCTRL register in chip-specific way. This
2814 * is a function there may be multiple such registers with
2815 * slightly different layouts. To start, we assume the
2816 * "canonical" register layout of the first chips.
2817 * Chip requires no back-back sendctrl writes, so write
2818 * scratch register after writing sendctrl
2819 */
2820 static void sendctrl_7220_mod(struct qib_pportdata *ppd, u32 op)
2821 {
2822 struct qib_devdata *dd = ppd->dd;
2823 u64 tmp_dd_sendctrl;
2824 unsigned long flags;
2825
2826 spin_lock_irqsave(&dd->sendctrl_lock, flags);
2827
2828 /* First the ones that are "sticky", saved in shadow */
2829 if (op & QIB_SENDCTRL_CLEAR)
2830 dd->sendctrl = 0;
2831 if (op & QIB_SENDCTRL_SEND_DIS)
2832 dd->sendctrl &= ~SYM_MASK(SendCtrl, SPioEnable);
2833 else if (op & QIB_SENDCTRL_SEND_ENB) {
2834 dd->sendctrl |= SYM_MASK(SendCtrl, SPioEnable);
2835 if (dd->flags & QIB_USE_SPCL_TRIG)
2836 dd->sendctrl |= SYM_MASK(SendCtrl,
2837 SSpecialTriggerEn);
2838 }
2839 if (op & QIB_SENDCTRL_AVAIL_DIS)
2840 dd->sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
2841 else if (op & QIB_SENDCTRL_AVAIL_ENB)
2842 dd->sendctrl |= SYM_MASK(SendCtrl, SendBufAvailUpd);
2843
2844 if (op & QIB_SENDCTRL_DISARM_ALL) {
2845 u32 i, last;
2846
2847 tmp_dd_sendctrl = dd->sendctrl;
2848 /*
2849 * disarm any that are not yet launched, disabling sends
2850 * and updates until done.
2851 */
2852 last = dd->piobcnt2k + dd->piobcnt4k;
2853 tmp_dd_sendctrl &=
2854 ~(SYM_MASK(SendCtrl, SPioEnable) |
2855 SYM_MASK(SendCtrl, SendBufAvailUpd));
2856 for (i = 0; i < last; i++) {
2857 qib_write_kreg(dd, kr_sendctrl,
2858 tmp_dd_sendctrl |
2859 SYM_MASK(SendCtrl, Disarm) | i);
2860 qib_write_kreg(dd, kr_scratch, 0);
2861 }
2862 }
2863
2864 tmp_dd_sendctrl = dd->sendctrl;
2865
2866 if (op & QIB_SENDCTRL_FLUSH)
2867 tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Abort);
2868 if (op & QIB_SENDCTRL_DISARM)
2869 tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Disarm) |
2870 ((op & QIB_7220_SendCtrl_DisarmPIOBuf_RMASK) <<
2871 SYM_LSB(SendCtrl, DisarmPIOBuf));
2872 if ((op & QIB_SENDCTRL_AVAIL_BLIP) &&
2873 (dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
2874 tmp_dd_sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
2875
2876 qib_write_kreg(dd, kr_sendctrl, tmp_dd_sendctrl);
2877 qib_write_kreg(dd, kr_scratch, 0);
2878
2879 if (op & QIB_SENDCTRL_AVAIL_BLIP) {
2880 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
2881 qib_write_kreg(dd, kr_scratch, 0);
2882 }
2883
2884 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
2885
2886 if (op & QIB_SENDCTRL_FLUSH) {
2887 u32 v;
2888 /*
2889 * ensure writes have hit chip, then do a few
2890 * more reads, to allow DMA of pioavail registers
2891 * to occur, so in-memory copy is in sync with
2892 * the chip. Not always safe to sleep.
2893 */
2894 v = qib_read_kreg32(dd, kr_scratch);
2895 qib_write_kreg(dd, kr_scratch, v);
2896 v = qib_read_kreg32(dd, kr_scratch);
2897 qib_write_kreg(dd, kr_scratch, v);
2898 qib_read_kreg32(dd, kr_scratch);
2899 }
2900 }
2901
2902 /**
2903 * qib_portcntr_7220 - read a per-port counter
2904 * @dd: the qlogic_ib device
2905 * @creg: the counter to snapshot
2906 */
2907 static u64 qib_portcntr_7220(struct qib_pportdata *ppd, u32 reg)
2908 {
2909 u64 ret = 0ULL;
2910 struct qib_devdata *dd = ppd->dd;
2911 u16 creg;
2912 /* 0xffff for unimplemented or synthesized counters */
2913 static const u16 xlator[] = {
2914 [QIBPORTCNTR_PKTSEND] = cr_pktsend,
2915 [QIBPORTCNTR_WORDSEND] = cr_wordsend,
2916 [QIBPORTCNTR_PSXMITDATA] = cr_psxmitdatacount,
2917 [QIBPORTCNTR_PSXMITPKTS] = cr_psxmitpktscount,
2918 [QIBPORTCNTR_PSXMITWAIT] = cr_psxmitwaitcount,
2919 [QIBPORTCNTR_SENDSTALL] = cr_sendstall,
2920 [QIBPORTCNTR_PKTRCV] = cr_pktrcv,
2921 [QIBPORTCNTR_PSRCVDATA] = cr_psrcvdatacount,
2922 [QIBPORTCNTR_PSRCVPKTS] = cr_psrcvpktscount,
2923 [QIBPORTCNTR_RCVEBP] = cr_rcvebp,
2924 [QIBPORTCNTR_RCVOVFL] = cr_rcvovfl,
2925 [QIBPORTCNTR_WORDRCV] = cr_wordrcv,
2926 [QIBPORTCNTR_RXDROPPKT] = cr_rxdroppkt,
2927 [QIBPORTCNTR_RXLOCALPHYERR] = cr_rxotherlocalphyerr,
2928 [QIBPORTCNTR_RXVLERR] = cr_rxvlerr,
2929 [QIBPORTCNTR_ERRICRC] = cr_erricrc,
2930 [QIBPORTCNTR_ERRVCRC] = cr_errvcrc,
2931 [QIBPORTCNTR_ERRLPCRC] = cr_errlpcrc,
2932 [QIBPORTCNTR_BADFORMAT] = cr_badformat,
2933 [QIBPORTCNTR_ERR_RLEN] = cr_err_rlen,
2934 [QIBPORTCNTR_IBSYMBOLERR] = cr_ibsymbolerr,
2935 [QIBPORTCNTR_INVALIDRLEN] = cr_invalidrlen,
2936 [QIBPORTCNTR_UNSUPVL] = cr_txunsupvl,
2937 [QIBPORTCNTR_EXCESSBUFOVFL] = cr_excessbufferovfl,
2938 [QIBPORTCNTR_ERRLINK] = cr_errlink,
2939 [QIBPORTCNTR_IBLINKDOWN] = cr_iblinkdown,
2940 [QIBPORTCNTR_IBLINKERRRECOV] = cr_iblinkerrrecov,
2941 [QIBPORTCNTR_LLI] = cr_locallinkintegrityerr,
2942 [QIBPORTCNTR_PSINTERVAL] = cr_psinterval,
2943 [QIBPORTCNTR_PSSTART] = cr_psstart,
2944 [QIBPORTCNTR_PSSTAT] = cr_psstat,
2945 [QIBPORTCNTR_VL15PKTDROP] = cr_vl15droppedpkt,
2946 [QIBPORTCNTR_ERRPKEY] = cr_errpkey,
2947 [QIBPORTCNTR_KHDROVFL] = 0xffff,
2948 };
2949
2950 if (reg >= ARRAY_SIZE(xlator)) {
2951 qib_devinfo(ppd->dd->pcidev,
2952 "Unimplemented portcounter %u\n", reg);
2953 goto done;
2954 }
2955 creg = xlator[reg];
2956
2957 if (reg == QIBPORTCNTR_KHDROVFL) {
2958 int i;
2959
2960 /* sum over all kernel contexts */
2961 for (i = 0; i < dd->first_user_ctxt; i++)
2962 ret += read_7220_creg32(dd, cr_portovfl + i);
2963 }
2964 if (creg == 0xffff)
2965 goto done;
2966
2967 /*
2968 * only fast incrementing counters are 64bit; use 32 bit reads to
2969 * avoid two independent reads when on opteron
2970 */
2971 if ((creg == cr_wordsend || creg == cr_wordrcv ||
2972 creg == cr_pktsend || creg == cr_pktrcv))
2973 ret = read_7220_creg(dd, creg);
2974 else
2975 ret = read_7220_creg32(dd, creg);
2976 if (creg == cr_ibsymbolerr) {
2977 if (dd->pport->cpspec->ibdeltainprog)
2978 ret -= ret - ppd->cpspec->ibsymsnap;
2979 ret -= dd->pport->cpspec->ibsymdelta;
2980 } else if (creg == cr_iblinkerrrecov) {
2981 if (dd->pport->cpspec->ibdeltainprog)
2982 ret -= ret - ppd->cpspec->iblnkerrsnap;
2983 ret -= dd->pport->cpspec->iblnkerrdelta;
2984 }
2985 done:
2986 return ret;
2987 }
2988
2989 /*
2990 * Device counter names (not port-specific), one line per stat,
2991 * single string. Used by utilities like ipathstats to print the stats
2992 * in a way which works for different versions of drivers, without changing
2993 * the utility. Names need to be 12 chars or less (w/o newline), for proper
2994 * display by utility.
2995 * Non-error counters are first.
2996 * Start of "error" conters is indicated by a leading "E " on the first
2997 * "error" counter, and doesn't count in label length.
2998 * The EgrOvfl list needs to be last so we truncate them at the configured
2999 * context count for the device.
3000 * cntr7220indices contains the corresponding register indices.
3001 */
3002 static const char cntr7220names[] =
3003 "Interrupts\n"
3004 "HostBusStall\n"
3005 "E RxTIDFull\n"
3006 "RxTIDInvalid\n"
3007 "Ctxt0EgrOvfl\n"
3008 "Ctxt1EgrOvfl\n"
3009 "Ctxt2EgrOvfl\n"
3010 "Ctxt3EgrOvfl\n"
3011 "Ctxt4EgrOvfl\n"
3012 "Ctxt5EgrOvfl\n"
3013 "Ctxt6EgrOvfl\n"
3014 "Ctxt7EgrOvfl\n"
3015 "Ctxt8EgrOvfl\n"
3016 "Ctxt9EgrOvfl\n"
3017 "Ctx10EgrOvfl\n"
3018 "Ctx11EgrOvfl\n"
3019 "Ctx12EgrOvfl\n"
3020 "Ctx13EgrOvfl\n"
3021 "Ctx14EgrOvfl\n"
3022 "Ctx15EgrOvfl\n"
3023 "Ctx16EgrOvfl\n";
3024
3025 static const size_t cntr7220indices[] = {
3026 cr_lbint,
3027 cr_lbflowstall,
3028 cr_errtidfull,
3029 cr_errtidvalid,
3030 cr_portovfl + 0,
3031 cr_portovfl + 1,
3032 cr_portovfl + 2,
3033 cr_portovfl + 3,
3034 cr_portovfl + 4,
3035 cr_portovfl + 5,
3036 cr_portovfl + 6,
3037 cr_portovfl + 7,
3038 cr_portovfl + 8,
3039 cr_portovfl + 9,
3040 cr_portovfl + 10,
3041 cr_portovfl + 11,
3042 cr_portovfl + 12,
3043 cr_portovfl + 13,
3044 cr_portovfl + 14,
3045 cr_portovfl + 15,
3046 cr_portovfl + 16,
3047 };
3048
3049 /*
3050 * same as cntr7220names and cntr7220indices, but for port-specific counters.
3051 * portcntr7220indices is somewhat complicated by some registers needing
3052 * adjustments of various kinds, and those are ORed with _PORT_VIRT_FLAG
3053 */
3054 static const char portcntr7220names[] =
3055 "TxPkt\n"
3056 "TxFlowPkt\n"
3057 "TxWords\n"
3058 "RxPkt\n"
3059 "RxFlowPkt\n"
3060 "RxWords\n"
3061 "TxFlowStall\n"
3062 "TxDmaDesc\n" /* 7220 and 7322-only */
3063 "E RxDlidFltr\n" /* 7220 and 7322-only */
3064 "IBStatusChng\n"
3065 "IBLinkDown\n"
3066 "IBLnkRecov\n"
3067 "IBRxLinkErr\n"
3068 "IBSymbolErr\n"
3069 "RxLLIErr\n"
3070 "RxBadFormat\n"
3071 "RxBadLen\n"
3072 "RxBufOvrfl\n"
3073 "RxEBP\n"
3074 "RxFlowCtlErr\n"
3075 "RxICRCerr\n"
3076 "RxLPCRCerr\n"
3077 "RxVCRCerr\n"
3078 "RxInvalLen\n"
3079 "RxInvalPKey\n"
3080 "RxPktDropped\n"
3081 "TxBadLength\n"
3082 "TxDropped\n"
3083 "TxInvalLen\n"
3084 "TxUnderrun\n"
3085 "TxUnsupVL\n"
3086 "RxLclPhyErr\n" /* 7220 and 7322-only */
3087 "RxVL15Drop\n" /* 7220 and 7322-only */
3088 "RxVlErr\n" /* 7220 and 7322-only */
3089 "XcessBufOvfl\n" /* 7220 and 7322-only */
3090 ;
3091
3092 #define _PORT_VIRT_FLAG 0x8000 /* "virtual", need adjustments */
3093 static const size_t portcntr7220indices[] = {
3094 QIBPORTCNTR_PKTSEND | _PORT_VIRT_FLAG,
3095 cr_pktsendflow,
3096 QIBPORTCNTR_WORDSEND | _PORT_VIRT_FLAG,
3097 QIBPORTCNTR_PKTRCV | _PORT_VIRT_FLAG,
3098 cr_pktrcvflowctrl,
3099 QIBPORTCNTR_WORDRCV | _PORT_VIRT_FLAG,
3100 QIBPORTCNTR_SENDSTALL | _PORT_VIRT_FLAG,
3101 cr_txsdmadesc,
3102 cr_rxdlidfltr,
3103 cr_ibstatuschange,
3104 QIBPORTCNTR_IBLINKDOWN | _PORT_VIRT_FLAG,
3105 QIBPORTCNTR_IBLINKERRRECOV | _PORT_VIRT_FLAG,
3106 QIBPORTCNTR_ERRLINK | _PORT_VIRT_FLAG,
3107 QIBPORTCNTR_IBSYMBOLERR | _PORT_VIRT_FLAG,
3108 QIBPORTCNTR_LLI | _PORT_VIRT_FLAG,
3109 QIBPORTCNTR_BADFORMAT | _PORT_VIRT_FLAG,
3110 QIBPORTCNTR_ERR_RLEN | _PORT_VIRT_FLAG,
3111 QIBPORTCNTR_RCVOVFL | _PORT_VIRT_FLAG,
3112 QIBPORTCNTR_RCVEBP | _PORT_VIRT_FLAG,
3113 cr_rcvflowctrl_err,
3114 QIBPORTCNTR_ERRICRC | _PORT_VIRT_FLAG,
3115 QIBPORTCNTR_ERRLPCRC | _PORT_VIRT_FLAG,
3116 QIBPORTCNTR_ERRVCRC | _PORT_VIRT_FLAG,
3117 QIBPORTCNTR_INVALIDRLEN | _PORT_VIRT_FLAG,
3118 QIBPORTCNTR_ERRPKEY | _PORT_VIRT_FLAG,
3119 QIBPORTCNTR_RXDROPPKT | _PORT_VIRT_FLAG,
3120 cr_invalidslen,
3121 cr_senddropped,
3122 cr_errslen,
3123 cr_sendunderrun,
3124 cr_txunsupvl,
3125 QIBPORTCNTR_RXLOCALPHYERR | _PORT_VIRT_FLAG,
3126 QIBPORTCNTR_VL15PKTDROP | _PORT_VIRT_FLAG,
3127 QIBPORTCNTR_RXVLERR | _PORT_VIRT_FLAG,
3128 QIBPORTCNTR_EXCESSBUFOVFL | _PORT_VIRT_FLAG,
3129 };
3130
3131 /* do all the setup to make the counter reads efficient later */
3132 static void init_7220_cntrnames(struct qib_devdata *dd)
3133 {
3134 int i, j = 0;
3135 char *s;
3136
3137 for (i = 0, s = (char *)cntr7220names; s && j <= dd->cfgctxts;
3138 i++) {
3139 /* we always have at least one counter before the egrovfl */
3140 if (!j && !strncmp("Ctxt0EgrOvfl", s + 1, 12))
3141 j = 1;
3142 s = strchr(s + 1, '\n');
3143 if (s && j)
3144 j++;
3145 }
3146 dd->cspec->ncntrs = i;
3147 if (!s)
3148 /* full list; size is without terminating null */
3149 dd->cspec->cntrnamelen = sizeof(cntr7220names) - 1;
3150 else
3151 dd->cspec->cntrnamelen = 1 + s - cntr7220names;
3152 dd->cspec->cntrs = kmalloc(dd->cspec->ncntrs
3153 * sizeof(u64), GFP_KERNEL);
3154 if (!dd->cspec->cntrs)
3155 qib_dev_err(dd, "Failed allocation for counters\n");
3156
3157 for (i = 0, s = (char *)portcntr7220names; s; i++)
3158 s = strchr(s + 1, '\n');
3159 dd->cspec->nportcntrs = i - 1;
3160 dd->cspec->portcntrnamelen = sizeof(portcntr7220names) - 1;
3161 dd->cspec->portcntrs = kmalloc(dd->cspec->nportcntrs
3162 * sizeof(u64), GFP_KERNEL);
3163 if (!dd->cspec->portcntrs)
3164 qib_dev_err(dd, "Failed allocation for portcounters\n");
3165 }
3166
3167 static u32 qib_read_7220cntrs(struct qib_devdata *dd, loff_t pos, char **namep,
3168 u64 **cntrp)
3169 {
3170 u32 ret;
3171
3172 if (!dd->cspec->cntrs) {
3173 ret = 0;
3174 goto done;
3175 }
3176
3177 if (namep) {
3178 *namep = (char *)cntr7220names;
3179 ret = dd->cspec->cntrnamelen;
3180 if (pos >= ret)
3181 ret = 0; /* final read after getting everything */
3182 } else {
3183 u64 *cntr = dd->cspec->cntrs;
3184 int i;
3185
3186 ret = dd->cspec->ncntrs * sizeof(u64);
3187 if (!cntr || pos >= ret) {
3188 /* everything read, or couldn't get memory */
3189 ret = 0;
3190 goto done;
3191 }
3192
3193 *cntrp = cntr;
3194 for (i = 0; i < dd->cspec->ncntrs; i++)
3195 *cntr++ = read_7220_creg32(dd, cntr7220indices[i]);
3196 }
3197 done:
3198 return ret;
3199 }
3200
3201 static u32 qib_read_7220portcntrs(struct qib_devdata *dd, loff_t pos, u32 port,
3202 char **namep, u64 **cntrp)
3203 {
3204 u32 ret;
3205
3206 if (!dd->cspec->portcntrs) {
3207 ret = 0;
3208 goto done;
3209 }
3210 if (namep) {
3211 *namep = (char *)portcntr7220names;
3212 ret = dd->cspec->portcntrnamelen;
3213 if (pos >= ret)
3214 ret = 0; /* final read after getting everything */
3215 } else {
3216 u64 *cntr = dd->cspec->portcntrs;
3217 struct qib_pportdata *ppd = &dd->pport[port];
3218 int i;
3219
3220 ret = dd->cspec->nportcntrs * sizeof(u64);
3221 if (!cntr || pos >= ret) {
3222 /* everything read, or couldn't get memory */
3223 ret = 0;
3224 goto done;
3225 }
3226 *cntrp = cntr;
3227 for (i = 0; i < dd->cspec->nportcntrs; i++) {
3228 if (portcntr7220indices[i] & _PORT_VIRT_FLAG)
3229 *cntr++ = qib_portcntr_7220(ppd,
3230 portcntr7220indices[i] &
3231 ~_PORT_VIRT_FLAG);
3232 else
3233 *cntr++ = read_7220_creg32(dd,
3234 portcntr7220indices[i]);
3235 }
3236 }
3237 done:
3238 return ret;
3239 }
3240
3241 /**
3242 * qib_get_7220_faststats - get word counters from chip before they overflow
3243 * @opaque - contains a pointer to the qlogic_ib device qib_devdata
3244 *
3245 * This needs more work; in particular, decision on whether we really
3246 * need traffic_wds done the way it is
3247 * called from add_timer
3248 */
3249 static void qib_get_7220_faststats(unsigned long opaque)
3250 {
3251 struct qib_devdata *dd = (struct qib_devdata *) opaque;
3252 struct qib_pportdata *ppd = dd->pport;
3253 unsigned long flags;
3254 u64 traffic_wds;
3255
3256 /*
3257 * don't access the chip while running diags, or memory diags can
3258 * fail
3259 */
3260 if (!(dd->flags & QIB_INITTED) || dd->diag_client)
3261 /* but re-arm the timer, for diags case; won't hurt other */
3262 goto done;
3263
3264 /*
3265 * We now try to maintain an activity timer, based on traffic
3266 * exceeding a threshold, so we need to check the word-counts
3267 * even if they are 64-bit.
3268 */
3269 traffic_wds = qib_portcntr_7220(ppd, cr_wordsend) +
3270 qib_portcntr_7220(ppd, cr_wordrcv);
3271 spin_lock_irqsave(&dd->eep_st_lock, flags);
3272 traffic_wds -= dd->traffic_wds;
3273 dd->traffic_wds += traffic_wds;
3274 if (traffic_wds >= QIB_TRAFFIC_ACTIVE_THRESHOLD)
3275 atomic_add(5, &dd->active_time); /* S/B #define */
3276 spin_unlock_irqrestore(&dd->eep_st_lock, flags);
3277 done:
3278 mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
3279 }
3280
3281 /*
3282 * If we are using MSI, try to fallback to INTx.
3283 */
3284 static int qib_7220_intr_fallback(struct qib_devdata *dd)
3285 {
3286 if (!dd->msi_lo)
3287 return 0;
3288
3289 qib_devinfo(dd->pcidev, "MSI interrupt not detected,"
3290 " trying INTx interrupts\n");
3291 qib_7220_free_irq(dd);
3292 qib_enable_intx(dd->pcidev);
3293 /*
3294 * Some newer kernels require free_irq before disable_msi,
3295 * and irq can be changed during disable and INTx enable
3296 * and we need to therefore use the pcidev->irq value,
3297 * not our saved MSI value.
3298 */
3299 dd->cspec->irq = dd->pcidev->irq;
3300 qib_setup_7220_interrupt(dd);
3301 return 1;
3302 }
3303
3304 /*
3305 * Reset the XGXS (between serdes and IBC). Slightly less intrusive
3306 * than resetting the IBC or external link state, and useful in some
3307 * cases to cause some retraining. To do this right, we reset IBC
3308 * as well.
3309 */
3310 static void qib_7220_xgxs_reset(struct qib_pportdata *ppd)
3311 {
3312 u64 val, prev_val;
3313 struct qib_devdata *dd = ppd->dd;
3314
3315 prev_val = qib_read_kreg64(dd, kr_xgxs_cfg);
3316 val = prev_val | QLOGIC_IB_XGXS_RESET;
3317 prev_val &= ~QLOGIC_IB_XGXS_RESET; /* be sure */
3318 qib_write_kreg(dd, kr_control,
3319 dd->control & ~QLOGIC_IB_C_LINKENABLE);
3320 qib_write_kreg(dd, kr_xgxs_cfg, val);
3321 qib_read_kreg32(dd, kr_scratch);
3322 qib_write_kreg(dd, kr_xgxs_cfg, prev_val);
3323 qib_write_kreg(dd, kr_control, dd->control);
3324 }
3325
3326 /*
3327 * For this chip, we want to use the same buffer every time
3328 * when we are trying to bring the link up (they are always VL15
3329 * packets). At that link state the packet should always go out immediately
3330 * (or at least be discarded at the tx interface if the link is down).
3331 * If it doesn't, and the buffer isn't available, that means some other
3332 * sender has gotten ahead of us, and is preventing our packet from going
3333 * out. In that case, we flush all packets, and try again. If that still
3334 * fails, we fail the request, and hope things work the next time around.
3335 *
3336 * We don't need very complicated heuristics on whether the packet had
3337 * time to go out or not, since even at SDR 1X, it goes out in very short
3338 * time periods, covered by the chip reads done here and as part of the
3339 * flush.
3340 */
3341 static u32 __iomem *get_7220_link_buf(struct qib_pportdata *ppd, u32 *bnum)
3342 {
3343 u32 __iomem *buf;
3344 u32 lbuf = ppd->dd->cspec->lastbuf_for_pio;
3345 int do_cleanup;
3346 unsigned long flags;
3347
3348 /*
3349 * always blip to get avail list updated, since it's almost
3350 * always needed, and is fairly cheap.
3351 */
3352 sendctrl_7220_mod(ppd->dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
3353 qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
3354 buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
3355 if (buf)
3356 goto done;
3357
3358 spin_lock_irqsave(&ppd->sdma_lock, flags);
3359 if (ppd->sdma_state.current_state == qib_sdma_state_s20_idle &&
3360 ppd->sdma_state.current_state != qib_sdma_state_s00_hw_down) {
3361 __qib_sdma_process_event(ppd, qib_sdma_event_e00_go_hw_down);
3362 do_cleanup = 0;
3363 } else {
3364 do_cleanup = 1;
3365 qib_7220_sdma_hw_clean_up(ppd);
3366 }
3367 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3368
3369 if (do_cleanup) {
3370 qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
3371 buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
3372 }
3373 done:
3374 return buf;
3375 }
3376
3377 /*
3378 * This code for non-IBTA-compliant IB speed negotiation is only known to
3379 * work for the SDR to DDR transition, and only between an HCA and a switch
3380 * with recent firmware. It is based on observed heuristics, rather than
3381 * actual knowledge of the non-compliant speed negotiation.
3382 * It has a number of hard-coded fields, since the hope is to rewrite this
3383 * when a spec is available on how the negoation is intended to work.
3384 */
3385 static void autoneg_7220_sendpkt(struct qib_pportdata *ppd, u32 *hdr,
3386 u32 dcnt, u32 *data)
3387 {
3388 int i;
3389 u64 pbc;
3390 u32 __iomem *piobuf;
3391 u32 pnum;
3392 struct qib_devdata *dd = ppd->dd;
3393
3394 i = 0;
3395 pbc = 7 + dcnt + 1; /* 7 dword header, dword data, icrc */
3396 pbc |= PBC_7220_VL15_SEND;
3397 while (!(piobuf = get_7220_link_buf(ppd, &pnum))) {
3398 if (i++ > 5)
3399 return;
3400 udelay(2);
3401 }
3402 sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_DISARM_BUF(pnum));
3403 writeq(pbc, piobuf);
3404 qib_flush_wc();
3405 qib_pio_copy(piobuf + 2, hdr, 7);
3406 qib_pio_copy(piobuf + 9, data, dcnt);
3407 if (dd->flags & QIB_USE_SPCL_TRIG) {
3408 u32 spcl_off = (pnum >= dd->piobcnt2k) ? 2047 : 1023;
3409
3410 qib_flush_wc();
3411 __raw_writel(0xaebecede, piobuf + spcl_off);
3412 }
3413 qib_flush_wc();
3414 qib_sendbuf_done(dd, pnum);
3415 }
3416
3417 /*
3418 * _start packet gets sent twice at start, _done gets sent twice at end
3419 */
3420 static void autoneg_7220_send(struct qib_pportdata *ppd, int which)
3421 {
3422 struct qib_devdata *dd = ppd->dd;
3423 static u32 swapped;
3424 u32 dw, i, hcnt, dcnt, *data;
3425 static u32 hdr[7] = { 0xf002ffff, 0x48ffff, 0x6400abba };
3426 static u32 madpayload_start[0x40] = {
3427 0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
3428 0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
3429 0x1, 0x1388, 0x15e, 0x1, /* rest 0's */
3430 };
3431 static u32 madpayload_done[0x40] = {
3432 0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
3433 0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
3434 0x40000001, 0x1388, 0x15e, /* rest 0's */
3435 };
3436
3437 dcnt = ARRAY_SIZE(madpayload_start);
3438 hcnt = ARRAY_SIZE(hdr);
3439 if (!swapped) {
3440 /* for maintainability, do it at runtime */
3441 for (i = 0; i < hcnt; i++) {
3442 dw = (__force u32) cpu_to_be32(hdr[i]);
3443 hdr[i] = dw;
3444 }
3445 for (i = 0; i < dcnt; i++) {
3446 dw = (__force u32) cpu_to_be32(madpayload_start[i]);
3447 madpayload_start[i] = dw;
3448 dw = (__force u32) cpu_to_be32(madpayload_done[i]);
3449 madpayload_done[i] = dw;
3450 }
3451 swapped = 1;
3452 }
3453
3454 data = which ? madpayload_done : madpayload_start;
3455
3456 autoneg_7220_sendpkt(ppd, hdr, dcnt, data);
3457 qib_read_kreg64(dd, kr_scratch);
3458 udelay(2);
3459 autoneg_7220_sendpkt(ppd, hdr, dcnt, data);
3460 qib_read_kreg64(dd, kr_scratch);
3461 udelay(2);
3462 }
3463
3464 /*
3465 * Do the absolute minimum to cause an IB speed change, and make it
3466 * ready, but don't actually trigger the change. The caller will
3467 * do that when ready (if link is in Polling training state, it will
3468 * happen immediately, otherwise when link next goes down)
3469 *
3470 * This routine should only be used as part of the DDR autonegotation
3471 * code for devices that are not compliant with IB 1.2 (or code that
3472 * fixes things up for same).
3473 *
3474 * When link has gone down, and autoneg enabled, or autoneg has
3475 * failed and we give up until next time we set both speeds, and
3476 * then we want IBTA enabled as well as "use max enabled speed.
3477 */
3478 static void set_7220_ibspeed_fast(struct qib_pportdata *ppd, u32 speed)
3479 {
3480 ppd->cpspec->ibcddrctrl &= ~(IBA7220_IBC_SPEED_AUTONEG_MASK |
3481 IBA7220_IBC_IBTA_1_2_MASK);
3482
3483 if (speed == (QIB_IB_SDR | QIB_IB_DDR))
3484 ppd->cpspec->ibcddrctrl |= IBA7220_IBC_SPEED_AUTONEG_MASK |
3485 IBA7220_IBC_IBTA_1_2_MASK;
3486 else
3487 ppd->cpspec->ibcddrctrl |= speed == QIB_IB_DDR ?
3488 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
3489
3490 qib_write_kreg(ppd->dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
3491 qib_write_kreg(ppd->dd, kr_scratch, 0);
3492 }
3493
3494 /*
3495 * This routine is only used when we are not talking to another
3496 * IB 1.2-compliant device that we think can do DDR.
3497 * (This includes all existing switch chips as of Oct 2007.)
3498 * 1.2-compliant devices go directly to DDR prior to reaching INIT
3499 */
3500 static void try_7220_autoneg(struct qib_pportdata *ppd)
3501 {
3502 unsigned long flags;
3503
3504 /*
3505 * Required for older non-IB1.2 DDR switches. Newer
3506 * non-IB-compliant switches don't need it, but so far,
3507 * aren't bothered by it either. "Magic constant"
3508 */
3509 qib_write_kreg(ppd->dd, kr_ncmodectrl, 0x3b9dc07);
3510
3511 spin_lock_irqsave(&ppd->lflags_lock, flags);
3512 ppd->lflags |= QIBL_IB_AUTONEG_INPROG;
3513 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3514 autoneg_7220_send(ppd, 0);
3515 set_7220_ibspeed_fast(ppd, QIB_IB_DDR);
3516
3517 toggle_7220_rclkrls(ppd->dd);
3518 /* 2 msec is minimum length of a poll cycle */
3519 queue_delayed_work(ib_wq, &ppd->cpspec->autoneg_work,
3520 msecs_to_jiffies(2));
3521 }
3522
3523 /*
3524 * Handle the empirically determined mechanism for auto-negotiation
3525 * of DDR speed with switches.
3526 */
3527 static void autoneg_7220_work(struct work_struct *work)
3528 {
3529 struct qib_pportdata *ppd;
3530 struct qib_devdata *dd;
3531 u64 startms;
3532 u32 i;
3533 unsigned long flags;
3534
3535 ppd = &container_of(work, struct qib_chippport_specific,
3536 autoneg_work.work)->pportdata;
3537 dd = ppd->dd;
3538
3539 startms = jiffies_to_msecs(jiffies);
3540
3541 /*
3542 * Busy wait for this first part, it should be at most a
3543 * few hundred usec, since we scheduled ourselves for 2msec.
3544 */
3545 for (i = 0; i < 25; i++) {
3546 if (SYM_FIELD(ppd->lastibcstat, IBCStatus, LinkTrainingState)
3547 == IB_7220_LT_STATE_POLLQUIET) {
3548 qib_set_linkstate(ppd, QIB_IB_LINKDOWN_DISABLE);
3549 break;
3550 }
3551 udelay(100);
3552 }
3553
3554 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
3555 goto done; /* we got there early or told to stop */
3556
3557 /* we expect this to timeout */
3558 if (wait_event_timeout(ppd->cpspec->autoneg_wait,
3559 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3560 msecs_to_jiffies(90)))
3561 goto done;
3562
3563 toggle_7220_rclkrls(dd);
3564
3565 /* we expect this to timeout */
3566 if (wait_event_timeout(ppd->cpspec->autoneg_wait,
3567 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3568 msecs_to_jiffies(1700)))
3569 goto done;
3570
3571 set_7220_ibspeed_fast(ppd, QIB_IB_SDR);
3572 toggle_7220_rclkrls(dd);
3573
3574 /*
3575 * Wait up to 250 msec for link to train and get to INIT at DDR;
3576 * this should terminate early.
3577 */
3578 wait_event_timeout(ppd->cpspec->autoneg_wait,
3579 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3580 msecs_to_jiffies(250));
3581 done:
3582 if (ppd->lflags & QIBL_IB_AUTONEG_INPROG) {
3583 spin_lock_irqsave(&ppd->lflags_lock, flags);
3584 ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
3585 if (dd->cspec->autoneg_tries == AUTONEG_TRIES) {
3586 ppd->lflags |= QIBL_IB_AUTONEG_FAILED;
3587 dd->cspec->autoneg_tries = 0;
3588 }
3589 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3590 set_7220_ibspeed_fast(ppd, ppd->link_speed_enabled);
3591 }
3592 }
3593
3594 static u32 qib_7220_iblink_state(u64 ibcs)
3595 {
3596 u32 state = (u32)SYM_FIELD(ibcs, IBCStatus, LinkState);
3597
3598 switch (state) {
3599 case IB_7220_L_STATE_INIT:
3600 state = IB_PORT_INIT;
3601 break;
3602 case IB_7220_L_STATE_ARM:
3603 state = IB_PORT_ARMED;
3604 break;
3605 case IB_7220_L_STATE_ACTIVE:
3606 /* fall through */
3607 case IB_7220_L_STATE_ACT_DEFER:
3608 state = IB_PORT_ACTIVE;
3609 break;
3610 default: /* fall through */
3611 case IB_7220_L_STATE_DOWN:
3612 state = IB_PORT_DOWN;
3613 break;
3614 }
3615 return state;
3616 }
3617
3618 /* returns the IBTA port state, rather than the IBC link training state */
3619 static u8 qib_7220_phys_portstate(u64 ibcs)
3620 {
3621 u8 state = (u8)SYM_FIELD(ibcs, IBCStatus, LinkTrainingState);
3622 return qib_7220_physportstate[state];
3623 }
3624
3625 static int qib_7220_ib_updown(struct qib_pportdata *ppd, int ibup, u64 ibcs)
3626 {
3627 int ret = 0, symadj = 0;
3628 struct qib_devdata *dd = ppd->dd;
3629 unsigned long flags;
3630
3631 spin_lock_irqsave(&ppd->lflags_lock, flags);
3632 ppd->lflags &= ~QIBL_IB_FORCE_NOTIFY;
3633 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3634
3635 if (!ibup) {
3636 /*
3637 * When the link goes down we don't want AEQ running, so it
3638 * won't interfere with IBC training, etc., and we need
3639 * to go back to the static SerDes preset values.
3640 */
3641 if (!(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
3642 QIBL_IB_AUTONEG_INPROG)))
3643 set_7220_ibspeed_fast(ppd, ppd->link_speed_enabled);
3644 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
3645 qib_sd7220_presets(dd);
3646 qib_cancel_sends(ppd); /* initial disarm, etc. */
3647 spin_lock_irqsave(&ppd->sdma_lock, flags);
3648 if (__qib_sdma_running(ppd))
3649 __qib_sdma_process_event(ppd,
3650 qib_sdma_event_e70_go_idle);
3651 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3652 }
3653 /* this might better in qib_sd7220_presets() */
3654 set_7220_relock_poll(dd, ibup);
3655 } else {
3656 if (qib_compat_ddr_negotiate &&
3657 !(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
3658 QIBL_IB_AUTONEG_INPROG)) &&
3659 ppd->link_speed_active == QIB_IB_SDR &&
3660 (ppd->link_speed_enabled & (QIB_IB_DDR | QIB_IB_SDR)) ==
3661 (QIB_IB_DDR | QIB_IB_SDR) &&
3662 dd->cspec->autoneg_tries < AUTONEG_TRIES) {
3663 /* we are SDR, and DDR auto-negotiation enabled */
3664 ++dd->cspec->autoneg_tries;
3665 if (!ppd->cpspec->ibdeltainprog) {
3666 ppd->cpspec->ibdeltainprog = 1;
3667 ppd->cpspec->ibsymsnap = read_7220_creg32(dd,
3668 cr_ibsymbolerr);
3669 ppd->cpspec->iblnkerrsnap = read_7220_creg32(dd,
3670 cr_iblinkerrrecov);
3671 }
3672 try_7220_autoneg(ppd);
3673 ret = 1; /* no other IB status change processing */
3674 } else if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
3675 ppd->link_speed_active == QIB_IB_SDR) {
3676 autoneg_7220_send(ppd, 1);
3677 set_7220_ibspeed_fast(ppd, QIB_IB_DDR);
3678 udelay(2);
3679 toggle_7220_rclkrls(dd);
3680 ret = 1; /* no other IB status change processing */
3681 } else {
3682 if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
3683 (ppd->link_speed_active & QIB_IB_DDR)) {
3684 spin_lock_irqsave(&ppd->lflags_lock, flags);
3685 ppd->lflags &= ~(QIBL_IB_AUTONEG_INPROG |
3686 QIBL_IB_AUTONEG_FAILED);
3687 spin_unlock_irqrestore(&ppd->lflags_lock,
3688 flags);
3689 dd->cspec->autoneg_tries = 0;
3690 /* re-enable SDR, for next link down */
3691 set_7220_ibspeed_fast(ppd,
3692 ppd->link_speed_enabled);
3693 wake_up(&ppd->cpspec->autoneg_wait);
3694 symadj = 1;
3695 } else if (ppd->lflags & QIBL_IB_AUTONEG_FAILED) {
3696 /*
3697 * Clear autoneg failure flag, and do setup
3698 * so we'll try next time link goes down and
3699 * back to INIT (possibly connected to a
3700 * different device).
3701 */
3702 spin_lock_irqsave(&ppd->lflags_lock, flags);
3703 ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
3704 spin_unlock_irqrestore(&ppd->lflags_lock,
3705 flags);
3706 ppd->cpspec->ibcddrctrl |=
3707 IBA7220_IBC_IBTA_1_2_MASK;
3708 qib_write_kreg(dd, kr_ncmodectrl, 0);
3709 symadj = 1;
3710 }
3711 }
3712
3713 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
3714 symadj = 1;
3715
3716 if (!ret) {
3717 ppd->delay_mult = rate_to_delay
3718 [(ibcs >> IBA7220_LINKSPEED_SHIFT) & 1]
3719 [(ibcs >> IBA7220_LINKWIDTH_SHIFT) & 1];
3720
3721 set_7220_relock_poll(dd, ibup);
3722 spin_lock_irqsave(&ppd->sdma_lock, flags);
3723 /*
3724 * Unlike 7322, the 7220 needs this, due to lack of
3725 * interrupt in some cases when we have sdma active
3726 * when the link goes down.
3727 */
3728 if (ppd->sdma_state.current_state !=
3729 qib_sdma_state_s20_idle)
3730 __qib_sdma_process_event(ppd,
3731 qib_sdma_event_e00_go_hw_down);
3732 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3733 }
3734 }
3735
3736 if (symadj) {
3737 if (ppd->cpspec->ibdeltainprog) {
3738 ppd->cpspec->ibdeltainprog = 0;
3739 ppd->cpspec->ibsymdelta += read_7220_creg32(ppd->dd,
3740 cr_ibsymbolerr) - ppd->cpspec->ibsymsnap;
3741 ppd->cpspec->iblnkerrdelta += read_7220_creg32(ppd->dd,
3742 cr_iblinkerrrecov) - ppd->cpspec->iblnkerrsnap;
3743 }
3744 } else if (!ibup && qib_compat_ddr_negotiate &&
3745 !ppd->cpspec->ibdeltainprog &&
3746 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
3747 ppd->cpspec->ibdeltainprog = 1;
3748 ppd->cpspec->ibsymsnap = read_7220_creg32(ppd->dd,
3749 cr_ibsymbolerr);
3750 ppd->cpspec->iblnkerrsnap = read_7220_creg32(ppd->dd,
3751 cr_iblinkerrrecov);
3752 }
3753
3754 if (!ret)
3755 qib_setup_7220_setextled(ppd, ibup);
3756 return ret;
3757 }
3758
3759 /*
3760 * Does read/modify/write to appropriate registers to
3761 * set output and direction bits selected by mask.
3762 * these are in their canonical postions (e.g. lsb of
3763 * dir will end up in D48 of extctrl on existing chips).
3764 * returns contents of GP Inputs.
3765 */
3766 static int gpio_7220_mod(struct qib_devdata *dd, u32 out, u32 dir, u32 mask)
3767 {
3768 u64 read_val, new_out;
3769 unsigned long flags;
3770
3771 if (mask) {
3772 /* some bits being written, lock access to GPIO */
3773 dir &= mask;
3774 out &= mask;
3775 spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
3776 dd->cspec->extctrl &= ~((u64)mask << SYM_LSB(EXTCtrl, GPIOOe));
3777 dd->cspec->extctrl |= ((u64) dir << SYM_LSB(EXTCtrl, GPIOOe));
3778 new_out = (dd->cspec->gpio_out & ~mask) | out;
3779
3780 qib_write_kreg(dd, kr_extctrl, dd->cspec->extctrl);
3781 qib_write_kreg(dd, kr_gpio_out, new_out);
3782 dd->cspec->gpio_out = new_out;
3783 spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
3784 }
3785 /*
3786 * It is unlikely that a read at this time would get valid
3787 * data on a pin whose direction line was set in the same
3788 * call to this function. We include the read here because
3789 * that allows us to potentially combine a change on one pin with
3790 * a read on another, and because the old code did something like
3791 * this.
3792 */
3793 read_val = qib_read_kreg64(dd, kr_extstatus);
3794 return SYM_FIELD(read_val, EXTStatus, GPIOIn);
3795 }
3796
3797 /*
3798 * Read fundamental info we need to use the chip. These are
3799 * the registers that describe chip capabilities, and are
3800 * saved in shadow registers.
3801 */
3802 static void get_7220_chip_params(struct qib_devdata *dd)
3803 {
3804 u64 val;
3805 u32 piobufs;
3806 int mtu;
3807
3808 dd->uregbase = qib_read_kreg32(dd, kr_userregbase);
3809
3810 dd->rcvtidcnt = qib_read_kreg32(dd, kr_rcvtidcnt);
3811 dd->rcvtidbase = qib_read_kreg32(dd, kr_rcvtidbase);
3812 dd->rcvegrbase = qib_read_kreg32(dd, kr_rcvegrbase);
3813 dd->palign = qib_read_kreg32(dd, kr_palign);
3814 dd->piobufbase = qib_read_kreg64(dd, kr_sendpiobufbase);
3815 dd->pio2k_bufbase = dd->piobufbase & 0xffffffff;
3816
3817 val = qib_read_kreg64(dd, kr_sendpiosize);
3818 dd->piosize2k = val & ~0U;
3819 dd->piosize4k = val >> 32;
3820
3821 mtu = ib_mtu_enum_to_int(qib_ibmtu);
3822 if (mtu == -1)
3823 mtu = QIB_DEFAULT_MTU;
3824 dd->pport->ibmtu = (u32)mtu;
3825
3826 val = qib_read_kreg64(dd, kr_sendpiobufcnt);
3827 dd->piobcnt2k = val & ~0U;
3828 dd->piobcnt4k = val >> 32;
3829 /* these may be adjusted in init_chip_wc_pat() */
3830 dd->pio2kbase = (u32 __iomem *)
3831 ((char __iomem *) dd->kregbase + dd->pio2k_bufbase);
3832 if (dd->piobcnt4k) {
3833 dd->pio4kbase = (u32 __iomem *)
3834 ((char __iomem *) dd->kregbase +
3835 (dd->piobufbase >> 32));
3836 /*
3837 * 4K buffers take 2 pages; we use roundup just to be
3838 * paranoid; we calculate it once here, rather than on
3839 * ever buf allocate
3840 */
3841 dd->align4k = ALIGN(dd->piosize4k, dd->palign);
3842 }
3843
3844 piobufs = dd->piobcnt4k + dd->piobcnt2k;
3845
3846 dd->pioavregs = ALIGN(piobufs, sizeof(u64) * BITS_PER_BYTE / 2) /
3847 (sizeof(u64) * BITS_PER_BYTE / 2);
3848 }
3849
3850 /*
3851 * The chip base addresses in cspec and cpspec have to be set
3852 * after possible init_chip_wc_pat(), rather than in
3853 * qib_get_7220_chip_params(), so split out as separate function
3854 */
3855 static void set_7220_baseaddrs(struct qib_devdata *dd)
3856 {
3857 u32 cregbase;
3858 /* init after possible re-map in init_chip_wc_pat() */
3859 cregbase = qib_read_kreg32(dd, kr_counterregbase);
3860 dd->cspec->cregbase = (u64 __iomem *)
3861 ((char __iomem *) dd->kregbase + cregbase);
3862
3863 dd->egrtidbase = (u64 __iomem *)
3864 ((char __iomem *) dd->kregbase + dd->rcvegrbase);
3865 }
3866
3867
3868 #define SENDCTRL_SHADOWED (SYM_MASK(SendCtrl, SendIntBufAvail) | \
3869 SYM_MASK(SendCtrl, SPioEnable) | \
3870 SYM_MASK(SendCtrl, SSpecialTriggerEn) | \
3871 SYM_MASK(SendCtrl, SendBufAvailUpd) | \
3872 SYM_MASK(SendCtrl, AvailUpdThld) | \
3873 SYM_MASK(SendCtrl, SDmaEnable) | \
3874 SYM_MASK(SendCtrl, SDmaIntEnable) | \
3875 SYM_MASK(SendCtrl, SDmaHalt) | \
3876 SYM_MASK(SendCtrl, SDmaSingleDescriptor))
3877
3878 static int sendctrl_hook(struct qib_devdata *dd,
3879 const struct diag_observer *op,
3880 u32 offs, u64 *data, u64 mask, int only_32)
3881 {
3882 unsigned long flags;
3883 unsigned idx = offs / sizeof(u64);
3884 u64 local_data, all_bits;
3885
3886 if (idx != kr_sendctrl) {
3887 qib_dev_err(dd, "SendCtrl Hook called with offs %X, %s-bit\n",
3888 offs, only_32 ? "32" : "64");
3889 return 0;
3890 }
3891
3892 all_bits = ~0ULL;
3893 if (only_32)
3894 all_bits >>= 32;
3895 spin_lock_irqsave(&dd->sendctrl_lock, flags);
3896 if ((mask & all_bits) != all_bits) {
3897 /*
3898 * At least some mask bits are zero, so we need
3899 * to read. The judgement call is whether from
3900 * reg or shadow. First-cut: read reg, and complain
3901 * if any bits which should be shadowed are different
3902 * from their shadowed value.
3903 */
3904 if (only_32)
3905 local_data = (u64)qib_read_kreg32(dd, idx);
3906 else
3907 local_data = qib_read_kreg64(dd, idx);
3908 qib_dev_err(dd, "Sendctrl -> %X, Shad -> %X\n",
3909 (u32)local_data, (u32)dd->sendctrl);
3910 if ((local_data & SENDCTRL_SHADOWED) !=
3911 (dd->sendctrl & SENDCTRL_SHADOWED))
3912 qib_dev_err(dd, "Sendctrl read: %X shadow is %X\n",
3913 (u32)local_data, (u32) dd->sendctrl);
3914 *data = (local_data & ~mask) | (*data & mask);
3915 }
3916 if (mask) {
3917 /*
3918 * At least some mask bits are one, so we need
3919 * to write, but only shadow some bits.
3920 */
3921 u64 sval, tval; /* Shadowed, transient */
3922
3923 /*
3924 * New shadow val is bits we don't want to touch,
3925 * ORed with bits we do, that are intended for shadow.
3926 */
3927 sval = (dd->sendctrl & ~mask);
3928 sval |= *data & SENDCTRL_SHADOWED & mask;
3929 dd->sendctrl = sval;
3930 tval = sval | (*data & ~SENDCTRL_SHADOWED & mask);
3931 qib_dev_err(dd, "Sendctrl <- %X, Shad <- %X\n",
3932 (u32)tval, (u32)sval);
3933 qib_write_kreg(dd, kr_sendctrl, tval);
3934 qib_write_kreg(dd, kr_scratch, 0Ull);
3935 }
3936 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
3937
3938 return only_32 ? 4 : 8;
3939 }
3940
3941 static const struct diag_observer sendctrl_observer = {
3942 sendctrl_hook, kr_sendctrl * sizeof(u64),
3943 kr_sendctrl * sizeof(u64)
3944 };
3945
3946 /*
3947 * write the final few registers that depend on some of the
3948 * init setup. Done late in init, just before bringing up
3949 * the serdes.
3950 */
3951 static int qib_late_7220_initreg(struct qib_devdata *dd)
3952 {
3953 int ret = 0;
3954 u64 val;
3955
3956 qib_write_kreg(dd, kr_rcvhdrentsize, dd->rcvhdrentsize);
3957 qib_write_kreg(dd, kr_rcvhdrsize, dd->rcvhdrsize);
3958 qib_write_kreg(dd, kr_rcvhdrcnt, dd->rcvhdrcnt);
3959 qib_write_kreg(dd, kr_sendpioavailaddr, dd->pioavailregs_phys);
3960 val = qib_read_kreg64(dd, kr_sendpioavailaddr);
3961 if (val != dd->pioavailregs_phys) {
3962 qib_dev_err(dd, "Catastrophic software error, "
3963 "SendPIOAvailAddr written as %lx, "
3964 "read back as %llx\n",
3965 (unsigned long) dd->pioavailregs_phys,
3966 (unsigned long long) val);
3967 ret = -EINVAL;
3968 }
3969 qib_register_observer(dd, &sendctrl_observer);
3970 return ret;
3971 }
3972
3973 static int qib_init_7220_variables(struct qib_devdata *dd)
3974 {
3975 struct qib_chippport_specific *cpspec;
3976 struct qib_pportdata *ppd;
3977 int ret = 0;
3978 u32 sbufs, updthresh;
3979
3980 cpspec = (struct qib_chippport_specific *)(dd + 1);
3981 ppd = &cpspec->pportdata;
3982 dd->pport = ppd;
3983 dd->num_pports = 1;
3984
3985 dd->cspec = (struct qib_chip_specific *)(cpspec + dd->num_pports);
3986 ppd->cpspec = cpspec;
3987
3988 spin_lock_init(&dd->cspec->sdepb_lock);
3989 spin_lock_init(&dd->cspec->rcvmod_lock);
3990 spin_lock_init(&dd->cspec->gpio_lock);
3991
3992 /* we haven't yet set QIB_PRESENT, so use read directly */
3993 dd->revision = readq(&dd->kregbase[kr_revision]);
3994
3995 if ((dd->revision & 0xffffffffU) == 0xffffffffU) {
3996 qib_dev_err(dd, "Revision register read failure, "
3997 "giving up initialization\n");
3998 ret = -ENODEV;
3999 goto bail;
4000 }
4001 dd->flags |= QIB_PRESENT; /* now register routines work */
4002
4003 dd->majrev = (u8) SYM_FIELD(dd->revision, Revision_R,
4004 ChipRevMajor);
4005 dd->minrev = (u8) SYM_FIELD(dd->revision, Revision_R,
4006 ChipRevMinor);
4007
4008 get_7220_chip_params(dd);
4009 qib_7220_boardname(dd);
4010
4011 /*
4012 * GPIO bits for TWSI data and clock,
4013 * used for serial EEPROM.
4014 */
4015 dd->gpio_sda_num = _QIB_GPIO_SDA_NUM;
4016 dd->gpio_scl_num = _QIB_GPIO_SCL_NUM;
4017 dd->twsi_eeprom_dev = QIB_TWSI_EEPROM_DEV;
4018
4019 dd->flags |= QIB_HAS_INTX | QIB_HAS_LINK_LATENCY |
4020 QIB_NODMA_RTAIL | QIB_HAS_THRESH_UPDATE;
4021 dd->flags |= qib_special_trigger ?
4022 QIB_USE_SPCL_TRIG : QIB_HAS_SEND_DMA;
4023
4024 /*
4025 * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
4026 * 2 is Some Misc, 3 is reserved for future.
4027 */
4028 dd->eep_st_masks[0].hwerrs_to_log = HWE_MASK(TXEMemParityErr);
4029
4030 dd->eep_st_masks[1].hwerrs_to_log = HWE_MASK(RXEMemParityErr);
4031
4032 dd->eep_st_masks[2].errs_to_log = ERR_MASK(ResetNegated);
4033
4034 init_waitqueue_head(&cpspec->autoneg_wait);
4035 INIT_DELAYED_WORK(&cpspec->autoneg_work, autoneg_7220_work);
4036
4037 qib_init_pportdata(ppd, dd, 0, 1);
4038 ppd->link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
4039 ppd->link_speed_supported = QIB_IB_SDR | QIB_IB_DDR;
4040
4041 ppd->link_width_enabled = ppd->link_width_supported;
4042 ppd->link_speed_enabled = ppd->link_speed_supported;
4043 /*
4044 * Set the initial values to reasonable default, will be set
4045 * for real when link is up.
4046 */
4047 ppd->link_width_active = IB_WIDTH_4X;
4048 ppd->link_speed_active = QIB_IB_SDR;
4049 ppd->delay_mult = rate_to_delay[0][1];
4050 ppd->vls_supported = IB_VL_VL0;
4051 ppd->vls_operational = ppd->vls_supported;
4052
4053 if (!qib_mini_init)
4054 qib_write_kreg(dd, kr_rcvbthqp, QIB_KD_QP);
4055
4056 init_timer(&ppd->cpspec->chase_timer);
4057 ppd->cpspec->chase_timer.function = reenable_7220_chase;
4058 ppd->cpspec->chase_timer.data = (unsigned long)ppd;
4059
4060 qib_num_cfg_vls = 1; /* if any 7220's, only one VL */
4061
4062 dd->rcvhdrentsize = QIB_RCVHDR_ENTSIZE;
4063 dd->rcvhdrsize = QIB_DFLT_RCVHDRSIZE;
4064 dd->rhf_offset =
4065 dd->rcvhdrentsize - sizeof(u64) / sizeof(u32);
4066
4067 /* we always allocate at least 2048 bytes for eager buffers */
4068 ret = ib_mtu_enum_to_int(qib_ibmtu);
4069 dd->rcvegrbufsize = ret != -1 ? max(ret, 2048) : QIB_DEFAULT_MTU;
4070
4071 qib_7220_tidtemplate(dd);
4072
4073 /*
4074 * We can request a receive interrupt for 1 or
4075 * more packets from current offset. For now, we set this
4076 * up for a single packet.
4077 */
4078 dd->rhdrhead_intr_off = 1ULL << 32;
4079
4080 /* setup the stats timer; the add_timer is done at end of init */
4081 init_timer(&dd->stats_timer);
4082 dd->stats_timer.function = qib_get_7220_faststats;
4083 dd->stats_timer.data = (unsigned long) dd;
4084 dd->stats_timer.expires = jiffies + ACTIVITY_TIMER * HZ;
4085
4086 /*
4087 * Control[4] has been added to change the arbitration within
4088 * the SDMA engine between favoring data fetches over descriptor
4089 * fetches. qib_sdma_fetch_arb==0 gives data fetches priority.
4090 */
4091 if (qib_sdma_fetch_arb)
4092 dd->control |= 1 << 4;
4093
4094 dd->ureg_align = 0x10000; /* 64KB alignment */
4095
4096 dd->piosize2kmax_dwords = (dd->piosize2k >> 2)-1;
4097 qib_7220_config_ctxts(dd);
4098 qib_set_ctxtcnt(dd); /* needed for PAT setup */
4099
4100 if (qib_wc_pat) {
4101 ret = init_chip_wc_pat(dd, 0);
4102 if (ret)
4103 goto bail;
4104 }
4105 set_7220_baseaddrs(dd); /* set chip access pointers now */
4106
4107 ret = 0;
4108 if (qib_mini_init)
4109 goto bail;
4110
4111 ret = qib_create_ctxts(dd);
4112 init_7220_cntrnames(dd);
4113
4114 /* use all of 4KB buffers for the kernel SDMA, zero if !SDMA.
4115 * reserve the update threshold amount for other kernel use, such
4116 * as sending SMI, MAD, and ACKs, or 3, whichever is greater,
4117 * unless we aren't enabling SDMA, in which case we want to use
4118 * all the 4k bufs for the kernel.
4119 * if this was less than the update threshold, we could wait
4120 * a long time for an update. Coded this way because we
4121 * sometimes change the update threshold for various reasons,
4122 * and we want this to remain robust.
4123 */
4124 updthresh = 8U; /* update threshold */
4125 if (dd->flags & QIB_HAS_SEND_DMA) {
4126 dd->cspec->sdmabufcnt = dd->piobcnt4k;
4127 sbufs = updthresh > 3 ? updthresh : 3;
4128 } else {
4129 dd->cspec->sdmabufcnt = 0;
4130 sbufs = dd->piobcnt4k;
4131 }
4132
4133 dd->cspec->lastbuf_for_pio = dd->piobcnt2k + dd->piobcnt4k -
4134 dd->cspec->sdmabufcnt;
4135 dd->lastctxt_piobuf = dd->cspec->lastbuf_for_pio - sbufs;
4136 dd->cspec->lastbuf_for_pio--; /* range is <= , not < */
4137 dd->pbufsctxt = dd->lastctxt_piobuf /
4138 (dd->cfgctxts - dd->first_user_ctxt);
4139
4140 /*
4141 * if we are at 16 user contexts, we will have one 7 sbufs
4142 * per context, so drop the update threshold to match. We
4143 * want to update before we actually run out, at low pbufs/ctxt
4144 * so give ourselves some margin
4145 */
4146 if ((dd->pbufsctxt - 2) < updthresh)
4147 updthresh = dd->pbufsctxt - 2;
4148
4149 dd->cspec->updthresh_dflt = updthresh;
4150 dd->cspec->updthresh = updthresh;
4151
4152 /* before full enable, no interrupts, no locking needed */
4153 dd->sendctrl |= (updthresh & SYM_RMASK(SendCtrl, AvailUpdThld))
4154 << SYM_LSB(SendCtrl, AvailUpdThld);
4155
4156 dd->psxmitwait_supported = 1;
4157 dd->psxmitwait_check_rate = QIB_7220_PSXMITWAIT_CHECK_RATE;
4158 bail:
4159 return ret;
4160 }
4161
4162 static u32 __iomem *qib_7220_getsendbuf(struct qib_pportdata *ppd, u64 pbc,
4163 u32 *pbufnum)
4164 {
4165 u32 first, last, plen = pbc & QIB_PBC_LENGTH_MASK;
4166 struct qib_devdata *dd = ppd->dd;
4167 u32 __iomem *buf;
4168
4169 if (((pbc >> 32) & PBC_7220_VL15_SEND_CTRL) &&
4170 !(ppd->lflags & (QIBL_IB_AUTONEG_INPROG | QIBL_LINKACTIVE)))
4171 buf = get_7220_link_buf(ppd, pbufnum);
4172 else {
4173 if ((plen + 1) > dd->piosize2kmax_dwords)
4174 first = dd->piobcnt2k;
4175 else
4176 first = 0;
4177 /* try 4k if all 2k busy, so same last for both sizes */
4178 last = dd->cspec->lastbuf_for_pio;
4179 buf = qib_getsendbuf_range(dd, pbufnum, first, last);
4180 }
4181 return buf;
4182 }
4183
4184 /* these 2 "counters" are really control registers, and are always RW */
4185 static void qib_set_cntr_7220_sample(struct qib_pportdata *ppd, u32 intv,
4186 u32 start)
4187 {
4188 write_7220_creg(ppd->dd, cr_psinterval, intv);
4189 write_7220_creg(ppd->dd, cr_psstart, start);
4190 }
4191
4192 /*
4193 * NOTE: no real attempt is made to generalize the SDMA stuff.
4194 * At some point "soon" we will have a new more generalized
4195 * set of sdma interface, and then we'll clean this up.
4196 */
4197
4198 /* Must be called with sdma_lock held, or before init finished */
4199 static void qib_sdma_update_7220_tail(struct qib_pportdata *ppd, u16 tail)
4200 {
4201 /* Commit writes to memory and advance the tail on the chip */
4202 wmb();
4203 ppd->sdma_descq_tail = tail;
4204 qib_write_kreg(ppd->dd, kr_senddmatail, tail);
4205 }
4206
4207 static void qib_sdma_set_7220_desc_cnt(struct qib_pportdata *ppd, unsigned cnt)
4208 {
4209 }
4210
4211 static struct sdma_set_state_action sdma_7220_action_table[] = {
4212 [qib_sdma_state_s00_hw_down] = {
4213 .op_enable = 0,
4214 .op_intenable = 0,
4215 .op_halt = 0,
4216 .go_s99_running_tofalse = 1,
4217 },
4218 [qib_sdma_state_s10_hw_start_up_wait] = {
4219 .op_enable = 1,
4220 .op_intenable = 1,
4221 .op_halt = 1,
4222 },
4223 [qib_sdma_state_s20_idle] = {
4224 .op_enable = 1,
4225 .op_intenable = 1,
4226 .op_halt = 1,
4227 },
4228 [qib_sdma_state_s30_sw_clean_up_wait] = {
4229 .op_enable = 0,
4230 .op_intenable = 1,
4231 .op_halt = 0,
4232 },
4233 [qib_sdma_state_s40_hw_clean_up_wait] = {
4234 .op_enable = 1,
4235 .op_intenable = 1,
4236 .op_halt = 1,
4237 },
4238 [qib_sdma_state_s50_hw_halt_wait] = {
4239 .op_enable = 1,
4240 .op_intenable = 1,
4241 .op_halt = 1,
4242 },
4243 [qib_sdma_state_s99_running] = {
4244 .op_enable = 1,
4245 .op_intenable = 1,
4246 .op_halt = 0,
4247 .go_s99_running_totrue = 1,
4248 },
4249 };
4250
4251 static void qib_7220_sdma_init_early(struct qib_pportdata *ppd)
4252 {
4253 ppd->sdma_state.set_state_action = sdma_7220_action_table;
4254 }
4255
4256 static int init_sdma_7220_regs(struct qib_pportdata *ppd)
4257 {
4258 struct qib_devdata *dd = ppd->dd;
4259 unsigned i, n;
4260 u64 senddmabufmask[3] = { 0 };
4261
4262 /* Set SendDmaBase */
4263 qib_write_kreg(dd, kr_senddmabase, ppd->sdma_descq_phys);
4264 qib_sdma_7220_setlengen(ppd);
4265 qib_sdma_update_7220_tail(ppd, 0); /* Set SendDmaTail */
4266 /* Set SendDmaHeadAddr */
4267 qib_write_kreg(dd, kr_senddmaheadaddr, ppd->sdma_head_phys);
4268
4269 /*
4270 * Reserve all the former "kernel" piobufs, using high number range
4271 * so we get as many 4K buffers as possible
4272 */
4273 n = dd->piobcnt2k + dd->piobcnt4k;
4274 i = n - dd->cspec->sdmabufcnt;
4275
4276 for (; i < n; ++i) {
4277 unsigned word = i / 64;
4278 unsigned bit = i & 63;
4279
4280 BUG_ON(word >= 3);
4281 senddmabufmask[word] |= 1ULL << bit;
4282 }
4283 qib_write_kreg(dd, kr_senddmabufmask0, senddmabufmask[0]);
4284 qib_write_kreg(dd, kr_senddmabufmask1, senddmabufmask[1]);
4285 qib_write_kreg(dd, kr_senddmabufmask2, senddmabufmask[2]);
4286
4287 ppd->sdma_state.first_sendbuf = i;
4288 ppd->sdma_state.last_sendbuf = n;
4289
4290 return 0;
4291 }
4292
4293 /* sdma_lock must be held */
4294 static u16 qib_sdma_7220_gethead(struct qib_pportdata *ppd)
4295 {
4296 struct qib_devdata *dd = ppd->dd;
4297 int sane;
4298 int use_dmahead;
4299 u16 swhead;
4300 u16 swtail;
4301 u16 cnt;
4302 u16 hwhead;
4303
4304 use_dmahead = __qib_sdma_running(ppd) &&
4305 (dd->flags & QIB_HAS_SDMA_TIMEOUT);
4306 retry:
4307 hwhead = use_dmahead ?
4308 (u16)le64_to_cpu(*ppd->sdma_head_dma) :
4309 (u16)qib_read_kreg32(dd, kr_senddmahead);
4310
4311 swhead = ppd->sdma_descq_head;
4312 swtail = ppd->sdma_descq_tail;
4313 cnt = ppd->sdma_descq_cnt;
4314
4315 if (swhead < swtail) {
4316 /* not wrapped */
4317 sane = (hwhead >= swhead) & (hwhead <= swtail);
4318 } else if (swhead > swtail) {
4319 /* wrapped around */
4320 sane = ((hwhead >= swhead) && (hwhead < cnt)) ||
4321 (hwhead <= swtail);
4322 } else {
4323 /* empty */
4324 sane = (hwhead == swhead);
4325 }
4326
4327 if (unlikely(!sane)) {
4328 if (use_dmahead) {
4329 /* try one more time, directly from the register */
4330 use_dmahead = 0;
4331 goto retry;
4332 }
4333 /* assume no progress */
4334 hwhead = swhead;
4335 }
4336
4337 return hwhead;
4338 }
4339
4340 static int qib_sdma_7220_busy(struct qib_pportdata *ppd)
4341 {
4342 u64 hwstatus = qib_read_kreg64(ppd->dd, kr_senddmastatus);
4343
4344 return (hwstatus & SYM_MASK(SendDmaStatus, ScoreBoardDrainInProg)) ||
4345 (hwstatus & SYM_MASK(SendDmaStatus, AbortInProg)) ||
4346 (hwstatus & SYM_MASK(SendDmaStatus, InternalSDmaEnable)) ||
4347 !(hwstatus & SYM_MASK(SendDmaStatus, ScbEmpty));
4348 }
4349
4350 /*
4351 * Compute the amount of delay before sending the next packet if the
4352 * port's send rate differs from the static rate set for the QP.
4353 * Since the delay affects this packet but the amount of the delay is
4354 * based on the length of the previous packet, use the last delay computed
4355 * and save the delay count for this packet to be used next time
4356 * we get here.
4357 */
4358 static u32 qib_7220_setpbc_control(struct qib_pportdata *ppd, u32 plen,
4359 u8 srate, u8 vl)
4360 {
4361 u8 snd_mult = ppd->delay_mult;
4362 u8 rcv_mult = ib_rate_to_delay[srate];
4363 u32 ret = ppd->cpspec->last_delay_mult;
4364
4365 ppd->cpspec->last_delay_mult = (rcv_mult > snd_mult) ?
4366 (plen * (rcv_mult - snd_mult) + 1) >> 1 : 0;
4367
4368 /* Indicate VL15, if necessary */
4369 if (vl == 15)
4370 ret |= PBC_7220_VL15_SEND_CTRL;
4371 return ret;
4372 }
4373
4374 static void qib_7220_initvl15_bufs(struct qib_devdata *dd)
4375 {
4376 }
4377
4378 static void qib_7220_init_ctxt(struct qib_ctxtdata *rcd)
4379 {
4380 if (!rcd->ctxt) {
4381 rcd->rcvegrcnt = IBA7220_KRCVEGRCNT;
4382 rcd->rcvegr_tid_base = 0;
4383 } else {
4384 rcd->rcvegrcnt = rcd->dd->cspec->rcvegrcnt;
4385 rcd->rcvegr_tid_base = IBA7220_KRCVEGRCNT +
4386 (rcd->ctxt - 1) * rcd->rcvegrcnt;
4387 }
4388 }
4389
4390 static void qib_7220_txchk_change(struct qib_devdata *dd, u32 start,
4391 u32 len, u32 which, struct qib_ctxtdata *rcd)
4392 {
4393 int i;
4394 unsigned long flags;
4395
4396 switch (which) {
4397 case TXCHK_CHG_TYPE_KERN:
4398 /* see if we need to raise avail update threshold */
4399 spin_lock_irqsave(&dd->uctxt_lock, flags);
4400 for (i = dd->first_user_ctxt;
4401 dd->cspec->updthresh != dd->cspec->updthresh_dflt
4402 && i < dd->cfgctxts; i++)
4403 if (dd->rcd[i] && dd->rcd[i]->subctxt_cnt &&
4404 ((dd->rcd[i]->piocnt / dd->rcd[i]->subctxt_cnt) - 1)
4405 < dd->cspec->updthresh_dflt)
4406 break;
4407 spin_unlock_irqrestore(&dd->uctxt_lock, flags);
4408 if (i == dd->cfgctxts) {
4409 spin_lock_irqsave(&dd->sendctrl_lock, flags);
4410 dd->cspec->updthresh = dd->cspec->updthresh_dflt;
4411 dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
4412 dd->sendctrl |= (dd->cspec->updthresh &
4413 SYM_RMASK(SendCtrl, AvailUpdThld)) <<
4414 SYM_LSB(SendCtrl, AvailUpdThld);
4415 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4416 sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
4417 }
4418 break;
4419 case TXCHK_CHG_TYPE_USER:
4420 spin_lock_irqsave(&dd->sendctrl_lock, flags);
4421 if (rcd && rcd->subctxt_cnt && ((rcd->piocnt
4422 / rcd->subctxt_cnt) - 1) < dd->cspec->updthresh) {
4423 dd->cspec->updthresh = (rcd->piocnt /
4424 rcd->subctxt_cnt) - 1;
4425 dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
4426 dd->sendctrl |= (dd->cspec->updthresh &
4427 SYM_RMASK(SendCtrl, AvailUpdThld))
4428 << SYM_LSB(SendCtrl, AvailUpdThld);
4429 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4430 sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
4431 } else
4432 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4433 break;
4434 }
4435 }
4436
4437 static void writescratch(struct qib_devdata *dd, u32 val)
4438 {
4439 qib_write_kreg(dd, kr_scratch, val);
4440 }
4441
4442 #define VALID_TS_RD_REG_MASK 0xBF
4443 /**
4444 * qib_7220_tempsense_read - read register of temp sensor via TWSI
4445 * @dd: the qlogic_ib device
4446 * @regnum: register to read from
4447 *
4448 * returns reg contents (0..255) or < 0 for error
4449 */
4450 static int qib_7220_tempsense_rd(struct qib_devdata *dd, int regnum)
4451 {
4452 int ret;
4453 u8 rdata;
4454
4455 if (regnum > 7) {
4456 ret = -EINVAL;
4457 goto bail;
4458 }
4459
4460 /* return a bogus value for (the one) register we do not have */
4461 if (!((1 << regnum) & VALID_TS_RD_REG_MASK)) {
4462 ret = 0;
4463 goto bail;
4464 }
4465
4466 ret = mutex_lock_interruptible(&dd->eep_lock);
4467 if (ret)
4468 goto bail;
4469
4470 ret = qib_twsi_blk_rd(dd, QIB_TWSI_TEMP_DEV, regnum, &rdata, 1);
4471 if (!ret)
4472 ret = rdata;
4473
4474 mutex_unlock(&dd->eep_lock);
4475
4476 /*
4477 * There are three possibilities here:
4478 * ret is actual value (0..255)
4479 * ret is -ENXIO or -EINVAL from twsi code or this file
4480 * ret is -EINTR from mutex_lock_interruptible.
4481 */
4482 bail:
4483 return ret;
4484 }
4485
4486 /* Dummy function, as 7220 boards never disable EEPROM Write */
4487 static int qib_7220_eeprom_wen(struct qib_devdata *dd, int wen)
4488 {
4489 return 1;
4490 }
4491
4492 /**
4493 * qib_init_iba7220_funcs - set up the chip-specific function pointers
4494 * @dev: the pci_dev for qlogic_ib device
4495 * @ent: pci_device_id struct for this dev
4496 *
4497 * This is global, and is called directly at init to set up the
4498 * chip-specific function pointers for later use.
4499 */
4500 struct qib_devdata *qib_init_iba7220_funcs(struct pci_dev *pdev,
4501 const struct pci_device_id *ent)
4502 {
4503 struct qib_devdata *dd;
4504 int ret;
4505 u32 boardid, minwidth;
4506
4507 dd = qib_alloc_devdata(pdev, sizeof(struct qib_chip_specific) +
4508 sizeof(struct qib_chippport_specific));
4509 if (IS_ERR(dd))
4510 goto bail;
4511
4512 dd->f_bringup_serdes = qib_7220_bringup_serdes;
4513 dd->f_cleanup = qib_setup_7220_cleanup;
4514 dd->f_clear_tids = qib_7220_clear_tids;
4515 dd->f_free_irq = qib_7220_free_irq;
4516 dd->f_get_base_info = qib_7220_get_base_info;
4517 dd->f_get_msgheader = qib_7220_get_msgheader;
4518 dd->f_getsendbuf = qib_7220_getsendbuf;
4519 dd->f_gpio_mod = gpio_7220_mod;
4520 dd->f_eeprom_wen = qib_7220_eeprom_wen;
4521 dd->f_hdrqempty = qib_7220_hdrqempty;
4522 dd->f_ib_updown = qib_7220_ib_updown;
4523 dd->f_init_ctxt = qib_7220_init_ctxt;
4524 dd->f_initvl15_bufs = qib_7220_initvl15_bufs;
4525 dd->f_intr_fallback = qib_7220_intr_fallback;
4526 dd->f_late_initreg = qib_late_7220_initreg;
4527 dd->f_setpbc_control = qib_7220_setpbc_control;
4528 dd->f_portcntr = qib_portcntr_7220;
4529 dd->f_put_tid = qib_7220_put_tid;
4530 dd->f_quiet_serdes = qib_7220_quiet_serdes;
4531 dd->f_rcvctrl = rcvctrl_7220_mod;
4532 dd->f_read_cntrs = qib_read_7220cntrs;
4533 dd->f_read_portcntrs = qib_read_7220portcntrs;
4534 dd->f_reset = qib_setup_7220_reset;
4535 dd->f_init_sdma_regs = init_sdma_7220_regs;
4536 dd->f_sdma_busy = qib_sdma_7220_busy;
4537 dd->f_sdma_gethead = qib_sdma_7220_gethead;
4538 dd->f_sdma_sendctrl = qib_7220_sdma_sendctrl;
4539 dd->f_sdma_set_desc_cnt = qib_sdma_set_7220_desc_cnt;
4540 dd->f_sdma_update_tail = qib_sdma_update_7220_tail;
4541 dd->f_sdma_hw_clean_up = qib_7220_sdma_hw_clean_up;
4542 dd->f_sdma_hw_start_up = qib_7220_sdma_hw_start_up;
4543 dd->f_sdma_init_early = qib_7220_sdma_init_early;
4544 dd->f_sendctrl = sendctrl_7220_mod;
4545 dd->f_set_armlaunch = qib_set_7220_armlaunch;
4546 dd->f_set_cntr_sample = qib_set_cntr_7220_sample;
4547 dd->f_iblink_state = qib_7220_iblink_state;
4548 dd->f_ibphys_portstate = qib_7220_phys_portstate;
4549 dd->f_get_ib_cfg = qib_7220_get_ib_cfg;
4550 dd->f_set_ib_cfg = qib_7220_set_ib_cfg;
4551 dd->f_set_ib_loopback = qib_7220_set_loopback;
4552 dd->f_set_intr_state = qib_7220_set_intr_state;
4553 dd->f_setextled = qib_setup_7220_setextled;
4554 dd->f_txchk_change = qib_7220_txchk_change;
4555 dd->f_update_usrhead = qib_update_7220_usrhead;
4556 dd->f_wantpiobuf_intr = qib_wantpiobuf_7220_intr;
4557 dd->f_xgxs_reset = qib_7220_xgxs_reset;
4558 dd->f_writescratch = writescratch;
4559 dd->f_tempsense_rd = qib_7220_tempsense_rd;
4560 /*
4561 * Do remaining pcie setup and save pcie values in dd.
4562 * Any error printing is already done by the init code.
4563 * On return, we have the chip mapped, but chip registers
4564 * are not set up until start of qib_init_7220_variables.
4565 */
4566 ret = qib_pcie_ddinit(dd, pdev, ent);
4567 if (ret < 0)
4568 goto bail_free;
4569
4570 /* initialize chip-specific variables */
4571 ret = qib_init_7220_variables(dd);
4572 if (ret)
4573 goto bail_cleanup;
4574
4575 if (qib_mini_init)
4576 goto bail;
4577
4578 boardid = SYM_FIELD(dd->revision, Revision,
4579 BoardID);
4580 switch (boardid) {
4581 case 0:
4582 case 2:
4583 case 10:
4584 case 12:
4585 minwidth = 16; /* x16 capable boards */
4586 break;
4587 default:
4588 minwidth = 8; /* x8 capable boards */
4589 break;
4590 }
4591 if (qib_pcie_params(dd, minwidth, NULL, NULL))
4592 qib_dev_err(dd, "Failed to setup PCIe or interrupts; "
4593 "continuing anyway\n");
4594
4595 /* save IRQ for possible later use */
4596 dd->cspec->irq = pdev->irq;
4597
4598 if (qib_read_kreg64(dd, kr_hwerrstatus) &
4599 QLOGIC_IB_HWE_SERDESPLLFAILED)
4600 qib_write_kreg(dd, kr_hwerrclear,
4601 QLOGIC_IB_HWE_SERDESPLLFAILED);
4602
4603 /* setup interrupt handler (interrupt type handled above) */
4604 qib_setup_7220_interrupt(dd);
4605 qib_7220_init_hwerrors(dd);
4606
4607 /* clear diagctrl register, in case diags were running and crashed */
4608 qib_write_kreg(dd, kr_hwdiagctrl, 0);
4609
4610 goto bail;
4611
4612 bail_cleanup:
4613 qib_pcie_ddcleanup(dd);
4614 bail_free:
4615 qib_free_devdata(dd);
4616 dd = ERR_PTR(ret);
4617 bail:
4618 return dd;
4619 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree