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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
blob7ec4048731c9914c8f1385e05e3d5da613697bd0
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/module.h>
43 #include <linux/io.h>
44 #include <rdma/ib_verbs.h>
45
46 #include "qib.h"
47 #include "qib_7220.h"
48
49 static void qib_setup_7220_setextled(struct qib_pportdata *, u32);
50 static void qib_7220_handle_hwerrors(struct qib_devdata *, char *, size_t);
51 static void sendctrl_7220_mod(struct qib_pportdata *ppd, u32 op);
52 static u32 qib_7220_iblink_state(u64);
53 static u8 qib_7220_phys_portstate(u64);
54 static void qib_sdma_update_7220_tail(struct qib_pportdata *, u16);
55 static void qib_set_ib_7220_lstate(struct qib_pportdata *, u16, u16);
56
57 /*
58 * This file contains almost all the chip-specific register information and
59 * access functions for the QLogic QLogic_IB 7220 PCI-Express chip, with the
60 * exception of SerDes support, which in in qib_sd7220.c.
61 */
62
63 /* Below uses machine-generated qib_chipnum_regs.h file */
64 #define KREG_IDX(regname) (QIB_7220_##regname##_OFFS / sizeof(u64))
65
66 /* Use defines to tie machine-generated names to lower-case names */
67 #define kr_control KREG_IDX(Control)
68 #define kr_counterregbase KREG_IDX(CntrRegBase)
69 #define kr_errclear KREG_IDX(ErrClear)
70 #define kr_errmask KREG_IDX(ErrMask)
71 #define kr_errstatus KREG_IDX(ErrStatus)
72 #define kr_extctrl KREG_IDX(EXTCtrl)
73 #define kr_extstatus KREG_IDX(EXTStatus)
74 #define kr_gpio_clear KREG_IDX(GPIOClear)
75 #define kr_gpio_mask KREG_IDX(GPIOMask)
76 #define kr_gpio_out KREG_IDX(GPIOOut)
77 #define kr_gpio_status KREG_IDX(GPIOStatus)
78 #define kr_hrtbt_guid KREG_IDX(HRTBT_GUID)
79 #define kr_hwdiagctrl KREG_IDX(HwDiagCtrl)
80 #define kr_hwerrclear KREG_IDX(HwErrClear)
81 #define kr_hwerrmask KREG_IDX(HwErrMask)
82 #define kr_hwerrstatus KREG_IDX(HwErrStatus)
83 #define kr_ibcctrl KREG_IDX(IBCCtrl)
84 #define kr_ibcddrctrl KREG_IDX(IBCDDRCtrl)
85 #define kr_ibcddrstatus KREG_IDX(IBCDDRStatus)
86 #define kr_ibcstatus KREG_IDX(IBCStatus)
87 #define kr_ibserdesctrl KREG_IDX(IBSerDesCtrl)
88 #define kr_intclear KREG_IDX(IntClear)
89 #define kr_intmask KREG_IDX(IntMask)
90 #define kr_intstatus KREG_IDX(IntStatus)
91 #define kr_ncmodectrl KREG_IDX(IBNCModeCtrl)
92 #define kr_palign KREG_IDX(PageAlign)
93 #define kr_partitionkey KREG_IDX(RcvPartitionKey)
94 #define kr_portcnt KREG_IDX(PortCnt)
95 #define kr_rcvbthqp KREG_IDX(RcvBTHQP)
96 #define kr_rcvctrl KREG_IDX(RcvCtrl)
97 #define kr_rcvegrbase KREG_IDX(RcvEgrBase)
98 #define kr_rcvegrcnt KREG_IDX(RcvEgrCnt)
99 #define kr_rcvhdrcnt KREG_IDX(RcvHdrCnt)
100 #define kr_rcvhdrentsize KREG_IDX(RcvHdrEntSize)
101 #define kr_rcvhdrsize KREG_IDX(RcvHdrSize)
102 #define kr_rcvpktledcnt KREG_IDX(RcvPktLEDCnt)
103 #define kr_rcvtidbase KREG_IDX(RcvTIDBase)
104 #define kr_rcvtidcnt KREG_IDX(RcvTIDCnt)
105 #define kr_revision KREG_IDX(Revision)
106 #define kr_scratch KREG_IDX(Scratch)
107 #define kr_sendbuffererror KREG_IDX(SendBufErr0)
108 #define kr_sendctrl KREG_IDX(SendCtrl)
109 #define kr_senddmabase KREG_IDX(SendDmaBase)
110 #define kr_senddmabufmask0 KREG_IDX(SendDmaBufMask0)
111 #define kr_senddmabufmask1 (KREG_IDX(SendDmaBufMask0) + 1)
112 #define kr_senddmabufmask2 (KREG_IDX(SendDmaBufMask0) + 2)
113 #define kr_senddmahead KREG_IDX(SendDmaHead)
114 #define kr_senddmaheadaddr KREG_IDX(SendDmaHeadAddr)
115 #define kr_senddmalengen KREG_IDX(SendDmaLenGen)
116 #define kr_senddmastatus KREG_IDX(SendDmaStatus)
117 #define kr_senddmatail KREG_IDX(SendDmaTail)
118 #define kr_sendpioavailaddr KREG_IDX(SendBufAvailAddr)
119 #define kr_sendpiobufbase KREG_IDX(SendBufBase)
120 #define kr_sendpiobufcnt KREG_IDX(SendBufCnt)
121 #define kr_sendpiosize KREG_IDX(SendBufSize)
122 #define kr_sendregbase KREG_IDX(SendRegBase)
123 #define kr_userregbase KREG_IDX(UserRegBase)
124 #define kr_xgxs_cfg KREG_IDX(XGXSCfg)
125
126 /* These must only be written via qib_write_kreg_ctxt() */
127 #define kr_rcvhdraddr KREG_IDX(RcvHdrAddr0)
128 #define kr_rcvhdrtailaddr KREG_IDX(RcvHdrTailAddr0)
129
130
131 #define CREG_IDX(regname) ((QIB_7220_##regname##_OFFS - \
132 QIB_7220_LBIntCnt_OFFS) / sizeof(u64))
133
134 #define cr_badformat CREG_IDX(RxVersionErrCnt)
135 #define cr_erricrc CREG_IDX(RxICRCErrCnt)
136 #define cr_errlink CREG_IDX(RxLinkMalformCnt)
137 #define cr_errlpcrc CREG_IDX(RxLPCRCErrCnt)
138 #define cr_errpkey CREG_IDX(RxPKeyMismatchCnt)
139 #define cr_rcvflowctrl_err CREG_IDX(RxFlowCtrlViolCnt)
140 #define cr_err_rlen CREG_IDX(RxLenErrCnt)
141 #define cr_errslen CREG_IDX(TxLenErrCnt)
142 #define cr_errtidfull CREG_IDX(RxTIDFullErrCnt)
143 #define cr_errtidvalid CREG_IDX(RxTIDValidErrCnt)
144 #define cr_errvcrc CREG_IDX(RxVCRCErrCnt)
145 #define cr_ibstatuschange CREG_IDX(IBStatusChangeCnt)
146 #define cr_lbint CREG_IDX(LBIntCnt)
147 #define cr_invalidrlen CREG_IDX(RxMaxMinLenErrCnt)
148 #define cr_invalidslen CREG_IDX(TxMaxMinLenErrCnt)
149 #define cr_lbflowstall CREG_IDX(LBFlowStallCnt)
150 #define cr_pktrcv CREG_IDX(RxDataPktCnt)
151 #define cr_pktrcvflowctrl CREG_IDX(RxFlowPktCnt)
152 #define cr_pktsend CREG_IDX(TxDataPktCnt)
153 #define cr_pktsendflow CREG_IDX(TxFlowPktCnt)
154 #define cr_portovfl CREG_IDX(RxP0HdrEgrOvflCnt)
155 #define cr_rcvebp CREG_IDX(RxEBPCnt)
156 #define cr_rcvovfl CREG_IDX(RxBufOvflCnt)
157 #define cr_senddropped CREG_IDX(TxDroppedPktCnt)
158 #define cr_sendstall CREG_IDX(TxFlowStallCnt)
159 #define cr_sendunderrun CREG_IDX(TxUnderrunCnt)
160 #define cr_wordrcv CREG_IDX(RxDwordCnt)
161 #define cr_wordsend CREG_IDX(TxDwordCnt)
162 #define cr_txunsupvl CREG_IDX(TxUnsupVLErrCnt)
163 #define cr_rxdroppkt CREG_IDX(RxDroppedPktCnt)
164 #define cr_iblinkerrrecov CREG_IDX(IBLinkErrRecoveryCnt)
165 #define cr_iblinkdown CREG_IDX(IBLinkDownedCnt)
166 #define cr_ibsymbolerr CREG_IDX(IBSymbolErrCnt)
167 #define cr_vl15droppedpkt CREG_IDX(RxVL15DroppedPktCnt)
168 #define cr_rxotherlocalphyerr CREG_IDX(RxOtherLocalPhyErrCnt)
169 #define cr_excessbufferovfl CREG_IDX(ExcessBufferOvflCnt)
170 #define cr_locallinkintegrityerr CREG_IDX(LocalLinkIntegrityErrCnt)
171 #define cr_rxvlerr CREG_IDX(RxVlErrCnt)
172 #define cr_rxdlidfltr CREG_IDX(RxDlidFltrCnt)
173 #define cr_psstat CREG_IDX(PSStat)
174 #define cr_psstart CREG_IDX(PSStart)
175 #define cr_psinterval CREG_IDX(PSInterval)
176 #define cr_psrcvdatacount CREG_IDX(PSRcvDataCount)
177 #define cr_psrcvpktscount CREG_IDX(PSRcvPktsCount)
178 #define cr_psxmitdatacount CREG_IDX(PSXmitDataCount)
179 #define cr_psxmitpktscount CREG_IDX(PSXmitPktsCount)
180 #define cr_psxmitwaitcount CREG_IDX(PSXmitWaitCount)
181 #define cr_txsdmadesc CREG_IDX(TxSDmaDescCnt)
182 #define cr_pcieretrydiag CREG_IDX(PcieRetryBufDiagQwordCnt)
183
184 #define SYM_RMASK(regname, fldname) ((u64) \
185 QIB_7220_##regname##_##fldname##_RMASK)
186 #define SYM_MASK(regname, fldname) ((u64) \
187 QIB_7220_##regname##_##fldname##_RMASK << \
188 QIB_7220_##regname##_##fldname##_LSB)
189 #define SYM_LSB(regname, fldname) (QIB_7220_##regname##_##fldname##_LSB)
190 #define SYM_FIELD(value, regname, fldname) ((u64) \
191 (((value) >> SYM_LSB(regname, fldname)) & \
192 SYM_RMASK(regname, fldname)))
193 #define ERR_MASK(fldname) SYM_MASK(ErrMask, fldname##Mask)
194 #define HWE_MASK(fldname) SYM_MASK(HwErrMask, fldname##Mask)
195
196 /* ibcctrl bits */
197 #define QLOGIC_IB_IBCC_LINKINITCMD_DISABLE 1
198 /* cycle through TS1/TS2 till OK */
199 #define QLOGIC_IB_IBCC_LINKINITCMD_POLL 2
200 /* wait for TS1, then go on */
201 #define QLOGIC_IB_IBCC_LINKINITCMD_SLEEP 3
202 #define QLOGIC_IB_IBCC_LINKINITCMD_SHIFT 16
203
204 #define QLOGIC_IB_IBCC_LINKCMD_DOWN 1 /* move to 0x11 */
205 #define QLOGIC_IB_IBCC_LINKCMD_ARMED 2 /* move to 0x21 */
206 #define QLOGIC_IB_IBCC_LINKCMD_ACTIVE 3 /* move to 0x31 */
207
208 #define BLOB_7220_IBCHG 0x81
209
210 /*
211 * We could have a single register get/put routine, that takes a group type,
212 * but this is somewhat clearer and cleaner. It also gives us some error
213 * checking. 64 bit register reads should always work, but are inefficient
214 * on opteron (the northbridge always generates 2 separate HT 32 bit reads),
215 * so we use kreg32 wherever possible. User register and counter register
216 * reads are always 32 bit reads, so only one form of those routines.
217 */
218
219 /**
220 * qib_read_ureg32 - read 32-bit virtualized per-context register
221 * @dd: device
222 * @regno: register number
223 * @ctxt: context number
224 *
225 * Return the contents of a register that is virtualized to be per context.
226 * Returns -1 on errors (not distinguishable from valid contents at
227 * runtime; we may add a separate error variable at some point).
228 */
229 static inline u32 qib_read_ureg32(const struct qib_devdata *dd,
230 enum qib_ureg regno, int ctxt)
231 {
232 if (!dd->kregbase || !(dd->flags & QIB_PRESENT))
233 return 0;
234
235 if (dd->userbase)
236 return readl(regno + (u64 __iomem *)
237 ((char __iomem *)dd->userbase +
238 dd->ureg_align * ctxt));
239 else
240 return readl(regno + (u64 __iomem *)
241 (dd->uregbase +
242 (char __iomem *)dd->kregbase +
243 dd->ureg_align * ctxt));
244 }
245
246 /**
247 * qib_write_ureg - write 32-bit virtualized per-context register
248 * @dd: device
249 * @regno: register number
250 * @value: value
251 * @ctxt: context
252 *
253 * Write the contents of a register that is virtualized to be per context.
254 */
255 static inline void qib_write_ureg(const struct qib_devdata *dd,
256 enum qib_ureg regno, u64 value, int ctxt)
257 {
258 u64 __iomem *ubase;
259
260 if (dd->userbase)
261 ubase = (u64 __iomem *)
262 ((char __iomem *) dd->userbase +
263 dd->ureg_align * ctxt);
264 else
265 ubase = (u64 __iomem *)
266 (dd->uregbase +
267 (char __iomem *) dd->kregbase +
268 dd->ureg_align * ctxt);
269
270 if (dd->kregbase && (dd->flags & QIB_PRESENT))
271 writeq(value, &ubase[regno]);
272 }
273
274 /**
275 * qib_write_kreg_ctxt - write a device's per-ctxt 64-bit kernel register
276 * @dd: the qlogic_ib device
277 * @regno: the register number to write
278 * @ctxt: the context containing the register
279 * @value: the value to write
280 */
281 static inline void qib_write_kreg_ctxt(const struct qib_devdata *dd,
282 const u16 regno, unsigned ctxt,
283 u64 value)
284 {
285 qib_write_kreg(dd, regno + ctxt, value);
286 }
287
288 static inline void write_7220_creg(const struct qib_devdata *dd,
289 u16 regno, u64 value)
290 {
291 if (dd->cspec->cregbase && (dd->flags & QIB_PRESENT))
292 writeq(value, &dd->cspec->cregbase[regno]);
293 }
294
295 static inline u64 read_7220_creg(const struct qib_devdata *dd, u16 regno)
296 {
297 if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
298 return 0;
299 return readq(&dd->cspec->cregbase[regno]);
300 }
301
302 static inline u32 read_7220_creg32(const struct qib_devdata *dd, u16 regno)
303 {
304 if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
305 return 0;
306 return readl(&dd->cspec->cregbase[regno]);
307 }
308
309 /* kr_revision bits */
310 #define QLOGIC_IB_R_EMULATORREV_MASK ((1ULL << 22) - 1)
311 #define QLOGIC_IB_R_EMULATORREV_SHIFT 40
312
313 /* kr_control bits */
314 #define QLOGIC_IB_C_RESET (1U << 7)
315
316 /* kr_intstatus, kr_intclear, kr_intmask bits */
317 #define QLOGIC_IB_I_RCVURG_MASK ((1ULL << 17) - 1)
318 #define QLOGIC_IB_I_RCVURG_SHIFT 32
319 #define QLOGIC_IB_I_RCVAVAIL_MASK ((1ULL << 17) - 1)
320 #define QLOGIC_IB_I_RCVAVAIL_SHIFT 0
321 #define QLOGIC_IB_I_SERDESTRIMDONE (1ULL << 27)
322
323 #define QLOGIC_IB_C_FREEZEMODE 0x00000002
324 #define QLOGIC_IB_C_LINKENABLE 0x00000004
325
326 #define QLOGIC_IB_I_SDMAINT 0x8000000000000000ULL
327 #define QLOGIC_IB_I_SDMADISABLED 0x4000000000000000ULL
328 #define QLOGIC_IB_I_ERROR 0x0000000080000000ULL
329 #define QLOGIC_IB_I_SPIOSENT 0x0000000040000000ULL
330 #define QLOGIC_IB_I_SPIOBUFAVAIL 0x0000000020000000ULL
331 #define QLOGIC_IB_I_GPIO 0x0000000010000000ULL
332
333 /* variables for sanity checking interrupt and errors */
334 #define QLOGIC_IB_I_BITSEXTANT \
335 (QLOGIC_IB_I_SDMAINT | QLOGIC_IB_I_SDMADISABLED | \
336 (QLOGIC_IB_I_RCVURG_MASK << QLOGIC_IB_I_RCVURG_SHIFT) | \
337 (QLOGIC_IB_I_RCVAVAIL_MASK << \
338 QLOGIC_IB_I_RCVAVAIL_SHIFT) | \
339 QLOGIC_IB_I_ERROR | QLOGIC_IB_I_SPIOSENT | \
340 QLOGIC_IB_I_SPIOBUFAVAIL | QLOGIC_IB_I_GPIO | \
341 QLOGIC_IB_I_SERDESTRIMDONE)
342
343 #define IB_HWE_BITSEXTANT \
344 (HWE_MASK(RXEMemParityErr) | \
345 HWE_MASK(TXEMemParityErr) | \
346 (QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK << \
347 QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT) | \
348 QLOGIC_IB_HWE_PCIE1PLLFAILED | \
349 QLOGIC_IB_HWE_PCIE0PLLFAILED | \
350 QLOGIC_IB_HWE_PCIEPOISONEDTLP | \
351 QLOGIC_IB_HWE_PCIECPLTIMEOUT | \
352 QLOGIC_IB_HWE_PCIEBUSPARITYXTLH | \
353 QLOGIC_IB_HWE_PCIEBUSPARITYXADM | \
354 QLOGIC_IB_HWE_PCIEBUSPARITYRADM | \
355 HWE_MASK(PowerOnBISTFailed) | \
356 QLOGIC_IB_HWE_COREPLL_FBSLIP | \
357 QLOGIC_IB_HWE_COREPLL_RFSLIP | \
358 QLOGIC_IB_HWE_SERDESPLLFAILED | \
359 HWE_MASK(IBCBusToSPCParityErr) | \
360 HWE_MASK(IBCBusFromSPCParityErr) | \
361 QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR | \
362 QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR | \
363 QLOGIC_IB_HWE_SDMAMEMREADERR | \
364 QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED | \
365 QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT | \
366 QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT | \
367 QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT | \
368 QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT | \
369 QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR | \
370 QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR | \
371 QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR | \
372 QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR)
373
374 #define IB_E_BITSEXTANT \
375 (ERR_MASK(RcvFormatErr) | ERR_MASK(RcvVCRCErr) | \
376 ERR_MASK(RcvICRCErr) | ERR_MASK(RcvMinPktLenErr) | \
377 ERR_MASK(RcvMaxPktLenErr) | ERR_MASK(RcvLongPktLenErr) | \
378 ERR_MASK(RcvShortPktLenErr) | ERR_MASK(RcvUnexpectedCharErr) | \
379 ERR_MASK(RcvUnsupportedVLErr) | ERR_MASK(RcvEBPErr) | \
380 ERR_MASK(RcvIBFlowErr) | ERR_MASK(RcvBadVersionErr) | \
381 ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr) | \
382 ERR_MASK(RcvBadTidErr) | ERR_MASK(RcvHdrLenErr) | \
383 ERR_MASK(RcvHdrErr) | ERR_MASK(RcvIBLostLinkErr) | \
384 ERR_MASK(SendSpecialTriggerErr) | \
385 ERR_MASK(SDmaDisabledErr) | ERR_MASK(SendMinPktLenErr) | \
386 ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendUnderRunErr) | \
387 ERR_MASK(SendPktLenErr) | ERR_MASK(SendDroppedSmpPktErr) | \
388 ERR_MASK(SendDroppedDataPktErr) | \
389 ERR_MASK(SendPioArmLaunchErr) | \
390 ERR_MASK(SendUnexpectedPktNumErr) | \
391 ERR_MASK(SendUnsupportedVLErr) | ERR_MASK(SendBufMisuseErr) | \
392 ERR_MASK(SDmaGenMismatchErr) | ERR_MASK(SDmaOutOfBoundErr) | \
393 ERR_MASK(SDmaTailOutOfBoundErr) | ERR_MASK(SDmaBaseErr) | \
394 ERR_MASK(SDma1stDescErr) | ERR_MASK(SDmaRpyTagErr) | \
395 ERR_MASK(SDmaDwEnErr) | ERR_MASK(SDmaMissingDwErr) | \
396 ERR_MASK(SDmaUnexpDataErr) | \
397 ERR_MASK(IBStatusChanged) | ERR_MASK(InvalidAddrErr) | \
398 ERR_MASK(ResetNegated) | ERR_MASK(HardwareErr) | \
399 ERR_MASK(SDmaDescAddrMisalignErr) | \
400 ERR_MASK(InvalidEEPCmd))
401
402 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
403 #define QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK 0x00000000000000ffULL
404 #define QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT 0
405 #define QLOGIC_IB_HWE_PCIEPOISONEDTLP 0x0000000010000000ULL
406 #define QLOGIC_IB_HWE_PCIECPLTIMEOUT 0x0000000020000000ULL
407 #define QLOGIC_IB_HWE_PCIEBUSPARITYXTLH 0x0000000040000000ULL
408 #define QLOGIC_IB_HWE_PCIEBUSPARITYXADM 0x0000000080000000ULL
409 #define QLOGIC_IB_HWE_PCIEBUSPARITYRADM 0x0000000100000000ULL
410 #define QLOGIC_IB_HWE_COREPLL_FBSLIP 0x0080000000000000ULL
411 #define QLOGIC_IB_HWE_COREPLL_RFSLIP 0x0100000000000000ULL
412 #define QLOGIC_IB_HWE_PCIE1PLLFAILED 0x0400000000000000ULL
413 #define QLOGIC_IB_HWE_PCIE0PLLFAILED 0x0800000000000000ULL
414 #define QLOGIC_IB_HWE_SERDESPLLFAILED 0x1000000000000000ULL
415 /* specific to this chip */
416 #define QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR 0x0000000000000040ULL
417 #define QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR 0x0000000000000080ULL
418 #define QLOGIC_IB_HWE_SDMAMEMREADERR 0x0000000010000000ULL
419 #define QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED 0x2000000000000000ULL
420 #define QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT 0x0100000000000000ULL
421 #define QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT 0x0200000000000000ULL
422 #define QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT 0x0400000000000000ULL
423 #define QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT 0x0800000000000000ULL
424 #define QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR 0x0000008000000000ULL
425 #define QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR 0x0000004000000000ULL
426 #define QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR 0x0000001000000000ULL
427 #define QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR 0x0000002000000000ULL
428
429 #define IBA7220_IBCC_LINKCMD_SHIFT 19
430
431 /* kr_ibcddrctrl bits */
432 #define IBA7220_IBC_DLIDLMC_MASK 0xFFFFFFFFUL
433 #define IBA7220_IBC_DLIDLMC_SHIFT 32
434
435 #define IBA7220_IBC_HRTBT_MASK (SYM_RMASK(IBCDDRCtrl, HRTBT_AUTO) | \
436 SYM_RMASK(IBCDDRCtrl, HRTBT_ENB))
437 #define IBA7220_IBC_HRTBT_SHIFT SYM_LSB(IBCDDRCtrl, HRTBT_ENB)
438
439 #define IBA7220_IBC_LANE_REV_SUPPORTED (1<<8)
440 #define IBA7220_IBC_LREV_MASK 1
441 #define IBA7220_IBC_LREV_SHIFT 8
442 #define IBA7220_IBC_RXPOL_MASK 1
443 #define IBA7220_IBC_RXPOL_SHIFT 7
444 #define IBA7220_IBC_WIDTH_SHIFT 5
445 #define IBA7220_IBC_WIDTH_MASK 0x3
446 #define IBA7220_IBC_WIDTH_1X_ONLY (0 << IBA7220_IBC_WIDTH_SHIFT)
447 #define IBA7220_IBC_WIDTH_4X_ONLY (1 << IBA7220_IBC_WIDTH_SHIFT)
448 #define IBA7220_IBC_WIDTH_AUTONEG (2 << IBA7220_IBC_WIDTH_SHIFT)
449 #define IBA7220_IBC_SPEED_AUTONEG (1 << 1)
450 #define IBA7220_IBC_SPEED_SDR (1 << 2)
451 #define IBA7220_IBC_SPEED_DDR (1 << 3)
452 #define IBA7220_IBC_SPEED_AUTONEG_MASK (0x7 << 1)
453 #define IBA7220_IBC_IBTA_1_2_MASK (1)
454
455 /* kr_ibcddrstatus */
456 /* link latency shift is 0, don't bother defining */
457 #define IBA7220_DDRSTAT_LINKLAT_MASK 0x3ffffff
458
459 /* kr_extstatus bits */
460 #define QLOGIC_IB_EXTS_FREQSEL 0x2
461 #define QLOGIC_IB_EXTS_SERDESSEL 0x4
462 #define QLOGIC_IB_EXTS_MEMBIST_ENDTEST 0x0000000000004000
463 #define QLOGIC_IB_EXTS_MEMBIST_DISABLED 0x0000000000008000
464
465 /* kr_xgxsconfig bits */
466 #define QLOGIC_IB_XGXS_RESET 0x5ULL
467 #define QLOGIC_IB_XGXS_FC_SAFE (1ULL << 63)
468
469 /* kr_rcvpktledcnt */
470 #define IBA7220_LEDBLINK_ON_SHIFT 32 /* 4ns period on after packet */
471 #define IBA7220_LEDBLINK_OFF_SHIFT 0 /* 4ns period off before next on */
472
473 #define _QIB_GPIO_SDA_NUM 1
474 #define _QIB_GPIO_SCL_NUM 0
475 #define QIB_TWSI_EEPROM_DEV 0xA2 /* All Production 7220 cards. */
476 #define QIB_TWSI_TEMP_DEV 0x98
477
478 /* HW counter clock is at 4nsec */
479 #define QIB_7220_PSXMITWAIT_CHECK_RATE 4000
480
481 #define IBA7220_R_INTRAVAIL_SHIFT 17
482 #define IBA7220_R_PKEY_DIS_SHIFT 34
483 #define IBA7220_R_TAILUPD_SHIFT 35
484 #define IBA7220_R_CTXTCFG_SHIFT 36
485
486 #define IBA7220_HDRHEAD_PKTINT_SHIFT 32 /* interrupt cnt in upper 32 bits */
487
488 /*
489 * the size bits give us 2^N, in KB units. 0 marks as invalid,
490 * and 7 is reserved. We currently use only 2KB and 4KB
491 */
492 #define IBA7220_TID_SZ_SHIFT 37 /* shift to 3bit size selector */
493 #define IBA7220_TID_SZ_2K (1UL << IBA7220_TID_SZ_SHIFT) /* 2KB */
494 #define IBA7220_TID_SZ_4K (2UL << IBA7220_TID_SZ_SHIFT) /* 4KB */
495 #define IBA7220_TID_PA_SHIFT 11U /* TID addr in chip stored w/o low bits */
496 #define PBC_7220_VL15_SEND (1ULL << 63) /* pbc; VL15, no credit check */
497 #define PBC_7220_VL15_SEND_CTRL (1ULL << 31) /* control version of same */
498
499 #define AUTONEG_TRIES 5 /* sequential retries to negotiate DDR */
500
501 /* packet rate matching delay multiplier */
502 static u8 rate_to_delay[2][2] = {
503 /* 1x, 4x */
504 { 8, 2 }, /* SDR */
505 { 4, 1 } /* DDR */
506 };
507
508 static u8 ib_rate_to_delay[IB_RATE_120_GBPS + 1] = {
509 [IB_RATE_2_5_GBPS] = 8,
510 [IB_RATE_5_GBPS] = 4,
511 [IB_RATE_10_GBPS] = 2,
512 [IB_RATE_20_GBPS] = 1
513 };
514
515 #define IBA7220_LINKSPEED_SHIFT SYM_LSB(IBCStatus, LinkSpeedActive)
516 #define IBA7220_LINKWIDTH_SHIFT SYM_LSB(IBCStatus, LinkWidthActive)
517
518 /* link training states, from IBC */
519 #define IB_7220_LT_STATE_DISABLED 0x00
520 #define IB_7220_LT_STATE_LINKUP 0x01
521 #define IB_7220_LT_STATE_POLLACTIVE 0x02
522 #define IB_7220_LT_STATE_POLLQUIET 0x03
523 #define IB_7220_LT_STATE_SLEEPDELAY 0x04
524 #define IB_7220_LT_STATE_SLEEPQUIET 0x05
525 #define IB_7220_LT_STATE_CFGDEBOUNCE 0x08
526 #define IB_7220_LT_STATE_CFGRCVFCFG 0x09
527 #define IB_7220_LT_STATE_CFGWAITRMT 0x0a
528 #define IB_7220_LT_STATE_CFGIDLE 0x0b
529 #define IB_7220_LT_STATE_RECOVERRETRAIN 0x0c
530 #define IB_7220_LT_STATE_RECOVERWAITRMT 0x0e
531 #define IB_7220_LT_STATE_RECOVERIDLE 0x0f
532
533 /* link state machine states from IBC */
534 #define IB_7220_L_STATE_DOWN 0x0
535 #define IB_7220_L_STATE_INIT 0x1
536 #define IB_7220_L_STATE_ARM 0x2
537 #define IB_7220_L_STATE_ACTIVE 0x3
538 #define IB_7220_L_STATE_ACT_DEFER 0x4
539
540 static const u8 qib_7220_physportstate[0x20] = {
541 [IB_7220_LT_STATE_DISABLED] = IB_PHYSPORTSTATE_DISABLED,
542 [IB_7220_LT_STATE_LINKUP] = IB_PHYSPORTSTATE_LINKUP,
543 [IB_7220_LT_STATE_POLLACTIVE] = IB_PHYSPORTSTATE_POLL,
544 [IB_7220_LT_STATE_POLLQUIET] = IB_PHYSPORTSTATE_POLL,
545 [IB_7220_LT_STATE_SLEEPDELAY] = IB_PHYSPORTSTATE_SLEEP,
546 [IB_7220_LT_STATE_SLEEPQUIET] = IB_PHYSPORTSTATE_SLEEP,
547 [IB_7220_LT_STATE_CFGDEBOUNCE] =
548 IB_PHYSPORTSTATE_CFG_TRAIN,
549 [IB_7220_LT_STATE_CFGRCVFCFG] =
550 IB_PHYSPORTSTATE_CFG_TRAIN,
551 [IB_7220_LT_STATE_CFGWAITRMT] =
552 IB_PHYSPORTSTATE_CFG_TRAIN,
553 [IB_7220_LT_STATE_CFGIDLE] = IB_PHYSPORTSTATE_CFG_TRAIN,
554 [IB_7220_LT_STATE_RECOVERRETRAIN] =
555 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
556 [IB_7220_LT_STATE_RECOVERWAITRMT] =
557 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
558 [IB_7220_LT_STATE_RECOVERIDLE] =
559 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
560 [0x10] = IB_PHYSPORTSTATE_CFG_TRAIN,
561 [0x11] = IB_PHYSPORTSTATE_CFG_TRAIN,
562 [0x12] = IB_PHYSPORTSTATE_CFG_TRAIN,
563 [0x13] = IB_PHYSPORTSTATE_CFG_TRAIN,
564 [0x14] = IB_PHYSPORTSTATE_CFG_TRAIN,
565 [0x15] = IB_PHYSPORTSTATE_CFG_TRAIN,
566 [0x16] = IB_PHYSPORTSTATE_CFG_TRAIN,
567 [0x17] = IB_PHYSPORTSTATE_CFG_TRAIN
568 };
569
570 int qib_special_trigger;
571 module_param_named(special_trigger, qib_special_trigger, int, S_IRUGO);
572 MODULE_PARM_DESC(special_trigger, "Enable SpecialTrigger arm/launch");
573
574 #define IBCBUSFRSPCPARITYERR HWE_MASK(IBCBusFromSPCParityErr)
575 #define IBCBUSTOSPCPARITYERR HWE_MASK(IBCBusToSPCParityErr)
576
577 #define SYM_MASK_BIT(regname, fldname, bit) ((u64) \
578 (1ULL << (SYM_LSB(regname, fldname) + (bit))))
579
580 #define TXEMEMPARITYERR_PIOBUF \
581 SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 0)
582 #define TXEMEMPARITYERR_PIOPBC \
583 SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 1)
584 #define TXEMEMPARITYERR_PIOLAUNCHFIFO \
585 SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 2)
586
587 #define RXEMEMPARITYERR_RCVBUF \
588 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 0)
589 #define RXEMEMPARITYERR_LOOKUPQ \
590 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 1)
591 #define RXEMEMPARITYERR_EXPTID \
592 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 2)
593 #define RXEMEMPARITYERR_EAGERTID \
594 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 3)
595 #define RXEMEMPARITYERR_FLAGBUF \
596 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 4)
597 #define RXEMEMPARITYERR_DATAINFO \
598 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 5)
599 #define RXEMEMPARITYERR_HDRINFO \
600 SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 6)
601
602 /* 7220 specific hardware errors... */
603 static const struct qib_hwerror_msgs qib_7220_hwerror_msgs[] = {
604 /* generic hardware errors */
605 QLOGIC_IB_HWE_MSG(IBCBUSFRSPCPARITYERR, "QIB2IB Parity"),
606 QLOGIC_IB_HWE_MSG(IBCBUSTOSPCPARITYERR, "IB2QIB Parity"),
607
608 QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOBUF,
609 "TXE PIOBUF Memory Parity"),
610 QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOPBC,
611 "TXE PIOPBC Memory Parity"),
612 QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOLAUNCHFIFO,
613 "TXE PIOLAUNCHFIFO Memory Parity"),
614
615 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_RCVBUF,
616 "RXE RCVBUF Memory Parity"),
617 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_LOOKUPQ,
618 "RXE LOOKUPQ Memory Parity"),
619 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_EAGERTID,
620 "RXE EAGERTID Memory Parity"),
621 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_EXPTID,
622 "RXE EXPTID Memory Parity"),
623 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_FLAGBUF,
624 "RXE FLAGBUF Memory Parity"),
625 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_DATAINFO,
626 "RXE DATAINFO Memory Parity"),
627 QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_HDRINFO,
628 "RXE HDRINFO Memory Parity"),
629
630 /* chip-specific hardware errors */
631 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEPOISONEDTLP,
632 "PCIe Poisoned TLP"),
633 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLTIMEOUT,
634 "PCIe completion timeout"),
635 /*
636 * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
637 * parity or memory parity error failures, because most likely we
638 * won't be able to talk to the core of the chip. Nonetheless, we
639 * might see them, if they are in parts of the PCIe core that aren't
640 * essential.
641 */
642 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE1PLLFAILED,
643 "PCIePLL1"),
644 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE0PLLFAILED,
645 "PCIePLL0"),
646 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYXTLH,
647 "PCIe XTLH core parity"),
648 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYXADM,
649 "PCIe ADM TX core parity"),
650 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYRADM,
651 "PCIe ADM RX core parity"),
652 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_SERDESPLLFAILED,
653 "SerDes PLL"),
654 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR,
655 "PCIe cpl header queue"),
656 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR,
657 "PCIe cpl data queue"),
658 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_SDMAMEMREADERR,
659 "Send DMA memory read"),
660 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED,
661 "uC PLL clock not locked"),
662 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT,
663 "PCIe serdes Q0 no clock"),
664 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT,
665 "PCIe serdes Q1 no clock"),
666 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT,
667 "PCIe serdes Q2 no clock"),
668 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT,
669 "PCIe serdes Q3 no clock"),
670 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR,
671 "DDS RXEQ memory parity"),
672 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR,
673 "IB uC memory parity"),
674 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR,
675 "PCIe uC oct0 memory parity"),
676 QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR,
677 "PCIe uC oct1 memory parity"),
678 };
679
680 #define RXE_PARITY (RXEMEMPARITYERR_EAGERTID|RXEMEMPARITYERR_EXPTID)
681
682 #define QLOGIC_IB_E_PKTERRS (\
683 ERR_MASK(SendPktLenErr) | \
684 ERR_MASK(SendDroppedDataPktErr) | \
685 ERR_MASK(RcvVCRCErr) | \
686 ERR_MASK(RcvICRCErr) | \
687 ERR_MASK(RcvShortPktLenErr) | \
688 ERR_MASK(RcvEBPErr))
689
690 /* Convenience for decoding Send DMA errors */
691 #define QLOGIC_IB_E_SDMAERRS ( \
692 ERR_MASK(SDmaGenMismatchErr) | \
693 ERR_MASK(SDmaOutOfBoundErr) | \
694 ERR_MASK(SDmaTailOutOfBoundErr) | ERR_MASK(SDmaBaseErr) | \
695 ERR_MASK(SDma1stDescErr) | ERR_MASK(SDmaRpyTagErr) | \
696 ERR_MASK(SDmaDwEnErr) | ERR_MASK(SDmaMissingDwErr) | \
697 ERR_MASK(SDmaUnexpDataErr) | \
698 ERR_MASK(SDmaDescAddrMisalignErr) | \
699 ERR_MASK(SDmaDisabledErr) | \
700 ERR_MASK(SendBufMisuseErr))
701
702 /* These are all rcv-related errors which we want to count for stats */
703 #define E_SUM_PKTERRS \
704 (ERR_MASK(RcvHdrLenErr) | ERR_MASK(RcvBadTidErr) | \
705 ERR_MASK(RcvBadVersionErr) | ERR_MASK(RcvHdrErr) | \
706 ERR_MASK(RcvLongPktLenErr) | ERR_MASK(RcvShortPktLenErr) | \
707 ERR_MASK(RcvMaxPktLenErr) | ERR_MASK(RcvMinPktLenErr) | \
708 ERR_MASK(RcvFormatErr) | ERR_MASK(RcvUnsupportedVLErr) | \
709 ERR_MASK(RcvUnexpectedCharErr) | ERR_MASK(RcvEBPErr))
710
711 /* These are all send-related errors which we want to count for stats */
712 #define E_SUM_ERRS \
713 (ERR_MASK(SendPioArmLaunchErr) | ERR_MASK(SendUnexpectedPktNumErr) | \
714 ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
715 ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendUnsupportedVLErr) | \
716 ERR_MASK(SendMinPktLenErr) | ERR_MASK(SendPktLenErr) | \
717 ERR_MASK(InvalidAddrErr))
718
719 /*
720 * this is similar to E_SUM_ERRS, but can't ignore armlaunch, don't ignore
721 * errors not related to freeze and cancelling buffers. Can't ignore
722 * armlaunch because could get more while still cleaning up, and need
723 * to cancel those as they happen.
724 */
725 #define E_SPKT_ERRS_IGNORE \
726 (ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
727 ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendMinPktLenErr) | \
728 ERR_MASK(SendPktLenErr))
729
730 /*
731 * these are errors that can occur when the link changes state while
732 * a packet is being sent or received. This doesn't cover things
733 * like EBP or VCRC that can be the result of a sending having the
734 * link change state, so we receive a "known bad" packet.
735 */
736 #define E_SUM_LINK_PKTERRS \
737 (ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
738 ERR_MASK(SendMinPktLenErr) | ERR_MASK(SendPktLenErr) | \
739 ERR_MASK(RcvShortPktLenErr) | ERR_MASK(RcvMinPktLenErr) | \
740 ERR_MASK(RcvUnexpectedCharErr))
741
742 static void autoneg_7220_work(struct work_struct *);
743 static u32 __iomem *qib_7220_getsendbuf(struct qib_pportdata *, u64, u32 *);
744
745 /*
746 * Called when we might have an error that is specific to a particular
747 * PIO buffer, and may need to cancel that buffer, so it can be re-used.
748 * because we don't need to force the update of pioavail.
749 */
750 static void qib_disarm_7220_senderrbufs(struct qib_pportdata *ppd)
751 {
752 unsigned long sbuf[3];
753 struct qib_devdata *dd = ppd->dd;
754
755 /*
756 * It's possible that sendbuffererror could have bits set; might
757 * have already done this as a result of hardware error handling.
758 */
759 /* read these before writing errorclear */
760 sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
761 sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
762 sbuf[2] = qib_read_kreg64(dd, kr_sendbuffererror + 2);
763
764 if (sbuf[0] || sbuf[1] || sbuf[2])
765 qib_disarm_piobufs_set(dd, sbuf,
766 dd->piobcnt2k + dd->piobcnt4k);
767 }
768
769 static void qib_7220_txe_recover(struct qib_devdata *dd)
770 {
771 qib_devinfo(dd->pcidev, "Recovering from TXE PIO parity error\n");
772 qib_disarm_7220_senderrbufs(dd->pport);
773 }
774
775 /*
776 * This is called with interrupts disabled and sdma_lock held.
777 */
778 static void qib_7220_sdma_sendctrl(struct qib_pportdata *ppd, unsigned op)
779 {
780 struct qib_devdata *dd = ppd->dd;
781 u64 set_sendctrl = 0;
782 u64 clr_sendctrl = 0;
783
784 if (op & QIB_SDMA_SENDCTRL_OP_ENABLE)
785 set_sendctrl |= SYM_MASK(SendCtrl, SDmaEnable);
786 else
787 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaEnable);
788
789 if (op & QIB_SDMA_SENDCTRL_OP_INTENABLE)
790 set_sendctrl |= SYM_MASK(SendCtrl, SDmaIntEnable);
791 else
792 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaIntEnable);
793
794 if (op & QIB_SDMA_SENDCTRL_OP_HALT)
795 set_sendctrl |= SYM_MASK(SendCtrl, SDmaHalt);
796 else
797 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaHalt);
798
799 spin_lock(&dd->sendctrl_lock);
800
801 dd->sendctrl |= set_sendctrl;
802 dd->sendctrl &= ~clr_sendctrl;
803
804 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
805 qib_write_kreg(dd, kr_scratch, 0);
806
807 spin_unlock(&dd->sendctrl_lock);
808 }
809
810 static void qib_decode_7220_sdma_errs(struct qib_pportdata *ppd,
811 u64 err, char *buf, size_t blen)
812 {
813 static const struct {
814 u64 err;
815 const char *msg;
816 } errs[] = {
817 { ERR_MASK(SDmaGenMismatchErr),
818 "SDmaGenMismatch" },
819 { ERR_MASK(SDmaOutOfBoundErr),
820 "SDmaOutOfBound" },
821 { ERR_MASK(SDmaTailOutOfBoundErr),
822 "SDmaTailOutOfBound" },
823 { ERR_MASK(SDmaBaseErr),
824 "SDmaBase" },
825 { ERR_MASK(SDma1stDescErr),
826 "SDma1stDesc" },
827 { ERR_MASK(SDmaRpyTagErr),
828 "SDmaRpyTag" },
829 { ERR_MASK(SDmaDwEnErr),
830 "SDmaDwEn" },
831 { ERR_MASK(SDmaMissingDwErr),
832 "SDmaMissingDw" },
833 { ERR_MASK(SDmaUnexpDataErr),
834 "SDmaUnexpData" },
835 { ERR_MASK(SDmaDescAddrMisalignErr),
836 "SDmaDescAddrMisalign" },
837 { ERR_MASK(SendBufMisuseErr),
838 "SendBufMisuse" },
839 { ERR_MASK(SDmaDisabledErr),
840 "SDmaDisabled" },
841 };
842 int i;
843 size_t bidx = 0;
844
845 for (i = 0; i < ARRAY_SIZE(errs); i++) {
846 if (err & errs[i].err)
847 bidx += scnprintf(buf + bidx, blen - bidx,
848 "%s ", errs[i].msg);
849 }
850 }
851
852 /*
853 * This is called as part of link down clean up so disarm and flush
854 * all send buffers so that SMP packets can be sent.
855 */
856 static void qib_7220_sdma_hw_clean_up(struct qib_pportdata *ppd)
857 {
858 /* This will trigger the Abort interrupt */
859 sendctrl_7220_mod(ppd, QIB_SENDCTRL_DISARM_ALL | QIB_SENDCTRL_FLUSH |
860 QIB_SENDCTRL_AVAIL_BLIP);
861 ppd->dd->upd_pio_shadow = 1; /* update our idea of what's busy */
862 }
863
864 static void qib_sdma_7220_setlengen(struct qib_pportdata *ppd)
865 {
866 /*
867 * Set SendDmaLenGen and clear and set
868 * the MSB of the generation count to enable generation checking
869 * and load the internal generation counter.
870 */
871 qib_write_kreg(ppd->dd, kr_senddmalengen, ppd->sdma_descq_cnt);
872 qib_write_kreg(ppd->dd, kr_senddmalengen,
873 ppd->sdma_descq_cnt |
874 (1ULL << QIB_7220_SendDmaLenGen_Generation_MSB));
875 }
876
877 static void qib_7220_sdma_hw_start_up(struct qib_pportdata *ppd)
878 {
879 qib_sdma_7220_setlengen(ppd);
880 qib_sdma_update_7220_tail(ppd, 0); /* Set SendDmaTail */
881 ppd->sdma_head_dma[0] = 0;
882 }
883
884 #define DISABLES_SDMA ( \
885 ERR_MASK(SDmaDisabledErr) | \
886 ERR_MASK(SDmaBaseErr) | \
887 ERR_MASK(SDmaTailOutOfBoundErr) | \
888 ERR_MASK(SDmaOutOfBoundErr) | \
889 ERR_MASK(SDma1stDescErr) | \
890 ERR_MASK(SDmaRpyTagErr) | \
891 ERR_MASK(SDmaGenMismatchErr) | \
892 ERR_MASK(SDmaDescAddrMisalignErr) | \
893 ERR_MASK(SDmaMissingDwErr) | \
894 ERR_MASK(SDmaDwEnErr))
895
896 static void sdma_7220_errors(struct qib_pportdata *ppd, u64 errs)
897 {
898 unsigned long flags;
899 struct qib_devdata *dd = ppd->dd;
900 char *msg;
901
902 errs &= QLOGIC_IB_E_SDMAERRS;
903
904 msg = dd->cspec->sdmamsgbuf;
905 qib_decode_7220_sdma_errs(ppd, errs, msg, sizeof dd->cspec->sdmamsgbuf);
906 spin_lock_irqsave(&ppd->sdma_lock, flags);
907
908 if (errs & ERR_MASK(SendBufMisuseErr)) {
909 unsigned long sbuf[3];
910
911 sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
912 sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
913 sbuf[2] = qib_read_kreg64(dd, kr_sendbuffererror + 2);
914
915 qib_dev_err(ppd->dd,
916 "IB%u:%u SendBufMisuse: %04lx %016lx %016lx\n",
917 ppd->dd->unit, ppd->port, sbuf[2], sbuf[1],
918 sbuf[0]);
919 }
920
921 if (errs & ERR_MASK(SDmaUnexpDataErr))
922 qib_dev_err(dd, "IB%u:%u SDmaUnexpData\n", ppd->dd->unit,
923 ppd->port);
924
925 switch (ppd->sdma_state.current_state) {
926 case qib_sdma_state_s00_hw_down:
927 /* not expecting any interrupts */
928 break;
929
930 case qib_sdma_state_s10_hw_start_up_wait:
931 /* handled in intr path */
932 break;
933
934 case qib_sdma_state_s20_idle:
935 /* not expecting any interrupts */
936 break;
937
938 case qib_sdma_state_s30_sw_clean_up_wait:
939 /* not expecting any interrupts */
940 break;
941
942 case qib_sdma_state_s40_hw_clean_up_wait:
943 if (errs & ERR_MASK(SDmaDisabledErr))
944 __qib_sdma_process_event(ppd,
945 qib_sdma_event_e50_hw_cleaned);
946 break;
947
948 case qib_sdma_state_s50_hw_halt_wait:
949 /* handled in intr path */
950 break;
951
952 case qib_sdma_state_s99_running:
953 if (errs & DISABLES_SDMA)
954 __qib_sdma_process_event(ppd,
955 qib_sdma_event_e7220_err_halted);
956 break;
957 }
958
959 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
960 }
961
962 /*
963 * Decode the error status into strings, deciding whether to always
964 * print * it or not depending on "normal packet errors" vs everything
965 * else. Return 1 if "real" errors, otherwise 0 if only packet
966 * errors, so caller can decide what to print with the string.
967 */
968 static int qib_decode_7220_err(struct qib_devdata *dd, char *buf, size_t blen,
969 u64 err)
970 {
971 int iserr = 1;
972
973 *buf = '\0';
974 if (err & QLOGIC_IB_E_PKTERRS) {
975 if (!(err & ~QLOGIC_IB_E_PKTERRS))
976 iserr = 0;
977 if ((err & ERR_MASK(RcvICRCErr)) &&
978 !(err & (ERR_MASK(RcvVCRCErr) | ERR_MASK(RcvEBPErr))))
979 strlcat(buf, "CRC ", blen);
980 if (!iserr)
981 goto done;
982 }
983 if (err & ERR_MASK(RcvHdrLenErr))
984 strlcat(buf, "rhdrlen ", blen);
985 if (err & ERR_MASK(RcvBadTidErr))
986 strlcat(buf, "rbadtid ", blen);
987 if (err & ERR_MASK(RcvBadVersionErr))
988 strlcat(buf, "rbadversion ", blen);
989 if (err & ERR_MASK(RcvHdrErr))
990 strlcat(buf, "rhdr ", blen);
991 if (err & ERR_MASK(SendSpecialTriggerErr))
992 strlcat(buf, "sendspecialtrigger ", blen);
993 if (err & ERR_MASK(RcvLongPktLenErr))
994 strlcat(buf, "rlongpktlen ", blen);
995 if (err & ERR_MASK(RcvMaxPktLenErr))
996 strlcat(buf, "rmaxpktlen ", blen);
997 if (err & ERR_MASK(RcvMinPktLenErr))
998 strlcat(buf, "rminpktlen ", blen);
999 if (err & ERR_MASK(SendMinPktLenErr))
1000 strlcat(buf, "sminpktlen ", blen);
1001 if (err & ERR_MASK(RcvFormatErr))
1002 strlcat(buf, "rformaterr ", blen);
1003 if (err & ERR_MASK(RcvUnsupportedVLErr))
1004 strlcat(buf, "runsupvl ", blen);
1005 if (err & ERR_MASK(RcvUnexpectedCharErr))
1006 strlcat(buf, "runexpchar ", blen);
1007 if (err & ERR_MASK(RcvIBFlowErr))
1008 strlcat(buf, "ribflow ", blen);
1009 if (err & ERR_MASK(SendUnderRunErr))
1010 strlcat(buf, "sunderrun ", blen);
1011 if (err & ERR_MASK(SendPioArmLaunchErr))
1012 strlcat(buf, "spioarmlaunch ", blen);
1013 if (err & ERR_MASK(SendUnexpectedPktNumErr))
1014 strlcat(buf, "sunexperrpktnum ", blen);
1015 if (err & ERR_MASK(SendDroppedSmpPktErr))
1016 strlcat(buf, "sdroppedsmppkt ", blen);
1017 if (err & ERR_MASK(SendMaxPktLenErr))
1018 strlcat(buf, "smaxpktlen ", blen);
1019 if (err & ERR_MASK(SendUnsupportedVLErr))
1020 strlcat(buf, "sunsupVL ", blen);
1021 if (err & ERR_MASK(InvalidAddrErr))
1022 strlcat(buf, "invalidaddr ", blen);
1023 if (err & ERR_MASK(RcvEgrFullErr))
1024 strlcat(buf, "rcvegrfull ", blen);
1025 if (err & ERR_MASK(RcvHdrFullErr))
1026 strlcat(buf, "rcvhdrfull ", blen);
1027 if (err & ERR_MASK(IBStatusChanged))
1028 strlcat(buf, "ibcstatuschg ", blen);
1029 if (err & ERR_MASK(RcvIBLostLinkErr))
1030 strlcat(buf, "riblostlink ", blen);
1031 if (err & ERR_MASK(HardwareErr))
1032 strlcat(buf, "hardware ", blen);
1033 if (err & ERR_MASK(ResetNegated))
1034 strlcat(buf, "reset ", blen);
1035 if (err & QLOGIC_IB_E_SDMAERRS)
1036 qib_decode_7220_sdma_errs(dd->pport, err, buf, blen);
1037 if (err & ERR_MASK(InvalidEEPCmd))
1038 strlcat(buf, "invalideepromcmd ", blen);
1039 done:
1040 return iserr;
1041 }
1042
1043 static void reenable_7220_chase(unsigned long opaque)
1044 {
1045 struct qib_pportdata *ppd = (struct qib_pportdata *)opaque;
1046 ppd->cpspec->chase_timer.expires = 0;
1047 qib_set_ib_7220_lstate(ppd, QLOGIC_IB_IBCC_LINKCMD_DOWN,
1048 QLOGIC_IB_IBCC_LINKINITCMD_POLL);
1049 }
1050
1051 static void handle_7220_chase(struct qib_pportdata *ppd, u64 ibcst)
1052 {
1053 u8 ibclt;
1054 u64 tnow;
1055
1056 ibclt = (u8)SYM_FIELD(ibcst, IBCStatus, LinkTrainingState);
1057
1058 /*
1059 * Detect and handle the state chase issue, where we can
1060 * get stuck if we are unlucky on timing on both sides of
1061 * the link. If we are, we disable, set a timer, and
1062 * then re-enable.
1063 */
1064 switch (ibclt) {
1065 case IB_7220_LT_STATE_CFGRCVFCFG:
1066 case IB_7220_LT_STATE_CFGWAITRMT:
1067 case IB_7220_LT_STATE_TXREVLANES:
1068 case IB_7220_LT_STATE_CFGENH:
1069 tnow = get_jiffies_64();
1070 if (ppd->cpspec->chase_end &&
1071 time_after64(tnow, ppd->cpspec->chase_end)) {
1072 ppd->cpspec->chase_end = 0;
1073 qib_set_ib_7220_lstate(ppd,
1074 QLOGIC_IB_IBCC_LINKCMD_DOWN,
1075 QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
1076 ppd->cpspec->chase_timer.expires = jiffies +
1077 QIB_CHASE_DIS_TIME;
1078 add_timer(&ppd->cpspec->chase_timer);
1079 } else if (!ppd->cpspec->chase_end)
1080 ppd->cpspec->chase_end = tnow + QIB_CHASE_TIME;
1081 break;
1082
1083 default:
1084 ppd->cpspec->chase_end = 0;
1085 break;
1086 }
1087 }
1088
1089 static void handle_7220_errors(struct qib_devdata *dd, u64 errs)
1090 {
1091 char *msg;
1092 u64 ignore_this_time = 0;
1093 u64 iserr = 0;
1094 int log_idx;
1095 struct qib_pportdata *ppd = dd->pport;
1096 u64 mask;
1097
1098 /* don't report errors that are masked */
1099 errs &= dd->cspec->errormask;
1100 msg = dd->cspec->emsgbuf;
1101
1102 /* do these first, they are most important */
1103 if (errs & ERR_MASK(HardwareErr))
1104 qib_7220_handle_hwerrors(dd, msg, sizeof dd->cspec->emsgbuf);
1105 else
1106 for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
1107 if (errs & dd->eep_st_masks[log_idx].errs_to_log)
1108 qib_inc_eeprom_err(dd, log_idx, 1);
1109
1110 if (errs & QLOGIC_IB_E_SDMAERRS)
1111 sdma_7220_errors(ppd, errs);
1112
1113 if (errs & ~IB_E_BITSEXTANT)
1114 qib_dev_err(dd, "error interrupt with unknown errors "
1115 "%llx set\n", (unsigned long long)
1116 (errs & ~IB_E_BITSEXTANT));
1117
1118 if (errs & E_SUM_ERRS) {
1119 qib_disarm_7220_senderrbufs(ppd);
1120 if ((errs & E_SUM_LINK_PKTERRS) &&
1121 !(ppd->lflags & QIBL_LINKACTIVE)) {
1122 /*
1123 * This can happen when trying to bring the link
1124 * up, but the IB link changes state at the "wrong"
1125 * time. The IB logic then complains that the packet
1126 * isn't valid. We don't want to confuse people, so
1127 * we just don't print them, except at debug
1128 */
1129 ignore_this_time = errs & E_SUM_LINK_PKTERRS;
1130 }
1131 } else if ((errs & E_SUM_LINK_PKTERRS) &&
1132 !(ppd->lflags & QIBL_LINKACTIVE)) {
1133 /*
1134 * This can happen when SMA is trying to bring the link
1135 * up, but the IB link changes state at the "wrong" time.
1136 * The IB logic then complains that the packet isn't
1137 * valid. We don't want to confuse people, so we just
1138 * don't print them, except at debug
1139 */
1140 ignore_this_time = errs & E_SUM_LINK_PKTERRS;
1141 }
1142
1143 qib_write_kreg(dd, kr_errclear, errs);
1144
1145 errs &= ~ignore_this_time;
1146 if (!errs)
1147 goto done;
1148
1149 /*
1150 * The ones we mask off are handled specially below
1151 * or above. Also mask SDMADISABLED by default as it
1152 * is too chatty.
1153 */
1154 mask = ERR_MASK(IBStatusChanged) |
1155 ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr) |
1156 ERR_MASK(HardwareErr) | ERR_MASK(SDmaDisabledErr);
1157
1158 qib_decode_7220_err(dd, msg, sizeof dd->cspec->emsgbuf, errs & ~mask);
1159
1160 if (errs & E_SUM_PKTERRS)
1161 qib_stats.sps_rcverrs++;
1162 if (errs & E_SUM_ERRS)
1163 qib_stats.sps_txerrs++;
1164 iserr = errs & ~(E_SUM_PKTERRS | QLOGIC_IB_E_PKTERRS |
1165 ERR_MASK(SDmaDisabledErr));
1166
1167 if (errs & ERR_MASK(IBStatusChanged)) {
1168 u64 ibcs;
1169
1170 ibcs = qib_read_kreg64(dd, kr_ibcstatus);
1171 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
1172 handle_7220_chase(ppd, ibcs);
1173
1174 /* Update our picture of width and speed from chip */
1175 ppd->link_width_active =
1176 ((ibcs >> IBA7220_LINKWIDTH_SHIFT) & 1) ?
1177 IB_WIDTH_4X : IB_WIDTH_1X;
1178 ppd->link_speed_active =
1179 ((ibcs >> IBA7220_LINKSPEED_SHIFT) & 1) ?
1180 QIB_IB_DDR : QIB_IB_SDR;
1181
1182 /*
1183 * Since going into a recovery state causes the link state
1184 * to go down and since recovery is transitory, it is better
1185 * if we "miss" ever seeing the link training state go into
1186 * recovery (i.e., ignore this transition for link state
1187 * special handling purposes) without updating lastibcstat.
1188 */
1189 if (qib_7220_phys_portstate(ibcs) !=
1190 IB_PHYSPORTSTATE_LINK_ERR_RECOVER)
1191 qib_handle_e_ibstatuschanged(ppd, ibcs);
1192 }
1193
1194 if (errs & ERR_MASK(ResetNegated)) {
1195 qib_dev_err(dd, "Got reset, requires re-init "
1196 "(unload and reload driver)\n");
1197 dd->flags &= ~QIB_INITTED; /* needs re-init */
1198 /* mark as having had error */
1199 *dd->devstatusp |= QIB_STATUS_HWERROR;
1200 *dd->pport->statusp &= ~QIB_STATUS_IB_CONF;
1201 }
1202
1203 if (*msg && iserr)
1204 qib_dev_porterr(dd, ppd->port, "%s error\n", msg);
1205
1206 if (ppd->state_wanted & ppd->lflags)
1207 wake_up_interruptible(&ppd->state_wait);
1208
1209 /*
1210 * If there were hdrq or egrfull errors, wake up any processes
1211 * waiting in poll. We used to try to check which contexts had
1212 * the overflow, but given the cost of that and the chip reads
1213 * to support it, it's better to just wake everybody up if we
1214 * get an overflow; waiters can poll again if it's not them.
1215 */
1216 if (errs & (ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr))) {
1217 qib_handle_urcv(dd, ~0U);
1218 if (errs & ERR_MASK(RcvEgrFullErr))
1219 qib_stats.sps_buffull++;
1220 else
1221 qib_stats.sps_hdrfull++;
1222 }
1223 done:
1224 return;
1225 }
1226
1227 /* enable/disable chip from delivering interrupts */
1228 static void qib_7220_set_intr_state(struct qib_devdata *dd, u32 enable)
1229 {
1230 if (enable) {
1231 if (dd->flags & QIB_BADINTR)
1232 return;
1233 qib_write_kreg(dd, kr_intmask, ~0ULL);
1234 /* force re-interrupt of any pending interrupts. */
1235 qib_write_kreg(dd, kr_intclear, 0ULL);
1236 } else
1237 qib_write_kreg(dd, kr_intmask, 0ULL);
1238 }
1239
1240 /*
1241 * Try to cleanup as much as possible for anything that might have gone
1242 * wrong while in freeze mode, such as pio buffers being written by user
1243 * processes (causing armlaunch), send errors due to going into freeze mode,
1244 * etc., and try to avoid causing extra interrupts while doing so.
1245 * Forcibly update the in-memory pioavail register copies after cleanup
1246 * because the chip won't do it while in freeze mode (the register values
1247 * themselves are kept correct).
1248 * Make sure that we don't lose any important interrupts by using the chip
1249 * feature that says that writing 0 to a bit in *clear that is set in
1250 * *status will cause an interrupt to be generated again (if allowed by
1251 * the *mask value).
1252 * This is in chip-specific code because of all of the register accesses,
1253 * even though the details are similar on most chips.
1254 */
1255 static void qib_7220_clear_freeze(struct qib_devdata *dd)
1256 {
1257 /* disable error interrupts, to avoid confusion */
1258 qib_write_kreg(dd, kr_errmask, 0ULL);
1259
1260 /* also disable interrupts; errormask is sometimes overwriten */
1261 qib_7220_set_intr_state(dd, 0);
1262
1263 qib_cancel_sends(dd->pport);
1264
1265 /* clear the freeze, and be sure chip saw it */
1266 qib_write_kreg(dd, kr_control, dd->control);
1267 qib_read_kreg32(dd, kr_scratch);
1268
1269 /* force in-memory update now we are out of freeze */
1270 qib_force_pio_avail_update(dd);
1271
1272 /*
1273 * force new interrupt if any hwerr, error or interrupt bits are
1274 * still set, and clear "safe" send packet errors related to freeze
1275 * and cancelling sends. Re-enable error interrupts before possible
1276 * force of re-interrupt on pending interrupts.
1277 */
1278 qib_write_kreg(dd, kr_hwerrclear, 0ULL);
1279 qib_write_kreg(dd, kr_errclear, E_SPKT_ERRS_IGNORE);
1280 qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
1281 qib_7220_set_intr_state(dd, 1);
1282 }
1283
1284 /**
1285 * qib_7220_handle_hwerrors - display hardware errors.
1286 * @dd: the qlogic_ib device
1287 * @msg: the output buffer
1288 * @msgl: the size of the output buffer
1289 *
1290 * Use same msg buffer as regular errors to avoid excessive stack
1291 * use. Most hardware errors are catastrophic, but for right now,
1292 * we'll print them and continue. We reuse the same message buffer as
1293 * handle_7220_errors() to avoid excessive stack usage.
1294 */
1295 static void qib_7220_handle_hwerrors(struct qib_devdata *dd, char *msg,
1296 size_t msgl)
1297 {
1298 u64 hwerrs;
1299 u32 bits, ctrl;
1300 int isfatal = 0;
1301 char *bitsmsg;
1302 int log_idx;
1303
1304 hwerrs = qib_read_kreg64(dd, kr_hwerrstatus);
1305 if (!hwerrs)
1306 goto bail;
1307 if (hwerrs == ~0ULL) {
1308 qib_dev_err(dd, "Read of hardware error status failed "
1309 "(all bits set); ignoring\n");
1310 goto bail;
1311 }
1312 qib_stats.sps_hwerrs++;
1313
1314 /*
1315 * Always clear the error status register, except MEMBISTFAIL,
1316 * regardless of whether we continue or stop using the chip.
1317 * We want that set so we know it failed, even across driver reload.
1318 * We'll still ignore it in the hwerrmask. We do this partly for
1319 * diagnostics, but also for support.
1320 */
1321 qib_write_kreg(dd, kr_hwerrclear,
1322 hwerrs & ~HWE_MASK(PowerOnBISTFailed));
1323
1324 hwerrs &= dd->cspec->hwerrmask;
1325
1326 /* We log some errors to EEPROM, check if we have any of those. */
1327 for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
1328 if (hwerrs & dd->eep_st_masks[log_idx].hwerrs_to_log)
1329 qib_inc_eeprom_err(dd, log_idx, 1);
1330 if (hwerrs & ~(TXEMEMPARITYERR_PIOBUF | TXEMEMPARITYERR_PIOPBC |
1331 RXE_PARITY))
1332 qib_devinfo(dd->pcidev, "Hardware error: hwerr=0x%llx "
1333 "(cleared)\n", (unsigned long long) hwerrs);
1334
1335 if (hwerrs & ~IB_HWE_BITSEXTANT)
1336 qib_dev_err(dd, "hwerror interrupt with unknown errors "
1337 "%llx set\n", (unsigned long long)
1338 (hwerrs & ~IB_HWE_BITSEXTANT));
1339
1340 if (hwerrs & QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR)
1341 qib_sd7220_clr_ibpar(dd);
1342
1343 ctrl = qib_read_kreg32(dd, kr_control);
1344 if ((ctrl & QLOGIC_IB_C_FREEZEMODE) && !dd->diag_client) {
1345 /*
1346 * Parity errors in send memory are recoverable by h/w
1347 * just do housekeeping, exit freeze mode and continue.
1348 */
1349 if (hwerrs & (TXEMEMPARITYERR_PIOBUF |
1350 TXEMEMPARITYERR_PIOPBC)) {
1351 qib_7220_txe_recover(dd);
1352 hwerrs &= ~(TXEMEMPARITYERR_PIOBUF |
1353 TXEMEMPARITYERR_PIOPBC);
1354 }
1355 if (hwerrs)
1356 isfatal = 1;
1357 else
1358 qib_7220_clear_freeze(dd);
1359 }
1360
1361 *msg = '\0';
1362
1363 if (hwerrs & HWE_MASK(PowerOnBISTFailed)) {
1364 isfatal = 1;
1365 strlcat(msg, "[Memory BIST test failed, "
1366 "InfiniPath hardware unusable]", msgl);
1367 /* ignore from now on, so disable until driver reloaded */
1368 dd->cspec->hwerrmask &= ~HWE_MASK(PowerOnBISTFailed);
1369 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1370 }
1371
1372 qib_format_hwerrors(hwerrs, qib_7220_hwerror_msgs,
1373 ARRAY_SIZE(qib_7220_hwerror_msgs), msg, msgl);
1374
1375 bitsmsg = dd->cspec->bitsmsgbuf;
1376 if (hwerrs & (QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK <<
1377 QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT)) {
1378 bits = (u32) ((hwerrs >>
1379 QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT) &
1380 QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK);
1381 snprintf(bitsmsg, sizeof dd->cspec->bitsmsgbuf,
1382 "[PCIe Mem Parity Errs %x] ", bits);
1383 strlcat(msg, bitsmsg, msgl);
1384 }
1385
1386 #define _QIB_PLL_FAIL (QLOGIC_IB_HWE_COREPLL_FBSLIP | \
1387 QLOGIC_IB_HWE_COREPLL_RFSLIP)
1388
1389 if (hwerrs & _QIB_PLL_FAIL) {
1390 isfatal = 1;
1391 snprintf(bitsmsg, sizeof dd->cspec->bitsmsgbuf,
1392 "[PLL failed (%llx), InfiniPath hardware unusable]",
1393 (unsigned long long) hwerrs & _QIB_PLL_FAIL);
1394 strlcat(msg, bitsmsg, msgl);
1395 /* ignore from now on, so disable until driver reloaded */
1396 dd->cspec->hwerrmask &= ~(hwerrs & _QIB_PLL_FAIL);
1397 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1398 }
1399
1400 if (hwerrs & QLOGIC_IB_HWE_SERDESPLLFAILED) {
1401 /*
1402 * If it occurs, it is left masked since the eternal
1403 * interface is unused.
1404 */
1405 dd->cspec->hwerrmask &= ~QLOGIC_IB_HWE_SERDESPLLFAILED;
1406 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1407 }
1408
1409 qib_dev_err(dd, "%s hardware error\n", msg);
1410
1411 if (isfatal && !dd->diag_client) {
1412 qib_dev_err(dd, "Fatal Hardware Error, no longer"
1413 " usable, SN %.16s\n", dd->serial);
1414 /*
1415 * For /sys status file and user programs to print; if no
1416 * trailing brace is copied, we'll know it was truncated.
1417 */
1418 if (dd->freezemsg)
1419 snprintf(dd->freezemsg, dd->freezelen,
1420 "{%s}", msg);
1421 qib_disable_after_error(dd);
1422 }
1423 bail:;
1424 }
1425
1426 /**
1427 * qib_7220_init_hwerrors - enable hardware errors
1428 * @dd: the qlogic_ib device
1429 *
1430 * now that we have finished initializing everything that might reasonably
1431 * cause a hardware error, and cleared those errors bits as they occur,
1432 * we can enable hardware errors in the mask (potentially enabling
1433 * freeze mode), and enable hardware errors as errors (along with
1434 * everything else) in errormask
1435 */
1436 static void qib_7220_init_hwerrors(struct qib_devdata *dd)
1437 {
1438 u64 val;
1439 u64 extsval;
1440
1441 extsval = qib_read_kreg64(dd, kr_extstatus);
1442
1443 if (!(extsval & (QLOGIC_IB_EXTS_MEMBIST_ENDTEST |
1444 QLOGIC_IB_EXTS_MEMBIST_DISABLED)))
1445 qib_dev_err(dd, "MemBIST did not complete!\n");
1446 if (extsval & QLOGIC_IB_EXTS_MEMBIST_DISABLED)
1447 qib_devinfo(dd->pcidev, "MemBIST is disabled.\n");
1448
1449 val = ~0ULL; /* default to all hwerrors become interrupts, */
1450
1451 val &= ~QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR;
1452 dd->cspec->hwerrmask = val;
1453
1454 qib_write_kreg(dd, kr_hwerrclear, ~HWE_MASK(PowerOnBISTFailed));
1455 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1456
1457 /* clear all */
1458 qib_write_kreg(dd, kr_errclear, ~0ULL);
1459 /* enable errors that are masked, at least this first time. */
1460 qib_write_kreg(dd, kr_errmask, ~0ULL);
1461 dd->cspec->errormask = qib_read_kreg64(dd, kr_errmask);
1462 /* clear any interrupts up to this point (ints still not enabled) */
1463 qib_write_kreg(dd, kr_intclear, ~0ULL);
1464 }
1465
1466 /*
1467 * Disable and enable the armlaunch error. Used for PIO bandwidth testing
1468 * on chips that are count-based, rather than trigger-based. There is no
1469 * reference counting, but that's also fine, given the intended use.
1470 * Only chip-specific because it's all register accesses
1471 */
1472 static void qib_set_7220_armlaunch(struct qib_devdata *dd, u32 enable)
1473 {
1474 if (enable) {
1475 qib_write_kreg(dd, kr_errclear, ERR_MASK(SendPioArmLaunchErr));
1476 dd->cspec->errormask |= ERR_MASK(SendPioArmLaunchErr);
1477 } else
1478 dd->cspec->errormask &= ~ERR_MASK(SendPioArmLaunchErr);
1479 qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
1480 }
1481
1482 /*
1483 * Formerly took parameter <which> in pre-shifted,
1484 * pre-merged form with LinkCmd and LinkInitCmd
1485 * together, and assuming the zero was NOP.
1486 */
1487 static void qib_set_ib_7220_lstate(struct qib_pportdata *ppd, u16 linkcmd,
1488 u16 linitcmd)
1489 {
1490 u64 mod_wd;
1491 struct qib_devdata *dd = ppd->dd;
1492 unsigned long flags;
1493
1494 if (linitcmd == QLOGIC_IB_IBCC_LINKINITCMD_DISABLE) {
1495 /*
1496 * If we are told to disable, note that so link-recovery
1497 * code does not attempt to bring us back up.
1498 */
1499 spin_lock_irqsave(&ppd->lflags_lock, flags);
1500 ppd->lflags |= QIBL_IB_LINK_DISABLED;
1501 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1502 } else if (linitcmd || linkcmd == QLOGIC_IB_IBCC_LINKCMD_DOWN) {
1503 /*
1504 * Any other linkinitcmd will lead to LINKDOWN and then
1505 * to INIT (if all is well), so clear flag to let
1506 * link-recovery code attempt to bring us back up.
1507 */
1508 spin_lock_irqsave(&ppd->lflags_lock, flags);
1509 ppd->lflags &= ~QIBL_IB_LINK_DISABLED;
1510 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1511 }
1512
1513 mod_wd = (linkcmd << IBA7220_IBCC_LINKCMD_SHIFT) |
1514 (linitcmd << QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
1515
1516 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl | mod_wd);
1517 /* write to chip to prevent back-to-back writes of ibc reg */
1518 qib_write_kreg(dd, kr_scratch, 0);
1519 }
1520
1521 /*
1522 * All detailed interaction with the SerDes has been moved to qib_sd7220.c
1523 *
1524 * The portion of IBA7220-specific bringup_serdes() that actually deals with
1525 * registers and memory within the SerDes itself is qib_sd7220_init().
1526 */
1527
1528 /**
1529 * qib_7220_bringup_serdes - bring up the serdes
1530 * @ppd: physical port on the qlogic_ib device
1531 */
1532 static int qib_7220_bringup_serdes(struct qib_pportdata *ppd)
1533 {
1534 struct qib_devdata *dd = ppd->dd;
1535 u64 val, prev_val, guid, ibc;
1536 int ret = 0;
1537
1538 /* Put IBC in reset, sends disabled */
1539 dd->control &= ~QLOGIC_IB_C_LINKENABLE;
1540 qib_write_kreg(dd, kr_control, 0ULL);
1541
1542 if (qib_compat_ddr_negotiate) {
1543 ppd->cpspec->ibdeltainprog = 1;
1544 ppd->cpspec->ibsymsnap = read_7220_creg32(dd, cr_ibsymbolerr);
1545 ppd->cpspec->iblnkerrsnap =
1546 read_7220_creg32(dd, cr_iblinkerrrecov);
1547 }
1548
1549 /* flowcontrolwatermark is in units of KBytes */
1550 ibc = 0x5ULL << SYM_LSB(IBCCtrl, FlowCtrlWaterMark);
1551 /*
1552 * How often flowctrl sent. More or less in usecs; balance against
1553 * watermark value, so that in theory senders always get a flow
1554 * control update in time to not let the IB link go idle.
1555 */
1556 ibc |= 0x3ULL << SYM_LSB(IBCCtrl, FlowCtrlPeriod);
1557 /* max error tolerance */
1558 ibc |= 0xfULL << SYM_LSB(IBCCtrl, PhyerrThreshold);
1559 /* use "real" buffer space for */
1560 ibc |= 4ULL << SYM_LSB(IBCCtrl, CreditScale);
1561 /* IB credit flow control. */
1562 ibc |= 0xfULL << SYM_LSB(IBCCtrl, OverrunThreshold);
1563 /*
1564 * set initial max size pkt IBC will send, including ICRC; it's the
1565 * PIO buffer size in dwords, less 1; also see qib_set_mtu()
1566 */
1567 ibc |= ((u64)(ppd->ibmaxlen >> 2) + 1) << SYM_LSB(IBCCtrl, MaxPktLen);
1568 ppd->cpspec->ibcctrl = ibc; /* without linkcmd or linkinitcmd! */
1569
1570 /* initially come up waiting for TS1, without sending anything. */
1571 val = ppd->cpspec->ibcctrl | (QLOGIC_IB_IBCC_LINKINITCMD_DISABLE <<
1572 QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
1573 qib_write_kreg(dd, kr_ibcctrl, val);
1574
1575 if (!ppd->cpspec->ibcddrctrl) {
1576 /* not on re-init after reset */
1577 ppd->cpspec->ibcddrctrl = qib_read_kreg64(dd, kr_ibcddrctrl);
1578
1579 if (ppd->link_speed_enabled == (QIB_IB_SDR | QIB_IB_DDR))
1580 ppd->cpspec->ibcddrctrl |=
1581 IBA7220_IBC_SPEED_AUTONEG_MASK |
1582 IBA7220_IBC_IBTA_1_2_MASK;
1583 else
1584 ppd->cpspec->ibcddrctrl |=
1585 ppd->link_speed_enabled == QIB_IB_DDR ?
1586 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
1587 if ((ppd->link_width_enabled & (IB_WIDTH_1X | IB_WIDTH_4X)) ==
1588 (IB_WIDTH_1X | IB_WIDTH_4X))
1589 ppd->cpspec->ibcddrctrl |= IBA7220_IBC_WIDTH_AUTONEG;
1590 else
1591 ppd->cpspec->ibcddrctrl |=
1592 ppd->link_width_enabled == IB_WIDTH_4X ?
1593 IBA7220_IBC_WIDTH_4X_ONLY :
1594 IBA7220_IBC_WIDTH_1X_ONLY;
1595
1596 /* always enable these on driver reload, not sticky */
1597 ppd->cpspec->ibcddrctrl |=
1598 IBA7220_IBC_RXPOL_MASK << IBA7220_IBC_RXPOL_SHIFT;
1599 ppd->cpspec->ibcddrctrl |=
1600 IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
1601
1602 /* enable automatic lane reversal detection for receive */
1603 ppd->cpspec->ibcddrctrl |= IBA7220_IBC_LANE_REV_SUPPORTED;
1604 } else
1605 /* write to chip to prevent back-to-back writes of ibc reg */
1606 qib_write_kreg(dd, kr_scratch, 0);
1607
1608 qib_write_kreg(dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
1609 qib_write_kreg(dd, kr_scratch, 0);
1610
1611 qib_write_kreg(dd, kr_ncmodectrl, 0Ull);
1612 qib_write_kreg(dd, kr_scratch, 0);
1613
1614 ret = qib_sd7220_init(dd);
1615
1616 val = qib_read_kreg64(dd, kr_xgxs_cfg);
1617 prev_val = val;
1618 val |= QLOGIC_IB_XGXS_FC_SAFE;
1619 if (val != prev_val) {
1620 qib_write_kreg(dd, kr_xgxs_cfg, val);
1621 qib_read_kreg32(dd, kr_scratch);
1622 }
1623 if (val & QLOGIC_IB_XGXS_RESET)
1624 val &= ~QLOGIC_IB_XGXS_RESET;
1625 if (val != prev_val)
1626 qib_write_kreg(dd, kr_xgxs_cfg, val);
1627
1628 /* first time through, set port guid */
1629 if (!ppd->guid)
1630 ppd->guid = dd->base_guid;
1631 guid = be64_to_cpu(ppd->guid);
1632
1633 qib_write_kreg(dd, kr_hrtbt_guid, guid);
1634 if (!ret) {
1635 dd->control |= QLOGIC_IB_C_LINKENABLE;
1636 qib_write_kreg(dd, kr_control, dd->control);
1637 } else
1638 /* write to chip to prevent back-to-back writes of ibc reg */
1639 qib_write_kreg(dd, kr_scratch, 0);
1640 return ret;
1641 }
1642
1643 /**
1644 * qib_7220_quiet_serdes - set serdes to txidle
1645 * @ppd: physical port of the qlogic_ib device
1646 * Called when driver is being unloaded
1647 */
1648 static void qib_7220_quiet_serdes(struct qib_pportdata *ppd)
1649 {
1650 u64 val;
1651 struct qib_devdata *dd = ppd->dd;
1652 unsigned long flags;
1653
1654 /* disable IBC */
1655 dd->control &= ~QLOGIC_IB_C_LINKENABLE;
1656 qib_write_kreg(dd, kr_control,
1657 dd->control | QLOGIC_IB_C_FREEZEMODE);
1658
1659 ppd->cpspec->chase_end = 0;
1660 if (ppd->cpspec->chase_timer.data) /* if initted */
1661 del_timer_sync(&ppd->cpspec->chase_timer);
1662
1663 if (ppd->cpspec->ibsymdelta || ppd->cpspec->iblnkerrdelta ||
1664 ppd->cpspec->ibdeltainprog) {
1665 u64 diagc;
1666
1667 /* enable counter writes */
1668 diagc = qib_read_kreg64(dd, kr_hwdiagctrl);
1669 qib_write_kreg(dd, kr_hwdiagctrl,
1670 diagc | SYM_MASK(HwDiagCtrl, CounterWrEnable));
1671
1672 if (ppd->cpspec->ibsymdelta || ppd->cpspec->ibdeltainprog) {
1673 val = read_7220_creg32(dd, cr_ibsymbolerr);
1674 if (ppd->cpspec->ibdeltainprog)
1675 val -= val - ppd->cpspec->ibsymsnap;
1676 val -= ppd->cpspec->ibsymdelta;
1677 write_7220_creg(dd, cr_ibsymbolerr, val);
1678 }
1679 if (ppd->cpspec->iblnkerrdelta || ppd->cpspec->ibdeltainprog) {
1680 val = read_7220_creg32(dd, cr_iblinkerrrecov);
1681 if (ppd->cpspec->ibdeltainprog)
1682 val -= val - ppd->cpspec->iblnkerrsnap;
1683 val -= ppd->cpspec->iblnkerrdelta;
1684 write_7220_creg(dd, cr_iblinkerrrecov, val);
1685 }
1686
1687 /* and disable counter writes */
1688 qib_write_kreg(dd, kr_hwdiagctrl, diagc);
1689 }
1690 qib_set_ib_7220_lstate(ppd, 0, QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
1691
1692 spin_lock_irqsave(&ppd->lflags_lock, flags);
1693 ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
1694 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1695 wake_up(&ppd->cpspec->autoneg_wait);
1696 cancel_delayed_work_sync(&ppd->cpspec->autoneg_work);
1697
1698 shutdown_7220_relock_poll(ppd->dd);
1699 val = qib_read_kreg64(ppd->dd, kr_xgxs_cfg);
1700 val |= QLOGIC_IB_XGXS_RESET;
1701 qib_write_kreg(ppd->dd, kr_xgxs_cfg, val);
1702 }
1703
1704 /**
1705 * qib_setup_7220_setextled - set the state of the two external LEDs
1706 * @dd: the qlogic_ib device
1707 * @on: whether the link is up or not
1708 *
1709 * The exact combo of LEDs if on is true is determined by looking
1710 * at the ibcstatus.
1711 *
1712 * These LEDs indicate the physical and logical state of IB link.
1713 * For this chip (at least with recommended board pinouts), LED1
1714 * is Yellow (logical state) and LED2 is Green (physical state),
1715 *
1716 * Note: We try to match the Mellanox HCA LED behavior as best
1717 * we can. Green indicates physical link state is OK (something is
1718 * plugged in, and we can train).
1719 * Amber indicates the link is logically up (ACTIVE).
1720 * Mellanox further blinks the amber LED to indicate data packet
1721 * activity, but we have no hardware support for that, so it would
1722 * require waking up every 10-20 msecs and checking the counters
1723 * on the chip, and then turning the LED off if appropriate. That's
1724 * visible overhead, so not something we will do.
1725 *
1726 */
1727 static void qib_setup_7220_setextled(struct qib_pportdata *ppd, u32 on)
1728 {
1729 struct qib_devdata *dd = ppd->dd;
1730 u64 extctl, ledblink = 0, val, lst, ltst;
1731 unsigned long flags;
1732
1733 /*
1734 * The diags use the LED to indicate diag info, so we leave
1735 * the external LED alone when the diags are running.
1736 */
1737 if (dd->diag_client)
1738 return;
1739
1740 if (ppd->led_override) {
1741 ltst = (ppd->led_override & QIB_LED_PHYS) ?
1742 IB_PHYSPORTSTATE_LINKUP : IB_PHYSPORTSTATE_DISABLED,
1743 lst = (ppd->led_override & QIB_LED_LOG) ?
1744 IB_PORT_ACTIVE : IB_PORT_DOWN;
1745 } else if (on) {
1746 val = qib_read_kreg64(dd, kr_ibcstatus);
1747 ltst = qib_7220_phys_portstate(val);
1748 lst = qib_7220_iblink_state(val);
1749 } else {
1750 ltst = 0;
1751 lst = 0;
1752 }
1753
1754 spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
1755 extctl = dd->cspec->extctrl & ~(SYM_MASK(EXTCtrl, LEDPriPortGreenOn) |
1756 SYM_MASK(EXTCtrl, LEDPriPortYellowOn));
1757 if (ltst == IB_PHYSPORTSTATE_LINKUP) {
1758 extctl |= SYM_MASK(EXTCtrl, LEDPriPortGreenOn);
1759 /*
1760 * counts are in chip clock (4ns) periods.
1761 * This is 1/16 sec (66.6ms) on,
1762 * 3/16 sec (187.5 ms) off, with packets rcvd
1763 */
1764 ledblink = ((66600 * 1000UL / 4) << IBA7220_LEDBLINK_ON_SHIFT)
1765 | ((187500 * 1000UL / 4) << IBA7220_LEDBLINK_OFF_SHIFT);
1766 }
1767 if (lst == IB_PORT_ACTIVE)
1768 extctl |= SYM_MASK(EXTCtrl, LEDPriPortYellowOn);
1769 dd->cspec->extctrl = extctl;
1770 qib_write_kreg(dd, kr_extctrl, extctl);
1771 spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
1772
1773 if (ledblink) /* blink the LED on packet receive */
1774 qib_write_kreg(dd, kr_rcvpktledcnt, ledblink);
1775 }
1776
1777 static void qib_7220_free_irq(struct qib_devdata *dd)
1778 {
1779 if (dd->cspec->irq) {
1780 free_irq(dd->cspec->irq, dd);
1781 dd->cspec->irq = 0;
1782 }
1783 qib_nomsi(dd);
1784 }
1785
1786 /*
1787 * qib_setup_7220_cleanup - clean up any per-chip chip-specific stuff
1788 * @dd: the qlogic_ib device
1789 *
1790 * This is called during driver unload.
1791 *
1792 */
1793 static void qib_setup_7220_cleanup(struct qib_devdata *dd)
1794 {
1795 qib_7220_free_irq(dd);
1796 kfree(dd->cspec->cntrs);
1797 kfree(dd->cspec->portcntrs);
1798 }
1799
1800 /*
1801 * This is only called for SDmaInt.
1802 * SDmaDisabled is handled on the error path.
1803 */
1804 static void sdma_7220_intr(struct qib_pportdata *ppd, u64 istat)
1805 {
1806 unsigned long flags;
1807
1808 spin_lock_irqsave(&ppd->sdma_lock, flags);
1809
1810 switch (ppd->sdma_state.current_state) {
1811 case qib_sdma_state_s00_hw_down:
1812 break;
1813
1814 case qib_sdma_state_s10_hw_start_up_wait:
1815 __qib_sdma_process_event(ppd, qib_sdma_event_e20_hw_started);
1816 break;
1817
1818 case qib_sdma_state_s20_idle:
1819 break;
1820
1821 case qib_sdma_state_s30_sw_clean_up_wait:
1822 break;
1823
1824 case qib_sdma_state_s40_hw_clean_up_wait:
1825 break;
1826
1827 case qib_sdma_state_s50_hw_halt_wait:
1828 __qib_sdma_process_event(ppd, qib_sdma_event_e60_hw_halted);
1829 break;
1830
1831 case qib_sdma_state_s99_running:
1832 /* too chatty to print here */
1833 __qib_sdma_intr(ppd);
1834 break;
1835 }
1836 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
1837 }
1838
1839 static void qib_wantpiobuf_7220_intr(struct qib_devdata *dd, u32 needint)
1840 {
1841 unsigned long flags;
1842
1843 spin_lock_irqsave(&dd->sendctrl_lock, flags);
1844 if (needint) {
1845 if (!(dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
1846 goto done;
1847 /*
1848 * blip the availupd off, next write will be on, so
1849 * we ensure an avail update, regardless of threshold or
1850 * buffers becoming free, whenever we want an interrupt
1851 */
1852 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl &
1853 ~SYM_MASK(SendCtrl, SendBufAvailUpd));
1854 qib_write_kreg(dd, kr_scratch, 0ULL);
1855 dd->sendctrl |= SYM_MASK(SendCtrl, SendIntBufAvail);
1856 } else
1857 dd->sendctrl &= ~SYM_MASK(SendCtrl, SendIntBufAvail);
1858 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
1859 qib_write_kreg(dd, kr_scratch, 0ULL);
1860 done:
1861 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
1862 }
1863
1864 /*
1865 * Handle errors and unusual events first, separate function
1866 * to improve cache hits for fast path interrupt handling.
1867 */
1868 static noinline void unlikely_7220_intr(struct qib_devdata *dd, u64 istat)
1869 {
1870 if (unlikely(istat & ~QLOGIC_IB_I_BITSEXTANT))
1871 qib_dev_err(dd,
1872 "interrupt with unknown interrupts %Lx set\n",
1873 istat & ~QLOGIC_IB_I_BITSEXTANT);
1874
1875 if (istat & QLOGIC_IB_I_GPIO) {
1876 u32 gpiostatus;
1877
1878 /*
1879 * Boards for this chip currently don't use GPIO interrupts,
1880 * so clear by writing GPIOstatus to GPIOclear, and complain
1881 * to alert developer. To avoid endless repeats, clear
1882 * the bits in the mask, since there is some kind of
1883 * programming error or chip problem.
1884 */
1885 gpiostatus = qib_read_kreg32(dd, kr_gpio_status);
1886 /*
1887 * In theory, writing GPIOstatus to GPIOclear could
1888 * have a bad side-effect on some diagnostic that wanted
1889 * to poll for a status-change, but the various shadows
1890 * make that problematic at best. Diags will just suppress
1891 * all GPIO interrupts during such tests.
1892 */
1893 qib_write_kreg(dd, kr_gpio_clear, gpiostatus);
1894
1895 if (gpiostatus) {
1896 const u32 mask = qib_read_kreg32(dd, kr_gpio_mask);
1897 u32 gpio_irq = mask & gpiostatus;
1898
1899 /*
1900 * A bit set in status and (chip) Mask register
1901 * would cause an interrupt. Since we are not
1902 * expecting any, report it. Also check that the
1903 * chip reflects our shadow, report issues,
1904 * and refresh from the shadow.
1905 */
1906 /*
1907 * Clear any troublemakers, and update chip
1908 * from shadow
1909 */
1910 dd->cspec->gpio_mask &= ~gpio_irq;
1911 qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
1912 }
1913 }
1914
1915 if (istat & QLOGIC_IB_I_ERROR) {
1916 u64 estat;
1917
1918 qib_stats.sps_errints++;
1919 estat = qib_read_kreg64(dd, kr_errstatus);
1920 if (!estat)
1921 qib_devinfo(dd->pcidev, "error interrupt (%Lx), "
1922 "but no error bits set!\n", istat);
1923 else
1924 handle_7220_errors(dd, estat);
1925 }
1926 }
1927
1928 static irqreturn_t qib_7220intr(int irq, void *data)
1929 {
1930 struct qib_devdata *dd = data;
1931 irqreturn_t ret;
1932 u64 istat;
1933 u64 ctxtrbits;
1934 u64 rmask;
1935 unsigned i;
1936
1937 if ((dd->flags & (QIB_PRESENT | QIB_BADINTR)) != QIB_PRESENT) {
1938 /*
1939 * This return value is not great, but we do not want the
1940 * interrupt core code to remove our interrupt handler
1941 * because we don't appear to be handling an interrupt
1942 * during a chip reset.
1943 */
1944 ret = IRQ_HANDLED;
1945 goto bail;
1946 }
1947
1948 istat = qib_read_kreg64(dd, kr_intstatus);
1949
1950 if (unlikely(!istat)) {
1951 ret = IRQ_NONE; /* not our interrupt, or already handled */
1952 goto bail;
1953 }
1954 if (unlikely(istat == -1)) {
1955 qib_bad_intrstatus(dd);
1956 /* don't know if it was our interrupt or not */
1957 ret = IRQ_NONE;
1958 goto bail;
1959 }
1960
1961 qib_stats.sps_ints++;
1962 if (dd->int_counter != (u32) -1)
1963 dd->int_counter++;
1964
1965 if (unlikely(istat & (~QLOGIC_IB_I_BITSEXTANT |
1966 QLOGIC_IB_I_GPIO | QLOGIC_IB_I_ERROR)))
1967 unlikely_7220_intr(dd, istat);
1968
1969 /*
1970 * Clear the interrupt bits we found set, relatively early, so we
1971 * "know" know the chip will have seen this by the time we process
1972 * the queue, and will re-interrupt if necessary. The processor
1973 * itself won't take the interrupt again until we return.
1974 */
1975 qib_write_kreg(dd, kr_intclear, istat);
1976
1977 /*
1978 * Handle kernel receive queues before checking for pio buffers
1979 * available since receives can overflow; piobuf waiters can afford
1980 * a few extra cycles, since they were waiting anyway.
1981 */
1982 ctxtrbits = istat &
1983 ((QLOGIC_IB_I_RCVAVAIL_MASK << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
1984 (QLOGIC_IB_I_RCVURG_MASK << QLOGIC_IB_I_RCVURG_SHIFT));
1985 if (ctxtrbits) {
1986 rmask = (1ULL << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
1987 (1ULL << QLOGIC_IB_I_RCVURG_SHIFT);
1988 for (i = 0; i < dd->first_user_ctxt; i++) {
1989 if (ctxtrbits & rmask) {
1990 ctxtrbits &= ~rmask;
1991 qib_kreceive(dd->rcd[i], NULL, NULL);
1992 }
1993 rmask <<= 1;
1994 }
1995 if (ctxtrbits) {
1996 ctxtrbits =
1997 (ctxtrbits >> QLOGIC_IB_I_RCVAVAIL_SHIFT) |
1998 (ctxtrbits >> QLOGIC_IB_I_RCVURG_SHIFT);
1999 qib_handle_urcv(dd, ctxtrbits);
2000 }
2001 }
2002
2003 /* only call for SDmaInt */
2004 if (istat & QLOGIC_IB_I_SDMAINT)
2005 sdma_7220_intr(dd->pport, istat);
2006
2007 if ((istat & QLOGIC_IB_I_SPIOBUFAVAIL) && (dd->flags & QIB_INITTED))
2008 qib_ib_piobufavail(dd);
2009
2010 ret = IRQ_HANDLED;
2011 bail:
2012 return ret;
2013 }
2014
2015 /*
2016 * Set up our chip-specific interrupt handler.
2017 * The interrupt type has already been setup, so
2018 * we just need to do the registration and error checking.
2019 * If we are using MSI interrupts, we may fall back to
2020 * INTx later, if the interrupt handler doesn't get called
2021 * within 1/2 second (see verify_interrupt()).
2022 */
2023 static void qib_setup_7220_interrupt(struct qib_devdata *dd)
2024 {
2025 if (!dd->cspec->irq)
2026 qib_dev_err(dd, "irq is 0, BIOS error? Interrupts won't "
2027 "work\n");
2028 else {
2029 int ret = request_irq(dd->cspec->irq, qib_7220intr,
2030 dd->msi_lo ? 0 : IRQF_SHARED,
2031 QIB_DRV_NAME, dd);
2032
2033 if (ret)
2034 qib_dev_err(dd, "Couldn't setup %s interrupt "
2035 "(irq=%d): %d\n", dd->msi_lo ?
2036 "MSI" : "INTx", dd->cspec->irq, ret);
2037 }
2038 }
2039
2040 /**
2041 * qib_7220_boardname - fill in the board name
2042 * @dd: the qlogic_ib device
2043 *
2044 * info is based on the board revision register
2045 */
2046 static void qib_7220_boardname(struct qib_devdata *dd)
2047 {
2048 char *n;
2049 u32 boardid, namelen;
2050
2051 boardid = SYM_FIELD(dd->revision, Revision,
2052 BoardID);
2053
2054 switch (boardid) {
2055 case 1:
2056 n = "InfiniPath_QLE7240";
2057 break;
2058 case 2:
2059 n = "InfiniPath_QLE7280";
2060 break;
2061 default:
2062 qib_dev_err(dd, "Unknown 7220 board with ID %u\n", boardid);
2063 n = "Unknown_InfiniPath_7220";
2064 break;
2065 }
2066
2067 namelen = strlen(n) + 1;
2068 dd->boardname = kmalloc(namelen, GFP_KERNEL);
2069 if (!dd->boardname)
2070 qib_dev_err(dd, "Failed allocation for board name: %s\n", n);
2071 else
2072 snprintf(dd->boardname, namelen, "%s", n);
2073
2074 if (dd->majrev != 5 || !dd->minrev || dd->minrev > 2)
2075 qib_dev_err(dd, "Unsupported InfiniPath hardware "
2076 "revision %u.%u!\n",
2077 dd->majrev, dd->minrev);
2078
2079 snprintf(dd->boardversion, sizeof(dd->boardversion),
2080 "ChipABI %u.%u, %s, InfiniPath%u %u.%u, SW Compat %u\n",
2081 QIB_CHIP_VERS_MAJ, QIB_CHIP_VERS_MIN, dd->boardname,
2082 (unsigned)SYM_FIELD(dd->revision, Revision_R, Arch),
2083 dd->majrev, dd->minrev,
2084 (unsigned)SYM_FIELD(dd->revision, Revision_R, SW));
2085 }
2086
2087 /*
2088 * This routine sleeps, so it can only be called from user context, not
2089 * from interrupt context.
2090 */
2091 static int qib_setup_7220_reset(struct qib_devdata *dd)
2092 {
2093 u64 val;
2094 int i;
2095 int ret;
2096 u16 cmdval;
2097 u8 int_line, clinesz;
2098 unsigned long flags;
2099
2100 qib_pcie_getcmd(dd, &cmdval, &int_line, &clinesz);
2101
2102 /* Use dev_err so it shows up in logs, etc. */
2103 qib_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->unit);
2104
2105 /* no interrupts till re-initted */
2106 qib_7220_set_intr_state(dd, 0);
2107
2108 dd->pport->cpspec->ibdeltainprog = 0;
2109 dd->pport->cpspec->ibsymdelta = 0;
2110 dd->pport->cpspec->iblnkerrdelta = 0;
2111
2112 /*
2113 * Keep chip from being accessed until we are ready. Use
2114 * writeq() directly, to allow the write even though QIB_PRESENT
2115 * isn't set.
2116 */
2117 dd->flags &= ~(QIB_INITTED | QIB_PRESENT);
2118 dd->int_counter = 0; /* so we check interrupts work again */
2119 val = dd->control | QLOGIC_IB_C_RESET;
2120 writeq(val, &dd->kregbase[kr_control]);
2121 mb(); /* prevent compiler reordering around actual reset */
2122
2123 for (i = 1; i <= 5; i++) {
2124 /*
2125 * Allow MBIST, etc. to complete; longer on each retry.
2126 * We sometimes get machine checks from bus timeout if no
2127 * response, so for now, make it *really* long.
2128 */
2129 msleep(1000 + (1 + i) * 2000);
2130
2131 qib_pcie_reenable(dd, cmdval, int_line, clinesz);
2132
2133 /*
2134 * Use readq directly, so we don't need to mark it as PRESENT
2135 * until we get a successful indication that all is well.
2136 */
2137 val = readq(&dd->kregbase[kr_revision]);
2138 if (val == dd->revision) {
2139 dd->flags |= QIB_PRESENT; /* it's back */
2140 ret = qib_reinit_intr(dd);
2141 goto bail;
2142 }
2143 }
2144 ret = 0; /* failed */
2145
2146 bail:
2147 if (ret) {
2148 if (qib_pcie_params(dd, dd->lbus_width, NULL, NULL))
2149 qib_dev_err(dd, "Reset failed to setup PCIe or "
2150 "interrupts; continuing anyway\n");
2151
2152 /* hold IBC in reset, no sends, etc till later */
2153 qib_write_kreg(dd, kr_control, 0ULL);
2154
2155 /* clear the reset error, init error/hwerror mask */
2156 qib_7220_init_hwerrors(dd);
2157
2158 /* do setup similar to speed or link-width changes */
2159 if (dd->pport->cpspec->ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK)
2160 dd->cspec->presets_needed = 1;
2161 spin_lock_irqsave(&dd->pport->lflags_lock, flags);
2162 dd->pport->lflags |= QIBL_IB_FORCE_NOTIFY;
2163 dd->pport->lflags &= ~QIBL_IB_AUTONEG_FAILED;
2164 spin_unlock_irqrestore(&dd->pport->lflags_lock, flags);
2165 }
2166
2167 return ret;
2168 }
2169
2170 /**
2171 * qib_7220_put_tid - write a TID to the chip
2172 * @dd: the qlogic_ib device
2173 * @tidptr: pointer to the expected TID (in chip) to update
2174 * @tidtype: 0 for eager, 1 for expected
2175 * @pa: physical address of in memory buffer; tidinvalid if freeing
2176 */
2177 static void qib_7220_put_tid(struct qib_devdata *dd, u64 __iomem *tidptr,
2178 u32 type, unsigned long pa)
2179 {
2180 if (pa != dd->tidinvalid) {
2181 u64 chippa = pa >> IBA7220_TID_PA_SHIFT;
2182
2183 /* paranoia checks */
2184 if (pa != (chippa << IBA7220_TID_PA_SHIFT)) {
2185 qib_dev_err(dd, "Physaddr %lx not 2KB aligned!\n",
2186 pa);
2187 return;
2188 }
2189 if (chippa >= (1UL << IBA7220_TID_SZ_SHIFT)) {
2190 qib_dev_err(dd, "Physical page address 0x%lx "
2191 "larger than supported\n", pa);
2192 return;
2193 }
2194
2195 if (type == RCVHQ_RCV_TYPE_EAGER)
2196 chippa |= dd->tidtemplate;
2197 else /* for now, always full 4KB page */
2198 chippa |= IBA7220_TID_SZ_4K;
2199 pa = chippa;
2200 }
2201 writeq(pa, tidptr);
2202 mmiowb();
2203 }
2204
2205 /**
2206 * qib_7220_clear_tids - clear all TID entries for a ctxt, expected and eager
2207 * @dd: the qlogic_ib device
2208 * @ctxt: the ctxt
2209 *
2210 * clear all TID entries for a ctxt, expected and eager.
2211 * Used from qib_close(). On this chip, TIDs are only 32 bits,
2212 * not 64, but they are still on 64 bit boundaries, so tidbase
2213 * is declared as u64 * for the pointer math, even though we write 32 bits
2214 */
2215 static void qib_7220_clear_tids(struct qib_devdata *dd,
2216 struct qib_ctxtdata *rcd)
2217 {
2218 u64 __iomem *tidbase;
2219 unsigned long tidinv;
2220 u32 ctxt;
2221 int i;
2222
2223 if (!dd->kregbase || !rcd)
2224 return;
2225
2226 ctxt = rcd->ctxt;
2227
2228 tidinv = dd->tidinvalid;
2229 tidbase = (u64 __iomem *)
2230 ((char __iomem *)(dd->kregbase) +
2231 dd->rcvtidbase +
2232 ctxt * dd->rcvtidcnt * sizeof(*tidbase));
2233
2234 for (i = 0; i < dd->rcvtidcnt; i++)
2235 qib_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
2236 tidinv);
2237
2238 tidbase = (u64 __iomem *)
2239 ((char __iomem *)(dd->kregbase) +
2240 dd->rcvegrbase +
2241 rcd->rcvegr_tid_base * sizeof(*tidbase));
2242
2243 for (i = 0; i < rcd->rcvegrcnt; i++)
2244 qib_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
2245 tidinv);
2246 }
2247
2248 /**
2249 * qib_7220_tidtemplate - setup constants for TID updates
2250 * @dd: the qlogic_ib device
2251 *
2252 * We setup stuff that we use a lot, to avoid calculating each time
2253 */
2254 static void qib_7220_tidtemplate(struct qib_devdata *dd)
2255 {
2256 if (dd->rcvegrbufsize == 2048)
2257 dd->tidtemplate = IBA7220_TID_SZ_2K;
2258 else if (dd->rcvegrbufsize == 4096)
2259 dd->tidtemplate = IBA7220_TID_SZ_4K;
2260 dd->tidinvalid = 0;
2261 }
2262
2263 /**
2264 * qib_init_7220_get_base_info - set chip-specific flags for user code
2265 * @rcd: the qlogic_ib ctxt
2266 * @kbase: qib_base_info pointer
2267 *
2268 * We set the PCIE flag because the lower bandwidth on PCIe vs
2269 * HyperTransport can affect some user packet algorithims.
2270 */
2271 static int qib_7220_get_base_info(struct qib_ctxtdata *rcd,
2272 struct qib_base_info *kinfo)
2273 {
2274 kinfo->spi_runtime_flags |= QIB_RUNTIME_PCIE |
2275 QIB_RUNTIME_NODMA_RTAIL | QIB_RUNTIME_SDMA;
2276
2277 if (rcd->dd->flags & QIB_USE_SPCL_TRIG)
2278 kinfo->spi_runtime_flags |= QIB_RUNTIME_SPECIAL_TRIGGER;
2279
2280 return 0;
2281 }
2282
2283 static struct qib_message_header *
2284 qib_7220_get_msgheader(struct qib_devdata *dd, __le32 *rhf_addr)
2285 {
2286 u32 offset = qib_hdrget_offset(rhf_addr);
2287
2288 return (struct qib_message_header *)
2289 (rhf_addr - dd->rhf_offset + offset);
2290 }
2291
2292 static void qib_7220_config_ctxts(struct qib_devdata *dd)
2293 {
2294 unsigned long flags;
2295 u32 nchipctxts;
2296
2297 nchipctxts = qib_read_kreg32(dd, kr_portcnt);
2298 dd->cspec->numctxts = nchipctxts;
2299 if (qib_n_krcv_queues > 1) {
2300 dd->qpn_mask = 0x3e;
2301 dd->first_user_ctxt = qib_n_krcv_queues * dd->num_pports;
2302 if (dd->first_user_ctxt > nchipctxts)
2303 dd->first_user_ctxt = nchipctxts;
2304 } else
2305 dd->first_user_ctxt = dd->num_pports;
2306 dd->n_krcv_queues = dd->first_user_ctxt;
2307
2308 if (!qib_cfgctxts) {
2309 int nctxts = dd->first_user_ctxt + num_online_cpus();
2310
2311 if (nctxts <= 5)
2312 dd->ctxtcnt = 5;
2313 else if (nctxts <= 9)
2314 dd->ctxtcnt = 9;
2315 else if (nctxts <= nchipctxts)
2316 dd->ctxtcnt = nchipctxts;
2317 } else if (qib_cfgctxts <= nchipctxts)
2318 dd->ctxtcnt = qib_cfgctxts;
2319 if (!dd->ctxtcnt) /* none of the above, set to max */
2320 dd->ctxtcnt = nchipctxts;
2321
2322 /*
2323 * Chip can be configured for 5, 9, or 17 ctxts, and choice
2324 * affects number of eager TIDs per ctxt (1K, 2K, 4K).
2325 * Lock to be paranoid about later motion, etc.
2326 */
2327 spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
2328 if (dd->ctxtcnt > 9)
2329 dd->rcvctrl |= 2ULL << IBA7220_R_CTXTCFG_SHIFT;
2330 else if (dd->ctxtcnt > 5)
2331 dd->rcvctrl |= 1ULL << IBA7220_R_CTXTCFG_SHIFT;
2332 /* else configure for default 5 receive ctxts */
2333 if (dd->qpn_mask)
2334 dd->rcvctrl |= 1ULL << QIB_7220_RcvCtrl_RcvQPMapEnable_LSB;
2335 qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
2336 spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
2337
2338 /* kr_rcvegrcnt changes based on the number of contexts enabled */
2339 dd->cspec->rcvegrcnt = qib_read_kreg32(dd, kr_rcvegrcnt);
2340 dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt, IBA7220_KRCVEGRCNT);
2341 }
2342
2343 static int qib_7220_get_ib_cfg(struct qib_pportdata *ppd, int which)
2344 {
2345 int lsb, ret = 0;
2346 u64 maskr; /* right-justified mask */
2347
2348 switch (which) {
2349 case QIB_IB_CFG_LWID_ENB: /* Get allowed Link-width */
2350 ret = ppd->link_width_enabled;
2351 goto done;
2352
2353 case QIB_IB_CFG_LWID: /* Get currently active Link-width */
2354 ret = ppd->link_width_active;
2355 goto done;
2356
2357 case QIB_IB_CFG_SPD_ENB: /* Get allowed Link speeds */
2358 ret = ppd->link_speed_enabled;
2359 goto done;
2360
2361 case QIB_IB_CFG_SPD: /* Get current Link spd */
2362 ret = ppd->link_speed_active;
2363 goto done;
2364
2365 case QIB_IB_CFG_RXPOL_ENB: /* Get Auto-RX-polarity enable */
2366 lsb = IBA7220_IBC_RXPOL_SHIFT;
2367 maskr = IBA7220_IBC_RXPOL_MASK;
2368 break;
2369
2370 case QIB_IB_CFG_LREV_ENB: /* Get Auto-Lane-reversal enable */
2371 lsb = IBA7220_IBC_LREV_SHIFT;
2372 maskr = IBA7220_IBC_LREV_MASK;
2373 break;
2374
2375 case QIB_IB_CFG_LINKLATENCY:
2376 ret = qib_read_kreg64(ppd->dd, kr_ibcddrstatus)
2377 & IBA7220_DDRSTAT_LINKLAT_MASK;
2378 goto done;
2379
2380 case QIB_IB_CFG_OP_VLS:
2381 ret = ppd->vls_operational;
2382 goto done;
2383
2384 case QIB_IB_CFG_VL_HIGH_CAP:
2385 ret = 0;
2386 goto done;
2387
2388 case QIB_IB_CFG_VL_LOW_CAP:
2389 ret = 0;
2390 goto done;
2391
2392 case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
2393 ret = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2394 OverrunThreshold);
2395 goto done;
2396
2397 case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
2398 ret = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2399 PhyerrThreshold);
2400 goto done;
2401
2402 case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
2403 /* will only take effect when the link state changes */
2404 ret = (ppd->cpspec->ibcctrl &
2405 SYM_MASK(IBCCtrl, LinkDownDefaultState)) ?
2406 IB_LINKINITCMD_SLEEP : IB_LINKINITCMD_POLL;
2407 goto done;
2408
2409 case QIB_IB_CFG_HRTBT: /* Get Heartbeat off/enable/auto */
2410 lsb = IBA7220_IBC_HRTBT_SHIFT;
2411 maskr = IBA7220_IBC_HRTBT_MASK;
2412 break;
2413
2414 case QIB_IB_CFG_PMA_TICKS:
2415 /*
2416 * 0x00 = 10x link transfer rate or 4 nsec. for 2.5Gbs
2417 * Since the clock is always 250MHz, the value is 1 or 0.
2418 */
2419 ret = (ppd->link_speed_active == QIB_IB_DDR);
2420 goto done;
2421
2422 default:
2423 ret = -EINVAL;
2424 goto done;
2425 }
2426 ret = (int)((ppd->cpspec->ibcddrctrl >> lsb) & maskr);
2427 done:
2428 return ret;
2429 }
2430
2431 static int qib_7220_set_ib_cfg(struct qib_pportdata *ppd, int which, u32 val)
2432 {
2433 struct qib_devdata *dd = ppd->dd;
2434 u64 maskr; /* right-justified mask */
2435 int lsb, ret = 0, setforce = 0;
2436 u16 lcmd, licmd;
2437 unsigned long flags;
2438 u32 tmp = 0;
2439
2440 switch (which) {
2441 case QIB_IB_CFG_LIDLMC:
2442 /*
2443 * Set LID and LMC. Combined to avoid possible hazard
2444 * caller puts LMC in 16MSbits, DLID in 16LSbits of val
2445 */
2446 lsb = IBA7220_IBC_DLIDLMC_SHIFT;
2447 maskr = IBA7220_IBC_DLIDLMC_MASK;
2448 break;
2449
2450 case QIB_IB_CFG_LWID_ENB: /* set allowed Link-width */
2451 /*
2452 * As with speed, only write the actual register if
2453 * the link is currently down, otherwise takes effect
2454 * on next link change.
2455 */
2456 ppd->link_width_enabled = val;
2457 if (!(ppd->lflags & QIBL_LINKDOWN))
2458 goto bail;
2459 /*
2460 * We set the QIBL_IB_FORCE_NOTIFY bit so updown
2461 * will get called because we want update
2462 * link_width_active, and the change may not take
2463 * effect for some time (if we are in POLL), so this
2464 * flag will force the updown routine to be called
2465 * on the next ibstatuschange down interrupt, even
2466 * if it's not an down->up transition.
2467 */
2468 val--; /* convert from IB to chip */
2469 maskr = IBA7220_IBC_WIDTH_MASK;
2470 lsb = IBA7220_IBC_WIDTH_SHIFT;
2471 setforce = 1;
2472 break;
2473
2474 case QIB_IB_CFG_SPD_ENB: /* set allowed Link speeds */
2475 /*
2476 * If we turn off IB1.2, need to preset SerDes defaults,
2477 * but not right now. Set a flag for the next time
2478 * we command the link down. As with width, only write the
2479 * actual register if the link is currently down, otherwise
2480 * takes effect on next link change. Since setting is being
2481 * explicitly requested (via MAD or sysfs), clear autoneg
2482 * failure status if speed autoneg is enabled.
2483 */
2484 ppd->link_speed_enabled = val;
2485 if ((ppd->cpspec->ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK) &&
2486 !(val & (val - 1)))
2487 dd->cspec->presets_needed = 1;
2488 if (!(ppd->lflags & QIBL_LINKDOWN))
2489 goto bail;
2490 /*
2491 * We set the QIBL_IB_FORCE_NOTIFY bit so updown
2492 * will get called because we want update
2493 * link_speed_active, and the change may not take
2494 * effect for some time (if we are in POLL), so this
2495 * flag will force the updown routine to be called
2496 * on the next ibstatuschange down interrupt, even
2497 * if it's not an down->up transition.
2498 */
2499 if (val == (QIB_IB_SDR | QIB_IB_DDR)) {
2500 val = IBA7220_IBC_SPEED_AUTONEG_MASK |
2501 IBA7220_IBC_IBTA_1_2_MASK;
2502 spin_lock_irqsave(&ppd->lflags_lock, flags);
2503 ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
2504 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2505 } else
2506 val = val == QIB_IB_DDR ?
2507 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
2508 maskr = IBA7220_IBC_SPEED_AUTONEG_MASK |
2509 IBA7220_IBC_IBTA_1_2_MASK;
2510 /* IBTA 1.2 mode + speed bits are contiguous */
2511 lsb = SYM_LSB(IBCDDRCtrl, IB_ENHANCED_MODE);
2512 setforce = 1;
2513 break;
2514
2515 case QIB_IB_CFG_RXPOL_ENB: /* set Auto-RX-polarity enable */
2516 lsb = IBA7220_IBC_RXPOL_SHIFT;
2517 maskr = IBA7220_IBC_RXPOL_MASK;
2518 break;
2519
2520 case QIB_IB_CFG_LREV_ENB: /* set Auto-Lane-reversal enable */
2521 lsb = IBA7220_IBC_LREV_SHIFT;
2522 maskr = IBA7220_IBC_LREV_MASK;
2523 break;
2524
2525 case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
2526 maskr = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2527 OverrunThreshold);
2528 if (maskr != val) {
2529 ppd->cpspec->ibcctrl &=
2530 ~SYM_MASK(IBCCtrl, OverrunThreshold);
2531 ppd->cpspec->ibcctrl |= (u64) val <<
2532 SYM_LSB(IBCCtrl, OverrunThreshold);
2533 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2534 qib_write_kreg(dd, kr_scratch, 0);
2535 }
2536 goto bail;
2537
2538 case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
2539 maskr = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2540 PhyerrThreshold);
2541 if (maskr != val) {
2542 ppd->cpspec->ibcctrl &=
2543 ~SYM_MASK(IBCCtrl, PhyerrThreshold);
2544 ppd->cpspec->ibcctrl |= (u64) val <<
2545 SYM_LSB(IBCCtrl, PhyerrThreshold);
2546 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2547 qib_write_kreg(dd, kr_scratch, 0);
2548 }
2549 goto bail;
2550
2551 case QIB_IB_CFG_PKEYS: /* update pkeys */
2552 maskr = (u64) ppd->pkeys[0] | ((u64) ppd->pkeys[1] << 16) |
2553 ((u64) ppd->pkeys[2] << 32) |
2554 ((u64) ppd->pkeys[3] << 48);
2555 qib_write_kreg(dd, kr_partitionkey, maskr);
2556 goto bail;
2557
2558 case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
2559 /* will only take effect when the link state changes */
2560 if (val == IB_LINKINITCMD_POLL)
2561 ppd->cpspec->ibcctrl &=
2562 ~SYM_MASK(IBCCtrl, LinkDownDefaultState);
2563 else /* SLEEP */
2564 ppd->cpspec->ibcctrl |=
2565 SYM_MASK(IBCCtrl, LinkDownDefaultState);
2566 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2567 qib_write_kreg(dd, kr_scratch, 0);
2568 goto bail;
2569
2570 case QIB_IB_CFG_MTU: /* update the MTU in IBC */
2571 /*
2572 * Update our housekeeping variables, and set IBC max
2573 * size, same as init code; max IBC is max we allow in
2574 * buffer, less the qword pbc, plus 1 for ICRC, in dwords
2575 * Set even if it's unchanged, print debug message only
2576 * on changes.
2577 */
2578 val = (ppd->ibmaxlen >> 2) + 1;
2579 ppd->cpspec->ibcctrl &= ~SYM_MASK(IBCCtrl, MaxPktLen);
2580 ppd->cpspec->ibcctrl |= (u64)val << SYM_LSB(IBCCtrl, MaxPktLen);
2581 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2582 qib_write_kreg(dd, kr_scratch, 0);
2583 goto bail;
2584
2585 case QIB_IB_CFG_LSTATE: /* set the IB link state */
2586 switch (val & 0xffff0000) {
2587 case IB_LINKCMD_DOWN:
2588 lcmd = QLOGIC_IB_IBCC_LINKCMD_DOWN;
2589 if (!ppd->cpspec->ibdeltainprog &&
2590 qib_compat_ddr_negotiate) {
2591 ppd->cpspec->ibdeltainprog = 1;
2592 ppd->cpspec->ibsymsnap =
2593 read_7220_creg32(dd, cr_ibsymbolerr);
2594 ppd->cpspec->iblnkerrsnap =
2595 read_7220_creg32(dd, cr_iblinkerrrecov);
2596 }
2597 break;
2598
2599 case IB_LINKCMD_ARMED:
2600 lcmd = QLOGIC_IB_IBCC_LINKCMD_ARMED;
2601 break;
2602
2603 case IB_LINKCMD_ACTIVE:
2604 lcmd = QLOGIC_IB_IBCC_LINKCMD_ACTIVE;
2605 break;
2606
2607 default:
2608 ret = -EINVAL;
2609 qib_dev_err(dd, "bad linkcmd req 0x%x\n", val >> 16);
2610 goto bail;
2611 }
2612 switch (val & 0xffff) {
2613 case IB_LINKINITCMD_NOP:
2614 licmd = 0;
2615 break;
2616
2617 case IB_LINKINITCMD_POLL:
2618 licmd = QLOGIC_IB_IBCC_LINKINITCMD_POLL;
2619 break;
2620
2621 case IB_LINKINITCMD_SLEEP:
2622 licmd = QLOGIC_IB_IBCC_LINKINITCMD_SLEEP;
2623 break;
2624
2625 case IB_LINKINITCMD_DISABLE:
2626 licmd = QLOGIC_IB_IBCC_LINKINITCMD_DISABLE;
2627 ppd->cpspec->chase_end = 0;
2628 /*
2629 * stop state chase counter and timer, if running.
2630 * wait forpending timer, but don't clear .data (ppd)!
2631 */
2632 if (ppd->cpspec->chase_timer.expires) {
2633 del_timer_sync(&ppd->cpspec->chase_timer);
2634 ppd->cpspec->chase_timer.expires = 0;
2635 }
2636 break;
2637
2638 default:
2639 ret = -EINVAL;
2640 qib_dev_err(dd, "bad linkinitcmd req 0x%x\n",
2641 val & 0xffff);
2642 goto bail;
2643 }
2644 qib_set_ib_7220_lstate(ppd, lcmd, licmd);
2645
2646 maskr = IBA7220_IBC_WIDTH_MASK;
2647 lsb = IBA7220_IBC_WIDTH_SHIFT;
2648 tmp = (ppd->cpspec->ibcddrctrl >> lsb) & maskr;
2649 /* If the width active on the chip does not match the
2650 * width in the shadow register, write the new active
2651 * width to the chip.
2652 * We don't have to worry about speed as the speed is taken
2653 * care of by set_7220_ibspeed_fast called by ib_updown.
2654 */
2655 if (ppd->link_width_enabled-1 != tmp) {
2656 ppd->cpspec->ibcddrctrl &= ~(maskr << lsb);
2657 ppd->cpspec->ibcddrctrl |=
2658 (((u64)(ppd->link_width_enabled-1) & maskr) <<
2659 lsb);
2660 qib_write_kreg(dd, kr_ibcddrctrl,
2661 ppd->cpspec->ibcddrctrl);
2662 qib_write_kreg(dd, kr_scratch, 0);
2663 spin_lock_irqsave(&ppd->lflags_lock, flags);
2664 ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
2665 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2666 }
2667 goto bail;
2668
2669 case QIB_IB_CFG_HRTBT: /* set Heartbeat off/enable/auto */
2670 if (val > IBA7220_IBC_HRTBT_MASK) {
2671 ret = -EINVAL;
2672 goto bail;
2673 }
2674 lsb = IBA7220_IBC_HRTBT_SHIFT;
2675 maskr = IBA7220_IBC_HRTBT_MASK;
2676 break;
2677
2678 default:
2679 ret = -EINVAL;
2680 goto bail;
2681 }
2682 ppd->cpspec->ibcddrctrl &= ~(maskr << lsb);
2683 ppd->cpspec->ibcddrctrl |= (((u64) val & maskr) << lsb);
2684 qib_write_kreg(dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
2685 qib_write_kreg(dd, kr_scratch, 0);
2686 if (setforce) {
2687 spin_lock_irqsave(&ppd->lflags_lock, flags);
2688 ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
2689 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2690 }
2691 bail:
2692 return ret;
2693 }
2694
2695 static int qib_7220_set_loopback(struct qib_pportdata *ppd, const char *what)
2696 {
2697 int ret = 0;
2698 u64 val, ddr;
2699
2700 if (!strncmp(what, "ibc", 3)) {
2701 ppd->cpspec->ibcctrl |= SYM_MASK(IBCCtrl, Loopback);
2702 val = 0; /* disable heart beat, so link will come up */
2703 qib_devinfo(ppd->dd->pcidev, "Enabling IB%u:%u IBC loopback\n",
2704 ppd->dd->unit, ppd->port);
2705 } else if (!strncmp(what, "off", 3)) {
2706 ppd->cpspec->ibcctrl &= ~SYM_MASK(IBCCtrl, Loopback);
2707 /* enable heart beat again */
2708 val = IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
2709 qib_devinfo(ppd->dd->pcidev, "Disabling IB%u:%u IBC loopback "
2710 "(normal)\n", ppd->dd->unit, ppd->port);
2711 } else
2712 ret = -EINVAL;
2713 if (!ret) {
2714 qib_write_kreg(ppd->dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2715 ddr = ppd->cpspec->ibcddrctrl & ~(IBA7220_IBC_HRTBT_MASK
2716 << IBA7220_IBC_HRTBT_SHIFT);
2717 ppd->cpspec->ibcddrctrl = ddr | val;
2718 qib_write_kreg(ppd->dd, kr_ibcddrctrl,
2719 ppd->cpspec->ibcddrctrl);
2720 qib_write_kreg(ppd->dd, kr_scratch, 0);
2721 }
2722 return ret;
2723 }
2724
2725 static void qib_update_7220_usrhead(struct qib_ctxtdata *rcd, u64 hd,
2726 u32 updegr, u32 egrhd, u32 npkts)
2727 {
2728 if (updegr)
2729 qib_write_ureg(rcd->dd, ur_rcvegrindexhead, egrhd, rcd->ctxt);
2730 mmiowb();
2731 qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
2732 mmiowb();
2733 }
2734
2735 static u32 qib_7220_hdrqempty(struct qib_ctxtdata *rcd)
2736 {
2737 u32 head, tail;
2738
2739 head = qib_read_ureg32(rcd->dd, ur_rcvhdrhead, rcd->ctxt);
2740 if (rcd->rcvhdrtail_kvaddr)
2741 tail = qib_get_rcvhdrtail(rcd);
2742 else
2743 tail = qib_read_ureg32(rcd->dd, ur_rcvhdrtail, rcd->ctxt);
2744 return head == tail;
2745 }
2746
2747 /*
2748 * Modify the RCVCTRL register in chip-specific way. This
2749 * is a function because bit positions and (future) register
2750 * location is chip-specifc, but the needed operations are
2751 * generic. <op> is a bit-mask because we often want to
2752 * do multiple modifications.
2753 */
2754 static void rcvctrl_7220_mod(struct qib_pportdata *ppd, unsigned int op,
2755 int ctxt)
2756 {
2757 struct qib_devdata *dd = ppd->dd;
2758 u64 mask, val;
2759 unsigned long flags;
2760
2761 spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
2762 if (op & QIB_RCVCTRL_TAILUPD_ENB)
2763 dd->rcvctrl |= (1ULL << IBA7220_R_TAILUPD_SHIFT);
2764 if (op & QIB_RCVCTRL_TAILUPD_DIS)
2765 dd->rcvctrl &= ~(1ULL << IBA7220_R_TAILUPD_SHIFT);
2766 if (op & QIB_RCVCTRL_PKEY_ENB)
2767 dd->rcvctrl &= ~(1ULL << IBA7220_R_PKEY_DIS_SHIFT);
2768 if (op & QIB_RCVCTRL_PKEY_DIS)
2769 dd->rcvctrl |= (1ULL << IBA7220_R_PKEY_DIS_SHIFT);
2770 if (ctxt < 0)
2771 mask = (1ULL << dd->ctxtcnt) - 1;
2772 else
2773 mask = (1ULL << ctxt);
2774 if (op & QIB_RCVCTRL_CTXT_ENB) {
2775 /* always done for specific ctxt */
2776 dd->rcvctrl |= (mask << SYM_LSB(RcvCtrl, PortEnable));
2777 if (!(dd->flags & QIB_NODMA_RTAIL))
2778 dd->rcvctrl |= 1ULL << IBA7220_R_TAILUPD_SHIFT;
2779 /* Write these registers before the context is enabled. */
2780 qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt,
2781 dd->rcd[ctxt]->rcvhdrqtailaddr_phys);
2782 qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt,
2783 dd->rcd[ctxt]->rcvhdrq_phys);
2784 dd->rcd[ctxt]->seq_cnt = 1;
2785 }
2786 if (op & QIB_RCVCTRL_CTXT_DIS)
2787 dd->rcvctrl &= ~(mask << SYM_LSB(RcvCtrl, PortEnable));
2788 if (op & QIB_RCVCTRL_INTRAVAIL_ENB)
2789 dd->rcvctrl |= (mask << IBA7220_R_INTRAVAIL_SHIFT);
2790 if (op & QIB_RCVCTRL_INTRAVAIL_DIS)
2791 dd->rcvctrl &= ~(mask << IBA7220_R_INTRAVAIL_SHIFT);
2792 qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
2793 if ((op & QIB_RCVCTRL_INTRAVAIL_ENB) && dd->rhdrhead_intr_off) {
2794 /* arm rcv interrupt */
2795 val = qib_read_ureg32(dd, ur_rcvhdrhead, ctxt) |
2796 dd->rhdrhead_intr_off;
2797 qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
2798 }
2799 if (op & QIB_RCVCTRL_CTXT_ENB) {
2800 /*
2801 * Init the context registers also; if we were
2802 * disabled, tail and head should both be zero
2803 * already from the enable, but since we don't
2804 * know, we have to do it explicitly.
2805 */
2806 val = qib_read_ureg32(dd, ur_rcvegrindextail, ctxt);
2807 qib_write_ureg(dd, ur_rcvegrindexhead, val, ctxt);
2808
2809 val = qib_read_ureg32(dd, ur_rcvhdrtail, ctxt);
2810 dd->rcd[ctxt]->head = val;
2811 /* If kctxt, interrupt on next receive. */
2812 if (ctxt < dd->first_user_ctxt)
2813 val |= dd->rhdrhead_intr_off;
2814 qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
2815 }
2816 if (op & QIB_RCVCTRL_CTXT_DIS) {
2817 if (ctxt >= 0) {
2818 qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt, 0);
2819 qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt, 0);
2820 } else {
2821 unsigned i;
2822
2823 for (i = 0; i < dd->cfgctxts; i++) {
2824 qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr,
2825 i, 0);
2826 qib_write_kreg_ctxt(dd, kr_rcvhdraddr, i, 0);
2827 }
2828 }
2829 }
2830 spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
2831 }
2832
2833 /*
2834 * Modify the SENDCTRL register in chip-specific way. This
2835 * is a function there may be multiple such registers with
2836 * slightly different layouts. To start, we assume the
2837 * "canonical" register layout of the first chips.
2838 * Chip requires no back-back sendctrl writes, so write
2839 * scratch register after writing sendctrl
2840 */
2841 static void sendctrl_7220_mod(struct qib_pportdata *ppd, u32 op)
2842 {
2843 struct qib_devdata *dd = ppd->dd;
2844 u64 tmp_dd_sendctrl;
2845 unsigned long flags;
2846
2847 spin_lock_irqsave(&dd->sendctrl_lock, flags);
2848
2849 /* First the ones that are "sticky", saved in shadow */
2850 if (op & QIB_SENDCTRL_CLEAR)
2851 dd->sendctrl = 0;
2852 if (op & QIB_SENDCTRL_SEND_DIS)
2853 dd->sendctrl &= ~SYM_MASK(SendCtrl, SPioEnable);
2854 else if (op & QIB_SENDCTRL_SEND_ENB) {
2855 dd->sendctrl |= SYM_MASK(SendCtrl, SPioEnable);
2856 if (dd->flags & QIB_USE_SPCL_TRIG)
2857 dd->sendctrl |= SYM_MASK(SendCtrl,
2858 SSpecialTriggerEn);
2859 }
2860 if (op & QIB_SENDCTRL_AVAIL_DIS)
2861 dd->sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
2862 else if (op & QIB_SENDCTRL_AVAIL_ENB)
2863 dd->sendctrl |= SYM_MASK(SendCtrl, SendBufAvailUpd);
2864
2865 if (op & QIB_SENDCTRL_DISARM_ALL) {
2866 u32 i, last;
2867
2868 tmp_dd_sendctrl = dd->sendctrl;
2869 /*
2870 * disarm any that are not yet launched, disabling sends
2871 * and updates until done.
2872 */
2873 last = dd->piobcnt2k + dd->piobcnt4k;
2874 tmp_dd_sendctrl &=
2875 ~(SYM_MASK(SendCtrl, SPioEnable) |
2876 SYM_MASK(SendCtrl, SendBufAvailUpd));
2877 for (i = 0; i < last; i++) {
2878 qib_write_kreg(dd, kr_sendctrl,
2879 tmp_dd_sendctrl |
2880 SYM_MASK(SendCtrl, Disarm) | i);
2881 qib_write_kreg(dd, kr_scratch, 0);
2882 }
2883 }
2884
2885 tmp_dd_sendctrl = dd->sendctrl;
2886
2887 if (op & QIB_SENDCTRL_FLUSH)
2888 tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Abort);
2889 if (op & QIB_SENDCTRL_DISARM)
2890 tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Disarm) |
2891 ((op & QIB_7220_SendCtrl_DisarmPIOBuf_RMASK) <<
2892 SYM_LSB(SendCtrl, DisarmPIOBuf));
2893 if ((op & QIB_SENDCTRL_AVAIL_BLIP) &&
2894 (dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
2895 tmp_dd_sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
2896
2897 qib_write_kreg(dd, kr_sendctrl, tmp_dd_sendctrl);
2898 qib_write_kreg(dd, kr_scratch, 0);
2899
2900 if (op & QIB_SENDCTRL_AVAIL_BLIP) {
2901 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
2902 qib_write_kreg(dd, kr_scratch, 0);
2903 }
2904
2905 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
2906
2907 if (op & QIB_SENDCTRL_FLUSH) {
2908 u32 v;
2909 /*
2910 * ensure writes have hit chip, then do a few
2911 * more reads, to allow DMA of pioavail registers
2912 * to occur, so in-memory copy is in sync with
2913 * the chip. Not always safe to sleep.
2914 */
2915 v = qib_read_kreg32(dd, kr_scratch);
2916 qib_write_kreg(dd, kr_scratch, v);
2917 v = qib_read_kreg32(dd, kr_scratch);
2918 qib_write_kreg(dd, kr_scratch, v);
2919 qib_read_kreg32(dd, kr_scratch);
2920 }
2921 }
2922
2923 /**
2924 * qib_portcntr_7220 - read a per-port counter
2925 * @dd: the qlogic_ib device
2926 * @creg: the counter to snapshot
2927 */
2928 static u64 qib_portcntr_7220(struct qib_pportdata *ppd, u32 reg)
2929 {
2930 u64 ret = 0ULL;
2931 struct qib_devdata *dd = ppd->dd;
2932 u16 creg;
2933 /* 0xffff for unimplemented or synthesized counters */
2934 static const u16 xlator[] = {
2935 [QIBPORTCNTR_PKTSEND] = cr_pktsend,
2936 [QIBPORTCNTR_WORDSEND] = cr_wordsend,
2937 [QIBPORTCNTR_PSXMITDATA] = cr_psxmitdatacount,
2938 [QIBPORTCNTR_PSXMITPKTS] = cr_psxmitpktscount,
2939 [QIBPORTCNTR_PSXMITWAIT] = cr_psxmitwaitcount,
2940 [QIBPORTCNTR_SENDSTALL] = cr_sendstall,
2941 [QIBPORTCNTR_PKTRCV] = cr_pktrcv,
2942 [QIBPORTCNTR_PSRCVDATA] = cr_psrcvdatacount,
2943 [QIBPORTCNTR_PSRCVPKTS] = cr_psrcvpktscount,
2944 [QIBPORTCNTR_RCVEBP] = cr_rcvebp,
2945 [QIBPORTCNTR_RCVOVFL] = cr_rcvovfl,
2946 [QIBPORTCNTR_WORDRCV] = cr_wordrcv,
2947 [QIBPORTCNTR_RXDROPPKT] = cr_rxdroppkt,
2948 [QIBPORTCNTR_RXLOCALPHYERR] = cr_rxotherlocalphyerr,
2949 [QIBPORTCNTR_RXVLERR] = cr_rxvlerr,
2950 [QIBPORTCNTR_ERRICRC] = cr_erricrc,
2951 [QIBPORTCNTR_ERRVCRC] = cr_errvcrc,
2952 [QIBPORTCNTR_ERRLPCRC] = cr_errlpcrc,
2953 [QIBPORTCNTR_BADFORMAT] = cr_badformat,
2954 [QIBPORTCNTR_ERR_RLEN] = cr_err_rlen,
2955 [QIBPORTCNTR_IBSYMBOLERR] = cr_ibsymbolerr,
2956 [QIBPORTCNTR_INVALIDRLEN] = cr_invalidrlen,
2957 [QIBPORTCNTR_UNSUPVL] = cr_txunsupvl,
2958 [QIBPORTCNTR_EXCESSBUFOVFL] = cr_excessbufferovfl,
2959 [QIBPORTCNTR_ERRLINK] = cr_errlink,
2960 [QIBPORTCNTR_IBLINKDOWN] = cr_iblinkdown,
2961 [QIBPORTCNTR_IBLINKERRRECOV] = cr_iblinkerrrecov,
2962 [QIBPORTCNTR_LLI] = cr_locallinkintegrityerr,
2963 [QIBPORTCNTR_PSINTERVAL] = cr_psinterval,
2964 [QIBPORTCNTR_PSSTART] = cr_psstart,
2965 [QIBPORTCNTR_PSSTAT] = cr_psstat,
2966 [QIBPORTCNTR_VL15PKTDROP] = cr_vl15droppedpkt,
2967 [QIBPORTCNTR_ERRPKEY] = cr_errpkey,
2968 [QIBPORTCNTR_KHDROVFL] = 0xffff,
2969 };
2970
2971 if (reg >= ARRAY_SIZE(xlator)) {
2972 qib_devinfo(ppd->dd->pcidev,
2973 "Unimplemented portcounter %u\n", reg);
2974 goto done;
2975 }
2976 creg = xlator[reg];
2977
2978 if (reg == QIBPORTCNTR_KHDROVFL) {
2979 int i;
2980
2981 /* sum over all kernel contexts */
2982 for (i = 0; i < dd->first_user_ctxt; i++)
2983 ret += read_7220_creg32(dd, cr_portovfl + i);
2984 }
2985 if (creg == 0xffff)
2986 goto done;
2987
2988 /*
2989 * only fast incrementing counters are 64bit; use 32 bit reads to
2990 * avoid two independent reads when on opteron
2991 */
2992 if ((creg == cr_wordsend || creg == cr_wordrcv ||
2993 creg == cr_pktsend || creg == cr_pktrcv))
2994 ret = read_7220_creg(dd, creg);
2995 else
2996 ret = read_7220_creg32(dd, creg);
2997 if (creg == cr_ibsymbolerr) {
2998 if (dd->pport->cpspec->ibdeltainprog)
2999 ret -= ret - ppd->cpspec->ibsymsnap;
3000 ret -= dd->pport->cpspec->ibsymdelta;
3001 } else if (creg == cr_iblinkerrrecov) {
3002 if (dd->pport->cpspec->ibdeltainprog)
3003 ret -= ret - ppd->cpspec->iblnkerrsnap;
3004 ret -= dd->pport->cpspec->iblnkerrdelta;
3005 }
3006 done:
3007 return ret;
3008 }
3009
3010 /*
3011 * Device counter names (not port-specific), one line per stat,
3012 * single string. Used by utilities like ipathstats to print the stats
3013 * in a way which works for different versions of drivers, without changing
3014 * the utility. Names need to be 12 chars or less (w/o newline), for proper
3015 * display by utility.
3016 * Non-error counters are first.
3017 * Start of "error" conters is indicated by a leading "E " on the first
3018 * "error" counter, and doesn't count in label length.
3019 * The EgrOvfl list needs to be last so we truncate them at the configured
3020 * context count for the device.
3021 * cntr7220indices contains the corresponding register indices.
3022 */
3023 static const char cntr7220names[] =
3024 "Interrupts\n"
3025 "HostBusStall\n"
3026 "E RxTIDFull\n"
3027 "RxTIDInvalid\n"
3028 "Ctxt0EgrOvfl\n"
3029 "Ctxt1EgrOvfl\n"
3030 "Ctxt2EgrOvfl\n"
3031 "Ctxt3EgrOvfl\n"
3032 "Ctxt4EgrOvfl\n"
3033 "Ctxt5EgrOvfl\n"
3034 "Ctxt6EgrOvfl\n"
3035 "Ctxt7EgrOvfl\n"
3036 "Ctxt8EgrOvfl\n"
3037 "Ctxt9EgrOvfl\n"
3038 "Ctx10EgrOvfl\n"
3039 "Ctx11EgrOvfl\n"
3040 "Ctx12EgrOvfl\n"
3041 "Ctx13EgrOvfl\n"
3042 "Ctx14EgrOvfl\n"
3043 "Ctx15EgrOvfl\n"
3044 "Ctx16EgrOvfl\n";
3045
3046 static const size_t cntr7220indices[] = {
3047 cr_lbint,
3048 cr_lbflowstall,
3049 cr_errtidfull,
3050 cr_errtidvalid,
3051 cr_portovfl + 0,
3052 cr_portovfl + 1,
3053 cr_portovfl + 2,
3054 cr_portovfl + 3,
3055 cr_portovfl + 4,
3056 cr_portovfl + 5,
3057 cr_portovfl + 6,
3058 cr_portovfl + 7,
3059 cr_portovfl + 8,
3060 cr_portovfl + 9,
3061 cr_portovfl + 10,
3062 cr_portovfl + 11,
3063 cr_portovfl + 12,
3064 cr_portovfl + 13,
3065 cr_portovfl + 14,
3066 cr_portovfl + 15,
3067 cr_portovfl + 16,
3068 };
3069
3070 /*
3071 * same as cntr7220names and cntr7220indices, but for port-specific counters.
3072 * portcntr7220indices is somewhat complicated by some registers needing
3073 * adjustments of various kinds, and those are ORed with _PORT_VIRT_FLAG
3074 */
3075 static const char portcntr7220names[] =
3076 "TxPkt\n"
3077 "TxFlowPkt\n"
3078 "TxWords\n"
3079 "RxPkt\n"
3080 "RxFlowPkt\n"
3081 "RxWords\n"
3082 "TxFlowStall\n"
3083 "TxDmaDesc\n" /* 7220 and 7322-only */
3084 "E RxDlidFltr\n" /* 7220 and 7322-only */
3085 "IBStatusChng\n"
3086 "IBLinkDown\n"
3087 "IBLnkRecov\n"
3088 "IBRxLinkErr\n"
3089 "IBSymbolErr\n"
3090 "RxLLIErr\n"
3091 "RxBadFormat\n"
3092 "RxBadLen\n"
3093 "RxBufOvrfl\n"
3094 "RxEBP\n"
3095 "RxFlowCtlErr\n"
3096 "RxICRCerr\n"
3097 "RxLPCRCerr\n"
3098 "RxVCRCerr\n"
3099 "RxInvalLen\n"
3100 "RxInvalPKey\n"
3101 "RxPktDropped\n"
3102 "TxBadLength\n"
3103 "TxDropped\n"
3104 "TxInvalLen\n"
3105 "TxUnderrun\n"
3106 "TxUnsupVL\n"
3107 "RxLclPhyErr\n" /* 7220 and 7322-only */
3108 "RxVL15Drop\n" /* 7220 and 7322-only */
3109 "RxVlErr\n" /* 7220 and 7322-only */
3110 "XcessBufOvfl\n" /* 7220 and 7322-only */
3111 ;
3112
3113 #define _PORT_VIRT_FLAG 0x8000 /* "virtual", need adjustments */
3114 static const size_t portcntr7220indices[] = {
3115 QIBPORTCNTR_PKTSEND | _PORT_VIRT_FLAG,
3116 cr_pktsendflow,
3117 QIBPORTCNTR_WORDSEND | _PORT_VIRT_FLAG,
3118 QIBPORTCNTR_PKTRCV | _PORT_VIRT_FLAG,
3119 cr_pktrcvflowctrl,
3120 QIBPORTCNTR_WORDRCV | _PORT_VIRT_FLAG,
3121 QIBPORTCNTR_SENDSTALL | _PORT_VIRT_FLAG,
3122 cr_txsdmadesc,
3123 cr_rxdlidfltr,
3124 cr_ibstatuschange,
3125 QIBPORTCNTR_IBLINKDOWN | _PORT_VIRT_FLAG,
3126 QIBPORTCNTR_IBLINKERRRECOV | _PORT_VIRT_FLAG,
3127 QIBPORTCNTR_ERRLINK | _PORT_VIRT_FLAG,
3128 QIBPORTCNTR_IBSYMBOLERR | _PORT_VIRT_FLAG,
3129 QIBPORTCNTR_LLI | _PORT_VIRT_FLAG,
3130 QIBPORTCNTR_BADFORMAT | _PORT_VIRT_FLAG,
3131 QIBPORTCNTR_ERR_RLEN | _PORT_VIRT_FLAG,
3132 QIBPORTCNTR_RCVOVFL | _PORT_VIRT_FLAG,
3133 QIBPORTCNTR_RCVEBP | _PORT_VIRT_FLAG,
3134 cr_rcvflowctrl_err,
3135 QIBPORTCNTR_ERRICRC | _PORT_VIRT_FLAG,
3136 QIBPORTCNTR_ERRLPCRC | _PORT_VIRT_FLAG,
3137 QIBPORTCNTR_ERRVCRC | _PORT_VIRT_FLAG,
3138 QIBPORTCNTR_INVALIDRLEN | _PORT_VIRT_FLAG,
3139 QIBPORTCNTR_ERRPKEY | _PORT_VIRT_FLAG,
3140 QIBPORTCNTR_RXDROPPKT | _PORT_VIRT_FLAG,
3141 cr_invalidslen,
3142 cr_senddropped,
3143 cr_errslen,
3144 cr_sendunderrun,
3145 cr_txunsupvl,
3146 QIBPORTCNTR_RXLOCALPHYERR | _PORT_VIRT_FLAG,
3147 QIBPORTCNTR_VL15PKTDROP | _PORT_VIRT_FLAG,
3148 QIBPORTCNTR_RXVLERR | _PORT_VIRT_FLAG,
3149 QIBPORTCNTR_EXCESSBUFOVFL | _PORT_VIRT_FLAG,
3150 };
3151
3152 /* do all the setup to make the counter reads efficient later */
3153 static void init_7220_cntrnames(struct qib_devdata *dd)
3154 {
3155 int i, j = 0;
3156 char *s;
3157
3158 for (i = 0, s = (char *)cntr7220names; s && j <= dd->cfgctxts;
3159 i++) {
3160 /* we always have at least one counter before the egrovfl */
3161 if (!j && !strncmp("Ctxt0EgrOvfl", s + 1, 12))
3162 j = 1;
3163 s = strchr(s + 1, '\n');
3164 if (s && j)
3165 j++;
3166 }
3167 dd->cspec->ncntrs = i;
3168 if (!s)
3169 /* full list; size is without terminating null */
3170 dd->cspec->cntrnamelen = sizeof(cntr7220names) - 1;
3171 else
3172 dd->cspec->cntrnamelen = 1 + s - cntr7220names;
3173 dd->cspec->cntrs = kmalloc(dd->cspec->ncntrs
3174 * sizeof(u64), GFP_KERNEL);
3175 if (!dd->cspec->cntrs)
3176 qib_dev_err(dd, "Failed allocation for counters\n");
3177
3178 for (i = 0, s = (char *)portcntr7220names; s; i++)
3179 s = strchr(s + 1, '\n');
3180 dd->cspec->nportcntrs = i - 1;
3181 dd->cspec->portcntrnamelen = sizeof(portcntr7220names) - 1;
3182 dd->cspec->portcntrs = kmalloc(dd->cspec->nportcntrs
3183 * sizeof(u64), GFP_KERNEL);
3184 if (!dd->cspec->portcntrs)
3185 qib_dev_err(dd, "Failed allocation for portcounters\n");
3186 }
3187
3188 static u32 qib_read_7220cntrs(struct qib_devdata *dd, loff_t pos, char **namep,
3189 u64 **cntrp)
3190 {
3191 u32 ret;
3192
3193 if (!dd->cspec->cntrs) {
3194 ret = 0;
3195 goto done;
3196 }
3197
3198 if (namep) {
3199 *namep = (char *)cntr7220names;
3200 ret = dd->cspec->cntrnamelen;
3201 if (pos >= ret)
3202 ret = 0; /* final read after getting everything */
3203 } else {
3204 u64 *cntr = dd->cspec->cntrs;
3205 int i;
3206
3207 ret = dd->cspec->ncntrs * sizeof(u64);
3208 if (!cntr || pos >= ret) {
3209 /* everything read, or couldn't get memory */
3210 ret = 0;
3211 goto done;
3212 }
3213
3214 *cntrp = cntr;
3215 for (i = 0; i < dd->cspec->ncntrs; i++)
3216 *cntr++ = read_7220_creg32(dd, cntr7220indices[i]);
3217 }
3218 done:
3219 return ret;
3220 }
3221
3222 static u32 qib_read_7220portcntrs(struct qib_devdata *dd, loff_t pos, u32 port,
3223 char **namep, u64 **cntrp)
3224 {
3225 u32 ret;
3226
3227 if (!dd->cspec->portcntrs) {
3228 ret = 0;
3229 goto done;
3230 }
3231 if (namep) {
3232 *namep = (char *)portcntr7220names;
3233 ret = dd->cspec->portcntrnamelen;
3234 if (pos >= ret)
3235 ret = 0; /* final read after getting everything */
3236 } else {
3237 u64 *cntr = dd->cspec->portcntrs;
3238 struct qib_pportdata *ppd = &dd->pport[port];
3239 int i;
3240
3241 ret = dd->cspec->nportcntrs * sizeof(u64);
3242 if (!cntr || pos >= ret) {
3243 /* everything read, or couldn't get memory */
3244 ret = 0;
3245 goto done;
3246 }
3247 *cntrp = cntr;
3248 for (i = 0; i < dd->cspec->nportcntrs; i++) {
3249 if (portcntr7220indices[i] & _PORT_VIRT_FLAG)
3250 *cntr++ = qib_portcntr_7220(ppd,
3251 portcntr7220indices[i] &
3252 ~_PORT_VIRT_FLAG);
3253 else
3254 *cntr++ = read_7220_creg32(dd,
3255 portcntr7220indices[i]);
3256 }
3257 }
3258 done:
3259 return ret;
3260 }
3261
3262 /**
3263 * qib_get_7220_faststats - get word counters from chip before they overflow
3264 * @opaque - contains a pointer to the qlogic_ib device qib_devdata
3265 *
3266 * This needs more work; in particular, decision on whether we really
3267 * need traffic_wds done the way it is
3268 * called from add_timer
3269 */
3270 static void qib_get_7220_faststats(unsigned long opaque)
3271 {
3272 struct qib_devdata *dd = (struct qib_devdata *) opaque;
3273 struct qib_pportdata *ppd = dd->pport;
3274 unsigned long flags;
3275 u64 traffic_wds;
3276
3277 /*
3278 * don't access the chip while running diags, or memory diags can
3279 * fail
3280 */
3281 if (!(dd->flags & QIB_INITTED) || dd->diag_client)
3282 /* but re-arm the timer, for diags case; won't hurt other */
3283 goto done;
3284
3285 /*
3286 * We now try to maintain an activity timer, based on traffic
3287 * exceeding a threshold, so we need to check the word-counts
3288 * even if they are 64-bit.
3289 */
3290 traffic_wds = qib_portcntr_7220(ppd, cr_wordsend) +
3291 qib_portcntr_7220(ppd, cr_wordrcv);
3292 spin_lock_irqsave(&dd->eep_st_lock, flags);
3293 traffic_wds -= dd->traffic_wds;
3294 dd->traffic_wds += traffic_wds;
3295 if (traffic_wds >= QIB_TRAFFIC_ACTIVE_THRESHOLD)
3296 atomic_add(5, &dd->active_time); /* S/B #define */
3297 spin_unlock_irqrestore(&dd->eep_st_lock, flags);
3298 done:
3299 mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
3300 }
3301
3302 /*
3303 * If we are using MSI, try to fallback to INTx.
3304 */
3305 static int qib_7220_intr_fallback(struct qib_devdata *dd)
3306 {
3307 if (!dd->msi_lo)
3308 return 0;
3309
3310 qib_devinfo(dd->pcidev, "MSI interrupt not detected,"
3311 " trying INTx interrupts\n");
3312 qib_7220_free_irq(dd);
3313 qib_enable_intx(dd->pcidev);
3314 /*
3315 * Some newer kernels require free_irq before disable_msi,
3316 * and irq can be changed during disable and INTx enable
3317 * and we need to therefore use the pcidev->irq value,
3318 * not our saved MSI value.
3319 */
3320 dd->cspec->irq = dd->pcidev->irq;
3321 qib_setup_7220_interrupt(dd);
3322 return 1;
3323 }
3324
3325 /*
3326 * Reset the XGXS (between serdes and IBC). Slightly less intrusive
3327 * than resetting the IBC or external link state, and useful in some
3328 * cases to cause some retraining. To do this right, we reset IBC
3329 * as well.
3330 */
3331 static void qib_7220_xgxs_reset(struct qib_pportdata *ppd)
3332 {
3333 u64 val, prev_val;
3334 struct qib_devdata *dd = ppd->dd;
3335
3336 prev_val = qib_read_kreg64(dd, kr_xgxs_cfg);
3337 val = prev_val | QLOGIC_IB_XGXS_RESET;
3338 prev_val &= ~QLOGIC_IB_XGXS_RESET; /* be sure */
3339 qib_write_kreg(dd, kr_control,
3340 dd->control & ~QLOGIC_IB_C_LINKENABLE);
3341 qib_write_kreg(dd, kr_xgxs_cfg, val);
3342 qib_read_kreg32(dd, kr_scratch);
3343 qib_write_kreg(dd, kr_xgxs_cfg, prev_val);
3344 qib_write_kreg(dd, kr_control, dd->control);
3345 }
3346
3347 /*
3348 * For this chip, we want to use the same buffer every time
3349 * when we are trying to bring the link up (they are always VL15
3350 * packets). At that link state the packet should always go out immediately
3351 * (or at least be discarded at the tx interface if the link is down).
3352 * If it doesn't, and the buffer isn't available, that means some other
3353 * sender has gotten ahead of us, and is preventing our packet from going
3354 * out. In that case, we flush all packets, and try again. If that still
3355 * fails, we fail the request, and hope things work the next time around.
3356 *
3357 * We don't need very complicated heuristics on whether the packet had
3358 * time to go out or not, since even at SDR 1X, it goes out in very short
3359 * time periods, covered by the chip reads done here and as part of the
3360 * flush.
3361 */
3362 static u32 __iomem *get_7220_link_buf(struct qib_pportdata *ppd, u32 *bnum)
3363 {
3364 u32 __iomem *buf;
3365 u32 lbuf = ppd->dd->cspec->lastbuf_for_pio;
3366 int do_cleanup;
3367 unsigned long flags;
3368
3369 /*
3370 * always blip to get avail list updated, since it's almost
3371 * always needed, and is fairly cheap.
3372 */
3373 sendctrl_7220_mod(ppd->dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
3374 qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
3375 buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
3376 if (buf)
3377 goto done;
3378
3379 spin_lock_irqsave(&ppd->sdma_lock, flags);
3380 if (ppd->sdma_state.current_state == qib_sdma_state_s20_idle &&
3381 ppd->sdma_state.current_state != qib_sdma_state_s00_hw_down) {
3382 __qib_sdma_process_event(ppd, qib_sdma_event_e00_go_hw_down);
3383 do_cleanup = 0;
3384 } else {
3385 do_cleanup = 1;
3386 qib_7220_sdma_hw_clean_up(ppd);
3387 }
3388 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3389
3390 if (do_cleanup) {
3391 qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
3392 buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
3393 }
3394 done:
3395 return buf;
3396 }
3397
3398 /*
3399 * This code for non-IBTA-compliant IB speed negotiation is only known to
3400 * work for the SDR to DDR transition, and only between an HCA and a switch
3401 * with recent firmware. It is based on observed heuristics, rather than
3402 * actual knowledge of the non-compliant speed negotiation.
3403 * It has a number of hard-coded fields, since the hope is to rewrite this
3404 * when a spec is available on how the negoation is intended to work.
3405 */
3406 static void autoneg_7220_sendpkt(struct qib_pportdata *ppd, u32 *hdr,
3407 u32 dcnt, u32 *data)
3408 {
3409 int i;
3410 u64 pbc;
3411 u32 __iomem *piobuf;
3412 u32 pnum;
3413 struct qib_devdata *dd = ppd->dd;
3414
3415 i = 0;
3416 pbc = 7 + dcnt + 1; /* 7 dword header, dword data, icrc */
3417 pbc |= PBC_7220_VL15_SEND;
3418 while (!(piobuf = get_7220_link_buf(ppd, &pnum))) {
3419 if (i++ > 5)
3420 return;
3421 udelay(2);
3422 }
3423 sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_DISARM_BUF(pnum));
3424 writeq(pbc, piobuf);
3425 qib_flush_wc();
3426 qib_pio_copy(piobuf + 2, hdr, 7);
3427 qib_pio_copy(piobuf + 9, data, dcnt);
3428 if (dd->flags & QIB_USE_SPCL_TRIG) {
3429 u32 spcl_off = (pnum >= dd->piobcnt2k) ? 2047 : 1023;
3430
3431 qib_flush_wc();
3432 __raw_writel(0xaebecede, piobuf + spcl_off);
3433 }
3434 qib_flush_wc();
3435 qib_sendbuf_done(dd, pnum);
3436 }
3437
3438 /*
3439 * _start packet gets sent twice at start, _done gets sent twice at end
3440 */
3441 static void autoneg_7220_send(struct qib_pportdata *ppd, int which)
3442 {
3443 struct qib_devdata *dd = ppd->dd;
3444 static u32 swapped;
3445 u32 dw, i, hcnt, dcnt, *data;
3446 static u32 hdr[7] = { 0xf002ffff, 0x48ffff, 0x6400abba };
3447 static u32 madpayload_start[0x40] = {
3448 0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
3449 0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
3450 0x1, 0x1388, 0x15e, 0x1, /* rest 0's */
3451 };
3452 static u32 madpayload_done[0x40] = {
3453 0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
3454 0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
3455 0x40000001, 0x1388, 0x15e, /* rest 0's */
3456 };
3457
3458 dcnt = ARRAY_SIZE(madpayload_start);
3459 hcnt = ARRAY_SIZE(hdr);
3460 if (!swapped) {
3461 /* for maintainability, do it at runtime */
3462 for (i = 0; i < hcnt; i++) {
3463 dw = (__force u32) cpu_to_be32(hdr[i]);
3464 hdr[i] = dw;
3465 }
3466 for (i = 0; i < dcnt; i++) {
3467 dw = (__force u32) cpu_to_be32(madpayload_start[i]);
3468 madpayload_start[i] = dw;
3469 dw = (__force u32) cpu_to_be32(madpayload_done[i]);
3470 madpayload_done[i] = dw;
3471 }
3472 swapped = 1;
3473 }
3474
3475 data = which ? madpayload_done : madpayload_start;
3476
3477 autoneg_7220_sendpkt(ppd, hdr, dcnt, data);
3478 qib_read_kreg64(dd, kr_scratch);
3479 udelay(2);
3480 autoneg_7220_sendpkt(ppd, hdr, dcnt, data);
3481 qib_read_kreg64(dd, kr_scratch);
3482 udelay(2);
3483 }
3484
3485 /*
3486 * Do the absolute minimum to cause an IB speed change, and make it
3487 * ready, but don't actually trigger the change. The caller will
3488 * do that when ready (if link is in Polling training state, it will
3489 * happen immediately, otherwise when link next goes down)
3490 *
3491 * This routine should only be used as part of the DDR autonegotation
3492 * code for devices that are not compliant with IB 1.2 (or code that
3493 * fixes things up for same).
3494 *
3495 * When link has gone down, and autoneg enabled, or autoneg has
3496 * failed and we give up until next time we set both speeds, and
3497 * then we want IBTA enabled as well as "use max enabled speed.
3498 */
3499 static void set_7220_ibspeed_fast(struct qib_pportdata *ppd, u32 speed)
3500 {
3501 ppd->cpspec->ibcddrctrl &= ~(IBA7220_IBC_SPEED_AUTONEG_MASK |
3502 IBA7220_IBC_IBTA_1_2_MASK);
3503
3504 if (speed == (QIB_IB_SDR | QIB_IB_DDR))
3505 ppd->cpspec->ibcddrctrl |= IBA7220_IBC_SPEED_AUTONEG_MASK |
3506 IBA7220_IBC_IBTA_1_2_MASK;
3507 else
3508 ppd->cpspec->ibcddrctrl |= speed == QIB_IB_DDR ?
3509 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
3510
3511 qib_write_kreg(ppd->dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
3512 qib_write_kreg(ppd->dd, kr_scratch, 0);
3513 }
3514
3515 /*
3516 * This routine is only used when we are not talking to another
3517 * IB 1.2-compliant device that we think can do DDR.
3518 * (This includes all existing switch chips as of Oct 2007.)
3519 * 1.2-compliant devices go directly to DDR prior to reaching INIT
3520 */
3521 static void try_7220_autoneg(struct qib_pportdata *ppd)
3522 {
3523 unsigned long flags;
3524
3525 /*
3526 * Required for older non-IB1.2 DDR switches. Newer
3527 * non-IB-compliant switches don't need it, but so far,
3528 * aren't bothered by it either. "Magic constant"
3529 */
3530 qib_write_kreg(ppd->dd, kr_ncmodectrl, 0x3b9dc07);
3531
3532 spin_lock_irqsave(&ppd->lflags_lock, flags);
3533 ppd->lflags |= QIBL_IB_AUTONEG_INPROG;
3534 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3535 autoneg_7220_send(ppd, 0);
3536 set_7220_ibspeed_fast(ppd, QIB_IB_DDR);
3537
3538 toggle_7220_rclkrls(ppd->dd);
3539 /* 2 msec is minimum length of a poll cycle */
3540 queue_delayed_work(ib_wq, &ppd->cpspec->autoneg_work,
3541 msecs_to_jiffies(2));
3542 }
3543
3544 /*
3545 * Handle the empirically determined mechanism for auto-negotiation
3546 * of DDR speed with switches.
3547 */
3548 static void autoneg_7220_work(struct work_struct *work)
3549 {
3550 struct qib_pportdata *ppd;
3551 struct qib_devdata *dd;
3552 u64 startms;
3553 u32 i;
3554 unsigned long flags;
3555
3556 ppd = &container_of(work, struct qib_chippport_specific,
3557 autoneg_work.work)->pportdata;
3558 dd = ppd->dd;
3559
3560 startms = jiffies_to_msecs(jiffies);
3561
3562 /*
3563 * Busy wait for this first part, it should be at most a
3564 * few hundred usec, since we scheduled ourselves for 2msec.
3565 */
3566 for (i = 0; i < 25; i++) {
3567 if (SYM_FIELD(ppd->lastibcstat, IBCStatus, LinkTrainingState)
3568 == IB_7220_LT_STATE_POLLQUIET) {
3569 qib_set_linkstate(ppd, QIB_IB_LINKDOWN_DISABLE);
3570 break;
3571 }
3572 udelay(100);
3573 }
3574
3575 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
3576 goto done; /* we got there early or told to stop */
3577
3578 /* we expect this to timeout */
3579 if (wait_event_timeout(ppd->cpspec->autoneg_wait,
3580 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3581 msecs_to_jiffies(90)))
3582 goto done;
3583
3584 toggle_7220_rclkrls(dd);
3585
3586 /* we expect this to timeout */
3587 if (wait_event_timeout(ppd->cpspec->autoneg_wait,
3588 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3589 msecs_to_jiffies(1700)))
3590 goto done;
3591
3592 set_7220_ibspeed_fast(ppd, QIB_IB_SDR);
3593 toggle_7220_rclkrls(dd);
3594
3595 /*
3596 * Wait up to 250 msec for link to train and get to INIT at DDR;
3597 * this should terminate early.
3598 */
3599 wait_event_timeout(ppd->cpspec->autoneg_wait,
3600 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3601 msecs_to_jiffies(250));
3602 done:
3603 if (ppd->lflags & QIBL_IB_AUTONEG_INPROG) {
3604 spin_lock_irqsave(&ppd->lflags_lock, flags);
3605 ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
3606 if (dd->cspec->autoneg_tries == AUTONEG_TRIES) {
3607 ppd->lflags |= QIBL_IB_AUTONEG_FAILED;
3608 dd->cspec->autoneg_tries = 0;
3609 }
3610 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3611 set_7220_ibspeed_fast(ppd, ppd->link_speed_enabled);
3612 }
3613 }
3614
3615 static u32 qib_7220_iblink_state(u64 ibcs)
3616 {
3617 u32 state = (u32)SYM_FIELD(ibcs, IBCStatus, LinkState);
3618
3619 switch (state) {
3620 case IB_7220_L_STATE_INIT:
3621 state = IB_PORT_INIT;
3622 break;
3623 case IB_7220_L_STATE_ARM:
3624 state = IB_PORT_ARMED;
3625 break;
3626 case IB_7220_L_STATE_ACTIVE:
3627 /* fall through */
3628 case IB_7220_L_STATE_ACT_DEFER:
3629 state = IB_PORT_ACTIVE;
3630 break;
3631 default: /* fall through */
3632 case IB_7220_L_STATE_DOWN:
3633 state = IB_PORT_DOWN;
3634 break;
3635 }
3636 return state;
3637 }
3638
3639 /* returns the IBTA port state, rather than the IBC link training state */
3640 static u8 qib_7220_phys_portstate(u64 ibcs)
3641 {
3642 u8 state = (u8)SYM_FIELD(ibcs, IBCStatus, LinkTrainingState);
3643 return qib_7220_physportstate[state];
3644 }
3645
3646 static int qib_7220_ib_updown(struct qib_pportdata *ppd, int ibup, u64 ibcs)
3647 {
3648 int ret = 0, symadj = 0;
3649 struct qib_devdata *dd = ppd->dd;
3650 unsigned long flags;
3651
3652 spin_lock_irqsave(&ppd->lflags_lock, flags);
3653 ppd->lflags &= ~QIBL_IB_FORCE_NOTIFY;
3654 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3655
3656 if (!ibup) {
3657 /*
3658 * When the link goes down we don't want AEQ running, so it
3659 * won't interfere with IBC training, etc., and we need
3660 * to go back to the static SerDes preset values.
3661 */
3662 if (!(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
3663 QIBL_IB_AUTONEG_INPROG)))
3664 set_7220_ibspeed_fast(ppd, ppd->link_speed_enabled);
3665 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
3666 qib_sd7220_presets(dd);
3667 qib_cancel_sends(ppd); /* initial disarm, etc. */
3668 spin_lock_irqsave(&ppd->sdma_lock, flags);
3669 if (__qib_sdma_running(ppd))
3670 __qib_sdma_process_event(ppd,
3671 qib_sdma_event_e70_go_idle);
3672 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3673 }
3674 /* this might better in qib_sd7220_presets() */
3675 set_7220_relock_poll(dd, ibup);
3676 } else {
3677 if (qib_compat_ddr_negotiate &&
3678 !(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
3679 QIBL_IB_AUTONEG_INPROG)) &&
3680 ppd->link_speed_active == QIB_IB_SDR &&
3681 (ppd->link_speed_enabled & (QIB_IB_DDR | QIB_IB_SDR)) ==
3682 (QIB_IB_DDR | QIB_IB_SDR) &&
3683 dd->cspec->autoneg_tries < AUTONEG_TRIES) {
3684 /* we are SDR, and DDR auto-negotiation enabled */
3685 ++dd->cspec->autoneg_tries;
3686 if (!ppd->cpspec->ibdeltainprog) {
3687 ppd->cpspec->ibdeltainprog = 1;
3688 ppd->cpspec->ibsymsnap = read_7220_creg32(dd,
3689 cr_ibsymbolerr);
3690 ppd->cpspec->iblnkerrsnap = read_7220_creg32(dd,
3691 cr_iblinkerrrecov);
3692 }
3693 try_7220_autoneg(ppd);
3694 ret = 1; /* no other IB status change processing */
3695 } else if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
3696 ppd->link_speed_active == QIB_IB_SDR) {
3697 autoneg_7220_send(ppd, 1);
3698 set_7220_ibspeed_fast(ppd, QIB_IB_DDR);
3699 udelay(2);
3700 toggle_7220_rclkrls(dd);
3701 ret = 1; /* no other IB status change processing */
3702 } else {
3703 if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
3704 (ppd->link_speed_active & QIB_IB_DDR)) {
3705 spin_lock_irqsave(&ppd->lflags_lock, flags);
3706 ppd->lflags &= ~(QIBL_IB_AUTONEG_INPROG |
3707 QIBL_IB_AUTONEG_FAILED);
3708 spin_unlock_irqrestore(&ppd->lflags_lock,
3709 flags);
3710 dd->cspec->autoneg_tries = 0;
3711 /* re-enable SDR, for next link down */
3712 set_7220_ibspeed_fast(ppd,
3713 ppd->link_speed_enabled);
3714 wake_up(&ppd->cpspec->autoneg_wait);
3715 symadj = 1;
3716 } else if (ppd->lflags & QIBL_IB_AUTONEG_FAILED) {
3717 /*
3718 * Clear autoneg failure flag, and do setup
3719 * so we'll try next time link goes down and
3720 * back to INIT (possibly connected to a
3721 * different device).
3722 */
3723 spin_lock_irqsave(&ppd->lflags_lock, flags);
3724 ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
3725 spin_unlock_irqrestore(&ppd->lflags_lock,
3726 flags);
3727 ppd->cpspec->ibcddrctrl |=
3728 IBA7220_IBC_IBTA_1_2_MASK;
3729 qib_write_kreg(dd, kr_ncmodectrl, 0);
3730 symadj = 1;
3731 }
3732 }
3733
3734 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
3735 symadj = 1;
3736
3737 if (!ret) {
3738 ppd->delay_mult = rate_to_delay
3739 [(ibcs >> IBA7220_LINKSPEED_SHIFT) & 1]
3740 [(ibcs >> IBA7220_LINKWIDTH_SHIFT) & 1];
3741
3742 set_7220_relock_poll(dd, ibup);
3743 spin_lock_irqsave(&ppd->sdma_lock, flags);
3744 /*
3745 * Unlike 7322, the 7220 needs this, due to lack of
3746 * interrupt in some cases when we have sdma active
3747 * when the link goes down.
3748 */
3749 if (ppd->sdma_state.current_state !=
3750 qib_sdma_state_s20_idle)
3751 __qib_sdma_process_event(ppd,
3752 qib_sdma_event_e00_go_hw_down);
3753 spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3754 }
3755 }
3756
3757 if (symadj) {
3758 if (ppd->cpspec->ibdeltainprog) {
3759 ppd->cpspec->ibdeltainprog = 0;
3760 ppd->cpspec->ibsymdelta += read_7220_creg32(ppd->dd,
3761 cr_ibsymbolerr) - ppd->cpspec->ibsymsnap;
3762 ppd->cpspec->iblnkerrdelta += read_7220_creg32(ppd->dd,
3763 cr_iblinkerrrecov) - ppd->cpspec->iblnkerrsnap;
3764 }
3765 } else if (!ibup && qib_compat_ddr_negotiate &&
3766 !ppd->cpspec->ibdeltainprog &&
3767 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
3768 ppd->cpspec->ibdeltainprog = 1;
3769 ppd->cpspec->ibsymsnap = read_7220_creg32(ppd->dd,
3770 cr_ibsymbolerr);
3771 ppd->cpspec->iblnkerrsnap = read_7220_creg32(ppd->dd,
3772 cr_iblinkerrrecov);
3773 }
3774
3775 if (!ret)
3776 qib_setup_7220_setextled(ppd, ibup);
3777 return ret;
3778 }
3779
3780 /*
3781 * Does read/modify/write to appropriate registers to
3782 * set output and direction bits selected by mask.
3783 * these are in their canonical postions (e.g. lsb of
3784 * dir will end up in D48 of extctrl on existing chips).
3785 * returns contents of GP Inputs.
3786 */
3787 static int gpio_7220_mod(struct qib_devdata *dd, u32 out, u32 dir, u32 mask)
3788 {
3789 u64 read_val, new_out;
3790 unsigned long flags;
3791
3792 if (mask) {
3793 /* some bits being written, lock access to GPIO */
3794 dir &= mask;
3795 out &= mask;
3796 spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
3797 dd->cspec->extctrl &= ~((u64)mask << SYM_LSB(EXTCtrl, GPIOOe));
3798 dd->cspec->extctrl |= ((u64) dir << SYM_LSB(EXTCtrl, GPIOOe));
3799 new_out = (dd->cspec->gpio_out & ~mask) | out;
3800
3801 qib_write_kreg(dd, kr_extctrl, dd->cspec->extctrl);
3802 qib_write_kreg(dd, kr_gpio_out, new_out);
3803 dd->cspec->gpio_out = new_out;
3804 spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
3805 }
3806 /*
3807 * It is unlikely that a read at this time would get valid
3808 * data on a pin whose direction line was set in the same
3809 * call to this function. We include the read here because
3810 * that allows us to potentially combine a change on one pin with
3811 * a read on another, and because the old code did something like
3812 * this.
3813 */
3814 read_val = qib_read_kreg64(dd, kr_extstatus);
3815 return SYM_FIELD(read_val, EXTStatus, GPIOIn);
3816 }
3817
3818 /*
3819 * Read fundamental info we need to use the chip. These are
3820 * the registers that describe chip capabilities, and are
3821 * saved in shadow registers.
3822 */
3823 static void get_7220_chip_params(struct qib_devdata *dd)
3824 {
3825 u64 val;
3826 u32 piobufs;
3827 int mtu;
3828
3829 dd->uregbase = qib_read_kreg32(dd, kr_userregbase);
3830
3831 dd->rcvtidcnt = qib_read_kreg32(dd, kr_rcvtidcnt);
3832 dd->rcvtidbase = qib_read_kreg32(dd, kr_rcvtidbase);
3833 dd->rcvegrbase = qib_read_kreg32(dd, kr_rcvegrbase);
3834 dd->palign = qib_read_kreg32(dd, kr_palign);
3835 dd->piobufbase = qib_read_kreg64(dd, kr_sendpiobufbase);
3836 dd->pio2k_bufbase = dd->piobufbase & 0xffffffff;
3837
3838 val = qib_read_kreg64(dd, kr_sendpiosize);
3839 dd->piosize2k = val & ~0U;
3840 dd->piosize4k = val >> 32;
3841
3842 mtu = ib_mtu_enum_to_int(qib_ibmtu);
3843 if (mtu == -1)
3844 mtu = QIB_DEFAULT_MTU;
3845 dd->pport->ibmtu = (u32)mtu;
3846
3847 val = qib_read_kreg64(dd, kr_sendpiobufcnt);
3848 dd->piobcnt2k = val & ~0U;
3849 dd->piobcnt4k = val >> 32;
3850 /* these may be adjusted in init_chip_wc_pat() */
3851 dd->pio2kbase = (u32 __iomem *)
3852 ((char __iomem *) dd->kregbase + dd->pio2k_bufbase);
3853 if (dd->piobcnt4k) {
3854 dd->pio4kbase = (u32 __iomem *)
3855 ((char __iomem *) dd->kregbase +
3856 (dd->piobufbase >> 32));
3857 /*
3858 * 4K buffers take 2 pages; we use roundup just to be
3859 * paranoid; we calculate it once here, rather than on
3860 * ever buf allocate
3861 */
3862 dd->align4k = ALIGN(dd->piosize4k, dd->palign);
3863 }
3864
3865 piobufs = dd->piobcnt4k + dd->piobcnt2k;
3866
3867 dd->pioavregs = ALIGN(piobufs, sizeof(u64) * BITS_PER_BYTE / 2) /
3868 (sizeof(u64) * BITS_PER_BYTE / 2);
3869 }
3870
3871 /*
3872 * The chip base addresses in cspec and cpspec have to be set
3873 * after possible init_chip_wc_pat(), rather than in
3874 * qib_get_7220_chip_params(), so split out as separate function
3875 */
3876 static void set_7220_baseaddrs(struct qib_devdata *dd)
3877 {
3878 u32 cregbase;
3879 /* init after possible re-map in init_chip_wc_pat() */
3880 cregbase = qib_read_kreg32(dd, kr_counterregbase);
3881 dd->cspec->cregbase = (u64 __iomem *)
3882 ((char __iomem *) dd->kregbase + cregbase);
3883
3884 dd->egrtidbase = (u64 __iomem *)
3885 ((char __iomem *) dd->kregbase + dd->rcvegrbase);
3886 }
3887
3888
3889 #define SENDCTRL_SHADOWED (SYM_MASK(SendCtrl, SendIntBufAvail) | \
3890 SYM_MASK(SendCtrl, SPioEnable) | \
3891 SYM_MASK(SendCtrl, SSpecialTriggerEn) | \
3892 SYM_MASK(SendCtrl, SendBufAvailUpd) | \
3893 SYM_MASK(SendCtrl, AvailUpdThld) | \
3894 SYM_MASK(SendCtrl, SDmaEnable) | \
3895 SYM_MASK(SendCtrl, SDmaIntEnable) | \
3896 SYM_MASK(SendCtrl, SDmaHalt) | \
3897 SYM_MASK(SendCtrl, SDmaSingleDescriptor))
3898
3899 static int sendctrl_hook(struct qib_devdata *dd,
3900 const struct diag_observer *op,
3901 u32 offs, u64 *data, u64 mask, int only_32)
3902 {
3903 unsigned long flags;
3904 unsigned idx = offs / sizeof(u64);
3905 u64 local_data, all_bits;
3906
3907 if (idx != kr_sendctrl) {
3908 qib_dev_err(dd, "SendCtrl Hook called with offs %X, %s-bit\n",
3909 offs, only_32 ? "32" : "64");
3910 return 0;
3911 }
3912
3913 all_bits = ~0ULL;
3914 if (only_32)
3915 all_bits >>= 32;
3916 spin_lock_irqsave(&dd->sendctrl_lock, flags);
3917 if ((mask & all_bits) != all_bits) {
3918 /*
3919 * At least some mask bits are zero, so we need
3920 * to read. The judgement call is whether from
3921 * reg or shadow. First-cut: read reg, and complain
3922 * if any bits which should be shadowed are different
3923 * from their shadowed value.
3924 */
3925 if (only_32)
3926 local_data = (u64)qib_read_kreg32(dd, idx);
3927 else
3928 local_data = qib_read_kreg64(dd, idx);
3929 qib_dev_err(dd, "Sendctrl -> %X, Shad -> %X\n",
3930 (u32)local_data, (u32)dd->sendctrl);
3931 if ((local_data & SENDCTRL_SHADOWED) !=
3932 (dd->sendctrl & SENDCTRL_SHADOWED))
3933 qib_dev_err(dd, "Sendctrl read: %X shadow is %X\n",
3934 (u32)local_data, (u32) dd->sendctrl);
3935 *data = (local_data & ~mask) | (*data & mask);
3936 }
3937 if (mask) {
3938 /*
3939 * At least some mask bits are one, so we need
3940 * to write, but only shadow some bits.
3941 */
3942 u64 sval, tval; /* Shadowed, transient */
3943
3944 /*
3945 * New shadow val is bits we don't want to touch,
3946 * ORed with bits we do, that are intended for shadow.
3947 */
3948 sval = (dd->sendctrl & ~mask);
3949 sval |= *data & SENDCTRL_SHADOWED & mask;
3950 dd->sendctrl = sval;
3951 tval = sval | (*data & ~SENDCTRL_SHADOWED & mask);
3952 qib_dev_err(dd, "Sendctrl <- %X, Shad <- %X\n",
3953 (u32)tval, (u32)sval);
3954 qib_write_kreg(dd, kr_sendctrl, tval);
3955 qib_write_kreg(dd, kr_scratch, 0Ull);
3956 }
3957 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
3958
3959 return only_32 ? 4 : 8;
3960 }
3961
3962 static const struct diag_observer sendctrl_observer = {
3963 sendctrl_hook, kr_sendctrl * sizeof(u64),
3964 kr_sendctrl * sizeof(u64)
3965 };
3966
3967 /*
3968 * write the final few registers that depend on some of the
3969 * init setup. Done late in init, just before bringing up
3970 * the serdes.
3971 */
3972 static int qib_late_7220_initreg(struct qib_devdata *dd)
3973 {
3974 int ret = 0;
3975 u64 val;
3976
3977 qib_write_kreg(dd, kr_rcvhdrentsize, dd->rcvhdrentsize);
3978 qib_write_kreg(dd, kr_rcvhdrsize, dd->rcvhdrsize);
3979 qib_write_kreg(dd, kr_rcvhdrcnt, dd->rcvhdrcnt);
3980 qib_write_kreg(dd, kr_sendpioavailaddr, dd->pioavailregs_phys);
3981 val = qib_read_kreg64(dd, kr_sendpioavailaddr);
3982 if (val != dd->pioavailregs_phys) {
3983 qib_dev_err(dd, "Catastrophic software error, "
3984 "SendPIOAvailAddr written as %lx, "
3985 "read back as %llx\n",
3986 (unsigned long) dd->pioavailregs_phys,
3987 (unsigned long long) val);
3988 ret = -EINVAL;
3989 }
3990 qib_register_observer(dd, &sendctrl_observer);
3991 return ret;
3992 }
3993
3994 static int qib_init_7220_variables(struct qib_devdata *dd)
3995 {
3996 struct qib_chippport_specific *cpspec;
3997 struct qib_pportdata *ppd;
3998 int ret = 0;
3999 u32 sbufs, updthresh;
4000
4001 cpspec = (struct qib_chippport_specific *)(dd + 1);
4002 ppd = &cpspec->pportdata;
4003 dd->pport = ppd;
4004 dd->num_pports = 1;
4005
4006 dd->cspec = (struct qib_chip_specific *)(cpspec + dd->num_pports);
4007 ppd->cpspec = cpspec;
4008
4009 spin_lock_init(&dd->cspec->sdepb_lock);
4010 spin_lock_init(&dd->cspec->rcvmod_lock);
4011 spin_lock_init(&dd->cspec->gpio_lock);
4012
4013 /* we haven't yet set QIB_PRESENT, so use read directly */
4014 dd->revision = readq(&dd->kregbase[kr_revision]);
4015
4016 if ((dd->revision & 0xffffffffU) == 0xffffffffU) {
4017 qib_dev_err(dd, "Revision register read failure, "
4018 "giving up initialization\n");
4019 ret = -ENODEV;
4020 goto bail;
4021 }
4022 dd->flags |= QIB_PRESENT; /* now register routines work */
4023
4024 dd->majrev = (u8) SYM_FIELD(dd->revision, Revision_R,
4025 ChipRevMajor);
4026 dd->minrev = (u8) SYM_FIELD(dd->revision, Revision_R,
4027 ChipRevMinor);
4028
4029 get_7220_chip_params(dd);
4030 qib_7220_boardname(dd);
4031
4032 /*
4033 * GPIO bits for TWSI data and clock,
4034 * used for serial EEPROM.
4035 */
4036 dd->gpio_sda_num = _QIB_GPIO_SDA_NUM;
4037 dd->gpio_scl_num = _QIB_GPIO_SCL_NUM;
4038 dd->twsi_eeprom_dev = QIB_TWSI_EEPROM_DEV;
4039
4040 dd->flags |= QIB_HAS_INTX | QIB_HAS_LINK_LATENCY |
4041 QIB_NODMA_RTAIL | QIB_HAS_THRESH_UPDATE;
4042 dd->flags |= qib_special_trigger ?
4043 QIB_USE_SPCL_TRIG : QIB_HAS_SEND_DMA;
4044
4045 /*
4046 * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
4047 * 2 is Some Misc, 3 is reserved for future.
4048 */
4049 dd->eep_st_masks[0].hwerrs_to_log = HWE_MASK(TXEMemParityErr);
4050
4051 dd->eep_st_masks[1].hwerrs_to_log = HWE_MASK(RXEMemParityErr);
4052
4053 dd->eep_st_masks[2].errs_to_log = ERR_MASK(ResetNegated);
4054
4055 init_waitqueue_head(&cpspec->autoneg_wait);
4056 INIT_DELAYED_WORK(&cpspec->autoneg_work, autoneg_7220_work);
4057
4058 qib_init_pportdata(ppd, dd, 0, 1);
4059 ppd->link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
4060 ppd->link_speed_supported = QIB_IB_SDR | QIB_IB_DDR;
4061
4062 ppd->link_width_enabled = ppd->link_width_supported;
4063 ppd->link_speed_enabled = ppd->link_speed_supported;
4064 /*
4065 * Set the initial values to reasonable default, will be set
4066 * for real when link is up.
4067 */
4068 ppd->link_width_active = IB_WIDTH_4X;
4069 ppd->link_speed_active = QIB_IB_SDR;
4070 ppd->delay_mult = rate_to_delay[0][1];
4071 ppd->vls_supported = IB_VL_VL0;
4072 ppd->vls_operational = ppd->vls_supported;
4073
4074 if (!qib_mini_init)
4075 qib_write_kreg(dd, kr_rcvbthqp, QIB_KD_QP);
4076
4077 init_timer(&ppd->cpspec->chase_timer);
4078 ppd->cpspec->chase_timer.function = reenable_7220_chase;
4079 ppd->cpspec->chase_timer.data = (unsigned long)ppd;
4080
4081 qib_num_cfg_vls = 1; /* if any 7220's, only one VL */
4082
4083 dd->rcvhdrentsize = QIB_RCVHDR_ENTSIZE;
4084 dd->rcvhdrsize = QIB_DFLT_RCVHDRSIZE;
4085 dd->rhf_offset =
4086 dd->rcvhdrentsize - sizeof(u64) / sizeof(u32);
4087
4088 /* we always allocate at least 2048 bytes for eager buffers */
4089 ret = ib_mtu_enum_to_int(qib_ibmtu);
4090 dd->rcvegrbufsize = ret != -1 ? max(ret, 2048) : QIB_DEFAULT_MTU;
4091 BUG_ON(!is_power_of_2(dd->rcvegrbufsize));
4092 dd->rcvegrbufsize_shift = ilog2(dd->rcvegrbufsize);
4093
4094 qib_7220_tidtemplate(dd);
4095
4096 /*
4097 * We can request a receive interrupt for 1 or
4098 * more packets from current offset. For now, we set this
4099 * up for a single packet.
4100 */
4101 dd->rhdrhead_intr_off = 1ULL << 32;
4102
4103 /* setup the stats timer; the add_timer is done at end of init */
4104 init_timer(&dd->stats_timer);
4105 dd->stats_timer.function = qib_get_7220_faststats;
4106 dd->stats_timer.data = (unsigned long) dd;
4107 dd->stats_timer.expires = jiffies + ACTIVITY_TIMER * HZ;
4108
4109 /*
4110 * Control[4] has been added to change the arbitration within
4111 * the SDMA engine between favoring data fetches over descriptor
4112 * fetches. qib_sdma_fetch_arb==0 gives data fetches priority.
4113 */
4114 if (qib_sdma_fetch_arb)
4115 dd->control |= 1 << 4;
4116
4117 dd->ureg_align = 0x10000; /* 64KB alignment */
4118
4119 dd->piosize2kmax_dwords = (dd->piosize2k >> 2)-1;
4120 qib_7220_config_ctxts(dd);
4121 qib_set_ctxtcnt(dd); /* needed for PAT setup */
4122
4123 if (qib_wc_pat) {
4124 ret = init_chip_wc_pat(dd, 0);
4125 if (ret)
4126 goto bail;
4127 }
4128 set_7220_baseaddrs(dd); /* set chip access pointers now */
4129
4130 ret = 0;
4131 if (qib_mini_init)
4132 goto bail;
4133
4134 ret = qib_create_ctxts(dd);
4135 init_7220_cntrnames(dd);
4136
4137 /* use all of 4KB buffers for the kernel SDMA, zero if !SDMA.
4138 * reserve the update threshold amount for other kernel use, such
4139 * as sending SMI, MAD, and ACKs, or 3, whichever is greater,
4140 * unless we aren't enabling SDMA, in which case we want to use
4141 * all the 4k bufs for the kernel.
4142 * if this was less than the update threshold, we could wait
4143 * a long time for an update. Coded this way because we
4144 * sometimes change the update threshold for various reasons,
4145 * and we want this to remain robust.
4146 */
4147 updthresh = 8U; /* update threshold */
4148 if (dd->flags & QIB_HAS_SEND_DMA) {
4149 dd->cspec->sdmabufcnt = dd->piobcnt4k;
4150 sbufs = updthresh > 3 ? updthresh : 3;
4151 } else {
4152 dd->cspec->sdmabufcnt = 0;
4153 sbufs = dd->piobcnt4k;
4154 }
4155
4156 dd->cspec->lastbuf_for_pio = dd->piobcnt2k + dd->piobcnt4k -
4157 dd->cspec->sdmabufcnt;
4158 dd->lastctxt_piobuf = dd->cspec->lastbuf_for_pio - sbufs;
4159 dd->cspec->lastbuf_for_pio--; /* range is <= , not < */
4160 dd->pbufsctxt = dd->lastctxt_piobuf /
4161 (dd->cfgctxts - dd->first_user_ctxt);
4162
4163 /*
4164 * if we are at 16 user contexts, we will have one 7 sbufs
4165 * per context, so drop the update threshold to match. We
4166 * want to update before we actually run out, at low pbufs/ctxt
4167 * so give ourselves some margin
4168 */
4169 if ((dd->pbufsctxt - 2) < updthresh)
4170 updthresh = dd->pbufsctxt - 2;
4171
4172 dd->cspec->updthresh_dflt = updthresh;
4173 dd->cspec->updthresh = updthresh;
4174
4175 /* before full enable, no interrupts, no locking needed */
4176 dd->sendctrl |= (updthresh & SYM_RMASK(SendCtrl, AvailUpdThld))
4177 << SYM_LSB(SendCtrl, AvailUpdThld);
4178
4179 dd->psxmitwait_supported = 1;
4180 dd->psxmitwait_check_rate = QIB_7220_PSXMITWAIT_CHECK_RATE;
4181 bail:
4182 return ret;
4183 }
4184
4185 static u32 __iomem *qib_7220_getsendbuf(struct qib_pportdata *ppd, u64 pbc,
4186 u32 *pbufnum)
4187 {
4188 u32 first, last, plen = pbc & QIB_PBC_LENGTH_MASK;
4189 struct qib_devdata *dd = ppd->dd;
4190 u32 __iomem *buf;
4191
4192 if (((pbc >> 32) & PBC_7220_VL15_SEND_CTRL) &&
4193 !(ppd->lflags & (QIBL_IB_AUTONEG_INPROG | QIBL_LINKACTIVE)))
4194 buf = get_7220_link_buf(ppd, pbufnum);
4195 else {
4196 if ((plen + 1) > dd->piosize2kmax_dwords)
4197 first = dd->piobcnt2k;
4198 else
4199 first = 0;
4200 /* try 4k if all 2k busy, so same last for both sizes */
4201 last = dd->cspec->lastbuf_for_pio;
4202 buf = qib_getsendbuf_range(dd, pbufnum, first, last);
4203 }
4204 return buf;
4205 }
4206
4207 /* these 2 "counters" are really control registers, and are always RW */
4208 static void qib_set_cntr_7220_sample(struct qib_pportdata *ppd, u32 intv,
4209 u32 start)
4210 {
4211 write_7220_creg(ppd->dd, cr_psinterval, intv);
4212 write_7220_creg(ppd->dd, cr_psstart, start);
4213 }
4214
4215 /*
4216 * NOTE: no real attempt is made to generalize the SDMA stuff.
4217 * At some point "soon" we will have a new more generalized
4218 * set of sdma interface, and then we'll clean this up.
4219 */
4220
4221 /* Must be called with sdma_lock held, or before init finished */
4222 static void qib_sdma_update_7220_tail(struct qib_pportdata *ppd, u16 tail)
4223 {
4224 /* Commit writes to memory and advance the tail on the chip */
4225 wmb();
4226 ppd->sdma_descq_tail = tail;
4227 qib_write_kreg(ppd->dd, kr_senddmatail, tail);
4228 }
4229
4230 static void qib_sdma_set_7220_desc_cnt(struct qib_pportdata *ppd, unsigned cnt)
4231 {
4232 }
4233
4234 static struct sdma_set_state_action sdma_7220_action_table[] = {
4235 [qib_sdma_state_s00_hw_down] = {
4236 .op_enable = 0,
4237 .op_intenable = 0,
4238 .op_halt = 0,
4239 .go_s99_running_tofalse = 1,
4240 },
4241 [qib_sdma_state_s10_hw_start_up_wait] = {
4242 .op_enable = 1,
4243 .op_intenable = 1,
4244 .op_halt = 1,
4245 },
4246 [qib_sdma_state_s20_idle] = {
4247 .op_enable = 1,
4248 .op_intenable = 1,
4249 .op_halt = 1,
4250 },
4251 [qib_sdma_state_s30_sw_clean_up_wait] = {
4252 .op_enable = 0,
4253 .op_intenable = 1,
4254 .op_halt = 0,
4255 },
4256 [qib_sdma_state_s40_hw_clean_up_wait] = {
4257 .op_enable = 1,
4258 .op_intenable = 1,
4259 .op_halt = 1,
4260 },
4261 [qib_sdma_state_s50_hw_halt_wait] = {
4262 .op_enable = 1,
4263 .op_intenable = 1,
4264 .op_halt = 1,
4265 },
4266 [qib_sdma_state_s99_running] = {
4267 .op_enable = 1,
4268 .op_intenable = 1,
4269 .op_halt = 0,
4270 .go_s99_running_totrue = 1,
4271 },
4272 };
4273
4274 static void qib_7220_sdma_init_early(struct qib_pportdata *ppd)
4275 {
4276 ppd->sdma_state.set_state_action = sdma_7220_action_table;
4277 }
4278
4279 static int init_sdma_7220_regs(struct qib_pportdata *ppd)
4280 {
4281 struct qib_devdata *dd = ppd->dd;
4282 unsigned i, n;
4283 u64 senddmabufmask[3] = { 0 };
4284
4285 /* Set SendDmaBase */
4286 qib_write_kreg(dd, kr_senddmabase, ppd->sdma_descq_phys);
4287 qib_sdma_7220_setlengen(ppd);
4288 qib_sdma_update_7220_tail(ppd, 0); /* Set SendDmaTail */
4289 /* Set SendDmaHeadAddr */
4290 qib_write_kreg(dd, kr_senddmaheadaddr, ppd->sdma_head_phys);
4291
4292 /*
4293 * Reserve all the former "kernel" piobufs, using high number range
4294 * so we get as many 4K buffers as possible
4295 */
4296 n = dd->piobcnt2k + dd->piobcnt4k;
4297 i = n - dd->cspec->sdmabufcnt;
4298
4299 for (; i < n; ++i) {
4300 unsigned word = i / 64;
4301 unsigned bit = i & 63;
4302
4303 BUG_ON(word >= 3);
4304 senddmabufmask[word] |= 1ULL << bit;
4305 }
4306 qib_write_kreg(dd, kr_senddmabufmask0, senddmabufmask[0]);
4307 qib_write_kreg(dd, kr_senddmabufmask1, senddmabufmask[1]);
4308 qib_write_kreg(dd, kr_senddmabufmask2, senddmabufmask[2]);
4309
4310 ppd->sdma_state.first_sendbuf = i;
4311 ppd->sdma_state.last_sendbuf = n;
4312
4313 return 0;
4314 }
4315
4316 /* sdma_lock must be held */
4317 static u16 qib_sdma_7220_gethead(struct qib_pportdata *ppd)
4318 {
4319 struct qib_devdata *dd = ppd->dd;
4320 int sane;
4321 int use_dmahead;
4322 u16 swhead;
4323 u16 swtail;
4324 u16 cnt;
4325 u16 hwhead;
4326
4327 use_dmahead = __qib_sdma_running(ppd) &&
4328 (dd->flags & QIB_HAS_SDMA_TIMEOUT);
4329 retry:
4330 hwhead = use_dmahead ?
4331 (u16)le64_to_cpu(*ppd->sdma_head_dma) :
4332 (u16)qib_read_kreg32(dd, kr_senddmahead);
4333
4334 swhead = ppd->sdma_descq_head;
4335 swtail = ppd->sdma_descq_tail;
4336 cnt = ppd->sdma_descq_cnt;
4337
4338 if (swhead < swtail) {
4339 /* not wrapped */
4340 sane = (hwhead >= swhead) & (hwhead <= swtail);
4341 } else if (swhead > swtail) {
4342 /* wrapped around */
4343 sane = ((hwhead >= swhead) && (hwhead < cnt)) ||
4344 (hwhead <= swtail);
4345 } else {
4346 /* empty */
4347 sane = (hwhead == swhead);
4348 }
4349
4350 if (unlikely(!sane)) {
4351 if (use_dmahead) {
4352 /* try one more time, directly from the register */
4353 use_dmahead = 0;
4354 goto retry;
4355 }
4356 /* assume no progress */
4357 hwhead = swhead;
4358 }
4359
4360 return hwhead;
4361 }
4362
4363 static int qib_sdma_7220_busy(struct qib_pportdata *ppd)
4364 {
4365 u64 hwstatus = qib_read_kreg64(ppd->dd, kr_senddmastatus);
4366
4367 return (hwstatus & SYM_MASK(SendDmaStatus, ScoreBoardDrainInProg)) ||
4368 (hwstatus & SYM_MASK(SendDmaStatus, AbortInProg)) ||
4369 (hwstatus & SYM_MASK(SendDmaStatus, InternalSDmaEnable)) ||
4370 !(hwstatus & SYM_MASK(SendDmaStatus, ScbEmpty));
4371 }
4372
4373 /*
4374 * Compute the amount of delay before sending the next packet if the
4375 * port's send rate differs from the static rate set for the QP.
4376 * Since the delay affects this packet but the amount of the delay is
4377 * based on the length of the previous packet, use the last delay computed
4378 * and save the delay count for this packet to be used next time
4379 * we get here.
4380 */
4381 static u32 qib_7220_setpbc_control(struct qib_pportdata *ppd, u32 plen,
4382 u8 srate, u8 vl)
4383 {
4384 u8 snd_mult = ppd->delay_mult;
4385 u8 rcv_mult = ib_rate_to_delay[srate];
4386 u32 ret = ppd->cpspec->last_delay_mult;
4387
4388 ppd->cpspec->last_delay_mult = (rcv_mult > snd_mult) ?
4389 (plen * (rcv_mult - snd_mult) + 1) >> 1 : 0;
4390
4391 /* Indicate VL15, if necessary */
4392 if (vl == 15)
4393 ret |= PBC_7220_VL15_SEND_CTRL;
4394 return ret;
4395 }
4396
4397 static void qib_7220_initvl15_bufs(struct qib_devdata *dd)
4398 {
4399 }
4400
4401 static void qib_7220_init_ctxt(struct qib_ctxtdata *rcd)
4402 {
4403 if (!rcd->ctxt) {
4404 rcd->rcvegrcnt = IBA7220_KRCVEGRCNT;
4405 rcd->rcvegr_tid_base = 0;
4406 } else {
4407 rcd->rcvegrcnt = rcd->dd->cspec->rcvegrcnt;
4408 rcd->rcvegr_tid_base = IBA7220_KRCVEGRCNT +
4409 (rcd->ctxt - 1) * rcd->rcvegrcnt;
4410 }
4411 }
4412
4413 static void qib_7220_txchk_change(struct qib_devdata *dd, u32 start,
4414 u32 len, u32 which, struct qib_ctxtdata *rcd)
4415 {
4416 int i;
4417 unsigned long flags;
4418
4419 switch (which) {
4420 case TXCHK_CHG_TYPE_KERN:
4421 /* see if we need to raise avail update threshold */
4422 spin_lock_irqsave(&dd->uctxt_lock, flags);
4423 for (i = dd->first_user_ctxt;
4424 dd->cspec->updthresh != dd->cspec->updthresh_dflt
4425 && i < dd->cfgctxts; i++)
4426 if (dd->rcd[i] && dd->rcd[i]->subctxt_cnt &&
4427 ((dd->rcd[i]->piocnt / dd->rcd[i]->subctxt_cnt) - 1)
4428 < dd->cspec->updthresh_dflt)
4429 break;
4430 spin_unlock_irqrestore(&dd->uctxt_lock, flags);
4431 if (i == dd->cfgctxts) {
4432 spin_lock_irqsave(&dd->sendctrl_lock, flags);
4433 dd->cspec->updthresh = dd->cspec->updthresh_dflt;
4434 dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
4435 dd->sendctrl |= (dd->cspec->updthresh &
4436 SYM_RMASK(SendCtrl, AvailUpdThld)) <<
4437 SYM_LSB(SendCtrl, AvailUpdThld);
4438 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4439 sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
4440 }
4441 break;
4442 case TXCHK_CHG_TYPE_USER:
4443 spin_lock_irqsave(&dd->sendctrl_lock, flags);
4444 if (rcd && rcd->subctxt_cnt && ((rcd->piocnt
4445 / rcd->subctxt_cnt) - 1) < dd->cspec->updthresh) {
4446 dd->cspec->updthresh = (rcd->piocnt /
4447 rcd->subctxt_cnt) - 1;
4448 dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
4449 dd->sendctrl |= (dd->cspec->updthresh &
4450 SYM_RMASK(SendCtrl, AvailUpdThld))
4451 << SYM_LSB(SendCtrl, AvailUpdThld);
4452 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4453 sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
4454 } else
4455 spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4456 break;
4457 }
4458 }
4459
4460 static void writescratch(struct qib_devdata *dd, u32 val)
4461 {
4462 qib_write_kreg(dd, kr_scratch, val);
4463 }
4464
4465 #define VALID_TS_RD_REG_MASK 0xBF
4466 /**
4467 * qib_7220_tempsense_read - read register of temp sensor via TWSI
4468 * @dd: the qlogic_ib device
4469 * @regnum: register to read from
4470 *
4471 * returns reg contents (0..255) or < 0 for error
4472 */
4473 static int qib_7220_tempsense_rd(struct qib_devdata *dd, int regnum)
4474 {
4475 int ret;
4476 u8 rdata;
4477
4478 if (regnum > 7) {
4479 ret = -EINVAL;
4480 goto bail;
4481 }
4482
4483 /* return a bogus value for (the one) register we do not have */
4484 if (!((1 << regnum) & VALID_TS_RD_REG_MASK)) {
4485 ret = 0;
4486 goto bail;
4487 }
4488
4489 ret = mutex_lock_interruptible(&dd->eep_lock);
4490 if (ret)
4491 goto bail;
4492
4493 ret = qib_twsi_blk_rd(dd, QIB_TWSI_TEMP_DEV, regnum, &rdata, 1);
4494 if (!ret)
4495 ret = rdata;
4496
4497 mutex_unlock(&dd->eep_lock);
4498
4499 /*
4500 * There are three possibilities here:
4501 * ret is actual value (0..255)
4502 * ret is -ENXIO or -EINVAL from twsi code or this file
4503 * ret is -EINTR from mutex_lock_interruptible.
4504 */
4505 bail:
4506 return ret;
4507 }
4508
4509 /* Dummy function, as 7220 boards never disable EEPROM Write */
4510 static int qib_7220_eeprom_wen(struct qib_devdata *dd, int wen)
4511 {
4512 return 1;
4513 }
4514
4515 /**
4516 * qib_init_iba7220_funcs - set up the chip-specific function pointers
4517 * @dev: the pci_dev for qlogic_ib device
4518 * @ent: pci_device_id struct for this dev
4519 *
4520 * This is global, and is called directly at init to set up the
4521 * chip-specific function pointers for later use.
4522 */
4523 struct qib_devdata *qib_init_iba7220_funcs(struct pci_dev *pdev,
4524 const struct pci_device_id *ent)
4525 {
4526 struct qib_devdata *dd;
4527 int ret;
4528 u32 boardid, minwidth;
4529
4530 dd = qib_alloc_devdata(pdev, sizeof(struct qib_chip_specific) +
4531 sizeof(struct qib_chippport_specific));
4532 if (IS_ERR(dd))
4533 goto bail;
4534
4535 dd->f_bringup_serdes = qib_7220_bringup_serdes;
4536 dd->f_cleanup = qib_setup_7220_cleanup;
4537 dd->f_clear_tids = qib_7220_clear_tids;
4538 dd->f_free_irq = qib_7220_free_irq;
4539 dd->f_get_base_info = qib_7220_get_base_info;
4540 dd->f_get_msgheader = qib_7220_get_msgheader;
4541 dd->f_getsendbuf = qib_7220_getsendbuf;
4542 dd->f_gpio_mod = gpio_7220_mod;
4543 dd->f_eeprom_wen = qib_7220_eeprom_wen;
4544 dd->f_hdrqempty = qib_7220_hdrqempty;
4545 dd->f_ib_updown = qib_7220_ib_updown;
4546 dd->f_init_ctxt = qib_7220_init_ctxt;
4547 dd->f_initvl15_bufs = qib_7220_initvl15_bufs;
4548 dd->f_intr_fallback = qib_7220_intr_fallback;
4549 dd->f_late_initreg = qib_late_7220_initreg;
4550 dd->f_setpbc_control = qib_7220_setpbc_control;
4551 dd->f_portcntr = qib_portcntr_7220;
4552 dd->f_put_tid = qib_7220_put_tid;
4553 dd->f_quiet_serdes = qib_7220_quiet_serdes;
4554 dd->f_rcvctrl = rcvctrl_7220_mod;
4555 dd->f_read_cntrs = qib_read_7220cntrs;
4556 dd->f_read_portcntrs = qib_read_7220portcntrs;
4557 dd->f_reset = qib_setup_7220_reset;
4558 dd->f_init_sdma_regs = init_sdma_7220_regs;
4559 dd->f_sdma_busy = qib_sdma_7220_busy;
4560 dd->f_sdma_gethead = qib_sdma_7220_gethead;
4561 dd->f_sdma_sendctrl = qib_7220_sdma_sendctrl;
4562 dd->f_sdma_set_desc_cnt = qib_sdma_set_7220_desc_cnt;
4563 dd->f_sdma_update_tail = qib_sdma_update_7220_tail;
4564 dd->f_sdma_hw_clean_up = qib_7220_sdma_hw_clean_up;
4565 dd->f_sdma_hw_start_up = qib_7220_sdma_hw_start_up;
4566 dd->f_sdma_init_early = qib_7220_sdma_init_early;
4567 dd->f_sendctrl = sendctrl_7220_mod;
4568 dd->f_set_armlaunch = qib_set_7220_armlaunch;
4569 dd->f_set_cntr_sample = qib_set_cntr_7220_sample;
4570 dd->f_iblink_state = qib_7220_iblink_state;
4571 dd->f_ibphys_portstate = qib_7220_phys_portstate;
4572 dd->f_get_ib_cfg = qib_7220_get_ib_cfg;
4573 dd->f_set_ib_cfg = qib_7220_set_ib_cfg;
4574 dd->f_set_ib_loopback = qib_7220_set_loopback;
4575 dd->f_set_intr_state = qib_7220_set_intr_state;
4576 dd->f_setextled = qib_setup_7220_setextled;
4577 dd->f_txchk_change = qib_7220_txchk_change;
4578 dd->f_update_usrhead = qib_update_7220_usrhead;
4579 dd->f_wantpiobuf_intr = qib_wantpiobuf_7220_intr;
4580 dd->f_xgxs_reset = qib_7220_xgxs_reset;
4581 dd->f_writescratch = writescratch;
4582 dd->f_tempsense_rd = qib_7220_tempsense_rd;
4583 /*
4584 * Do remaining pcie setup and save pcie values in dd.
4585 * Any error printing is already done by the init code.
4586 * On return, we have the chip mapped, but chip registers
4587 * are not set up until start of qib_init_7220_variables.
4588 */
4589 ret = qib_pcie_ddinit(dd, pdev, ent);
4590 if (ret < 0)
4591 goto bail_free;
4592
4593 /* initialize chip-specific variables */
4594 ret = qib_init_7220_variables(dd);
4595 if (ret)
4596 goto bail_cleanup;
4597
4598 if (qib_mini_init)
4599 goto bail;
4600
4601 boardid = SYM_FIELD(dd->revision, Revision,
4602 BoardID);
4603 switch (boardid) {
4604 case 0:
4605 case 2:
4606 case 10:
4607 case 12:
4608 minwidth = 16; /* x16 capable boards */
4609 break;
4610 default:
4611 minwidth = 8; /* x8 capable boards */
4612 break;
4613 }
4614 if (qib_pcie_params(dd, minwidth, NULL, NULL))
4615 qib_dev_err(dd, "Failed to setup PCIe or interrupts; "
4616 "continuing anyway\n");
4617
4618 /* save IRQ for possible later use */
4619 dd->cspec->irq = pdev->irq;
4620
4621 if (qib_read_kreg64(dd, kr_hwerrstatus) &
4622 QLOGIC_IB_HWE_SERDESPLLFAILED)
4623 qib_write_kreg(dd, kr_hwerrclear,
4624 QLOGIC_IB_HWE_SERDESPLLFAILED);
4625
4626 /* setup interrupt handler (interrupt type handled above) */
4627 qib_setup_7220_interrupt(dd);
4628 qib_7220_init_hwerrors(dd);
4629
4630 /* clear diagctrl register, in case diags were running and crashed */
4631 qib_write_kreg(dd, kr_hwdiagctrl, 0);
4632
4633 goto bail;
4634
4635 bail_cleanup:
4636 qib_pcie_ddcleanup(dd);
4637 bail_free:
4638 qib_free_devdata(dd);
4639 dd = ERR_PTR(ret);
4640 bail:
4641 return dd;
4642 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree