1 // SPDX-License-Identifier: GPL-2.0
2 /* pci_schizo.c: SCHIZO/TOMATILLO specific PCI controller support.
3 *
4 * Copyright (C) 2001, 2002, 2003, 2007, 2008 David S. Miller (davem@davemloft.net)
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/pci.h>
10 #include <linux/init.h>
11 #include <linux/slab.h>
12 #include <linux/export.h>
13 #include <linux/interrupt.h>
14 #include <linux/of.h>
15 #include <linux/of_platform.h>
16 #include <linux/platform_device.h>
17 #include <linux/property.h>
18 #include <linux/numa.h>
19
20 #include <asm/iommu.h>
21 #include <asm/irq.h>
22 #include <asm/pstate.h>
23 #include <asm/prom.h>
24 #include <asm/upa.h>
25
26 #include "pci_impl.h"
27 #include "iommu_common.h"
28
29 #define DRIVER_NAME "schizo"
30 #define PFX DRIVER_NAME ": "
31
32 /* This is a convention that at least Excalibur and Merlin
33 * follow. I suppose the SCHIZO used in Starcat and friends
34 * will do similar.
35 *
36 * The only way I could see this changing is if the newlink
37 * block requires more space in Schizo's address space than
38 * they predicted, thus requiring an address space reorg when
39 * the newer Schizo is taped out.
40 */
41
42 /* Streaming buffer control register. */
43 #define SCHIZO_STRBUF_CTRL_LPTR 0x00000000000000f0UL /* LRU Lock Pointer */
44 #define SCHIZO_STRBUF_CTRL_LENAB 0x0000000000000008UL /* LRU Lock Enable */
45 #define SCHIZO_STRBUF_CTRL_RRDIS 0x0000000000000004UL /* Rerun Disable */
46 #define SCHIZO_STRBUF_CTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
47 #define SCHIZO_STRBUF_CTRL_ENAB 0x0000000000000001UL /* Streaming Buffer Enable */
48
49 /* IOMMU control register. */
50 #define SCHIZO_IOMMU_CTRL_RESV 0xfffffffff9000000UL /* Reserved */
51 #define SCHIZO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status */
52 #define SCHIZO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL /* Translation Error encountered */
53 #define SCHIZO_IOMMU_CTRL_LCKEN 0x0000000000800000UL /* Enable translation locking */
54 #define SCHIZO_IOMMU_CTRL_LCKPTR 0x0000000000780000UL /* Translation lock pointer */
55 #define SCHIZO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
56 #define SCHIZO_IOMMU_TSBSZ_1K 0x0000000000000000UL /* TSB Table 1024 8-byte entries */
57 #define SCHIZO_IOMMU_TSBSZ_2K 0x0000000000010000UL /* TSB Table 2048 8-byte entries */
58 #define SCHIZO_IOMMU_TSBSZ_4K 0x0000000000020000UL /* TSB Table 4096 8-byte entries */
59 #define SCHIZO_IOMMU_TSBSZ_8K 0x0000000000030000UL /* TSB Table 8192 8-byte entries */
60 #define SCHIZO_IOMMU_TSBSZ_16K 0x0000000000040000UL /* TSB Table 16k 8-byte entries */
61 #define SCHIZO_IOMMU_TSBSZ_32K 0x0000000000050000UL /* TSB Table 32k 8-byte entries */
62 #define SCHIZO_IOMMU_TSBSZ_64K 0x0000000000060000UL /* TSB Table 64k 8-byte entries */
63 #define SCHIZO_IOMMU_TSBSZ_128K 0x0000000000070000UL /* TSB Table 128k 8-byte entries */
64 #define SCHIZO_IOMMU_CTRL_RESV2 0x000000000000fff8UL /* Reserved */
65 #define SCHIZO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
66 #define SCHIZO_IOMMU_CTRL_DENAB 0x0000000000000002UL /* Diagnostic mode enable */
67 #define SCHIZO_IOMMU_CTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
68
69 /* Schizo config space address format is nearly identical to
70 * that of PSYCHO:
71 *
72 * 32 24 23 16 15 11 10 8 7 2 1 0
73 * ---------------------------------------------------------
74 * |0 0 0 0 0 0 0 0 0| bus | device | function | reg | 0 0 |
75 * ---------------------------------------------------------
76 */
77 #define SCHIZO_CONFIG_BASE(PBM) ((PBM)->config_space)
78 #define SCHIZO_CONFIG_ENCODE(BUS, DEVFN, REG) \
79 (((unsigned long)(BUS) << 16) | \
80 ((unsigned long)(DEVFN) << 8) | \
81 ((unsigned long)(REG)))
82
schizo_pci_config_mkaddr(struct pci_pbm_info * pbm,unsigned char bus,unsigned int devfn,int where)83 static void *schizo_pci_config_mkaddr(struct pci_pbm_info *pbm,
84 unsigned char bus,
85 unsigned int devfn,
86 int where)
87 {
88 if (!pbm)
89 return NULL;
90 bus -= pbm->pci_first_busno;
91 return (void *)
92 (SCHIZO_CONFIG_BASE(pbm) |
93 SCHIZO_CONFIG_ENCODE(bus, devfn, where));
94 }
95
96 /* SCHIZO error handling support. */
97 enum schizo_error_type {
98 UE_ERR, CE_ERR, PCI_ERR, SAFARI_ERR
99 };
100
101 static DEFINE_SPINLOCK(stc_buf_lock);
102 static unsigned long stc_error_buf[128];
103 static unsigned long stc_tag_buf[16];
104 static unsigned long stc_line_buf[16];
105
106 #define SCHIZO_UE_INO 0x30 /* Uncorrectable ECC error */
107 #define SCHIZO_CE_INO 0x31 /* Correctable ECC error */
108 #define SCHIZO_PCIERR_A_INO 0x32 /* PBM A PCI bus error */
109 #define SCHIZO_PCIERR_B_INO 0x33 /* PBM B PCI bus error */
110 #define SCHIZO_SERR_INO 0x34 /* Safari interface error */
111
112 #define SCHIZO_STC_ERR 0xb800UL /* --> 0xba00 */
113 #define SCHIZO_STC_TAG 0xba00UL /* --> 0xba80 */
114 #define SCHIZO_STC_LINE 0xbb00UL /* --> 0xbb80 */
115
116 #define SCHIZO_STCERR_WRITE 0x2UL
117 #define SCHIZO_STCERR_READ 0x1UL
118
119 #define SCHIZO_STCTAG_PPN 0x3fffffff00000000UL
120 #define SCHIZO_STCTAG_VPN 0x00000000ffffe000UL
121 #define SCHIZO_STCTAG_VALID 0x8000000000000000UL
122 #define SCHIZO_STCTAG_READ 0x4000000000000000UL
123
124 #define SCHIZO_STCLINE_LINDX 0x0000000007800000UL
125 #define SCHIZO_STCLINE_SPTR 0x000000000007e000UL
126 #define SCHIZO_STCLINE_LADDR 0x0000000000001fc0UL
127 #define SCHIZO_STCLINE_EPTR 0x000000000000003fUL
128 #define SCHIZO_STCLINE_VALID 0x0000000000600000UL
129 #define SCHIZO_STCLINE_FOFN 0x0000000000180000UL
130
__schizo_check_stc_error_pbm(struct pci_pbm_info * pbm,enum schizo_error_type type)131 static void __schizo_check_stc_error_pbm(struct pci_pbm_info *pbm,
132 enum schizo_error_type type)
133 {
134 struct strbuf *strbuf = &pbm->stc;
135 unsigned long regbase = pbm->pbm_regs;
136 unsigned long err_base, tag_base, line_base;
137 u64 control;
138 int i;
139
140 err_base = regbase + SCHIZO_STC_ERR;
141 tag_base = regbase + SCHIZO_STC_TAG;
142 line_base = regbase + SCHIZO_STC_LINE;
143
144 spin_lock(&stc_buf_lock);
145
146 /* This is __REALLY__ dangerous. When we put the
147 * streaming buffer into diagnostic mode to probe
148 * its tags and error status, we _must_ clear all
149 * of the line tag valid bits before re-enabling
150 * the streaming buffer. If any dirty data lives
151 * in the STC when we do this, we will end up
152 * invalidating it before it has a chance to reach
153 * main memory.
154 */
155 control = upa_readq(strbuf->strbuf_control);
156 upa_writeq((control | SCHIZO_STRBUF_CTRL_DENAB),
157 strbuf->strbuf_control);
158 for (i = 0; i < 128; i++) {
159 unsigned long val;
160
161 val = upa_readq(err_base + (i * 8UL));
162 upa_writeq(0UL, err_base + (i * 8UL));
163 stc_error_buf[i] = val;
164 }
165 for (i = 0; i < 16; i++) {
166 stc_tag_buf[i] = upa_readq(tag_base + (i * 8UL));
167 stc_line_buf[i] = upa_readq(line_base + (i * 8UL));
168 upa_writeq(0UL, tag_base + (i * 8UL));
169 upa_writeq(0UL, line_base + (i * 8UL));
170 }
171
172 /* OK, state is logged, exit diagnostic mode. */
173 upa_writeq(control, strbuf->strbuf_control);
174
175 for (i = 0; i < 16; i++) {
176 int j, saw_error, first, last;
177
178 saw_error = 0;
179 first = i * 8;
180 last = first + 8;
181 for (j = first; j < last; j++) {
182 unsigned long errval = stc_error_buf[j];
183 if (errval != 0) {
184 saw_error++;
185 printk("%s: STC_ERR(%d)[wr(%d)rd(%d)]\n",
186 pbm->name,
187 j,
188 (errval & SCHIZO_STCERR_WRITE) ? 1 : 0,
189 (errval & SCHIZO_STCERR_READ) ? 1 : 0);
190 }
191 }
192 if (saw_error != 0) {
193 unsigned long tagval = stc_tag_buf[i];
194 unsigned long lineval = stc_line_buf[i];
195 printk("%s: STC_TAG(%d)[PA(%016lx)VA(%08lx)V(%d)R(%d)]\n",
196 pbm->name,
197 i,
198 ((tagval & SCHIZO_STCTAG_PPN) >> 19UL),
199 (tagval & SCHIZO_STCTAG_VPN),
200 ((tagval & SCHIZO_STCTAG_VALID) ? 1 : 0),
201 ((tagval & SCHIZO_STCTAG_READ) ? 1 : 0));
202
203 /* XXX Should spit out per-bank error information... -DaveM */
204 printk("%s: STC_LINE(%d)[LIDX(%lx)SP(%lx)LADDR(%lx)EP(%lx)"
205 "V(%d)FOFN(%d)]\n",
206 pbm->name,
207 i,
208 ((lineval & SCHIZO_STCLINE_LINDX) >> 23UL),
209 ((lineval & SCHIZO_STCLINE_SPTR) >> 13UL),
210 ((lineval & SCHIZO_STCLINE_LADDR) >> 6UL),
211 ((lineval & SCHIZO_STCLINE_EPTR) >> 0UL),
212 ((lineval & SCHIZO_STCLINE_VALID) ? 1 : 0),
213 ((lineval & SCHIZO_STCLINE_FOFN) ? 1 : 0));
214 }
215 }
216
217 spin_unlock(&stc_buf_lock);
218 }
219
220 /* IOMMU is per-PBM in Schizo, so interrogate both for anonymous
221 * controller level errors.
222 */
223
224 #define SCHIZO_IOMMU_TAG 0xa580UL
225 #define SCHIZO_IOMMU_DATA 0xa600UL
226
227 #define SCHIZO_IOMMU_TAG_CTXT 0x0000001ffe000000UL
228 #define SCHIZO_IOMMU_TAG_ERRSTS 0x0000000001800000UL
229 #define SCHIZO_IOMMU_TAG_ERR 0x0000000000400000UL
230 #define SCHIZO_IOMMU_TAG_WRITE 0x0000000000200000UL
231 #define SCHIZO_IOMMU_TAG_STREAM 0x0000000000100000UL
232 #define SCHIZO_IOMMU_TAG_SIZE 0x0000000000080000UL
233 #define SCHIZO_IOMMU_TAG_VPAGE 0x000000000007ffffUL
234
235 #define SCHIZO_IOMMU_DATA_VALID 0x0000000100000000UL
236 #define SCHIZO_IOMMU_DATA_CACHE 0x0000000040000000UL
237 #define SCHIZO_IOMMU_DATA_PPAGE 0x000000003fffffffUL
238
schizo_check_iommu_error_pbm(struct pci_pbm_info * pbm,enum schizo_error_type type)239 static void schizo_check_iommu_error_pbm(struct pci_pbm_info *pbm,
240 enum schizo_error_type type)
241 {
242 struct iommu *iommu = pbm->iommu;
243 unsigned long iommu_tag[16];
244 unsigned long iommu_data[16];
245 unsigned long flags;
246 u64 control;
247 int i;
248
249 spin_lock_irqsave(&iommu->lock, flags);
250 control = upa_readq(iommu->iommu_control);
251 if (control & SCHIZO_IOMMU_CTRL_XLTEERR) {
252 unsigned long base;
253 char *type_string;
254
255 /* Clear the error encountered bit. */
256 control &= ~SCHIZO_IOMMU_CTRL_XLTEERR;
257 upa_writeq(control, iommu->iommu_control);
258
259 switch((control & SCHIZO_IOMMU_CTRL_XLTESTAT) >> 25UL) {
260 case 0:
261 type_string = "Protection Error";
262 break;
263 case 1:
264 type_string = "Invalid Error";
265 break;
266 case 2:
267 type_string = "TimeOut Error";
268 break;
269 case 3:
270 default:
271 type_string = "ECC Error";
272 break;
273 }
274 printk("%s: IOMMU Error, type[%s]\n",
275 pbm->name, type_string);
276
277 /* Put the IOMMU into diagnostic mode and probe
278 * its TLB for entries with error status.
279 *
280 * It is very possible for another DVMA to occur
281 * while we do this probe, and corrupt the system
282 * further. But we are so screwed at this point
283 * that we are likely to crash hard anyways, so
284 * get as much diagnostic information to the
285 * console as we can.
286 */
287 upa_writeq(control | SCHIZO_IOMMU_CTRL_DENAB,
288 iommu->iommu_control);
289
290 base = pbm->pbm_regs;
291
292 for (i = 0; i < 16; i++) {
293 iommu_tag[i] =
294 upa_readq(base + SCHIZO_IOMMU_TAG + (i * 8UL));
295 iommu_data[i] =
296 upa_readq(base + SCHIZO_IOMMU_DATA + (i * 8UL));
297
298 /* Now clear out the entry. */
299 upa_writeq(0, base + SCHIZO_IOMMU_TAG + (i * 8UL));
300 upa_writeq(0, base + SCHIZO_IOMMU_DATA + (i * 8UL));
301 }
302
303 /* Leave diagnostic mode. */
304 upa_writeq(control, iommu->iommu_control);
305
306 for (i = 0; i < 16; i++) {
307 unsigned long tag, data;
308
309 tag = iommu_tag[i];
310 if (!(tag & SCHIZO_IOMMU_TAG_ERR))
311 continue;
312
313 data = iommu_data[i];
314 switch((tag & SCHIZO_IOMMU_TAG_ERRSTS) >> 23UL) {
315 case 0:
316 type_string = "Protection Error";
317 break;
318 case 1:
319 type_string = "Invalid Error";
320 break;
321 case 2:
322 type_string = "TimeOut Error";
323 break;
324 case 3:
325 default:
326 type_string = "ECC Error";
327 break;
328 }
329 printk("%s: IOMMU TAG(%d)[error(%s) ctx(%x) wr(%d) str(%d) "
330 "sz(%dK) vpg(%08lx)]\n",
331 pbm->name, i, type_string,
332 (int)((tag & SCHIZO_IOMMU_TAG_CTXT) >> 25UL),
333 ((tag & SCHIZO_IOMMU_TAG_WRITE) ? 1 : 0),
334 ((tag & SCHIZO_IOMMU_TAG_STREAM) ? 1 : 0),
335 ((tag & SCHIZO_IOMMU_TAG_SIZE) ? 64 : 8),
336 (tag & SCHIZO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT);
337 printk("%s: IOMMU DATA(%d)[valid(%d) cache(%d) ppg(%016lx)]\n",
338 pbm->name, i,
339 ((data & SCHIZO_IOMMU_DATA_VALID) ? 1 : 0),
340 ((data & SCHIZO_IOMMU_DATA_CACHE) ? 1 : 0),
341 (data & SCHIZO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT);
342 }
343 }
344 if (pbm->stc.strbuf_enabled)
345 __schizo_check_stc_error_pbm(pbm, type);
346 spin_unlock_irqrestore(&iommu->lock, flags);
347 }
348
schizo_check_iommu_error(struct pci_pbm_info * pbm,enum schizo_error_type type)349 static void schizo_check_iommu_error(struct pci_pbm_info *pbm,
350 enum schizo_error_type type)
351 {
352 schizo_check_iommu_error_pbm(pbm, type);
353 if (pbm->sibling)
354 schizo_check_iommu_error_pbm(pbm->sibling, type);
355 }
356
357 /* Uncorrectable ECC error status gathering. */
358 #define SCHIZO_UE_AFSR 0x10030UL
359 #define SCHIZO_UE_AFAR 0x10038UL
360
361 #define SCHIZO_UEAFSR_PPIO 0x8000000000000000UL /* Safari */
362 #define SCHIZO_UEAFSR_PDRD 0x4000000000000000UL /* Safari/Tomatillo */
363 #define SCHIZO_UEAFSR_PDWR 0x2000000000000000UL /* Safari */
364 #define SCHIZO_UEAFSR_SPIO 0x1000000000000000UL /* Safari */
365 #define SCHIZO_UEAFSR_SDMA 0x0800000000000000UL /* Safari/Tomatillo */
366 #define SCHIZO_UEAFSR_ERRPNDG 0x0300000000000000UL /* Safari */
367 #define SCHIZO_UEAFSR_BMSK 0x000003ff00000000UL /* Safari */
368 #define SCHIZO_UEAFSR_QOFF 0x00000000c0000000UL /* Safari/Tomatillo */
369 #define SCHIZO_UEAFSR_AID 0x000000001f000000UL /* Safari/Tomatillo */
370 #define SCHIZO_UEAFSR_PARTIAL 0x0000000000800000UL /* Safari */
371 #define SCHIZO_UEAFSR_OWNEDIN 0x0000000000400000UL /* Safari */
372 #define SCHIZO_UEAFSR_MTAGSYND 0x00000000000f0000UL /* Safari */
373 #define SCHIZO_UEAFSR_MTAG 0x000000000000e000UL /* Safari */
374 #define SCHIZO_UEAFSR_ECCSYND 0x00000000000001ffUL /* Safari */
375
schizo_ue_intr(int irq,void * dev_id)376 static irqreturn_t schizo_ue_intr(int irq, void *dev_id)
377 {
378 struct pci_pbm_info *pbm = dev_id;
379 unsigned long afsr_reg = pbm->controller_regs + SCHIZO_UE_AFSR;
380 unsigned long afar_reg = pbm->controller_regs + SCHIZO_UE_AFAR;
381 unsigned long afsr, afar, error_bits;
382 int reported, limit;
383
384 /* Latch uncorrectable error status. */
385 afar = upa_readq(afar_reg);
386
387 /* If either of the error pending bits are set in the
388 * AFSR, the error status is being actively updated by
389 * the hardware and we must re-read to get a clean value.
390 */
391 limit = 1000;
392 do {
393 afsr = upa_readq(afsr_reg);
394 } while ((afsr & SCHIZO_UEAFSR_ERRPNDG) != 0 && --limit);
395
396 /* Clear the primary/secondary error status bits. */
397 error_bits = afsr &
398 (SCHIZO_UEAFSR_PPIO | SCHIZO_UEAFSR_PDRD | SCHIZO_UEAFSR_PDWR |
399 SCHIZO_UEAFSR_SPIO | SCHIZO_UEAFSR_SDMA);
400 if (!error_bits)
401 return IRQ_NONE;
402 upa_writeq(error_bits, afsr_reg);
403
404 /* Log the error. */
405 printk("%s: Uncorrectable Error, primary error type[%s]\n",
406 pbm->name,
407 (((error_bits & SCHIZO_UEAFSR_PPIO) ?
408 "PIO" :
409 ((error_bits & SCHIZO_UEAFSR_PDRD) ?
410 "DMA Read" :
411 ((error_bits & SCHIZO_UEAFSR_PDWR) ?
412 "DMA Write" : "???")))));
413 printk("%s: bytemask[%04lx] qword_offset[%lx] SAFARI_AID[%02lx]\n",
414 pbm->name,
415 (afsr & SCHIZO_UEAFSR_BMSK) >> 32UL,
416 (afsr & SCHIZO_UEAFSR_QOFF) >> 30UL,
417 (afsr & SCHIZO_UEAFSR_AID) >> 24UL);
418 printk("%s: partial[%d] owned_in[%d] mtag[%lx] mtag_synd[%lx] ecc_sync[%lx]\n",
419 pbm->name,
420 (afsr & SCHIZO_UEAFSR_PARTIAL) ? 1 : 0,
421 (afsr & SCHIZO_UEAFSR_OWNEDIN) ? 1 : 0,
422 (afsr & SCHIZO_UEAFSR_MTAG) >> 13UL,
423 (afsr & SCHIZO_UEAFSR_MTAGSYND) >> 16UL,
424 (afsr & SCHIZO_UEAFSR_ECCSYND) >> 0UL);
425 printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
426 printk("%s: UE Secondary errors [", pbm->name);
427 reported = 0;
428 if (afsr & SCHIZO_UEAFSR_SPIO) {
429 reported++;
430 printk("(PIO)");
431 }
432 if (afsr & SCHIZO_UEAFSR_SDMA) {
433 reported++;
434 printk("(DMA)");
435 }
436 if (!reported)
437 printk("(none)");
438 printk("]\n");
439
440 /* Interrogate IOMMU for error status. */
441 schizo_check_iommu_error(pbm, UE_ERR);
442
443 return IRQ_HANDLED;
444 }
445
446 #define SCHIZO_CE_AFSR 0x10040UL
447 #define SCHIZO_CE_AFAR 0x10048UL
448
449 #define SCHIZO_CEAFSR_PPIO 0x8000000000000000UL
450 #define SCHIZO_CEAFSR_PDRD 0x4000000000000000UL
451 #define SCHIZO_CEAFSR_PDWR 0x2000000000000000UL
452 #define SCHIZO_CEAFSR_SPIO 0x1000000000000000UL
453 #define SCHIZO_CEAFSR_SDMA 0x0800000000000000UL
454 #define SCHIZO_CEAFSR_ERRPNDG 0x0300000000000000UL
455 #define SCHIZO_CEAFSR_BMSK 0x000003ff00000000UL
456 #define SCHIZO_CEAFSR_QOFF 0x00000000c0000000UL
457 #define SCHIZO_CEAFSR_AID 0x000000001f000000UL
458 #define SCHIZO_CEAFSR_PARTIAL 0x0000000000800000UL
459 #define SCHIZO_CEAFSR_OWNEDIN 0x0000000000400000UL
460 #define SCHIZO_CEAFSR_MTAGSYND 0x00000000000f0000UL
461 #define SCHIZO_CEAFSR_MTAG 0x000000000000e000UL
462 #define SCHIZO_CEAFSR_ECCSYND 0x00000000000001ffUL
463
schizo_ce_intr(int irq,void * dev_id)464 static irqreturn_t schizo_ce_intr(int irq, void *dev_id)
465 {
466 struct pci_pbm_info *pbm = dev_id;
467 unsigned long afsr_reg = pbm->controller_regs + SCHIZO_CE_AFSR;
468 unsigned long afar_reg = pbm->controller_regs + SCHIZO_CE_AFAR;
469 unsigned long afsr, afar, error_bits;
470 int reported, limit;
471
472 /* Latch error status. */
473 afar = upa_readq(afar_reg);
474
475 /* If either of the error pending bits are set in the
476 * AFSR, the error status is being actively updated by
477 * the hardware and we must re-read to get a clean value.
478 */
479 limit = 1000;
480 do {
481 afsr = upa_readq(afsr_reg);
482 } while ((afsr & SCHIZO_UEAFSR_ERRPNDG) != 0 && --limit);
483
484 /* Clear primary/secondary error status bits. */
485 error_bits = afsr &
486 (SCHIZO_CEAFSR_PPIO | SCHIZO_CEAFSR_PDRD | SCHIZO_CEAFSR_PDWR |
487 SCHIZO_CEAFSR_SPIO | SCHIZO_CEAFSR_SDMA);
488 if (!error_bits)
489 return IRQ_NONE;
490 upa_writeq(error_bits, afsr_reg);
491
492 /* Log the error. */
493 printk("%s: Correctable Error, primary error type[%s]\n",
494 pbm->name,
495 (((error_bits & SCHIZO_CEAFSR_PPIO) ?
496 "PIO" :
497 ((error_bits & SCHIZO_CEAFSR_PDRD) ?
498 "DMA Read" :
499 ((error_bits & SCHIZO_CEAFSR_PDWR) ?
500 "DMA Write" : "???")))));
501
502 /* XXX Use syndrome and afar to print out module string just like
503 * XXX UDB CE trap handler does... -DaveM
504 */
505 printk("%s: bytemask[%04lx] qword_offset[%lx] SAFARI_AID[%02lx]\n",
506 pbm->name,
507 (afsr & SCHIZO_UEAFSR_BMSK) >> 32UL,
508 (afsr & SCHIZO_UEAFSR_QOFF) >> 30UL,
509 (afsr & SCHIZO_UEAFSR_AID) >> 24UL);
510 printk("%s: partial[%d] owned_in[%d] mtag[%lx] mtag_synd[%lx] ecc_sync[%lx]\n",
511 pbm->name,
512 (afsr & SCHIZO_UEAFSR_PARTIAL) ? 1 : 0,
513 (afsr & SCHIZO_UEAFSR_OWNEDIN) ? 1 : 0,
514 (afsr & SCHIZO_UEAFSR_MTAG) >> 13UL,
515 (afsr & SCHIZO_UEAFSR_MTAGSYND) >> 16UL,
516 (afsr & SCHIZO_UEAFSR_ECCSYND) >> 0UL);
517 printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
518 printk("%s: CE Secondary errors [", pbm->name);
519 reported = 0;
520 if (afsr & SCHIZO_CEAFSR_SPIO) {
521 reported++;
522 printk("(PIO)");
523 }
524 if (afsr & SCHIZO_CEAFSR_SDMA) {
525 reported++;
526 printk("(DMA)");
527 }
528 if (!reported)
529 printk("(none)");
530 printk("]\n");
531
532 return IRQ_HANDLED;
533 }
534
535 #define SCHIZO_PCI_AFSR 0x2010UL
536 #define SCHIZO_PCI_AFAR 0x2018UL
537
538 #define SCHIZO_PCIAFSR_PMA 0x8000000000000000UL /* Schizo/Tomatillo */
539 #define SCHIZO_PCIAFSR_PTA 0x4000000000000000UL /* Schizo/Tomatillo */
540 #define SCHIZO_PCIAFSR_PRTRY 0x2000000000000000UL /* Schizo/Tomatillo */
541 #define SCHIZO_PCIAFSR_PPERR 0x1000000000000000UL /* Schizo/Tomatillo */
542 #define SCHIZO_PCIAFSR_PTTO 0x0800000000000000UL /* Schizo/Tomatillo */
543 #define SCHIZO_PCIAFSR_PUNUS 0x0400000000000000UL /* Schizo */
544 #define SCHIZO_PCIAFSR_SMA 0x0200000000000000UL /* Schizo/Tomatillo */
545 #define SCHIZO_PCIAFSR_STA 0x0100000000000000UL /* Schizo/Tomatillo */
546 #define SCHIZO_PCIAFSR_SRTRY 0x0080000000000000UL /* Schizo/Tomatillo */
547 #define SCHIZO_PCIAFSR_SPERR 0x0040000000000000UL /* Schizo/Tomatillo */
548 #define SCHIZO_PCIAFSR_STTO 0x0020000000000000UL /* Schizo/Tomatillo */
549 #define SCHIZO_PCIAFSR_SUNUS 0x0010000000000000UL /* Schizo */
550 #define SCHIZO_PCIAFSR_BMSK 0x000003ff00000000UL /* Schizo/Tomatillo */
551 #define SCHIZO_PCIAFSR_BLK 0x0000000080000000UL /* Schizo/Tomatillo */
552 #define SCHIZO_PCIAFSR_CFG 0x0000000040000000UL /* Schizo/Tomatillo */
553 #define SCHIZO_PCIAFSR_MEM 0x0000000020000000UL /* Schizo/Tomatillo */
554 #define SCHIZO_PCIAFSR_IO 0x0000000010000000UL /* Schizo/Tomatillo */
555
556 #define SCHIZO_PCI_CTRL (0x2000UL)
557 #define SCHIZO_PCICTRL_BUS_UNUS (1UL << 63UL) /* Safari */
558 #define SCHIZO_PCICTRL_DTO_INT (1UL << 61UL) /* Tomatillo */
559 #define SCHIZO_PCICTRL_ARB_PRIO (0x1ff << 52UL) /* Tomatillo */
560 #define SCHIZO_PCICTRL_ESLCK (1UL << 51UL) /* Safari */
561 #define SCHIZO_PCICTRL_ERRSLOT (7UL << 48UL) /* Safari */
562 #define SCHIZO_PCICTRL_TTO_ERR (1UL << 38UL) /* Safari/Tomatillo */
563 #define SCHIZO_PCICTRL_RTRY_ERR (1UL << 37UL) /* Safari/Tomatillo */
564 #define SCHIZO_PCICTRL_DTO_ERR (1UL << 36UL) /* Safari/Tomatillo */
565 #define SCHIZO_PCICTRL_SBH_ERR (1UL << 35UL) /* Safari */
566 #define SCHIZO_PCICTRL_SERR (1UL << 34UL) /* Safari/Tomatillo */
567 #define SCHIZO_PCICTRL_PCISPD (1UL << 33UL) /* Safari */
568 #define SCHIZO_PCICTRL_MRM_PREF (1UL << 30UL) /* Tomatillo */
569 #define SCHIZO_PCICTRL_RDO_PREF (1UL << 29UL) /* Tomatillo */
570 #define SCHIZO_PCICTRL_RDL_PREF (1UL << 28UL) /* Tomatillo */
571 #define SCHIZO_PCICTRL_PTO (3UL << 24UL) /* Safari/Tomatillo */
572 #define SCHIZO_PCICTRL_PTO_SHIFT 24UL
573 #define SCHIZO_PCICTRL_TRWSW (7UL << 21UL) /* Tomatillo */
574 #define SCHIZO_PCICTRL_F_TGT_A (1UL << 20UL) /* Tomatillo */
575 #define SCHIZO_PCICTRL_S_DTO_INT (1UL << 19UL) /* Safari */
576 #define SCHIZO_PCICTRL_F_TGT_RT (1UL << 19UL) /* Tomatillo */
577 #define SCHIZO_PCICTRL_SBH_INT (1UL << 18UL) /* Safari */
578 #define SCHIZO_PCICTRL_T_DTO_INT (1UL << 18UL) /* Tomatillo */
579 #define SCHIZO_PCICTRL_EEN (1UL << 17UL) /* Safari/Tomatillo */
580 #define SCHIZO_PCICTRL_PARK (1UL << 16UL) /* Safari/Tomatillo */
581 #define SCHIZO_PCICTRL_PCIRST (1UL << 8UL) /* Safari */
582 #define SCHIZO_PCICTRL_ARB_S (0x3fUL << 0UL) /* Safari */
583 #define SCHIZO_PCICTRL_ARB_T (0xffUL << 0UL) /* Tomatillo */
584
schizo_pcierr_intr_other(struct pci_pbm_info * pbm)585 static irqreturn_t schizo_pcierr_intr_other(struct pci_pbm_info *pbm)
586 {
587 unsigned long csr_reg, csr, csr_error_bits;
588 irqreturn_t ret = IRQ_NONE;
589 u32 stat;
590
591 csr_reg = pbm->pbm_regs + SCHIZO_PCI_CTRL;
592 csr = upa_readq(csr_reg);
593 csr_error_bits =
594 csr & (SCHIZO_PCICTRL_BUS_UNUS |
595 SCHIZO_PCICTRL_TTO_ERR |
596 SCHIZO_PCICTRL_RTRY_ERR |
597 SCHIZO_PCICTRL_DTO_ERR |
598 SCHIZO_PCICTRL_SBH_ERR |
599 SCHIZO_PCICTRL_SERR);
600 if (csr_error_bits) {
601 /* Clear the errors. */
602 upa_writeq(csr, csr_reg);
603
604 /* Log 'em. */
605 if (csr_error_bits & SCHIZO_PCICTRL_BUS_UNUS)
606 printk("%s: Bus unusable error asserted.\n",
607 pbm->name);
608 if (csr_error_bits & SCHIZO_PCICTRL_TTO_ERR)
609 printk("%s: PCI TRDY# timeout error asserted.\n",
610 pbm->name);
611 if (csr_error_bits & SCHIZO_PCICTRL_RTRY_ERR)
612 printk("%s: PCI excessive retry error asserted.\n",
613 pbm->name);
614 if (csr_error_bits & SCHIZO_PCICTRL_DTO_ERR)
615 printk("%s: PCI discard timeout error asserted.\n",
616 pbm->name);
617 if (csr_error_bits & SCHIZO_PCICTRL_SBH_ERR)
618 printk("%s: PCI streaming byte hole error asserted.\n",
619 pbm->name);
620 if (csr_error_bits & SCHIZO_PCICTRL_SERR)
621 printk("%s: PCI SERR signal asserted.\n",
622 pbm->name);
623 ret = IRQ_HANDLED;
624 }
625 pbm->pci_ops->read(pbm->pci_bus, 0, PCI_STATUS, 2, &stat);
626 if (stat & (PCI_STATUS_PARITY |
627 PCI_STATUS_SIG_TARGET_ABORT |
628 PCI_STATUS_REC_TARGET_ABORT |
629 PCI_STATUS_REC_MASTER_ABORT |
630 PCI_STATUS_SIG_SYSTEM_ERROR)) {
631 printk("%s: PCI bus error, PCI_STATUS[%04x]\n",
632 pbm->name, stat);
633 pbm->pci_ops->write(pbm->pci_bus, 0, PCI_STATUS, 2, 0xffff);
634 ret = IRQ_HANDLED;
635 }
636 return ret;
637 }
638
schizo_pcierr_intr(int irq,void * dev_id)639 static irqreturn_t schizo_pcierr_intr(int irq, void *dev_id)
640 {
641 struct pci_pbm_info *pbm = dev_id;
642 unsigned long afsr_reg, afar_reg, base;
643 unsigned long afsr, afar, error_bits;
644 int reported;
645
646 base = pbm->pbm_regs;
647
648 afsr_reg = base + SCHIZO_PCI_AFSR;
649 afar_reg = base + SCHIZO_PCI_AFAR;
650
651 /* Latch error status. */
652 afar = upa_readq(afar_reg);
653 afsr = upa_readq(afsr_reg);
654
655 /* Clear primary/secondary error status bits. */
656 error_bits = afsr &
657 (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
658 SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
659 SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS |
660 SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
661 SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
662 SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS);
663 if (!error_bits)
664 return schizo_pcierr_intr_other(pbm);
665 upa_writeq(error_bits, afsr_reg);
666
667 /* Log the error. */
668 printk("%s: PCI Error, primary error type[%s]\n",
669 pbm->name,
670 (((error_bits & SCHIZO_PCIAFSR_PMA) ?
671 "Master Abort" :
672 ((error_bits & SCHIZO_PCIAFSR_PTA) ?
673 "Target Abort" :
674 ((error_bits & SCHIZO_PCIAFSR_PRTRY) ?
675 "Excessive Retries" :
676 ((error_bits & SCHIZO_PCIAFSR_PPERR) ?
677 "Parity Error" :
678 ((error_bits & SCHIZO_PCIAFSR_PTTO) ?
679 "Timeout" :
680 ((error_bits & SCHIZO_PCIAFSR_PUNUS) ?
681 "Bus Unusable" : "???"))))))));
682 printk("%s: bytemask[%04lx] was_block(%d) space(%s)\n",
683 pbm->name,
684 (afsr & SCHIZO_PCIAFSR_BMSK) >> 32UL,
685 (afsr & SCHIZO_PCIAFSR_BLK) ? 1 : 0,
686 ((afsr & SCHIZO_PCIAFSR_CFG) ?
687 "Config" :
688 ((afsr & SCHIZO_PCIAFSR_MEM) ?
689 "Memory" :
690 ((afsr & SCHIZO_PCIAFSR_IO) ?
691 "I/O" : "???"))));
692 printk("%s: PCI AFAR [%016lx]\n",
693 pbm->name, afar);
694 printk("%s: PCI Secondary errors [",
695 pbm->name);
696 reported = 0;
697 if (afsr & SCHIZO_PCIAFSR_SMA) {
698 reported++;
699 printk("(Master Abort)");
700 }
701 if (afsr & SCHIZO_PCIAFSR_STA) {
702 reported++;
703 printk("(Target Abort)");
704 }
705 if (afsr & SCHIZO_PCIAFSR_SRTRY) {
706 reported++;
707 printk("(Excessive Retries)");
708 }
709 if (afsr & SCHIZO_PCIAFSR_SPERR) {
710 reported++;
711 printk("(Parity Error)");
712 }
713 if (afsr & SCHIZO_PCIAFSR_STTO) {
714 reported++;
715 printk("(Timeout)");
716 }
717 if (afsr & SCHIZO_PCIAFSR_SUNUS) {
718 reported++;
719 printk("(Bus Unusable)");
720 }
721 if (!reported)
722 printk("(none)");
723 printk("]\n");
724
725 /* For the error types shown, scan PBM's PCI bus for devices
726 * which have logged that error type.
727 */
728
729 /* If we see a Target Abort, this could be the result of an
730 * IOMMU translation error of some sort. It is extremely
731 * useful to log this information as usually it indicates
732 * a bug in the IOMMU support code or a PCI device driver.
733 */
734 if (error_bits & (SCHIZO_PCIAFSR_PTA | SCHIZO_PCIAFSR_STA)) {
735 schizo_check_iommu_error(pbm, PCI_ERR);
736 pci_scan_for_target_abort(pbm, pbm->pci_bus);
737 }
738 if (error_bits & (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_SMA))
739 pci_scan_for_master_abort(pbm, pbm->pci_bus);
740
741 /* For excessive retries, PSYCHO/PBM will abort the device
742 * and there is no way to specifically check for excessive
743 * retries in the config space status registers. So what
744 * we hope is that we'll catch it via the master/target
745 * abort events.
746 */
747
748 if (error_bits & (SCHIZO_PCIAFSR_PPERR | SCHIZO_PCIAFSR_SPERR))
749 pci_scan_for_parity_error(pbm, pbm->pci_bus);
750
751 return IRQ_HANDLED;
752 }
753
754 #define SCHIZO_SAFARI_ERRLOG 0x10018UL
755
756 #define SAFARI_ERRLOG_ERROUT 0x8000000000000000UL
757
758 #define BUS_ERROR_BADCMD 0x4000000000000000UL /* Schizo/Tomatillo */
759 #define BUS_ERROR_SSMDIS 0x2000000000000000UL /* Safari */
760 #define BUS_ERROR_BADMA 0x1000000000000000UL /* Safari */
761 #define BUS_ERROR_BADMB 0x0800000000000000UL /* Safari */
762 #define BUS_ERROR_BADMC 0x0400000000000000UL /* Safari */
763 #define BUS_ERROR_SNOOP_GR 0x0000000000200000UL /* Tomatillo */
764 #define BUS_ERROR_SNOOP_PCI 0x0000000000100000UL /* Tomatillo */
765 #define BUS_ERROR_SNOOP_RD 0x0000000000080000UL /* Tomatillo */
766 #define BUS_ERROR_SNOOP_RDS 0x0000000000020000UL /* Tomatillo */
767 #define BUS_ERROR_SNOOP_RDSA 0x0000000000010000UL /* Tomatillo */
768 #define BUS_ERROR_SNOOP_OWN 0x0000000000008000UL /* Tomatillo */
769 #define BUS_ERROR_SNOOP_RDO 0x0000000000004000UL /* Tomatillo */
770 #define BUS_ERROR_CPU1PS 0x0000000000002000UL /* Safari */
771 #define BUS_ERROR_WDATA_PERR 0x0000000000002000UL /* Tomatillo */
772 #define BUS_ERROR_CPU1PB 0x0000000000001000UL /* Safari */
773 #define BUS_ERROR_CTRL_PERR 0x0000000000001000UL /* Tomatillo */
774 #define BUS_ERROR_CPU0PS 0x0000000000000800UL /* Safari */
775 #define BUS_ERROR_SNOOP_ERR 0x0000000000000800UL /* Tomatillo */
776 #define BUS_ERROR_CPU0PB 0x0000000000000400UL /* Safari */
777 #define BUS_ERROR_JBUS_ILL_B 0x0000000000000400UL /* Tomatillo */
778 #define BUS_ERROR_CIQTO 0x0000000000000200UL /* Safari */
779 #define BUS_ERROR_LPQTO 0x0000000000000100UL /* Safari */
780 #define BUS_ERROR_JBUS_ILL_C 0x0000000000000100UL /* Tomatillo */
781 #define BUS_ERROR_SFPQTO 0x0000000000000080UL /* Safari */
782 #define BUS_ERROR_UFPQTO 0x0000000000000040UL /* Safari */
783 #define BUS_ERROR_RD_PERR 0x0000000000000040UL /* Tomatillo */
784 #define BUS_ERROR_APERR 0x0000000000000020UL /* Safari/Tomatillo */
785 #define BUS_ERROR_UNMAP 0x0000000000000010UL /* Safari/Tomatillo */
786 #define BUS_ERROR_BUSERR 0x0000000000000004UL /* Safari/Tomatillo */
787 #define BUS_ERROR_TIMEOUT 0x0000000000000002UL /* Safari/Tomatillo */
788 #define BUS_ERROR_ILL 0x0000000000000001UL /* Safari */
789
790 /* We only expect UNMAP errors here. The rest of the Safari errors
791 * are marked fatal and thus cause a system reset.
792 */
schizo_safarierr_intr(int irq,void * dev_id)793 static irqreturn_t schizo_safarierr_intr(int irq, void *dev_id)
794 {
795 struct pci_pbm_info *pbm = dev_id;
796 u64 errlog;
797
798 errlog = upa_readq(pbm->controller_regs + SCHIZO_SAFARI_ERRLOG);
799 upa_writeq(errlog & ~(SAFARI_ERRLOG_ERROUT),
800 pbm->controller_regs + SCHIZO_SAFARI_ERRLOG);
801
802 if (!(errlog & BUS_ERROR_UNMAP)) {
803 printk("%s: Unexpected Safari/JBUS error interrupt, errlog[%016llx]\n",
804 pbm->name, errlog);
805
806 return IRQ_HANDLED;
807 }
808
809 printk("%s: Safari/JBUS interrupt, UNMAPPED error, interrogating IOMMUs.\n",
810 pbm->name);
811 schizo_check_iommu_error(pbm, SAFARI_ERR);
812
813 return IRQ_HANDLED;
814 }
815
816 /* Nearly identical to PSYCHO equivalents... */
817 #define SCHIZO_ECC_CTRL 0x10020UL
818 #define SCHIZO_ECCCTRL_EE 0x8000000000000000UL /* Enable ECC Checking */
819 #define SCHIZO_ECCCTRL_UE 0x4000000000000000UL /* Enable UE Interrupts */
820 #define SCHIZO_ECCCTRL_CE 0x2000000000000000UL /* Enable CE INterrupts */
821
822 #define SCHIZO_SAFARI_ERRCTRL 0x10008UL
823 #define SCHIZO_SAFERRCTRL_EN 0x8000000000000000UL
824 #define SCHIZO_SAFARI_IRQCTRL 0x10010UL
825 #define SCHIZO_SAFIRQCTRL_EN 0x8000000000000000UL
826
pbm_routes_this_ino(struct pci_pbm_info * pbm,u32 ino)827 static int pbm_routes_this_ino(struct pci_pbm_info *pbm, u32 ino)
828 {
829 ino &= IMAP_INO;
830
831 if (pbm->ino_bitmap & (1UL << ino))
832 return 1;
833
834 return 0;
835 }
836
837 /* How the Tomatillo IRQs are routed around is pure guesswork here.
838 *
839 * All the Tomatillo devices I see in prtconf dumps seem to have only
840 * a single PCI bus unit attached to it. It would seem they are separate
841 * devices because their PortID (ie. JBUS ID) values are all different
842 * and thus the registers are mapped to totally different locations.
843 *
844 * However, two Tomatillo's look "similar" in that the only difference
845 * in their PortID is the lowest bit.
846 *
847 * So if we were to ignore this lower bit, it certainly looks like two
848 * PCI bus units of the same Tomatillo. I still have not really
849 * figured this out...
850 */
tomatillo_register_error_handlers(struct pci_pbm_info * pbm)851 static void tomatillo_register_error_handlers(struct pci_pbm_info *pbm)
852 {
853 struct platform_device *op = of_find_device_by_node(pbm->op->dev.of_node);
854 u64 tmp, err_mask, err_no_mask;
855 int err;
856
857 /* Tomatillo IRQ property layout is:
858 * 0: PCIERR
859 * 1: UE ERR
860 * 2: CE ERR
861 * 3: SERR
862 * 4: POWER FAIL?
863 */
864
865 if (pbm_routes_this_ino(pbm, SCHIZO_UE_INO)) {
866 err = request_irq(op->archdata.irqs[1], schizo_ue_intr, 0,
867 "TOMATILLO_UE", pbm);
868 if (err)
869 printk(KERN_WARNING "%s: Could not register UE, "
870 "err=%d\n", pbm->name, err);
871 }
872 if (pbm_routes_this_ino(pbm, SCHIZO_CE_INO)) {
873 err = request_irq(op->archdata.irqs[2], schizo_ce_intr, 0,
874 "TOMATILLO_CE", pbm);
875 if (err)
876 printk(KERN_WARNING "%s: Could not register CE, "
877 "err=%d\n", pbm->name, err);
878 }
879 err = 0;
880 if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_A_INO)) {
881 err = request_irq(op->archdata.irqs[0], schizo_pcierr_intr, 0,
882 "TOMATILLO_PCIERR", pbm);
883 } else if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_B_INO)) {
884 err = request_irq(op->archdata.irqs[0], schizo_pcierr_intr, 0,
885 "TOMATILLO_PCIERR", pbm);
886 }
887 if (err)
888 printk(KERN_WARNING "%s: Could not register PCIERR, "
889 "err=%d\n", pbm->name, err);
890
891 if (pbm_routes_this_ino(pbm, SCHIZO_SERR_INO)) {
892 err = request_irq(op->archdata.irqs[3], schizo_safarierr_intr, 0,
893 "TOMATILLO_SERR", pbm);
894 if (err)
895 printk(KERN_WARNING "%s: Could not register SERR, "
896 "err=%d\n", pbm->name, err);
897 }
898
899 /* Enable UE and CE interrupts for controller. */
900 upa_writeq((SCHIZO_ECCCTRL_EE |
901 SCHIZO_ECCCTRL_UE |
902 SCHIZO_ECCCTRL_CE), pbm->controller_regs + SCHIZO_ECC_CTRL);
903
904 /* Enable PCI Error interrupts and clear error
905 * bits.
906 */
907 err_mask = (SCHIZO_PCICTRL_BUS_UNUS |
908 SCHIZO_PCICTRL_TTO_ERR |
909 SCHIZO_PCICTRL_RTRY_ERR |
910 SCHIZO_PCICTRL_SERR |
911 SCHIZO_PCICTRL_EEN);
912
913 err_no_mask = SCHIZO_PCICTRL_DTO_ERR;
914
915 tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL);
916 tmp |= err_mask;
917 tmp &= ~err_no_mask;
918 upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL);
919
920 err_mask = (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
921 SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
922 SCHIZO_PCIAFSR_PTTO |
923 SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
924 SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
925 SCHIZO_PCIAFSR_STTO);
926
927 upa_writeq(err_mask, pbm->pbm_regs + SCHIZO_PCI_AFSR);
928
929 err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SNOOP_GR |
930 BUS_ERROR_SNOOP_PCI | BUS_ERROR_SNOOP_RD |
931 BUS_ERROR_SNOOP_RDS | BUS_ERROR_SNOOP_RDSA |
932 BUS_ERROR_SNOOP_OWN | BUS_ERROR_SNOOP_RDO |
933 BUS_ERROR_WDATA_PERR | BUS_ERROR_CTRL_PERR |
934 BUS_ERROR_SNOOP_ERR | BUS_ERROR_JBUS_ILL_B |
935 BUS_ERROR_JBUS_ILL_C | BUS_ERROR_RD_PERR |
936 BUS_ERROR_APERR | BUS_ERROR_UNMAP |
937 BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT);
938
939 upa_writeq((SCHIZO_SAFERRCTRL_EN | err_mask),
940 pbm->controller_regs + SCHIZO_SAFARI_ERRCTRL);
941
942 upa_writeq((SCHIZO_SAFIRQCTRL_EN | (BUS_ERROR_UNMAP)),
943 pbm->controller_regs + SCHIZO_SAFARI_IRQCTRL);
944 }
945
schizo_register_error_handlers(struct pci_pbm_info * pbm)946 static void schizo_register_error_handlers(struct pci_pbm_info *pbm)
947 {
948 struct platform_device *op = of_find_device_by_node(pbm->op->dev.of_node);
949 u64 tmp, err_mask, err_no_mask;
950 int err;
951
952 /* Schizo IRQ property layout is:
953 * 0: PCIERR
954 * 1: UE ERR
955 * 2: CE ERR
956 * 3: SERR
957 * 4: POWER FAIL?
958 */
959
960 if (pbm_routes_this_ino(pbm, SCHIZO_UE_INO)) {
961 err = request_irq(op->archdata.irqs[1], schizo_ue_intr, 0,
962 "SCHIZO_UE", pbm);
963 if (err)
964 printk(KERN_WARNING "%s: Could not register UE, "
965 "err=%d\n", pbm->name, err);
966 }
967 if (pbm_routes_this_ino(pbm, SCHIZO_CE_INO)) {
968 err = request_irq(op->archdata.irqs[2], schizo_ce_intr, 0,
969 "SCHIZO_CE", pbm);
970 if (err)
971 printk(KERN_WARNING "%s: Could not register CE, "
972 "err=%d\n", pbm->name, err);
973 }
974 err = 0;
975 if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_A_INO)) {
976 err = request_irq(op->archdata.irqs[0], schizo_pcierr_intr, 0,
977 "SCHIZO_PCIERR", pbm);
978 } else if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_B_INO)) {
979 err = request_irq(op->archdata.irqs[0], schizo_pcierr_intr, 0,
980 "SCHIZO_PCIERR", pbm);
981 }
982 if (err)
983 printk(KERN_WARNING "%s: Could not register PCIERR, "
984 "err=%d\n", pbm->name, err);
985
986 if (pbm_routes_this_ino(pbm, SCHIZO_SERR_INO)) {
987 err = request_irq(op->archdata.irqs[3], schizo_safarierr_intr, 0,
988 "SCHIZO_SERR", pbm);
989 if (err)
990 printk(KERN_WARNING "%s: Could not register SERR, "
991 "err=%d\n", pbm->name, err);
992 }
993
994 /* Enable UE and CE interrupts for controller. */
995 upa_writeq((SCHIZO_ECCCTRL_EE |
996 SCHIZO_ECCCTRL_UE |
997 SCHIZO_ECCCTRL_CE), pbm->controller_regs + SCHIZO_ECC_CTRL);
998
999 err_mask = (SCHIZO_PCICTRL_BUS_UNUS |
1000 SCHIZO_PCICTRL_ESLCK |
1001 SCHIZO_PCICTRL_TTO_ERR |
1002 SCHIZO_PCICTRL_RTRY_ERR |
1003 SCHIZO_PCICTRL_SBH_ERR |
1004 SCHIZO_PCICTRL_SERR |
1005 SCHIZO_PCICTRL_EEN);
1006
1007 err_no_mask = (SCHIZO_PCICTRL_DTO_ERR |
1008 SCHIZO_PCICTRL_SBH_INT);
1009
1010 /* Enable PCI Error interrupts and clear error
1011 * bits for each PBM.
1012 */
1013 tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL);
1014 tmp |= err_mask;
1015 tmp &= ~err_no_mask;
1016 upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL);
1017
1018 upa_writeq((SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
1019 SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
1020 SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS |
1021 SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
1022 SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
1023 SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS),
1024 pbm->pbm_regs + SCHIZO_PCI_AFSR);
1025
1026 /* Make all Safari error conditions fatal except unmapped
1027 * errors which we make generate interrupts.
1028 */
1029 err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SSMDIS |
1030 BUS_ERROR_BADMA | BUS_ERROR_BADMB |
1031 BUS_ERROR_BADMC |
1032 BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB |
1033 BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB |
1034 BUS_ERROR_CIQTO |
1035 BUS_ERROR_LPQTO | BUS_ERROR_SFPQTO |
1036 BUS_ERROR_UFPQTO | BUS_ERROR_APERR |
1037 BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT |
1038 BUS_ERROR_ILL);
1039 #if 1
1040 /* XXX Something wrong with some Excalibur systems
1041 * XXX Sun is shipping. The behavior on a 2-cpu
1042 * XXX machine is that both CPU1 parity error bits
1043 * XXX are set and are immediately set again when
1044 * XXX their error status bits are cleared. Just
1045 * XXX ignore them for now. -DaveM
1046 */
1047 err_mask &= ~(BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB |
1048 BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB);
1049 #endif
1050
1051 upa_writeq((SCHIZO_SAFERRCTRL_EN | err_mask),
1052 pbm->controller_regs + SCHIZO_SAFARI_ERRCTRL);
1053 }
1054
pbm_config_busmastering(struct pci_pbm_info * pbm)1055 static void pbm_config_busmastering(struct pci_pbm_info *pbm)
1056 {
1057 u8 *addr;
1058
1059 /* Set cache-line size to 64 bytes, this is actually
1060 * a nop but I do it for completeness.
1061 */
1062 addr = schizo_pci_config_mkaddr(pbm, pbm->pci_first_busno,
1063 0, PCI_CACHE_LINE_SIZE);
1064 pci_config_write8(addr, 64 / sizeof(u32));
1065
1066 /* Set PBM latency timer to 64 PCI clocks. */
1067 addr = schizo_pci_config_mkaddr(pbm, pbm->pci_first_busno,
1068 0, PCI_LATENCY_TIMER);
1069 pci_config_write8(addr, 64);
1070 }
1071
schizo_scan_bus(struct pci_pbm_info * pbm,struct device * parent)1072 static void schizo_scan_bus(struct pci_pbm_info *pbm, struct device *parent)
1073 {
1074 pbm_config_busmastering(pbm);
1075 pbm->is_66mhz_capable =
1076 (of_find_property(pbm->op->dev.of_node, "66mhz-capable", NULL)
1077 != NULL);
1078
1079 pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
1080
1081 if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO)
1082 tomatillo_register_error_handlers(pbm);
1083 else
1084 schizo_register_error_handlers(pbm);
1085 }
1086
1087 #define SCHIZO_STRBUF_CONTROL (0x02800UL)
1088 #define SCHIZO_STRBUF_FLUSH (0x02808UL)
1089 #define SCHIZO_STRBUF_FSYNC (0x02810UL)
1090 #define SCHIZO_STRBUF_CTXFLUSH (0x02818UL)
1091 #define SCHIZO_STRBUF_CTXMATCH (0x10000UL)
1092
schizo_pbm_strbuf_init(struct pci_pbm_info * pbm)1093 static void schizo_pbm_strbuf_init(struct pci_pbm_info *pbm)
1094 {
1095 unsigned long base = pbm->pbm_regs;
1096 u64 control;
1097
1098 if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {
1099 /* TOMATILLO lacks streaming cache. */
1100 return;
1101 }
1102
1103 /* SCHIZO has context flushing. */
1104 pbm->stc.strbuf_control = base + SCHIZO_STRBUF_CONTROL;
1105 pbm->stc.strbuf_pflush = base + SCHIZO_STRBUF_FLUSH;
1106 pbm->stc.strbuf_fsync = base + SCHIZO_STRBUF_FSYNC;
1107 pbm->stc.strbuf_ctxflush = base + SCHIZO_STRBUF_CTXFLUSH;
1108 pbm->stc.strbuf_ctxmatch_base = base + SCHIZO_STRBUF_CTXMATCH;
1109
1110 pbm->stc.strbuf_flushflag = (volatile unsigned long *)
1111 ((((unsigned long)&pbm->stc.__flushflag_buf[0])
1112 + 63UL)
1113 & ~63UL);
1114 pbm->stc.strbuf_flushflag_pa = (unsigned long)
1115 __pa(pbm->stc.strbuf_flushflag);
1116
1117 /* Turn off LRU locking and diag mode, enable the
1118 * streaming buffer and leave the rerun-disable
1119 * setting however OBP set it.
1120 */
1121 control = upa_readq(pbm->stc.strbuf_control);
1122 control &= ~(SCHIZO_STRBUF_CTRL_LPTR |
1123 SCHIZO_STRBUF_CTRL_LENAB |
1124 SCHIZO_STRBUF_CTRL_DENAB);
1125 control |= SCHIZO_STRBUF_CTRL_ENAB;
1126 upa_writeq(control, pbm->stc.strbuf_control);
1127
1128 pbm->stc.strbuf_enabled = 1;
1129 }
1130
1131 #define SCHIZO_IOMMU_CONTROL (0x00200UL)
1132 #define SCHIZO_IOMMU_TSBBASE (0x00208UL)
1133 #define SCHIZO_IOMMU_FLUSH (0x00210UL)
1134 #define SCHIZO_IOMMU_CTXFLUSH (0x00218UL)
1135
schizo_pbm_iommu_init(struct pci_pbm_info * pbm)1136 static int schizo_pbm_iommu_init(struct pci_pbm_info *pbm)
1137 {
1138 static const u32 vdma_default[] = { 0xc0000000, 0x40000000 };
1139 unsigned long i, tagbase, database;
1140 struct iommu *iommu = pbm->iommu;
1141 int tsbsize, err;
1142 const u32 *vdma;
1143 u32 dma_mask;
1144 u64 control;
1145
1146 vdma = of_get_property(pbm->op->dev.of_node, "virtual-dma", NULL);
1147 if (!vdma)
1148 vdma = vdma_default;
1149
1150 dma_mask = vdma[0];
1151 switch (vdma[1]) {
1152 case 0x20000000:
1153 dma_mask |= 0x1fffffff;
1154 tsbsize = 64;
1155 break;
1156
1157 case 0x40000000:
1158 dma_mask |= 0x3fffffff;
1159 tsbsize = 128;
1160 break;
1161
1162 case 0x80000000:
1163 dma_mask |= 0x7fffffff;
1164 tsbsize = 128;
1165 break;
1166
1167 default:
1168 printk(KERN_ERR PFX "Strange virtual-dma size.\n");
1169 return -EINVAL;
1170 }
1171
1172 /* Register addresses, SCHIZO has iommu ctx flushing. */
1173 iommu->iommu_control = pbm->pbm_regs + SCHIZO_IOMMU_CONTROL;
1174 iommu->iommu_tsbbase = pbm->pbm_regs + SCHIZO_IOMMU_TSBBASE;
1175 iommu->iommu_flush = pbm->pbm_regs + SCHIZO_IOMMU_FLUSH;
1176 iommu->iommu_tags = iommu->iommu_flush + (0xa580UL - 0x0210UL);
1177 iommu->iommu_ctxflush = pbm->pbm_regs + SCHIZO_IOMMU_CTXFLUSH;
1178
1179 /* We use the main control/status register of SCHIZO as the write
1180 * completion register.
1181 */
1182 iommu->write_complete_reg = pbm->controller_regs + 0x10000UL;
1183
1184 /*
1185 * Invalidate TLB Entries.
1186 */
1187 control = upa_readq(iommu->iommu_control);
1188 control |= SCHIZO_IOMMU_CTRL_DENAB;
1189 upa_writeq(control, iommu->iommu_control);
1190
1191 tagbase = SCHIZO_IOMMU_TAG, database = SCHIZO_IOMMU_DATA;
1192
1193 for (i = 0; i < 16; i++) {
1194 upa_writeq(0, pbm->pbm_regs + tagbase + (i * 8UL));
1195 upa_writeq(0, pbm->pbm_regs + database + (i * 8UL));
1196 }
1197
1198 /* Leave diag mode enabled for full-flushing done
1199 * in pci_iommu.c
1200 */
1201 err = iommu_table_init(iommu, tsbsize * 8 * 1024, vdma[0], dma_mask,
1202 pbm->numa_node);
1203 if (err) {
1204 printk(KERN_ERR PFX "iommu_table_init() fails with %d\n", err);
1205 return err;
1206 }
1207
1208 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
1209
1210 control = upa_readq(iommu->iommu_control);
1211 control &= ~(SCHIZO_IOMMU_CTRL_TSBSZ | SCHIZO_IOMMU_CTRL_TBWSZ);
1212 switch (tsbsize) {
1213 case 64:
1214 control |= SCHIZO_IOMMU_TSBSZ_64K;
1215 break;
1216 case 128:
1217 control |= SCHIZO_IOMMU_TSBSZ_128K;
1218 break;
1219 }
1220
1221 control |= SCHIZO_IOMMU_CTRL_ENAB;
1222 upa_writeq(control, iommu->iommu_control);
1223
1224 return 0;
1225 }
1226
1227 #define SCHIZO_PCI_IRQ_RETRY (0x1a00UL)
1228 #define SCHIZO_IRQ_RETRY_INF 0xffUL
1229
1230 #define SCHIZO_PCI_DIAG (0x2020UL)
1231 #define SCHIZO_PCIDIAG_D_BADECC (1UL << 10UL) /* Disable BAD ECC errors (Schizo) */
1232 #define SCHIZO_PCIDIAG_D_BYPASS (1UL << 9UL) /* Disable MMU bypass mode (Schizo/Tomatillo) */
1233 #define SCHIZO_PCIDIAG_D_TTO (1UL << 8UL) /* Disable TTO errors (Schizo/Tomatillo) */
1234 #define SCHIZO_PCIDIAG_D_RTRYARB (1UL << 7UL) /* Disable retry arbitration (Schizo) */
1235 #define SCHIZO_PCIDIAG_D_RETRY (1UL << 6UL) /* Disable retry limit (Schizo/Tomatillo) */
1236 #define SCHIZO_PCIDIAG_D_INTSYNC (1UL << 5UL) /* Disable interrupt/DMA synch (Schizo/Tomatillo) */
1237 #define SCHIZO_PCIDIAG_I_DMA_PARITY (1UL << 3UL) /* Invert DMA parity (Schizo/Tomatillo) */
1238 #define SCHIZO_PCIDIAG_I_PIOD_PARITY (1UL << 2UL) /* Invert PIO data parity (Schizo/Tomatillo) */
1239 #define SCHIZO_PCIDIAG_I_PIOA_PARITY (1UL << 1UL) /* Invert PIO address parity (Schizo/Tomatillo) */
1240
1241 #define TOMATILLO_PCI_IOC_CSR (0x2248UL)
1242 #define TOMATILLO_IOC_PART_WPENAB 0x0000000000080000UL
1243 #define TOMATILLO_IOC_RDMULT_PENAB 0x0000000000040000UL
1244 #define TOMATILLO_IOC_RDONE_PENAB 0x0000000000020000UL
1245 #define TOMATILLO_IOC_RDLINE_PENAB 0x0000000000010000UL
1246 #define TOMATILLO_IOC_RDMULT_PLEN 0x000000000000c000UL
1247 #define TOMATILLO_IOC_RDMULT_PLEN_SHIFT 14UL
1248 #define TOMATILLO_IOC_RDONE_PLEN 0x0000000000003000UL
1249 #define TOMATILLO_IOC_RDONE_PLEN_SHIFT 12UL
1250 #define TOMATILLO_IOC_RDLINE_PLEN 0x0000000000000c00UL
1251 #define TOMATILLO_IOC_RDLINE_PLEN_SHIFT 10UL
1252 #define TOMATILLO_IOC_PREF_OFF 0x00000000000003f8UL
1253 #define TOMATILLO_IOC_PREF_OFF_SHIFT 3UL
1254 #define TOMATILLO_IOC_RDMULT_CPENAB 0x0000000000000004UL
1255 #define TOMATILLO_IOC_RDONE_CPENAB 0x0000000000000002UL
1256 #define TOMATILLO_IOC_RDLINE_CPENAB 0x0000000000000001UL
1257
1258 #define TOMATILLO_PCI_IOC_TDIAG (0x2250UL)
1259 #define TOMATILLO_PCI_IOC_DDIAG (0x2290UL)
1260
schizo_pbm_hw_init(struct pci_pbm_info * pbm)1261 static void schizo_pbm_hw_init(struct pci_pbm_info *pbm)
1262 {
1263 u64 tmp;
1264
1265 upa_writeq(5, pbm->pbm_regs + SCHIZO_PCI_IRQ_RETRY);
1266
1267 tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL);
1268
1269 /* Enable arbiter for all PCI slots. */
1270 tmp |= 0xff;
1271
1272 if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO &&
1273 pbm->chip_version >= 0x2)
1274 tmp |= 0x3UL << SCHIZO_PCICTRL_PTO_SHIFT;
1275
1276 if (!of_property_read_bool(pbm->op->dev.of_node, "no-bus-parking"))
1277 tmp |= SCHIZO_PCICTRL_PARK;
1278 else
1279 tmp &= ~SCHIZO_PCICTRL_PARK;
1280
1281 if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO &&
1282 pbm->chip_version <= 0x1)
1283 tmp |= SCHIZO_PCICTRL_DTO_INT;
1284 else
1285 tmp &= ~SCHIZO_PCICTRL_DTO_INT;
1286
1287 if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO)
1288 tmp |= (SCHIZO_PCICTRL_MRM_PREF |
1289 SCHIZO_PCICTRL_RDO_PREF |
1290 SCHIZO_PCICTRL_RDL_PREF);
1291
1292 upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL);
1293
1294 tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_DIAG);
1295 tmp &= ~(SCHIZO_PCIDIAG_D_RTRYARB |
1296 SCHIZO_PCIDIAG_D_RETRY |
1297 SCHIZO_PCIDIAG_D_INTSYNC);
1298 upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_DIAG);
1299
1300 if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {
1301 /* Clear prefetch lengths to workaround a bug in
1302 * Jalapeno...
1303 */
1304 tmp = (TOMATILLO_IOC_PART_WPENAB |
1305 (1 << TOMATILLO_IOC_PREF_OFF_SHIFT) |
1306 TOMATILLO_IOC_RDMULT_CPENAB |
1307 TOMATILLO_IOC_RDONE_CPENAB |
1308 TOMATILLO_IOC_RDLINE_CPENAB);
1309
1310 upa_writeq(tmp, pbm->pbm_regs + TOMATILLO_PCI_IOC_CSR);
1311 }
1312 }
1313
schizo_pbm_init(struct pci_pbm_info * pbm,struct platform_device * op,u32 portid,int chip_type)1314 static int schizo_pbm_init(struct pci_pbm_info *pbm,
1315 struct platform_device *op, u32 portid,
1316 int chip_type)
1317 {
1318 const struct linux_prom64_registers *regs;
1319 struct device_node *dp = op->dev.of_node;
1320 const char *chipset_name;
1321 int err;
1322
1323 switch (chip_type) {
1324 case PBM_CHIP_TYPE_TOMATILLO:
1325 chipset_name = "TOMATILLO";
1326 break;
1327
1328 case PBM_CHIP_TYPE_SCHIZO_PLUS:
1329 chipset_name = "SCHIZO+";
1330 break;
1331
1332 case PBM_CHIP_TYPE_SCHIZO:
1333 default:
1334 chipset_name = "SCHIZO";
1335 break;
1336 }
1337
1338 /* For SCHIZO, three OBP regs:
1339 * 1) PBM controller regs
1340 * 2) Schizo front-end controller regs (same for both PBMs)
1341 * 3) PBM PCI config space
1342 *
1343 * For TOMATILLO, four OBP regs:
1344 * 1) PBM controller regs
1345 * 2) Tomatillo front-end controller regs
1346 * 3) PBM PCI config space
1347 * 4) Ichip regs
1348 */
1349 regs = of_get_property(dp, "reg", NULL);
1350
1351 pbm->next = pci_pbm_root;
1352 pci_pbm_root = pbm;
1353
1354 pbm->numa_node = NUMA_NO_NODE;
1355
1356 pbm->pci_ops = &sun4u_pci_ops;
1357 pbm->config_space_reg_bits = 8;
1358
1359 pbm->index = pci_num_pbms++;
1360
1361 pbm->portid = portid;
1362 pbm->op = op;
1363
1364 pbm->chip_type = chip_type;
1365 pbm->chip_version = of_getintprop_default(dp, "version#", 0);
1366 pbm->chip_revision = of_getintprop_default(dp, "module-version#", 0);
1367
1368 pbm->pbm_regs = regs[0].phys_addr;
1369 pbm->controller_regs = regs[1].phys_addr - 0x10000UL;
1370
1371 if (chip_type == PBM_CHIP_TYPE_TOMATILLO)
1372 pbm->sync_reg = regs[3].phys_addr + 0x1a18UL;
1373
1374 pbm->name = dp->full_name;
1375
1376 printk("%s: %s PCI Bus Module ver[%x:%x]\n",
1377 pbm->name, chipset_name,
1378 pbm->chip_version, pbm->chip_revision);
1379
1380 schizo_pbm_hw_init(pbm);
1381
1382 pci_determine_mem_io_space(pbm);
1383
1384 pci_get_pbm_props(pbm);
1385
1386 err = schizo_pbm_iommu_init(pbm);
1387 if (err)
1388 return err;
1389
1390 schizo_pbm_strbuf_init(pbm);
1391
1392 schizo_scan_bus(pbm, &op->dev);
1393
1394 return 0;
1395 }
1396
portid_compare(u32 x,u32 y,int chip_type)1397 static inline int portid_compare(u32 x, u32 y, int chip_type)
1398 {
1399 if (chip_type == PBM_CHIP_TYPE_TOMATILLO) {
1400 if (x == (y ^ 1))
1401 return 1;
1402 return 0;
1403 }
1404 return (x == y);
1405 }
1406
schizo_find_sibling(u32 portid,int chip_type)1407 static struct pci_pbm_info *schizo_find_sibling(u32 portid, int chip_type)
1408 {
1409 struct pci_pbm_info *pbm;
1410
1411 for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
1412 if (portid_compare(pbm->portid, portid, chip_type))
1413 return pbm;
1414 }
1415 return NULL;
1416 }
1417
__schizo_init(struct platform_device * op,unsigned long chip_type)1418 static int __schizo_init(struct platform_device *op, unsigned long chip_type)
1419 {
1420 struct device_node *dp = op->dev.of_node;
1421 struct pci_pbm_info *pbm;
1422 struct iommu *iommu;
1423 u32 portid;
1424 int err;
1425
1426 portid = of_getintprop_default(dp, "portid", 0xff);
1427
1428 err = -ENOMEM;
1429 pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
1430 if (!pbm) {
1431 printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
1432 goto out_err;
1433 }
1434
1435 pbm->sibling = schizo_find_sibling(portid, chip_type);
1436
1437 iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
1438 if (!iommu) {
1439 printk(KERN_ERR PFX "Cannot allocate PBM A iommu.\n");
1440 goto out_free_pbm;
1441 }
1442
1443 pbm->iommu = iommu;
1444
1445 if (schizo_pbm_init(pbm, op, portid, chip_type))
1446 goto out_free_iommu;
1447
1448 if (pbm->sibling)
1449 pbm->sibling->sibling = pbm;
1450
1451 dev_set_drvdata(&op->dev, pbm);
1452
1453 return 0;
1454
1455 out_free_iommu:
1456 kfree(pbm->iommu);
1457
1458 out_free_pbm:
1459 kfree(pbm);
1460
1461 out_err:
1462 return err;
1463 }
1464
schizo_probe(struct platform_device * op)1465 static int schizo_probe(struct platform_device *op)
1466 {
1467 unsigned long chip_type = (unsigned long)device_get_match_data(&op->dev);
1468
1469 if (!chip_type)
1470 return -EINVAL;
1471 return __schizo_init(op, chip_type);
1472 }
1473
1474 /* The ordering of this table is very important. Some Tomatillo
1475 * nodes announce that they are compatible with both pci108e,a801
1476 * and pci108e,8001. So list the chips in reverse chronological
1477 * order.
1478 */
1479 static const struct of_device_id schizo_match[] = {
1480 {
1481 .name = "pci",
1482 .compatible = "pci108e,a801",
1483 .data = (void *) PBM_CHIP_TYPE_TOMATILLO,
1484 },
1485 {
1486 .name = "pci",
1487 .compatible = "pci108e,8002",
1488 .data = (void *) PBM_CHIP_TYPE_SCHIZO_PLUS,
1489 },
1490 {
1491 .name = "pci",
1492 .compatible = "pci108e,8001",
1493 .data = (void *) PBM_CHIP_TYPE_SCHIZO,
1494 },
1495 {},
1496 };
1497
1498 static struct platform_driver schizo_driver = {
1499 .driver = {
1500 .name = DRIVER_NAME,
1501 .of_match_table = schizo_match,
1502 },
1503 .probe = schizo_probe,
1504 };
1505
schizo_init(void)1506 static int __init schizo_init(void)
1507 {
1508 return platform_driver_register(&schizo_driver);
1509 }
1510
1511 subsys_initcall(schizo_init);
1512