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[mirror_ubuntu-kernels.git] / arch / sparc / kernel / psycho_common.c
1 // SPDX-License-Identifier: GPL-2.0
2 /* psycho_common.c: Code common to PSYCHO and derivative PCI controllers.
3 *
4 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
5 */
6 #include <linux/kernel.h>
7 #include <linux/interrupt.h>
8
9 #include <asm/upa.h>
10
11 #include "pci_impl.h"
12 #include "iommu_common.h"
13 #include "psycho_common.h"
14
15 #define PSYCHO_STRBUF_CTRL_DENAB 0x0000000000000002ULL
16 #define PSYCHO_STCERR_WRITE 0x0000000000000002ULL
17 #define PSYCHO_STCERR_READ 0x0000000000000001ULL
18 #define PSYCHO_STCTAG_PPN 0x0fffffff00000000ULL
19 #define PSYCHO_STCTAG_VPN 0x00000000ffffe000ULL
20 #define PSYCHO_STCTAG_VALID 0x0000000000000002ULL
21 #define PSYCHO_STCTAG_WRITE 0x0000000000000001ULL
22 #define PSYCHO_STCLINE_LINDX 0x0000000001e00000ULL
23 #define PSYCHO_STCLINE_SPTR 0x00000000001f8000ULL
24 #define PSYCHO_STCLINE_LADDR 0x0000000000007f00ULL
25 #define PSYCHO_STCLINE_EPTR 0x00000000000000fcULL
26 #define PSYCHO_STCLINE_VALID 0x0000000000000002ULL
27 #define PSYCHO_STCLINE_FOFN 0x0000000000000001ULL
28
29 static DEFINE_SPINLOCK(stc_buf_lock);
30 static unsigned long stc_error_buf[128];
31 static unsigned long stc_tag_buf[16];
32 static unsigned long stc_line_buf[16];
33
34 static void psycho_check_stc_error(struct pci_pbm_info *pbm)
35 {
36 unsigned long err_base, tag_base, line_base;
37 struct strbuf *strbuf = &pbm->stc;
38 u64 control;
39 int i;
40
41 if (!strbuf->strbuf_control)
42 return;
43
44 err_base = strbuf->strbuf_err_stat;
45 tag_base = strbuf->strbuf_tag_diag;
46 line_base = strbuf->strbuf_line_diag;
47
48 spin_lock(&stc_buf_lock);
49
50 /* This is __REALLY__ dangerous. When we put the streaming
51 * buffer into diagnostic mode to probe it's tags and error
52 * status, we _must_ clear all of the line tag valid bits
53 * before re-enabling the streaming buffer. If any dirty data
54 * lives in the STC when we do this, we will end up
55 * invalidating it before it has a chance to reach main
56 * memory.
57 */
58 control = upa_readq(strbuf->strbuf_control);
59 upa_writeq(control | PSYCHO_STRBUF_CTRL_DENAB, strbuf->strbuf_control);
60 for (i = 0; i < 128; i++) {
61 u64 val;
62
63 val = upa_readq(err_base + (i * 8UL));
64 upa_writeq(0UL, err_base + (i * 8UL));
65 stc_error_buf[i] = val;
66 }
67 for (i = 0; i < 16; i++) {
68 stc_tag_buf[i] = upa_readq(tag_base + (i * 8UL));
69 stc_line_buf[i] = upa_readq(line_base + (i * 8UL));
70 upa_writeq(0UL, tag_base + (i * 8UL));
71 upa_writeq(0UL, line_base + (i * 8UL));
72 }
73
74 /* OK, state is logged, exit diagnostic mode. */
75 upa_writeq(control, strbuf->strbuf_control);
76
77 for (i = 0; i < 16; i++) {
78 int j, saw_error, first, last;
79
80 saw_error = 0;
81 first = i * 8;
82 last = first + 8;
83 for (j = first; j < last; j++) {
84 u64 errval = stc_error_buf[j];
85 if (errval != 0) {
86 saw_error++;
87 printk(KERN_ERR "%s: STC_ERR(%d)[wr(%d)"
88 "rd(%d)]\n",
89 pbm->name,
90 j,
91 (errval & PSYCHO_STCERR_WRITE) ? 1 : 0,
92 (errval & PSYCHO_STCERR_READ) ? 1 : 0);
93 }
94 }
95 if (saw_error != 0) {
96 u64 tagval = stc_tag_buf[i];
97 u64 lineval = stc_line_buf[i];
98 printk(KERN_ERR "%s: STC_TAG(%d)[PA(%016llx)VA(%08llx)"
99 "V(%d)W(%d)]\n",
100 pbm->name,
101 i,
102 ((tagval & PSYCHO_STCTAG_PPN) >> 19UL),
103 (tagval & PSYCHO_STCTAG_VPN),
104 ((tagval & PSYCHO_STCTAG_VALID) ? 1 : 0),
105 ((tagval & PSYCHO_STCTAG_WRITE) ? 1 : 0));
106 printk(KERN_ERR "%s: STC_LINE(%d)[LIDX(%llx)SP(%llx)"
107 "LADDR(%llx)EP(%llx)V(%d)FOFN(%d)]\n",
108 pbm->name,
109 i,
110 ((lineval & PSYCHO_STCLINE_LINDX) >> 21UL),
111 ((lineval & PSYCHO_STCLINE_SPTR) >> 15UL),
112 ((lineval & PSYCHO_STCLINE_LADDR) >> 8UL),
113 ((lineval & PSYCHO_STCLINE_EPTR) >> 2UL),
114 ((lineval & PSYCHO_STCLINE_VALID) ? 1 : 0),
115 ((lineval & PSYCHO_STCLINE_FOFN) ? 1 : 0));
116 }
117 }
118
119 spin_unlock(&stc_buf_lock);
120 }
121
122 #define PSYCHO_IOMMU_TAG 0xa580UL
123 #define PSYCHO_IOMMU_DATA 0xa600UL
124
125 static void psycho_record_iommu_tags_and_data(struct pci_pbm_info *pbm,
126 u64 *tag, u64 *data)
127 {
128 int i;
129
130 for (i = 0; i < 16; i++) {
131 unsigned long base = pbm->controller_regs;
132 unsigned long off = i * 8UL;
133
134 tag[i] = upa_readq(base + PSYCHO_IOMMU_TAG+off);
135 data[i] = upa_readq(base + PSYCHO_IOMMU_DATA+off);
136
137 /* Now clear out the entry. */
138 upa_writeq(0, base + PSYCHO_IOMMU_TAG + off);
139 upa_writeq(0, base + PSYCHO_IOMMU_DATA + off);
140 }
141 }
142
143 #define PSYCHO_IOMMU_TAG_ERRSTS (0x3UL << 23UL)
144 #define PSYCHO_IOMMU_TAG_ERR (0x1UL << 22UL)
145 #define PSYCHO_IOMMU_TAG_WRITE (0x1UL << 21UL)
146 #define PSYCHO_IOMMU_TAG_STREAM (0x1UL << 20UL)
147 #define PSYCHO_IOMMU_TAG_SIZE (0x1UL << 19UL)
148 #define PSYCHO_IOMMU_TAG_VPAGE 0x7ffffULL
149 #define PSYCHO_IOMMU_DATA_VALID (1UL << 30UL)
150 #define PSYCHO_IOMMU_DATA_CACHE (1UL << 28UL)
151 #define PSYCHO_IOMMU_DATA_PPAGE 0xfffffffULL
152
153 static void psycho_dump_iommu_tags_and_data(struct pci_pbm_info *pbm,
154 u64 *tag, u64 *data)
155 {
156 int i;
157
158 for (i = 0; i < 16; i++) {
159 u64 tag_val, data_val;
160 const char *type_str;
161 tag_val = tag[i];
162 if (!(tag_val & PSYCHO_IOMMU_TAG_ERR))
163 continue;
164
165 data_val = data[i];
166 switch((tag_val & PSYCHO_IOMMU_TAG_ERRSTS) >> 23UL) {
167 case 0:
168 type_str = "Protection Error";
169 break;
170 case 1:
171 type_str = "Invalid Error";
172 break;
173 case 2:
174 type_str = "TimeOut Error";
175 break;
176 case 3:
177 default:
178 type_str = "ECC Error";
179 break;
180 }
181
182 printk(KERN_ERR "%s: IOMMU TAG(%d)[error(%s) wr(%d) "
183 "str(%d) sz(%dK) vpg(%08llx)]\n",
184 pbm->name, i, type_str,
185 ((tag_val & PSYCHO_IOMMU_TAG_WRITE) ? 1 : 0),
186 ((tag_val & PSYCHO_IOMMU_TAG_STREAM) ? 1 : 0),
187 ((tag_val & PSYCHO_IOMMU_TAG_SIZE) ? 64 : 8),
188 (tag_val & PSYCHO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT);
189 printk(KERN_ERR "%s: IOMMU DATA(%d)[valid(%d) cache(%d) "
190 "ppg(%016llx)]\n",
191 pbm->name, i,
192 ((data_val & PSYCHO_IOMMU_DATA_VALID) ? 1 : 0),
193 ((data_val & PSYCHO_IOMMU_DATA_CACHE) ? 1 : 0),
194 (data_val & PSYCHO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT);
195 }
196 }
197
198 #define PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL
199 #define PSYCHO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL
200
201 void psycho_check_iommu_error(struct pci_pbm_info *pbm,
202 unsigned long afsr,
203 unsigned long afar,
204 enum psycho_error_type type)
205 {
206 u64 control, iommu_tag[16], iommu_data[16];
207 struct iommu *iommu = pbm->iommu;
208 unsigned long flags;
209
210 spin_lock_irqsave(&iommu->lock, flags);
211 control = upa_readq(iommu->iommu_control);
212 if (control & PSYCHO_IOMMU_CTRL_XLTEERR) {
213 const char *type_str;
214
215 control &= ~PSYCHO_IOMMU_CTRL_XLTEERR;
216 upa_writeq(control, iommu->iommu_control);
217
218 switch ((control & PSYCHO_IOMMU_CTRL_XLTESTAT) >> 25UL) {
219 case 0:
220 type_str = "Protection Error";
221 break;
222 case 1:
223 type_str = "Invalid Error";
224 break;
225 case 2:
226 type_str = "TimeOut Error";
227 break;
228 case 3:
229 default:
230 type_str = "ECC Error";
231 break;
232 }
233 printk(KERN_ERR "%s: IOMMU Error, type[%s]\n",
234 pbm->name, type_str);
235
236 /* It is very possible for another DVMA to occur while
237 * we do this probe, and corrupt the system further.
238 * But we are so screwed at this point that we are
239 * likely to crash hard anyways, so get as much
240 * diagnostic information to the console as we can.
241 */
242 psycho_record_iommu_tags_and_data(pbm, iommu_tag, iommu_data);
243 psycho_dump_iommu_tags_and_data(pbm, iommu_tag, iommu_data);
244 }
245 psycho_check_stc_error(pbm);
246 spin_unlock_irqrestore(&iommu->lock, flags);
247 }
248
249 #define PSYCHO_PCICTRL_SBH_ERR 0x0000000800000000UL
250 #define PSYCHO_PCICTRL_SERR 0x0000000400000000UL
251
252 static irqreturn_t psycho_pcierr_intr_other(struct pci_pbm_info *pbm)
253 {
254 irqreturn_t ret = IRQ_NONE;
255 u64 csr, csr_error_bits;
256 u16 stat, *addr;
257
258 csr = upa_readq(pbm->pci_csr);
259 csr_error_bits = csr & (PSYCHO_PCICTRL_SBH_ERR | PSYCHO_PCICTRL_SERR);
260 if (csr_error_bits) {
261 /* Clear the errors. */
262 upa_writeq(csr, pbm->pci_csr);
263
264 /* Log 'em. */
265 if (csr_error_bits & PSYCHO_PCICTRL_SBH_ERR)
266 printk(KERN_ERR "%s: PCI streaming byte hole "
267 "error asserted.\n", pbm->name);
268 if (csr_error_bits & PSYCHO_PCICTRL_SERR)
269 printk(KERN_ERR "%s: PCI SERR signal asserted.\n",
270 pbm->name);
271 ret = IRQ_HANDLED;
272 }
273 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
274 0, PCI_STATUS);
275 pci_config_read16(addr, &stat);
276 if (stat & (PCI_STATUS_PARITY |
277 PCI_STATUS_SIG_TARGET_ABORT |
278 PCI_STATUS_REC_TARGET_ABORT |
279 PCI_STATUS_REC_MASTER_ABORT |
280 PCI_STATUS_SIG_SYSTEM_ERROR)) {
281 printk(KERN_ERR "%s: PCI bus error, PCI_STATUS[%04x]\n",
282 pbm->name, stat);
283 pci_config_write16(addr, 0xffff);
284 ret = IRQ_HANDLED;
285 }
286 return ret;
287 }
288
289 #define PSYCHO_PCIAFSR_PMA 0x8000000000000000ULL
290 #define PSYCHO_PCIAFSR_PTA 0x4000000000000000ULL
291 #define PSYCHO_PCIAFSR_PRTRY 0x2000000000000000ULL
292 #define PSYCHO_PCIAFSR_PPERR 0x1000000000000000ULL
293 #define PSYCHO_PCIAFSR_SMA 0x0800000000000000ULL
294 #define PSYCHO_PCIAFSR_STA 0x0400000000000000ULL
295 #define PSYCHO_PCIAFSR_SRTRY 0x0200000000000000ULL
296 #define PSYCHO_PCIAFSR_SPERR 0x0100000000000000ULL
297 #define PSYCHO_PCIAFSR_RESV1 0x00ff000000000000ULL
298 #define PSYCHO_PCIAFSR_BMSK 0x0000ffff00000000ULL
299 #define PSYCHO_PCIAFSR_BLK 0x0000000080000000ULL
300 #define PSYCHO_PCIAFSR_RESV2 0x0000000040000000ULL
301 #define PSYCHO_PCIAFSR_MID 0x000000003e000000ULL
302 #define PSYCHO_PCIAFSR_RESV3 0x0000000001ffffffULL
303
304 irqreturn_t psycho_pcierr_intr(int irq, void *dev_id)
305 {
306 struct pci_pbm_info *pbm = dev_id;
307 u64 afsr, afar, error_bits;
308 int reported;
309
310 afsr = upa_readq(pbm->pci_afsr);
311 afar = upa_readq(pbm->pci_afar);
312 error_bits = afsr &
313 (PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_PTA |
314 PSYCHO_PCIAFSR_PRTRY | PSYCHO_PCIAFSR_PPERR |
315 PSYCHO_PCIAFSR_SMA | PSYCHO_PCIAFSR_STA |
316 PSYCHO_PCIAFSR_SRTRY | PSYCHO_PCIAFSR_SPERR);
317 if (!error_bits)
318 return psycho_pcierr_intr_other(pbm);
319 upa_writeq(error_bits, pbm->pci_afsr);
320 printk(KERN_ERR "%s: PCI Error, primary error type[%s]\n",
321 pbm->name,
322 (((error_bits & PSYCHO_PCIAFSR_PMA) ?
323 "Master Abort" :
324 ((error_bits & PSYCHO_PCIAFSR_PTA) ?
325 "Target Abort" :
326 ((error_bits & PSYCHO_PCIAFSR_PRTRY) ?
327 "Excessive Retries" :
328 ((error_bits & PSYCHO_PCIAFSR_PPERR) ?
329 "Parity Error" : "???"))))));
330 printk(KERN_ERR "%s: bytemask[%04llx] UPA_MID[%02llx] was_block(%d)\n",
331 pbm->name,
332 (afsr & PSYCHO_PCIAFSR_BMSK) >> 32UL,
333 (afsr & PSYCHO_PCIAFSR_MID) >> 25UL,
334 (afsr & PSYCHO_PCIAFSR_BLK) ? 1 : 0);
335 printk(KERN_ERR "%s: PCI AFAR [%016llx]\n", pbm->name, afar);
336 printk(KERN_ERR "%s: PCI Secondary errors [", pbm->name);
337 reported = 0;
338 if (afsr & PSYCHO_PCIAFSR_SMA) {
339 reported++;
340 printk("(Master Abort)");
341 }
342 if (afsr & PSYCHO_PCIAFSR_STA) {
343 reported++;
344 printk("(Target Abort)");
345 }
346 if (afsr & PSYCHO_PCIAFSR_SRTRY) {
347 reported++;
348 printk("(Excessive Retries)");
349 }
350 if (afsr & PSYCHO_PCIAFSR_SPERR) {
351 reported++;
352 printk("(Parity Error)");
353 }
354 if (!reported)
355 printk("(none)");
356 printk("]\n");
357
358 if (error_bits & (PSYCHO_PCIAFSR_PTA | PSYCHO_PCIAFSR_STA)) {
359 psycho_check_iommu_error(pbm, afsr, afar, PCI_ERR);
360 pci_scan_for_target_abort(pbm, pbm->pci_bus);
361 }
362 if (error_bits & (PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_SMA))
363 pci_scan_for_master_abort(pbm, pbm->pci_bus);
364
365 if (error_bits & (PSYCHO_PCIAFSR_PPERR | PSYCHO_PCIAFSR_SPERR))
366 pci_scan_for_parity_error(pbm, pbm->pci_bus);
367
368 return IRQ_HANDLED;
369 }
370
371 static void psycho_iommu_flush(struct pci_pbm_info *pbm)
372 {
373 int i;
374
375 for (i = 0; i < 16; i++) {
376 unsigned long off = i * 8;
377
378 upa_writeq(0, pbm->controller_regs + PSYCHO_IOMMU_TAG + off);
379 upa_writeq(0, pbm->controller_regs + PSYCHO_IOMMU_DATA + off);
380 }
381 }
382
383 #define PSYCHO_IOMMU_CONTROL 0x0200UL
384 #define PSYCHO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL
385 #define PSYCHO_IOMMU_TSBSZ_1K 0x0000000000000000UL
386 #define PSYCHO_IOMMU_TSBSZ_2K 0x0000000000010000UL
387 #define PSYCHO_IOMMU_TSBSZ_4K 0x0000000000020000UL
388 #define PSYCHO_IOMMU_TSBSZ_8K 0x0000000000030000UL
389 #define PSYCHO_IOMMU_TSBSZ_16K 0x0000000000040000UL
390 #define PSYCHO_IOMMU_TSBSZ_32K 0x0000000000050000UL
391 #define PSYCHO_IOMMU_TSBSZ_64K 0x0000000000060000UL
392 #define PSYCHO_IOMMU_TSBSZ_128K 0x0000000000070000UL
393 #define PSYCHO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL
394 #define PSYCHO_IOMMU_CTRL_DENAB 0x0000000000000002UL
395 #define PSYCHO_IOMMU_CTRL_ENAB 0x0000000000000001UL
396 #define PSYCHO_IOMMU_FLUSH 0x0210UL
397 #define PSYCHO_IOMMU_TSBBASE 0x0208UL
398
399 int psycho_iommu_init(struct pci_pbm_info *pbm, int tsbsize,
400 u32 dvma_offset, u32 dma_mask,
401 unsigned long write_complete_offset)
402 {
403 struct iommu *iommu = pbm->iommu;
404 u64 control;
405 int err;
406
407 iommu->iommu_control = pbm->controller_regs + PSYCHO_IOMMU_CONTROL;
408 iommu->iommu_tsbbase = pbm->controller_regs + PSYCHO_IOMMU_TSBBASE;
409 iommu->iommu_flush = pbm->controller_regs + PSYCHO_IOMMU_FLUSH;
410 iommu->iommu_tags = pbm->controller_regs + PSYCHO_IOMMU_TAG;
411 iommu->write_complete_reg = (pbm->controller_regs +
412 write_complete_offset);
413
414 iommu->iommu_ctxflush = 0;
415
416 control = upa_readq(iommu->iommu_control);
417 control |= PSYCHO_IOMMU_CTRL_DENAB;
418 upa_writeq(control, iommu->iommu_control);
419
420 psycho_iommu_flush(pbm);
421
422 /* Leave diag mode enabled for full-flushing done in pci_iommu.c */
423 err = iommu_table_init(iommu, tsbsize * 1024 * 8,
424 dvma_offset, dma_mask, pbm->numa_node);
425 if (err)
426 return err;
427
428 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
429
430 control = upa_readq(iommu->iommu_control);
431 control &= ~(PSYCHO_IOMMU_CTRL_TSBSZ | PSYCHO_IOMMU_CTRL_TBWSZ);
432 control |= PSYCHO_IOMMU_CTRL_ENAB;
433
434 switch (tsbsize) {
435 case 64:
436 control |= PSYCHO_IOMMU_TSBSZ_64K;
437 break;
438 case 128:
439 control |= PSYCHO_IOMMU_TSBSZ_128K;
440 break;
441 default:
442 return -EINVAL;
443 }
444
445 upa_writeq(control, iommu->iommu_control);
446
447 return 0;
448
449 }
450
451 void psycho_pbm_init_common(struct pci_pbm_info *pbm, struct platform_device *op,
452 const char *chip_name, int chip_type)
453 {
454 struct device_node *dp = op->dev.of_node;
455
456 pbm->name = dp->full_name;
457 pbm->numa_node = -1;
458 pbm->chip_type = chip_type;
459 pbm->chip_version = of_getintprop_default(dp, "version#", 0);
460 pbm->chip_revision = of_getintprop_default(dp, "module-revision#", 0);
461 pbm->op = op;
462 pbm->pci_ops = &sun4u_pci_ops;
463 pbm->config_space_reg_bits = 8;
464 pbm->index = pci_num_pbms++;
465 pci_get_pbm_props(pbm);
466 pci_determine_mem_io_space(pbm);
467
468 printk(KERN_INFO "%s: %s PCI Bus Module ver[%x:%x]\n",
469 pbm->name, chip_name,
470 pbm->chip_version, pbm->chip_revision);
471 }
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