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1/*
2 * sbus.c: UltraSparc SBUS controller support.
3 *
4 * Copyright (C) 1999 David S. Miller (davem@redhat.com)
5 */
6
7#include <linux/kernel.h>
8#include <linux/types.h>
9#include <linux/mm.h>
10#include <linux/spinlock.h>
11#include <linux/slab.h>
12#include <linux/export.h>
13#include <linux/init.h>
14#include <linux/interrupt.h>
15#include <linux/of.h>
16#include <linux/of_device.h>
17
18#include <asm/page.h>
19#include <asm/io.h>
20#include <asm/upa.h>
21#include <asm/cache.h>
22#include <asm/dma.h>
23#include <asm/irq.h>
24#include <asm/prom.h>
25#include <asm/oplib.h>
26#include <asm/starfire.h>
27
28#include "iommu_common.h"
29
30#define MAP_BASE ((u32)0xc0000000)
31
32/* Offsets from iommu_regs */
33#define SYSIO_IOMMUREG_BASE 0x2400UL
34#define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */
35#define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */
36#define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */
37#define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */
38#define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */
39#define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */
40#define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */
41#define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */
42
43#define IOMMU_DRAM_VALID (1UL << 30UL)
44
45/* Offsets from strbuf_regs */
46#define SYSIO_STRBUFREG_BASE 0x2800UL
47#define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */
48#define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */
49#define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */
50#define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */
51#define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */
52#define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */
53#define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */
54
55#define STRBUF_TAG_VALID 0x02UL
56
57/* Enable 64-bit DVMA mode for the given device. */
58void sbus_set_sbus64(struct device *dev, int bursts)
59{
60 struct iommu *iommu = dev->archdata.iommu;
61 struct platform_device *op = to_platform_device(dev);
62 const struct linux_prom_registers *regs;
63 unsigned long cfg_reg;
64 int slot;
65 u64 val;
66
67 regs = of_get_property(op->dev.of_node, "reg", NULL);
68 if (!regs) {
69 printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %s\n",
70 op->dev.of_node->full_name);
71 return;
72 }
73 slot = regs->which_io;
74
75 cfg_reg = iommu->write_complete_reg;
76 switch (slot) {
77 case 0:
78 cfg_reg += 0x20UL;
79 break;
80 case 1:
81 cfg_reg += 0x28UL;
82 break;
83 case 2:
84 cfg_reg += 0x30UL;
85 break;
86 case 3:
87 cfg_reg += 0x38UL;
88 break;
89 case 13:
90 cfg_reg += 0x40UL;
91 break;
92 case 14:
93 cfg_reg += 0x48UL;
94 break;
95 case 15:
96 cfg_reg += 0x50UL;
97 break;
98
99 default:
100 return;
101 }
102
103 val = upa_readq(cfg_reg);
104 if (val & (1UL << 14UL)) {
105 /* Extended transfer mode already enabled. */
106 return;
107 }
108
109 val |= (1UL << 14UL);
110
111 if (bursts & DMA_BURST8)
112 val |= (1UL << 1UL);
113 if (bursts & DMA_BURST16)
114 val |= (1UL << 2UL);
115 if (bursts & DMA_BURST32)
116 val |= (1UL << 3UL);
117 if (bursts & DMA_BURST64)
118 val |= (1UL << 4UL);
119 upa_writeq(val, cfg_reg);
120}
121EXPORT_SYMBOL(sbus_set_sbus64);
122
123/* INO number to IMAP register offset for SYSIO external IRQ's.
124 * This should conform to both Sunfire/Wildfire server and Fusion
125 * desktop designs.
126 */
127#define SYSIO_IMAP_SLOT0 0x2c00UL
128#define SYSIO_IMAP_SLOT1 0x2c08UL
129#define SYSIO_IMAP_SLOT2 0x2c10UL
130#define SYSIO_IMAP_SLOT3 0x2c18UL
131#define SYSIO_IMAP_SCSI 0x3000UL
132#define SYSIO_IMAP_ETH 0x3008UL
133#define SYSIO_IMAP_BPP 0x3010UL
134#define SYSIO_IMAP_AUDIO 0x3018UL
135#define SYSIO_IMAP_PFAIL 0x3020UL
136#define SYSIO_IMAP_KMS 0x3028UL
137#define SYSIO_IMAP_FLPY 0x3030UL
138#define SYSIO_IMAP_SHW 0x3038UL
139#define SYSIO_IMAP_KBD 0x3040UL
140#define SYSIO_IMAP_MS 0x3048UL
141#define SYSIO_IMAP_SER 0x3050UL
142#define SYSIO_IMAP_TIM0 0x3060UL
143#define SYSIO_IMAP_TIM1 0x3068UL
144#define SYSIO_IMAP_UE 0x3070UL
145#define SYSIO_IMAP_CE 0x3078UL
146#define SYSIO_IMAP_SBERR 0x3080UL
147#define SYSIO_IMAP_PMGMT 0x3088UL
148#define SYSIO_IMAP_GFX 0x3090UL
149#define SYSIO_IMAP_EUPA 0x3098UL
150
151#define bogon ((unsigned long) -1)
152static unsigned long sysio_irq_offsets[] = {
153 /* SBUS Slot 0 --> 3, level 1 --> 7 */
154 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
155 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
156 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
157 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
158 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
159 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
160 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
161 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
162
163 /* Onboard devices (not relevant/used on SunFire). */
164 SYSIO_IMAP_SCSI,
165 SYSIO_IMAP_ETH,
166 SYSIO_IMAP_BPP,
167 bogon,
168 SYSIO_IMAP_AUDIO,
169 SYSIO_IMAP_PFAIL,
170 bogon,
171 bogon,
172 SYSIO_IMAP_KMS,
173 SYSIO_IMAP_FLPY,
174 SYSIO_IMAP_SHW,
175 SYSIO_IMAP_KBD,
176 SYSIO_IMAP_MS,
177 SYSIO_IMAP_SER,
178 bogon,
179 bogon,
180 SYSIO_IMAP_TIM0,
181 SYSIO_IMAP_TIM1,
182 bogon,
183 bogon,
184 SYSIO_IMAP_UE,
185 SYSIO_IMAP_CE,
186 SYSIO_IMAP_SBERR,
187 SYSIO_IMAP_PMGMT,
188};
189
190#undef bogon
191
192#define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
193
194/* Convert Interrupt Mapping register pointer to associated
195 * Interrupt Clear register pointer, SYSIO specific version.
196 */
197#define SYSIO_ICLR_UNUSED0 0x3400UL
198#define SYSIO_ICLR_SLOT0 0x3408UL
199#define SYSIO_ICLR_SLOT1 0x3448UL
200#define SYSIO_ICLR_SLOT2 0x3488UL
201#define SYSIO_ICLR_SLOT3 0x34c8UL
202static unsigned long sysio_imap_to_iclr(unsigned long imap)
203{
204 unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
205 return imap + diff;
206}
207
208static unsigned int sbus_build_irq(struct platform_device *op, unsigned int ino)
209{
210 struct iommu *iommu = op->dev.archdata.iommu;
211 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
212 unsigned long imap, iclr;
213 int sbus_level = 0;
214
215 imap = sysio_irq_offsets[ino];
216 if (imap == ((unsigned long)-1)) {
217 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
218 ino);
219 prom_halt();
220 }
221 imap += reg_base;
222
223 /* SYSIO inconsistency. For external SLOTS, we have to select
224 * the right ICLR register based upon the lower SBUS irq level
225 * bits.
226 */
227 if (ino >= 0x20) {
228 iclr = sysio_imap_to_iclr(imap);
229 } else {
230 int sbus_slot = (ino & 0x18)>>3;
231
232 sbus_level = ino & 0x7;
233
234 switch(sbus_slot) {
235 case 0:
236 iclr = reg_base + SYSIO_ICLR_SLOT0;
237 break;
238 case 1:
239 iclr = reg_base + SYSIO_ICLR_SLOT1;
240 break;
241 case 2:
242 iclr = reg_base + SYSIO_ICLR_SLOT2;
243 break;
244 default:
245 case 3:
246 iclr = reg_base + SYSIO_ICLR_SLOT3;
247 break;
248 }
249
250 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
251 }
252 return build_irq(sbus_level, iclr, imap);
253}
254
255/* Error interrupt handling. */
256#define SYSIO_UE_AFSR 0x0030UL
257#define SYSIO_UE_AFAR 0x0038UL
258#define SYSIO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
259#define SYSIO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
260#define SYSIO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
261#define SYSIO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
262#define SYSIO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
263#define SYSIO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
264#define SYSIO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
265#define SYSIO_UEAFSR_DOFF 0x0000e00000000000UL /* Doubleword Offset */
266#define SYSIO_UEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
267#define SYSIO_UEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
268#define SYSIO_UEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
269static irqreturn_t sysio_ue_handler(int irq, void *dev_id)
270{
271 struct platform_device *op = dev_id;
272 struct iommu *iommu = op->dev.archdata.iommu;
273 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
274 unsigned long afsr_reg, afar_reg;
275 unsigned long afsr, afar, error_bits;
276 int reported, portid;
277
278 afsr_reg = reg_base + SYSIO_UE_AFSR;
279 afar_reg = reg_base + SYSIO_UE_AFAR;
280
281 /* Latch error status. */
282 afsr = upa_readq(afsr_reg);
283 afar = upa_readq(afar_reg);
284
285 /* Clear primary/secondary error status bits. */
286 error_bits = afsr &
287 (SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR |
288 SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR);
289 upa_writeq(error_bits, afsr_reg);
290
291 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
292
293 /* Log the error. */
294 printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]\n",
295 portid,
296 (((error_bits & SYSIO_UEAFSR_PPIO) ?
297 "PIO" :
298 ((error_bits & SYSIO_UEAFSR_PDRD) ?
299 "DVMA Read" :
300 ((error_bits & SYSIO_UEAFSR_PDWR) ?
301 "DVMA Write" : "???")))));
302 printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]\n",
303 portid,
304 (afsr & SYSIO_UEAFSR_DOFF) >> 45UL,
305 (afsr & SYSIO_UEAFSR_SIZE) >> 42UL,
306 (afsr & SYSIO_UEAFSR_MID) >> 37UL);
307 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
308 printk("SYSIO[%x]: Secondary UE errors [", portid);
309 reported = 0;
310 if (afsr & SYSIO_UEAFSR_SPIO) {
311 reported++;
312 printk("(PIO)");
313 }
314 if (afsr & SYSIO_UEAFSR_SDRD) {
315 reported++;
316 printk("(DVMA Read)");
317 }
318 if (afsr & SYSIO_UEAFSR_SDWR) {
319 reported++;
320 printk("(DVMA Write)");
321 }
322 if (!reported)
323 printk("(none)");
324 printk("]\n");
325
326 return IRQ_HANDLED;
327}
328
329#define SYSIO_CE_AFSR 0x0040UL
330#define SYSIO_CE_AFAR 0x0048UL
331#define SYSIO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
332#define SYSIO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
333#define SYSIO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
334#define SYSIO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO cause */
335#define SYSIO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
336#define SYSIO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
337#define SYSIO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
338#define SYSIO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
339#define SYSIO_CEAFSR_DOFF 0x0000e00000000000UL /* Double Offset */
340#define SYSIO_CEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
341#define SYSIO_CEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
342#define SYSIO_CEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
343static irqreturn_t sysio_ce_handler(int irq, void *dev_id)
344{
345 struct platform_device *op = dev_id;
346 struct iommu *iommu = op->dev.archdata.iommu;
347 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
348 unsigned long afsr_reg, afar_reg;
349 unsigned long afsr, afar, error_bits;
350 int reported, portid;
351
352 afsr_reg = reg_base + SYSIO_CE_AFSR;
353 afar_reg = reg_base + SYSIO_CE_AFAR;
354
355 /* Latch error status. */
356 afsr = upa_readq(afsr_reg);
357 afar = upa_readq(afar_reg);
358
359 /* Clear primary/secondary error status bits. */
360 error_bits = afsr &
361 (SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR |
362 SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR);
363 upa_writeq(error_bits, afsr_reg);
364
365 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
366
367 printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]\n",
368 portid,
369 (((error_bits & SYSIO_CEAFSR_PPIO) ?
370 "PIO" :
371 ((error_bits & SYSIO_CEAFSR_PDRD) ?
372 "DVMA Read" :
373 ((error_bits & SYSIO_CEAFSR_PDWR) ?
374 "DVMA Write" : "???")))));
375
376 /* XXX Use syndrome and afar to print out module string just like
377 * XXX UDB CE trap handler does... -DaveM
378 */
379 printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]\n",
380 portid,
381 (afsr & SYSIO_CEAFSR_DOFF) >> 45UL,
382 (afsr & SYSIO_CEAFSR_ESYND) >> 48UL,
383 (afsr & SYSIO_CEAFSR_SIZE) >> 42UL,
384 (afsr & SYSIO_CEAFSR_MID) >> 37UL);
385 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
386
387 printk("SYSIO[%x]: Secondary CE errors [", portid);
388 reported = 0;
389 if (afsr & SYSIO_CEAFSR_SPIO) {
390 reported++;
391 printk("(PIO)");
392 }
393 if (afsr & SYSIO_CEAFSR_SDRD) {
394 reported++;
395 printk("(DVMA Read)");
396 }
397 if (afsr & SYSIO_CEAFSR_SDWR) {
398 reported++;
399 printk("(DVMA Write)");
400 }
401 if (!reported)
402 printk("(none)");
403 printk("]\n");
404
405 return IRQ_HANDLED;
406}
407
408#define SYSIO_SBUS_AFSR 0x2010UL
409#define SYSIO_SBUS_AFAR 0x2018UL
410#define SYSIO_SBAFSR_PLE 0x8000000000000000UL /* Primary Late PIO Error */
411#define SYSIO_SBAFSR_PTO 0x4000000000000000UL /* Primary SBUS Timeout */
412#define SYSIO_SBAFSR_PBERR 0x2000000000000000UL /* Primary SBUS Error ACK */
413#define SYSIO_SBAFSR_SLE 0x1000000000000000UL /* Secondary Late PIO Error */
414#define SYSIO_SBAFSR_STO 0x0800000000000000UL /* Secondary SBUS Timeout */
415#define SYSIO_SBAFSR_SBERR 0x0400000000000000UL /* Secondary SBUS Error ACK */
416#define SYSIO_SBAFSR_RESV1 0x03ff000000000000UL /* Reserved */
417#define SYSIO_SBAFSR_RD 0x0000800000000000UL /* Primary was late PIO read */
418#define SYSIO_SBAFSR_RESV2 0x0000600000000000UL /* Reserved */
419#define SYSIO_SBAFSR_SIZE 0x00001c0000000000UL /* Size of transfer */
420#define SYSIO_SBAFSR_MID 0x000003e000000000UL /* MID causing the error */
421#define SYSIO_SBAFSR_RESV3 0x0000001fffffffffUL /* Reserved */
422static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id)
423{
424 struct platform_device *op = dev_id;
425 struct iommu *iommu = op->dev.archdata.iommu;
426 unsigned long afsr_reg, afar_reg, reg_base;
427 unsigned long afsr, afar, error_bits;
428 int reported, portid;
429
430 reg_base = iommu->write_complete_reg - 0x2000UL;
431 afsr_reg = reg_base + SYSIO_SBUS_AFSR;
432 afar_reg = reg_base + SYSIO_SBUS_AFAR;
433
434 afsr = upa_readq(afsr_reg);
435 afar = upa_readq(afar_reg);
436
437 /* Clear primary/secondary error status bits. */
438 error_bits = afsr &
439 (SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR |
440 SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR);
441 upa_writeq(error_bits, afsr_reg);
442
443 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
444
445 /* Log the error. */
446 printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)\n",
447 portid,
448 (((error_bits & SYSIO_SBAFSR_PLE) ?
449 "Late PIO Error" :
450 ((error_bits & SYSIO_SBAFSR_PTO) ?
451 "Time Out" :
452 ((error_bits & SYSIO_SBAFSR_PBERR) ?
453 "Error Ack" : "???")))),
454 (afsr & SYSIO_SBAFSR_RD) ? 1 : 0);
455 printk("SYSIO[%x]: size[%lx] MID[%lx]\n",
456 portid,
457 (afsr & SYSIO_SBAFSR_SIZE) >> 42UL,
458 (afsr & SYSIO_SBAFSR_MID) >> 37UL);
459 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
460 printk("SYSIO[%x]: Secondary SBUS errors [", portid);
461 reported = 0;
462 if (afsr & SYSIO_SBAFSR_SLE) {
463 reported++;
464 printk("(Late PIO Error)");
465 }
466 if (afsr & SYSIO_SBAFSR_STO) {
467 reported++;
468 printk("(Time Out)");
469 }
470 if (afsr & SYSIO_SBAFSR_SBERR) {
471 reported++;
472 printk("(Error Ack)");
473 }
474 if (!reported)
475 printk("(none)");
476 printk("]\n");
477
478 /* XXX check iommu/strbuf for further error status XXX */
479
480 return IRQ_HANDLED;
481}
482
483#define ECC_CONTROL 0x0020UL
484#define SYSIO_ECNTRL_ECCEN 0x8000000000000000UL /* Enable ECC Checking */
485#define SYSIO_ECNTRL_UEEN 0x4000000000000000UL /* Enable UE Interrupts */
486#define SYSIO_ECNTRL_CEEN 0x2000000000000000UL /* Enable CE Interrupts */
487
488#define SYSIO_UE_INO 0x34
489#define SYSIO_CE_INO 0x35
490#define SYSIO_SBUSERR_INO 0x36
491
492static void __init sysio_register_error_handlers(struct platform_device *op)
493{
494 struct iommu *iommu = op->dev.archdata.iommu;
495 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
496 unsigned int irq;
497 u64 control;
498 int portid;
499
500 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
501
502 irq = sbus_build_irq(op, SYSIO_UE_INO);
503 if (request_irq(irq, sysio_ue_handler, 0,
504 "SYSIO_UE", op) < 0) {
505 prom_printf("SYSIO[%x]: Cannot register UE interrupt.\n",
506 portid);
507 prom_halt();
508 }
509
510 irq = sbus_build_irq(op, SYSIO_CE_INO);
511 if (request_irq(irq, sysio_ce_handler, 0,
512 "SYSIO_CE", op) < 0) {
513 prom_printf("SYSIO[%x]: Cannot register CE interrupt.\n",
514 portid);
515 prom_halt();
516 }
517
518 irq = sbus_build_irq(op, SYSIO_SBUSERR_INO);
519 if (request_irq(irq, sysio_sbus_error_handler, 0,
520 "SYSIO_SBERR", op) < 0) {
521 prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.\n",
522 portid);
523 prom_halt();
524 }
525
526 /* Now turn the error interrupts on and also enable ECC checking. */
527 upa_writeq((SYSIO_ECNTRL_ECCEN |
528 SYSIO_ECNTRL_UEEN |
529 SYSIO_ECNTRL_CEEN),
530 reg_base + ECC_CONTROL);
531
532 control = upa_readq(iommu->write_complete_reg);
533 control |= 0x100UL; /* SBUS Error Interrupt Enable */
534 upa_writeq(control, iommu->write_complete_reg);
535}
536
537/* Boot time initialization. */
538static void __init sbus_iommu_init(struct platform_device *op)
539{
540 const struct linux_prom64_registers *pr;
541 struct device_node *dp = op->dev.of_node;
542 struct iommu *iommu;
543 struct strbuf *strbuf;
544 unsigned long regs, reg_base;
545 int i, portid;
546 u64 control;
547
548 pr = of_get_property(dp, "reg", NULL);
549 if (!pr) {
550 prom_printf("sbus_iommu_init: Cannot map SYSIO "
551 "control registers.\n");
552 prom_halt();
553 }
554 regs = pr->phys_addr;
555
556 iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC);
557 if (!iommu)
558 goto fatal_memory_error;
559 strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);
560 if (!strbuf)
561 goto fatal_memory_error;
562
563 op->dev.archdata.iommu = iommu;
564 op->dev.archdata.stc = strbuf;
565 op->dev.archdata.numa_node = -1;
566
567 reg_base = regs + SYSIO_IOMMUREG_BASE;
568 iommu->iommu_control = reg_base + IOMMU_CONTROL;
569 iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE;
570 iommu->iommu_flush = reg_base + IOMMU_FLUSH;
571 iommu->iommu_tags = iommu->iommu_control +
572 (IOMMU_TAGDIAG - IOMMU_CONTROL);
573
574 reg_base = regs + SYSIO_STRBUFREG_BASE;
575 strbuf->strbuf_control = reg_base + STRBUF_CONTROL;
576 strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH;
577 strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC;
578
579 strbuf->strbuf_enabled = 1;
580
581 strbuf->strbuf_flushflag = (volatile unsigned long *)
582 ((((unsigned long)&strbuf->__flushflag_buf[0])
583 + 63UL)
584 & ~63UL);
585 strbuf->strbuf_flushflag_pa = (unsigned long)
586 __pa(strbuf->strbuf_flushflag);
587
588 /* The SYSIO SBUS control register is used for dummy reads
589 * in order to ensure write completion.
590 */
591 iommu->write_complete_reg = regs + 0x2000UL;
592
593 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
594 printk(KERN_INFO "SYSIO: UPA portID %x, at %016lx\n",
595 portid, regs);
596
597 /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
598 if (iommu_table_init(iommu, IO_TSB_SIZE, MAP_BASE, 0xffffffff, -1))
599 goto fatal_memory_error;
600
601 control = upa_readq(iommu->iommu_control);
602 control = ((7UL << 16UL) |
603 (0UL << 2UL) |
604 (1UL << 1UL) |
605 (1UL << 0UL));
606 upa_writeq(control, iommu->iommu_control);
607
608 /* Clean out any cruft in the IOMMU using
609 * diagnostic accesses.
610 */
611 for (i = 0; i < 16; i++) {
612 unsigned long dram, tag;
613
614 dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL);
615 tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
616
617 dram += (unsigned long)i * 8UL;
618 tag += (unsigned long)i * 8UL;
619 upa_writeq(0, dram);
620 upa_writeq(0, tag);
621 }
622 upa_readq(iommu->write_complete_reg);
623
624 /* Give the TSB to SYSIO. */
625 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
626
627 /* Setup streaming buffer, DE=1 SB_EN=1 */
628 control = (1UL << 1UL) | (1UL << 0UL);
629 upa_writeq(control, strbuf->strbuf_control);
630
631 /* Clear out the tags using diagnostics. */
632 for (i = 0; i < 16; i++) {
633 unsigned long ptag, ltag;
634
635 ptag = strbuf->strbuf_control +
636 (STRBUF_PTAGDIAG - STRBUF_CONTROL);
637 ltag = strbuf->strbuf_control +
638 (STRBUF_LTAGDIAG - STRBUF_CONTROL);
639 ptag += (unsigned long)i * 8UL;
640 ltag += (unsigned long)i * 8UL;
641
642 upa_writeq(0UL, ptag);
643 upa_writeq(0UL, ltag);
644 }
645
646 /* Enable DVMA arbitration for all devices/slots. */
647 control = upa_readq(iommu->write_complete_reg);
648 control |= 0x3fUL;
649 upa_writeq(control, iommu->write_complete_reg);
650
651 /* Now some Xfire specific grot... */
652 if (this_is_starfire)
653 starfire_hookup(portid);
654
655 sysio_register_error_handlers(op);
656 return;
657
658fatal_memory_error:
659 prom_printf("sbus_iommu_init: Fatal memory allocation error.\n");
660}
661
662static int __init sbus_init(void)
663{
664 struct device_node *dp;
665
666 for_each_node_by_name(dp, "sbus") {
667 struct platform_device *op = of_find_device_by_node(dp);
668
669 sbus_iommu_init(op);
670 of_propagate_archdata(op);
671 }
672
673 return 0;
674}
675
676subsys_initcall(sbus_init);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * sbus.c: UltraSparc SBUS controller support.
4 *
5 * Copyright (C) 1999 David S. Miller (davem@redhat.com)
6 */
7
8#include <linux/kernel.h>
9#include <linux/types.h>
10#include <linux/mm.h>
11#include <linux/spinlock.h>
12#include <linux/slab.h>
13#include <linux/export.h>
14#include <linux/init.h>
15#include <linux/interrupt.h>
16#include <linux/of.h>
17#include <linux/of_platform.h>
18#include <linux/platform_device.h>
19#include <linux/numa.h>
20
21#include <asm/page.h>
22#include <asm/io.h>
23#include <asm/upa.h>
24#include <asm/cache.h>
25#include <asm/dma.h>
26#include <asm/irq.h>
27#include <asm/prom.h>
28#include <asm/oplib.h>
29#include <asm/starfire.h>
30
31#include "iommu_common.h"
32
33#define MAP_BASE ((u32)0xc0000000)
34
35/* Offsets from iommu_regs */
36#define SYSIO_IOMMUREG_BASE 0x2400UL
37#define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */
38#define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */
39#define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */
40#define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */
41#define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */
42#define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */
43#define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */
44#define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */
45
46#define IOMMU_DRAM_VALID (1UL << 30UL)
47
48/* Offsets from strbuf_regs */
49#define SYSIO_STRBUFREG_BASE 0x2800UL
50#define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */
51#define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */
52#define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */
53#define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */
54#define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */
55#define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */
56#define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */
57
58#define STRBUF_TAG_VALID 0x02UL
59
60/* Enable 64-bit DVMA mode for the given device. */
61void sbus_set_sbus64(struct device *dev, int bursts)
62{
63 struct iommu *iommu = dev->archdata.iommu;
64 struct platform_device *op = to_platform_device(dev);
65 const struct linux_prom_registers *regs;
66 unsigned long cfg_reg;
67 int slot;
68 u64 val;
69
70 regs = of_get_property(op->dev.of_node, "reg", NULL);
71 if (!regs) {
72 printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %pOF\n",
73 op->dev.of_node);
74 return;
75 }
76 slot = regs->which_io;
77
78 cfg_reg = iommu->write_complete_reg;
79 switch (slot) {
80 case 0:
81 cfg_reg += 0x20UL;
82 break;
83 case 1:
84 cfg_reg += 0x28UL;
85 break;
86 case 2:
87 cfg_reg += 0x30UL;
88 break;
89 case 3:
90 cfg_reg += 0x38UL;
91 break;
92 case 13:
93 cfg_reg += 0x40UL;
94 break;
95 case 14:
96 cfg_reg += 0x48UL;
97 break;
98 case 15:
99 cfg_reg += 0x50UL;
100 break;
101
102 default:
103 return;
104 }
105
106 val = upa_readq(cfg_reg);
107 if (val & (1UL << 14UL)) {
108 /* Extended transfer mode already enabled. */
109 return;
110 }
111
112 val |= (1UL << 14UL);
113
114 if (bursts & DMA_BURST8)
115 val |= (1UL << 1UL);
116 if (bursts & DMA_BURST16)
117 val |= (1UL << 2UL);
118 if (bursts & DMA_BURST32)
119 val |= (1UL << 3UL);
120 if (bursts & DMA_BURST64)
121 val |= (1UL << 4UL);
122 upa_writeq(val, cfg_reg);
123}
124EXPORT_SYMBOL(sbus_set_sbus64);
125
126/* INO number to IMAP register offset for SYSIO external IRQ's.
127 * This should conform to both Sunfire/Wildfire server and Fusion
128 * desktop designs.
129 */
130#define SYSIO_IMAP_SLOT0 0x2c00UL
131#define SYSIO_IMAP_SLOT1 0x2c08UL
132#define SYSIO_IMAP_SLOT2 0x2c10UL
133#define SYSIO_IMAP_SLOT3 0x2c18UL
134#define SYSIO_IMAP_SCSI 0x3000UL
135#define SYSIO_IMAP_ETH 0x3008UL
136#define SYSIO_IMAP_BPP 0x3010UL
137#define SYSIO_IMAP_AUDIO 0x3018UL
138#define SYSIO_IMAP_PFAIL 0x3020UL
139#define SYSIO_IMAP_KMS 0x3028UL
140#define SYSIO_IMAP_FLPY 0x3030UL
141#define SYSIO_IMAP_SHW 0x3038UL
142#define SYSIO_IMAP_KBD 0x3040UL
143#define SYSIO_IMAP_MS 0x3048UL
144#define SYSIO_IMAP_SER 0x3050UL
145#define SYSIO_IMAP_TIM0 0x3060UL
146#define SYSIO_IMAP_TIM1 0x3068UL
147#define SYSIO_IMAP_UE 0x3070UL
148#define SYSIO_IMAP_CE 0x3078UL
149#define SYSIO_IMAP_SBERR 0x3080UL
150#define SYSIO_IMAP_PMGMT 0x3088UL
151#define SYSIO_IMAP_GFX 0x3090UL
152#define SYSIO_IMAP_EUPA 0x3098UL
153
154#define bogon ((unsigned long) -1)
155static unsigned long sysio_irq_offsets[] = {
156 /* SBUS Slot 0 --> 3, level 1 --> 7 */
157 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
158 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
159 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
160 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
161 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
162 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
163 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
164 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
165
166 /* Onboard devices (not relevant/used on SunFire). */
167 SYSIO_IMAP_SCSI,
168 SYSIO_IMAP_ETH,
169 SYSIO_IMAP_BPP,
170 bogon,
171 SYSIO_IMAP_AUDIO,
172 SYSIO_IMAP_PFAIL,
173 bogon,
174 bogon,
175 SYSIO_IMAP_KMS,
176 SYSIO_IMAP_FLPY,
177 SYSIO_IMAP_SHW,
178 SYSIO_IMAP_KBD,
179 SYSIO_IMAP_MS,
180 SYSIO_IMAP_SER,
181 bogon,
182 bogon,
183 SYSIO_IMAP_TIM0,
184 SYSIO_IMAP_TIM1,
185 bogon,
186 bogon,
187 SYSIO_IMAP_UE,
188 SYSIO_IMAP_CE,
189 SYSIO_IMAP_SBERR,
190 SYSIO_IMAP_PMGMT,
191};
192
193#undef bogon
194
195#define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
196
197/* Convert Interrupt Mapping register pointer to associated
198 * Interrupt Clear register pointer, SYSIO specific version.
199 */
200#define SYSIO_ICLR_UNUSED0 0x3400UL
201#define SYSIO_ICLR_SLOT0 0x3408UL
202#define SYSIO_ICLR_SLOT1 0x3448UL
203#define SYSIO_ICLR_SLOT2 0x3488UL
204#define SYSIO_ICLR_SLOT3 0x34c8UL
205static unsigned long sysio_imap_to_iclr(unsigned long imap)
206{
207 unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
208 return imap + diff;
209}
210
211static unsigned int sbus_build_irq(struct platform_device *op, unsigned int ino)
212{
213 struct iommu *iommu = op->dev.archdata.iommu;
214 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
215 unsigned long imap, iclr;
216 int sbus_level = 0;
217
218 imap = sysio_irq_offsets[ino];
219 if (imap == ((unsigned long)-1)) {
220 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
221 ino);
222 prom_halt();
223 }
224 imap += reg_base;
225
226 /* SYSIO inconsistency. For external SLOTS, we have to select
227 * the right ICLR register based upon the lower SBUS irq level
228 * bits.
229 */
230 if (ino >= 0x20) {
231 iclr = sysio_imap_to_iclr(imap);
232 } else {
233 int sbus_slot = (ino & 0x18)>>3;
234
235 sbus_level = ino & 0x7;
236
237 switch(sbus_slot) {
238 case 0:
239 iclr = reg_base + SYSIO_ICLR_SLOT0;
240 break;
241 case 1:
242 iclr = reg_base + SYSIO_ICLR_SLOT1;
243 break;
244 case 2:
245 iclr = reg_base + SYSIO_ICLR_SLOT2;
246 break;
247 default:
248 case 3:
249 iclr = reg_base + SYSIO_ICLR_SLOT3;
250 break;
251 }
252
253 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
254 }
255 return build_irq(sbus_level, iclr, imap);
256}
257
258/* Error interrupt handling. */
259#define SYSIO_UE_AFSR 0x0030UL
260#define SYSIO_UE_AFAR 0x0038UL
261#define SYSIO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
262#define SYSIO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
263#define SYSIO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
264#define SYSIO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
265#define SYSIO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
266#define SYSIO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
267#define SYSIO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
268#define SYSIO_UEAFSR_DOFF 0x0000e00000000000UL /* Doubleword Offset */
269#define SYSIO_UEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
270#define SYSIO_UEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
271#define SYSIO_UEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
272static irqreturn_t sysio_ue_handler(int irq, void *dev_id)
273{
274 struct platform_device *op = dev_id;
275 struct iommu *iommu = op->dev.archdata.iommu;
276 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
277 unsigned long afsr_reg, afar_reg;
278 unsigned long afsr, afar, error_bits;
279 int reported, portid;
280
281 afsr_reg = reg_base + SYSIO_UE_AFSR;
282 afar_reg = reg_base + SYSIO_UE_AFAR;
283
284 /* Latch error status. */
285 afsr = upa_readq(afsr_reg);
286 afar = upa_readq(afar_reg);
287
288 /* Clear primary/secondary error status bits. */
289 error_bits = afsr &
290 (SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR |
291 SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR);
292 upa_writeq(error_bits, afsr_reg);
293
294 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
295
296 /* Log the error. */
297 printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]\n",
298 portid,
299 (((error_bits & SYSIO_UEAFSR_PPIO) ?
300 "PIO" :
301 ((error_bits & SYSIO_UEAFSR_PDRD) ?
302 "DVMA Read" :
303 ((error_bits & SYSIO_UEAFSR_PDWR) ?
304 "DVMA Write" : "???")))));
305 printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]\n",
306 portid,
307 (afsr & SYSIO_UEAFSR_DOFF) >> 45UL,
308 (afsr & SYSIO_UEAFSR_SIZE) >> 42UL,
309 (afsr & SYSIO_UEAFSR_MID) >> 37UL);
310 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
311 printk("SYSIO[%x]: Secondary UE errors [", portid);
312 reported = 0;
313 if (afsr & SYSIO_UEAFSR_SPIO) {
314 reported++;
315 printk("(PIO)");
316 }
317 if (afsr & SYSIO_UEAFSR_SDRD) {
318 reported++;
319 printk("(DVMA Read)");
320 }
321 if (afsr & SYSIO_UEAFSR_SDWR) {
322 reported++;
323 printk("(DVMA Write)");
324 }
325 if (!reported)
326 printk("(none)");
327 printk("]\n");
328
329 return IRQ_HANDLED;
330}
331
332#define SYSIO_CE_AFSR 0x0040UL
333#define SYSIO_CE_AFAR 0x0048UL
334#define SYSIO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
335#define SYSIO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
336#define SYSIO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
337#define SYSIO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO cause */
338#define SYSIO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
339#define SYSIO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
340#define SYSIO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
341#define SYSIO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
342#define SYSIO_CEAFSR_DOFF 0x0000e00000000000UL /* Double Offset */
343#define SYSIO_CEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
344#define SYSIO_CEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
345#define SYSIO_CEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
346static irqreturn_t sysio_ce_handler(int irq, void *dev_id)
347{
348 struct platform_device *op = dev_id;
349 struct iommu *iommu = op->dev.archdata.iommu;
350 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
351 unsigned long afsr_reg, afar_reg;
352 unsigned long afsr, afar, error_bits;
353 int reported, portid;
354
355 afsr_reg = reg_base + SYSIO_CE_AFSR;
356 afar_reg = reg_base + SYSIO_CE_AFAR;
357
358 /* Latch error status. */
359 afsr = upa_readq(afsr_reg);
360 afar = upa_readq(afar_reg);
361
362 /* Clear primary/secondary error status bits. */
363 error_bits = afsr &
364 (SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR |
365 SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR);
366 upa_writeq(error_bits, afsr_reg);
367
368 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
369
370 printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]\n",
371 portid,
372 (((error_bits & SYSIO_CEAFSR_PPIO) ?
373 "PIO" :
374 ((error_bits & SYSIO_CEAFSR_PDRD) ?
375 "DVMA Read" :
376 ((error_bits & SYSIO_CEAFSR_PDWR) ?
377 "DVMA Write" : "???")))));
378
379 /* XXX Use syndrome and afar to print out module string just like
380 * XXX UDB CE trap handler does... -DaveM
381 */
382 printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]\n",
383 portid,
384 (afsr & SYSIO_CEAFSR_DOFF) >> 45UL,
385 (afsr & SYSIO_CEAFSR_ESYND) >> 48UL,
386 (afsr & SYSIO_CEAFSR_SIZE) >> 42UL,
387 (afsr & SYSIO_CEAFSR_MID) >> 37UL);
388 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
389
390 printk("SYSIO[%x]: Secondary CE errors [", portid);
391 reported = 0;
392 if (afsr & SYSIO_CEAFSR_SPIO) {
393 reported++;
394 printk("(PIO)");
395 }
396 if (afsr & SYSIO_CEAFSR_SDRD) {
397 reported++;
398 printk("(DVMA Read)");
399 }
400 if (afsr & SYSIO_CEAFSR_SDWR) {
401 reported++;
402 printk("(DVMA Write)");
403 }
404 if (!reported)
405 printk("(none)");
406 printk("]\n");
407
408 return IRQ_HANDLED;
409}
410
411#define SYSIO_SBUS_AFSR 0x2010UL
412#define SYSIO_SBUS_AFAR 0x2018UL
413#define SYSIO_SBAFSR_PLE 0x8000000000000000UL /* Primary Late PIO Error */
414#define SYSIO_SBAFSR_PTO 0x4000000000000000UL /* Primary SBUS Timeout */
415#define SYSIO_SBAFSR_PBERR 0x2000000000000000UL /* Primary SBUS Error ACK */
416#define SYSIO_SBAFSR_SLE 0x1000000000000000UL /* Secondary Late PIO Error */
417#define SYSIO_SBAFSR_STO 0x0800000000000000UL /* Secondary SBUS Timeout */
418#define SYSIO_SBAFSR_SBERR 0x0400000000000000UL /* Secondary SBUS Error ACK */
419#define SYSIO_SBAFSR_RESV1 0x03ff000000000000UL /* Reserved */
420#define SYSIO_SBAFSR_RD 0x0000800000000000UL /* Primary was late PIO read */
421#define SYSIO_SBAFSR_RESV2 0x0000600000000000UL /* Reserved */
422#define SYSIO_SBAFSR_SIZE 0x00001c0000000000UL /* Size of transfer */
423#define SYSIO_SBAFSR_MID 0x000003e000000000UL /* MID causing the error */
424#define SYSIO_SBAFSR_RESV3 0x0000001fffffffffUL /* Reserved */
425static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id)
426{
427 struct platform_device *op = dev_id;
428 struct iommu *iommu = op->dev.archdata.iommu;
429 unsigned long afsr_reg, afar_reg, reg_base;
430 unsigned long afsr, afar, error_bits;
431 int reported, portid;
432
433 reg_base = iommu->write_complete_reg - 0x2000UL;
434 afsr_reg = reg_base + SYSIO_SBUS_AFSR;
435 afar_reg = reg_base + SYSIO_SBUS_AFAR;
436
437 afsr = upa_readq(afsr_reg);
438 afar = upa_readq(afar_reg);
439
440 /* Clear primary/secondary error status bits. */
441 error_bits = afsr &
442 (SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR |
443 SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR);
444 upa_writeq(error_bits, afsr_reg);
445
446 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
447
448 /* Log the error. */
449 printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)\n",
450 portid,
451 (((error_bits & SYSIO_SBAFSR_PLE) ?
452 "Late PIO Error" :
453 ((error_bits & SYSIO_SBAFSR_PTO) ?
454 "Time Out" :
455 ((error_bits & SYSIO_SBAFSR_PBERR) ?
456 "Error Ack" : "???")))),
457 (afsr & SYSIO_SBAFSR_RD) ? 1 : 0);
458 printk("SYSIO[%x]: size[%lx] MID[%lx]\n",
459 portid,
460 (afsr & SYSIO_SBAFSR_SIZE) >> 42UL,
461 (afsr & SYSIO_SBAFSR_MID) >> 37UL);
462 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
463 printk("SYSIO[%x]: Secondary SBUS errors [", portid);
464 reported = 0;
465 if (afsr & SYSIO_SBAFSR_SLE) {
466 reported++;
467 printk("(Late PIO Error)");
468 }
469 if (afsr & SYSIO_SBAFSR_STO) {
470 reported++;
471 printk("(Time Out)");
472 }
473 if (afsr & SYSIO_SBAFSR_SBERR) {
474 reported++;
475 printk("(Error Ack)");
476 }
477 if (!reported)
478 printk("(none)");
479 printk("]\n");
480
481 /* XXX check iommu/strbuf for further error status XXX */
482
483 return IRQ_HANDLED;
484}
485
486#define ECC_CONTROL 0x0020UL
487#define SYSIO_ECNTRL_ECCEN 0x8000000000000000UL /* Enable ECC Checking */
488#define SYSIO_ECNTRL_UEEN 0x4000000000000000UL /* Enable UE Interrupts */
489#define SYSIO_ECNTRL_CEEN 0x2000000000000000UL /* Enable CE Interrupts */
490
491#define SYSIO_UE_INO 0x34
492#define SYSIO_CE_INO 0x35
493#define SYSIO_SBUSERR_INO 0x36
494
495static void __init sysio_register_error_handlers(struct platform_device *op)
496{
497 struct iommu *iommu = op->dev.archdata.iommu;
498 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
499 unsigned int irq;
500 u64 control;
501 int portid;
502
503 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
504
505 irq = sbus_build_irq(op, SYSIO_UE_INO);
506 if (request_irq(irq, sysio_ue_handler, 0,
507 "SYSIO_UE", op) < 0) {
508 prom_printf("SYSIO[%x]: Cannot register UE interrupt.\n",
509 portid);
510 prom_halt();
511 }
512
513 irq = sbus_build_irq(op, SYSIO_CE_INO);
514 if (request_irq(irq, sysio_ce_handler, 0,
515 "SYSIO_CE", op) < 0) {
516 prom_printf("SYSIO[%x]: Cannot register CE interrupt.\n",
517 portid);
518 prom_halt();
519 }
520
521 irq = sbus_build_irq(op, SYSIO_SBUSERR_INO);
522 if (request_irq(irq, sysio_sbus_error_handler, 0,
523 "SYSIO_SBERR", op) < 0) {
524 prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.\n",
525 portid);
526 prom_halt();
527 }
528
529 /* Now turn the error interrupts on and also enable ECC checking. */
530 upa_writeq((SYSIO_ECNTRL_ECCEN |
531 SYSIO_ECNTRL_UEEN |
532 SYSIO_ECNTRL_CEEN),
533 reg_base + ECC_CONTROL);
534
535 control = upa_readq(iommu->write_complete_reg);
536 control |= 0x100UL; /* SBUS Error Interrupt Enable */
537 upa_writeq(control, iommu->write_complete_reg);
538}
539
540/* Boot time initialization. */
541static void __init sbus_iommu_init(struct platform_device *op)
542{
543 const struct linux_prom64_registers *pr;
544 struct device_node *dp = op->dev.of_node;
545 struct iommu *iommu;
546 struct strbuf *strbuf;
547 unsigned long regs, reg_base;
548 int i, portid;
549 u64 control;
550
551 pr = of_get_property(dp, "reg", NULL);
552 if (!pr) {
553 prom_printf("sbus_iommu_init: Cannot map SYSIO "
554 "control registers.\n");
555 prom_halt();
556 }
557 regs = pr->phys_addr;
558
559 iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC);
560 strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);
561 if (!iommu || !strbuf)
562 goto fatal_memory_error;
563
564 op->dev.archdata.iommu = iommu;
565 op->dev.archdata.stc = strbuf;
566 op->dev.archdata.numa_node = NUMA_NO_NODE;
567
568 reg_base = regs + SYSIO_IOMMUREG_BASE;
569 iommu->iommu_control = reg_base + IOMMU_CONTROL;
570 iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE;
571 iommu->iommu_flush = reg_base + IOMMU_FLUSH;
572 iommu->iommu_tags = iommu->iommu_control +
573 (IOMMU_TAGDIAG - IOMMU_CONTROL);
574
575 reg_base = regs + SYSIO_STRBUFREG_BASE;
576 strbuf->strbuf_control = reg_base + STRBUF_CONTROL;
577 strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH;
578 strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC;
579
580 strbuf->strbuf_enabled = 1;
581
582 strbuf->strbuf_flushflag = (volatile unsigned long *)
583 ((((unsigned long)&strbuf->__flushflag_buf[0])
584 + 63UL)
585 & ~63UL);
586 strbuf->strbuf_flushflag_pa = (unsigned long)
587 __pa(strbuf->strbuf_flushflag);
588
589 /* The SYSIO SBUS control register is used for dummy reads
590 * in order to ensure write completion.
591 */
592 iommu->write_complete_reg = regs + 0x2000UL;
593
594 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
595 printk(KERN_INFO "SYSIO: UPA portID %x, at %016lx\n",
596 portid, regs);
597
598 /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
599 if (iommu_table_init(iommu, IO_TSB_SIZE, MAP_BASE, 0xffffffff, -1))
600 goto fatal_memory_error;
601
602 control = upa_readq(iommu->iommu_control);
603 control = ((7UL << 16UL) |
604 (0UL << 2UL) |
605 (1UL << 1UL) |
606 (1UL << 0UL));
607 upa_writeq(control, iommu->iommu_control);
608
609 /* Clean out any cruft in the IOMMU using
610 * diagnostic accesses.
611 */
612 for (i = 0; i < 16; i++) {
613 unsigned long dram, tag;
614
615 dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL);
616 tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
617
618 dram += (unsigned long)i * 8UL;
619 tag += (unsigned long)i * 8UL;
620 upa_writeq(0, dram);
621 upa_writeq(0, tag);
622 }
623 upa_readq(iommu->write_complete_reg);
624
625 /* Give the TSB to SYSIO. */
626 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
627
628 /* Setup streaming buffer, DE=1 SB_EN=1 */
629 control = (1UL << 1UL) | (1UL << 0UL);
630 upa_writeq(control, strbuf->strbuf_control);
631
632 /* Clear out the tags using diagnostics. */
633 for (i = 0; i < 16; i++) {
634 unsigned long ptag, ltag;
635
636 ptag = strbuf->strbuf_control +
637 (STRBUF_PTAGDIAG - STRBUF_CONTROL);
638 ltag = strbuf->strbuf_control +
639 (STRBUF_LTAGDIAG - STRBUF_CONTROL);
640 ptag += (unsigned long)i * 8UL;
641 ltag += (unsigned long)i * 8UL;
642
643 upa_writeq(0UL, ptag);
644 upa_writeq(0UL, ltag);
645 }
646
647 /* Enable DVMA arbitration for all devices/slots. */
648 control = upa_readq(iommu->write_complete_reg);
649 control |= 0x3fUL;
650 upa_writeq(control, iommu->write_complete_reg);
651
652 /* Now some Xfire specific grot... */
653 if (this_is_starfire)
654 starfire_hookup(portid);
655
656 sysio_register_error_handlers(op);
657 return;
658
659fatal_memory_error:
660 kfree(iommu);
661 kfree(strbuf);
662 prom_printf("sbus_iommu_init: Fatal memory allocation error.\n");
663}
664
665static int __init sbus_init(void)
666{
667 struct device_node *dp;
668
669 for_each_node_by_name(dp, "sbus") {
670 struct platform_device *op = of_find_device_by_node(dp);
671
672 sbus_iommu_init(op);
673 of_propagate_archdata(op);
674 }
675
676 return 0;
677}
678
679subsys_initcall(sbus_init);