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tools, slub: Fix off-by-one buffer corruption after readlink() call
[linux-2.6/linux-mips.git] / arch / sparc / kernel / sbus.c
bloba161b9c77f055617553fb32a2e25fdac279922f0
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/init.h>
13 #include <linux/interrupt.h>
14 #include <linux/of.h>
15 #include <linux/of_device.h>
16
17 #include <asm/page.h>
18 #include <asm/io.h>
19 #include <asm/upa.h>
20 #include <asm/cache.h>
21 #include <asm/dma.h>
22 #include <asm/irq.h>
23 #include <asm/prom.h>
24 #include <asm/oplib.h>
25 #include <asm/starfire.h>
26
27 #include "iommu_common.h"
28
29 #define MAP_BASE ((u32)0xc0000000)
30
31 /* Offsets from iommu_regs */
32 #define SYSIO_IOMMUREG_BASE 0x2400UL
33 #define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */
34 #define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */
35 #define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */
36 #define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */
37 #define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */
38 #define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */
39 #define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */
40 #define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */
41
42 #define IOMMU_DRAM_VALID (1UL << 30UL)
43
44 /* Offsets from strbuf_regs */
45 #define SYSIO_STRBUFREG_BASE 0x2800UL
46 #define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */
47 #define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */
48 #define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */
49 #define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */
50 #define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */
51 #define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */
52 #define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */
53
54 #define STRBUF_TAG_VALID 0x02UL
55
56 /* Enable 64-bit DVMA mode for the given device. */
57 void sbus_set_sbus64(struct device *dev, int bursts)
58 {
59 struct iommu *iommu = dev->archdata.iommu;
60 struct platform_device *op = to_platform_device(dev);
61 const struct linux_prom_registers *regs;
62 unsigned long cfg_reg;
63 int slot;
64 u64 val;
65
66 regs = of_get_property(op->dev.of_node, "reg", NULL);
67 if (!regs) {
68 printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %s\n",
69 op->dev.of_node->full_name);
70 return;
71 }
72 slot = regs->which_io;
73
74 cfg_reg = iommu->write_complete_reg;
75 switch (slot) {
76 case 0:
77 cfg_reg += 0x20UL;
78 break;
79 case 1:
80 cfg_reg += 0x28UL;
81 break;
82 case 2:
83 cfg_reg += 0x30UL;
84 break;
85 case 3:
86 cfg_reg += 0x38UL;
87 break;
88 case 13:
89 cfg_reg += 0x40UL;
90 break;
91 case 14:
92 cfg_reg += 0x48UL;
93 break;
94 case 15:
95 cfg_reg += 0x50UL;
96 break;
97
98 default:
99 return;
100 }
101
102 val = upa_readq(cfg_reg);
103 if (val & (1UL << 14UL)) {
104 /* Extended transfer mode already enabled. */
105 return;
106 }
107
108 val |= (1UL << 14UL);
109
110 if (bursts & DMA_BURST8)
111 val |= (1UL << 1UL);
112 if (bursts & DMA_BURST16)
113 val |= (1UL << 2UL);
114 if (bursts & DMA_BURST32)
115 val |= (1UL << 3UL);
116 if (bursts & DMA_BURST64)
117 val |= (1UL << 4UL);
118 upa_writeq(val, cfg_reg);
119 }
120 EXPORT_SYMBOL(sbus_set_sbus64);
121
122 /* INO number to IMAP register offset for SYSIO external IRQ's.
123 * This should conform to both Sunfire/Wildfire server and Fusion
124 * desktop designs.
125 */
126 #define SYSIO_IMAP_SLOT0 0x2c00UL
127 #define SYSIO_IMAP_SLOT1 0x2c08UL
128 #define SYSIO_IMAP_SLOT2 0x2c10UL
129 #define SYSIO_IMAP_SLOT3 0x2c18UL
130 #define SYSIO_IMAP_SCSI 0x3000UL
131 #define SYSIO_IMAP_ETH 0x3008UL
132 #define SYSIO_IMAP_BPP 0x3010UL
133 #define SYSIO_IMAP_AUDIO 0x3018UL
134 #define SYSIO_IMAP_PFAIL 0x3020UL
135 #define SYSIO_IMAP_KMS 0x3028UL
136 #define SYSIO_IMAP_FLPY 0x3030UL
137 #define SYSIO_IMAP_SHW 0x3038UL
138 #define SYSIO_IMAP_KBD 0x3040UL
139 #define SYSIO_IMAP_MS 0x3048UL
140 #define SYSIO_IMAP_SER 0x3050UL
141 #define SYSIO_IMAP_TIM0 0x3060UL
142 #define SYSIO_IMAP_TIM1 0x3068UL
143 #define SYSIO_IMAP_UE 0x3070UL
144 #define SYSIO_IMAP_CE 0x3078UL
145 #define SYSIO_IMAP_SBERR 0x3080UL
146 #define SYSIO_IMAP_PMGMT 0x3088UL
147 #define SYSIO_IMAP_GFX 0x3090UL
148 #define SYSIO_IMAP_EUPA 0x3098UL
149
150 #define bogon ((unsigned long) -1)
151 static unsigned long sysio_irq_offsets[] = {
152 /* SBUS Slot 0 --> 3, level 1 --> 7 */
153 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
154 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
155 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
156 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
157 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
158 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
159 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
160 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
161
162 /* Onboard devices (not relevant/used on SunFire). */
163 SYSIO_IMAP_SCSI,
164 SYSIO_IMAP_ETH,
165 SYSIO_IMAP_BPP,
166 bogon,
167 SYSIO_IMAP_AUDIO,
168 SYSIO_IMAP_PFAIL,
169 bogon,
170 bogon,
171 SYSIO_IMAP_KMS,
172 SYSIO_IMAP_FLPY,
173 SYSIO_IMAP_SHW,
174 SYSIO_IMAP_KBD,
175 SYSIO_IMAP_MS,
176 SYSIO_IMAP_SER,
177 bogon,
178 bogon,
179 SYSIO_IMAP_TIM0,
180 SYSIO_IMAP_TIM1,
181 bogon,
182 bogon,
183 SYSIO_IMAP_UE,
184 SYSIO_IMAP_CE,
185 SYSIO_IMAP_SBERR,
186 SYSIO_IMAP_PMGMT,
187 };
188
189 #undef bogon
190
191 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
192
193 /* Convert Interrupt Mapping register pointer to associated
194 * Interrupt Clear register pointer, SYSIO specific version.
195 */
196 #define SYSIO_ICLR_UNUSED0 0x3400UL
197 #define SYSIO_ICLR_SLOT0 0x3408UL
198 #define SYSIO_ICLR_SLOT1 0x3448UL
199 #define SYSIO_ICLR_SLOT2 0x3488UL
200 #define SYSIO_ICLR_SLOT3 0x34c8UL
201 static unsigned long sysio_imap_to_iclr(unsigned long imap)
202 {
203 unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
204 return imap + diff;
205 }
206
207 static unsigned int sbus_build_irq(struct platform_device *op, unsigned int ino)
208 {
209 struct iommu *iommu = op->dev.archdata.iommu;
210 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
211 unsigned long imap, iclr;
212 int sbus_level = 0;
213
214 imap = sysio_irq_offsets[ino];
215 if (imap == ((unsigned long)-1)) {
216 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
217 ino);
218 prom_halt();
219 }
220 imap += reg_base;
221
222 /* SYSIO inconsistency. For external SLOTS, we have to select
223 * the right ICLR register based upon the lower SBUS irq level
224 * bits.
225 */
226 if (ino >= 0x20) {
227 iclr = sysio_imap_to_iclr(imap);
228 } else {
229 int sbus_slot = (ino & 0x18)>>3;
230
231 sbus_level = ino & 0x7;
232
233 switch(sbus_slot) {
234 case 0:
235 iclr = reg_base + SYSIO_ICLR_SLOT0;
236 break;
237 case 1:
238 iclr = reg_base + SYSIO_ICLR_SLOT1;
239 break;
240 case 2:
241 iclr = reg_base + SYSIO_ICLR_SLOT2;
242 break;
243 default:
244 case 3:
245 iclr = reg_base + SYSIO_ICLR_SLOT3;
246 break;
247 }
248
249 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
250 }
251 return build_irq(sbus_level, iclr, imap);
252 }
253
254 /* Error interrupt handling. */
255 #define SYSIO_UE_AFSR 0x0030UL
256 #define SYSIO_UE_AFAR 0x0038UL
257 #define SYSIO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
258 #define SYSIO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
259 #define SYSIO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
260 #define SYSIO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
261 #define SYSIO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
262 #define SYSIO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
263 #define SYSIO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
264 #define SYSIO_UEAFSR_DOFF 0x0000e00000000000UL /* Doubleword Offset */
265 #define SYSIO_UEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
266 #define SYSIO_UEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
267 #define SYSIO_UEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
268 static irqreturn_t sysio_ue_handler(int irq, void *dev_id)
269 {
270 struct platform_device *op = dev_id;
271 struct iommu *iommu = op->dev.archdata.iommu;
272 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
273 unsigned long afsr_reg, afar_reg;
274 unsigned long afsr, afar, error_bits;
275 int reported, portid;
276
277 afsr_reg = reg_base + SYSIO_UE_AFSR;
278 afar_reg = reg_base + SYSIO_UE_AFAR;
279
280 /* Latch error status. */
281 afsr = upa_readq(afsr_reg);
282 afar = upa_readq(afar_reg);
283
284 /* Clear primary/secondary error status bits. */
285 error_bits = afsr &
286 (SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR |
287 SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR);
288 upa_writeq(error_bits, afsr_reg);
289
290 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
291
292 /* Log the error. */
293 printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]\n",
294 portid,
295 (((error_bits & SYSIO_UEAFSR_PPIO) ?
296 "PIO" :
297 ((error_bits & SYSIO_UEAFSR_PDRD) ?
298 "DVMA Read" :
299 ((error_bits & SYSIO_UEAFSR_PDWR) ?
300 "DVMA Write" : "???")))));
301 printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]\n",
302 portid,
303 (afsr & SYSIO_UEAFSR_DOFF) >> 45UL,
304 (afsr & SYSIO_UEAFSR_SIZE) >> 42UL,
305 (afsr & SYSIO_UEAFSR_MID) >> 37UL);
306 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
307 printk("SYSIO[%x]: Secondary UE errors [", portid);
308 reported = 0;
309 if (afsr & SYSIO_UEAFSR_SPIO) {
310 reported++;
311 printk("(PIO)");
312 }
313 if (afsr & SYSIO_UEAFSR_SDRD) {
314 reported++;
315 printk("(DVMA Read)");
316 }
317 if (afsr & SYSIO_UEAFSR_SDWR) {
318 reported++;
319 printk("(DVMA Write)");
320 }
321 if (!reported)
322 printk("(none)");
323 printk("]\n");
324
325 return IRQ_HANDLED;
326 }
327
328 #define SYSIO_CE_AFSR 0x0040UL
329 #define SYSIO_CE_AFAR 0x0048UL
330 #define SYSIO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
331 #define SYSIO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
332 #define SYSIO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
333 #define SYSIO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO cause */
334 #define SYSIO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
335 #define SYSIO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
336 #define SYSIO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
337 #define SYSIO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
338 #define SYSIO_CEAFSR_DOFF 0x0000e00000000000UL /* Double Offset */
339 #define SYSIO_CEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
340 #define SYSIO_CEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
341 #define SYSIO_CEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
342 static irqreturn_t sysio_ce_handler(int irq, void *dev_id)
343 {
344 struct platform_device *op = dev_id;
345 struct iommu *iommu = op->dev.archdata.iommu;
346 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
347 unsigned long afsr_reg, afar_reg;
348 unsigned long afsr, afar, error_bits;
349 int reported, portid;
350
351 afsr_reg = reg_base + SYSIO_CE_AFSR;
352 afar_reg = reg_base + SYSIO_CE_AFAR;
353
354 /* Latch error status. */
355 afsr = upa_readq(afsr_reg);
356 afar = upa_readq(afar_reg);
357
358 /* Clear primary/secondary error status bits. */
359 error_bits = afsr &
360 (SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR |
361 SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR);
362 upa_writeq(error_bits, afsr_reg);
363
364 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
365
366 printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]\n",
367 portid,
368 (((error_bits & SYSIO_CEAFSR_PPIO) ?
369 "PIO" :
370 ((error_bits & SYSIO_CEAFSR_PDRD) ?
371 "DVMA Read" :
372 ((error_bits & SYSIO_CEAFSR_PDWR) ?
373 "DVMA Write" : "???")))));
374
375 /* XXX Use syndrome and afar to print out module string just like
376 * XXX UDB CE trap handler does... -DaveM
377 */
378 printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]\n",
379 portid,
380 (afsr & SYSIO_CEAFSR_DOFF) >> 45UL,
381 (afsr & SYSIO_CEAFSR_ESYND) >> 48UL,
382 (afsr & SYSIO_CEAFSR_SIZE) >> 42UL,
383 (afsr & SYSIO_CEAFSR_MID) >> 37UL);
384 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
385
386 printk("SYSIO[%x]: Secondary CE errors [", portid);
387 reported = 0;
388 if (afsr & SYSIO_CEAFSR_SPIO) {
389 reported++;
390 printk("(PIO)");
391 }
392 if (afsr & SYSIO_CEAFSR_SDRD) {
393 reported++;
394 printk("(DVMA Read)");
395 }
396 if (afsr & SYSIO_CEAFSR_SDWR) {
397 reported++;
398 printk("(DVMA Write)");
399 }
400 if (!reported)
401 printk("(none)");
402 printk("]\n");
403
404 return IRQ_HANDLED;
405 }
406
407 #define SYSIO_SBUS_AFSR 0x2010UL
408 #define SYSIO_SBUS_AFAR 0x2018UL
409 #define SYSIO_SBAFSR_PLE 0x8000000000000000UL /* Primary Late PIO Error */
410 #define SYSIO_SBAFSR_PTO 0x4000000000000000UL /* Primary SBUS Timeout */
411 #define SYSIO_SBAFSR_PBERR 0x2000000000000000UL /* Primary SBUS Error ACK */
412 #define SYSIO_SBAFSR_SLE 0x1000000000000000UL /* Secondary Late PIO Error */
413 #define SYSIO_SBAFSR_STO 0x0800000000000000UL /* Secondary SBUS Timeout */
414 #define SYSIO_SBAFSR_SBERR 0x0400000000000000UL /* Secondary SBUS Error ACK */
415 #define SYSIO_SBAFSR_RESV1 0x03ff000000000000UL /* Reserved */
416 #define SYSIO_SBAFSR_RD 0x0000800000000000UL /* Primary was late PIO read */
417 #define SYSIO_SBAFSR_RESV2 0x0000600000000000UL /* Reserved */
418 #define SYSIO_SBAFSR_SIZE 0x00001c0000000000UL /* Size of transfer */
419 #define SYSIO_SBAFSR_MID 0x000003e000000000UL /* MID causing the error */
420 #define SYSIO_SBAFSR_RESV3 0x0000001fffffffffUL /* Reserved */
421 static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id)
422 {
423 struct platform_device *op = dev_id;
424 struct iommu *iommu = op->dev.archdata.iommu;
425 unsigned long afsr_reg, afar_reg, reg_base;
426 unsigned long afsr, afar, error_bits;
427 int reported, portid;
428
429 reg_base = iommu->write_complete_reg - 0x2000UL;
430 afsr_reg = reg_base + SYSIO_SBUS_AFSR;
431 afar_reg = reg_base + SYSIO_SBUS_AFAR;
432
433 afsr = upa_readq(afsr_reg);
434 afar = upa_readq(afar_reg);
435
436 /* Clear primary/secondary error status bits. */
437 error_bits = afsr &
438 (SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR |
439 SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR);
440 upa_writeq(error_bits, afsr_reg);
441
442 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
443
444 /* Log the error. */
445 printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)\n",
446 portid,
447 (((error_bits & SYSIO_SBAFSR_PLE) ?
448 "Late PIO Error" :
449 ((error_bits & SYSIO_SBAFSR_PTO) ?
450 "Time Out" :
451 ((error_bits & SYSIO_SBAFSR_PBERR) ?
452 "Error Ack" : "???")))),
453 (afsr & SYSIO_SBAFSR_RD) ? 1 : 0);
454 printk("SYSIO[%x]: size[%lx] MID[%lx]\n",
455 portid,
456 (afsr & SYSIO_SBAFSR_SIZE) >> 42UL,
457 (afsr & SYSIO_SBAFSR_MID) >> 37UL);
458 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
459 printk("SYSIO[%x]: Secondary SBUS errors [", portid);
460 reported = 0;
461 if (afsr & SYSIO_SBAFSR_SLE) {
462 reported++;
463 printk("(Late PIO Error)");
464 }
465 if (afsr & SYSIO_SBAFSR_STO) {
466 reported++;
467 printk("(Time Out)");
468 }
469 if (afsr & SYSIO_SBAFSR_SBERR) {
470 reported++;
471 printk("(Error Ack)");
472 }
473 if (!reported)
474 printk("(none)");
475 printk("]\n");
476
477 /* XXX check iommu/strbuf for further error status XXX */
478
479 return IRQ_HANDLED;
480 }
481
482 #define ECC_CONTROL 0x0020UL
483 #define SYSIO_ECNTRL_ECCEN 0x8000000000000000UL /* Enable ECC Checking */
484 #define SYSIO_ECNTRL_UEEN 0x4000000000000000UL /* Enable UE Interrupts */
485 #define SYSIO_ECNTRL_CEEN 0x2000000000000000UL /* Enable CE Interrupts */
486
487 #define SYSIO_UE_INO 0x34
488 #define SYSIO_CE_INO 0x35
489 #define SYSIO_SBUSERR_INO 0x36
490
491 static void __init sysio_register_error_handlers(struct platform_device *op)
492 {
493 struct iommu *iommu = op->dev.archdata.iommu;
494 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
495 unsigned int irq;
496 u64 control;
497 int portid;
498
499 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
500
501 irq = sbus_build_irq(op, SYSIO_UE_INO);
502 if (request_irq(irq, sysio_ue_handler, 0,
503 "SYSIO_UE", op) < 0) {
504 prom_printf("SYSIO[%x]: Cannot register UE interrupt.\n",
505 portid);
506 prom_halt();
507 }
508
509 irq = sbus_build_irq(op, SYSIO_CE_INO);
510 if (request_irq(irq, sysio_ce_handler, 0,
511 "SYSIO_CE", op) < 0) {
512 prom_printf("SYSIO[%x]: Cannot register CE interrupt.\n",
513 portid);
514 prom_halt();
515 }
516
517 irq = sbus_build_irq(op, SYSIO_SBUSERR_INO);
518 if (request_irq(irq, sysio_sbus_error_handler, 0,
519 "SYSIO_SBERR", op) < 0) {
520 prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.\n",
521 portid);
522 prom_halt();
523 }
524
525 /* Now turn the error interrupts on and also enable ECC checking. */
526 upa_writeq((SYSIO_ECNTRL_ECCEN |
527 SYSIO_ECNTRL_UEEN |
528 SYSIO_ECNTRL_CEEN),
529 reg_base + ECC_CONTROL);
530
531 control = upa_readq(iommu->write_complete_reg);
532 control |= 0x100UL; /* SBUS Error Interrupt Enable */
533 upa_writeq(control, iommu->write_complete_reg);
534 }
535
536 /* Boot time initialization. */
537 static void __init sbus_iommu_init(struct platform_device *op)
538 {
539 const struct linux_prom64_registers *pr;
540 struct device_node *dp = op->dev.of_node;
541 struct iommu *iommu;
542 struct strbuf *strbuf;
543 unsigned long regs, reg_base;
544 int i, portid;
545 u64 control;
546
547 pr = of_get_property(dp, "reg", NULL);
548 if (!pr) {
549 prom_printf("sbus_iommu_init: Cannot map SYSIO "
550 "control registers.\n");
551 prom_halt();
552 }
553 regs = pr->phys_addr;
554
555 iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC);
556 if (!iommu)
557 goto fatal_memory_error;
558 strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);
559 if (!strbuf)
560 goto fatal_memory_error;
561
562 op->dev.archdata.iommu = iommu;
563 op->dev.archdata.stc = strbuf;
564 op->dev.archdata.numa_node = -1;
565
566 reg_base = regs + SYSIO_IOMMUREG_BASE;
567 iommu->iommu_control = reg_base + IOMMU_CONTROL;
568 iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE;
569 iommu->iommu_flush = reg_base + IOMMU_FLUSH;
570 iommu->iommu_tags = iommu->iommu_control +
571 (IOMMU_TAGDIAG - IOMMU_CONTROL);
572
573 reg_base = regs + SYSIO_STRBUFREG_BASE;
574 strbuf->strbuf_control = reg_base + STRBUF_CONTROL;
575 strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH;
576 strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC;
577
578 strbuf->strbuf_enabled = 1;
579
580 strbuf->strbuf_flushflag = (volatile unsigned long *)
581 ((((unsigned long)&strbuf->__flushflag_buf[0])
582 + 63UL)
583 & ~63UL);
584 strbuf->strbuf_flushflag_pa = (unsigned long)
585 __pa(strbuf->strbuf_flushflag);
586
587 /* The SYSIO SBUS control register is used for dummy reads
588 * in order to ensure write completion.
589 */
590 iommu->write_complete_reg = regs + 0x2000UL;
591
592 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
593 printk(KERN_INFO "SYSIO: UPA portID %x, at %016lx\n",
594 portid, regs);
595
596 /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
597 if (iommu_table_init(iommu, IO_TSB_SIZE, MAP_BASE, 0xffffffff, -1))
598 goto fatal_memory_error;
599
600 control = upa_readq(iommu->iommu_control);
601 control = ((7UL << 16UL) |
602 (0UL << 2UL) |
603 (1UL << 1UL) |
604 (1UL << 0UL));
605 upa_writeq(control, iommu->iommu_control);
606
607 /* Clean out any cruft in the IOMMU using
608 * diagnostic accesses.
609 */
610 for (i = 0; i < 16; i++) {
611 unsigned long dram, tag;
612
613 dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL);
614 tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
615
616 dram += (unsigned long)i * 8UL;
617 tag += (unsigned long)i * 8UL;
618 upa_writeq(0, dram);
619 upa_writeq(0, tag);
620 }
621 upa_readq(iommu->write_complete_reg);
622
623 /* Give the TSB to SYSIO. */
624 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
625
626 /* Setup streaming buffer, DE=1 SB_EN=1 */
627 control = (1UL << 1UL) | (1UL << 0UL);
628 upa_writeq(control, strbuf->strbuf_control);
629
630 /* Clear out the tags using diagnostics. */
631 for (i = 0; i < 16; i++) {
632 unsigned long ptag, ltag;
633
634 ptag = strbuf->strbuf_control +
635 (STRBUF_PTAGDIAG - STRBUF_CONTROL);
636 ltag = strbuf->strbuf_control +
637 (STRBUF_LTAGDIAG - STRBUF_CONTROL);
638 ptag += (unsigned long)i * 8UL;
639 ltag += (unsigned long)i * 8UL;
640
641 upa_writeq(0UL, ptag);
642 upa_writeq(0UL, ltag);
643 }
644
645 /* Enable DVMA arbitration for all devices/slots. */
646 control = upa_readq(iommu->write_complete_reg);
647 control |= 0x3fUL;
648 upa_writeq(control, iommu->write_complete_reg);
649
650 /* Now some Xfire specific grot... */
651 if (this_is_starfire)
652 starfire_hookup(portid);
653
654 sysio_register_error_handlers(op);
655 return;
656
657 fatal_memory_error:
658 prom_printf("sbus_iommu_init: Fatal memory allocation error.\n");
659 }
660
661 static int __init sbus_init(void)
662 {
663 struct device_node *dp;
664
665 for_each_node_by_name(dp, "sbus") {
666 struct platform_device *op = of_find_device_by_node(dp);
667
668 sbus_iommu_init(op);
669 of_propagate_archdata(op);
670 }
671
672 return 0;
673 }
674
675 subsys_initcall(sbus_init);
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