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Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / arch / sparc / kernel / sbus.c
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. */
58 void 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 }
121 EXPORT_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)
152 static 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
202 static 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
208 static 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 */
269 static 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 */
343 static 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 */
422 static 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
492 static 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. */
538 static 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 strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);
558 if (!iommu || !strbuf)
559 goto fatal_memory_error;
560
561 op->dev.archdata.iommu = iommu;
562 op->dev.archdata.stc = strbuf;
563 op->dev.archdata.numa_node = -1;
564
565 reg_base = regs + SYSIO_IOMMUREG_BASE;
566 iommu->iommu_control = reg_base + IOMMU_CONTROL;
567 iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE;
568 iommu->iommu_flush = reg_base + IOMMU_FLUSH;
569 iommu->iommu_tags = iommu->iommu_control +
570 (IOMMU_TAGDIAG - IOMMU_CONTROL);
571
572 reg_base = regs + SYSIO_STRBUFREG_BASE;
573 strbuf->strbuf_control = reg_base + STRBUF_CONTROL;
574 strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH;
575 strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC;
576
577 strbuf->strbuf_enabled = 1;
578
579 strbuf->strbuf_flushflag = (volatile unsigned long *)
580 ((((unsigned long)&strbuf->__flushflag_buf[0])
581 + 63UL)
582 & ~63UL);
583 strbuf->strbuf_flushflag_pa = (unsigned long)
584 __pa(strbuf->strbuf_flushflag);
585
586 /* The SYSIO SBUS control register is used for dummy reads
587 * in order to ensure write completion.
588 */
589 iommu->write_complete_reg = regs + 0x2000UL;
590
591 portid = of_getintprop_default(op->dev.of_node, "portid", -1);
592 printk(KERN_INFO "SYSIO: UPA portID %x, at %016lx\n",
593 portid, regs);
594
595 /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
596 if (iommu_table_init(iommu, IO_TSB_SIZE, MAP_BASE, 0xffffffff, -1))
597 goto fatal_memory_error;
598
599 control = upa_readq(iommu->iommu_control);
600 control = ((7UL << 16UL) |
601 (0UL << 2UL) |
602 (1UL << 1UL) |
603 (1UL << 0UL));
604 upa_writeq(control, iommu->iommu_control);
605
606 /* Clean out any cruft in the IOMMU using
607 * diagnostic accesses.
608 */
609 for (i = 0; i < 16; i++) {
610 unsigned long dram, tag;
611
612 dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL);
613 tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
614
615 dram += (unsigned long)i * 8UL;
616 tag += (unsigned long)i * 8UL;
617 upa_writeq(0, dram);
618 upa_writeq(0, tag);
619 }
620 upa_readq(iommu->write_complete_reg);
621
622 /* Give the TSB to SYSIO. */
623 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
624
625 /* Setup streaming buffer, DE=1 SB_EN=1 */
626 control = (1UL << 1UL) | (1UL << 0UL);
627 upa_writeq(control, strbuf->strbuf_control);
628
629 /* Clear out the tags using diagnostics. */
630 for (i = 0; i < 16; i++) {
631 unsigned long ptag, ltag;
632
633 ptag = strbuf->strbuf_control +
634 (STRBUF_PTAGDIAG - STRBUF_CONTROL);
635 ltag = strbuf->strbuf_control +
636 (STRBUF_LTAGDIAG - STRBUF_CONTROL);
637 ptag += (unsigned long)i * 8UL;
638 ltag += (unsigned long)i * 8UL;
639
640 upa_writeq(0UL, ptag);
641 upa_writeq(0UL, ltag);
642 }
643
644 /* Enable DVMA arbitration for all devices/slots. */
645 control = upa_readq(iommu->write_complete_reg);
646 control |= 0x3fUL;
647 upa_writeq(control, iommu->write_complete_reg);
648
649 /* Now some Xfire specific grot... */
650 if (this_is_starfire)
651 starfire_hookup(portid);
652
653 sysio_register_error_handlers(op);
654 return;
655
656 fatal_memory_error:
657 kfree(iommu);
658 kfree(strbuf);
659 prom_printf("sbus_iommu_init: Fatal memory allocation error.\n");
660 }
661
662 static 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
676 subsys_initcall(sbus_init);
Linux kernel - Deliverables
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