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