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Arnd Bergmann67207b92005-11-15 15:53:48 -05001/*
2 * Low-level SPU handling
3 *
4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
5 *
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
Arnd Bergmann3b3d22c2005-12-05 22:52:24 -050023#undef DEBUG
Arnd Bergmann67207b92005-11-15 15:53:48 -050024
25#include <linux/interrupt.h>
26#include <linux/list.h>
27#include <linux/module.h>
28#include <linux/poll.h>
29#include <linux/ptrace.h>
30#include <linux/slab.h>
31#include <linux/wait.h>
32
33#include <asm/io.h>
34#include <asm/prom.h>
Ingo Molnar14cc3e22006-03-26 01:37:14 -080035#include <linux/mutex.h>
Arnd Bergmann67207b92005-11-15 15:53:48 -050036#include <asm/spu.h>
37#include <asm/mmu_context.h>
38
39#include "interrupt.h"
40
41static int __spu_trap_invalid_dma(struct spu *spu)
42{
43 pr_debug("%s\n", __FUNCTION__);
44 force_sig(SIGBUS, /* info, */ current);
45 return 0;
46}
47
48static int __spu_trap_dma_align(struct spu *spu)
49{
50 pr_debug("%s\n", __FUNCTION__);
51 force_sig(SIGBUS, /* info, */ current);
52 return 0;
53}
54
55static int __spu_trap_error(struct spu *spu)
56{
57 pr_debug("%s\n", __FUNCTION__);
58 force_sig(SIGILL, /* info, */ current);
59 return 0;
60}
61
62static void spu_restart_dma(struct spu *spu)
63{
64 struct spu_priv2 __iomem *priv2 = spu->priv2;
Mark Nutter5473af02005-11-15 15:53:49 -050065
Arnd Bergmann8837d922006-01-04 20:31:28 +010066 if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags))
Mark Nutter5473af02005-11-15 15:53:49 -050067 out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
Arnd Bergmann67207b92005-11-15 15:53:48 -050068}
69
70static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
71{
Arnd Bergmann8b3d6662005-11-15 15:53:52 -050072 struct spu_priv2 __iomem *priv2 = spu->priv2;
73 struct mm_struct *mm = spu->mm;
74 u64 esid, vsid;
Arnd Bergmann67207b92005-11-15 15:53:48 -050075
76 pr_debug("%s\n", __FUNCTION__);
77
Arnd Bergmann8837d922006-01-04 20:31:28 +010078 if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
Arnd Bergmann8b3d6662005-11-15 15:53:52 -050079 /* SLBs are pre-loaded for context switch, so
80 * we should never get here!
81 */
Mark Nutter5473af02005-11-15 15:53:49 -050082 printk("%s: invalid access during switch!\n", __func__);
83 return 1;
84 }
Arnd Bergmann8b3d6662005-11-15 15:53:52 -050085 if (!mm || (REGION_ID(ea) != USER_REGION_ID)) {
86 /* Future: support kernel segments so that drivers
87 * can use SPUs.
88 */
Arnd Bergmann67207b92005-11-15 15:53:48 -050089 pr_debug("invalid region access at %016lx\n", ea);
90 return 1;
91 }
92
Arnd Bergmann8b3d6662005-11-15 15:53:52 -050093 esid = (ea & ESID_MASK) | SLB_ESID_V;
94 vsid = (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT) | SLB_VSID_USER;
95 if (in_hugepage_area(mm->context, ea))
96 vsid |= SLB_VSID_L;
Arnd Bergmann67207b92005-11-15 15:53:48 -050097
Arnd Bergmann8b3d6662005-11-15 15:53:52 -050098 out_be64(&priv2->slb_index_W, spu->slb_replace);
99 out_be64(&priv2->slb_vsid_RW, vsid);
100 out_be64(&priv2->slb_esid_RW, esid);
101
102 spu->slb_replace++;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500103 if (spu->slb_replace >= 8)
104 spu->slb_replace = 0;
105
Arnd Bergmann67207b92005-11-15 15:53:48 -0500106 spu_restart_dma(spu);
107
Arnd Bergmann67207b92005-11-15 15:53:48 -0500108 return 0;
109}
110
Mark Nutter5473af02005-11-15 15:53:49 -0500111extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500112static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
Arnd Bergmann67207b92005-11-15 15:53:48 -0500113{
Arnd Bergmann67207b92005-11-15 15:53:48 -0500114 pr_debug("%s\n", __FUNCTION__);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500115
Mark Nutter5473af02005-11-15 15:53:49 -0500116 /* Handle kernel space hash faults immediately.
117 User hash faults need to be deferred to process context. */
118 if ((dsisr & MFC_DSISR_PTE_NOT_FOUND)
119 && REGION_ID(ea) != USER_REGION_ID
120 && hash_page(ea, _PAGE_PRESENT, 0x300) == 0) {
121 spu_restart_dma(spu);
122 return 0;
123 }
Arnd Bergmann67207b92005-11-15 15:53:48 -0500124
Arnd Bergmann8837d922006-01-04 20:31:28 +0100125 if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
Mark Nutter5473af02005-11-15 15:53:49 -0500126 printk("%s: invalid access during switch!\n", __func__);
127 return 1;
128 }
129
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500130 spu->dar = ea;
131 spu->dsisr = dsisr;
132 mb();
Arnd Bergmann51104592005-12-05 22:52:25 -0500133 if (spu->stop_callback)
134 spu->stop_callback(spu);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500135 return 0;
136}
137
138static int __spu_trap_mailbox(struct spu *spu)
139{
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500140 if (spu->ibox_callback)
141 spu->ibox_callback(spu);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500142
143 /* atomically disable SPU mailbox interrupts */
144 spin_lock(&spu->register_lock);
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100145 spu_int_mask_and(spu, 2, ~0x1);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500146 spin_unlock(&spu->register_lock);
147 return 0;
148}
149
150static int __spu_trap_stop(struct spu *spu)
151{
152 pr_debug("%s\n", __FUNCTION__);
153 spu->stop_code = in_be32(&spu->problem->spu_status_R);
Arnd Bergmann51104592005-12-05 22:52:25 -0500154 if (spu->stop_callback)
155 spu->stop_callback(spu);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500156 return 0;
157}
158
159static int __spu_trap_halt(struct spu *spu)
160{
161 pr_debug("%s\n", __FUNCTION__);
162 spu->stop_code = in_be32(&spu->problem->spu_status_R);
Arnd Bergmann51104592005-12-05 22:52:25 -0500163 if (spu->stop_callback)
164 spu->stop_callback(spu);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500165 return 0;
166}
167
168static int __spu_trap_tag_group(struct spu *spu)
169{
170 pr_debug("%s\n", __FUNCTION__);
171 /* wake_up(&spu->dma_wq); */
172 return 0;
173}
174
175static int __spu_trap_spubox(struct spu *spu)
176{
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500177 if (spu->wbox_callback)
178 spu->wbox_callback(spu);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500179
180 /* atomically disable SPU mailbox interrupts */
181 spin_lock(&spu->register_lock);
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100182 spu_int_mask_and(spu, 2, ~0x10);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500183 spin_unlock(&spu->register_lock);
184 return 0;
185}
186
187static irqreturn_t
188spu_irq_class_0(int irq, void *data, struct pt_regs *regs)
189{
190 struct spu *spu;
191
192 spu = data;
193 spu->class_0_pending = 1;
Arnd Bergmann51104592005-12-05 22:52:25 -0500194 if (spu->stop_callback)
195 spu->stop_callback(spu);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500196
197 return IRQ_HANDLED;
198}
199
Arnd Bergmann51104592005-12-05 22:52:25 -0500200int
Arnd Bergmann67207b92005-11-15 15:53:48 -0500201spu_irq_class_0_bottom(struct spu *spu)
202{
Arnd Bergmann3a843d72005-12-05 22:52:27 -0500203 unsigned long stat, mask;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500204
205 spu->class_0_pending = 0;
206
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100207 mask = spu_int_mask_get(spu, 0);
208 stat = spu_int_stat_get(spu, 0);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500209
Arnd Bergmann3a843d72005-12-05 22:52:27 -0500210 stat &= mask;
211
Arnd Bergmann67207b92005-11-15 15:53:48 -0500212 if (stat & 1) /* invalid MFC DMA */
213 __spu_trap_invalid_dma(spu);
214
215 if (stat & 2) /* invalid DMA alignment */
216 __spu_trap_dma_align(spu);
217
218 if (stat & 4) /* error on SPU */
219 __spu_trap_error(spu);
220
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100221 spu_int_stat_clear(spu, 0, stat);
Arnd Bergmann51104592005-12-05 22:52:25 -0500222
223 return (stat & 0x7) ? -EIO : 0;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500224}
Arnd Bergmann51104592005-12-05 22:52:25 -0500225EXPORT_SYMBOL_GPL(spu_irq_class_0_bottom);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500226
227static irqreturn_t
228spu_irq_class_1(int irq, void *data, struct pt_regs *regs)
229{
230 struct spu *spu;
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500231 unsigned long stat, mask, dar, dsisr;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500232
233 spu = data;
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500234
235 /* atomically read & clear class1 status. */
236 spin_lock(&spu->register_lock);
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100237 mask = spu_int_mask_get(spu, 1);
238 stat = spu_int_stat_get(spu, 1) & mask;
239 dar = spu_mfc_dar_get(spu);
240 dsisr = spu_mfc_dsisr_get(spu);
Arnd Bergmann38307342005-12-09 19:04:18 +0100241 if (stat & 2) /* mapping fault */
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100242 spu_mfc_dsisr_set(spu, 0ul);
243 spu_int_stat_clear(spu, 1, stat);
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500244 spin_unlock(&spu->register_lock);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500245
246 if (stat & 1) /* segment fault */
247 __spu_trap_data_seg(spu, dar);
248
249 if (stat & 2) { /* mapping fault */
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500250 __spu_trap_data_map(spu, dar, dsisr);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500251 }
252
253 if (stat & 4) /* ls compare & suspend on get */
254 ;
255
256 if (stat & 8) /* ls compare & suspend on put */
257 ;
258
Arnd Bergmann67207b92005-11-15 15:53:48 -0500259 return stat ? IRQ_HANDLED : IRQ_NONE;
260}
Arnd Bergmann51104592005-12-05 22:52:25 -0500261EXPORT_SYMBOL_GPL(spu_irq_class_1_bottom);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500262
263static irqreturn_t
264spu_irq_class_2(int irq, void *data, struct pt_regs *regs)
265{
266 struct spu *spu;
267 unsigned long stat;
Arnd Bergmann3a843d72005-12-05 22:52:27 -0500268 unsigned long mask;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500269
270 spu = data;
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100271 stat = spu_int_stat_get(spu, 2);
272 mask = spu_int_mask_get(spu, 2);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500273
Arnd Bergmann3a843d72005-12-05 22:52:27 -0500274 pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500275
Arnd Bergmann3a843d72005-12-05 22:52:27 -0500276 stat &= mask;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500277
278 if (stat & 1) /* PPC core mailbox */
279 __spu_trap_mailbox(spu);
280
281 if (stat & 2) /* SPU stop-and-signal */
282 __spu_trap_stop(spu);
283
284 if (stat & 4) /* SPU halted */
285 __spu_trap_halt(spu);
286
287 if (stat & 8) /* DMA tag group complete */
288 __spu_trap_tag_group(spu);
289
290 if (stat & 0x10) /* SPU mailbox threshold */
291 __spu_trap_spubox(spu);
292
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100293 spu_int_stat_clear(spu, 2, stat);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500294 return stat ? IRQ_HANDLED : IRQ_NONE;
295}
296
297static int
298spu_request_irqs(struct spu *spu)
299{
300 int ret;
301 int irq_base;
302
303 irq_base = IIC_NODE_STRIDE * spu->node + IIC_SPE_OFFSET;
304
305 snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0", spu->number);
306 ret = request_irq(irq_base + spu->isrc,
307 spu_irq_class_0, 0, spu->irq_c0, spu);
308 if (ret)
309 goto out;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500310
311 snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1", spu->number);
312 ret = request_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc,
313 spu_irq_class_1, 0, spu->irq_c1, spu);
314 if (ret)
315 goto out1;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500316
317 snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2", spu->number);
318 ret = request_irq(irq_base + 2*IIC_CLASS_STRIDE + spu->isrc,
319 spu_irq_class_2, 0, spu->irq_c2, spu);
320 if (ret)
321 goto out2;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500322 goto out;
323
324out2:
325 free_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc, spu);
326out1:
327 free_irq(irq_base + spu->isrc, spu);
328out:
329 return ret;
330}
331
332static void
333spu_free_irqs(struct spu *spu)
334{
335 int irq_base;
336
337 irq_base = IIC_NODE_STRIDE * spu->node + IIC_SPE_OFFSET;
338
339 free_irq(irq_base + spu->isrc, spu);
340 free_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc, spu);
341 free_irq(irq_base + 2*IIC_CLASS_STRIDE + spu->isrc, spu);
342}
343
344static LIST_HEAD(spu_list);
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800345static DEFINE_MUTEX(spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500346
347static void spu_init_channels(struct spu *spu)
348{
349 static const struct {
350 unsigned channel;
351 unsigned count;
352 } zero_list[] = {
353 { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, },
354 { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, },
355 }, count_list[] = {
356 { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, },
357 { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, },
358 { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, },
359 };
Arnd Bergmann6ff730c2006-01-04 20:31:31 +0100360 struct spu_priv2 __iomem *priv2;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500361 int i;
362
363 priv2 = spu->priv2;
364
365 /* initialize all channel data to zero */
366 for (i = 0; i < ARRAY_SIZE(zero_list); i++) {
367 int count;
368
369 out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel);
370 for (count = 0; count < zero_list[i].count; count++)
371 out_be64(&priv2->spu_chnldata_RW, 0);
372 }
373
374 /* initialize channel counts to meaningful values */
375 for (i = 0; i < ARRAY_SIZE(count_list); i++) {
376 out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel);
377 out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count);
378 }
379}
380
Arnd Bergmann67207b92005-11-15 15:53:48 -0500381struct spu *spu_alloc(void)
382{
383 struct spu *spu;
384
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800385 mutex_lock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500386 if (!list_empty(&spu_list)) {
387 spu = list_entry(spu_list.next, struct spu, list);
388 list_del_init(&spu->list);
389 pr_debug("Got SPU %x %d\n", spu->isrc, spu->number);
390 } else {
391 pr_debug("No SPU left\n");
392 spu = NULL;
393 }
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800394 mutex_unlock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500395
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100396 if (spu)
Arnd Bergmann67207b92005-11-15 15:53:48 -0500397 spu_init_channels(spu);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500398
399 return spu;
400}
Arnd Bergmann39c73c32005-12-05 22:52:21 -0500401EXPORT_SYMBOL_GPL(spu_alloc);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500402
403void spu_free(struct spu *spu)
404{
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800405 mutex_lock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500406 list_add_tail(&spu->list, &spu_list);
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800407 mutex_unlock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500408}
Arnd Bergmann39c73c32005-12-05 22:52:21 -0500409EXPORT_SYMBOL_GPL(spu_free);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500410
Arnd Bergmann67207b92005-11-15 15:53:48 -0500411static int spu_handle_mm_fault(struct spu *spu)
412{
Arnd Bergmann67207b92005-11-15 15:53:48 -0500413 struct mm_struct *mm = spu->mm;
414 struct vm_area_struct *vma;
415 u64 ea, dsisr, is_write;
416 int ret;
417
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500418 ea = spu->dar;
419 dsisr = spu->dsisr;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500420#if 0
421 if (!IS_VALID_EA(ea)) {
422 return -EFAULT;
423 }
424#endif /* XXX */
425 if (mm == NULL) {
426 return -EFAULT;
427 }
428 if (mm->pgd == NULL) {
429 return -EFAULT;
430 }
431
432 down_read(&mm->mmap_sem);
433 vma = find_vma(mm, ea);
434 if (!vma)
435 goto bad_area;
436 if (vma->vm_start <= ea)
437 goto good_area;
438 if (!(vma->vm_flags & VM_GROWSDOWN))
439 goto bad_area;
440#if 0
441 if (expand_stack(vma, ea))
442 goto bad_area;
443#endif /* XXX */
444good_area:
445 is_write = dsisr & MFC_DSISR_ACCESS_PUT;
446 if (is_write) {
447 if (!(vma->vm_flags & VM_WRITE))
448 goto bad_area;
449 } else {
450 if (dsisr & MFC_DSISR_ACCESS_DENIED)
451 goto bad_area;
452 if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
453 goto bad_area;
454 }
455 ret = 0;
456 switch (handle_mm_fault(mm, vma, ea, is_write)) {
457 case VM_FAULT_MINOR:
458 current->min_flt++;
459 break;
460 case VM_FAULT_MAJOR:
461 current->maj_flt++;
462 break;
463 case VM_FAULT_SIGBUS:
464 ret = -EFAULT;
465 goto bad_area;
466 case VM_FAULT_OOM:
467 ret = -ENOMEM;
468 goto bad_area;
469 default:
470 BUG();
471 }
472 up_read(&mm->mmap_sem);
473 return ret;
474
475bad_area:
476 up_read(&mm->mmap_sem);
477 return -EFAULT;
478}
479
Arnd Bergmann51104592005-12-05 22:52:25 -0500480int spu_irq_class_1_bottom(struct spu *spu)
Arnd Bergmann67207b92005-11-15 15:53:48 -0500481{
Arnd Bergmann67207b92005-11-15 15:53:48 -0500482 u64 ea, dsisr, access, error = 0UL;
483 int ret = 0;
484
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500485 ea = spu->dar;
486 dsisr = spu->dsisr;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500487 if (dsisr & MFC_DSISR_PTE_NOT_FOUND) {
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500488 access = (_PAGE_PRESENT | _PAGE_USER);
489 access |= (dsisr & MFC_DSISR_ACCESS_PUT) ? _PAGE_RW : 0UL;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500490 if (hash_page(ea, access, 0x300) != 0)
491 error |= CLASS1_ENABLE_STORAGE_FAULT_INTR;
492 }
493 if ((error & CLASS1_ENABLE_STORAGE_FAULT_INTR) ||
494 (dsisr & MFC_DSISR_ACCESS_DENIED)) {
495 if ((ret = spu_handle_mm_fault(spu)) != 0)
496 error |= CLASS1_ENABLE_STORAGE_FAULT_INTR;
497 else
498 error &= ~CLASS1_ENABLE_STORAGE_FAULT_INTR;
499 }
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500500 spu->dar = 0UL;
501 spu->dsisr = 0UL;
502 if (!error) {
Arnd Bergmann67207b92005-11-15 15:53:48 -0500503 spu_restart_dma(spu);
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500504 } else {
505 __spu_trap_invalid_dma(spu);
506 }
Arnd Bergmann67207b92005-11-15 15:53:48 -0500507 return ret;
508}
509
Arnd Bergmann2fb9d202006-01-05 14:05:29 +0000510void spu_irq_setaffinity(struct spu *spu, int cpu)
511{
512 u64 target = iic_get_target_id(cpu);
513 u64 route = target << 48 | target << 32 | target << 16;
514 spu_int_route_set(spu, route);
515}
516EXPORT_SYMBOL_GPL(spu_irq_setaffinity);
517
Arnd Bergmann67207b92005-11-15 15:53:48 -0500518static void __iomem * __init map_spe_prop(struct device_node *n,
519 const char *name)
520{
521 struct address_prop {
522 unsigned long address;
523 unsigned int len;
524 } __attribute__((packed)) *prop;
525
526 void *p;
527 int proplen;
528
529 p = get_property(n, name, &proplen);
530 if (proplen != sizeof (struct address_prop))
531 return NULL;
532
533 prop = p;
534
535 return ioremap(prop->address, prop->len);
536}
537
538static void spu_unmap(struct spu *spu)
539{
540 iounmap(spu->priv2);
541 iounmap(spu->priv1);
542 iounmap(spu->problem);
543 iounmap((u8 __iomem *)spu->local_store);
544}
545
546static int __init spu_map_device(struct spu *spu, struct device_node *spe)
547{
548 char *prop;
549 int ret;
550
551 ret = -ENODEV;
552 prop = get_property(spe, "isrc", NULL);
553 if (!prop)
554 goto out;
555 spu->isrc = *(unsigned int *)prop;
556
557 spu->name = get_property(spe, "name", NULL);
558 if (!spu->name)
559 goto out;
560
561 prop = get_property(spe, "local-store", NULL);
562 if (!prop)
563 goto out;
564 spu->local_store_phys = *(unsigned long *)prop;
565
566 /* we use local store as ram, not io memory */
567 spu->local_store = (void __force *)map_spe_prop(spe, "local-store");
568 if (!spu->local_store)
569 goto out;
570
571 spu->problem= map_spe_prop(spe, "problem");
572 if (!spu->problem)
573 goto out_unmap;
574
575 spu->priv1= map_spe_prop(spe, "priv1");
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100576 /* priv1 is not available on a hypervisor */
Arnd Bergmann67207b92005-11-15 15:53:48 -0500577
578 spu->priv2= map_spe_prop(spe, "priv2");
579 if (!spu->priv2)
580 goto out_unmap;
581 ret = 0;
582 goto out;
583
584out_unmap:
585 spu_unmap(spu);
586out:
587 return ret;
588}
589
590static int __init find_spu_node_id(struct device_node *spe)
591{
592 unsigned int *id;
593 struct device_node *cpu;
594
595 cpu = spe->parent->parent;
596 id = (unsigned int *)get_property(cpu, "node-id", NULL);
597
598 return id ? *id : 0;
599}
600
601static int __init create_spu(struct device_node *spe)
602{
603 struct spu *spu;
604 int ret;
605 static int number;
606
607 ret = -ENOMEM;
608 spu = kmalloc(sizeof (*spu), GFP_KERNEL);
609 if (!spu)
610 goto out;
611
612 ret = spu_map_device(spu, spe);
613 if (ret)
614 goto out_free;
615
616 spu->node = find_spu_node_id(spe);
617 spu->stop_code = 0;
618 spu->slb_replace = 0;
619 spu->mm = NULL;
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500620 spu->ctx = NULL;
621 spu->rq = NULL;
622 spu->pid = 0;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500623 spu->class_0_pending = 0;
Mark Nutter5473af02005-11-15 15:53:49 -0500624 spu->flags = 0UL;
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500625 spu->dar = 0UL;
626 spu->dsisr = 0UL;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500627 spin_lock_init(&spu->register_lock);
628
Arnd Bergmannf0831ac2006-01-04 20:31:30 +0100629 spu_mfc_sdr_set(spu, mfspr(SPRN_SDR1));
630 spu_mfc_sr1_set(spu, 0x33);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500631
Arnd Bergmann8b3d6662005-11-15 15:53:52 -0500632 spu->ibox_callback = NULL;
633 spu->wbox_callback = NULL;
Arnd Bergmann51104592005-12-05 22:52:25 -0500634 spu->stop_callback = NULL;
Arnd Bergmann67207b92005-11-15 15:53:48 -0500635
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800636 mutex_lock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500637 spu->number = number++;
638 ret = spu_request_irqs(spu);
639 if (ret)
640 goto out_unmap;
641
642 list_add(&spu->list, &spu_list);
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800643 mutex_unlock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500644
645 pr_debug(KERN_DEBUG "Using SPE %s %02x %p %p %p %p %d\n",
646 spu->name, spu->isrc, spu->local_store,
647 spu->problem, spu->priv1, spu->priv2, spu->number);
648 goto out;
649
650out_unmap:
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800651 mutex_unlock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500652 spu_unmap(spu);
653out_free:
654 kfree(spu);
655out:
656 return ret;
657}
658
659static void destroy_spu(struct spu *spu)
660{
661 list_del_init(&spu->list);
662
663 spu_free_irqs(spu);
664 spu_unmap(spu);
665 kfree(spu);
666}
667
668static void cleanup_spu_base(void)
669{
670 struct spu *spu, *tmp;
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800671 mutex_lock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500672 list_for_each_entry_safe(spu, tmp, &spu_list, list)
673 destroy_spu(spu);
Ingo Molnar14cc3e22006-03-26 01:37:14 -0800674 mutex_unlock(&spu_mutex);
Arnd Bergmann67207b92005-11-15 15:53:48 -0500675}
676module_exit(cleanup_spu_base);
677
678static int __init init_spu_base(void)
679{
680 struct device_node *node;
681 int ret;
682
683 ret = -ENODEV;
684 for (node = of_find_node_by_type(NULL, "spe");
685 node; node = of_find_node_by_type(node, "spe")) {
686 ret = create_spu(node);
687 if (ret) {
688 printk(KERN_WARNING "%s: Error initializing %s\n",
689 __FUNCTION__, node->name);
690 cleanup_spu_base();
691 break;
692 }
693 }
694 /* in some old firmware versions, the spe is called 'spc', so we
695 look for that as well */
696 for (node = of_find_node_by_type(NULL, "spc");
697 node; node = of_find_node_by_type(node, "spc")) {
698 ret = create_spu(node);
699 if (ret) {
700 printk(KERN_WARNING "%s: Error initializing %s\n",
701 __FUNCTION__, node->name);
702 cleanup_spu_base();
703 break;
704 }
705 }
706 return ret;
707}
708module_init(init_spu_base);
709
710MODULE_LICENSE("GPL");
711MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");