Commit | Line | Data |
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67207b96 AB |
1 | /* |
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 | ||
3b3d22cb | 23 | #undef DEBUG |
67207b96 AB |
24 | |
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> | |
14cc3e2b | 35 | #include <linux/mutex.h> |
67207b96 | 36 | #include <asm/spu.h> |
540270d8 | 37 | #include <asm/spu_priv1.h> |
67207b96 AB |
38 | #include <asm/mmu_context.h> |
39 | ||
40 | #include "interrupt.h" | |
41 | ||
540270d8 GL |
42 | const struct spu_priv1_ops *spu_priv1_ops; |
43 | ||
44 | EXPORT_SYMBOL_GPL(spu_priv1_ops); | |
45 | ||
67207b96 AB |
46 | static int __spu_trap_invalid_dma(struct spu *spu) |
47 | { | |
48 | pr_debug("%s\n", __FUNCTION__); | |
49 | force_sig(SIGBUS, /* info, */ current); | |
50 | return 0; | |
51 | } | |
52 | ||
53 | static int __spu_trap_dma_align(struct spu *spu) | |
54 | { | |
55 | pr_debug("%s\n", __FUNCTION__); | |
56 | force_sig(SIGBUS, /* info, */ current); | |
57 | return 0; | |
58 | } | |
59 | ||
60 | static int __spu_trap_error(struct spu *spu) | |
61 | { | |
62 | pr_debug("%s\n", __FUNCTION__); | |
63 | force_sig(SIGILL, /* info, */ current); | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static void spu_restart_dma(struct spu *spu) | |
68 | { | |
69 | struct spu_priv2 __iomem *priv2 = spu->priv2; | |
5473af04 | 70 | |
8837d921 | 71 | if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags)) |
5473af04 | 72 | out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); |
67207b96 AB |
73 | } |
74 | ||
75 | static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) | |
76 | { | |
8b3d6663 AB |
77 | struct spu_priv2 __iomem *priv2 = spu->priv2; |
78 | struct mm_struct *mm = spu->mm; | |
724bd80e | 79 | u64 esid, vsid, llp; |
67207b96 AB |
80 | |
81 | pr_debug("%s\n", __FUNCTION__); | |
82 | ||
8837d921 | 83 | if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) { |
8b3d6663 AB |
84 | /* SLBs are pre-loaded for context switch, so |
85 | * we should never get here! | |
86 | */ | |
5473af04 MN |
87 | printk("%s: invalid access during switch!\n", __func__); |
88 | return 1; | |
89 | } | |
8b3d6663 AB |
90 | if (!mm || (REGION_ID(ea) != USER_REGION_ID)) { |
91 | /* Future: support kernel segments so that drivers | |
92 | * can use SPUs. | |
93 | */ | |
67207b96 AB |
94 | pr_debug("invalid region access at %016lx\n", ea); |
95 | return 1; | |
96 | } | |
97 | ||
8b3d6663 | 98 | esid = (ea & ESID_MASK) | SLB_ESID_V; |
724bd80e | 99 | #ifdef CONFIG_HUGETLB_PAGE |
8b3d6663 | 100 | if (in_hugepage_area(mm->context, ea)) |
724bd80e | 101 | llp = mmu_psize_defs[mmu_huge_psize].sllp; |
102 | else | |
103 | #endif | |
104 | llp = mmu_psize_defs[mmu_virtual_psize].sllp; | |
105 | vsid = (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT) | | |
106 | SLB_VSID_USER | llp; | |
67207b96 | 107 | |
8b3d6663 AB |
108 | out_be64(&priv2->slb_index_W, spu->slb_replace); |
109 | out_be64(&priv2->slb_vsid_RW, vsid); | |
110 | out_be64(&priv2->slb_esid_RW, esid); | |
111 | ||
112 | spu->slb_replace++; | |
67207b96 AB |
113 | if (spu->slb_replace >= 8) |
114 | spu->slb_replace = 0; | |
115 | ||
67207b96 AB |
116 | spu_restart_dma(spu); |
117 | ||
67207b96 AB |
118 | return 0; |
119 | } | |
120 | ||
5473af04 | 121 | extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX |
8b3d6663 | 122 | static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr) |
67207b96 | 123 | { |
a33a7d73 | 124 | pr_debug("%s, %lx, %lx\n", __FUNCTION__, dsisr, ea); |
67207b96 | 125 | |
5473af04 MN |
126 | /* Handle kernel space hash faults immediately. |
127 | User hash faults need to be deferred to process context. */ | |
128 | if ((dsisr & MFC_DSISR_PTE_NOT_FOUND) | |
129 | && REGION_ID(ea) != USER_REGION_ID | |
130 | && hash_page(ea, _PAGE_PRESENT, 0x300) == 0) { | |
131 | spu_restart_dma(spu); | |
132 | return 0; | |
133 | } | |
134 | ||
8837d921 | 135 | if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) { |
5473af04 MN |
136 | printk("%s: invalid access during switch!\n", __func__); |
137 | return 1; | |
138 | } | |
67207b96 | 139 | |
8b3d6663 AB |
140 | spu->dar = ea; |
141 | spu->dsisr = dsisr; | |
142 | mb(); | |
ba723fe2 | 143 | spu->stop_callback(spu); |
67207b96 AB |
144 | return 0; |
145 | } | |
146 | ||
147 | static irqreturn_t | |
148 | spu_irq_class_0(int irq, void *data, struct pt_regs *regs) | |
149 | { | |
150 | struct spu *spu; | |
151 | ||
152 | spu = data; | |
153 | spu->class_0_pending = 1; | |
ba723fe2 | 154 | spu->stop_callback(spu); |
67207b96 AB |
155 | |
156 | return IRQ_HANDLED; | |
157 | } | |
158 | ||
5110459f | 159 | int |
67207b96 AB |
160 | spu_irq_class_0_bottom(struct spu *spu) |
161 | { | |
3a843d7c | 162 | unsigned long stat, mask; |
67207b96 AB |
163 | |
164 | spu->class_0_pending = 0; | |
165 | ||
f0831acc AB |
166 | mask = spu_int_mask_get(spu, 0); |
167 | stat = spu_int_stat_get(spu, 0); | |
67207b96 | 168 | |
3a843d7c AB |
169 | stat &= mask; |
170 | ||
2cd90bc8 | 171 | if (stat & 1) /* invalid DMA alignment */ |
67207b96 AB |
172 | __spu_trap_dma_align(spu); |
173 | ||
2cd90bc8 AB |
174 | if (stat & 2) /* invalid MFC DMA */ |
175 | __spu_trap_invalid_dma(spu); | |
176 | ||
67207b96 AB |
177 | if (stat & 4) /* error on SPU */ |
178 | __spu_trap_error(spu); | |
179 | ||
f0831acc | 180 | spu_int_stat_clear(spu, 0, stat); |
5110459f AB |
181 | |
182 | return (stat & 0x7) ? -EIO : 0; | |
67207b96 | 183 | } |
5110459f | 184 | EXPORT_SYMBOL_GPL(spu_irq_class_0_bottom); |
67207b96 AB |
185 | |
186 | static irqreturn_t | |
187 | spu_irq_class_1(int irq, void *data, struct pt_regs *regs) | |
188 | { | |
189 | struct spu *spu; | |
8b3d6663 | 190 | unsigned long stat, mask, dar, dsisr; |
67207b96 AB |
191 | |
192 | spu = data; | |
8b3d6663 AB |
193 | |
194 | /* atomically read & clear class1 status. */ | |
195 | spin_lock(&spu->register_lock); | |
f0831acc AB |
196 | mask = spu_int_mask_get(spu, 1); |
197 | stat = spu_int_stat_get(spu, 1) & mask; | |
198 | dar = spu_mfc_dar_get(spu); | |
199 | dsisr = spu_mfc_dsisr_get(spu); | |
38307341 | 200 | if (stat & 2) /* mapping fault */ |
f0831acc AB |
201 | spu_mfc_dsisr_set(spu, 0ul); |
202 | spu_int_stat_clear(spu, 1, stat); | |
8b3d6663 | 203 | spin_unlock(&spu->register_lock); |
a33a7d73 AB |
204 | pr_debug("%s: %lx %lx %lx %lx\n", __FUNCTION__, mask, stat, |
205 | dar, dsisr); | |
67207b96 AB |
206 | |
207 | if (stat & 1) /* segment fault */ | |
208 | __spu_trap_data_seg(spu, dar); | |
209 | ||
210 | if (stat & 2) { /* mapping fault */ | |
8b3d6663 | 211 | __spu_trap_data_map(spu, dar, dsisr); |
67207b96 AB |
212 | } |
213 | ||
214 | if (stat & 4) /* ls compare & suspend on get */ | |
215 | ; | |
216 | ||
217 | if (stat & 8) /* ls compare & suspend on put */ | |
218 | ; | |
219 | ||
67207b96 AB |
220 | return stat ? IRQ_HANDLED : IRQ_NONE; |
221 | } | |
5110459f | 222 | EXPORT_SYMBOL_GPL(spu_irq_class_1_bottom); |
67207b96 AB |
223 | |
224 | static irqreturn_t | |
225 | spu_irq_class_2(int irq, void *data, struct pt_regs *regs) | |
226 | { | |
227 | struct spu *spu; | |
228 | unsigned long stat; | |
3a843d7c | 229 | unsigned long mask; |
67207b96 AB |
230 | |
231 | spu = data; | |
ba723fe2 | 232 | spin_lock(&spu->register_lock); |
f0831acc AB |
233 | stat = spu_int_stat_get(spu, 2); |
234 | mask = spu_int_mask_get(spu, 2); | |
ba723fe2 MN |
235 | /* ignore interrupts we're not waiting for */ |
236 | stat &= mask; | |
237 | /* | |
238 | * mailbox interrupts (0x1 and 0x10) are level triggered. | |
239 | * mask them now before acknowledging. | |
240 | */ | |
241 | if (stat & 0x11) | |
242 | spu_int_mask_and(spu, 2, ~(stat & 0x11)); | |
243 | /* acknowledge all interrupts before the callbacks */ | |
244 | spu_int_stat_clear(spu, 2, stat); | |
245 | spin_unlock(&spu->register_lock); | |
67207b96 | 246 | |
3a843d7c | 247 | pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask); |
67207b96 | 248 | |
67207b96 | 249 | if (stat & 1) /* PPC core mailbox */ |
ba723fe2 | 250 | spu->ibox_callback(spu); |
67207b96 AB |
251 | |
252 | if (stat & 2) /* SPU stop-and-signal */ | |
ba723fe2 | 253 | spu->stop_callback(spu); |
67207b96 AB |
254 | |
255 | if (stat & 4) /* SPU halted */ | |
ba723fe2 | 256 | spu->stop_callback(spu); |
67207b96 AB |
257 | |
258 | if (stat & 8) /* DMA tag group complete */ | |
ba723fe2 | 259 | spu->mfc_callback(spu); |
67207b96 AB |
260 | |
261 | if (stat & 0x10) /* SPU mailbox threshold */ | |
ba723fe2 | 262 | spu->wbox_callback(spu); |
67207b96 | 263 | |
67207b96 AB |
264 | return stat ? IRQ_HANDLED : IRQ_NONE; |
265 | } | |
266 | ||
0ebfff14 | 267 | static int spu_request_irqs(struct spu *spu) |
67207b96 | 268 | { |
0ebfff14 | 269 | int ret = 0; |
67207b96 | 270 | |
0ebfff14 BH |
271 | if (spu->irqs[0] != NO_IRQ) { |
272 | snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0", | |
273 | spu->number); | |
274 | ret = request_irq(spu->irqs[0], spu_irq_class_0, | |
275 | IRQF_DISABLED, | |
276 | spu->irq_c0, spu); | |
277 | if (ret) | |
278 | goto bail0; | |
279 | } | |
280 | if (spu->irqs[1] != NO_IRQ) { | |
281 | snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1", | |
282 | spu->number); | |
283 | ret = request_irq(spu->irqs[1], spu_irq_class_1, | |
284 | IRQF_DISABLED, | |
285 | spu->irq_c1, spu); | |
286 | if (ret) | |
287 | goto bail1; | |
288 | } | |
289 | if (spu->irqs[2] != NO_IRQ) { | |
290 | snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2", | |
291 | spu->number); | |
292 | ret = request_irq(spu->irqs[2], spu_irq_class_2, | |
293 | IRQF_DISABLED, | |
294 | spu->irq_c2, spu); | |
295 | if (ret) | |
296 | goto bail2; | |
297 | } | |
298 | return 0; | |
67207b96 | 299 | |
0ebfff14 BH |
300 | bail2: |
301 | if (spu->irqs[1] != NO_IRQ) | |
302 | free_irq(spu->irqs[1], spu); | |
303 | bail1: | |
304 | if (spu->irqs[0] != NO_IRQ) | |
305 | free_irq(spu->irqs[0], spu); | |
306 | bail0: | |
67207b96 AB |
307 | return ret; |
308 | } | |
309 | ||
0ebfff14 | 310 | static void spu_free_irqs(struct spu *spu) |
67207b96 | 311 | { |
0ebfff14 BH |
312 | if (spu->irqs[0] != NO_IRQ) |
313 | free_irq(spu->irqs[0], spu); | |
314 | if (spu->irqs[1] != NO_IRQ) | |
315 | free_irq(spu->irqs[1], spu); | |
316 | if (spu->irqs[2] != NO_IRQ) | |
317 | free_irq(spu->irqs[2], spu); | |
67207b96 AB |
318 | } |
319 | ||
320 | static LIST_HEAD(spu_list); | |
14cc3e2b | 321 | static DEFINE_MUTEX(spu_mutex); |
67207b96 AB |
322 | |
323 | static void spu_init_channels(struct spu *spu) | |
324 | { | |
325 | static const struct { | |
326 | unsigned channel; | |
327 | unsigned count; | |
328 | } zero_list[] = { | |
329 | { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, }, | |
330 | { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, }, | |
331 | }, count_list[] = { | |
332 | { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, }, | |
333 | { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, }, | |
334 | { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, }, | |
335 | }; | |
6ff730c3 | 336 | struct spu_priv2 __iomem *priv2; |
67207b96 AB |
337 | int i; |
338 | ||
339 | priv2 = spu->priv2; | |
340 | ||
341 | /* initialize all channel data to zero */ | |
342 | for (i = 0; i < ARRAY_SIZE(zero_list); i++) { | |
343 | int count; | |
344 | ||
345 | out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel); | |
346 | for (count = 0; count < zero_list[i].count; count++) | |
347 | out_be64(&priv2->spu_chnldata_RW, 0); | |
348 | } | |
349 | ||
350 | /* initialize channel counts to meaningful values */ | |
351 | for (i = 0; i < ARRAY_SIZE(count_list); i++) { | |
352 | out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel); | |
353 | out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count); | |
354 | } | |
355 | } | |
356 | ||
67207b96 AB |
357 | struct spu *spu_alloc(void) |
358 | { | |
359 | struct spu *spu; | |
360 | ||
14cc3e2b | 361 | mutex_lock(&spu_mutex); |
67207b96 AB |
362 | if (!list_empty(&spu_list)) { |
363 | spu = list_entry(spu_list.next, struct spu, list); | |
364 | list_del_init(&spu->list); | |
365 | pr_debug("Got SPU %x %d\n", spu->isrc, spu->number); | |
366 | } else { | |
367 | pr_debug("No SPU left\n"); | |
368 | spu = NULL; | |
369 | } | |
14cc3e2b | 370 | mutex_unlock(&spu_mutex); |
67207b96 | 371 | |
f0831acc | 372 | if (spu) |
67207b96 | 373 | spu_init_channels(spu); |
67207b96 AB |
374 | |
375 | return spu; | |
376 | } | |
39c73c33 | 377 | EXPORT_SYMBOL_GPL(spu_alloc); |
67207b96 AB |
378 | |
379 | void spu_free(struct spu *spu) | |
380 | { | |
14cc3e2b | 381 | mutex_lock(&spu_mutex); |
67207b96 | 382 | list_add_tail(&spu->list, &spu_list); |
14cc3e2b | 383 | mutex_unlock(&spu_mutex); |
67207b96 | 384 | } |
39c73c33 | 385 | EXPORT_SYMBOL_GPL(spu_free); |
67207b96 | 386 | |
67207b96 AB |
387 | static int spu_handle_mm_fault(struct spu *spu) |
388 | { | |
67207b96 AB |
389 | struct mm_struct *mm = spu->mm; |
390 | struct vm_area_struct *vma; | |
391 | u64 ea, dsisr, is_write; | |
392 | int ret; | |
393 | ||
8b3d6663 AB |
394 | ea = spu->dar; |
395 | dsisr = spu->dsisr; | |
67207b96 AB |
396 | #if 0 |
397 | if (!IS_VALID_EA(ea)) { | |
398 | return -EFAULT; | |
399 | } | |
400 | #endif /* XXX */ | |
401 | if (mm == NULL) { | |
402 | return -EFAULT; | |
403 | } | |
404 | if (mm->pgd == NULL) { | |
405 | return -EFAULT; | |
406 | } | |
407 | ||
408 | down_read(&mm->mmap_sem); | |
409 | vma = find_vma(mm, ea); | |
410 | if (!vma) | |
411 | goto bad_area; | |
412 | if (vma->vm_start <= ea) | |
413 | goto good_area; | |
414 | if (!(vma->vm_flags & VM_GROWSDOWN)) | |
415 | goto bad_area; | |
416 | #if 0 | |
417 | if (expand_stack(vma, ea)) | |
418 | goto bad_area; | |
419 | #endif /* XXX */ | |
420 | good_area: | |
421 | is_write = dsisr & MFC_DSISR_ACCESS_PUT; | |
422 | if (is_write) { | |
423 | if (!(vma->vm_flags & VM_WRITE)) | |
424 | goto bad_area; | |
425 | } else { | |
426 | if (dsisr & MFC_DSISR_ACCESS_DENIED) | |
427 | goto bad_area; | |
428 | if (!(vma->vm_flags & (VM_READ | VM_EXEC))) | |
429 | goto bad_area; | |
430 | } | |
431 | ret = 0; | |
432 | switch (handle_mm_fault(mm, vma, ea, is_write)) { | |
433 | case VM_FAULT_MINOR: | |
434 | current->min_flt++; | |
435 | break; | |
436 | case VM_FAULT_MAJOR: | |
437 | current->maj_flt++; | |
438 | break; | |
439 | case VM_FAULT_SIGBUS: | |
440 | ret = -EFAULT; | |
441 | goto bad_area; | |
442 | case VM_FAULT_OOM: | |
443 | ret = -ENOMEM; | |
444 | goto bad_area; | |
445 | default: | |
446 | BUG(); | |
447 | } | |
448 | up_read(&mm->mmap_sem); | |
449 | return ret; | |
450 | ||
451 | bad_area: | |
452 | up_read(&mm->mmap_sem); | |
453 | return -EFAULT; | |
454 | } | |
455 | ||
5110459f | 456 | int spu_irq_class_1_bottom(struct spu *spu) |
67207b96 | 457 | { |
67207b96 AB |
458 | u64 ea, dsisr, access, error = 0UL; |
459 | int ret = 0; | |
460 | ||
8b3d6663 AB |
461 | ea = spu->dar; |
462 | dsisr = spu->dsisr; | |
79c227a9 | 463 | if (dsisr & (MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED)) { |
f807221d AB |
464 | u64 flags; |
465 | ||
8b3d6663 AB |
466 | access = (_PAGE_PRESENT | _PAGE_USER); |
467 | access |= (dsisr & MFC_DSISR_ACCESS_PUT) ? _PAGE_RW : 0UL; | |
f807221d | 468 | local_irq_save(flags); |
67207b96 AB |
469 | if (hash_page(ea, access, 0x300) != 0) |
470 | error |= CLASS1_ENABLE_STORAGE_FAULT_INTR; | |
f807221d | 471 | local_irq_restore(flags); |
67207b96 | 472 | } |
79c227a9 | 473 | if (error & CLASS1_ENABLE_STORAGE_FAULT_INTR) { |
67207b96 AB |
474 | if ((ret = spu_handle_mm_fault(spu)) != 0) |
475 | error |= CLASS1_ENABLE_STORAGE_FAULT_INTR; | |
476 | else | |
477 | error &= ~CLASS1_ENABLE_STORAGE_FAULT_INTR; | |
478 | } | |
8b3d6663 AB |
479 | spu->dar = 0UL; |
480 | spu->dsisr = 0UL; | |
481 | if (!error) { | |
67207b96 | 482 | spu_restart_dma(spu); |
8b3d6663 AB |
483 | } else { |
484 | __spu_trap_invalid_dma(spu); | |
485 | } | |
67207b96 AB |
486 | return ret; |
487 | } | |
488 | ||
bed120c6 JS |
489 | static int __init find_spu_node_id(struct device_node *spe) |
490 | { | |
491 | unsigned int *id; | |
492 | struct device_node *cpu; | |
493 | cpu = spe->parent->parent; | |
494 | id = (unsigned int *)get_property(cpu, "node-id", NULL); | |
495 | return id ? *id : 0; | |
496 | } | |
497 | ||
8261aa60 JK |
498 | static int __init cell_spuprop_present(struct spu *spu, struct device_node *spe, |
499 | const char *prop) | |
bed120c6 JS |
500 | { |
501 | static DEFINE_MUTEX(add_spumem_mutex); | |
502 | ||
503 | struct address_prop { | |
504 | unsigned long address; | |
505 | unsigned int len; | |
506 | } __attribute__((packed)) *p; | |
507 | int proplen; | |
508 | ||
509 | unsigned long start_pfn, nr_pages; | |
bed120c6 JS |
510 | struct pglist_data *pgdata; |
511 | struct zone *zone; | |
512 | int ret; | |
513 | ||
514 | p = (void*)get_property(spe, prop, &proplen); | |
515 | WARN_ON(proplen != sizeof (*p)); | |
516 | ||
517 | start_pfn = p->address >> PAGE_SHIFT; | |
518 | nr_pages = ((unsigned long)p->len + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
519 | ||
8261aa60 | 520 | pgdata = NODE_DATA(spu->nid); |
bed120c6 JS |
521 | zone = pgdata->node_zones; |
522 | ||
523 | /* XXX rethink locking here */ | |
524 | mutex_lock(&add_spumem_mutex); | |
525 | ret = __add_pages(zone, start_pfn, nr_pages); | |
526 | mutex_unlock(&add_spumem_mutex); | |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
8261aa60 JK |
531 | static void __iomem * __init map_spe_prop(struct spu *spu, |
532 | struct device_node *n, const char *name) | |
67207b96 AB |
533 | { |
534 | struct address_prop { | |
535 | unsigned long address; | |
536 | unsigned int len; | |
537 | } __attribute__((packed)) *prop; | |
538 | ||
539 | void *p; | |
540 | int proplen; | |
bed120c6 JS |
541 | void* ret = NULL; |
542 | int err = 0; | |
67207b96 AB |
543 | |
544 | p = get_property(n, name, &proplen); | |
545 | if (proplen != sizeof (struct address_prop)) | |
546 | return NULL; | |
547 | ||
548 | prop = p; | |
549 | ||
8261aa60 | 550 | err = cell_spuprop_present(spu, n, name); |
bed120c6 JS |
551 | if (err && (err != -EEXIST)) |
552 | goto out; | |
553 | ||
554 | ret = ioremap(prop->address, prop->len); | |
555 | ||
556 | out: | |
557 | return ret; | |
67207b96 AB |
558 | } |
559 | ||
560 | static void spu_unmap(struct spu *spu) | |
561 | { | |
562 | iounmap(spu->priv2); | |
563 | iounmap(spu->priv1); | |
564 | iounmap(spu->problem); | |
565 | iounmap((u8 __iomem *)spu->local_store); | |
566 | } | |
567 | ||
0ebfff14 BH |
568 | /* This function shall be abstracted for HV platforms */ |
569 | static int __init spu_map_interrupts(struct spu *spu, struct device_node *np) | |
570 | { | |
571 | struct irq_host *host; | |
572 | unsigned int isrc; | |
573 | u32 *tmp; | |
574 | ||
575 | host = iic_get_irq_host(spu->node); | |
576 | if (host == NULL) | |
577 | return -ENODEV; | |
578 | ||
579 | /* Get the interrupt source from the device-tree */ | |
580 | tmp = (u32 *)get_property(np, "isrc", NULL); | |
581 | if (!tmp) | |
582 | return -ENODEV; | |
583 | spu->isrc = isrc = tmp[0]; | |
584 | ||
585 | /* Now map interrupts of all 3 classes */ | |
586 | spu->irqs[0] = irq_create_mapping(host, 0x00 | isrc, 0); | |
587 | spu->irqs[1] = irq_create_mapping(host, 0x10 | isrc, 0); | |
588 | spu->irqs[2] = irq_create_mapping(host, 0x20 | isrc, 0); | |
589 | ||
590 | /* Right now, we only fail if class 2 failed */ | |
591 | return spu->irqs[2] == NO_IRQ ? -EINVAL : 0; | |
592 | } | |
593 | ||
8261aa60 | 594 | static int __init spu_map_device(struct spu *spu, struct device_node *node) |
67207b96 AB |
595 | { |
596 | char *prop; | |
597 | int ret; | |
598 | ||
599 | ret = -ENODEV; | |
8261aa60 | 600 | spu->name = get_property(node, "name", NULL); |
67207b96 AB |
601 | if (!spu->name) |
602 | goto out; | |
603 | ||
8261aa60 | 604 | prop = get_property(node, "local-store", NULL); |
67207b96 AB |
605 | if (!prop) |
606 | goto out; | |
607 | spu->local_store_phys = *(unsigned long *)prop; | |
608 | ||
609 | /* we use local store as ram, not io memory */ | |
8261aa60 JK |
610 | spu->local_store = (void __force *) |
611 | map_spe_prop(spu, node, "local-store"); | |
67207b96 AB |
612 | if (!spu->local_store) |
613 | goto out; | |
614 | ||
8261aa60 | 615 | prop = get_property(node, "problem", NULL); |
6df10a82 MN |
616 | if (!prop) |
617 | goto out_unmap; | |
618 | spu->problem_phys = *(unsigned long *)prop; | |
619 | ||
8261aa60 | 620 | spu->problem= map_spe_prop(spu, node, "problem"); |
67207b96 AB |
621 | if (!spu->problem) |
622 | goto out_unmap; | |
623 | ||
8261aa60 | 624 | spu->priv1= map_spe_prop(spu, node, "priv1"); |
f0831acc | 625 | /* priv1 is not available on a hypervisor */ |
67207b96 | 626 | |
8261aa60 | 627 | spu->priv2= map_spe_prop(spu, node, "priv2"); |
67207b96 AB |
628 | if (!spu->priv2) |
629 | goto out_unmap; | |
630 | ret = 0; | |
631 | goto out; | |
632 | ||
633 | out_unmap: | |
634 | spu_unmap(spu); | |
635 | out: | |
636 | return ret; | |
637 | } | |
638 | ||
1d64093f JK |
639 | struct sysdev_class spu_sysdev_class = { |
640 | set_kset_name("spu") | |
641 | }; | |
642 | ||
643 | static ssize_t spu_show_isrc(struct sys_device *sysdev, char *buf) | |
644 | { | |
645 | struct spu *spu = container_of(sysdev, struct spu, sysdev); | |
646 | return sprintf(buf, "%d\n", spu->isrc); | |
647 | ||
648 | } | |
649 | static SYSDEV_ATTR(isrc, 0400, spu_show_isrc, NULL); | |
650 | ||
651 | extern int attach_sysdev_to_node(struct sys_device *dev, int nid); | |
652 | ||
653 | static int spu_create_sysdev(struct spu *spu) | |
654 | { | |
655 | int ret; | |
656 | ||
657 | spu->sysdev.id = spu->number; | |
658 | spu->sysdev.cls = &spu_sysdev_class; | |
659 | ret = sysdev_register(&spu->sysdev); | |
660 | if (ret) { | |
661 | printk(KERN_ERR "Can't register SPU %d with sysfs\n", | |
662 | spu->number); | |
663 | return ret; | |
664 | } | |
665 | ||
0ebfff14 BH |
666 | if (spu->isrc != 0) |
667 | sysdev_create_file(&spu->sysdev, &attr_isrc); | |
1d64093f JK |
668 | sysfs_add_device_to_node(&spu->sysdev, spu->nid); |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | static void spu_destroy_sysdev(struct spu *spu) | |
674 | { | |
675 | sysdev_remove_file(&spu->sysdev, &attr_isrc); | |
676 | sysfs_remove_device_from_node(&spu->sysdev, spu->nid); | |
677 | sysdev_unregister(&spu->sysdev); | |
678 | } | |
679 | ||
67207b96 AB |
680 | static int __init create_spu(struct device_node *spe) |
681 | { | |
682 | struct spu *spu; | |
683 | int ret; | |
684 | static int number; | |
685 | ||
686 | ret = -ENOMEM; | |
ecec2177 | 687 | spu = kzalloc(sizeof (*spu), GFP_KERNEL); |
67207b96 AB |
688 | if (!spu) |
689 | goto out; | |
690 | ||
691 | ret = spu_map_device(spu, spe); | |
692 | if (ret) | |
693 | goto out_free; | |
694 | ||
695 | spu->node = find_spu_node_id(spe); | |
8261aa60 JK |
696 | spu->nid = of_node_to_nid(spe); |
697 | if (spu->nid == -1) | |
698 | spu->nid = 0; | |
0ebfff14 BH |
699 | ret = spu_map_interrupts(spu, spe); |
700 | if (ret) | |
701 | goto out_unmap; | |
67207b96 | 702 | spin_lock_init(&spu->register_lock); |
f0831acc AB |
703 | spu_mfc_sdr_set(spu, mfspr(SPRN_SDR1)); |
704 | spu_mfc_sr1_set(spu, 0x33); | |
14cc3e2b | 705 | mutex_lock(&spu_mutex); |
ecec2177 | 706 | |
67207b96 AB |
707 | spu->number = number++; |
708 | ret = spu_request_irqs(spu); | |
709 | if (ret) | |
710 | goto out_unmap; | |
711 | ||
1d64093f JK |
712 | ret = spu_create_sysdev(spu); |
713 | if (ret) | |
714 | goto out_free_irqs; | |
715 | ||
67207b96 | 716 | list_add(&spu->list, &spu_list); |
14cc3e2b | 717 | mutex_unlock(&spu_mutex); |
67207b96 AB |
718 | |
719 | pr_debug(KERN_DEBUG "Using SPE %s %02x %p %p %p %p %d\n", | |
720 | spu->name, spu->isrc, spu->local_store, | |
721 | spu->problem, spu->priv1, spu->priv2, spu->number); | |
722 | goto out; | |
723 | ||
1d64093f JK |
724 | out_free_irqs: |
725 | spu_free_irqs(spu); | |
726 | ||
67207b96 | 727 | out_unmap: |
14cc3e2b | 728 | mutex_unlock(&spu_mutex); |
67207b96 AB |
729 | spu_unmap(spu); |
730 | out_free: | |
731 | kfree(spu); | |
732 | out: | |
733 | return ret; | |
734 | } | |
735 | ||
736 | static void destroy_spu(struct spu *spu) | |
737 | { | |
738 | list_del_init(&spu->list); | |
739 | ||
1d64093f | 740 | spu_destroy_sysdev(spu); |
67207b96 AB |
741 | spu_free_irqs(spu); |
742 | spu_unmap(spu); | |
743 | kfree(spu); | |
744 | } | |
745 | ||
746 | static void cleanup_spu_base(void) | |
747 | { | |
748 | struct spu *spu, *tmp; | |
14cc3e2b | 749 | mutex_lock(&spu_mutex); |
67207b96 AB |
750 | list_for_each_entry_safe(spu, tmp, &spu_list, list) |
751 | destroy_spu(spu); | |
14cc3e2b | 752 | mutex_unlock(&spu_mutex); |
1d64093f | 753 | sysdev_class_unregister(&spu_sysdev_class); |
67207b96 AB |
754 | } |
755 | module_exit(cleanup_spu_base); | |
756 | ||
757 | static int __init init_spu_base(void) | |
758 | { | |
759 | struct device_node *node; | |
760 | int ret; | |
761 | ||
1d64093f JK |
762 | /* create sysdev class for spus */ |
763 | ret = sysdev_class_register(&spu_sysdev_class); | |
764 | if (ret) | |
765 | return ret; | |
766 | ||
67207b96 AB |
767 | ret = -ENODEV; |
768 | for (node = of_find_node_by_type(NULL, "spe"); | |
769 | node; node = of_find_node_by_type(node, "spe")) { | |
770 | ret = create_spu(node); | |
771 | if (ret) { | |
772 | printk(KERN_WARNING "%s: Error initializing %s\n", | |
773 | __FUNCTION__, node->name); | |
774 | cleanup_spu_base(); | |
775 | break; | |
776 | } | |
777 | } | |
778 | /* in some old firmware versions, the spe is called 'spc', so we | |
779 | look for that as well */ | |
780 | for (node = of_find_node_by_type(NULL, "spc"); | |
781 | node; node = of_find_node_by_type(node, "spc")) { | |
782 | ret = create_spu(node); | |
783 | if (ret) { | |
784 | printk(KERN_WARNING "%s: Error initializing %s\n", | |
785 | __FUNCTION__, node->name); | |
786 | cleanup_spu_base(); | |
787 | break; | |
788 | } | |
789 | } | |
790 | return ret; | |
791 | } | |
792 | module_init(init_spu_base); | |
793 | ||
794 | MODULE_LICENSE("GPL"); | |
795 | MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); |