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authorArnd Bergmann <arnd@arndb.de>2005-11-15 15:53:48 -0500
committerPaul Mackerras <paulus@samba.org>2006-01-08 22:49:12 -0500
commit67207b9664a8d603138ef1556141e6d0a102bea7 (patch)
treee98886778be65aeb6625a5f516873bbc5beeb978 /arch/powerpc
parentd7a301033f1990188f65abf4fe8e5b90ef0e3888 (diff)
[PATCH] spufs: The SPU file system, base
This is the current version of the spu file system, used for driving SPEs on the Cell Broadband Engine. This release is almost identical to the version for the 2.6.14 kernel posted earlier, which is available as part of the Cell BE Linux distribution from http://www.bsc.es/projects/deepcomputing/linuxoncell/. The first patch provides all the interfaces for running spu application, but does not have any support for debugging SPU tasks or for scheduling. Both these functionalities are added in the subsequent patches. See Documentation/filesystems/spufs.txt on how to use spufs. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/Kconfig1
-rw-r--r--arch/powerpc/kernel/systbl.S2
-rw-r--r--arch/powerpc/mm/hash_utils_64.c1
-rw-r--r--arch/powerpc/platforms/cell/Kconfig13
-rw-r--r--arch/powerpc/platforms/cell/Makefile3
-rw-r--r--arch/powerpc/platforms/cell/spu_base.c740
-rw-r--r--arch/powerpc/platforms/cell/spu_syscalls.c86
-rw-r--r--arch/powerpc/platforms/cell/spufs/Makefile3
-rw-r--r--arch/powerpc/platforms/cell/spufs/context.c67
-rw-r--r--arch/powerpc/platforms/cell/spufs/file.c596
-rw-r--r--arch/powerpc/platforms/cell/spufs/inode.c470
-rw-r--r--arch/powerpc/platforms/cell/spufs/spufs.h71
-rw-r--r--arch/powerpc/platforms/cell/spufs/syscalls.c106
13 files changed, 2159 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4d71aa3ecbb5..39ca7b9da369 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -482,6 +482,7 @@ source arch/powerpc/platforms/embedded6xx/Kconfig
482source arch/powerpc/platforms/4xx/Kconfig 482source arch/powerpc/platforms/4xx/Kconfig
483source arch/powerpc/platforms/85xx/Kconfig 483source arch/powerpc/platforms/85xx/Kconfig
484source arch/powerpc/platforms/8xx/Kconfig 484source arch/powerpc/platforms/8xx/Kconfig
485source arch/powerpc/platforms/cell/Kconfig
485 486
486menu "Kernel options" 487menu "Kernel options"
487 488
diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S
index 4bb3650420b4..989f6286991a 100644
--- a/arch/powerpc/kernel/systbl.S
+++ b/arch/powerpc/kernel/systbl.S
@@ -319,3 +319,5 @@ COMPAT_SYS(ioprio_get)
319SYSCALL(inotify_init) 319SYSCALL(inotify_init)
320SYSCALL(inotify_add_watch) 320SYSCALL(inotify_add_watch)
321SYSCALL(inotify_rm_watch) 321SYSCALL(inotify_rm_watch)
322SYSCALL(spu_run)
323SYSCALL(spu_create)
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index a606504678bd..846a1894cf95 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -644,6 +644,7 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap)
644 DBG_LOW(" -> rc=%d\n", rc); 644 DBG_LOW(" -> rc=%d\n", rc);
645 return rc; 645 return rc;
646} 646}
647EXPORT_SYMBOL_GPL(hash_page);
647 648
648void hash_preload(struct mm_struct *mm, unsigned long ea, 649void hash_preload(struct mm_struct *mm, unsigned long ea,
649 unsigned long access, unsigned long trap) 650 unsigned long access, unsigned long trap)
diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig
new file mode 100644
index 000000000000..3157071e241c
--- /dev/null
+++ b/arch/powerpc/platforms/cell/Kconfig
@@ -0,0 +1,13 @@
1menu "Cell Broadband Engine options"
2 depends on PPC_CELL
3
4config SPU_FS
5 tristate "SPU file system"
6 default m
7 depends on PPC_CELL
8 help
9 The SPU file system is used to access Synergistic Processing
10 Units on machines implementing the Broadband Processor
11 Architecture.
12
13endmenu
diff --git a/arch/powerpc/platforms/cell/Makefile b/arch/powerpc/platforms/cell/Makefile
index 55e094b96bc0..74616cf13af9 100644
--- a/arch/powerpc/platforms/cell/Makefile
+++ b/arch/powerpc/platforms/cell/Makefile
@@ -1,2 +1,5 @@
1obj-y += interrupt.o iommu.o setup.o spider-pic.o 1obj-y += interrupt.o iommu.o setup.o spider-pic.o
2obj-$(CONFIG_SMP) += smp.o 2obj-$(CONFIG_SMP) += smp.o
3obj-$(CONFIG_SPU_FS) += spufs/ spu_base.o
4builtin-spufs-$(CONFIG_SPU_FS) += spu_syscalls.o
5obj-y += $(builtin-spufs-m)
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
new file mode 100644
index 000000000000..9e9096590a07
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -0,0 +1,740 @@
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
23#define DEBUG 1
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>
35#include <asm/semaphore.h>
36#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;
65 out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
66}
67
68static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
69{
70 struct spu_priv2 __iomem *priv2;
71 struct mm_struct *mm;
72
73 pr_debug("%s\n", __FUNCTION__);
74
75 if (REGION_ID(ea) != USER_REGION_ID) {
76 pr_debug("invalid region access at %016lx\n", ea);
77 return 1;
78 }
79
80 priv2 = spu->priv2;
81 mm = spu->mm;
82
83 if (spu->slb_replace >= 8)
84 spu->slb_replace = 0;
85
86 out_be64(&priv2->slb_index_W, spu->slb_replace);
87 out_be64(&priv2->slb_vsid_RW,
88 (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT)
89 | SLB_VSID_USER);
90 out_be64(&priv2->slb_esid_RW, (ea & ESID_MASK) | SLB_ESID_V);
91
92 spu_restart_dma(spu);
93
94 pr_debug("set slb %d context %lx, ea %016lx, vsid %016lx, esid %016lx\n",
95 spu->slb_replace, mm->context.id, ea,
96 (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT)| SLB_VSID_USER,
97 (ea & ESID_MASK) | SLB_ESID_V);
98 return 0;
99}
100
101static int __spu_trap_data_map(struct spu *spu, unsigned long ea)
102{
103 unsigned long dsisr;
104 struct spu_priv1 __iomem *priv1;
105
106 pr_debug("%s\n", __FUNCTION__);
107 priv1 = spu->priv1;
108 dsisr = in_be64(&priv1->mfc_dsisr_RW);
109
110 wake_up(&spu->stop_wq);
111
112 return 0;
113}
114
115static int __spu_trap_mailbox(struct spu *spu)
116{
117 wake_up_all(&spu->ibox_wq);
118 kill_fasync(&spu->ibox_fasync, SIGIO, POLLIN);
119
120 /* atomically disable SPU mailbox interrupts */
121 spin_lock(&spu->register_lock);
122 out_be64(&spu->priv1->int_mask_class2_RW,
123 in_be64(&spu->priv1->int_mask_class2_RW) & ~0x1);
124 spin_unlock(&spu->register_lock);
125 return 0;
126}
127
128static int __spu_trap_stop(struct spu *spu)
129{
130 pr_debug("%s\n", __FUNCTION__);
131 spu->stop_code = in_be32(&spu->problem->spu_status_R);
132 wake_up(&spu->stop_wq);
133 return 0;
134}
135
136static int __spu_trap_halt(struct spu *spu)
137{
138 pr_debug("%s\n", __FUNCTION__);
139 spu->stop_code = in_be32(&spu->problem->spu_status_R);
140 wake_up(&spu->stop_wq);
141 return 0;
142}
143
144static int __spu_trap_tag_group(struct spu *spu)
145{
146 pr_debug("%s\n", __FUNCTION__);
147 /* wake_up(&spu->dma_wq); */
148 return 0;
149}
150
151static int __spu_trap_spubox(struct spu *spu)
152{
153 wake_up_all(&spu->wbox_wq);
154 kill_fasync(&spu->wbox_fasync, SIGIO, POLLOUT);
155
156 /* atomically disable SPU mailbox interrupts */
157 spin_lock(&spu->register_lock);
158 out_be64(&spu->priv1->int_mask_class2_RW,
159 in_be64(&spu->priv1->int_mask_class2_RW) & ~0x10);
160 spin_unlock(&spu->register_lock);
161 return 0;
162}
163
164static irqreturn_t
165spu_irq_class_0(int irq, void *data, struct pt_regs *regs)
166{
167 struct spu *spu;
168
169 spu = data;
170 spu->class_0_pending = 1;
171 wake_up(&spu->stop_wq);
172
173 return IRQ_HANDLED;
174}
175
176static int
177spu_irq_class_0_bottom(struct spu *spu)
178{
179 unsigned long stat;
180
181 spu->class_0_pending = 0;
182
183 stat = in_be64(&spu->priv1->int_stat_class0_RW);
184
185 if (stat & 1) /* invalid MFC DMA */
186 __spu_trap_invalid_dma(spu);
187
188 if (stat & 2) /* invalid DMA alignment */
189 __spu_trap_dma_align(spu);
190
191 if (stat & 4) /* error on SPU */
192 __spu_trap_error(spu);
193
194 out_be64(&spu->priv1->int_stat_class0_RW, stat);
195 return 0;
196}
197
198static irqreturn_t
199spu_irq_class_1(int irq, void *data, struct pt_regs *regs)
200{
201 struct spu *spu;
202 unsigned long stat, dar;
203
204 spu = data;
205 stat = in_be64(&spu->priv1->int_stat_class1_RW);
206 dar = in_be64(&spu->priv1->mfc_dar_RW);
207
208 if (stat & 1) /* segment fault */
209 __spu_trap_data_seg(spu, dar);
210
211 if (stat & 2) { /* mapping fault */
212 __spu_trap_data_map(spu, dar);
213 }
214
215 if (stat & 4) /* ls compare & suspend on get */
216 ;
217
218 if (stat & 8) /* ls compare & suspend on put */
219 ;
220
221 out_be64(&spu->priv1->int_stat_class1_RW, stat);
222 return stat ? IRQ_HANDLED : IRQ_NONE;
223}
224
225static irqreturn_t
226spu_irq_class_2(int irq, void *data, struct pt_regs *regs)
227{
228 struct spu *spu;
229 unsigned long stat;
230
231 spu = data;
232 stat = in_be64(&spu->priv1->int_stat_class2_RW);
233
234 pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat,
235 in_be64(&spu->priv1->int_mask_class2_RW));
236
237
238 if (stat & 1) /* PPC core mailbox */
239 __spu_trap_mailbox(spu);
240
241 if (stat & 2) /* SPU stop-and-signal */
242 __spu_trap_stop(spu);
243
244 if (stat & 4) /* SPU halted */
245 __spu_trap_halt(spu);
246
247 if (stat & 8) /* DMA tag group complete */
248 __spu_trap_tag_group(spu);
249
250 if (stat & 0x10) /* SPU mailbox threshold */
251 __spu_trap_spubox(spu);
252
253 out_be64(&spu->priv1->int_stat_class2_RW, stat);
254 return stat ? IRQ_HANDLED : IRQ_NONE;
255}
256
257static int
258spu_request_irqs(struct spu *spu)
259{
260 int ret;
261 int irq_base;
262
263 irq_base = IIC_NODE_STRIDE * spu->node + IIC_SPE_OFFSET;
264
265 snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0", spu->number);
266 ret = request_irq(irq_base + spu->isrc,
267 spu_irq_class_0, 0, spu->irq_c0, spu);
268 if (ret)
269 goto out;
270 out_be64(&spu->priv1->int_mask_class0_RW, 0x7);
271
272 snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1", spu->number);
273 ret = request_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc,
274 spu_irq_class_1, 0, spu->irq_c1, spu);
275 if (ret)
276 goto out1;
277 out_be64(&spu->priv1->int_mask_class1_RW, 0x3);
278
279 snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2", spu->number);
280 ret = request_irq(irq_base + 2*IIC_CLASS_STRIDE + spu->isrc,
281 spu_irq_class_2, 0, spu->irq_c2, spu);
282 if (ret)
283 goto out2;
284 out_be64(&spu->priv1->int_mask_class2_RW, 0xe);
285 goto out;
286
287out2:
288 free_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc, spu);
289out1:
290 free_irq(irq_base + spu->isrc, spu);
291out:
292 return ret;
293}
294
295static void
296spu_free_irqs(struct spu *spu)
297{
298 int irq_base;
299
300 irq_base = IIC_NODE_STRIDE * spu->node + IIC_SPE_OFFSET;
301
302 free_irq(irq_base + spu->isrc, spu);
303 free_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc, spu);
304 free_irq(irq_base + 2*IIC_CLASS_STRIDE + spu->isrc, spu);
305}
306
307static LIST_HEAD(spu_list);
308static DECLARE_MUTEX(spu_mutex);
309
310static void spu_init_channels(struct spu *spu)
311{
312 static const struct {
313 unsigned channel;
314 unsigned count;
315 } zero_list[] = {
316 { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, },
317 { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, },
318 }, count_list[] = {
319 { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, },
320 { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, },
321 { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, },
322 };
323 struct spu_priv2 *priv2;
324 int i;
325
326 priv2 = spu->priv2;
327
328 /* initialize all channel data to zero */
329 for (i = 0; i < ARRAY_SIZE(zero_list); i++) {
330 int count;
331
332 out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel);
333 for (count = 0; count < zero_list[i].count; count++)
334 out_be64(&priv2->spu_chnldata_RW, 0);
335 }
336
337 /* initialize channel counts to meaningful values */
338 for (i = 0; i < ARRAY_SIZE(count_list); i++) {
339 out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel);
340 out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count);
341 }
342}
343
344static void spu_init_regs(struct spu *spu)
345{
346 out_be64(&spu->priv1->int_mask_class0_RW, 0x7);
347 out_be64(&spu->priv1->int_mask_class1_RW, 0x3);
348 out_be64(&spu->priv1->int_mask_class2_RW, 0xe);
349}
350
351struct spu *spu_alloc(void)
352{
353 struct spu *spu;
354
355 down(&spu_mutex);
356 if (!list_empty(&spu_list)) {
357 spu = list_entry(spu_list.next, struct spu, list);
358 list_del_init(&spu->list);
359 pr_debug("Got SPU %x %d\n", spu->isrc, spu->number);
360 } else {
361 pr_debug("No SPU left\n");
362 spu = NULL;
363 }
364 up(&spu_mutex);
365
366 if (spu) {
367 spu_init_channels(spu);
368 spu_init_regs(spu);
369 }
370
371 return spu;
372}
373EXPORT_SYMBOL(spu_alloc);
374
375void spu_free(struct spu *spu)
376{
377 down(&spu_mutex);
378 spu->ibox_fasync = NULL;
379 spu->wbox_fasync = NULL;
380 list_add_tail(&spu->list, &spu_list);
381 up(&spu_mutex);
382}
383EXPORT_SYMBOL(spu_free);
384
385extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX
386static int spu_handle_mm_fault(struct spu *spu)
387{
388 struct spu_priv1 __iomem *priv1;
389 struct mm_struct *mm = spu->mm;
390 struct vm_area_struct *vma;
391 u64 ea, dsisr, is_write;
392 int ret;
393
394 priv1 = spu->priv1;
395 ea = in_be64(&priv1->mfc_dar_RW);
396 dsisr = in_be64(&priv1->mfc_dsisr_RW);
397#if 0
398 if (!IS_VALID_EA(ea)) {
399 return -EFAULT;
400 }
401#endif /* XXX */
402 if (mm == NULL) {
403 return -EFAULT;
404 }
405 if (mm->pgd == NULL) {
406 return -EFAULT;
407 }
408
409 down_read(&mm->mmap_sem);
410 vma = find_vma(mm, ea);
411 if (!vma)
412 goto bad_area;
413 if (vma->vm_start <= ea)
414 goto good_area;
415 if (!(vma->vm_flags & VM_GROWSDOWN))
416 goto bad_area;
417#if 0
418 if (expand_stack(vma, ea))
419 goto bad_area;
420#endif /* XXX */
421good_area:
422 is_write = dsisr & MFC_DSISR_ACCESS_PUT;
423 if (is_write) {
424 if (!(vma->vm_flags & VM_WRITE))
425 goto bad_area;
426 } else {
427 if (dsisr & MFC_DSISR_ACCESS_DENIED)
428 goto bad_area;
429 if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
430 goto bad_area;
431 }
432 ret = 0;
433 switch (handle_mm_fault(mm, vma, ea, is_write)) {
434 case VM_FAULT_MINOR:
435 current->min_flt++;
436 break;
437 case VM_FAULT_MAJOR:
438 current->maj_flt++;
439 break;
440 case VM_FAULT_SIGBUS:
441 ret = -EFAULT;
442 goto bad_area;
443 case VM_FAULT_OOM:
444 ret = -ENOMEM;
445 goto bad_area;
446 default:
447 BUG();
448 }
449 up_read(&mm->mmap_sem);
450 return ret;
451
452bad_area:
453 up_read(&mm->mmap_sem);
454 return -EFAULT;
455}
456
457static int spu_handle_pte_fault(struct spu *spu)
458{
459 struct spu_priv1 __iomem *priv1;
460 u64 ea, dsisr, access, error = 0UL;
461 int ret = 0;
462
463 priv1 = spu->priv1;
464 ea = in_be64(&priv1->mfc_dar_RW);
465 dsisr = in_be64(&priv1->mfc_dsisr_RW);
466 access = (_PAGE_PRESENT | _PAGE_USER);
467 if (dsisr & MFC_DSISR_PTE_NOT_FOUND) {
468 if (hash_page(ea, access, 0x300) != 0)
469 error |= CLASS1_ENABLE_STORAGE_FAULT_INTR;
470 }
471 if ((error & CLASS1_ENABLE_STORAGE_FAULT_INTR) ||
472 (dsisr & MFC_DSISR_ACCESS_DENIED)) {
473 if ((ret = spu_handle_mm_fault(spu)) != 0)
474 error |= CLASS1_ENABLE_STORAGE_FAULT_INTR;
475 else
476 error &= ~CLASS1_ENABLE_STORAGE_FAULT_INTR;
477 }
478 if (!error)
479 spu_restart_dma(spu);
480
481 return ret;
482}
483
484int spu_run(struct spu *spu)
485{
486 struct spu_problem __iomem *prob;
487 struct spu_priv1 __iomem *priv1;
488 struct spu_priv2 __iomem *priv2;
489 unsigned long status;
490 int ret;
491
492 prob = spu->problem;
493 priv1 = spu->priv1;
494 priv2 = spu->priv2;
495
496 /* Let SPU run. */
497 spu->mm = current->mm;
498 eieio();
499 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE);
500
501 do {
502 ret = wait_event_interruptible(spu->stop_wq,
503 (!((status = in_be32(&prob->spu_status_R)) & 0x1))
504 || (in_be64(&priv1->mfc_dsisr_RW) & MFC_DSISR_PTE_NOT_FOUND)
505 || spu->class_0_pending);
506
507 if (status & SPU_STATUS_STOPPED_BY_STOP)
508 ret = -EAGAIN;
509 else if (status & SPU_STATUS_STOPPED_BY_HALT)
510 ret = -EIO;
511 else if (in_be64(&priv1->mfc_dsisr_RW) & MFC_DSISR_PTE_NOT_FOUND)
512 ret = spu_handle_pte_fault(spu);
513
514 if (spu->class_0_pending)
515 spu_irq_class_0_bottom(spu);
516
517 if (!ret && signal_pending(current))
518 ret = -ERESTARTSYS;
519
520 } while (!ret);
521
522 /* Ensure SPU is stopped. */
523 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP);
524 eieio();
525 while (in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING)
526 cpu_relax();
527
528 out_be64(&priv2->slb_invalidate_all_W, 0);
529 out_be64(&priv1->tlb_invalidate_entry_W, 0UL);
530 eieio();
531
532 spu->mm = NULL;
533
534 /* Check for SPU breakpoint. */
535 if (unlikely(current->ptrace & PT_PTRACED)) {
536 status = in_be32(&prob->spu_status_R);
537
538 if ((status & SPU_STATUS_STOPPED_BY_STOP)
539 && status >> SPU_STOP_STATUS_SHIFT == 0x3fff) {
540 force_sig(SIGTRAP, current);
541 ret = -ERESTARTSYS;
542 }
543 }
544
545 return ret;
546}
547EXPORT_SYMBOL(spu_run);
548
549static void __iomem * __init map_spe_prop(struct device_node *n,
550 const char *name)
551{
552 struct address_prop {
553 unsigned long address;
554 unsigned int len;
555 } __attribute__((packed)) *prop;
556
557 void *p;
558 int proplen;
559
560 p = get_property(n, name, &proplen);
561 if (proplen != sizeof (struct address_prop))
562 return NULL;
563
564 prop = p;
565
566 return ioremap(prop->address, prop->len);
567}
568
569static void spu_unmap(struct spu *spu)
570{
571 iounmap(spu->priv2);
572 iounmap(spu->priv1);
573 iounmap(spu->problem);
574 iounmap((u8 __iomem *)spu->local_store);
575}
576
577static int __init spu_map_device(struct spu *spu, struct device_node *spe)
578{
579 char *prop;
580 int ret;
581
582 ret = -ENODEV;
583 prop = get_property(spe, "isrc", NULL);
584 if (!prop)
585 goto out;
586 spu->isrc = *(unsigned int *)prop;
587
588 spu->name = get_property(spe, "name", NULL);
589 if (!spu->name)
590 goto out;
591
592 prop = get_property(spe, "local-store", NULL);
593 if (!prop)
594 goto out;
595 spu->local_store_phys = *(unsigned long *)prop;
596
597 /* we use local store as ram, not io memory */
598 spu->local_store = (void __force *)map_spe_prop(spe, "local-store");
599 if (!spu->local_store)
600 goto out;
601
602 spu->problem= map_spe_prop(spe, "problem");
603 if (!spu->problem)
604 goto out_unmap;
605
606 spu->priv1= map_spe_prop(spe, "priv1");
607 if (!spu->priv1)
608 goto out_unmap;
609
610 spu->priv2= map_spe_prop(spe, "priv2");
611 if (!spu->priv2)
612 goto out_unmap;
613 ret = 0;
614 goto out;
615
616out_unmap:
617 spu_unmap(spu);
618out:
619 return ret;
620}
621
622static int __init find_spu_node_id(struct device_node *spe)
623{
624 unsigned int *id;
625 struct device_node *cpu;
626
627 cpu = spe->parent->parent;
628 id = (unsigned int *)get_property(cpu, "node-id", NULL);
629
630 return id ? *id : 0;
631}
632
633static int __init create_spu(struct device_node *spe)
634{
635 struct spu *spu;
636 int ret;
637 static int number;
638
639 ret = -ENOMEM;
640 spu = kmalloc(sizeof (*spu), GFP_KERNEL);
641 if (!spu)
642 goto out;
643
644 ret = spu_map_device(spu, spe);
645 if (ret)
646 goto out_free;
647
648 spu->node = find_spu_node_id(spe);
649 spu->stop_code = 0;
650 spu->slb_replace = 0;
651 spu->mm = NULL;
652 spu->class_0_pending = 0;
653 spin_lock_init(&spu->register_lock);
654
655 out_be64(&spu->priv1->mfc_sdr_RW, mfspr(SPRN_SDR1));
656 out_be64(&spu->priv1->mfc_sr1_RW, 0x33);
657
658 init_waitqueue_head(&spu->stop_wq);
659 init_waitqueue_head(&spu->wbox_wq);
660 init_waitqueue_head(&spu->ibox_wq);
661
662 spu->ibox_fasync = NULL;
663 spu->wbox_fasync = NULL;
664
665 down(&spu_mutex);
666 spu->number = number++;
667 ret = spu_request_irqs(spu);
668 if (ret)
669 goto out_unmap;
670
671 list_add(&spu->list, &spu_list);
672 up(&spu_mutex);
673
674 pr_debug(KERN_DEBUG "Using SPE %s %02x %p %p %p %p %d\n",
675 spu->name, spu->isrc, spu->local_store,
676 spu->problem, spu->priv1, spu->priv2, spu->number);
677 goto out;
678
679out_unmap:
680 up(&spu_mutex);
681 spu_unmap(spu);
682out_free:
683 kfree(spu);
684out:
685 return ret;
686}
687
688static void destroy_spu(struct spu *spu)
689{
690 list_del_init(&spu->list);
691
692 spu_free_irqs(spu);
693 spu_unmap(spu);
694 kfree(spu);
695}
696
697static void cleanup_spu_base(void)
698{
699 struct spu *spu, *tmp;
700 down(&spu_mutex);
701 list_for_each_entry_safe(spu, tmp, &spu_list, list)
702 destroy_spu(spu);
703 up(&spu_mutex);
704}
705module_exit(cleanup_spu_base);
706
707static int __init init_spu_base(void)
708{
709 struct device_node *node;
710 int ret;
711
712 ret = -ENODEV;
713 for (node = of_find_node_by_type(NULL, "spe");
714 node; node = of_find_node_by_type(node, "spe")) {
715 ret = create_spu(node);
716 if (ret) {
717 printk(KERN_WARNING "%s: Error initializing %s\n",
718 __FUNCTION__, node->name);
719 cleanup_spu_base();
720 break;
721 }
722 }
723 /* in some old firmware versions, the spe is called 'spc', so we
724 look for that as well */
725 for (node = of_find_node_by_type(NULL, "spc");
726 node; node = of_find_node_by_type(node, "spc")) {
727 ret = create_spu(node);
728 if (ret) {
729 printk(KERN_WARNING "%s: Error initializing %s\n",
730 __FUNCTION__, node->name);
731 cleanup_spu_base();
732 break;
733 }
734 }
735 return ret;
736}
737module_init(init_spu_base);
738
739MODULE_LICENSE("GPL");
740MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
diff --git a/arch/powerpc/platforms/cell/spu_syscalls.c b/arch/powerpc/platforms/cell/spu_syscalls.c
new file mode 100644
index 000000000000..43e0b187ffde
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spu_syscalls.c
@@ -0,0 +1,86 @@
1/*
2 * SPU file system -- system call stubs
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#include <linux/file.h>
23#include <linux/module.h>
24#include <linux/syscalls.h>
25
26#include <asm/spu.h>
27
28struct spufs_calls spufs_calls = {
29 .owner = NULL,
30};
31
32/* These stub syscalls are needed to have the actual implementation
33 * within a loadable module. When spufs is built into the kernel,
34 * this file is not used and the syscalls directly enter the fs code */
35
36asmlinkage long sys_spu_create(const char __user *name,
37 unsigned int flags, mode_t mode)
38{
39 long ret;
40
41 ret = -ENOSYS;
42 if (try_module_get(spufs_calls.owner)) {
43 ret = spufs_calls.create_thread(name, flags, mode);
44 module_put(spufs_calls.owner);
45 }
46 return ret;
47}
48
49asmlinkage long sys_spu_run(int fd, __u32 __user *unpc, __u32 __user *ustatus)
50{
51 long ret;
52 struct file *filp;
53 int fput_needed;
54
55 ret = -ENOSYS;
56 if (try_module_get(spufs_calls.owner)) {
57 ret = -EBADF;
58 filp = fget_light(fd, &fput_needed);
59 if (filp) {
60 ret = spufs_calls.spu_run(filp, unpc, ustatus);
61 fput_light(filp, fput_needed);
62 }
63 module_put(spufs_calls.owner);
64 }
65 return ret;
66}
67
68int register_spu_syscalls(struct spufs_calls *calls)
69{
70 if (spufs_calls.owner)
71 return -EBUSY;
72
73 spufs_calls.create_thread = calls->create_thread;
74 spufs_calls.spu_run = calls->spu_run;
75 smp_mb();
76 spufs_calls.owner = calls->owner;
77 return 0;
78}
79EXPORT_SYMBOL_GPL(register_spu_syscalls);
80
81void unregister_spu_syscalls(struct spufs_calls *calls)
82{
83 BUG_ON(spufs_calls.owner != calls->owner);
84 spufs_calls.owner = NULL;
85}
86EXPORT_SYMBOL_GPL(unregister_spu_syscalls);
diff --git a/arch/powerpc/platforms/cell/spufs/Makefile b/arch/powerpc/platforms/cell/spufs/Makefile
new file mode 100644
index 000000000000..6f496e37bcb7
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/Makefile
@@ -0,0 +1,3 @@
1obj-$(CONFIG_SPU_FS) += spufs.o
2
3spufs-y += inode.o file.o context.o syscalls.o
diff --git a/arch/powerpc/platforms/cell/spufs/context.c b/arch/powerpc/platforms/cell/spufs/context.c
new file mode 100644
index 000000000000..a69b85e2778a
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/context.c
@@ -0,0 +1,67 @@
1/*
2 * SPU file system -- SPU context management
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
23#include <linux/slab.h>
24#include <asm/spu.h>
25#include "spufs.h"
26
27struct spu_context *alloc_spu_context(void)
28{
29 struct spu_context *ctx;
30 ctx = kmalloc(sizeof *ctx, GFP_KERNEL);
31 if (!ctx)
32 goto out;
33 ctx->spu = spu_alloc();
34 if (!ctx->spu)
35 goto out_free;
36 init_rwsem(&ctx->backing_sema);
37 spin_lock_init(&ctx->mmio_lock);
38 kref_init(&ctx->kref);
39 goto out;
40out_free:
41 kfree(ctx);
42 ctx = NULL;
43out:
44 return ctx;
45}
46
47void destroy_spu_context(struct kref *kref)
48{
49 struct spu_context *ctx;
50 ctx = container_of(kref, struct spu_context, kref);
51 if (ctx->spu)
52 spu_free(ctx->spu);
53 kfree(ctx);
54}
55
56struct spu_context * get_spu_context(struct spu_context *ctx)
57{
58 kref_get(&ctx->kref);
59 return ctx;
60}
61
62int put_spu_context(struct spu_context *ctx)
63{
64 return kref_put(&ctx->kref, &destroy_spu_context);
65}
66
67
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
new file mode 100644
index 000000000000..c1e643310494
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -0,0 +1,596 @@
1/*
2 * SPU file system -- file contents
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
23#include <linux/fs.h>
24#include <linux/ioctl.h>
25#include <linux/module.h>
26#include <linux/poll.h>
27
28#include <asm/io.h>
29#include <asm/semaphore.h>
30#include <asm/spu.h>
31#include <asm/uaccess.h>
32
33#include "spufs.h"
34
35static int
36spufs_mem_open(struct inode *inode, struct file *file)
37{
38 struct spufs_inode_info *i = SPUFS_I(inode);
39 file->private_data = i->i_ctx;
40 return 0;
41}
42
43static ssize_t
44spufs_mem_read(struct file *file, char __user *buffer,
45 size_t size, loff_t *pos)
46{
47 struct spu *spu;
48 struct spu_context *ctx;
49 int ret;
50
51 ctx = file->private_data;
52 spu = ctx->spu;
53
54 down_read(&ctx->backing_sema);
55 if (spu->number & 0/*1*/) {
56 ret = generic_file_read(file, buffer, size, pos);
57 goto out;
58 }
59
60 ret = simple_read_from_buffer(buffer, size, pos,
61 spu->local_store, LS_SIZE);
62out:
63 up_read(&ctx->backing_sema);
64 return ret;
65}
66
67static ssize_t
68spufs_mem_write(struct file *file, const char __user *buffer,
69 size_t size, loff_t *pos)
70{
71 struct spu_context *ctx = file->private_data;
72 struct spu *spu = ctx->spu;
73
74 if (spu->number & 0) //1)
75 return generic_file_write(file, buffer, size, pos);
76
77 size = min_t(ssize_t, LS_SIZE - *pos, size);
78 if (size <= 0)
79 return -EFBIG;
80 *pos += size;
81 return copy_from_user(spu->local_store + *pos - size,
82 buffer, size) ? -EFAULT : size;
83}
84
85static int
86spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
87{
88 struct spu_context *ctx = file->private_data;
89 struct spu *spu = ctx->spu;
90 unsigned long pfn;
91
92 if (spu->number & 0) //1)
93 return generic_file_mmap(file, vma);
94
95 vma->vm_flags |= VM_RESERVED;
96 vma->vm_page_prot = __pgprot(pgprot_val (vma->vm_page_prot)
97 | _PAGE_NO_CACHE);
98 pfn = spu->local_store_phys >> PAGE_SHIFT;
99 /*
100 * This will work for actual SPUs, but not for vmalloc memory:
101 */
102 if (remap_pfn_range(vma, vma->vm_start, pfn,
103 vma->vm_end-vma->vm_start, vma->vm_page_prot))
104 return -EAGAIN;
105 return 0;
106}
107
108static struct file_operations spufs_mem_fops = {
109 .open = spufs_mem_open,
110 .read = spufs_mem_read,
111 .write = spufs_mem_write,
112 .mmap = spufs_mem_mmap,
113 .llseek = generic_file_llseek,
114};
115
116/* generic open function for all pipe-like files */
117static int spufs_pipe_open(struct inode *inode, struct file *file)
118{
119 struct spufs_inode_info *i = SPUFS_I(inode);
120 file->private_data = i->i_ctx;
121
122 return nonseekable_open(inode, file);
123}
124
125static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
126 size_t len, loff_t *pos)
127{
128 struct spu_context *ctx;
129 struct spu_problem __iomem *prob;
130 u32 mbox_stat;
131 u32 mbox_data;
132
133 if (len < 4)
134 return -EINVAL;
135
136 ctx = file->private_data;
137 prob = ctx->spu->problem;
138 mbox_stat = in_be32(&prob->mb_stat_R);
139 if (!(mbox_stat & 0x0000ff))
140 return -EAGAIN;
141
142 mbox_data = in_be32(&prob->pu_mb_R);
143
144 if (copy_to_user(buf, &mbox_data, sizeof mbox_data))
145 return -EFAULT;
146
147 return 4;
148}
149
150static struct file_operations spufs_mbox_fops = {
151 .open = spufs_pipe_open,
152 .read = spufs_mbox_read,
153};
154
155static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf,
156 size_t len, loff_t *pos)
157{
158 struct spu_context *ctx;
159 u32 mbox_stat;
160
161 if (len < 4)
162 return -EINVAL;
163
164 ctx = file->private_data;
165 mbox_stat = in_be32(&ctx->spu->problem->mb_stat_R) & 0xff;
166
167 if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat))
168 return -EFAULT;
169
170 return 4;
171}
172
173static struct file_operations spufs_mbox_stat_fops = {
174 .open = spufs_pipe_open,
175 .read = spufs_mbox_stat_read,
176};
177
178/* low-level ibox access function */
179size_t spu_ibox_read(struct spu *spu, u32 *data)
180{
181 int ret;
182
183 spin_lock_irq(&spu->register_lock);
184
185 if (in_be32(&spu->problem->mb_stat_R) & 0xff0000) {
186 /* read the first available word */
187 *data = in_be64(&spu->priv2->puint_mb_R);
188 ret = 4;
189 } else {
190 /* make sure we get woken up by the interrupt */
191 out_be64(&spu->priv1->int_mask_class2_RW,
192 in_be64(&spu->priv1->int_mask_class2_RW) | 0x1);
193 ret = 0;
194 }
195
196 spin_unlock_irq(&spu->register_lock);
197 return ret;
198}
199EXPORT_SYMBOL(spu_ibox_read);
200
201static int spufs_ibox_fasync(int fd, struct file *file, int on)
202{
203 struct spu_context *ctx;
204 ctx = file->private_data;
205 return fasync_helper(fd, file, on, &ctx->spu->ibox_fasync);
206}
207
208static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
209 size_t len, loff_t *pos)
210{
211 struct spu_context *ctx;
212 u32 ibox_data;
213 ssize_t ret;
214
215 if (len < 4)
216 return -EINVAL;
217
218 ctx = file->private_data;
219
220 ret = 0;
221 if (file->f_flags & O_NONBLOCK) {
222 if (!spu_ibox_read(ctx->spu, &ibox_data))
223 ret = -EAGAIN;
224 } else {
225 ret = wait_event_interruptible(ctx->spu->ibox_wq,
226 spu_ibox_read(ctx->spu, &ibox_data));
227 }
228
229 if (ret)
230 return ret;
231
232 ret = 4;
233 if (copy_to_user(buf, &ibox_data, sizeof ibox_data))
234 ret = -EFAULT;
235
236 return ret;
237}
238
239static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
240{
241 struct spu_context *ctx;
242 struct spu_problem __iomem *prob;
243 u32 mbox_stat;
244 unsigned int mask;
245
246 ctx = file->private_data;
247 prob = ctx->spu->problem;
248 mbox_stat = in_be32(&prob->mb_stat_R);
249
250 poll_wait(file, &ctx->spu->ibox_wq, wait);
251
252 mask = 0;
253 if (mbox_stat & 0xff0000)
254 mask |= POLLIN | POLLRDNORM;
255
256 return mask;
257}
258
259static struct file_operations spufs_ibox_fops = {
260 .open = spufs_pipe_open,
261 .read = spufs_ibox_read,
262 .poll = spufs_ibox_poll,
263 .fasync = spufs_ibox_fasync,
264};
265
266static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf,
267 size_t len, loff_t *pos)
268{
269 struct spu_context *ctx;
270 u32 ibox_stat;
271
272 if (len < 4)
273 return -EINVAL;
274
275 ctx = file->private_data;
276 ibox_stat = (in_be32(&ctx->spu->problem->mb_stat_R) >> 16) & 0xff;
277
278 if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat))
279 return -EFAULT;
280
281 return 4;
282}
283
284static struct file_operations spufs_ibox_stat_fops = {
285 .open = spufs_pipe_open,
286 .read = spufs_ibox_stat_read,
287};
288
289/* low-level mailbox write */
290size_t spu_wbox_write(struct spu *spu, u32 data)
291{
292 int ret;
293
294 spin_lock_irq(&spu->register_lock);
295
296 if (in_be32(&spu->problem->mb_stat_R) & 0x00ff00) {
297 /* we have space to write wbox_data to */
298 out_be32(&spu->problem->spu_mb_W, data);
299 ret = 4;
300 } else {
301 /* make sure we get woken up by the interrupt when space
302 becomes available */
303 out_be64(&spu->priv1->int_mask_class2_RW,
304 in_be64(&spu->priv1->int_mask_class2_RW) | 0x10);
305 ret = 0;
306 }
307
308 spin_unlock_irq(&spu->register_lock);
309 return ret;
310}
311EXPORT_SYMBOL(spu_wbox_write);
312
313static int spufs_wbox_fasync(int fd, struct file *file, int on)
314{
315 struct spu_context *ctx;
316 ctx = file->private_data;
317 return fasync_helper(fd, file, on, &ctx->spu->wbox_fasync);
318}
319
320static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
321 size_t len, loff_t *pos)
322{
323 struct spu_context *ctx;
324 u32 wbox_data;
325 int ret;
326
327 if (len < 4)
328 return -EINVAL;
329
330 ctx = file->private_data;
331
332 if (copy_from_user(&wbox_data, buf, sizeof wbox_data))
333 return -EFAULT;
334
335 ret = 0;
336 if (file->f_flags & O_NONBLOCK) {
337 if (!spu_wbox_write(ctx->spu, wbox_data))
338 ret = -EAGAIN;
339 } else {
340 ret = wait_event_interruptible(ctx->spu->wbox_wq,
341 spu_wbox_write(ctx->spu, wbox_data));
342 }
343
344 return ret ? ret : sizeof wbox_data;
345}
346
347static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
348{
349 struct spu_context *ctx;
350 struct spu_problem __iomem *prob;
351 u32 mbox_stat;
352 unsigned int mask;
353
354 ctx = file->private_data;
355 prob = ctx->spu->problem;
356 mbox_stat = in_be32(&prob->mb_stat_R);
357
358 poll_wait(file, &ctx->spu->wbox_wq, wait);
359
360 mask = 0;
361 if (mbox_stat & 0x00ff00)
362 mask = POLLOUT | POLLWRNORM;
363
364 return mask;
365}
366
367static struct file_operations spufs_wbox_fops = {
368 .open = spufs_pipe_open,
369 .write = spufs_wbox_write,
370 .poll = spufs_wbox_poll,
371 .fasync = spufs_wbox_fasync,
372};
373
374static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf,
375 size_t len, loff_t *pos)
376{
377 struct spu_context *ctx;
378 u32 wbox_stat;
379
380 if (len < 4)
381 return -EINVAL;
382
383 ctx = file->private_data;
384 wbox_stat = (in_be32(&ctx->spu->problem->mb_stat_R) >> 8) & 0xff;
385
386 if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat))
387 return -EFAULT;
388
389 return 4;
390}
391
392static struct file_operations spufs_wbox_stat_fops = {
393 .open = spufs_pipe_open,
394 .read = spufs_wbox_stat_read,
395};
396
397long spufs_run_spu(struct file *file, struct spu_context *ctx,
398 u32 *npc, u32 *status)
399{
400 struct spu_problem __iomem *prob;
401 int ret;
402
403 if (file->f_flags & O_NONBLOCK) {
404 ret = -EAGAIN;
405 if (!down_write_trylock(&ctx->backing_sema))
406 goto out;
407 } else {
408 down_write(&ctx->backing_sema);
409 }
410
411 prob = ctx->spu->problem;
412 out_be32(&prob->spu_npc_RW, *npc);
413
414 ret = spu_run(ctx->spu);
415
416 *status = in_be32(&prob->spu_status_R);
417 *npc = in_be32(&prob->spu_npc_RW);
418
419 up_write(&ctx->backing_sema);
420
421out:
422 return ret;
423}
424
425static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
426 size_t len, loff_t *pos)
427{
428 struct spu_context *ctx;
429 struct spu_problem *prob;
430 u32 data;
431
432 ctx = file->private_data;
433 prob = ctx->spu->problem;
434
435 if (len < 4)
436 return -EINVAL;
437
438 data = in_be32(&prob->signal_notify1);
439 if (copy_to_user(buf, &data, 4))
440 return -EFAULT;
441
442 return 4;
443}
444
445static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
446 size_t len, loff_t *pos)
447{
448 struct spu_context *ctx;
449 struct spu_problem *prob;
450 u32 data;
451
452 ctx = file->private_data;
453 prob = ctx->spu->problem;
454
455 if (len < 4)
456 return -EINVAL;
457
458 if (copy_from_user(&data, buf, 4))
459 return -EFAULT;
460
461 out_be32(&prob->signal_notify1, data);
462
463 return 4;
464}
465
466static struct file_operations spufs_signal1_fops = {
467 .open = spufs_pipe_open,
468 .read = spufs_signal1_read,
469 .write = spufs_signal1_write,
470};
471
472static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
473 size_t len, loff_t *pos)
474{
475 struct spu_context *ctx;
476 struct spu_problem *prob;
477 u32 data;
478
479 ctx = file->private_data;
480 prob = ctx->spu->problem;
481
482 if (len < 4)
483 return -EINVAL;
484
485 data = in_be32(&prob->signal_notify2);
486 if (copy_to_user(buf, &data, 4))
487 return -EFAULT;
488
489 return 4;
490}
491
492static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
493 size_t len, loff_t *pos)
494{
495 struct spu_context *ctx;
496 struct spu_problem *prob;
497 u32 data;
498
499 ctx = file->private_data;
500 prob = ctx->spu->problem;
501
502 if (len < 4)
503 return -EINVAL;
504
505 if (copy_from_user(&data, buf, 4))
506 return -EFAULT;
507
508 out_be32(&prob->signal_notify2, data);
509
510 return 4;
511}
512
513static struct file_operations spufs_signal2_fops = {
514 .open = spufs_pipe_open,
515 .read = spufs_signal2_read,
516 .write = spufs_signal2_write,
517};
518
519static void spufs_signal1_type_set(void *data, u64 val)
520{
521 struct spu_context *ctx = data;
522 struct spu_priv2 *priv2 = ctx->spu->priv2;
523 u64 tmp;
524
525 spin_lock_irq(&ctx->spu->register_lock);
526 tmp = in_be64(&priv2->spu_cfg_RW);
527 if (val)
528 tmp |= 1;
529 else
530 tmp &= ~1;
531 out_be64(&priv2->spu_cfg_RW, tmp);
532 spin_unlock_irq(&ctx->spu->register_lock);
533}
534
535static u64 spufs_signal1_type_get(void *data)
536{
537 struct spu_context *ctx = data;
538 return (in_be64(&ctx->spu->priv2->spu_cfg_RW) & 1) != 0;
539}
540DEFINE_SIMPLE_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
541 spufs_signal1_type_set, "%llu");
542
543static void spufs_signal2_type_set(void *data, u64 val)
544{
545 struct spu_context *ctx = data;
546 struct spu_priv2 *priv2 = ctx->spu->priv2;
547 u64 tmp;
548
549 spin_lock_irq(&ctx->spu->register_lock);
550 tmp = in_be64(&priv2->spu_cfg_RW);
551 if (val)
552 tmp |= 2;
553 else
554 tmp &= ~2;
555 out_be64(&priv2->spu_cfg_RW, tmp);
556 spin_unlock_irq(&ctx->spu->register_lock);
557}
558
559static u64 spufs_signal2_type_get(void *data)
560{
561 struct spu_context *ctx = data;
562 return (in_be64(&ctx->spu->priv2->spu_cfg_RW) & 2) != 0;
563}
564DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
565 spufs_signal2_type_set, "%llu");
566
567static void spufs_npc_set(void *data, u64 val)
568{
569 struct spu_context *ctx = data;
570 out_be32(&ctx->spu->problem->spu_npc_RW, val);
571}
572
573static u64 spufs_npc_get(void *data)
574{
575 struct spu_context *ctx = data;
576 u64 ret;
577 ret = in_be32(&ctx->spu->problem->spu_npc_RW);
578 return ret;
579}
580DEFINE_SIMPLE_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, "%llx\n")
581
582struct tree_descr spufs_dir_contents[] = {
583 { "mem", &spufs_mem_fops, 0666, },
584 { "mbox", &spufs_mbox_fops, 0444, },
585 { "ibox", &spufs_ibox_fops, 0444, },
586 { "wbox", &spufs_wbox_fops, 0222, },
587 { "mbox_stat", &spufs_mbox_stat_fops, 0444, },
588 { "ibox_stat", &spufs_ibox_stat_fops, 0444, },
589 { "wbox_stat", &spufs_wbox_stat_fops, 0444, },
590 { "signal1", &spufs_signal1_fops, 0666, },
591 { "signal2", &spufs_signal2_fops, 0666, },
592 { "signal1_type", &spufs_signal1_type, 0666, },
593 { "signal2_type", &spufs_signal2_type, 0666, },
594 { "npc", &spufs_npc_ops, 0666, },
595 {},
596};
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
new file mode 100644
index 000000000000..f7aa0a6b1ce5
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -0,0 +1,470 @@
1/*
2 * SPU file system
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
23#include <linux/file.h>
24#include <linux/fs.h>
25#include <linux/backing-dev.h>
26#include <linux/init.h>
27#include <linux/ioctl.h>
28#include <linux/module.h>
29#include <linux/namei.h>
30#include <linux/pagemap.h>
31#include <linux/poll.h>
32#include <linux/slab.h>
33#include <linux/parser.h>
34
35#include <asm/io.h>
36#include <asm/semaphore.h>
37#include <asm/spu.h>
38#include <asm/uaccess.h>
39
40#include "spufs.h"
41
42static kmem_cache_t *spufs_inode_cache;
43
44/* Information about the backing dev, same as ramfs */
45#if 0
46static struct backing_dev_info spufs_backing_dev_info = {
47 .ra_pages = 0, /* No readahead */
48 .capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK |
49 BDI_CAP_MAP_DIRECT | BDI_CAP_MAP_COPY | BDI_CAP_READ_MAP |
50 BDI_CAP_WRITE_MAP,
51};
52
53static struct address_space_operations spufs_aops = {
54 .readpage = simple_readpage,
55 .prepare_write = simple_prepare_write,
56 .commit_write = simple_commit_write,
57};
58#endif
59
60/* Inode operations */
61
62static struct inode *
63spufs_alloc_inode(struct super_block *sb)
64{
65 struct spufs_inode_info *ei;
66
67 ei = kmem_cache_alloc(spufs_inode_cache, SLAB_KERNEL);
68 if (!ei)
69 return NULL;
70 return &ei->vfs_inode;
71}
72
73static void
74spufs_destroy_inode(struct inode *inode)
75{
76 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode));
77}
78
79static void
80spufs_init_once(void *p, kmem_cache_t * cachep, unsigned long flags)
81{
82 struct spufs_inode_info *ei = p;
83
84 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
85 SLAB_CTOR_CONSTRUCTOR) {
86 inode_init_once(&ei->vfs_inode);
87 }
88}
89
90static struct inode *
91spufs_new_inode(struct super_block *sb, int mode)
92{
93 struct inode *inode;
94
95 inode = new_inode(sb);
96 if (!inode)
97 goto out;
98
99 inode->i_mode = mode;
100 inode->i_uid = current->fsuid;
101 inode->i_gid = current->fsgid;
102 inode->i_blksize = PAGE_CACHE_SIZE;
103 inode->i_blocks = 0;
104 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
105out:
106 return inode;
107}
108
109static int
110spufs_setattr(struct dentry *dentry, struct iattr *attr)
111{
112 struct inode *inode = dentry->d_inode;
113
114/* dump_stack();
115 pr_debug("ia_size %lld, i_size:%lld\n", attr->ia_size, inode->i_size);
116*/
117 if ((attr->ia_valid & ATTR_SIZE) &&
118 (attr->ia_size != inode->i_size))
119 return -EINVAL;
120 return inode_setattr(inode, attr);
121}
122
123
124static int
125spufs_new_file(struct super_block *sb, struct dentry *dentry,
126 struct file_operations *fops, int mode,
127 struct spu_context *ctx)
128{
129 static struct inode_operations spufs_file_iops = {
130 .getattr = simple_getattr,
131 .setattr = spufs_setattr,
132 .unlink = simple_unlink,
133 };
134 struct inode *inode;
135 int ret;
136
137 ret = -ENOSPC;
138 inode = spufs_new_inode(sb, S_IFREG | mode);
139 if (!inode)
140 goto out;
141
142 ret = 0;
143 inode->i_op = &spufs_file_iops;
144 inode->i_fop = fops;
145 inode->u.generic_ip = SPUFS_I(inode)->i_ctx = get_spu_context(ctx);
146 d_add(dentry, inode);
147out:
148 return ret;
149}
150
151static void
152spufs_delete_inode(struct inode *inode)
153{
154 if (SPUFS_I(inode)->i_ctx)
155 put_spu_context(SPUFS_I(inode)->i_ctx);
156 clear_inode(inode);
157}
158
159static int
160spufs_fill_dir(struct dentry *dir, struct tree_descr *files,
161 int mode, struct spu_context *ctx)
162{
163 struct dentry *dentry;
164 int ret;
165
166 while (files->name && files->name[0]) {
167 ret = -ENOMEM;
168 dentry = d_alloc_name(dir, files->name);
169 if (!dentry)
170 goto out;
171 ret = spufs_new_file(dir->d_sb, dentry, files->ops,
172 files->mode & mode, ctx);
173 if (ret)
174 goto out;
175 files++;
176 }
177 return 0;
178out:
179 // FIXME: remove all files that are left
180
181 return ret;
182}
183
184static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry)
185{
186 struct dentry *dentry;
187 int err;
188
189 spin_lock(&dcache_lock);
190 /* remove all entries */
191 err = 0;
192 list_for_each_entry(dentry, &dir_dentry->d_subdirs, d_child) {
193 if (d_unhashed(dentry) || !dentry->d_inode)
194 continue;
195 atomic_dec(&dentry->d_count);
196 spin_lock(&dentry->d_lock);
197 __d_drop(dentry);
198 spin_unlock(&dentry->d_lock);
199 }
200 spin_unlock(&dcache_lock);
201 if (!err) {
202 shrink_dcache_parent(dir_dentry);
203 err = simple_rmdir(root, dir_dentry);
204 }
205 return err;
206}
207
208static int spufs_dir_close(struct inode *inode, struct file *file)
209{
210 struct inode *dir;
211 struct dentry *dentry;
212 int ret;
213
214 dentry = file->f_dentry;
215 dir = dentry->d_parent->d_inode;
216 down(&dir->i_sem);
217 ret = spufs_rmdir(dir, file->f_dentry);
218 WARN_ON(ret);
219 up(&dir->i_sem);
220 return dcache_dir_close(inode, file);
221}
222
223struct inode_operations spufs_dir_inode_operations = {
224 .lookup = simple_lookup,
225};
226
227struct file_operations spufs_autodelete_dir_operations = {
228 .open = dcache_dir_open,
229 .release = spufs_dir_close,
230 .llseek = dcache_dir_lseek,
231 .read = generic_read_dir,
232 .readdir = dcache_readdir,
233 .fsync = simple_sync_file,
234};
235
236static int
237spufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
238{
239 int ret;
240 struct inode *inode;
241 struct spu_context *ctx;
242
243 ret = -ENOSPC;
244 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);
245 if (!inode)
246 goto out;
247
248 if (dir->i_mode & S_ISGID) {
249 inode->i_gid = dir->i_gid;
250 inode->i_mode &= S_ISGID;
251 }
252 ctx = alloc_spu_context();
253 SPUFS_I(inode)->i_ctx = ctx;
254 if (!ctx)
255 goto out_iput;
256
257 inode->i_op = &spufs_dir_inode_operations;
258 inode->i_fop = &simple_dir_operations;
259 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
260 if (ret)
261 goto out_free_ctx;
262
263 d_instantiate(dentry, inode);
264 dget(dentry);
265 dir->i_nlink++;
266 goto out;
267
268out_free_ctx:
269 put_spu_context(ctx);
270out_iput:
271 iput(inode);
272out:
273 return ret;
274}
275
276long
277spufs_create_thread(struct nameidata *nd, const char *name,
278 unsigned int flags, mode_t mode)
279{
280 struct dentry *dentry;
281 struct file *filp;
282 int ret;
283
284 /* need to be at the root of spufs */
285 ret = -EINVAL;
286 if (nd->dentry->d_sb->s_magic != SPUFS_MAGIC ||
287 nd->dentry != nd->dentry->d_sb->s_root)
288 goto out;
289
290 dentry = lookup_create(nd, 1);
291 ret = PTR_ERR(dentry);
292 if (IS_ERR(dentry))
293 goto out_dir;
294
295 ret = -EEXIST;
296 if (dentry->d_inode)
297 goto out_dput;
298
299 mode &= ~current->fs->umask;
300 ret = spufs_mkdir(nd->dentry->d_inode, dentry, mode & S_IRWXUGO);
301 if (ret)
302 goto out_dput;
303
304 ret = get_unused_fd();
305 if (ret < 0)
306 goto out_dput;
307
308 dentry->d_inode->i_nlink++;
309
310 filp = filp_open(name, O_RDONLY, mode);
311 if (IS_ERR(filp)) {
312 // FIXME: remove directory again
313 put_unused_fd(ret);
314 ret = PTR_ERR(filp);
315 } else {
316 filp->f_op = &spufs_autodelete_dir_operations;
317 fd_install(ret, filp);
318 }
319
320out_dput:
321 dput(dentry);
322out_dir:
323 up(&nd->dentry->d_inode->i_sem);
324out:
325 return ret;
326}
327
328/* File system initialization */
329enum {
330 Opt_uid, Opt_gid, Opt_err,
331};
332
333static match_table_t spufs_tokens = {
334 { Opt_uid, "uid=%d" },
335 { Opt_gid, "gid=%d" },
336 { Opt_err, NULL },
337};
338
339static int
340spufs_parse_options(char *options, struct inode *root)
341{
342 char *p;
343 substring_t args[MAX_OPT_ARGS];
344
345 while ((p = strsep(&options, ",")) != NULL) {
346 int token, option;
347
348 if (!*p)
349 continue;
350
351 token = match_token(p, spufs_tokens, args);
352 switch (token) {
353 case Opt_uid:
354 if (match_int(&args[0], &option))
355 return 0;
356 root->i_uid = option;
357 break;
358 case Opt_gid:
359 if (match_int(&args[0], &option))
360 return 0;
361 root->i_gid = option;
362 break;
363 default:
364 return 0;
365 }
366 }
367 return 1;
368}
369
370static int
371spufs_create_root(struct super_block *sb, void *data) {
372 struct inode *inode;
373 int ret;
374
375 ret = -ENOMEM;
376 inode = spufs_new_inode(sb, S_IFDIR | 0775);
377 if (!inode)
378 goto out;
379
380 inode->i_op = &spufs_dir_inode_operations;
381 inode->i_fop = &simple_dir_operations;
382 SPUFS_I(inode)->i_ctx = NULL;
383
384 ret = -EINVAL;
385 if (!spufs_parse_options(data, inode))
386 goto out_iput;
387
388 ret = -ENOMEM;
389 sb->s_root = d_alloc_root(inode);
390 if (!sb->s_root)
391 goto out_iput;
392
393 return 0;
394out_iput:
395 iput(inode);
396out:
397 return ret;
398}
399
400static int
401spufs_fill_super(struct super_block *sb, void *data, int silent)
402{
403 static struct super_operations s_ops = {
404 .alloc_inode = spufs_alloc_inode,
405 .destroy_inode = spufs_destroy_inode,
406 .statfs = simple_statfs,
407 .delete_inode = spufs_delete_inode,
408 .drop_inode = generic_delete_inode,
409 };
410
411 sb->s_maxbytes = MAX_LFS_FILESIZE;
412 sb->s_blocksize = PAGE_CACHE_SIZE;
413 sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
414 sb->s_magic = SPUFS_MAGIC;
415 sb->s_op = &s_ops;
416
417 return spufs_create_root(sb, data);
418}
419
420static struct super_block *
421spufs_get_sb(struct file_system_type *fstype, int flags,
422 const char *name, void *data)
423{
424 return get_sb_single(fstype, flags, data, spufs_fill_super);
425}
426
427static struct file_system_type spufs_type = {
428 .owner = THIS_MODULE,
429 .name = "spufs",
430 .get_sb = spufs_get_sb,
431 .kill_sb = kill_litter_super,
432};
433
434static int spufs_init(void)
435{
436 int ret;
437 ret = -ENOMEM;
438 spufs_inode_cache = kmem_cache_create("spufs_inode_cache",
439 sizeof(struct spufs_inode_info), 0,
440 SLAB_HWCACHE_ALIGN, spufs_init_once, NULL);
441
442 if (!spufs_inode_cache)
443 goto out;
444 ret = register_filesystem(&spufs_type);
445 if (ret)
446 goto out_cache;
447 ret = register_spu_syscalls(&spufs_calls);
448 if (ret)
449 goto out_fs;
450 return 0;
451out_fs:
452 unregister_filesystem(&spufs_type);
453out_cache:
454 kmem_cache_destroy(spufs_inode_cache);
455out:
456 return ret;
457}
458module_init(spufs_init);
459
460static void spufs_exit(void)
461{
462 unregister_spu_syscalls(&spufs_calls);
463 unregister_filesystem(&spufs_type);
464 kmem_cache_destroy(spufs_inode_cache);
465}
466module_exit(spufs_exit);
467
468MODULE_LICENSE("GPL");
469MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
470
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
new file mode 100644
index 000000000000..b37fe797ea1c
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -0,0 +1,71 @@
1/*
2 * SPU file system
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#ifndef SPUFS_H
23#define SPUFS_H
24
25#include <linux/kref.h>
26#include <linux/rwsem.h>
27#include <linux/spinlock.h>
28#include <linux/fs.h>
29
30#include <asm/spu.h>
31
32/* The magic number for our file system */
33enum {
34 SPUFS_MAGIC = 0x23c9b64e,
35};
36
37struct spu_context {
38 struct spu *spu; /* pointer to a physical SPU */
39 struct rw_semaphore backing_sema; /* protects the above */
40 spinlock_t mmio_lock; /* protects mmio access */
41
42 struct kref kref;
43};
44
45struct spufs_inode_info {
46 struct spu_context *i_ctx;
47 struct inode vfs_inode;
48};
49#define SPUFS_I(inode) \
50 container_of(inode, struct spufs_inode_info, vfs_inode)
51
52extern struct tree_descr spufs_dir_contents[];
53
54/* system call implementation */
55long spufs_run_spu(struct file *file,
56 struct spu_context *ctx, u32 *npc, u32 *status);
57long spufs_create_thread(struct nameidata *nd, const char *name,
58 unsigned int flags, mode_t mode);
59
60/* context management */
61struct spu_context * alloc_spu_context(void);
62void destroy_spu_context(struct kref *kref);
63struct spu_context * get_spu_context(struct spu_context *ctx);
64int put_spu_context(struct spu_context *ctx);
65
66void spu_acquire(struct spu_context *ctx);
67void spu_release(struct spu_context *ctx);
68void spu_acquire_runnable(struct spu_context *ctx);
69void spu_acquire_saved(struct spu_context *ctx);
70
71#endif
diff --git a/arch/powerpc/platforms/cell/spufs/syscalls.c b/arch/powerpc/platforms/cell/spufs/syscalls.c
new file mode 100644
index 000000000000..3f71bb5e9d8e
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/syscalls.c
@@ -0,0 +1,106 @@
1#include <linux/file.h>
2#include <linux/fs.h>
3#include <linux/module.h>
4#include <linux/mount.h>
5#include <linux/namei.h>
6
7#include <asm/uaccess.h>
8
9#include "spufs.h"
10
11/**
12 * sys_spu_run - run code loaded into an SPU
13 *
14 * @unpc: next program counter for the SPU
15 * @ustatus: status of the SPU
16 *
17 * This system call transfers the control of execution of a
18 * user space thread to an SPU. It will return when the
19 * SPU has finished executing or when it hits an error
20 * condition and it will be interrupted if a signal needs
21 * to be delivered to a handler in user space.
22 *
23 * The next program counter is set to the passed value
24 * before the SPU starts fetching code and the user space
25 * pointer gets updated with the new value when returning
26 * from kernel space.
27 *
28 * The status value returned from spu_run reflects the
29 * value of the spu_status register after the SPU has stopped.
30 *
31 */
32long do_spu_run(struct file *filp, __u32 __user *unpc, __u32 __user *ustatus)
33{
34 long ret;
35 struct spufs_inode_info *i;
36 u32 npc, status;
37
38 ret = -EFAULT;
39 if (get_user(npc, unpc))
40 goto out;
41
42 ret = -EINVAL;
43 if (filp->f_vfsmnt->mnt_sb->s_magic != SPUFS_MAGIC)
44 goto out;
45
46 i = SPUFS_I(filp->f_dentry->d_inode);
47 ret = spufs_run_spu(filp, i->i_ctx, &npc, &status);
48
49 if (ret ==-EAGAIN || ret == -EIO)
50 ret = status;
51
52 if (put_user(npc, unpc))
53 ret = -EFAULT;
54
55 if (ustatus && put_user(status, ustatus))
56 ret = -EFAULT;
57out:
58 return ret;
59}
60
61#ifndef MODULE
62asmlinkage long sys_spu_run(int fd, __u32 __user *unpc, __u32 __user *ustatus)
63{
64 int fput_needed;
65 struct file *filp;
66 long ret;
67
68 ret = -EBADF;
69 filp = fget_light(fd, &fput_needed);
70 if (filp) {
71 ret = do_spu_run(filp, unpc, ustatus);
72 fput_light(filp, fput_needed);
73 }
74
75 return ret;
76}
77#endif
78
79asmlinkage long sys_spu_create(const char __user *pathname,
80 unsigned int flags, mode_t mode)
81{
82 char *tmp;
83 int ret;
84
85 tmp = getname(pathname);
86 ret = PTR_ERR(tmp);
87 if (!IS_ERR(tmp)) {
88 struct nameidata nd;
89
90 ret = path_lookup(tmp, LOOKUP_PARENT|
91 LOOKUP_OPEN|LOOKUP_CREATE, &nd);
92 if (!ret) {
93 ret = spufs_create_thread(&nd, pathname, flags, mode);
94 path_release(&nd);
95 }
96 putname(tmp);
97 }
98
99 return ret;
100}
101
102struct spufs_calls spufs_calls = {
103 .create_thread = sys_spu_create,
104 .spu_run = do_spu_run,
105 .owner = THIS_MODULE,
106};
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 14:06:09 -0500