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Merge branch 'spufs' of master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6 into for-2.6.22

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This commit is contained in:
Paul Mackerras 2007-04-24 11:45:03 +10:00
commit 13177c8b7e
16 changed files with 592 additions and 367 deletions
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161
arch/powerpc/platforms/cell/spu_base.c
View File

@ -36,6 +36,8 @@
#include <asm/xmon.h>
const struct spu_management_ops *spu_management_ops;
EXPORT_SYMBOL_GPL(spu_management_ops);
const struct spu_priv1_ops *spu_priv1_ops;
static struct list_head spu_list[MAX_NUMNODES];
@ -290,7 +292,6 @@ spu_irq_class_1(int irq, void *data)
return stat ? IRQ_HANDLED : IRQ_NONE;
}
EXPORT_SYMBOL_GPL(spu_irq_class_1_bottom);
static irqreturn_t
spu_irq_class_2(int irq, void *data)
@ -431,10 +432,11 @@ struct spu *spu_alloc_node(int node)
spu = list_entry(spu_list[node].next, struct spu, list);
list_del_init(&spu->list);
pr_debug("Got SPU %d %d\n", spu->number, spu->node);
spu_init_channels(spu);
}
mutex_unlock(&spu_mutex);
if (spu)
spu_init_channels(spu);
return spu;
}
EXPORT_SYMBOL_GPL(spu_alloc_node);
@ -461,108 +463,6 @@ void spu_free(struct spu *spu)
}
EXPORT_SYMBOL_GPL(spu_free);
static int spu_handle_mm_fault(struct spu *spu)
{
struct mm_struct *mm = spu->mm;
struct vm_area_struct *vma;
u64 ea, dsisr, is_write;
int ret;
ea = spu->dar;
dsisr = spu->dsisr;
#if 0
if (!IS_VALID_EA(ea)) {
return -EFAULT;
}
#endif /* XXX */
if (mm == NULL) {
return -EFAULT;
}
if (mm->pgd == NULL) {
return -EFAULT;
}
down_read(&mm->mmap_sem);
vma = find_vma(mm, ea);
if (!vma)
goto bad_area;
if (vma->vm_start <= ea)
goto good_area;
if (!(vma->vm_flags & VM_GROWSDOWN))
goto bad_area;
#if 0
if (expand_stack(vma, ea))
goto bad_area;
#endif /* XXX */
good_area:
is_write = dsisr & MFC_DSISR_ACCESS_PUT;
if (is_write) {
if (!(vma->vm_flags & VM_WRITE))
goto bad_area;
} else {
if (dsisr & MFC_DSISR_ACCESS_DENIED)
goto bad_area;
if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
goto bad_area;
}
ret = 0;
switch (handle_mm_fault(mm, vma, ea, is_write)) {
case VM_FAULT_MINOR:
current->min_flt++;
break;
case VM_FAULT_MAJOR:
current->maj_flt++;
break;
case VM_FAULT_SIGBUS:
ret = -EFAULT;
goto bad_area;
case VM_FAULT_OOM:
ret = -ENOMEM;
goto bad_area;
default:
BUG();
}
up_read(&mm->mmap_sem);
return ret;
bad_area:
up_read(&mm->mmap_sem);
return -EFAULT;
}
int spu_irq_class_1_bottom(struct spu *spu)
{
u64 ea, dsisr, access, error = 0UL;
int ret = 0;
ea = spu->dar;
dsisr = spu->dsisr;
if (dsisr & (MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED)) {
u64 flags;
access = (_PAGE_PRESENT | _PAGE_USER);
access |= (dsisr & MFC_DSISR_ACCESS_PUT) ? _PAGE_RW : 0UL;
local_irq_save(flags);
if (hash_page(ea, access, 0x300) != 0)
error |= CLASS1_ENABLE_STORAGE_FAULT_INTR;
local_irq_restore(flags);
}
if (error & CLASS1_ENABLE_STORAGE_FAULT_INTR) {
if ((ret = spu_handle_mm_fault(spu)) != 0)
error |= CLASS1_ENABLE_STORAGE_FAULT_INTR;
else
error &= ~CLASS1_ENABLE_STORAGE_FAULT_INTR;
}
spu->dar = 0UL;
spu->dsisr = 0UL;
if (!error) {
spu_restart_dma(spu);
} else {
spu->dma_callback(spu, SPE_EVENT_SPE_DATA_STORAGE);
}
return ret;
}
struct sysdev_class spu_sysdev_class = {
set_kset_name("spu")
};
@ -636,12 +536,6 @@ static int spu_create_sysdev(struct spu *spu)
return 0;
}
static void spu_destroy_sysdev(struct spu *spu)
{
sysfs_remove_device_from_node(&spu->sysdev, spu->node);
sysdev_unregister(&spu->sysdev);
}
static int __init create_spu(void *data)
{
struct spu *spu;
@ -693,58 +587,37 @@ static int __init create_spu(void *data)
return ret;
}
static void destroy_spu(struct spu *spu)
{
list_del_init(&spu->list);
list_del_init(&spu->full_list);
spu_destroy_sysdev(spu);
spu_free_irqs(spu);
spu_destroy_spu(spu);
kfree(spu);
}
static void cleanup_spu_base(void)
{
struct spu *spu, *tmp;
int node;
mutex_lock(&spu_mutex);
for (node = 0; node < MAX_NUMNODES; node++) {
list_for_each_entry_safe(spu, tmp, &spu_list[node], list)
destroy_spu(spu);
}
mutex_unlock(&spu_mutex);
sysdev_class_unregister(&spu_sysdev_class);
}
module_exit(cleanup_spu_base);
static int __init init_spu_base(void)
{
int i, ret;
int i, ret = 0;
for (i = 0; i < MAX_NUMNODES; i++)
INIT_LIST_HEAD(&spu_list[i]);
if (!spu_management_ops)
return 0;
goto out;
/* create sysdev class for spus */
ret = sysdev_class_register(&spu_sysdev_class);
if (ret)
return ret;
for (i = 0; i < MAX_NUMNODES; i++)
INIT_LIST_HEAD(&spu_list[i]);
goto out;
ret = spu_enumerate_spus(create_spu);
if (ret) {
printk(KERN_WARNING "%s: Error initializing spus\n",
__FUNCTION__);
cleanup_spu_base();
return ret;
goto out_unregister_sysdev_class;
}
xmon_register_spus(&spu_full_list);
return 0;
out_unregister_sysdev_class:
sysdev_class_unregister(&spu_sysdev_class);
out:
return ret;
}
module_init(init_spu_base);

34
arch/powerpc/platforms/cell/spu_coredump.c
View File

@ -26,19 +26,18 @@
#include <asm/spu.h>
static struct spu_coredump_calls spu_coredump_calls;
static struct spu_coredump_calls *spu_coredump_calls;
static DEFINE_MUTEX(spu_coredump_mutex);
int arch_notes_size(void)
{
long ret;
struct module *owner = spu_coredump_calls.owner;
ret = -ENOSYS;
mutex_lock(&spu_coredump_mutex);
if (owner && try_module_get(owner)) {
ret = spu_coredump_calls.arch_notes_size();
module_put(owner);
if (spu_coredump_calls && try_module_get(spu_coredump_calls->owner)) {
ret = spu_coredump_calls->arch_notes_size();
module_put(spu_coredump_calls->owner);
}
mutex_unlock(&spu_coredump_mutex);
return ret;
@ -46,36 +45,35 @@ int arch_notes_size(void)
void arch_write_notes(struct file *file)
{
struct module *owner = spu_coredump_calls.owner;
mutex_lock(&spu_coredump_mutex);
if (owner && try_module_get(owner)) {
spu_coredump_calls.arch_write_notes(file);
module_put(owner);
if (spu_coredump_calls && try_module_get(spu_coredump_calls->owner)) {
spu_coredump_calls->arch_write_notes(file);
module_put(spu_coredump_calls->owner);
}
mutex_unlock(&spu_coredump_mutex);
}
int register_arch_coredump_calls(struct spu_coredump_calls *calls)
{
if (spu_coredump_calls.owner)
return -EBUSY;
int ret = 0;
mutex_lock(&spu_coredump_mutex);
spu_coredump_calls.arch_notes_size = calls->arch_notes_size;
spu_coredump_calls.arch_write_notes = calls->arch_write_notes;
spu_coredump_calls.owner = calls->owner;
if (spu_coredump_calls)
ret = -EBUSY;
else
spu_coredump_calls = calls;
mutex_unlock(&spu_coredump_mutex);
return 0;
return ret;
}
EXPORT_SYMBOL_GPL(register_arch_coredump_calls);
void unregister_arch_coredump_calls(struct spu_coredump_calls *calls)
{
BUG_ON(spu_coredump_calls.owner != calls->owner);
BUG_ON(spu_coredump_calls != calls);
mutex_lock(&spu_coredump_mutex);
spu_coredump_calls.owner = NULL;
spu_coredump_calls = NULL;
mutex_unlock(&spu_coredump_mutex);
}
EXPORT_SYMBOL_GPL(unregister_arch_coredump_calls);

2
arch/powerpc/platforms/cell/spufs/Makefile
View File

@ -1,4 +1,4 @@
obj-y += switch.o
obj-y += switch.o fault.o
obj-$(CONFIG_SPU_FS) += spufs.o
spufs-y += inode.o file.o context.o syscalls.o coredump.o

6
arch/powerpc/platforms/cell/spufs/backing_ops.c
View File

@ -350,6 +350,11 @@ static int spu_backing_send_mfc_command(struct spu_context *ctx,
return ret;
}
static void spu_backing_restart_dma(struct spu_context *ctx)
{
/* nothing to do here */
}
struct spu_context_ops spu_backing_ops = {
.mbox_read = spu_backing_mbox_read,
.mbox_stat_read = spu_backing_mbox_stat_read,
@ -376,4 +381,5 @@ struct spu_context_ops spu_backing_ops = {
.read_mfc_tagstatus = spu_backing_read_mfc_tagstatus,
.get_mfc_free_elements = spu_backing_get_mfc_free_elements,
.send_mfc_command = spu_backing_send_mfc_command,
.restart_dma = spu_backing_restart_dma,
};

45
arch/powerpc/platforms/cell/spufs/context.c
View File

@ -41,9 +41,10 @@ struct spu_context *alloc_spu_context(struct spu_gang *gang)
goto out_free;
}
spin_lock_init(&ctx->mmio_lock);
spin_lock_init(&ctx->mapping_lock);
kref_init(&ctx->kref);
mutex_init(&ctx->state_mutex);
init_MUTEX(&ctx->run_sema);
mutex_init(&ctx->run_mutex);
init_waitqueue_head(&ctx->ibox_wq);
init_waitqueue_head(&ctx->wbox_wq);
init_waitqueue_head(&ctx->stop_wq);
@ -51,6 +52,7 @@ struct spu_context *alloc_spu_context(struct spu_gang *gang)
ctx->state = SPU_STATE_SAVED;
ctx->ops = &spu_backing_ops;
ctx->owner = get_task_mm(current);
INIT_LIST_HEAD(&ctx->rq);
if (gang)
spu_gang_add_ctx(gang, ctx);
ctx->rt_priority = current->rt_priority;
@ -75,6 +77,7 @@ void destroy_spu_context(struct kref *kref)
spu_fini_csa(&ctx->csa);
if (ctx->gang)
spu_gang_remove_ctx(ctx->gang, ctx);
BUG_ON(!list_empty(&ctx->rq));
kfree(ctx);
}
@ -118,46 +121,6 @@ void spu_unmap_mappings(struct spu_context *ctx)
unmap_mapping_range(ctx->psmap, 0, 0x20000, 1);
}
/**
* spu_acquire_exclusive - lock spu contex and protect against userspace access
* @ctx: spu contex to lock
*
* Note:
* Returns 0 and with the context locked on success
* Returns negative error and with the context _unlocked_ on failure.
*/
int spu_acquire_exclusive(struct spu_context *ctx)
{
int ret = -EINVAL;
spu_acquire(ctx);
/*
* Context is about to be freed, so we can't acquire it anymore.
*/
if (!ctx->owner)
goto out_unlock;
if (ctx->state == SPU_STATE_SAVED) {
ret = spu_activate(ctx, 0);
if (ret)
goto out_unlock;
} else {
/*
* We need to exclude userspace access to the context.
*
* To protect against memory access we invalidate all ptes
* and make sure the pagefault handlers block on the mutex.
*/
spu_unmap_mappings(ctx);
}
return 0;
out_unlock:
spu_release(ctx);
return ret;
}
/**
* spu_acquire_runnable - lock spu contex and make sure it is in runnable state
* @ctx: spu contex to lock

19
arch/powerpc/platforms/cell/spufs/coredump.c
View File

@ -169,12 +169,12 @@ static void spufs_arch_write_note(struct spufs_ctx_info *ctx_info, int i,
struct spu_context *ctx;
loff_t pos = 0;
int sz, dfd, rc, total = 0;
const int bufsz = 4096;
const int bufsz = PAGE_SIZE;
char *name;
char fullname[80], *buf;
struct elf_note en;
buf = kmalloc(bufsz, GFP_KERNEL);
buf = (void *)get_zeroed_page(GFP_KERNEL);
if (!buf)
return;
@ -187,9 +187,8 @@ static void spufs_arch_write_note(struct spufs_ctx_info *ctx_info, int i,
sz = spufs_coredump_read[i].size;
ctx = ctx_info->ctx;
if (!ctx) {
return;
}
if (!ctx)
goto out;
sprintf(fullname, "SPU/%d/%s", dfd, name);
en.n_namesz = strlen(fullname) + 1;
@ -197,23 +196,25 @@ static void spufs_arch_write_note(struct spufs_ctx_info *ctx_info, int i,
en.n_type = NT_SPU;
if (!spufs_dump_write(file, &en, sizeof(en)))
return;
goto out;
if (!spufs_dump_write(file, fullname, en.n_namesz))
return;
goto out;
if (!spufs_dump_seek(file, roundup((unsigned long)file->f_pos, 4)))
return;
goto out;
do {
rc = do_coredump_read(i, ctx, buf, bufsz, &pos);
if (rc > 0) {
if (!spufs_dump_write(file, buf, rc))
return;
goto out;
total += rc;
}
} while (rc == bufsz && total < sz);
spufs_dump_seek(file, roundup((unsigned long)file->f_pos
- total + sz, 4));
out:
free_page((unsigned long)buf);
}
static void spufs_arch_write_notes(struct file *file)

211
arch/powerpc/platforms/cell/spufs/fault.c Normal file
View File

@ -0,0 +1,211 @@
/*
* Low-level SPU handling
*
* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
*
* Author: Arnd Bergmann <arndb@de.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <asm/spu.h>
#include <asm/spu_csa.h>
#include "spufs.h"
/*
* This ought to be kept in sync with the powerpc specific do_page_fault
* function. Currently, there are a few corner cases that we haven't had
* to handle fortunately.
*/
static int spu_handle_mm_fault(struct mm_struct *mm, unsigned long ea, unsigned long dsisr)
{
struct vm_area_struct *vma;
unsigned long is_write;
int ret;
#if 0
if (!IS_VALID_EA(ea)) {
return -EFAULT;
}
#endif /* XXX */
if (mm == NULL) {
return -EFAULT;
}
if (mm->pgd == NULL) {
return -EFAULT;
}
down_read(&mm->mmap_sem);
vma = find_vma(mm, ea);
if (!vma)
goto bad_area;
if (vma->vm_start <= ea)
goto good_area;
if (!(vma->vm_flags & VM_GROWSDOWN))
goto bad_area;
if (expand_stack(vma, ea))
goto bad_area;
good_area:
is_write = dsisr & MFC_DSISR_ACCESS_PUT;
if (is_write) {
if (!(vma->vm_flags & VM_WRITE))
goto bad_area;
} else {
if (dsisr & MFC_DSISR_ACCESS_DENIED)
goto bad_area;
if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
goto bad_area;
}
ret = 0;
switch (handle_mm_fault(mm, vma, ea, is_write)) {
case VM_FAULT_MINOR:
current->min_flt++;
break;
case VM_FAULT_MAJOR:
current->maj_flt++;
break;
case VM_FAULT_SIGBUS:
ret = -EFAULT;
goto bad_area;
case VM_FAULT_OOM:
ret = -ENOMEM;
goto bad_area;
default:
BUG();
}
up_read(&mm->mmap_sem);
return ret;
bad_area:
up_read(&mm->mmap_sem);
return -EFAULT;
}
static void spufs_handle_dma_error(struct spu_context *ctx,
unsigned long ea, int type)
{
if (ctx->flags & SPU_CREATE_EVENTS_ENABLED) {
ctx->event_return |= type;
wake_up_all(&ctx->stop_wq);
} else {
siginfo_t info;
memset(&info, 0, sizeof(info));
switch (type) {
case SPE_EVENT_INVALID_DMA:
info.si_signo = SIGBUS;
info.si_code = BUS_OBJERR;
break;
case SPE_EVENT_SPE_DATA_STORAGE:
info.si_signo = SIGBUS;
info.si_addr = (void __user *)ea;
info.si_code = BUS_ADRERR;
break;
case SPE_EVENT_DMA_ALIGNMENT:
info.si_signo = SIGBUS;
/* DAR isn't set for an alignment fault :( */
info.si_code = BUS_ADRALN;
break;
case SPE_EVENT_SPE_ERROR:
info.si_signo = SIGILL;
info.si_addr = (void __user *)(unsigned long)
ctx->ops->npc_read(ctx) - 4;
info.si_code = ILL_ILLOPC;
break;
}
if (info.si_signo)
force_sig_info(info.si_signo, &info, current);
}
}
void spufs_dma_callback(struct spu *spu, int type)
{
spufs_handle_dma_error(spu->ctx, spu->dar, type);
}
EXPORT_SYMBOL_GPL(spufs_dma_callback);
/*
* bottom half handler for page faults, we can't do this from
* interrupt context, since we might need to sleep.
* we also need to give up the mutex so we can get scheduled
* out while waiting for the backing store.
*
* TODO: try calling hash_page from the interrupt handler first
* in order to speed up the easy case.
*/
int spufs_handle_class1(struct spu_context *ctx)
{
u64 ea, dsisr, access;
unsigned long flags;
int ret;
/*
* dar and dsisr get passed from the registers
* to the spu_context, to this function, but not
* back to the spu if it gets scheduled again.
*
* if we don't handle the fault for a saved context
* in time, we can still expect to get the same fault
* the immediately after the context restore.
*/
if (ctx->state == SPU_STATE_RUNNABLE) {
ea = ctx->spu->dar;
dsisr = ctx->spu->dsisr;
ctx->spu->dar= ctx->spu->dsisr = 0;
} else {
ea = ctx->csa.priv1.mfc_dar_RW;
dsisr = ctx->csa.priv1.mfc_dsisr_RW;
ctx->csa.priv1.mfc_dar_RW = 0;
ctx->csa.priv1.mfc_dsisr_RW = 0;
}
if (!(dsisr & (MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED)))
return 0;
pr_debug("ctx %p: ea %016lx, dsisr %016lx state %d\n", ctx, ea,
dsisr, ctx->state);
/* we must not hold the lock when entering spu_handle_mm_fault */
spu_release(ctx);
access = (_PAGE_PRESENT | _PAGE_USER);
access |= (dsisr & MFC_DSISR_ACCESS_PUT) ? _PAGE_RW : 0UL;
local_irq_save(flags);
ret = hash_page(ea, access, 0x300);
local_irq_restore(flags);
/* hashing failed, so try the actual fault handler */
if (ret)
ret = spu_handle_mm_fault(current->mm, ea, dsisr);
spu_acquire(ctx);
/*
* If we handled the fault successfully and are in runnable
* state, restart the DMA.
* In case of unhandled error report the problem to user space.
*/
if (!ret) {
if (ctx->spu)
ctx->ops->restart_dma(ctx);
} else
spufs_handle_dma_error(ctx, ea, SPE_EVENT_SPE_DATA_STORAGE);
return ret;
}
EXPORT_SYMBOL_GPL(spufs_handle_class1);

152
arch/powerpc/platforms/cell/spufs/file.c
View File

@ -44,9 +44,25 @@ spufs_mem_open(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
file->private_data = ctx;
ctx->local_store = inode->i_mapping;
smp_wmb();
if (!i->i_openers++)
ctx->local_store = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
return 0;
}
static int
spufs_mem_release(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->local_store = NULL;
spin_unlock(&ctx->mapping_lock);
return 0;
}
@ -149,6 +165,7 @@ spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
static const struct file_operations spufs_mem_fops = {
.open = spufs_mem_open,
.release = spufs_mem_release,
.read = spufs_mem_read,
.write = spufs_mem_write,
.llseek = generic_file_llseek,
@ -238,16 +255,33 @@ static int spufs_cntl_open(struct inode *inode, struct file *file)
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
file->private_data = ctx;
ctx->cntl = inode->i_mapping;
smp_wmb();
if (!i->i_openers++)
ctx->cntl = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
return simple_attr_open(inode, file, spufs_cntl_get,
spufs_cntl_set, "0x%08lx");
}
static int
spufs_cntl_release(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
simple_attr_close(inode, file);
spin_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->cntl = NULL;
spin_unlock(&ctx->mapping_lock);
return 0;
}
static const struct file_operations spufs_cntl_fops = {
.open = spufs_cntl_open,
.release = simple_attr_close,
.release = spufs_cntl_release,
.read = simple_attr_read,
.write = simple_attr_write,
.mmap = spufs_cntl_mmap,
@ -723,12 +757,28 @@ static int spufs_signal1_open(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
file->private_data = ctx;
ctx->signal1 = inode->i_mapping;
smp_wmb();
if (!i->i_openers++)
ctx->signal1 = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
static int
spufs_signal1_release(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->signal1 = NULL;
spin_unlock(&ctx->mapping_lock);
return 0;
}
static ssize_t __spufs_signal1_read(struct spu_context *ctx, char __user *buf,
size_t len, loff_t *pos)
{
@ -821,6 +871,7 @@ static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma)
static const struct file_operations spufs_signal1_fops = {
.open = spufs_signal1_open,
.release = spufs_signal1_release,
.read = spufs_signal1_read,
.write = spufs_signal1_write,
.mmap = spufs_signal1_mmap,
@ -830,12 +881,28 @@ static int spufs_signal2_open(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
file->private_data = ctx;
ctx->signal2 = inode->i_mapping;
smp_wmb();
if (!i->i_openers++)
ctx->signal2 = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
static int
spufs_signal2_release(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->signal2 = NULL;
spin_unlock(&ctx->mapping_lock);
return 0;
}
static ssize_t __spufs_signal2_read(struct spu_context *ctx, char __user *buf,
size_t len, loff_t *pos)
{
@ -932,6 +999,7 @@ static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
static const struct file_operations spufs_signal2_fops = {
.open = spufs_signal2_open,
.release = spufs_signal2_release,
.read = spufs_signal2_read,
.write = spufs_signal2_write,
.mmap = spufs_signal2_mmap,
@ -1031,13 +1099,30 @@ static int spufs_mss_open(struct inode *inode, struct file *file)
struct spu_context *ctx = i->i_ctx;
file->private_data = i->i_ctx;
ctx->mss = inode->i_mapping;
smp_wmb();
spin_lock(&ctx->mapping_lock);
if (!i->i_openers++)
ctx->mss = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
static int
spufs_mss_release(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->mss = NULL;
spin_unlock(&ctx->mapping_lock);
return 0;
}
static const struct file_operations spufs_mss_fops = {
.open = spufs_mss_open,
.release = spufs_mss_release,
.mmap = spufs_mss_mmap,
};
@ -1072,14 +1157,30 @@ static int spufs_psmap_open(struct inode *inode, struct file *file)
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
file->private_data = i->i_ctx;
ctx->psmap = inode->i_mapping;
smp_wmb();
if (!i->i_openers++)
ctx->psmap = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
static int
spufs_psmap_release(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->psmap = NULL;
spin_unlock(&ctx->mapping_lock);
return 0;
}
static const struct file_operations spufs_psmap_fops = {
.open = spufs_psmap_open,
.release = spufs_psmap_release,
.mmap = spufs_psmap_mmap,
};
@ -1126,12 +1227,27 @@ static int spufs_mfc_open(struct inode *inode, struct file *file)
if (atomic_read(&inode->i_count) != 1)
return -EBUSY;
spin_lock(&ctx->mapping_lock);
file->private_data = ctx;
ctx->mfc = inode->i_mapping;
smp_wmb();
if (!i->i_openers++)
ctx->mfc = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
static int
spufs_mfc_release(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
struct spu_context *ctx = i->i_ctx;
spin_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->mfc = NULL;
spin_unlock(&ctx->mapping_lock);
return 0;
}
/* interrupt-level mfc callback function. */
void spufs_mfc_callback(struct spu *spu)
{
@ -1313,7 +1429,10 @@ static ssize_t spufs_mfc_write(struct file *file, const char __user *buffer,
if (ret)
goto out;
spu_acquire_runnable(ctx, 0);
ret = spu_acquire_runnable(ctx, 0);
if (ret)
goto out;
if (file->f_flags & O_NONBLOCK) {
ret = ctx->ops->send_mfc_command(ctx, &cmd);
} else {
@ -1399,6 +1518,7 @@ static int spufs_mfc_fasync(int fd, struct file *file, int on)
static const struct file_operations spufs_mfc_fops = {
.open = spufs_mfc_open,
.release = spufs_mfc_release,
.read = spufs_mfc_read,
.write = spufs_mfc_write,
.poll = spufs_mfc_poll,

9
arch/powerpc/platforms/cell/spufs/hw_ops.c
View File

@ -296,6 +296,14 @@ static int spu_hw_send_mfc_command(struct spu_context *ctx,
}
}
static void spu_hw_restart_dma(struct spu_context *ctx)
{
struct spu_priv2 __iomem *priv2 = ctx->spu->priv2;
if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &ctx->spu->flags))
out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
}
struct spu_context_ops spu_hw_ops = {
.mbox_read = spu_hw_mbox_read,
.mbox_stat_read = spu_hw_mbox_stat_read,
@ -320,4 +328,5 @@ struct spu_context_ops spu_hw_ops = {
.read_mfc_tagstatus = spu_hw_read_mfc_tagstatus,
.get_mfc_free_elements = spu_hw_get_mfc_free_elements,
.send_mfc_command = spu_hw_send_mfc_command,
.restart_dma = spu_hw_restart_dma,
};

42
arch/powerpc/platforms/cell/spufs/inode.c
View File

@ -36,6 +36,7 @@
#include <asm/prom.h>
#include <asm/semaphore.h>
#include <asm/spu.h>
#include <asm/spu_priv1.h>
#include <asm/uaccess.h>
#include "spufs.h"
@ -54,6 +55,7 @@ spufs_alloc_inode(struct super_block *sb)
ei->i_gang = NULL;
ei->i_ctx = NULL;
ei->i_openers = 0;
return &ei->vfs_inode;
}
@ -520,13 +522,14 @@ long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode)
/* File system initialization */
enum {
Opt_uid, Opt_gid, Opt_err,
Opt_uid, Opt_gid, Opt_mode, Opt_err,
};
static match_table_t spufs_tokens = {
{ Opt_uid, "uid=%d" },
{ Opt_gid, "gid=%d" },
{ Opt_err, NULL },
{ Opt_uid, "uid=%d" },
{ Opt_gid, "gid=%d" },
{ Opt_mode, "mode=%o" },
{ Opt_err, NULL },
};
static int
@ -553,6 +556,11 @@ spufs_parse_options(char *options, struct inode *root)
return 0;
root->i_gid = option;
break;
case Opt_mode:
if (match_octal(&args[0], &option))
return 0;
root->i_mode = option | S_IFDIR;
break;
default:
return 0;
}
@ -560,6 +568,11 @@ spufs_parse_options(char *options, struct inode *root)
return 1;
}
static void spufs_exit_isolated_loader(void)
{
kfree(isolated_loader);
}
static void
spufs_init_isolated_loader(void)
{
@ -653,6 +666,10 @@ static int __init spufs_init(void)
{
int ret;
ret = -ENODEV;
if (!spu_management_ops)
goto out;
ret = -ENOMEM;
spufs_inode_cache = kmem_cache_create("spufs_inode_cache",
sizeof(struct spufs_inode_info), 0,
@ -660,25 +677,29 @@ static int __init spufs_init(void)
if (!spufs_inode_cache)
goto out;
if (spu_sched_init() != 0) {
kmem_cache_destroy(spufs_inode_cache);
goto out;
}
ret = register_filesystem(&spufs_type);
ret = spu_sched_init();
if (ret)
goto out_cache;
ret = register_filesystem(&spufs_type);
if (ret)
goto out_sched;
ret = register_spu_syscalls(&spufs_calls);
if (ret)
goto out_fs;
ret = register_arch_coredump_calls(&spufs_coredump_calls);
if (ret)
goto out_fs;
goto out_syscalls;
spufs_init_isolated_loader();
return 0;
out_syscalls:
unregister_spu_syscalls(&spufs_calls);
out_fs:
unregister_filesystem(&spufs_type);
out_sched:
spu_sched_exit();
out_cache:
kmem_cache_destroy(spufs_inode_cache);
out:
@ -689,6 +710,7 @@ module_init(spufs_init);
static void __exit spufs_exit(void)
{
spu_sched_exit();
spufs_exit_isolated_loader();
unregister_arch_coredump_calls(&spufs_coredump_calls);
unregister_spu_syscalls(&spufs_calls);
unregister_filesystem(&spufs_type);

123
arch/powerpc/platforms/cell/spufs/run.c
View File

@ -18,27 +18,6 @@ void spufs_stop_callback(struct spu *spu)
wake_up_all(&ctx->stop_wq);
}
void spufs_dma_callback(struct spu *spu, int type)
{
struct spu_context *ctx = spu->ctx;
if (ctx->flags & SPU_CREATE_EVENTS_ENABLED) {
ctx->event_return |= type;
wake_up_all(&ctx->stop_wq);
} else {
switch (type) {
case SPE_EVENT_DMA_ALIGNMENT:
case SPE_EVENT_SPE_DATA_STORAGE:
case SPE_EVENT_INVALID_DMA:
force_sig(SIGBUS, /* info, */ current);
break;
case SPE_EVENT_SPE_ERROR:
force_sig(SIGILL, /* info */ current);
break;
}
}
}
static inline int spu_stopped(struct spu_context *ctx, u32 * stat)
{
struct spu *spu;
@ -63,13 +42,18 @@ static int spu_setup_isolated(struct spu_context *ctx)
const u32 status_loading = SPU_STATUS_RUNNING
| SPU_STATUS_ISOLATED_STATE | SPU_STATUS_ISOLATED_LOAD_STATUS;
ret = -ENODEV;
if (!isolated_loader)
return -ENODEV;
ret = spu_acquire_exclusive(ctx);
if (ret)
goto out;
/*
* We need to exclude userspace access to the context.
*
* To protect against memory access we invalidate all ptes
* and make sure the pagefault handlers block on the mutex.
*/
spu_unmap_mappings(ctx);
mfc_cntl = &ctx->spu->priv2->mfc_control_RW;
/* purge the MFC DMA queue to ensure no spurious accesses before we
@ -82,7 +66,7 @@ static int spu_setup_isolated(struct spu_context *ctx)
printk(KERN_ERR "%s: timeout flushing MFC DMA queue\n",
__FUNCTION__);
ret = -EIO;
goto out_unlock;
goto out;
}
cond_resched();
}
@ -119,12 +103,15 @@ static int spu_setup_isolated(struct spu_context *ctx)
pr_debug("%s: isolated LOAD failed\n", __FUNCTION__);
ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE);
ret = -EACCES;
goto out_drop_priv;
}
} else if (!(status & SPU_STATUS_ISOLATED_STATE)) {
if (!(status & SPU_STATUS_ISOLATED_STATE)) {
/* This isn't allowed by the CBEA, but check anyway */
pr_debug("%s: SPU fell out of isolated mode?\n", __FUNCTION__);
ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_STOP);
ret = -EINVAL;
goto out_drop_priv;
}
out_drop_priv:
@ -132,30 +119,19 @@ static int spu_setup_isolated(struct spu_context *ctx)
sr1 |= MFC_STATE1_PROBLEM_STATE_MASK;
spu_mfc_sr1_set(ctx->spu, sr1);
out_unlock:
spu_release(ctx);
out:
return ret;
}
static inline int spu_run_init(struct spu_context *ctx, u32 * npc)
static int spu_run_init(struct spu_context *ctx, u32 * npc)
{
int ret;
unsigned long runcntl = SPU_RUNCNTL_RUNNABLE;
ret = spu_acquire_runnable(ctx, 0);
if (ret)
return ret;
if (ctx->flags & SPU_CREATE_ISOLATE) {
unsigned long runcntl;
if (!(ctx->ops->status_read(ctx) & SPU_STATUS_ISOLATED_STATE)) {
/* Need to release ctx, because spu_setup_isolated will
* acquire it exclusively.
*/
spu_release(ctx);
ret = spu_setup_isolated(ctx);
if (!ret)
ret = spu_acquire_runnable(ctx, 0);
int ret = spu_setup_isolated(ctx);
if (ret)
return ret;
}
/* if userspace has set the runcntrl register (eg, to issue an
@ -164,16 +140,17 @@ static inline int spu_run_init(struct spu_context *ctx, u32 * npc)
(SPU_RUNCNTL_RUNNABLE | SPU_RUNCNTL_ISOLATE);
if (runcntl == 0)
runcntl = SPU_RUNCNTL_RUNNABLE;
ctx->ops->runcntl_write(ctx, runcntl);
} else {
spu_start_tick(ctx);
ctx->ops->npc_write(ctx, *npc);
ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE);
}
ctx->ops->runcntl_write(ctx, runcntl);
return ret;
return 0;
}
static inline int spu_run_fini(struct spu_context *ctx, u32 * npc,
static int spu_run_fini(struct spu_context *ctx, u32 * npc,
u32 * status)
{
int ret = 0;
@ -189,19 +166,27 @@ static inline int spu_run_fini(struct spu_context *ctx, u32 * npc,
return ret;
}
static inline int spu_reacquire_runnable(struct spu_context *ctx, u32 *npc,
static int spu_reacquire_runnable(struct spu_context *ctx, u32 *npc,
u32 *status)
{
int ret;
if ((ret = spu_run_fini(ctx, npc, status)) != 0)
ret = spu_run_fini(ctx, npc, status);
if (ret)
return ret;
if (*status & (SPU_STATUS_STOPPED_BY_STOP |
SPU_STATUS_STOPPED_BY_HALT)) {
if (*status & (SPU_STATUS_STOPPED_BY_STOP | SPU_STATUS_STOPPED_BY_HALT))
return *status;
}
if ((ret = spu_run_init(ctx, npc)) != 0)
ret = spu_acquire_runnable(ctx, 0);
if (ret)
return ret;
ret = spu_run_init(ctx, npc);
if (ret) {
spu_release(ctx);
return ret;
}
return 0;
}
@ -253,17 +238,17 @@ int spu_process_callback(struct spu_context *ctx)
{
struct spu_syscall_block s;
u32 ls_pointer, npc;
char *ls;
void __iomem *ls;
long spu_ret;
int ret;
/* get syscall block from local store */
npc = ctx->ops->npc_read(ctx);
ls = ctx->ops->get_ls(ctx);
ls_pointer = *(u32*)(ls + npc);
npc = ctx->ops->npc_read(ctx) & ~3;
ls = (void __iomem *)ctx->ops->get_ls(ctx);
ls_pointer = in_be32(ls + npc);
if (ls_pointer > (LS_SIZE - sizeof(s)))
return -EFAULT;
memcpy(&s, ls + ls_pointer, sizeof (s));
memcpy_fromio(&s, ls + ls_pointer, sizeof(s));
/* do actual syscall without pinning the spu */
ret = 0;
@ -283,7 +268,7 @@ int spu_process_callback(struct spu_context *ctx)
}
/* write result, jump over indirect pointer */
memcpy(ls + ls_pointer, &spu_ret, sizeof (spu_ret));
memcpy_toio(ls + ls_pointer, &spu_ret, sizeof(spu_ret));
ctx->ops->npc_write(ctx, npc);
ctx->ops->runcntl_write(ctx, SPU_RUNCNTL_RUNNABLE);
return ret;
@ -292,11 +277,8 @@ int spu_process_callback(struct spu_context *ctx)
static inline int spu_process_events(struct spu_context *ctx)
{
struct spu *spu = ctx->spu;
u64 pte_fault = MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED;
int ret = 0;
if (spu->dsisr & pte_fault)
ret = spu_irq_class_1_bottom(spu);
if (spu->class_0_pending)
ret = spu_irq_class_0_bottom(spu);
if (!ret && signal_pending(current))
@ -310,14 +292,21 @@ long spufs_run_spu(struct file *file, struct spu_context *ctx,
int ret;
u32 status;
if (down_interruptible(&ctx->run_sema))
if (mutex_lock_interruptible(&ctx->run_mutex))
return -ERESTARTSYS;
ctx->ops->master_start(ctx);
ctx->event_return = 0;
ret = spu_run_init(ctx, npc);
ret = spu_acquire_runnable(ctx, 0);
if (ret)
return ret;
ret = spu_run_init(ctx, npc);
if (ret) {
spu_release(ctx);
goto out;
}
do {
ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, &status));
@ -330,6 +319,10 @@ long spufs_run_spu(struct file *file, struct spu_context *ctx,
break;
status &= ~SPU_STATUS_STOPPED_BY_STOP;
}
ret = spufs_handle_class1(ctx);
if (ret)
break;
if (unlikely(ctx->state != SPU_STATE_RUNNABLE)) {
ret = spu_reacquire_runnable(ctx, npc, &status);
if (ret) {
@ -363,6 +356,6 @@ long spufs_run_spu(struct file *file, struct spu_context *ctx,
out:
*event = ctx->event_return;
up(&ctx->run_sema);
mutex_unlock(&ctx->run_mutex);
return ret;
}

111
arch/powerpc/platforms/cell/spufs/sched.c
View File

@ -71,14 +71,27 @@ static inline int node_allowed(int node)
void spu_start_tick(struct spu_context *ctx)
{
if (ctx->policy == SCHED_RR)
if (ctx->policy == SCHED_RR) {
/*
* Make sure the exiting bit is cleared.
*/
clear_bit(SPU_SCHED_EXITING, &ctx->sched_flags);
mb();
queue_delayed_work(spu_sched_wq, &ctx->sched_work, SPU_TIMESLICE);
}
}
void spu_stop_tick(struct spu_context *ctx)
{
if (ctx->policy == SCHED_RR)
if (ctx->policy == SCHED_RR) {
/*
* While the work can be rearming normally setting this flag
* makes sure it does not rearm itself anymore.
*/
set_bit(SPU_SCHED_EXITING, &ctx->sched_flags);
mb();
cancel_delayed_work(&ctx->sched_work);
}
}
void spu_sched_tick(struct work_struct *work)
@ -86,7 +99,15 @@ void spu_sched_tick(struct work_struct *work)
struct spu_context *ctx =
container_of(work, struct spu_context, sched_work.work);
struct spu *spu;
int rearm = 1;
int preempted = 0;
/*
* If this context is being stopped avoid rescheduling from the
* scheduler tick because we would block on the state_mutex.
* The caller will yield the spu later on anyway.
*/
if (test_bit(SPU_SCHED_EXITING, &ctx->sched_flags))
return;
mutex_lock(&ctx->state_mutex);
spu = ctx->spu;
@ -94,12 +115,19 @@ void spu_sched_tick(struct work_struct *work)
int best = sched_find_first_bit(spu_prio->bitmap);
if (best <= ctx->prio) {
spu_deactivate(ctx);
rearm = 0;
preempted = 1;
}
}
mutex_unlock(&ctx->state_mutex);
if (rearm)
if (preempted) {
/*
* We need to break out of the wait loop in spu_run manually
* to ensure this context gets put on the runqueue again
* ASAP.
*/
wake_up(&ctx->stop_wq);
} else
spu_start_tick(ctx);
}
@ -208,58 +236,40 @@ static void spu_unbind_context(struct spu *spu, struct spu_context *ctx)
* spu_add_to_rq - add a context to the runqueue
* @ctx: context to add
*/
static void spu_add_to_rq(struct spu_context *ctx)
static void __spu_add_to_rq(struct spu_context *ctx)
{
spin_lock(&spu_prio->runq_lock);
list_add_tail(&ctx->rq, &spu_prio->runq[ctx->prio]);
set_bit(ctx->prio, spu_prio->bitmap);
spin_unlock(&spu_prio->runq_lock);
int prio = ctx->prio;
list_add_tail(&ctx->rq, &spu_prio->runq[prio]);
set_bit(prio, spu_prio->bitmap);
}
/**
* spu_del_from_rq - remove a context from the runqueue
* @ctx: context to remove
*/
static void spu_del_from_rq(struct spu_context *ctx)
static void __spu_del_from_rq(struct spu_context *ctx)
{
spin_lock(&spu_prio->runq_lock);
list_del_init(&ctx->rq);
if (list_empty(&spu_prio->runq[ctx->prio]))
clear_bit(ctx->prio, spu_prio->bitmap);
spin_unlock(&spu_prio->runq_lock);
}
int prio = ctx->prio;
/**
* spu_grab_context - remove one context from the runqueue
* @prio: priority of the context to be removed
*
* This function removes one context from the runqueue for priority @prio.
* If there is more than one context with the given priority the first
* task on the runqueue will be taken.
*
* Returns the spu_context it just removed.
*
* Must be called with spu_prio->runq_lock held.
*/
static struct spu_context *spu_grab_context(int prio)
{
struct list_head *rq = &spu_prio->runq[prio];
if (list_empty(rq))
return NULL;
return list_entry(rq->next, struct spu_context, rq);
if (!list_empty(&ctx->rq))
list_del_init(&ctx->rq);
if (list_empty(&spu_prio->runq[prio]))
clear_bit(prio, spu_prio->bitmap);
}
static void spu_prio_wait(struct spu_context *ctx)
{
DEFINE_WAIT(wait);
spin_lock(&spu_prio->runq_lock);
prepare_to_wait_exclusive(&ctx->stop_wq, &wait, TASK_INTERRUPTIBLE);
if (!signal_pending(current)) {
__spu_add_to_rq(ctx);
spin_unlock(&spu_prio->runq_lock);
mutex_unlock(&ctx->state_mutex);
schedule();
mutex_lock(&ctx->state_mutex);
spin_lock(&spu_prio->runq_lock);
__spu_del_from_rq(ctx);
}
spin_unlock(&spu_prio->runq_lock);
__set_current_state(TASK_RUNNING);
remove_wait_queue(&ctx->stop_wq, &wait);
}
@ -280,9 +290,14 @@ static void spu_reschedule(struct spu *spu)
spin_lock(&spu_prio->runq_lock);
best = sched_find_first_bit(spu_prio->bitmap);
if (best < MAX_PRIO) {
struct spu_context *ctx = spu_grab_context(best);
if (ctx)
wake_up(&ctx->stop_wq);
struct list_head *rq = &spu_prio->runq[best];
struct spu_context *ctx;
BUG_ON(list_empty(rq));
ctx = list_entry(rq->next, struct spu_context, rq);
__spu_del_from_rq(ctx);
wake_up(&ctx->stop_wq);
}
spin_unlock(&spu_prio->runq_lock);
}
@ -365,6 +380,12 @@ static struct spu *find_victim(struct spu_context *ctx)
}
spu_unbind_context(spu, victim);
mutex_unlock(&victim->state_mutex);
/*
* We need to break out of the wait loop in spu_run
* manually to ensure this context gets put on the
* runqueue again ASAP.
*/
wake_up(&victim->stop_wq);
return spu;
}
}
@ -377,7 +398,7 @@ static struct spu *find_victim(struct spu_context *ctx)
* @ctx: spu context to schedule
* @flags: flags (currently ignored)
*
* Tries to find a free spu to run @ctx. If no free spu is availble
* Tries to find a free spu to run @ctx. If no free spu is available
* add the context to the runqueue so it gets woken up once an spu
* is available.
*/
@ -402,9 +423,7 @@ int spu_activate(struct spu_context *ctx, unsigned long flags)
return 0;
}
spu_add_to_rq(ctx);
spu_prio_wait(ctx);
spu_del_from_rq(ctx);
} while (!signal_pending(current));
return -ERESTARTSYS;

34
arch/powerpc/platforms/cell/spufs/spufs.h
View File

@ -41,7 +41,7 @@ struct spu_gang;
/* ctx->sched_flags */
enum {
SPU_SCHED_WAKE = 0, /* currently unused */
SPU_SCHED_EXITING = 0,
};
struct spu_context {
@ -50,16 +50,17 @@ struct spu_context {
spinlock_t mmio_lock; /* protects mmio access */
struct address_space *local_store; /* local store mapping. */
struct address_space *mfc; /* 'mfc' area mappings. */
struct address_space *cntl; /* 'control' area mappings. */
struct address_space *signal1; /* 'signal1' area mappings. */
struct address_space *signal2; /* 'signal2' area mappings. */
struct address_space *mss; /* 'mss' area mappings. */
struct address_space *psmap; /* 'psmap' area mappings. */
struct address_space *cntl; /* 'control' area mappings. */
struct address_space *signal1; /* 'signal1' area mappings. */
struct address_space *signal2; /* 'signal2' area mappings. */
struct address_space *mss; /* 'mss' area mappings. */
struct address_space *psmap; /* 'psmap' area mappings. */
spinlock_t mapping_lock;
u64 object_id; /* user space pointer for oprofile */
enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
struct mutex state_mutex;
struct semaphore run_sema;
struct mutex run_mutex;
struct mm_struct *owner;
@ -140,6 +141,7 @@ struct spu_context_ops {
struct spu_dma_info * info);
void (*proxydma_info_read) (struct spu_context * ctx,
struct spu_proxydma_info * info);
void (*restart_dma)(struct spu_context *ctx);
};
extern struct spu_context_ops spu_hw_ops;
@ -149,6 +151,7 @@ struct spufs_inode_info {
struct spu_context *i_ctx;
struct spu_gang *i_gang;
struct inode vfs_inode;
int i_openers;
};
#define SPUFS_I(inode) \
container_of(inode, struct spufs_inode_info, vfs_inode)
@ -170,6 +173,9 @@ int put_spu_gang(struct spu_gang *gang);
void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx);
void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx);
/* fault handling */
int spufs_handle_class1(struct spu_context *ctx);
/* context management */
static inline void spu_acquire(struct spu_context *ctx)
{
@ -190,7 +196,6 @@ void spu_unmap_mappings(struct spu_context *ctx);
void spu_forget(struct spu_context *ctx);
int spu_acquire_runnable(struct spu_context *ctx, unsigned long flags);
void spu_acquire_saved(struct spu_context *ctx);
int spu_acquire_exclusive(struct spu_context *ctx);
int spu_activate(struct spu_context *ctx, unsigned long flags);
void spu_deactivate(struct spu_context *ctx);
@ -218,14 +223,13 @@ extern char *isolated_loader;
prepare_to_wait(&(wq), &__wait, TASK_INTERRUPTIBLE); \
if (condition) \
break; \
if (!signal_pending(current)) { \
spu_release(ctx); \
schedule(); \
spu_acquire(ctx); \
continue; \
if (signal_pending(current)) { \
__ret = -ERESTARTSYS; \
break; \
} \
__ret = -ERESTARTSYS; \
break; \
spu_release(ctx); \
schedule(); \
spu_acquire(ctx); \
} \
finish_wait(&(wq), &__wait); \
__ret; \

8
arch/powerpc/platforms/cell/spufs/switch.c
View File

@ -2084,6 +2084,10 @@ int spu_save(struct spu_state *prev, struct spu *spu)
int rc;
acquire_spu_lock(spu); /* Step 1. */
prev->dar = spu->dar;
prev->dsisr = spu->dsisr;
spu->dar = 0;
spu->dsisr = 0;
rc = __do_spu_save(prev, spu); /* Steps 2-53. */
release_spu_lock(spu);
if (rc != 0 && rc != 2 && rc != 6) {
@ -2109,9 +2113,9 @@ int spu_restore(struct spu_state *new, struct spu *spu)
acquire_spu_lock(spu);
harvest(NULL, spu);
spu->dar = 0;
spu->dsisr = 0;
spu->slb_replace = 0;
new->dar = 0;
new->dsisr = 0;
spu->class_0_pending = 0;
rc = __do_spu_restore(new, spu);
release_spu_lock(spu);

1
include/asm-powerpc/mmu.h
View File

@ -234,6 +234,7 @@ extern int __hash_page_64K(unsigned long ea, unsigned long access,
unsigned long vsid, pte_t *ptep, unsigned long trap,
unsigned int local);
struct mm_struct;
extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap);
extern int hash_huge_page(struct mm_struct *mm, unsigned long access,
unsigned long ea, unsigned long vsid, int local,
unsigned long trap);

1
include/asm-powerpc/spu_csa.h
View File

@ -242,6 +242,7 @@ struct spu_state {
u64 spu_chnldata_RW[32];
u32 spu_mailbox_data[4];
u32 pu_mailbox_data[1];
u64 dar, dsisr;
unsigned long suspend_time;
spinlock_t register_lock;
};