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[POWERPC] spufs: Synchronize pte invalidation vs ps close

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Make sure the mapping_lock also protects access to the various address_space
pointers used for tearing down the ptes on a spu context switch.

Because unmap_mapping_range can sleep we need to turn mapping_lock from
a spinlock into a sleeping mutex.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Christoph Hellwig 2007-06-04 23:26:51 +10:00 committed by Paul Mackerras
parent 89df00855b
commit 47d3a5faa3
3 changed files with 32 additions and 30 deletions
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4
arch/powerpc/platforms/cell/spufs/context.c
View File

@ -39,7 +39,7 @@ struct spu_context *alloc_spu_context(struct spu_gang *gang)
if (spu_init_csa(&ctx->csa))
goto out_free;
spin_lock_init(&ctx->mmio_lock);
spin_lock_init(&ctx->mapping_lock);
mutex_init(&ctx->mapping_lock);
kref_init(&ctx->kref);
mutex_init(&ctx->state_mutex);
mutex_init(&ctx->run_mutex);
@ -103,6 +103,7 @@ void spu_forget(struct spu_context *ctx)
void spu_unmap_mappings(struct spu_context *ctx)
{
mutex_lock(&ctx->mapping_lock);
if (ctx->local_store)
unmap_mapping_range(ctx->local_store, 0, LS_SIZE, 1);
if (ctx->mfc)
@ -117,6 +118,7 @@ void spu_unmap_mappings(struct spu_context *ctx)
unmap_mapping_range(ctx->mss, 0, 0x1000, 1);
if (ctx->psmap)
unmap_mapping_range(ctx->psmap, 0, 0x20000, 1);
mutex_unlock(&ctx->mapping_lock);
}
/**

56
arch/powerpc/platforms/cell/spufs/file.c
View File

@ -45,11 +45,11 @@ 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);
mutex_lock(&ctx->mapping_lock);
file->private_data = ctx;
if (!i->i_openers++)
ctx->local_store = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return 0;
}
@ -59,10 +59,10 @@ 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);
mutex_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->local_store = NULL;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return 0;
}
@ -310,11 +310,11 @@ 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);
mutex_lock(&ctx->mapping_lock);
file->private_data = ctx;
if (!i->i_openers++)
ctx->cntl = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return simple_attr_open(inode, file, spufs_cntl_get,
spufs_cntl_set, "0x%08lx");
}
@ -327,10 +327,10 @@ spufs_cntl_release(struct inode *inode, struct file *file)
simple_attr_close(inode, file);
spin_lock(&ctx->mapping_lock);
mutex_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->cntl = NULL;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return 0;
}
@ -813,11 +813,11 @@ 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);
mutex_lock(&ctx->mapping_lock);
file->private_data = ctx;
if (!i->i_openers++)
ctx->signal1 = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
@ -827,10 +827,10 @@ 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);
mutex_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->signal1 = NULL;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return 0;
}
@ -937,11 +937,11 @@ 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);
mutex_lock(&ctx->mapping_lock);
file->private_data = ctx;
if (!i->i_openers++)
ctx->signal2 = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
@ -951,10 +951,10 @@ 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);
mutex_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->signal2 = NULL;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return 0;
}
@ -1155,10 +1155,10 @@ static int spufs_mss_open(struct inode *inode, struct file *file)
file->private_data = i->i_ctx;
spin_lock(&ctx->mapping_lock);
mutex_lock(&ctx->mapping_lock);
if (!i->i_openers++)
ctx->mss = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
@ -1168,10 +1168,10 @@ 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);
mutex_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->mss = NULL;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return 0;
}
@ -1212,11 +1212,11 @@ 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);
mutex_lock(&ctx->mapping_lock);
file->private_data = i->i_ctx;
if (!i->i_openers++)
ctx->psmap = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
@ -1226,10 +1226,10 @@ 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);
mutex_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->psmap = NULL;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return 0;
}
@ -1282,11 +1282,11 @@ 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);
mutex_lock(&ctx->mapping_lock);
file->private_data = ctx;
if (!i->i_openers++)
ctx->mfc = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return nonseekable_open(inode, file);
}
@ -1296,10 +1296,10 @@ 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);
mutex_lock(&ctx->mapping_lock);
if (!--i->i_openers)
ctx->mfc = NULL;
spin_unlock(&ctx->mapping_lock);
mutex_unlock(&ctx->mapping_lock);
return 0;
}

2
arch/powerpc/platforms/cell/spufs/spufs.h
View File

@ -55,7 +55,7 @@ struct spu_context {
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;
struct mutex mapping_lock;
u64 object_id; /* user space pointer for oprofile */
enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;