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Commit e570beb6 authored by Christian Krafft's avatar Christian Krafft Committed by Paul Mackerras
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[POWERPC] cell: add support for registering sysfs attributes to spus 



In order to add sysfs attributes to all spu's, there is a
need for a list of all available spu's. Adding the device_node
makes also sense, as it is needed for proper register access.
This patch also adds two functions to create and remove sysfs
attributes and attribute_groups to all spus.
That allows to group spu attributes in a subdirectory like:
/sys/devices/system/spu/spuX/group_name/what_ever
This will be used by cbe_thermal to group all attributes dealing with
thermal support in one directory.

Signed-off-by: default avatarChristian Krafft <krafft@de.ibm.com>
Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent d8bf96e0

arch/powerpc/platforms/cell/spu_base.c

+58 −0
Original line number Diff line number Diff line
@@ -333,6 +333,7 @@ static void spu_free_irqs(struct spu *spu) 
}



static struct list_head spu_list[MAX_NUMNODES];

static LIST_HEAD(spu_full_list);

static DEFINE_MUTEX(spu_mutex);



static void spu_init_channels(struct spu *spu)
@@ -744,6 +745,57 @@ struct sysdev_class spu_sysdev_class = { 
	set_kset_name("spu")

};



int spu_add_sysdev_attr(struct sysdev_attribute *attr)

{

	struct spu *spu;

	mutex_lock(&spu_mutex);



	list_for_each_entry(spu, &spu_full_list, full_list)

		sysdev_create_file(&spu->sysdev, attr);



	mutex_unlock(&spu_mutex);

	return 0;

}

EXPORT_SYMBOL_GPL(spu_add_sysdev_attr);



int spu_add_sysdev_attr_group(struct attribute_group *attrs)

{

	struct spu *spu;

	mutex_lock(&spu_mutex);



	list_for_each_entry(spu, &spu_full_list, full_list)

		sysfs_create_group(&spu->sysdev.kobj, attrs);



	mutex_unlock(&spu_mutex);

	return 0;

}

EXPORT_SYMBOL_GPL(spu_add_sysdev_attr_group);





void spu_remove_sysdev_attr(struct sysdev_attribute *attr)

{

	struct spu *spu;

	mutex_lock(&spu_mutex);



	list_for_each_entry(spu, &spu_full_list, full_list)

		sysdev_remove_file(&spu->sysdev, attr);



	mutex_unlock(&spu_mutex);

}

EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr);



void spu_remove_sysdev_attr_group(struct attribute_group *attrs)

{

	struct spu *spu;

	mutex_lock(&spu_mutex);



	list_for_each_entry(spu, &spu_full_list, full_list)

		sysfs_remove_group(&spu->sysdev.kobj, attrs);



	mutex_unlock(&spu_mutex);

}

EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr_group);



static int spu_create_sysdev(struct spu *spu)

{

	int ret;
@@ -817,6 +869,9 @@ static int __init create_spu(struct device_node *spe) 
		goto out_free_irqs;



	list_add(&spu->list, &spu_list[spu->node]);

	list_add(&spu->full_list, &spu_full_list);

	spu->devnode = of_node_get(spe);



	mutex_unlock(&spu_mutex);



	pr_debug(KERN_DEBUG "Using SPE %s %p %p %p %p %d\n",
@@ -839,6 +894,9 @@ static int __init create_spu(struct device_node *spe) 
static void destroy_spu(struct spu *spu)

{

	list_del_init(&spu->list);

	list_del_init(&spu->full_list);



	of_node_put(spu->devnode);



	spu_destroy_sysdev(spu);

	spu_free_irqs(spu);

include/asm-powerpc/spu.h

+9 −0
Original line number Diff line number Diff line
@@ -115,6 +115,7 @@ struct spu { 
	struct spu_priv2 __iomem *priv2;

	struct list_head list;

	struct list_head sched_list;

	struct list_head full_list;

	int number;

	int nid;

	unsigned int irqs[3];
@@ -143,6 +144,8 @@ struct spu { 
	char irq_c1[8];

	char irq_c2[8];



	struct device_node *devnode;



	struct sys_device sysdev;

};
@@ -200,6 +203,12 @@ static inline void unregister_spu_syscalls(struct spufs_calls *calls) 
}

#endif /* MODULE */



int spu_add_sysdev_attr(struct sysdev_attribute *attr);

void spu_remove_sysdev_attr(struct sysdev_attribute *attr);



int spu_add_sysdev_attr_group(struct attribute_group *attrs);

void spu_remove_sysdev_attr_group(struct attribute_group *attrs);





/*

 * Notifier blocks: