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s390: add scm bus driver

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Bus driver to manage Storage Class Memory.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott
2012-08-28 16:46:26 +02:00
committed by Martin Schwidefsky
parent 184b08afb5
commit 1d1c8f78be
4 changed files with 330 additions and 0 deletions
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51
arch/s390/include/asm/eadm.h
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@@ -2,6 +2,8 @@
#define _ASM_S390_EADM_H
#include <linux/types.h>
#include <linux/device.h>
#include <linux/spinlock.h>
struct arqb {
u64 data;
@@ -71,4 +73,53 @@ struct aob {
struct msb msb[AOB_NR_MSB];
} __packed __aligned(PAGE_SIZE);
struct aob_rq_header {
struct scm_device *scmdev;
char data[0];
};
struct scm_device {
u64 address;
u64 size;
unsigned int nr_max_block;
struct device dev;
spinlock_t lock;
struct {
unsigned int persistence:4;
unsigned int oper_state:4;
unsigned int data_state:4;
unsigned int rank:4;
unsigned int release:1;
unsigned int res_id:8;
} __packed attrs;
};
#define OP_STATE_GOOD 1
#define OP_STATE_TEMP_ERR 2
#define OP_STATE_PERM_ERR 3
struct scm_driver {
struct device_driver drv;
int (*probe) (struct scm_device *scmdev);
int (*remove) (struct scm_device *scmdev);
void (*handler) (struct scm_device *scmdev, void *data, int error);
};
int scm_driver_register(struct scm_driver *scmdrv);
void scm_driver_unregister(struct scm_driver *scmdrv);
int scm_start_aob(struct aob *aob);
void scm_irq_handler(struct aob *aob, int error);
struct eadm_ops {
int (*eadm_start) (struct aob *aob);
struct module *owner;
};
int scm_get_ref(void);
void scm_put_ref(void);
void register_eadm_ops(struct eadm_ops *ops);
void unregister_eadm_ops(struct eadm_ops *ops);
#endif /* _ASM_S390_EADM_H */