diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2012-08-28 16:46:26 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-09-26 15:44:59 +0200 |
| commit | 1d1c8f78bed5f8e769757525bd9c2dec69f11a44 (patch) | |
| tree | 75f1ef4eb3836975e46a86fad456e8bafa1a5ffe /arch/s390 | |
| parent | 184b08afb5eab8a43d75f4aa0a0f912653f797d7 (diff) | |
s390: add scm bus driver
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>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/Kconfig | 7 | ||||
| -rw-r--r-- | arch/s390/include/asm/eadm.h | 51 |
2 files changed, 58 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 443fac9f164..3781db22f42 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -433,6 +433,13 @@ config CHSC_SCH If unsure, say N. +config SCM_BUS + def_bool y + depends on 64BIT + prompt "SCM bus driver" + help + Bus driver for Storage Class Memory. + endmenu menu "Dump support" diff --git a/arch/s390/include/asm/eadm.h b/arch/s390/include/asm/eadm.h index 4a65803baa0..3922f525717 100644 --- a/arch/s390/include/asm/eadm.h +++ b/arch/s390/include/asm/eadm.h @@ -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 */ |