15f83bb019
The driver core ignores the return value of scmdev_remove() (because there is only little it can do when a device disappears). So make it impossible for future drivers to return an unused error code by changing the remove prototype to return void. The real motivation for this change is the quest to make struct bus_type::remove return void, too. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Vineeth Vijayan <vneethv@linux.ibm.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20210713193522.1770306-5-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
121 lines
2.0 KiB
C
121 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_S390_EADM_H
|
|
#define _ASM_S390_EADM_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/device.h>
|
|
#include <linux/blk_types.h>
|
|
|
|
struct arqb {
|
|
u64 data;
|
|
u16 fmt:4;
|
|
u16:12;
|
|
u16 cmd_code;
|
|
u16:16;
|
|
u16 msb_count;
|
|
u32 reserved[12];
|
|
} __packed;
|
|
|
|
#define ARQB_CMD_MOVE 1
|
|
|
|
struct arsb {
|
|
u16 fmt:4;
|
|
u32:28;
|
|
u8 ef;
|
|
u8:8;
|
|
u8 ecbi;
|
|
u8:8;
|
|
u8 fvf;
|
|
u16:16;
|
|
u8 eqc;
|
|
u32:32;
|
|
u64 fail_msb;
|
|
u64 fail_aidaw;
|
|
u64 fail_ms;
|
|
u64 fail_scm;
|
|
u32 reserved[4];
|
|
} __packed;
|
|
|
|
#define EQC_WR_PROHIBIT 22
|
|
|
|
struct msb {
|
|
u8 fmt:4;
|
|
u8 oc:4;
|
|
u8 flags;
|
|
u16:12;
|
|
u16 bs:4;
|
|
u32 blk_count;
|
|
u64 data_addr;
|
|
u64 scm_addr;
|
|
u64:64;
|
|
} __packed;
|
|
|
|
struct aidaw {
|
|
u8 flags;
|
|
u32 :24;
|
|
u32 :32;
|
|
u64 data_addr;
|
|
} __packed;
|
|
|
|
#define MSB_OC_CLEAR 0
|
|
#define MSB_OC_READ 1
|
|
#define MSB_OC_WRITE 2
|
|
#define MSB_OC_RELEASE 3
|
|
|
|
#define MSB_FLAG_BNM 0x80
|
|
#define MSB_FLAG_IDA 0x40
|
|
|
|
#define MSB_BS_4K 0
|
|
#define MSB_BS_1M 1
|
|
|
|
#define AOB_NR_MSB 124
|
|
|
|
struct aob {
|
|
struct arqb request;
|
|
struct arsb response;
|
|
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;
|
|
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
|
|
|
|
enum scm_event {SCM_CHANGE, SCM_AVAIL};
|
|
|
|
struct scm_driver {
|
|
struct device_driver drv;
|
|
int (*probe) (struct scm_device *scmdev);
|
|
void (*remove) (struct scm_device *scmdev);
|
|
void (*notify) (struct scm_device *scmdev, enum scm_event event);
|
|
void (*handler) (struct scm_device *scmdev, void *data,
|
|
blk_status_t error);
|
|
};
|
|
|
|
int scm_driver_register(struct scm_driver *scmdrv);
|
|
void scm_driver_unregister(struct scm_driver *scmdrv);
|
|
|
|
int eadm_start_aob(struct aob *aob);
|
|
void scm_irq_handler(struct aob *aob, blk_status_t error);
|
|
|
|
#endif /* _ASM_S390_EADM_H */
|