linux/drivers/s390/block/scm_blk.h
Linus Torvalds d60a540ac5 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
 "Since Martin is on vacation you get the s390 pull request for the
  v4.15 merge window this time from me.

  Besides a lot of cleanups and bug fixes these are the most important
  changes:

   - a new regset for runtime instrumentation registers

   - hardware accelerated AES-GCM support for the aes_s390 module

   - support for the new CEX6S crypto cards

   - support for FORTIFY_SOURCE

   - addition of missing z13 and new z14 instructions to the in-kernel
     disassembler

   - generate opcode tables for the in-kernel disassembler out of a
     simple text file instead of having to manually maintain those
     tables

   - fast memset16, memset32 and memset64 implementations

   - removal of named saved segment support

   - hardware counter support for z14

   - queued spinlocks and queued rwlocks implementations for s390

   - use the stack_depth tracking feature for s390 BPF JIT

   - a new s390_sthyi system call which emulates the sthyi (store
     hypervisor information) instruction

   - removal of the old KVM virtio transport

   - an s390 specific CPU alternatives implementation which is used in
     the new spinlock code"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (88 commits)
  MAINTAINERS: add virtio-ccw.h to virtio/s390 section
  s390/noexec: execute kexec datamover without DAT
  s390: fix transactional execution control register handling
  s390/bpf: take advantage of stack_depth tracking
  s390: simplify transactional execution elf hwcap handling
  s390/zcrypt: Rework struct ap_qact_ap_info.
  s390/virtio: remove unused header file kvm_virtio.h
  s390: avoid undefined behaviour
  s390/disassembler: generate opcode tables from text file
  s390/disassembler: remove insn_to_mnemonic()
  s390/dasd: avoid calling do_gettimeofday()
  s390: vfio-ccw: Do not attempt to free no-op, test and tic cda.
  s390: remove named saved segment support
  s390/archrandom: Reconsider s390 arch random implementation
  s390/pci: do not require AIS facility
  s390/qdio: sanitize put_indicator
  s390/qdio: use atomic_cmpxchg
  s390/nmi: avoid using long-displacement facility
  s390: pass endianness info to sparse
  s390/decompressor: remove informational messages
  ...
2017-11-13 11:47:01 -08:00

78 lines
1.7 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef SCM_BLK_H
#define SCM_BLK_H
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
#include <linux/blk-mq.h>
#include <linux/genhd.h>
#include <linux/list.h>
#include <asm/debug.h>
#include <asm/eadm.h>
#define SCM_NR_PARTS 8
#define SCM_QUEUE_DELAY 5
struct scm_blk_dev {
struct request_queue *rq;
struct gendisk *gendisk;
struct blk_mq_tag_set tag_set;
struct scm_device *scmdev;
spinlock_t lock;
atomic_t queued_reqs;
enum {SCM_OPER, SCM_WR_PROHIBIT} state;
struct list_head finished_requests;
};
struct scm_request {
struct scm_blk_dev *bdev;
struct aidaw *next_aidaw;
struct request **request;
struct aob *aob;
struct list_head list;
u8 retries;
blk_status_t error;
};
#define to_aobrq(rq) container_of((void *) rq, struct aob_rq_header, data)
int scm_blk_dev_setup(struct scm_blk_dev *, struct scm_device *);
void scm_blk_dev_cleanup(struct scm_blk_dev *);
void scm_blk_set_available(struct scm_blk_dev *);
void scm_blk_irq(struct scm_device *, void *, blk_status_t);
struct aidaw *scm_aidaw_fetch(struct scm_request *scmrq, unsigned int bytes);
int scm_drv_init(void);
void scm_drv_cleanup(void);
extern debug_info_t *scm_debug;
#define SCM_LOG(imp, txt) do { \
debug_text_event(scm_debug, imp, txt); \
} while (0)
static inline void SCM_LOG_HEX(int level, void *data, int length)
{
debug_event(scm_debug, level, data, length);
}
static inline void SCM_LOG_STATE(int level, struct scm_device *scmdev)
{
struct {
u64 address;
u8 oper_state;
u8 rank;
} __packed data = {
.address = scmdev->address,
.oper_state = scmdev->attrs.oper_state,
.rank = scmdev->attrs.rank,
};
SCM_LOG_HEX(level, &data, sizeof(data));
}
#endif /* SCM_BLK_H */