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| author | Sebastian Ott | 2012-08-28 16:51:19 +0200 |
|---|---|---|
| committer | Martin Schwidefsky | 2012-09-26 15:45:01 +0200 |
| commit | 0d804b20735d974534abb422f723d404b779433a (patch) | |
| tree | 5ca065600a604eec5c45878cb0f432fb5c2b397d /drivers/s390/block/scm_blk.h | |
| parent | s390: add scm block driver (diff) | |
| download | kernel-qcow2-linux-0d804b20735d974534abb422f723d404b779433a.tar.gz kernel-qcow2-linux-0d804b20735d974534abb422f723d404b779433a.tar.xz kernel-qcow2-linux-0d804b20735d974534abb422f723d404b779433a.zip | |
s390/scm_block: force cluster writes
Force writes to Storage Class Memory (SCM) to be in done in clusters.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/scm_blk.h')
| -rw-r--r-- | drivers/s390/block/scm_blk.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/s390/block/scm_blk.h b/drivers/s390/block/scm_blk.h index 5aba5612588f..7ac6bad919ef 100644 --- a/drivers/s390/block/scm_blk.h +++ b/drivers/s390/block/scm_blk.h @@ -22,6 +22,9 @@ struct scm_blk_dev { spinlock_t lock; /* guard the rest of the blockdev */ atomic_t queued_reqs; struct list_head finished_requests; +#ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE + struct list_head cluster_list; +#endif }; struct scm_request { @@ -32,6 +35,13 @@ struct scm_request { struct list_head list; u8 retries; int error; +#ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE + struct { + enum {CLUSTER_NONE, CLUSTER_READ, CLUSTER_WRITE} state; + struct list_head list; + void **buf; + } cluster; +#endif }; #define to_aobrq(rq) container_of((void *) rq, struct aob_rq_header, data) @@ -40,9 +50,37 @@ int scm_blk_dev_setup(struct scm_blk_dev *, struct scm_device *); void scm_blk_dev_cleanup(struct scm_blk_dev *); void scm_blk_irq(struct scm_device *, void *, int); +void scm_request_finish(struct scm_request *); +void scm_request_requeue(struct scm_request *); + int scm_drv_init(void); void scm_drv_cleanup(void); +#ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE +void __scm_free_rq_cluster(struct scm_request *); +int __scm_alloc_rq_cluster(struct scm_request *); +void scm_request_cluster_init(struct scm_request *); +bool scm_reserve_cluster(struct scm_request *); +void scm_release_cluster(struct scm_request *); +void scm_blk_dev_cluster_setup(struct scm_blk_dev *); +bool scm_need_cluster_request(struct scm_request *); +void scm_initiate_cluster_request(struct scm_request *); +void scm_cluster_request_irq(struct scm_request *); +bool scm_test_cluster_request(struct scm_request *); +bool scm_cluster_size_valid(void); +#else +#define __scm_free_rq_cluster(scmrq) {} +#define __scm_alloc_rq_cluster(scmrq) 0 +#define scm_request_cluster_init(scmrq) {} +#define scm_reserve_cluster(scmrq) true +#define scm_release_cluster(scmrq) {} +#define scm_blk_dev_cluster_setup(bdev) {} +#define scm_need_cluster_request(scmrq) false +#define scm_initiate_cluster_request(scmrq) {} +#define scm_cluster_request_irq(scmrq) {} +#define scm_test_cluster_request(scmrq) false +#define scm_cluster_size_valid() true +#endif extern debug_info_t *scm_debug; |