diff options
| author | Matthew R. Ochs <mrochs@linux.vnet.ibm.com> | 2017-04-12 22:15:53 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-04-14 05:55:42 +0300 |
| commit | 3065267a80c88d775e8eb34196280e8eee33322f (patch) | |
| tree | 258a79921e0fe61e2b9b12efe1b26a41d1179ff6 /drivers/scsi/cxlflash/common.h | |
| parent | bfc0bab172cabf3bb25c48c4c521b317ff4a909d (diff) | |
| download | linux-3065267a80c88d775e8eb34196280e8eee33322f.tar.xz | |
scsi: cxlflash: Add hardware queues attribute
As staging for supporting multiple hardware queues, add an attribute to show
and set the current number of hardware queues for the host. Support specifying
a hard limit or a CPU affinitized value. This will allow the number of
hardware queues to be tuned by a system administrator.
Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/cxlflash/common.h')
| -rw-r--r-- | drivers/scsi/cxlflash/common.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h index b5858ae1deae..8fd7a1fa235e 100644 --- a/drivers/scsi/cxlflash/common.h +++ b/drivers/scsi/cxlflash/common.h @@ -60,7 +60,9 @@ extern const struct file_operations cxlflash_cxl_fops; /* SQ for master issued cmds */ #define NUM_SQ_ENTRY CXLFLASH_MAX_CMDS -#define CXLFLASH_NUM_HWQS 1 +/* Hardware queue definitions */ +#define CXLFLASH_DEF_HWQS 1 +#define CXLFLASH_MAX_HWQS 8 #define PRIMARY_HWQ 0 @@ -201,7 +203,7 @@ struct hwq { } __aligned(cache_line_size()); struct afu { - struct hwq hwqs[CXLFLASH_NUM_HWQS]; + struct hwq hwqs[CXLFLASH_MAX_HWQS]; int (*send_cmd)(struct afu *, struct afu_cmd *); void (*context_reset)(struct afu_cmd *); @@ -211,6 +213,8 @@ struct afu { atomic_t cmds_active; /* Number of currently active AFU commands */ u64 hb; u32 internal_lun; /* User-desired LUN mode for this AFU */ + u32 num_hwqs; /* Number of hardware queues */ + u32 desired_hwqs; /* Desired h/w queues, effective on AFU reset */ char version[16]; u64 interface_version; @@ -221,7 +225,7 @@ struct afu { static inline struct hwq *get_hwq(struct afu *afu, u32 index) { - WARN_ON(index >= CXLFLASH_NUM_HWQS); + WARN_ON(index >= CXLFLASH_MAX_HWQS); return &afu->hwqs[index]; } |