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| author | Matthew R. Ochs <mrochs@linux.vnet.ibm.com> | 2017-04-12 22:14:05 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-04-14 05:55:41 +0300 |
| commit | 8fa4f1770d56af6f0a5a862f1fd298a4eeea94f3 (patch) | |
| tree | d3d4bff0c8c1f1836861000f0a4ccc4a1025cd3e /drivers/scsi/cxlflash/common.h | |
| parent | 78ae028e823701148e4915759459ee79597ea8ec (diff) | |
| download | linux-8fa4f1770d56af6f0a5a862f1fd298a4eeea94f3.tar.xz | |
scsi: cxlflash: Remove port configuration assumptions
At present, the cxlflash driver only supports hardware with two FC ports. The
code was initially designed with this assumption and is dependent on having
two FC ports - adding more ports will break logic within the driver.
To mitigate this issue, remove the existing port assumptions and transition
the code to support more than two ports. As a side effect, clarify the
interpretation of the DK_CXLFLASH_ALL_PORTS_ACTIVE flag.
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 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h index 6a04867a0eec..ee23e81994c4 100644 --- a/drivers/scsi/cxlflash/common.h +++ b/drivers/scsi/cxlflash/common.h @@ -29,6 +29,10 @@ extern const struct file_operations cxlflash_cxl_fops; #define NUM_FC_PORTS CXLFLASH_NUM_FC_PORTS /* ports per AFU */ #define MAX_FC_PORTS CXLFLASH_MAX_FC_PORTS /* ports per AFU */ +#define CHAN2PORTMASK(_x) (1 << (_x)) /* channel to port mask */ +#define PORTMASK2CHAN(_x) (ilog2((_x))) /* port mask to channel */ +#define PORTNUM2CHAN(_x) ((_x) - 1) /* port number to channel */ + #define CXLFLASH_BLOCK_SIZE 4096 /* 4K blocks */ #define CXLFLASH_MAX_XFER_SIZE 16777216 /* 16MB transfer */ #define CXLFLASH_MAX_SECTORS (CXLFLASH_MAX_XFER_SIZE/512) /* SCSI wants |