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scsi: cxlflash: Setup AFU PASID

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Per the OCXL specification, the maximum PASID supported by the AFU is
indicated by a field within the configuration space. Similar to acTags,
implementations can choose to use any sub-range of PASID within their assigned
range. For cxlflash, the entire range is used.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Uma Krishnan 2018-03-26 11:31:44 -05:00 committed by Martin K. Petersen
parent d926519e8f
commit 41df40d817
2 changed files with 4 additions and 0 deletions
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3
drivers/scsi/cxlflash/ocxl_hw.c
View File

@ -118,6 +118,9 @@ static int ocxlflash_config_afu(struct pci_dev *pdev, struct ocxl_hw_afu *afu)
dev_dbg(dev, "%s: acTag base=%d enabled=%d\n", __func__, base, count);
afu->afu_actag_base = base;
afu->afu_actag_enabled = count;
afu->max_pasid = 1 << acfg->pasid_supported_log;
ocxl_config_set_afu_pasid(pdev, pos, 0, acfg->pasid_supported_log);
out:
return rc;
}

1
drivers/scsi/cxlflash/ocxl_hw.h
View File

@ -25,5 +25,6 @@ struct ocxl_hw_afu {
int afu_actag_base; /* AFU acTag base */
int afu_actag_enabled; /* AFU acTag number enabled */
int max_pasid; /* Maximum number of contexts */
bool is_present; /* Function has AFUs defined */
};