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authorUma Krishnan <ukrishn@linux.vnet.ibm.com>2018-03-26 19:31:44 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2018-04-19 02:32:48 +0300
commit41df40d817781c9052c8755b612479445e5db638 (patch)
tree248e7a18d36fd4ec60d128cee208ce10b1ebb836 /drivers/scsi/cxlflash
parentd926519e8f9b39d307d97cd4b904e006c309e37e (diff)
downloadlinux-41df40d817781c9052c8755b612479445e5db638.tar.xz
scsi: cxlflash: Setup AFU PASID
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>
Diffstat (limited to 'drivers/scsi/cxlflash')
-rw-r--r--drivers/scsi/cxlflash/ocxl_hw.c3
-rw-r--r--drivers/scsi/cxlflash/ocxl_hw.h1
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 105712b29b2e..44688af7af3a 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi/cxlflash/ocxl_hw.c
@@ -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;
}
diff --git a/drivers/scsi/cxlflash/ocxl_hw.h b/drivers/scsi/cxlflash/ocxl_hw.h
index 21803b52e3be..46de75b59b1a 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.h
+++ b/drivers/scsi/cxlflash/ocxl_hw.h
@@ -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 */
};