diff mbox

[10/38] cxlflash: Setup AFU PASID

Message ID 1519338240-52145-1-git-send-email-ukrishn@linux.vnet.ibm.com (mailing list archive)
State Superseded
Headers show

Commit Message

Uma Krishnan Feb. 22, 2018, 10:24 p.m. UTC 
Per the OpenCXL 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>
---
 drivers/scsi/cxlflash/ocxl_hw.c | 3 +++
 drivers/scsi/cxlflash/ocxl_hw.h | 2 ++
 2 files changed, 5 insertions(+)
diff mbox

Patch

diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 3875ed4..677bc34 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi/cxlflash/ocxl_hw.c
@@ -111,6 +111,9 @@  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 a0ef04c..a807656 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.h
+++ b/drivers/scsi/cxlflash/ocxl_hw.h
@@ -24,4 +24,6 @@  struct ocxl_hw_afu {
 	int fn_actag_enabled;		/* Function acTag number enabled */
 	int afu_actag_base;		/* AFU acTag base */
 	int afu_actag_enabled;		/* AFU acTag number enabled */
+
+	int max_pasid;			/* Maximum number of contexts */
 };