[PATCH v2 10/38] cxlflash: Setup AFU PASID
From: Uma Krishnan <hidden>
Date: 2018-02-26 22:21:33
Also in:
linux-scsi
Subsystem:
scsi subsystem, the rest · Maintainers:
"James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
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 <redacted> Acked-by: Matthew R. Ochs <redacted> --- drivers/scsi/cxlflash/ocxl_hw.c | 3 +++ drivers/scsi/cxlflash/ocxl_hw.h | 2 ++ 2 files changed, 5 insertions(+)
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index d01847d9..bd86eef 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 9c675fa..a6f7796 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 */ };
--
2.1.0