The OpenCXL specification supports distributing acTags amongst different
AFUs and functions on the link. As cxlflash devices are expected to only
support a single AFU and function, the entire range that was assigned to
the function is also assigned to the AFU.

Signed-off-by: Uma Krishnan <ukri...@linux.vnet.ibm.com>
---
 drivers/scsi/cxlflash/ocxl_hw.c | 13 +++++++++++++
 drivers/scsi/cxlflash/ocxl_hw.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 8e48480..3875ed4 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi/cxlflash/ocxl_hw.c
@@ -89,6 +89,9 @@ static int ocxlflash_config_afu(struct pci_dev *pdev, struct 
ocxl_hw_afu *afu)
        struct ocxl_afu_config *acfg = &afu->acfg;
        struct ocxl_fn_config *fcfg = &afu->fcfg;
        struct device *dev = &pdev->dev;
+       int count;
+       int base;
+       int pos;
        int rc = 0;
 
        /* Read AFU config at index 0 */
@@ -98,6 +101,16 @@ static int ocxlflash_config_afu(struct pci_dev *pdev, 
struct ocxl_hw_afu *afu)
                        __func__, rc);
                goto out;
        }
+
+       /* Only one AFU per function is supported, so actag_base is same */
+       base = afu->fn_actag_base;
+       count = min_t(int, acfg->actag_supported, afu->fn_actag_enabled);
+       pos = acfg->dvsec_afu_control_pos;
+
+       ocxl_config_set_afu_actag(pdev, pos, base, count);
+       dev_dbg(dev, "%s: acTag base=%d enabled=%d\n", __func__, base, count);
+       afu->afu_actag_base = base;
+       afu->afu_actag_enabled = count;
 out:
        return rc;
 }
diff --git a/drivers/scsi/cxlflash/ocxl_hw.h b/drivers/scsi/cxlflash/ocxl_hw.h
index 29fd338..a0ef04c 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.h
+++ b/drivers/scsi/cxlflash/ocxl_hw.h
@@ -22,4 +22,6 @@ struct ocxl_hw_afu {
 
        int fn_actag_base;              /* Function acTag base */
        int fn_actag_enabled;           /* Function acTag number enabled */
+       int afu_actag_base;             /* AFU acTag base */
+       int afu_actag_enabled;          /* AFU acTag number enabled */
 };
-- 
2.1.0

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