diff options
| author | Uma Krishnan <ukrishn@linux.vnet.ibm.com> | 2018-03-26 11:31:21 -0500 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-04-18 19:32:48 -0400 |
| commit | 2e222779aea6ca93d371185b6cb134734cbf80de (patch) | |
| tree | 6838374e2390dc4c53bdfe3588683552d684805d /drivers/scsi/cxlflash | |
| parent | e9dfceda92ae6c59041e7256de137b6132f37cdf (diff) | |
scsi: cxlflash: Setup function acTag range
The OCXL specification supports distributing acTags amongst different AFUs and
functions on the link. The platform-specific acTag range for the link is
obtained using the OCXL provider services and then assigned to the host
function based on implementation.
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.c | 15 | ||||
| -rw-r--r-- | drivers/scsi/cxlflash/ocxl_hw.h | 3 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c index 85c0f84f2a68..778384237b8c 100644 --- a/drivers/scsi/cxlflash/ocxl_hw.c +++ b/drivers/scsi/cxlflash/ocxl_hw.c @@ -42,6 +42,7 @@ static int ocxlflash_config_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu) { struct ocxl_fn_config *fcfg = &afu->fcfg; struct device *dev = &pdev->dev; + u16 base, enabled, supported; int rc = 0; /* Read DVSEC config of the function */ @@ -59,6 +60,20 @@ static int ocxlflash_config_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu) dev_warn(dev, "%s: Unexpected AFU index value %d\n", __func__, fcfg->max_afu_index); } + + rc = ocxl_config_get_actag_info(pdev, &base, &enabled, &supported); + if (unlikely(rc)) { + dev_err(dev, "%s: ocxl_config_get_actag_info failed rc=%d\n", + __func__, rc); + goto out; + } + + afu->fn_actag_base = base; + afu->fn_actag_enabled = enabled; + + ocxl_config_set_actag(pdev, fcfg->dvsec_function_pos, base, enabled); + dev_dbg(dev, "%s: Function acTag range base=%u enabled=%u\n", + __func__, base, enabled); out: return rc; } diff --git a/drivers/scsi/cxlflash/ocxl_hw.h b/drivers/scsi/cxlflash/ocxl_hw.h index 356a6a36be5c..55e833cb0890 100644 --- a/drivers/scsi/cxlflash/ocxl_hw.h +++ b/drivers/scsi/cxlflash/ocxl_hw.h @@ -19,5 +19,8 @@ struct ocxl_hw_afu { struct ocxl_fn_config fcfg; /* DVSEC config of the function */ + int fn_actag_base; /* Function acTag base */ + int fn_actag_enabled; /* Function acTag number enabled */ + bool is_present; /* Function has AFUs defined */ }; |