| Message ID | 1519683651-17003-1-git-send-email-ukrishn@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | cxlflash: OCXL transport support | expand |
On 27/02/18 09:20, Uma Krishnan wrote: > 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. For cxlflash devices only a single > function per host is expected and thus the entire range is assigned. > > 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> > diff --git a/drivers/scsi/cxlflash/ocxl_hw.h b/drivers/scsi/cxlflash/ocxl_hw.h > index 658f420..190d71a 100644 > --- a/drivers/scsi/cxlflash/ocxl_hw.h > +++ b/drivers/scsi/cxlflash/ocxl_hw.h > @@ -18,4 +18,7 @@ struct ocxl_hw_afu { > struct device *dev; /* Generic device */ > > 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 */ These could be u16s. > }; >
Le 26/02/2018 à 23:20, Uma Krishnan a écrit : > 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. For cxlflash devices only a single > function per host is expected and thus the entire range is assigned. > > Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com> > Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> > --- > drivers/scsi/cxlflash/ocxl_hw.c | 15 +++++++++++++++ > drivers/scsi/cxlflash/ocxl_hw.h | 3 +++ > 2 files changed, 18 insertions(+) > > diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c > index dc32a73..39cccb7 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 */ > @@ -56,6 +57,20 @@ static int ocxlflash_config_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu) > if (fcfg->max_afu_index != 0) > 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; > + Since you know your configuration (only 1 function with AFU, all actags to that AFU), you could even have a warning if supported != enabled, to detect suspicious AFU images. Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> > + 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 658f420..190d71a 100644 > --- a/drivers/scsi/cxlflash/ocxl_hw.h > +++ b/drivers/scsi/cxlflash/ocxl_hw.h > @@ -18,4 +18,7 @@ struct ocxl_hw_afu { > struct device *dev; /* Generic device */ > > 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 */ > }; >
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c index dc32a73..39cccb7 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 */ @@ -56,6 +57,20 @@ static int ocxlflash_config_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu) if (fcfg->max_afu_index != 0) 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 658f420..190d71a 100644 --- a/drivers/scsi/cxlflash/ocxl_hw.h +++ b/drivers/scsi/cxlflash/ocxl_hw.h @@ -18,4 +18,7 @@ struct ocxl_hw_afu { struct device *dev; /* Generic device */ 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 */ };