From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3zqxB64cjczDqG5 for ; Tue, 27 Feb 2018 09:21:18 +1100 (AEDT) Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w1QMJAox117808 for ; Mon, 26 Feb 2018 17:21:16 -0500 Received: from e19.ny.us.ibm.com (e19.ny.us.ibm.com [129.33.205.209]) by mx0a-001b2d01.pphosted.com with ESMTP id 2gcs0kc63q-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 26 Feb 2018 17:21:15 -0500 Received: from localhost by e19.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 26 Feb 2018 17:21:14 -0500 From: Uma Krishnan To: linux-scsi@vger.kernel.org, James Bottomley , "Martin K. Petersen" , "Matthew R. Ochs" , "Manoj N. Kumar" Cc: linuxppc-dev@lists.ozlabs.org, Andrew Donnellan , Frederic Barrat , Christophe Lombard Subject: [PATCH v2 09/38] cxlflash: Setup AFU acTag range Date: Mon, 26 Feb 2018 16:21:09 -0600 In-Reply-To: <1519683513-16731-1-git-send-email-ukrishn@linux.vnet.ibm.com> References: <1519683513-16731-1-git-send-email-ukrishn@linux.vnet.ibm.com> Message-Id: <1519683669-17075-1-git-send-email-ukrishn@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The OCXL 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 Acked-by: Matthew R. Ochs --- 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 2325030..d01847d9 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 f6af247..9c675fa 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