From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZpsUbkqt5IjlHj7rK4PTqXKmuYWvvk+q8yq26fMThEf8wQdTrjYdJ3HfWaJlEdVO2W9mf7R ARC-Seal: i=1; a=rsa-sha256; t=1525826595; cv=none; d=google.com; s=arc-20160816; b=jQNRczq+gsQiLp/IoOvYsEDUB8WHIA2td3YqQffAZiqX3rSTRSKbXfUKIhXPQ+oOnh 3mOfGeqcAe50xnCeeBYkuYXhorhXJLSeONiHx0MYUFQsNxR2QajYoKW6HtGJevfeUA/l aWO6HaeD7TWynPwyNl7+dyUAlyzm5c2BndvuQYEBkSH0BP08Fd/0Pd++N8VW/NJT6MP8 QDSnPAg17Gr2wBqZZj5eCspXtBrNCTfoVh7o+2l6YrFHNmYHlOMqjQTtbyprNJNrAUAb /wnHzxfgXAdn0yTN3KB4us/DBT495qjv/PVLdMzCSDLZc7ae5FicnxthjaahE41ITYf1 zf5g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:content-transfer-encoding:message-id:references :in-reply-to:date:subject:cc:to:from:arc-authentication-results; bh=bvhutUMlj7O28q6sDcDr8tjWHtm8WJASUXbGYRR6Tew=; b=YVU7Pn01TS2JJye0H6nWIL2HgRxqjow5RgTN/IFzjRJY1Tb5WGJ9Am1pnSBEiv0KAE 9H6ZQtFHMUGGMRlMNnjqrp10r4MjUaNMUUmBIl/iRWyaCrLgvSb3qA7tRV26d4f0x8fS 3iXEz/5Zi95IvRZA5n2Y2jLjWDOBgSrEmYzW6Ll9HdTchMZcekvaeHMAIplcJW+0clZX 3FUJq0zUEHQwgscKJ6GdVCV6qkbKBVWsgJ62k7ssaxkwaD5C+iVOkZNGdqtzzdpUpsTn V6lC/e0Dbi1Puic02A4BK/M7mm+OixaTJJwVwD2hyD92a0/NF5CUfVk6nWV5TcyLRHAF HLJw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of alastair@au1.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=alastair@au1.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of alastair@au1.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=alastair@au1.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com From: "Alastair D'Silva" To: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, mikey@neuling.org, vaibhav@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, malat@debian.org, felix@linux.vnet.ibm.com, pombredanne@nexb.com, sukadev@linux.vnet.ibm.com, npiggin@gmail.com, gregkh@linuxfoundation.org, arnd@arndb.de, andrew.donnellan@au1.ibm.com, fbarrat@linux.vnet.ibm.com, corbet@lwn.net, "Alastair D'Silva" Subject: [PATCH v3 6/7] ocxl: Add an IOCTL so userspace knows what OCXL features are available Date: Wed, 9 May 2018 10:42:11 +1000 X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180509004212.4506-1-alastair@au1.ibm.com> References: <20180417020950.21446-1-alastair@au1.ibm.com> <20180509004212.4506-1-alastair@au1.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18050900-0040-0000-0000-000004379273 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050900-0041-0000-0000-0000263BCFA6 Message-Id: <20180509004212.4506-7-alastair@au1.ibm.com> Content-Type: text/plain Content-Transfer-Encoding: 8bit MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-08_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805090005 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1599945147498054809?= X-GMAIL-MSGID: =?utf-8?q?1599945147498054809?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Alastair D'Silva In order for a userspace AFU driver to call the POWER9 specific OCXL_IOCTL_ENABLE_P9_WAIT, it needs to verify that it can actually make that call. Signed-off-by: Alastair D'Silva --- drivers/misc/ocxl/file.c | 25 +++++++++++++++++++++++++ include/uapi/misc/ocxl.h | 4 ++++ 2 files changed, 29 insertions(+) diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c index eb409a469f21..33ae46ce0a8a 100644 --- a/drivers/misc/ocxl/file.c +++ b/drivers/misc/ocxl/file.c @@ -168,12 +168,32 @@ static long afu_ioctl_enable_p9_wait(struct ocxl_context *ctx, } #endif + +static long afu_ioctl_get_features(struct ocxl_context *ctx, + struct ocxl_ioctl_features __user *uarg) +{ + struct ocxl_ioctl_features arg; + + memset(&arg, 0, sizeof(arg)); + +#ifdef CONFIG_PPC64 + if (cpu_has_feature(CPU_FTR_P9_TIDR)) + arg.flags[0] |= OCXL_IOCTL_FEATURES_FLAGS0_P9_WAIT; +#endif + + if (copy_to_user(uarg, &arg, sizeof(arg))) + return -EFAULT; + + return 0; +} + #define CMD_STR(x) (x == OCXL_IOCTL_ATTACH ? "ATTACH" : \ x == OCXL_IOCTL_IRQ_ALLOC ? "IRQ_ALLOC" : \ x == OCXL_IOCTL_IRQ_FREE ? "IRQ_FREE" : \ x == OCXL_IOCTL_IRQ_SET_FD ? "IRQ_SET_FD" : \ x == OCXL_IOCTL_GET_METADATA ? "GET_METADATA" : \ x == OCXL_IOCTL_ENABLE_P9_WAIT ? "ENABLE_P9_WAIT" : \ + x == OCXL_IOCTL_GET_FEATURES ? "GET_FEATURES" : \ "UNKNOWN") static long afu_ioctl(struct file *file, unsigned int cmd, @@ -239,6 +259,11 @@ static long afu_ioctl(struct file *file, unsigned int cmd, break; #endif + case OCXL_IOCTL_GET_FEATURES: + rc = afu_ioctl_get_features(ctx, + (struct ocxl_ioctl_features __user *) args); + break; + default: rc = -EINVAL; } diff --git a/include/uapi/misc/ocxl.h b/include/uapi/misc/ocxl.h index 8d2748e69c84..bb80f294b429 100644 --- a/include/uapi/misc/ocxl.h +++ b/include/uapi/misc/ocxl.h @@ -55,6 +55,9 @@ struct ocxl_ioctl_p9_wait { __u64 reserved3[3]; }; +#define OCXL_IOCTL_FEATURES_FLAGS0_P9_WAIT 0x01 +struct ocxl_ioctl_features { + __u64 flags[4]; }; struct ocxl_ioctl_irq_fd { @@ -72,5 +75,6 @@ struct ocxl_ioctl_irq_fd { #define OCXL_IOCTL_IRQ_SET_FD _IOW(OCXL_MAGIC, 0x13, struct ocxl_ioctl_irq_fd) #define OCXL_IOCTL_GET_METADATA _IOR(OCXL_MAGIC, 0x14, struct ocxl_ioctl_metadata) #define OCXL_IOCTL_ENABLE_P9_WAIT _IOR(OCXL_MAGIC, 0x15, struct ocxl_ioctl_p9_wait) +#define OCXL_IOCTL_GET_FEATURES _IOR(OCXL_MAGIC, 0x16, struct ocxl_ioctl_platform) #endif /* _UAPI_MISC_OCXL_H */ -- 2.14.3 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id AC4F77DE74 for ; Wed, 9 May 2018 00:45:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933319AbeEIAof (ORCPT ); Tue, 8 May 2018 20:44:35 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:35920 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933494AbeEIAnO (ORCPT ); Tue, 8 May 2018 20:43:14 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w490dxxp134494 for ; Tue, 8 May 2018 20:43:14 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0b-001b2d01.pphosted.com with ESMTP id 2huk3k90qr-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 08 May 2018 20:43:13 -0400 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 9 May 2018 01:43:07 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w490h7OS14287270; Wed, 9 May 2018 00:43:07 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3267F4C05E; Wed, 9 May 2018 01:35:08 +0100 (BST) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D48F04C06D; Wed, 9 May 2018 01:35:07 +0100 (BST) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 9 May 2018 01:35:07 +0100 (BST) Received: from adsilva.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 8E1E8A038E; Wed, 9 May 2018 10:43:03 +1000 (AEST) From: "Alastair D'Silva" To: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, mikey@neuling.org, vaibhav@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, malat@debian.org, felix@linux.vnet.ibm.com, pombredanne@nexb.com, sukadev@linux.vnet.ibm.com, npiggin@gmail.com, gregkh@linuxfoundation.org, arnd@arndb.de, andrew.donnellan@au1.ibm.com, fbarrat@linux.vnet.ibm.com, corbet@lwn.net, "Alastair D'Silva" Subject: [PATCH v3 6/7] ocxl: Add an IOCTL so userspace knows what OCXL features are available Date: Wed, 9 May 2018 10:42:11 +1000 X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180509004212.4506-1-alastair@au1.ibm.com> References: <20180417020950.21446-1-alastair@au1.ibm.com> <20180509004212.4506-1-alastair@au1.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18050900-0040-0000-0000-000004379273 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050900-0041-0000-0000-0000263BCFA6 Message-Id: <20180509004212.4506-7-alastair@au1.ibm.com> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-08_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805090005 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org From: Alastair D'Silva In order for a userspace AFU driver to call the POWER9 specific OCXL_IOCTL_ENABLE_P9_WAIT, it needs to verify that it can actually make that call. Signed-off-by: Alastair D'Silva --- drivers/misc/ocxl/file.c | 25 +++++++++++++++++++++++++ include/uapi/misc/ocxl.h | 4 ++++ 2 files changed, 29 insertions(+) diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c index eb409a469f21..33ae46ce0a8a 100644 --- a/drivers/misc/ocxl/file.c +++ b/drivers/misc/ocxl/file.c @@ -168,12 +168,32 @@ static long afu_ioctl_enable_p9_wait(struct ocxl_context *ctx, } #endif + +static long afu_ioctl_get_features(struct ocxl_context *ctx, + struct ocxl_ioctl_features __user *uarg) +{ + struct ocxl_ioctl_features arg; + + memset(&arg, 0, sizeof(arg)); + +#ifdef CONFIG_PPC64 + if (cpu_has_feature(CPU_FTR_P9_TIDR)) + arg.flags[0] |= OCXL_IOCTL_FEATURES_FLAGS0_P9_WAIT; +#endif + + if (copy_to_user(uarg, &arg, sizeof(arg))) + return -EFAULT; + + return 0; +} + #define CMD_STR(x) (x == OCXL_IOCTL_ATTACH ? "ATTACH" : \ x == OCXL_IOCTL_IRQ_ALLOC ? "IRQ_ALLOC" : \ x == OCXL_IOCTL_IRQ_FREE ? "IRQ_FREE" : \ x == OCXL_IOCTL_IRQ_SET_FD ? "IRQ_SET_FD" : \ x == OCXL_IOCTL_GET_METADATA ? "GET_METADATA" : \ x == OCXL_IOCTL_ENABLE_P9_WAIT ? "ENABLE_P9_WAIT" : \ + x == OCXL_IOCTL_GET_FEATURES ? "GET_FEATURES" : \ "UNKNOWN") static long afu_ioctl(struct file *file, unsigned int cmd, @@ -239,6 +259,11 @@ static long afu_ioctl(struct file *file, unsigned int cmd, break; #endif + case OCXL_IOCTL_GET_FEATURES: + rc = afu_ioctl_get_features(ctx, + (struct ocxl_ioctl_features __user *) args); + break; + default: rc = -EINVAL; } diff --git a/include/uapi/misc/ocxl.h b/include/uapi/misc/ocxl.h index 8d2748e69c84..bb80f294b429 100644 --- a/include/uapi/misc/ocxl.h +++ b/include/uapi/misc/ocxl.h @@ -55,6 +55,9 @@ struct ocxl_ioctl_p9_wait { __u64 reserved3[3]; }; +#define OCXL_IOCTL_FEATURES_FLAGS0_P9_WAIT 0x01 +struct ocxl_ioctl_features { + __u64 flags[4]; }; struct ocxl_ioctl_irq_fd { @@ -72,5 +75,6 @@ struct ocxl_ioctl_irq_fd { #define OCXL_IOCTL_IRQ_SET_FD _IOW(OCXL_MAGIC, 0x13, struct ocxl_ioctl_irq_fd) #define OCXL_IOCTL_GET_METADATA _IOR(OCXL_MAGIC, 0x14, struct ocxl_ioctl_metadata) #define OCXL_IOCTL_ENABLE_P9_WAIT _IOR(OCXL_MAGIC, 0x15, struct ocxl_ioctl_p9_wait) +#define OCXL_IOCTL_GET_FEATURES _IOR(OCXL_MAGIC, 0x16, struct ocxl_ioctl_platform) #endif /* _UAPI_MISC_OCXL_H */ -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html