Received: by 2002:a25:d7c1:0:0:0:0:0 with SMTP id o184csp4034616ybg; Fri, 25 Oct 2019 12:22:44 -0700 (PDT) X-Google-Smtp-Source: APXvYqwIEd76a11fI6d5KgH0ouXzy/QaygiCfyEBhkr+tRj6kJOMfzVAdGN0fkwJoQ/5TnRtGyW1 X-Received: by 2002:a17:906:bcfb:: with SMTP id op27mr4472542ejb.59.1572031364332; Fri, 25 Oct 2019 12:22:44 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1572031364; cv=none; d=google.com; s=arc-20160816; b=P+w4PPER4c7kRfAptYDZ8DvPcU/avIX5SOg3X4Haxe5+8a4lAf4mN4E1MLk0sjMZ6K 6hexcaIsq9QvoRw7JD/+il/YJLzWT/uvbqzyjcxkOFJ9/J/AIDHv5O3L/xV8/LkOIR74 g+uufiem5mttx+gVVKG4IlThy5Dq1Hjgcc32YyIXQ4Mf1lazCeiMf6XuAprRVf3TQgMb ru0IJ75xWCG0Hc4SOqnyNA1L1Gbh9B53Ri3VT7oACcxczirLJ81nNlofXZVvpe4J91QO +hCV4/jbMlzqpCkWLDMuKV1wjbHixsW+KsbibRoaWZ0/RrSba+blQ6pkSqVSO2p3ZXiN CeIQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:content-transfer-encoding :mime-version:references:in-reply-to:date:subject:cc:to:from; bh=4SmC/SSbG0m29aA+usS4WIiE06o81pGj/wBCaybNz/A=; b=rmgku0htGBXv6R7cciTZAjUKqqnueaoYmGfJrB6ANYUBvHDEYmfF+oCHvODDSXh0LZ xToE2LeUP76iuoVs9oGnK1Wk+XNlyPiJFUCT1STdYr97+RwcEqipp/q9z7PzJqr8jPbn fkUaAQDU20Mv0VGHfCLWimQmZSa8gEkjUcDhvYwK1l/bm+6p7q20GrsxqP8IrabJ/FKP c/kAQn675v4pcYUYqBpv41NLpQ29/5xxTkCIwXfZUlRHVQ0z5tmRrKFYVEPpEPbI8E52 G5lQEQpuOhG8qYHYn+c2jT5LYjAFUh3wJz6PgwowW7Ovr7enl39c/2pl7EnDtbyfxRI7 gb6Q== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id dt26si1696581ejb.38.2019.10.25.12.22.20; Fri, 25 Oct 2019 12:22:44 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392363AbfJYEt6 (ORCPT + 99 others); Fri, 25 Oct 2019 00:49:58 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:65108 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387990AbfJYEt5 (ORCPT ); Fri, 25 Oct 2019 00:49:57 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9P4losf145829 for ; Fri, 25 Oct 2019 00:49:56 -0400 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2vuqc2mtjx-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 25 Oct 2019 00:49:56 -0400 Received: from localhost by e06smtp05.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 25 Oct 2019 05:49:53 +0100 Received: from b06cxnps4076.portsmouth.uk.ibm.com (9.149.109.198) by e06smtp05.uk.ibm.com (192.168.101.135) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 25 Oct 2019 05:49:44 +0100 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9P4nhfj51445940 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 Oct 2019 04:49:43 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C74B7A405C; Fri, 25 Oct 2019 04:49:43 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2B699A405B; Fri, 25 Oct 2019 04:49:43 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 25 Oct 2019 04:49:43 +0000 (GMT) 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 6FFF6A0147; Fri, 25 Oct 2019 15:49:41 +1100 (AEDT) From: "Alastair D'Silva" To: alastair@d-silva.org Cc: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Frederic Barrat , Andrew Donnellan , Arnd Bergmann , Greg Kroah-Hartman , Dan Williams , Vishal Verma , Dave Jiang , Keith Busch , Ira Weiny , Krzysztof Kozlowski , Anton Blanchard , Allison Randal , Madhavan Srinivasan , Mahesh Salgaonkar , Hari Bathini , Thomas Gleixner , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Greg Kurz , Alexey Kardashevskiy , David Gibson , Masahiro Yamada , Andrew Morton , David Hildenbrand , Oscar Salvador , Michal Hocko , Pavel Tatashin , Wei Yang , Qian Cai , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-mm@kvack.org Subject: [PATCH 05/10] ocxl: Tally up the LPC memory on a link & allow it to be mapped Date: Fri, 25 Oct 2019 15:47:00 +1100 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191025044721.16617-1-alastair@au1.ibm.com> References: <20191025044721.16617-1-alastair@au1.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19102504-0020-0000-0000-0000037E3ED5 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19102504-0021-0000-0000-000021D488F3 Message-Id: <20191025044721.16617-6-alastair@au1.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-10-25_02:,, 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 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910250045 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alastair D'Silva Tally up the LPC memory on an OpenCAPI link & allow it to be mapped Signed-off-by: Alastair D'Silva --- drivers/misc/ocxl/core.c | 10 ++++++ drivers/misc/ocxl/link.c | 60 +++++++++++++++++++++++++++++++ drivers/misc/ocxl/ocxl_internal.h | 33 +++++++++++++++++ 3 files changed, 103 insertions(+) diff --git a/drivers/misc/ocxl/core.c b/drivers/misc/ocxl/core.c index b7a09b21ab36..2531c6cf19a0 100644 --- a/drivers/misc/ocxl/core.c +++ b/drivers/misc/ocxl/core.c @@ -230,8 +230,18 @@ static int configure_afu(struct ocxl_afu *afu, u8 afu_idx, struct pci_dev *dev) if (rc) goto err_free_pasid; + if (afu->config.lpc_mem_size || afu->config.special_purpose_mem_size) { + rc = ocxl_link_add_lpc_mem(afu->fn->link, afu->config.lpc_mem_offset, + afu->config.lpc_mem_size + + afu->config.special_purpose_mem_size); + if (rc) + goto err_free_mmio; + } + return 0; +err_free_mmio: + unmap_mmio_areas(afu); err_free_pasid: reclaim_afu_pasid(afu); err_free_actag: diff --git a/drivers/misc/ocxl/link.c b/drivers/misc/ocxl/link.c index 58d111afd9f6..1d350d0bb860 100644 --- a/drivers/misc/ocxl/link.c +++ b/drivers/misc/ocxl/link.c @@ -84,6 +84,11 @@ struct ocxl_link { int dev; atomic_t irq_available; struct spa *spa; + struct mutex lpc_mem_lock; + u64 lpc_mem_sz; /* Total amount of LPC memory presented on the link */ + u64 lpc_mem; + int lpc_consumers; + void *platform_data; }; static struct list_head links_list = LIST_HEAD_INIT(links_list); @@ -396,6 +401,8 @@ static int alloc_link(struct pci_dev *dev, int PE_mask, struct ocxl_link **out_l if (rc) goto err_spa; + mutex_init(&link->lpc_mem_lock); + /* platform specific hook */ rc = pnv_ocxl_spa_setup(dev, link->spa->spa_mem, PE_mask, &link->platform_data); @@ -711,3 +718,56 @@ void ocxl_link_free_irq(void *link_handle, int hw_irq) atomic_inc(&link->irq_available); } EXPORT_SYMBOL_GPL(ocxl_link_free_irq); + +int ocxl_link_add_lpc_mem(void *link_handle, u64 offset, u64 size) +{ + struct ocxl_link *link = (struct ocxl_link *) link_handle; + + // Check for overflow + if (offset > (offset + size)) + return -EINVAL; + + mutex_lock(&link->lpc_mem_lock); + link->lpc_mem_sz = max(link->lpc_mem_sz, offset + size); + + mutex_unlock(&link->lpc_mem_lock); + + return 0; +} + +u64 ocxl_link_lpc_map(void *link_handle, struct pci_dev *pdev) +{ + struct ocxl_link *link = (struct ocxl_link *) link_handle; + u64 lpc_mem; + + mutex_lock(&link->lpc_mem_lock); + if (link->lpc_mem) { + lpc_mem = link->lpc_mem; + + link->lpc_consumers++; + mutex_unlock(&link->lpc_mem_lock); + return lpc_mem; + } + + link->lpc_mem = pnv_ocxl_platform_lpc_setup(pdev, link->lpc_mem_sz); + if (link->lpc_mem) + link->lpc_consumers++; + lpc_mem = link->lpc_mem; + mutex_unlock(&link->lpc_mem_lock); + + return lpc_mem; +} + +void ocxl_link_lpc_release(void *link_handle, struct pci_dev *pdev) +{ + struct ocxl_link *link = (struct ocxl_link *) link_handle; + + mutex_lock(&link->lpc_mem_lock); + link->lpc_consumers--; + if (link->lpc_consumers == 0) { + pnv_ocxl_platform_lpc_release(pdev); + link->lpc_mem = 0; + } + + mutex_unlock(&link->lpc_mem_lock); +} diff --git a/drivers/misc/ocxl/ocxl_internal.h b/drivers/misc/ocxl/ocxl_internal.h index 97415afd79f3..20b417e00949 100644 --- a/drivers/misc/ocxl/ocxl_internal.h +++ b/drivers/misc/ocxl/ocxl_internal.h @@ -141,4 +141,37 @@ int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset); u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id); void ocxl_afu_irq_free_all(struct ocxl_context *ctx); +/** + * ocxl_link_add_lpc_mem() - Increment the amount of memory required by an OpenCAPI link + * + * @link_handle: The OpenCAPI link handle + * @offset: The offset of the memory to add + * @size: The amount of memory to increment by + * + * Return 0 on success, negative on overflow + */ +int ocxl_link_add_lpc_mem(void *link_handle, u64 offset, u64 size); + +/** + * ocxl_link_lpc_map() - Map the LPC memory for an OpenCAPI device + * + * Since LPC memory belongs to a link, the whole LPC memory available + * on the link bust be mapped in order to make it accessible to a device. + * + * @link_handle: The OpenCAPI link handle + * @pdev: A device that is on the link + */ +u64 ocxl_link_lpc_map(void *link_handle, struct pci_dev *pdev); + +/** + * ocxl_link_lpc_release() - Release the LPC memory device for an OpenCAPI device + * + * Offlines LPC memory on an OpenCAPI link for a device. If this is the + * last device on the link to release the memory, unmap it from the link. + * + * @link_handle: The OpenCAPI link handle + * @pdev: A device that is on the link + */ +void ocxl_link_lpc_release(void *link_handle, struct pci_dev *pdev); + #endif /* _OCXL_INTERNAL_H_ */ -- 2.21.0