{"id":805266,"url":"http://patchwork.ozlabs.org/api/1.2/patches/805266/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1503556688-15412-9-git-send-email-sukadev@linux.vnet.ibm.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.2/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<1503556688-15412-9-git-send-email-sukadev@linux.vnet.ibm.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/1503556688-15412-9-git-send-email-sukadev@linux.vnet.ibm.com/","date":"2017-08-24T06:38:04","name":"[v7,08/12] powerpc/vas: Define vas_win_id()","commit_ref":null,"pull_url":null,"state":"changes-requested","archived":false,"hash":"c2dbe7111fb8acef0c2cb1df8378cf8703430cd9","submitter":{"id":984,"url":"http://patchwork.ozlabs.org/api/1.2/people/984/?format=json","name":"Sukadev Bhattiprolu","email":"sukadev@linux.vnet.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1503556688-15412-9-git-send-email-sukadev@linux.vnet.ibm.com/mbox/","series":[],"comments":"http://patchwork.ozlabs.org/api/patches/805266/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/805266/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org","linuxppc-dev@ozlabs.org"],"Received":["from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xdFNK07Wxz9ryk\n\tfor ;\n\tThu, 24 Aug 2017 16:52:33 +1000 (AEST)","from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xdFNJ6L79zDrJv\n\tfor ;\n\tThu, 24 Aug 2017 16:52:32 +1000 (AEST)","from ozlabs.org (bilbo.ozlabs.org [103.22.144.67])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xdF4K41yqzDrK0\n\tfor ;\n\tThu, 24 Aug 2017 16:38:41 +1000 (AEST)","from ozlabs.org (bilbo.ozlabs.org [103.22.144.67])\n\tby bilbo.ozlabs.org (Postfix) with ESMTP id 3xdF4K222vz8w2V\n\tfor ;\n\tThu, 24 Aug 2017 16:38:41 +1000 (AEST)","by ozlabs.org (Postfix)\n\tid 3xdF4J6R8kz9t5C; Thu, 24 Aug 2017 16:38:40 +1000 (AEST)","from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com\n\t[148.163.158.5])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xdF4H64xqz9t2l\n\tfor ; Thu, 24 Aug 2017 16:38:39 +1000 (AEST)","from pps.filterd (m0098413.ppops.net [127.0.0.1])\n\tby mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id\n\tv7O6ZWwS094371\n\tfor ; Thu, 24 Aug 2017 02:38:36 -0400","from e18.ny.us.ibm.com (e18.ny.us.ibm.com [129.33.205.208])\n\tby mx0b-001b2d01.pphosted.com with ESMTP id 2chm6sqr0b-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor ; Thu, 24 Aug 2017 02:38:36 -0400","from localhost\n\tby e18.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! 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Violators will be prosecuted; \n\tThu, 24 Aug 2017 02:38:31 -0400","from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com\n\t[9.57.199.107])\n\tby b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP\n\tid v7O6cUTP26149024; Thu, 24 Aug 2017 06:38:30 GMT","from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id AE51812403D;\n\tThu, 24 Aug 2017 02:35:51 -0400 (EDT)","from suka-w540.usor.ibm.com (unknown [9.70.94.25])\n\tby b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP id D4B78124035;\n\tThu, 24 Aug 2017 02:35:50 -0400 (EDT)"],"Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com\n\t(client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com;\n\tenvelope-from=sukadev@linux.vnet.ibm.com; receiver=)","From":"Sukadev Bhattiprolu ","To":"Michael Ellerman ","Subject":"[PATCH v7 08/12] powerpc/vas: Define vas_win_id()","Date":"Wed, 23 Aug 2017 23:38:04 -0700","X-Mailer":"git-send-email 2.7.4","In-Reply-To":"<1503556688-15412-1-git-send-email-sukadev@linux.vnet.ibm.com>","References":"<1503556688-15412-1-git-send-email-sukadev@linux.vnet.ibm.com>","X-TM-AS-GCONF":"00","x-cbid":"17082406-0044-0000-0000-000003822BD1","X-IBM-SpamModules-Scores":"","X-IBM-SpamModules-Versions":"BY=3.00007601; HX=3.00000241; KW=3.00000007;\n\tPH=3.00000004; SC=3.00000224; SDB=6.00906836; UDB=6.00454554;\n\tIPR=6.00687033; \n\tBA=6.00005550; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009;\n\tZB=6.00000000; \n\tZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00016840;\n\tXFM=3.00000015; UTC=2017-08-24 06:38:34","X-IBM-AV-DETECTION":"SAVI=unused REMOTE=unused XFE=unused","x-cbparentid":"17082406-0045-0000-0000-000007B0437D","Message-Id":"<1503556688-15412-9-git-send-email-sukadev@linux.vnet.ibm.com>","X-Proofpoint-Virus-Version":"vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-08-24_03:, , signatures=0","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tspamscore=0 suspectscore=0\n\tmalwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam\n\tadjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000\n\tdefinitions=main-1708240106","X-BeenThere":"linuxppc-dev@lists.ozlabs.org","X-Mailman-Version":"2.1.23","Precedence":"list","List-Id":"Linux on PowerPC Developers Mail List\n\t","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"stewart@linux.vnet.ibm.com, mikey@neuling.org, linuxppc-dev@ozlabs.org, \n\tlinux-kernel@vger.kernel.org, apopple@au1.ibm.com, oohall@gmail.com","Errors-To":"linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org","Sender":"\"Linuxppc-dev\"\n\t"},"content":"Define an interface to return a system-wide unique id for a given VAS\nwindow.\n\nThe vas_win_id() will be used in a follow-on patch to generate an unique\nhandle for a user space receive window. Applications can use this handle\nto pair send and receive windows for fast thread-wakeup.\n\nThe hardware refers to this system-wide unique id as a Partition Send\nWindow ID which is expected to be used during fault handling. Hence the\n\"pswid\" in the function names.\n\nSigned-off-by: Sukadev Bhattiprolu \n---\n arch/powerpc/include/asm/vas.h | 5 +++++\n arch/powerpc/platforms/powernv/vas-window.c | 9 +++++++++\n arch/powerpc/platforms/powernv/vas.h | 28 ++++++++++++++++++++++++++++\n 3 files changed, 42 insertions(+)","diff":"diff --git a/arch/powerpc/include/asm/vas.h b/arch/powerpc/include/asm/vas.h\nindex 2f1c168..6c126f3 100644\n--- a/arch/powerpc/include/asm/vas.h\n+++ b/arch/powerpc/include/asm/vas.h\n@@ -53,6 +53,11 @@ enum vas_cop_type {\n };\n \n /*\n+ * Return a system-wide unique id for the VAS window @win.\n+ */\n+extern uint32_t vas_win_id(struct vas_window *win);\n+\n+/*\n * Return the power bus paste address associated with @win so the caller\n * can map that address into their address space.\n */\ndiff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c\nindex 3a4599f..42c1d4f 100644\n--- a/arch/powerpc/platforms/powernv/vas-window.c\n+++ b/arch/powerpc/platforms/powernv/vas-window.c\n@@ -575,3 +575,12 @@ int vas_win_close(struct vas_window *window)\n {\n \treturn -1;\n }\n+\n+/*\n+ * Return a system-wide unique window id for the window @win.\n+ */\n+uint32_t vas_win_id(struct vas_window *win)\n+{\n+\treturn encode_pswid(win->vinst->vas_id, win->winid);\n+}\n+EXPORT_SYMBOL_GPL(vas_win_id);\ndiff --git a/arch/powerpc/platforms/powernv/vas.h b/arch/powerpc/platforms/powernv/vas.h\nindex 7b2bcd0..3eadf90 100644\n--- a/arch/powerpc/platforms/powernv/vas.h\n+++ b/arch/powerpc/platforms/powernv/vas.h\n@@ -440,4 +440,32 @@ static inline uint64_t read_hvwc_reg(struct vas_window *win,\n \treturn in_be64(win->hvwc_map+reg);\n }\n \n+/*\n+ * Encode/decode the Partition Send Window ID (PSWID) for a window in\n+ * a way that we can uniquely identify any window in the system. i.e.\n+ * we should be able to locate the 'struct vas_window' given the PSWID.\n+ *\n+ *\tBits\tUsage\n+ *\t0:7\tVAS id (8 bits)\n+ *\t8:15\tUnused, 0 (3 bits)\n+ *\t16:31\tWindow id (16 bits)\n+ */\n+static inline u32 encode_pswid(int vasid, int winid)\n+{\n+\tu32 pswid = 0;\n+\n+\tpswid |= vasid << (31 - 7);\n+\tpswid |= winid;\n+\n+\treturn pswid;\n+}\n+\n+static inline void decode_pswid(u32 pswid, int *vasid, int *winid)\n+{\n+\tif (vasid)\n+\t\t*vasid = pswid >> (31 - 7) & 0xFF;\n+\n+\tif (winid)\n+\t\t*winid = pswid & 0xFFFF;\n+}\n #endif /* _VAS_H */\n","prefixes":["v7","08/12"]}