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GET /api/patches/806960/?format=api
{ "id": 806960, "url": "http://patchwork.ozlabs.org/api/patches/806960/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1503987820-31933-7-git-send-email-sukadev@linux.vnet.ibm.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "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": "<1503987820-31933-7-git-send-email-sukadev@linux.vnet.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/1503987820-31933-7-git-send-email-sukadev@linux.vnet.ibm.com/", "date": "2017-08-29T06:23:36", "name": "[v8,06/10] powerpc/vas: Define helpers to alloc/free windows", "commit_ref": "bbfe59f8a7057f80f67a74e77fb4e941240e90b9", "pull_url": null, "state": "accepted", "archived": false, "hash": "a1f0b5537be22d37ec01806b4a61be22062f9fe5", "submitter": { "id": 984, "url": "http://patchwork.ozlabs.org/api/people/984/?format=api", "name": "Sukadev Bhattiprolu", "email": "sukadev@linux.vnet.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1503987820-31933-7-git-send-email-sukadev@linux.vnet.ibm.com/mbox/", "series": [ { "id": 310, "url": "http://patchwork.ozlabs.org/api/series/310/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=310", "date": "2017-08-29T06:23:30", "name": "Enable VAS", "version": 8, "mbox": "http://patchwork.ozlabs.org/series/310/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/806960/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/806960/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>", "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 [IPv6:2401:3900:2:1::3])\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 3xhJlS0Njjz9t2x\n\tfor <patchwork-incoming@ozlabs.org>;\n\tTue, 29 Aug 2017 16:34:44 +1000 (AEST)", "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xhJlR6fwRzDr0K\n\tfor <patchwork-incoming@ozlabs.org>;\n\tTue, 29 Aug 2017 16:34:43 +1000 (AEST)", "from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2])\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 3xhJWF0PsWzDqV5\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tTue, 29 Aug 2017 16:24:09 +1000 (AEST)", "from ozlabs.org (bilbo.ozlabs.org [103.22.144.67])\n\tby bilbo.ozlabs.org (Postfix) with ESMTP id 3xhJWD5Kp6z8vmR\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tTue, 29 Aug 2017 16:24:08 +1000 (AEST)", "by ozlabs.org (Postfix)\n\tid 3xhJWD3B6Lz9t3J; Tue, 29 Aug 2017 16:24:08 +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 3xhJWC25xLz9t3t\n\tfor <linuxppc-dev@ozlabs.org>; Tue, 29 Aug 2017 16:24:07 +1000 (AEST)", "from pps.filterd (m0098420.ppops.net [127.0.0.1])\n\tby mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id\n\tv7T6NY8a014208\n\tfor <linuxppc-dev@ozlabs.org>; Tue, 29 Aug 2017 02:24:04 -0400", "from e17.ny.us.ibm.com (e17.ny.us.ibm.com [129.33.205.207])\n\tby mx0b-001b2d01.pphosted.com with ESMTP id 2cmx9uj400-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor <linuxppc-dev@ozlabs.org>; Tue, 29 Aug 2017 02:24:04 -0400", "from localhost\n\tby e17.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! Violators will be prosecuted\n\tfor <linuxppc-dev@ozlabs.org> from <sukadev@linux.vnet.ibm.com>;\n\tTue, 29 Aug 2017 02:24:04 -0400", "from b01cxnp22035.gho.pok.ibm.com (9.57.198.25)\n\tby e17.ny.us.ibm.com (146.89.104.204) with IBM ESMTP SMTP Gateway:\n\tAuthorized Use Only! Violators will be prosecuted; \n\tTue, 29 Aug 2017 02:24:00 -0400", "from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com\n\t[9.57.199.110])\n\tby b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP\n\tid v7T6NwXU33095826; Tue, 29 Aug 2017 06:23:59 GMT", "from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id 600FAAE03B;\n\tTue, 29 Aug 2017 02:24:23 -0400 (EDT)", "from suka-w540.usor.ibm.com (unknown [9.70.94.25])\n\tby b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP id 86315AE034;\n\tTue, 29 Aug 2017 02:24:22 -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=<UNKNOWN>)", "From": "Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>", "To": "Michael Ellerman <mpe@ellerman.id.au>", "Subject": "[PATCH v8 06/10] powerpc/vas: Define helpers to alloc/free windows", "Date": "Mon, 28 Aug 2017 23:23:36 -0700", "X-Mailer": "git-send-email 2.7.4", "In-Reply-To": "<1503987820-31933-1-git-send-email-sukadev@linux.vnet.ibm.com>", "References": "<1503987820-31933-1-git-send-email-sukadev@linux.vnet.ibm.com>", "X-TM-AS-GCONF": "00", "x-cbid": "17082906-0040-0000-0000-00000396FE4B", "X-IBM-SpamModules-Scores": "", "X-IBM-SpamModules-Versions": "BY=3.00007631; HX=3.00000241; KW=3.00000007;\n\tPH=3.00000004; SC=3.00000226; SDB=6.00909146; UDB=6.00455922;\n\tIPR=6.00689402; \n\tBA=6.00005559; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009;\n\tZB=6.00000000; \n\tZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00016912;\n\tXFM=3.00000015; UTC=2017-08-29 06:24:02", "X-IBM-AV-DETECTION": "SAVI=unused REMOTE=unused XFE=unused", "x-cbparentid": "17082906-0041-0000-0000-0000078B2FD2", "Message-Id": "<1503987820-31933-7-git-send-email-sukadev@linux.vnet.ibm.com>", "X-Proofpoint-Virus-Version": "vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-08-29_01:, , signatures=0", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n\tspamscore=0 suspectscore=2\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-1708290094", "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<linuxppc-dev.lists.ozlabs.org>", "List-Unsubscribe": "<https://lists.ozlabs.org/options/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>", "List-Archive": "<http://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>", "List-Subscribe": "<https://lists.ozlabs.org/listinfo/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>", "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<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>" }, "content": "Define helpers to allocate/free VAS window objects. These will\nbe used in follow-on patches when opening/closing windows.\n\nChangelog[v8]:\n\t- [Michael Ellerman] Make some functions static; retry if\n\t ida_get_new() fails with EAGAIN; fix a couple of leak in ids\n\nSigned-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>\n---\n arch/powerpc/platforms/powernv/vas-window.c | 73 +++++++++++++++++++++++++++++\n 1 file changed, 73 insertions(+)", "diff": "diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c\nindex 68dfe53..bfc9dba 100644\n--- a/arch/powerpc/platforms/powernv/vas-window.c\n+++ b/arch/powerpc/platforms/powernv/vas-window.c\n@@ -485,6 +485,79 @@ int init_winctx_regs(struct vas_window *window, struct vas_winctx *winctx)\n \treturn 0;\n }\n \n+static DEFINE_SPINLOCK(vas_ida_lock);\n+\n+static void vas_release_window_id(struct ida *ida, int winid)\n+{\n+\tspin_lock(&vas_ida_lock);\n+\tida_remove(ida, winid);\n+\tspin_unlock(&vas_ida_lock);\n+}\n+\n+static int vas_assign_window_id(struct ida *ida)\n+{\n+\tint rc, winid;\n+\n+\tdo {\n+\t\trc = ida_pre_get(ida, GFP_KERNEL);\n+\t\tif (!rc)\n+\t\t\treturn -EAGAIN;\n+\n+\t\tspin_lock(&vas_ida_lock);\n+\t\trc = ida_get_new(ida, &winid);\n+\t\tspin_unlock(&vas_ida_lock);\n+\t} while (rc == -EAGAIN);\n+\n+\tif (rc)\n+\t\treturn rc;\n+\n+\tif (winid > VAS_WINDOWS_PER_CHIP) {\n+\t\tpr_err(\"Too many (%d) open windows\\n\", winid);\n+\t\tvas_release_window_id(ida, winid);\n+\t\treturn -EAGAIN;\n+\t}\n+\n+\treturn winid;\n+}\n+\n+void vas_window_free(struct vas_window *window)\n+{\n+\tint winid = window->winid;\n+\tstruct vas_instance *vinst = window->vinst;\n+\n+\tunmap_winctx_mmio_bars(window);\n+\tkfree(window);\n+\n+\tvas_release_window_id(&vinst->ida, winid);\n+}\n+\n+struct vas_window *vas_window_alloc(struct vas_instance *vinst)\n+{\n+\tint winid;\n+\tstruct vas_window *window;\n+\n+\twinid = vas_assign_window_id(&vinst->ida);\n+\tif (winid < 0)\n+\t\treturn ERR_PTR(winid);\n+\n+\twindow = kzalloc(sizeof(*window), GFP_KERNEL);\n+\tif (!window)\n+\t\tgoto out_free;\n+\n+\twindow->vinst = vinst;\n+\twindow->winid = winid;\n+\n+\tif (map_winctx_mmio_bars(window))\n+\t\tgoto out_free;\n+\n+\treturn window;\n+\n+out_free:\n+\tkfree(window);\n+\tvas_release_window_id(&vinst->ida, winid);\n+\treturn ERR_PTR(-ENOMEM);\n+}\n+\n /* stub for now */\n int vas_win_close(struct vas_window *window)\n {\n", "prefixes": [ "v8", "06/10" ] }