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GET /api/1.0/patches/2175335/?format=api
{ "id": 2175335, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2175335/?format=api", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.0/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20251217151609.3162665-8-den@valinux.co.jp>", "date": "2025-12-17T15:15:41", "name": "[RFC,v3,07/35] PCI: endpoint: pci-epf-vntb: Hint subrange mapping preference to EPC driver", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "960d38e217d5729ea2fdece6c5653ac4d6517275", "submitter": { "id": 91573, "url": "http://patchwork.ozlabs.org/api/1.0/people/91573/?format=api", "name": "Koichiro Den", "email": "den@valinux.co.jp" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20251217151609.3162665-8-den@valinux.co.jp/mbox/", "series": [ { "id": 485709, "url": "http://patchwork.ozlabs.org/api/1.0/series/485709/?format=api", "date": "2025-12-17T15:15:53", "name": "NTB transport backed by endpoint DW eDMA", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/485709/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2175335/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-pci+bounces-43236-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=valinux.co.jp header.i=@valinux.co.jp\n header.a=rsa-sha256 header.s=selector1 header.b=O3yGNi/V;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n 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dkim=pass header.d=valinux.co.jp; arc=none" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=valinux.co.jp;\n s=selector1;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=tg0IjAjKuPqKUYfu402JjSwcRuXZ0WNpRg8vBf5Vtqc=;\n b=O3yGNi/Vh/OMQe7e4/12CV1uWxEo50SMErkFc5YJ4lTYbnSzmDfFjv8WAa2vn3Bu7mAdF1UtF3Yz6F5muo8knNNaiNUVgmymHDk3lv3LJ7XIhv+aVaW5gMCoPNkSfrGqGnaGIXncV9l4/DKsxs92vB4EqWyWnarY0o8aZgbGMho=", "From": "Koichiro Den <den@valinux.co.jp>", "To": "Frank.Li@nxp.com,\n\tdave.jiang@intel.com,\n\tntb@lists.linux.dev,\n\tlinux-pci@vger.kernel.org,\n\tdmaengine@vger.kernel.org,\n\tlinux-renesas-soc@vger.kernel.org,\n\tnetdev@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org", "Cc": "mani@kernel.org,\n\tkwilczynski@kernel.org,\n\tkishon@kernel.org,\n\tbhelgaas@google.com,\n\tcorbet@lwn.net,\n\tgeert+renesas@glider.be,\n\tmagnus.damm@gmail.com,\n\trobh@kernel.org,\n\tkrzk+dt@kernel.org,\n\tconor+dt@kernel.org,\n\tvkoul@kernel.org,\n\tjoro@8bytes.org,\n\twill@kernel.org,\n\trobin.murphy@arm.com,\n\tjdmason@kudzu.us,\n\tallenbh@gmail.com,\n\tandrew+netdev@lunn.ch,\n\tdavem@davemloft.net,\n\tedumazet@google.com,\n\tkuba@kernel.org,\n\tpabeni@redhat.com,\n\tBasavaraj.Natikar@amd.com,\n\tShyam-sundar.S-k@amd.com,\n\tkurt.schwemmer@microsemi.com,\n\tlogang@deltatee.com,\n\tjingoohan1@gmail.com,\n\tlpieralisi@kernel.org,\n\tutkarsh02t@gmail.com,\n\tjbrunet@baylibre.com,\n\tdlemoal@kernel.org,\n\tarnd@arndb.de,\n\telfring@users.sourceforge.net,\n\tden@valinux.co.jp", "Subject": "[RFC PATCH v3 07/35] PCI: endpoint: pci-epf-vntb: Hint subrange\n mapping preference to EPC driver", "Date": "Thu, 18 Dec 2025 00:15:41 +0900", "Message-ID": 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", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n b7d0a198-4c89-47a4-182c-08de3d7f3b20", "X-MS-Exchange-CrossTenant-AuthSource": "TYWP286MB2697.JPNP286.PROD.OUTLOOK.COM", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "17 Dec 2025 15:16:19.5985\n (UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "7a57bee8-f73d-4c5f-a4f7-d72c91c8c111", "X-MS-Exchange-CrossTenant-MailboxType": "HOSTED", "X-MS-Exchange-CrossTenant-UserPrincipalName": "\n iPSysmBAgdngsRbMoQ4QKdFE4RonmWAMMt7n8Q3uGO4qTonnt4dFfXE4iUREzw2FvRddPTYGYwXb+DqypQkMdg==", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "OS9P286MB4633", "X-OriginatorOrg": "valinux.co.jp" }, "content": "Now that pci_epc_set_bar supports subrange mapping, give a hint about\nthat when calling pci_epc_set_bar(). For example, DW EPC chooses Address\nMatch Mode IB iATU mapping when 'use_submap' is set to true.\n\nSigned-off-by: Koichiro Den <den@valinux.co.jp>\n---\n drivers/pci/endpoint/functions/pci-epf-vntb.c | 30 ++++++++++++++++++-\n 1 file changed, 29 insertions(+), 1 deletion(-)", "diff": "diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c\nindex 337995e2f3ce..23bbcfd20c3b 100644\n--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c\n+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c\n@@ -731,6 +731,12 @@ static int epf_ntb_mw_bar_init(struct epf_ntb *ntb)\n \t\t\t\tPCI_BASE_ADDRESS_MEM_TYPE_64 :\n \t\t\t\tPCI_BASE_ADDRESS_MEM_TYPE_32;\n \n+\t\t/* express preference for subrange mapping */\n+\t\tntb->epf->bar[barno].use_submap = true;\n+\t\tntb->epf->bar[barno].num_submap = 0;\n+\t\tif (WARN_ON(ntb->epf->bar[barno].submap))\n+\t\t\tdev_warn(dev, \"BAR%u submap is not NULL\\n\", barno);\n+\n \t\tret = pci_epc_set_bar(ntb->epf->epc,\n \t\t\t\t ntb->epf->func_no,\n \t\t\t\t ntb->epf->vfunc_no,\n@@ -1391,6 +1397,7 @@ static int vntb_epf_mw_set_trans(struct ntb_dev *ndev, int pidx, int idx,\n \tenum pci_barno barno;\n \tint ret;\n \tstruct device *dev;\n+\tunsigned int sb;\n \n \tdev = &ntb->ntb.dev;\n \tbarno = ntb->epf_ntb_bar[BAR_MW1 + idx];\n@@ -1399,7 +1406,28 @@ static int vntb_epf_mw_set_trans(struct ntb_dev *ndev, int pidx, int idx,\n \tepf_bar->barno = barno;\n \tepf_bar->size = size;\n \n-\tret = pci_epc_set_bar(ntb->epf->epc, 0, 0, epf_bar);\n+\t/* express preference for subrange mapping */\n+\tepf_bar->use_submap = true;\n+\tfor (sb = 0; sb < epf_bar->num_submap; sb++) {\n+\t\tif (epf_bar->submap[sb].offset == offset) {\n+\t\t\tdev_warn(dev, \"offset 0x%llx is already mapped\\n\",\n+\t\t\t\t offset);\n+\t\t\treturn -EBUSY;\n+\t\t}\n+\t}\n+\tepf_bar->num_submap++;\n+\tepf_bar->submap = devm_krealloc_array(\n+\t\t\t\t&ntb->epf->dev, epf_bar->submap,\n+\t\t\t\tepf_bar->num_submap, sizeof(*epf_bar->submap),\n+\t\t\t\tGFP_KERNEL);\n+\tif (!epf_bar->submap)\n+\t\treturn -ENOMEM;\n+\tepf_bar->submap[sb].phys_addr = addr;\n+\tepf_bar->submap[sb].size = size;\n+\tepf_bar->submap[sb].offset = offset;\n+\n+\tret = pci_epc_set_bar(ntb->epf->epc, ntb->epf->func_no,\n+\t\t\t ntb->epf->vfunc_no, epf_bar);\n \tif (ret) {\n \t\tdev_err(dev, \"failure set mw trans\\n\");\n \t\treturn ret;\n", "prefixes": [ "RFC", "v3", "07/35" ] }