From patchwork Fri Feb 10 20:25:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukas Wunner X-Patchwork-Id: 13136411 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E189AC05027 for ; Fri, 10 Feb 2023 20:47:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232979AbjBJUrP (ORCPT ); Fri, 10 Feb 2023 15:47:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232339AbjBJUrO (ORCPT ); Fri, 10 Feb 2023 15:47:14 -0500 Received: from mailout3.hostsharing.net (mailout3.hostsharing.net [IPv6:2a01:4f8:150:2161:1:b009:f236:0]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7E2C7DD31; Fri, 10 Feb 2023 12:47:12 -0800 (PST) Received: from h08.hostsharing.net (h08.hostsharing.net [IPv6:2a01:37:1000::53df:5f1c:0]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "*.hostsharing.net", Issuer "RapidSSL Global TLS RSA4096 SHA256 2022 CA1" (verified OK)) by mailout3.hostsharing.net (Postfix) with ESMTPS id 46B6710330AD1; Fri, 10 Feb 2023 21:47:11 +0100 (CET) Received: from localhost (unknown [89.246.108.87]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by h08.hostsharing.net (Postfix) with ESMTPSA id E6A7C600CA83; Fri, 10 Feb 2023 21:47:10 +0100 (CET) X-Mailbox-Line: From 00c86bd08682a61a1f210b7fb08bbc59ee1a0fe4 Mon Sep 17 00:00:00 2001 Message-Id: <00c86bd08682a61a1f210b7fb08bbc59ee1a0fe4.1676043318.git.lukas@wunner.de> In-Reply-To: References: From: Lukas Wunner Date: Fri, 10 Feb 2023 21:25:08 +0100 Subject: [PATCH v3 08/16] cxl/pci: Use synchronous API for DOE To: Bjorn Helgaas , linux-pci@vger.kernel.org Cc: Gregory Price , Ira Weiny , Jonathan Cameron , Dan Williams , Alison Schofield , Vishal Verma , Dave Jiang , "Li, Ming" , Hillf Danton , Ben Widawsky , linuxarm@huawei.com, linux-cxl@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org A synchronous API for DOE has just been introduced. Convert CXL CDAT retrieval over to it. Tested-by: Ira Weiny Signed-off-by: Lukas Wunner Reviewed-by: Ira Weiny Reviewed-by: Jonathan Cameron Cc: Dan Williams --- drivers/cxl/core/pci.c | 66 ++++++++++++++---------------------------- 1 file changed, 22 insertions(+), 44 deletions(-) diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c index c37c41d7acb6..09a9fa67d12a 100644 --- a/drivers/cxl/core/pci.c +++ b/drivers/cxl/core/pci.c @@ -487,51 +487,26 @@ static struct pci_doe_mb *find_cdat_doe(struct device *uport) CXL_DOE_TABLE_ACCESS_TABLE_TYPE_CDATA) | \ FIELD_PREP(CXL_DOE_TABLE_ACCESS_ENTRY_HANDLE, (entry_handle))) -static void cxl_doe_task_complete(struct pci_doe_task *task) -{ - complete(task->private); -} - -struct cdat_doe_task { - __le32 request_pl; - __le32 response_pl[32]; - struct completion c; - struct pci_doe_task task; -}; - -#define DECLARE_CDAT_DOE_TASK(req, cdt) \ -struct cdat_doe_task cdt = { \ - .c = COMPLETION_INITIALIZER_ONSTACK(cdt.c), \ - .request_pl = req, \ - .task = { \ - .prot.vid = PCI_DVSEC_VENDOR_ID_CXL, \ - .prot.type = CXL_DOE_PROTOCOL_TABLE_ACCESS, \ - .request_pl = &cdt.request_pl, \ - .request_pl_sz = sizeof(cdt.request_pl), \ - .response_pl = cdt.response_pl, \ - .response_pl_sz = sizeof(cdt.response_pl), \ - .complete = cxl_doe_task_complete, \ - .private = &cdt.c, \ - } \ -} - static int cxl_cdat_get_length(struct device *dev, struct pci_doe_mb *cdat_doe, size_t *length) { - DECLARE_CDAT_DOE_TASK(CDAT_DOE_REQ(0), t); + __le32 request = CDAT_DOE_REQ(0); + __le32 response[32]; int rc; - rc = pci_doe_submit_task(cdat_doe, &t.task); + rc = pci_doe(cdat_doe, PCI_DVSEC_VENDOR_ID_CXL, + CXL_DOE_PROTOCOL_TABLE_ACCESS, + &request, sizeof(request), + &response, sizeof(response)); if (rc < 0) { - dev_err(dev, "DOE submit failed: %d", rc); + dev_err(dev, "DOE failed: %d", rc); return rc; } - wait_for_completion(&t.c); - if (t.task.rv < 2 * sizeof(u32)) + if (rc < 2 * sizeof(u32)) return -EIO; - *length = le32_to_cpu(t.response_pl[1]); + *length = le32_to_cpu(response[1]); dev_dbg(dev, "CDAT length %zu\n", *length); return 0; @@ -546,31 +521,34 @@ static int cxl_cdat_read_table(struct device *dev, int entry_handle = 0; do { - DECLARE_CDAT_DOE_TASK(CDAT_DOE_REQ(entry_handle), t); + __le32 request = CDAT_DOE_REQ(entry_handle); struct cdat_entry_header *entry; + __le32 response[32]; size_t entry_dw; int rc; - rc = pci_doe_submit_task(cdat_doe, &t.task); + rc = pci_doe(cdat_doe, PCI_DVSEC_VENDOR_ID_CXL, + CXL_DOE_PROTOCOL_TABLE_ACCESS, + &request, sizeof(request), + &response, sizeof(response)); if (rc < 0) { - dev_err(dev, "DOE submit failed: %d", rc); + dev_err(dev, "DOE failed: %d", rc); return rc; } - wait_for_completion(&t.c); /* 1 DW Table Access Response Header + CDAT entry */ - entry = (struct cdat_entry_header *)(t.response_pl + 1); + entry = (struct cdat_entry_header *)(response + 1); if ((entry_handle == 0 && - t.task.rv != sizeof(u32) + sizeof(struct cdat_header)) || + rc != sizeof(u32) + sizeof(struct cdat_header)) || (entry_handle > 0 && - (t.task.rv < sizeof(u32) + sizeof(struct cdat_entry_header) || - t.task.rv != sizeof(u32) + le16_to_cpu(entry->length)))) + (rc < sizeof(u32) + sizeof(struct cdat_entry_header) || + rc != sizeof(u32) + le16_to_cpu(entry->length)))) return -EIO; /* Get the CXL table access header entry handle */ entry_handle = FIELD_GET(CXL_DOE_TABLE_ACCESS_ENTRY_HANDLE, - le32_to_cpu(t.response_pl[0])); - entry_dw = t.task.rv / sizeof(u32); + le32_to_cpu(response[0])); + entry_dw = rc / sizeof(u32); /* Skip Header */ entry_dw -= 1; entry_dw = min(length / sizeof(u32), entry_dw);