From patchwork Fri Mar 17 15:47:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathias Nyman X-Patchwork-Id: 664703 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 9F4EAC74A5B for ; Fri, 17 Mar 2023 15:46:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231293AbjCQPq2 (ORCPT ); Fri, 17 Mar 2023 11:46:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230031AbjCQPq1 (ORCPT ); Fri, 17 Mar 2023 11:46:27 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 851FBB5FF7 for ; Fri, 17 Mar 2023 08:46:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679067978; x=1710603978; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/Asbffi6CWrmPDY6KpwyliGzV7NpZETs5OHT7ahZVgw=; b=VXmzBbLv3Dza+I819OxrkSz5NJtjKs/mUSqjGOnzsDsbaBNwgpViRrHt SflF+woN5ggXtrX+W0RrOhm7D62DXN6v9SOcHmcg14BOezok+Lgbt97tV YKIdd8dLodZc7pBEHaScwCw2Yvj44UFiWtm6wAIdKATrYPgSMpQoSUSsu 6ew5KZrqTNF6Vi1LKC4ms8av86nc4NKSwvaeFCrEEutsLExnymGOLJiAo 38IAHDOMfsRV6QV4i1zUyAwEGBboiDsqbaBJzVgztnO3eWKe9ra5VPyRJ vBcv4/i18Nc1JgV9R7yaYP+Q1ZuX3M1tp2Hzim8Wb1w4u544OVUKSngbp Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10652"; a="338309856" X-IronPort-AV: E=Sophos;i="5.98,268,1673942400"; d="scan'208";a="338309856" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2023 08:46:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10652"; a="630312013" X-IronPort-AV: E=Sophos;i="5.98,268,1673942400"; d="scan'208";a="630312013" Received: from mattu-haswell.fi.intel.com ([10.237.72.199]) by orsmga003.jf.intel.com with ESMTP; 17 Mar 2023 08:46:16 -0700 From: Mathias Nyman To: Cc: , Josue David Hernandez Gutierrez , Mathias Nyman Subject: [PATCH 10/14] xhci: Move functions to setup msi to xhci-pci Date: Fri, 17 Mar 2023 17:47:11 +0200 Message-Id: <20230317154715.535523-11-mathias.nyman@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230317154715.535523-1-mathias.nyman@linux.intel.com> References: <20230317154715.535523-1-mathias.nyman@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Josue David Hernandez Gutierrez Move functions to setup msi from xhci.c to xhci-pci.c to decouple PCI specific code from generic xhci code. No functional changes, functions are an exact copy [commit message rewording -Mathias] Signed-off-by: Josue David Hernandez Gutierrez Signed-off-by: Mathias Nyman --- drivers/usb/host/xhci-pci.c | 129 ++++++++++++++++++++++++++++++++ drivers/usb/host/xhci-ring.c | 1 + drivers/usb/host/xhci-trace.c | 1 + drivers/usb/host/xhci.c | 134 ---------------------------------- drivers/usb/host/xhci.h | 1 - 5 files changed, 131 insertions(+), 135 deletions(-) diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 5f006d199cd6..2d56b7477fcd 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -88,6 +88,135 @@ static const struct xhci_driver_overrides xhci_pci_overrides __initconst = { .update_hub_device = xhci_pci_update_hub_device, }; +/* + * Set up MSI + */ +static int xhci_setup_msi(struct xhci_hcd *xhci) +{ + int ret; + /* + * TODO:Check with MSI Soc for sysdev + */ + struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); + + ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); + if (ret < 0) { + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "failed to allocate MSI entry"); + return ret; + } + + ret = request_irq(pdev->irq, xhci_msi_irq, + 0, "xhci_hcd", xhci_to_hcd(xhci)); + if (ret) { + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "disable MSI interrupt"); + pci_free_irq_vectors(pdev); + } + + return ret; +} + +/* + * Set up MSI-X + */ +static int xhci_setup_msix(struct xhci_hcd *xhci) +{ + int i, ret; + struct usb_hcd *hcd = xhci_to_hcd(xhci); + struct pci_dev *pdev = to_pci_dev(hcd->self.controller); + + /* + * calculate number of msi-x vectors supported. + * - HCS_MAX_INTRS: the max number of interrupts the host can handle, + * with max number of interrupters based on the xhci HCSPARAMS1. + * - num_online_cpus: maximum msi-x vectors per CPUs core. + * Add additional 1 vector to ensure always available interrupt. + */ + xhci->msix_count = min(num_online_cpus() + 1, + HCS_MAX_INTRS(xhci->hcs_params1)); + + ret = pci_alloc_irq_vectors(pdev, xhci->msix_count, xhci->msix_count, + PCI_IRQ_MSIX); + if (ret < 0) { + xhci_dbg_trace(xhci, trace_xhci_dbg_init, + "Failed to enable MSI-X"); + return ret; + } + + for (i = 0; i < xhci->msix_count; i++) { + ret = request_irq(pci_irq_vector(pdev, i), xhci_msi_irq, 0, + "xhci_hcd", xhci_to_hcd(xhci)); + if (ret) + goto disable_msix; + } + + hcd->msix_enabled = 1; + return ret; + +disable_msix: + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "disable MSI-X interrupt"); + while (--i >= 0) + free_irq(pci_irq_vector(pdev, i), xhci_to_hcd(xhci)); + pci_free_irq_vectors(pdev); + return ret; +} + +static int xhci_try_enable_msi(struct usb_hcd *hcd) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + struct pci_dev *pdev; + int ret; + + /* The xhci platform device has set up IRQs through usb_add_hcd. */ + if (xhci->quirks & XHCI_PLAT) + return 0; + + pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); + /* + * Some Fresco Logic host controllers advertise MSI, but fail to + * generate interrupts. Don't even try to enable MSI. + */ + if (xhci->quirks & XHCI_BROKEN_MSI) + goto legacy_irq; + + /* unregister the legacy interrupt */ + if (hcd->irq) + free_irq(hcd->irq, hcd); + hcd->irq = 0; + + ret = xhci_setup_msix(xhci); + if (ret) + /* fall back to msi*/ + ret = xhci_setup_msi(xhci); + + if (!ret) { + hcd->msi_enabled = 1; + return 0; + } + + if (!pdev->irq) { + xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n"); + return -EINVAL; + } + + legacy_irq: + if (!strlen(hcd->irq_descr)) + snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", + hcd->driver->description, hcd->self.busnum); + + /* fall back to legacy interrupt*/ + ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, + hcd->irq_descr, hcd); + if (ret) { + xhci_err(xhci, "request interrupt %d failed\n", + pdev->irq); + return ret; + } + hcd->irq = pdev->irq; + return 0; +} + static int xhci_pci_run(struct usb_hcd *hcd) { int ret; diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index eb788c60c1c0..1ad12d5a4857 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -3106,6 +3106,7 @@ irqreturn_t xhci_msi_irq(int irq, void *hcd) { return xhci_irq(hcd); } +EXPORT_SYMBOL_GPL(xhci_msi_irq); /**** Endpoint Ring Operations ****/ diff --git a/drivers/usb/host/xhci-trace.c b/drivers/usb/host/xhci-trace.c index d0070814d1ea..062662d23241 100644 --- a/drivers/usb/host/xhci-trace.c +++ b/drivers/usb/host/xhci-trace.c @@ -12,3 +12,4 @@ #include "xhci-trace.h" EXPORT_TRACEPOINT_SYMBOL_GPL(xhci_dbg_quirks); +EXPORT_TRACEPOINT_SYMBOL_GPL(xhci_dbg_init); diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index d08e2ba744f8..9be84e635e1b 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -319,79 +319,6 @@ static int xhci_disable_interrupter(struct xhci_interrupter *ir) } #ifdef CONFIG_USB_PCI -/* - * Set up MSI - */ -static int xhci_setup_msi(struct xhci_hcd *xhci) -{ - int ret; - /* - * TODO:Check with MSI Soc for sysdev - */ - struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); - - ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); - if (ret < 0) { - xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "failed to allocate MSI entry"); - return ret; - } - - ret = request_irq(pdev->irq, xhci_msi_irq, - 0, "xhci_hcd", xhci_to_hcd(xhci)); - if (ret) { - xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "disable MSI interrupt"); - pci_free_irq_vectors(pdev); - } - - return ret; -} - -/* - * Set up MSI-X - */ -static int xhci_setup_msix(struct xhci_hcd *xhci) -{ - int i, ret; - struct usb_hcd *hcd = xhci_to_hcd(xhci); - struct pci_dev *pdev = to_pci_dev(hcd->self.controller); - - /* - * calculate number of msi-x vectors supported. - * - HCS_MAX_INTRS: the max number of interrupts the host can handle, - * with max number of interrupters based on the xhci HCSPARAMS1. - * - num_online_cpus: maximum msi-x vectors per CPUs core. - * Add additional 1 vector to ensure always available interrupt. - */ - xhci->msix_count = min(num_online_cpus() + 1, - HCS_MAX_INTRS(xhci->hcs_params1)); - - ret = pci_alloc_irq_vectors(pdev, xhci->msix_count, xhci->msix_count, - PCI_IRQ_MSIX); - if (ret < 0) { - xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "Failed to enable MSI-X"); - return ret; - } - - for (i = 0; i < xhci->msix_count; i++) { - ret = request_irq(pci_irq_vector(pdev, i), xhci_msi_irq, 0, - "xhci_hcd", xhci_to_hcd(xhci)); - if (ret) - goto disable_msix; - } - - hcd->msix_enabled = 1; - return ret; - -disable_msix: - xhci_dbg_trace(xhci, trace_xhci_dbg_init, "disable MSI-X interrupt"); - while (--i >= 0) - free_irq(pci_irq_vector(pdev, i), xhci_to_hcd(xhci)); - pci_free_irq_vectors(pdev); - return ret; -} /* Free any IRQs and disable MSI-X */ static void xhci_cleanup_msix(struct xhci_hcd *xhci) @@ -432,69 +359,8 @@ static void __maybe_unused xhci_msix_sync_irqs(struct xhci_hcd *xhci) } } -int xhci_try_enable_msi(struct usb_hcd *hcd) -{ - struct xhci_hcd *xhci = hcd_to_xhci(hcd); - struct pci_dev *pdev; - int ret; - - /* The xhci platform device has set up IRQs through usb_add_hcd. */ - if (xhci->quirks & XHCI_PLAT) - return 0; - - pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); - /* - * Some Fresco Logic host controllers advertise MSI, but fail to - * generate interrupts. Don't even try to enable MSI. - */ - if (xhci->quirks & XHCI_BROKEN_MSI) - goto legacy_irq; - - /* unregister the legacy interrupt */ - if (hcd->irq) - free_irq(hcd->irq, hcd); - hcd->irq = 0; - - ret = xhci_setup_msix(xhci); - if (ret) - /* fall back to msi*/ - ret = xhci_setup_msi(xhci); - - if (!ret) { - hcd->msi_enabled = 1; - return 0; - } - - if (!pdev->irq) { - xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n"); - return -EINVAL; - } - - legacy_irq: - if (!strlen(hcd->irq_descr)) - snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", - hcd->driver->description, hcd->self.busnum); - - /* fall back to legacy interrupt*/ - ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, - hcd->irq_descr, hcd); - if (ret) { - xhci_err(xhci, "request interrupt %d failed\n", - pdev->irq); - return ret; - } - hcd->irq = pdev->irq; - return 0; -} -EXPORT_SYMBOL_GPL(xhci_try_enable_msi); - #else -static inline int xhci_try_enable_msi(struct usb_hcd *hcd) -{ - return 0; -} - static inline void xhci_cleanup_msix(struct xhci_hcd *xhci) { } diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 26fccc8d9055..786002bb35db 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -2143,7 +2143,6 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated); irqreturn_t xhci_irq(struct usb_hcd *hcd); irqreturn_t xhci_msi_irq(int irq, void *hcd); -int xhci_try_enable_msi(struct usb_hcd *hcd); int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev); int xhci_alloc_tt_info(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev,