From patchwork Tue Jun 16 04:08:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xu Yilun X-Patchwork-Id: 11606383 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F06F360D for ; Tue, 16 Jun 2020 04:13:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E18A420776 for ; Tue, 16 Jun 2020 04:13:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726979AbgFPENP (ORCPT ); Tue, 16 Jun 2020 00:13:15 -0400 Received: from mga14.intel.com ([192.55.52.115]:64734 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726926AbgFPENO (ORCPT ); Tue, 16 Jun 2020 00:13:14 -0400 IronPort-SDR: RnN0iDFF+cY28CsyzSw+1SftTq2MHLLy66UrkdO0WYSzUHtHPMl4n2H58RTb+SAoCkFuE6I0zT NX9+OtGMRNmw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jun 2020 21:13:14 -0700 IronPort-SDR: Sa2R73IS03mbJtXx9sgWuOPJuZGMmHNfIfSN6Pel4s8rcmcFlJ6dZsbxMG6BCDM2DomGY5qzxG qANUPIa4Dycg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,517,1583222400"; d="scan'208";a="261298581" Received: from yilunxu-optiplex-7050.sh.intel.com ([10.239.159.141]) by fmsmga007.fm.intel.com with ESMTP; 15 Jun 2020 21:13:11 -0700 From: Xu Yilun To: mdf@kernel.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Cc: trix@redhat.com, bhu@redhat.com, mtosatti@redhat.com, gregkh@linuxfoundation.org, Xu Yilun , Luwei Kang , Wu Hao Subject: [PATCH v7 7/7] Documentation: fpga: dfl: add descriptions for interrupt related interfaces. Date: Tue, 16 Jun 2020 12:08:48 +0800 Message-Id: <1592280528-6350-8-git-send-email-yilun.xu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1592280528-6350-1-git-send-email-yilun.xu@intel.com> References: <1592280528-6350-1-git-send-email-yilun.xu@intel.com> Sender: linux-fpga-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org This patch adds introductions of interrupt related interfaces for FME error reporting, port error reporting and AFU user interrupts features. Signed-off-by: Luwei Kang Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Reviewed-by: Marcelo Tosatti Acked-by: Wu Hao --- v2: Update Documents cause change of irq ioctl interfaces. v3: No change v4: Update interrupt support part. v5: No change v6: No change v7: No change --- Documentation/fpga/dfl.rst | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/Documentation/fpga/dfl.rst b/Documentation/fpga/dfl.rst index 978c4af..2df9a0a 100644 --- a/Documentation/fpga/dfl.rst +++ b/Documentation/fpga/dfl.rst @@ -89,6 +89,8 @@ The following functions are exposed through ioctls: - Program bitstream (DFL_FPGA_FME_PORT_PR) - Assign port to PF (DFL_FPGA_FME_PORT_ASSIGN) - Release port from PF (DFL_FPGA_FME_PORT_RELEASE) +- Get number of irqs of FME global error (DFL_FPGA_FME_ERR_GET_IRQ_NUM) +- Set interrupt trigger for FME error (DFL_FPGA_FME_ERR_SET_IRQ) More functions are exposed through sysfs (/sys/class/fpga_region/regionX/dfl-fme.n/): @@ -149,6 +151,10 @@ The following functions are exposed through ioctls: - Map DMA buffer (DFL_FPGA_PORT_DMA_MAP) - Unmap DMA buffer (DFL_FPGA_PORT_DMA_UNMAP) - Reset AFU (DFL_FPGA_PORT_RESET) +- Get number of irqs of port error (DFL_FPGA_PORT_ERR_GET_IRQ_NUM) +- Set interrupt trigger for port error (DFL_FPGA_PORT_ERR_SET_IRQ) +- Get number of irqs of UINT (DFL_FPGA_PORT_UINT_GET_IRQ_NUM) +- Set interrupt trigger for UINT (DFL_FPGA_PORT_UINT_SET_IRQ) DFL_FPGA_PORT_RESET: reset the FPGA Port and its AFU. Userspace can do Port @@ -462,6 +468,19 @@ since they are system-wide counters on FPGA device. The current driver does not support sampling. So "perf record" is unsupported. +Interrupt support +================= +Some FME and AFU private features are able to generate interrupts. As mentioned +above, users could call ioctl (DFL_FPGA_*_GET_IRQ_NUM) to know whether or how +many interrupts are supported for this private feature. Drivers also implement +an eventfd based interrupt handling mechanism for users to get notified when +interrupt happens. Users could set eventfds to driver via +ioctl (DFL_FPGA_*_SET_IRQ), and then poll/select on these eventfds waiting for +notification. +In Current DFL, 3 sub features (Port error, FME global error and AFU interrupt) +support interrupts. + + Add new FIUs support ==================== It's possible that developers made some new function blocks (FIUs) under this