From patchwork Thu Jul 23 14:49:36 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 6853971 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A09A59F38B for ; Thu, 23 Jul 2015 14:49:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BA85D2074E for ; Thu, 23 Jul 2015 14:49:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9BEAF2077E for ; Thu, 23 Jul 2015 14:49:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753410AbbGWOtk (ORCPT ); Thu, 23 Jul 2015 10:49:40 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:52139 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753147AbbGWOtk (ORCPT ); Thu, 23 Jul 2015 10:49:40 -0400 Received: from dude.hi.4.pengutronix.de ([10.1.0.7] helo=dude.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1ZIFx1-0003Iz-6X; Thu, 23 Jul 2015 14:50:15 +0200 From: Lucas Stach To: Bjorn Helgaas , Jingoo Han , Pratyush Anand Cc: linux-pci@vger.kernel.org, patchwork-lst@pengutronix.de Subject: [PATCH v2 2/2] PCI: designware: implement multivector MSI irq setup Date: Thu, 23 Jul 2015 16:49:36 +0200 Message-Id: <1437662976-27188-2-git-send-email-l.stach@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1437662976-27188-1-git-send-email-l.stach@pengutronix.de> References: <1437662976-27188-1-git-send-email-l.stach@pengutronix.de> X-SA-Exim-Connect-IP: 10.1.0.7 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-pci@vger.kernel.org Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-8.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Allows to set up and use multiple MSI irqs per device. Signed-off-by: Lucas Stach --- The ifdef is needed to avoid a compile error on !CONFIG_PCI_MSI, as msi_list is only part of pci_dev when the kernel is compiled with MSI support. v2: move ifdeffery inside single function --- drivers/pci/host/pcie-designware.c | 43 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index 69486be7181e..52c600327805 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -286,6 +286,9 @@ static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos) } *pos = pos0; + desc->nvec_used = no_irqs; + desc->msi_attrib.multiple = order_base_2(no_irqs); + return irq; no_valid_irq: @@ -323,6 +326,45 @@ static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, return 0; } +static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev, + int nvec, int type) +{ +#ifdef CONFIG_PCI_MSI + int irq, pos; + struct msi_desc *desc; + struct msi_msg msg; + struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata); + + /* MSI-X interrupts are not supported */ + if (type == PCI_CAP_ID_MSIX) + return -EINVAL; + + WARN_ON(!list_is_singular(&pdev->msi_list)); + desc = list_entry(pdev->msi_list.next, struct msi_desc, list); + + irq = assign_irq(nvec, desc, &pos); + if (irq < 0) + return irq; + + if (pp->ops->get_msi_addr) + msg.address_lo = pp->ops->get_msi_addr(pp); + else + msg.address_lo = virt_to_phys((void *)pp->msi_data); + msg.address_hi = 0x0; + + if (pp->ops->get_msi_data) + msg.data = pp->ops->get_msi_data(pp, pos); + else + msg.data = pos; + + pci_write_msi_msg(irq, &msg); + + return 0; +#else + return -ENOSYS; +#endif +} + static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) { struct irq_data *data = irq_get_irq_data(irq); @@ -334,6 +376,7 @@ static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) static struct msi_controller dw_pcie_msi_chip = { .setup_irq = dw_msi_setup_irq, + .setup_irqs = dw_msi_setup_irqs, .teardown_irq = dw_msi_teardown_irq, };