From patchwork Thu Sep 25 03:14:22 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yijing Wang X-Patchwork-Id: 4972741 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 2F176BEEA6 for ; Thu, 25 Sep 2014 03:05:03 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5214E20125 for ; Thu, 25 Sep 2014 03:05:02 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 591102010F for ; Thu, 25 Sep 2014 03:05:01 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XWzKo-0006xg-KR; Thu, 25 Sep 2014 03:03:10 +0000 Received: from szxga02-in.huawei.com ([119.145.14.65]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XWzKk-0006V2-8d for linux-arm-kernel@lists.infradead.org; Thu, 25 Sep 2014 03:03:07 +0000 Received: from 172.24.2.119 (EHLO szxeml409-hub.china.huawei.com) ([172.24.2.119]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BZX30384; Thu, 25 Sep 2014 10:50:48 +0800 (CST) Received: from localhost.localdomain (10.175.100.166) by szxeml409-hub.china.huawei.com (10.82.67.136) with Microsoft SMTP Server id 14.3.158.1; Thu, 25 Sep 2014 10:50:36 +0800 From: Yijing Wang To: Bjorn Helgaas Subject: [PATCH v2 12/22] MIPS/Octeon/MSI: Use MSI chip framework to configure MSI/MSI-X irq Date: Thu, 25 Sep 2014 11:14:22 +0800 Message-ID: <1411614872-4009-13-git-send-email-wangyijing@huawei.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1411614872-4009-1-git-send-email-wangyijing@huawei.com> References: <1411614872-4009-1-git-send-email-wangyijing@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.100.166] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140924_200306_658624_B07FD6D4 X-CRM114-Status: GOOD ( 15.20 ) X-Spam-Score: -1.4 (-) Cc: linux-mips@linux-mips.org, linux-ia64@vger.kernel.org, linux-pci@vger.kernel.org, Bharat.Bhushan@freescale.com, Yijing Wang , Thierry Reding , sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Russell King , Michael Ellerman , Joerg Roedel , x86@kernel.org, Sebastian Ott , Benjamin Herrenschmidt , xen-devel@lists.xenproject.org, arnab.basu@freescale.com, Arnd Bergmann , Konrad Rzeszutek Wilk , Chris Metcalf , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Thomas Petazzoni , Xinwei Hu , Tony Luck , Sergei Shtylyov , linux-kernel@vger.kernel.org, Ralf Baechle , iommu@lists.linux-foundation.org, David Vrabel , Wuyun , linuxppc-dev@lists.ozlabs.org, "David S. Miller" , Lucas Stach X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 Use MSI chip framework instead of arch MSI functions to configure MSI/MSI-X irq. So we can manage MSI/MSI-X irq in a unified framework. Signed-off-by: Yijing Wang --- arch/mips/pci/msi-octeon.c | 35 ++++++++++++++++++++++------------- 1 files changed, 22 insertions(+), 13 deletions(-) diff --git a/arch/mips/pci/msi-octeon.c b/arch/mips/pci/msi-octeon.c index 63bbe07..14f2d16 100644 --- a/arch/mips/pci/msi-octeon.c +++ b/arch/mips/pci/msi-octeon.c @@ -57,7 +57,7 @@ static int msi_irq_size; * * Returns 0 on success. */ -int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) +static int octeon_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) { struct msi_msg msg; u16 control; @@ -132,12 +132,12 @@ msi_irq_allocated: /* Make sure the search for available interrupts didn't fail */ if (irq >= 64) { if (request_private_bits) { - pr_err("arch_setup_msi_irq: Unable to find %d free interrupts, trying just one", + pr_err("octeon_setup_msi_irq: Unable to find %d free interrupts, trying just one", 1 << request_private_bits); request_private_bits = 0; goto try_only_one; } else - panic("arch_setup_msi_irq: Unable to find a free MSI interrupt"); + panic("octeon_setup_msi_irq: Unable to find a free MSI interrupt"); } /* MSI interrupts start at logical IRQ OCTEON_IRQ_MSI_BIT0 */ @@ -168,7 +168,7 @@ msi_irq_allocated: msg.address_hi = (0 + CVMX_SLI_PCIE_MSI_RCV) >> 32; break; default: - panic("arch_setup_msi_irq: Invalid octeon_dma_bar_type"); + panic("octeon_setup_msi_irq: Invalid octeon_dma_bar_type"); } msg.data = irq - OCTEON_IRQ_MSI_BIT0; @@ -182,7 +182,7 @@ msi_irq_allocated: return 0; } -int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) +static int octeon_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) { struct msi_desc *entry; int ret; @@ -201,7 +201,7 @@ int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) return 1; list_for_each_entry(entry, &dev->msi_list, list) { - ret = arch_setup_msi_irq(dev, entry); + ret = octeon_setup_msi_irq(dev, entry); if (ret < 0) return ret; if (ret > 0) @@ -210,14 +210,13 @@ int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) return 0; } - /** * Called when a device no longer needs its MSI interrupts. All * MSI interrupts for the device are freed. * * @irq: The devices first irq number. There may be multple in sequence. */ -void arch_teardown_msi_irq(unsigned int irq) +static void octeon_teardown_msi_irq(unsigned int irq) { int number_irqs; u64 bitmask; @@ -226,8 +225,8 @@ void arch_teardown_msi_irq(unsigned int irq) if ((irq < OCTEON_IRQ_MSI_BIT0) || (irq > msi_irq_size + OCTEON_IRQ_MSI_BIT0)) - panic("arch_teardown_msi_irq: Attempted to teardown illegal " - "MSI interrupt (%d)", irq); + panic("octeon_teardown_msi_irq: Attempted to teardown illegal " + "MSI interrupt (%d)", irq); irq -= OCTEON_IRQ_MSI_BIT0; index = irq / 64; @@ -240,7 +239,7 @@ void arch_teardown_msi_irq(unsigned int irq) */ number_irqs = 0; while ((irq0 + number_irqs < 64) && - (msi_multiple_irq_bitmask[index] + (msi_multiple_irq_bitmask[index] & (1ull << (irq0 + number_irqs)))) number_irqs++; number_irqs++; @@ -249,8 +248,8 @@ void arch_teardown_msi_irq(unsigned int irq) /* Shift the mask to the correct bit location */ bitmask <<= irq0; if ((msi_free_irq_bitmask[index] & bitmask) != bitmask) - panic("arch_teardown_msi_irq: Attempted to teardown MSI " - "interrupt (%d) not in use", irq); + panic("octeon_teardown_msi_irq: Attempted to teardown MSI " + "interrupt (%d) not in use", irq); /* Checks are done, update the in use bitmask */ spin_lock(&msi_free_irq_bitmask_lock); @@ -259,6 +258,16 @@ void arch_teardown_msi_irq(unsigned int irq) spin_unlock(&msi_free_irq_bitmask_lock); } +static struct msi_chip octeon_msi_chip = { + .setup_irqs = octeon_setup_msi_irqs, + .teardown_irq = octeon_teardown_msi_irq, +}; + +struct msi_chip *arch_find_msi_chip(struct pci_dev *dev) +{ + return &octeon_msi_chip; +} + static DEFINE_RAW_SPINLOCK(octeon_irq_msi_lock); static u64 msi_rcv_reg[4];