From patchwork Tue Oct 13 21:35:21 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 7389141 Return-Path: X-Original-To: patchwork-intel-gfx@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 5E4E19F36A for ; Tue, 13 Oct 2015 21:35:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 61E2620800 for ; Tue, 13 Oct 2015 21:35:28 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 38F0F20807 for ; Tue, 13 Oct 2015 21:35:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C78C56E564; Tue, 13 Oct 2015 14:35:26 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id DF7756E564 for ; Tue, 13 Oct 2015 14:35:24 -0700 (PDT) Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by bombadil.infradead.org with esmtpsa (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zm7EC-0007FZ-6H; Tue, 13 Oct 2015 21:35:24 +0000 Message-ID: <1444772121.125804.66.camel@infradead.org> From: David Woodhouse To: iommu@lists.linux-foundation.org, intel-gfx@lists.freedesktop.org, Jesse Barnes Date: Tue, 13 Oct 2015 22:35:21 +0100 In-Reply-To: <1444771787.125804.50.camel@infradead.org> References: <1444771787.125804.50.camel@infradead.org> X-Mailer: Evolution 3.16.5 (3.16.5-3.fc22) Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Subject: [Intel-gfx] [PATCH v2 08/10] iommu/vt-d: Generalise DMAR MSI setup to allow for page request events X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 Signed-off-by: David Woodhouse --- drivers/iommu/dmar.c | 42 +++++++++++++++++++++++++++++++----------- include/linux/intel-iommu.h | 10 +++++++++- 2 files changed, 40 insertions(+), 12 deletions(-) diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 8757f8d..80e3c17 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1086,6 +1086,11 @@ static void free_iommu(struct intel_iommu *iommu) iommu_device_destroy(iommu->iommu_dev); if (iommu->irq) { + if (iommu->pr_irq) { + free_irq(iommu->pr_irq, iommu); + dmar_free_hwirq(iommu->pr_irq); + iommu->pr_irq = 0; + } free_irq(iommu->irq, iommu); dmar_free_hwirq(iommu->irq); iommu->irq = 0; @@ -1493,53 +1498,68 @@ static const char *dmar_get_fault_reason(u8 fault_reason, int *fault_type) } } + +static inline int dmar_msi_reg(struct intel_iommu *iommu, int irq) +{ + if (iommu->irq == irq) + return DMAR_FECTL_REG; + else if (iommu->pr_irq == irq) + return DMAR_PECTL_REG; + else + BUG(); +} + void dmar_msi_unmask(struct irq_data *data) { struct intel_iommu *iommu = irq_data_get_irq_handler_data(data); + int reg = dmar_msi_reg(iommu, data->irq); unsigned long flag; /* unmask it */ raw_spin_lock_irqsave(&iommu->register_lock, flag); - writel(0, iommu->reg + DMAR_FECTL_REG); + writel(0, iommu->reg + reg); /* Read a reg to force flush the post write */ - readl(iommu->reg + DMAR_FECTL_REG); + readl(iommu->reg + reg); raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } void dmar_msi_mask(struct irq_data *data) { - unsigned long flag; struct intel_iommu *iommu = irq_data_get_irq_handler_data(data); + int reg = dmar_msi_reg(iommu, data->irq); + unsigned long flag; /* mask it */ raw_spin_lock_irqsave(&iommu->register_lock, flag); - writel(DMA_FECTL_IM, iommu->reg + DMAR_FECTL_REG); + writel(DMA_FECTL_IM, iommu->reg + reg); /* Read a reg to force flush the post write */ - readl(iommu->reg + DMAR_FECTL_REG); + readl(iommu->reg + reg); raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } void dmar_msi_write(int irq, struct msi_msg *msg) { struct intel_iommu *iommu = irq_get_handler_data(irq); + int reg = dmar_msi_reg(iommu, irq); unsigned long flag; raw_spin_lock_irqsave(&iommu->register_lock, flag); - writel(msg->data, iommu->reg + DMAR_FEDATA_REG); - writel(msg->address_lo, iommu->reg + DMAR_FEADDR_REG); - writel(msg->address_hi, iommu->reg + DMAR_FEUADDR_REG); + writel(msg->data, iommu->reg + reg + 4); + writel(msg->address_lo, iommu->reg + reg + 8); + writel(msg->address_hi, iommu->reg + reg + 12); raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } void dmar_msi_read(int irq, struct msi_msg *msg) { struct intel_iommu *iommu = irq_get_handler_data(irq); + int reg = dmar_msi_reg(iommu, irq); unsigned long flag; raw_spin_lock_irqsave(&iommu->register_lock, flag); - msg->data = readl(iommu->reg + DMAR_FEDATA_REG); - msg->address_lo = readl(iommu->reg + DMAR_FEADDR_REG); - msg->address_hi = readl(iommu->reg + DMAR_FEUADDR_REG); + msg->data = readl(iommu->reg + reg + 4); + msg->address_lo = readl(iommu->reg + reg + 8); + msg->address_hi = readl(iommu->reg + reg + 12); raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 46add60..f16a2b9 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -60,6 +60,14 @@ #define DMAR_IQA_REG 0x90 /* Invalidation queue addr register */ #define DMAR_ICS_REG 0x9c /* Invalidation complete status register */ #define DMAR_IRTA_REG 0xb8 /* Interrupt remapping table addr register */ +#define DMAR_PQH_REG 0xc0 /* Page request queue head register */ +#define DMAR_PQT_REG 0xc8 /* Page request queue tail register */ +#define DMAR_PQA_REG 0xd0 /* Page request queue address register */ +#define DMAR_PRS_REG 0xdc /* Page request status register */ +#define DMAR_PECTL_REG 0xe0 /* Page request event control register */ +#define DMAR_PEDATA_REG 0xe4 /* Page request event interrupt data register */ +#define DMAR_PEADDR_REG 0xe8 /* Page request event interrupt addr register */ +#define DMAR_PEUADDR_REG 0xec /* Page request event Upper address register */ #define OFFSET_STRIDE (9) @@ -373,7 +381,7 @@ struct intel_iommu { int seq_id; /* sequence id of the iommu */ int agaw; /* agaw of this iommu */ int msagaw; /* max sagaw of this iommu */ - unsigned int irq; + unsigned int irq, pr_irq; u16 segment; /* PCI segment# */ unsigned char name[13]; /* Device Name */