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259 lines
8.8 KiB
259 lines
8.8 KiB
From b0e74277164b17bb0d207ffe16056e13e558f6ba Mon Sep 17 00:00:00 2001
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From: Zhao Qiang <qiang.zhao@nxp.com>
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Date: Tue, 11 Oct 2016 16:25:07 +0800
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Subject: [PATCH 138/141] pci-layerscape: add MSI interrupt support
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Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
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---
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drivers/iommu/amd_iommu.c | 5 +++--
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drivers/iommu/arm-smmu.c | 21 ++++++++++++++++++
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drivers/iommu/iommu.c | 8 +++----
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drivers/pci/host/pci-layerscape.c | 43 +++++++++++++++++++++++++++++++++++++
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drivers/pci/host/pci-layerscape.h | 17 +++++++++++++++
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drivers/pci/quirks.c | 19 +++++++++-------
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drivers/pci/search.c | 5 ++---
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include/linux/pci.h | 6 +++---
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8 files changed, 104 insertions(+), 20 deletions(-)
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create mode 100644 drivers/pci/host/pci-layerscape.h
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--- a/drivers/iommu/amd_iommu.c
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+++ b/drivers/iommu/amd_iommu.c
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@@ -222,8 +222,9 @@ static u16 get_alias(struct device *dev)
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*/
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if (pci_alias == devid &&
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PCI_BUS_NUM(ivrs_alias) == pdev->bus->number) {
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- pdev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
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- pdev->dma_alias_devfn = ivrs_alias & 0xff;
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+ pdev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
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+ pdev->dma_alias_devid = PCI_DEVID(pdev->bus->number,
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+ ivrs_alias & 0xff);
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pr_info("AMD-Vi: Added PCI DMA alias %02x.%d for %s\n",
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PCI_SLOT(ivrs_alias), PCI_FUNC(ivrs_alias),
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dev_name(dev));
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--- a/drivers/iommu/arm-smmu.c
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+++ b/drivers/iommu/arm-smmu.c
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@@ -45,6 +45,10 @@
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#include <linux/amba/bus.h>
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+#ifdef CONFIG_PCI_LAYERSCAPE
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+#include <../drivers/pci/host/pci-layerscape.h>
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+#endif
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+
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#include "io-pgtable.h"
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/* Maximum number of stream IDs assigned to a single device */
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@@ -1352,6 +1356,23 @@ static int arm_smmu_init_platform_device
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static int arm_smmu_add_device(struct device *dev)
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{
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struct iommu_group *group;
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+#ifdef CONFIG_PCI_LAYERSCAPE
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+ u16 sid;
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+ u32 streamid;
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+ struct pci_dev *pdev;
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+ if (dev_is_pci(dev)) {
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+ pdev = to_pci_dev(dev);
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+
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+ pci_for_each_dma_alias(pdev, __arm_smmu_get_pci_sid, &sid);
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+ streamid = set_pcie_streamid_translation(pdev, sid);
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+ if (~streamid == 0) {
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+ return -ENODEV;
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+ }
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+
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+ pdev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
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+ pdev->dma_alias_devid = streamid;
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+ }
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+#endif
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group = iommu_group_get_for_dev(dev);
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if (IS_ERR(group))
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--- a/drivers/iommu/iommu.c
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+++ b/drivers/iommu/iommu.c
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@@ -686,10 +686,10 @@ static struct iommu_group *get_pci_alias
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continue;
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/* We alias them or they alias us */
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- if (((pdev->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVFN) &&
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- pdev->dma_alias_devfn == tmp->devfn) ||
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- ((tmp->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVFN) &&
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- tmp->dma_alias_devfn == pdev->devfn)) {
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+ if (((pdev->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVID) &&
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+ (pdev->dma_alias_devid & 0xff) == tmp->devfn) ||
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+ ((tmp->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVID) &&
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+ (tmp->dma_alias_devid & 0xff) == pdev->devfn)) {
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group = get_pci_alias_group(tmp, devfns);
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if (group) {
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--- a/drivers/pci/host/pci-layerscape.c
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+++ b/drivers/pci/host/pci-layerscape.c
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@@ -37,6 +37,11 @@
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/* PEX LUT registers */
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#define PCIE_LUT_DBG 0x7FC /* PEX LUT Debug Register */
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+#define PCIE_LUT_UDR(n) (0x800 + (n) * 8)
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+#define PCIE_LUT_LDR(n) (0x804 + (n) * 8)
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+#define PCIE_LUT_MASK_ALL 0xffff
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+#define PCIE_LUT_DR_NUM 32
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+#define PCIE_LUT_ENABLE (1 << 31)
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struct ls_pcie_drvdata {
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u32 lut_offset;
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@@ -52,10 +57,30 @@ struct ls_pcie {
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struct pcie_port pp;
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const struct ls_pcie_drvdata *drvdata;
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int index;
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+ const u32 *avail_streamids;
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+ int streamid_index;
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};
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#define to_ls_pcie(x) container_of(x, struct ls_pcie, pp)
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+u32 set_pcie_streamid_translation(struct pci_dev *pdev, u32 devid)
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+{
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+ u32 index, streamid;
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+ struct pcie_port *pp = pdev->bus->sysdata;
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+ struct ls_pcie *pcie = to_ls_pcie(pp);
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+
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+ if (!pcie->avail_streamids || !pcie->streamid_index)
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+ return ~(u32)0;
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+
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+ index = --pcie->streamid_index;
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+ /* mask is set as all zeroes, want to match all bits */
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+ iowrite32((devid << 16), pcie->lut + PCIE_LUT_UDR(index));
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+ streamid = be32_to_cpup(&pcie->avail_streamids[index]);
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+ iowrite32(streamid | PCIE_LUT_ENABLE, pcie->lut + PCIE_LUT_LDR(index));
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+
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+ return streamid;
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+}
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+
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static bool ls_pcie_is_bridge(struct ls_pcie *pcie)
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{
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u32 header_type;
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@@ -276,10 +301,28 @@ static int __init ls_pcie_probe(struct p
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pcie->drvdata = match->data;
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pcie->lut = pcie->dbi + pcie->drvdata->lut_offset;
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+ /* Disable LDR zero */
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+ iowrite32(0, pcie->lut + PCIE_LUT_LDR(0));
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if (!ls_pcie_is_bridge(pcie))
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return -ENODEV;
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+ if (of_device_is_compatible(pdev->dev.of_node, "fsl,ls2085a-pcie") ||
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+ of_device_is_compatible(pdev->dev.of_node, "fsl,ls2080a-pcie") ||
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+ of_device_is_compatible(pdev->dev.of_node, "fsl,ls1088a-pcie")) {
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+ int len;
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+ const u32 *prop;
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+ struct device_node *np;
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+
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+ np = pdev->dev.of_node;
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+ prop = (u32 *)of_get_property(np, "available-stream-ids", &len);
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+ if (prop) {
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+ pcie->avail_streamids = prop;
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+ pcie->streamid_index = len/sizeof(u32);
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+ } else
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+ dev_err(&pdev->dev, "PCIe endpoint partitioning not possible\n");
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+ }
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+
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ret = ls_add_pcie_port(&pcie->pp, pdev);
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if (ret < 0)
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return ret;
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--- /dev/null
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+++ b/drivers/pci/host/pci-layerscape.h
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@@ -0,0 +1,17 @@
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+/*
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+ * Copyright (C) 2015 Freescale Semiconductor.
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+ *
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+ * Author: Varun Sethi <Varun.Sethi@freescale.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#ifndef _PCI_LAYERSCAPE_H
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+#define _PCI_LAYERSCAPE_H
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+
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+/* function for setting up stream id to device id translation */
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+u32 set_pcie_streamid_translation(struct pci_dev *pdev, u32 devid);
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+
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+#endif /* _PCI_LAYERSCAPE_H */
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--- a/drivers/pci/quirks.c
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+++ b/drivers/pci/quirks.c
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@@ -3589,8 +3589,9 @@ int pci_dev_specific_reset(struct pci_de
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static void quirk_dma_func0_alias(struct pci_dev *dev)
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{
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if (PCI_FUNC(dev->devfn) != 0) {
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- dev->dma_alias_devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 0);
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- dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
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+ dev->dma_alias_devid = PCI_DEVID(dev->bus->number,
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+ PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
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+ dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
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}
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}
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@@ -3605,8 +3606,9 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_R
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static void quirk_dma_func1_alias(struct pci_dev *dev)
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{
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if (PCI_FUNC(dev->devfn) != 1) {
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- dev->dma_alias_devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 1);
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- dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
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+ dev->dma_alias_devid = PCI_DEVID(dev->bus->number,
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+ PCI_DEVFN(PCI_SLOT(dev->devfn), 1));
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+ dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
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}
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}
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@@ -3670,11 +3672,12 @@ static void quirk_fixed_dma_alias(struct
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id = pci_match_id(fixed_dma_alias_tbl, dev);
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if (id) {
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- dev->dma_alias_devfn = id->driver_data;
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- dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
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+ dev->dma_alias_devid = PCI_DEVID(dev->bus->number,
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+ id->driver_data);
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+ dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
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dev_info(&dev->dev, "Enabling fixed DMA alias to %02x.%d\n",
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- PCI_SLOT(dev->dma_alias_devfn),
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- PCI_FUNC(dev->dma_alias_devfn));
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+ PCI_SLOT(dev->dma_alias_devid),
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+ PCI_FUNC(dev->dma_alias_devid));
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}
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}
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--- a/drivers/pci/search.c
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+++ b/drivers/pci/search.c
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@@ -40,9 +40,8 @@ int pci_for_each_dma_alias(struct pci_de
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* If the device is broken and uses an alias requester ID for
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* DMA, iterate over that too.
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*/
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- if (unlikely(pdev->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVFN)) {
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- ret = fn(pdev, PCI_DEVID(pdev->bus->number,
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- pdev->dma_alias_devfn), data);
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+ if (unlikely(pdev->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVID)) {
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+ ret = fn(pdev, pdev->dma_alias_devid, data);
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if (ret)
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return ret;
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}
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--- a/include/linux/pci.h
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+++ b/include/linux/pci.h
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@@ -172,8 +172,8 @@ enum pci_dev_flags {
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PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
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/* Flag for quirk use to store if quirk-specific ACS is enabled */
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PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
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- /* Flag to indicate the device uses dma_alias_devfn */
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- PCI_DEV_FLAGS_DMA_ALIAS_DEVFN = (__force pci_dev_flags_t) (1 << 4),
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+ /* Flag to indicate the device uses dma_alias_devid */
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+ PCI_DEV_FLAGS_DMA_ALIAS_DEVID = (__force pci_dev_flags_t) (1 << 4),
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/* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
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PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
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/* Do not use bus resets for device */
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@@ -279,7 +279,7 @@ struct pci_dev {
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u8 rom_base_reg; /* which config register controls the ROM */
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u8 pin; /* which interrupt pin this device uses */
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u16 pcie_flags_reg; /* cached PCIe Capabilities Register */
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- u8 dma_alias_devfn;/* devfn of DMA alias, if any */
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+ u32 dma_alias_devid;/* devid of DMA alias */
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struct pci_driver *driver; /* which driver has allocated this device */
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u64 dma_mask; /* Mask of the bits of bus address this
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