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Diffstat (limited to 'target/linux/layerscape/patches-4.4/8138-pci-layerscape-add-MSI-interrupt-support.patch')
-rw-r--r--target/linux/layerscape/patches-4.4/8138-pci-layerscape-add-MSI-interrupt-support.patch259
1 files changed, 259 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-4.4/8138-pci-layerscape-add-MSI-interrupt-support.patch b/target/linux/layerscape/patches-4.4/8138-pci-layerscape-add-MSI-interrupt-support.patch
new file mode 100644
index 0000000000..fd597e5737
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/8138-pci-layerscape-add-MSI-interrupt-support.patch
@@ -0,0 +1,259 @@
+From b0e74277164b17bb0d207ffe16056e13e558f6ba Mon Sep 17 00:00:00 2001
+From: Zhao Qiang <qiang.zhao@nxp.com>
+Date: Tue, 11 Oct 2016 16:25:07 +0800
+Subject: [PATCH 138/141] pci-layerscape: add MSI interrupt support
+
+Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
+---
+ drivers/iommu/amd_iommu.c | 5 +++--
+ drivers/iommu/arm-smmu.c | 21 ++++++++++++++++++
+ drivers/iommu/iommu.c | 8 +++----
+ drivers/pci/host/pci-layerscape.c | 43 +++++++++++++++++++++++++++++++++++++
+ drivers/pci/host/pci-layerscape.h | 17 +++++++++++++++
+ drivers/pci/quirks.c | 19 +++++++++-------
+ drivers/pci/search.c | 5 ++---
+ include/linux/pci.h | 6 +++---
+ 8 files changed, 104 insertions(+), 20 deletions(-)
+ create mode 100644 drivers/pci/host/pci-layerscape.h
+
+--- a/drivers/iommu/amd_iommu.c
++++ b/drivers/iommu/amd_iommu.c
+@@ -222,8 +222,9 @@ static u16 get_alias(struct device *dev)
+ */
+ if (pci_alias == devid &&
+ PCI_BUS_NUM(ivrs_alias) == pdev->bus->number) {
+- pdev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
+- pdev->dma_alias_devfn = ivrs_alias & 0xff;
++ pdev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
++ pdev->dma_alias_devid = PCI_DEVID(pdev->bus->number,
++ ivrs_alias & 0xff);
+ pr_info("AMD-Vi: Added PCI DMA alias %02x.%d for %s\n",
+ PCI_SLOT(ivrs_alias), PCI_FUNC(ivrs_alias),
+ dev_name(dev));
+--- a/drivers/iommu/arm-smmu.c
++++ b/drivers/iommu/arm-smmu.c
+@@ -45,6 +45,10 @@
+
+ #include <linux/amba/bus.h>
+
++#ifdef CONFIG_PCI_LAYERSCAPE
++#include <../drivers/pci/host/pci-layerscape.h>
++#endif
++
+ #include "io-pgtable.h"
+
+ /* Maximum number of stream IDs assigned to a single device */
+@@ -1352,6 +1356,23 @@ static int arm_smmu_init_platform_device
+ static int arm_smmu_add_device(struct device *dev)
+ {
+ struct iommu_group *group;
++#ifdef CONFIG_PCI_LAYERSCAPE
++ u16 sid;
++ u32 streamid;
++ struct pci_dev *pdev;
++ if (dev_is_pci(dev)) {
++ pdev = to_pci_dev(dev);
++
++ pci_for_each_dma_alias(pdev, __arm_smmu_get_pci_sid, &sid);
++ streamid = set_pcie_streamid_translation(pdev, sid);
++ if (~streamid == 0) {
++ return -ENODEV;
++ }
++
++ pdev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
++ pdev->dma_alias_devid = streamid;
++ }
++#endif
+
+ group = iommu_group_get_for_dev(dev);
+ if (IS_ERR(group))
+--- a/drivers/iommu/iommu.c
++++ b/drivers/iommu/iommu.c
+@@ -686,10 +686,10 @@ static struct iommu_group *get_pci_alias
+ continue;
+
+ /* We alias them or they alias us */
+- if (((pdev->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVFN) &&
+- pdev->dma_alias_devfn == tmp->devfn) ||
+- ((tmp->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVFN) &&
+- tmp->dma_alias_devfn == pdev->devfn)) {
++ if (((pdev->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVID) &&
++ (pdev->dma_alias_devid & 0xff) == tmp->devfn) ||
++ ((tmp->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVID) &&
++ (tmp->dma_alias_devid & 0xff) == pdev->devfn)) {
+
+ group = get_pci_alias_group(tmp, devfns);
+ if (group) {
+--- a/drivers/pci/host/pci-layerscape.c
++++ b/drivers/pci/host/pci-layerscape.c
+@@ -37,6 +37,11 @@
+
+ /* PEX LUT registers */
+ #define PCIE_LUT_DBG 0x7FC /* PEX LUT Debug Register */
++#define PCIE_LUT_UDR(n) (0x800 + (n) * 8)
++#define PCIE_LUT_LDR(n) (0x804 + (n) * 8)
++#define PCIE_LUT_MASK_ALL 0xffff
++#define PCIE_LUT_DR_NUM 32
++#define PCIE_LUT_ENABLE (1 << 31)
+
+ struct ls_pcie_drvdata {
+ u32 lut_offset;
+@@ -52,10 +57,30 @@ struct ls_pcie {
+ struct pcie_port pp;
+ const struct ls_pcie_drvdata *drvdata;
+ int index;
++ const u32 *avail_streamids;
++ int streamid_index;
+ };
+
+ #define to_ls_pcie(x) container_of(x, struct ls_pcie, pp)
+
++u32 set_pcie_streamid_translation(struct pci_dev *pdev, u32 devid)
++{
++ u32 index, streamid;
++ struct pcie_port *pp = pdev->bus->sysdata;
++ struct ls_pcie *pcie = to_ls_pcie(pp);
++
++ if (!pcie->avail_streamids || !pcie->streamid_index)
++ return ~(u32)0;
++
++ index = --pcie->streamid_index;
++ /* mask is set as all zeroes, want to match all bits */
++ iowrite32((devid << 16), pcie->lut + PCIE_LUT_UDR(index));
++ streamid = be32_to_cpup(&pcie->avail_streamids[index]);
++ iowrite32(streamid | PCIE_LUT_ENABLE, pcie->lut + PCIE_LUT_LDR(index));
++
++ return streamid;
++}
++
+ static bool ls_pcie_is_bridge(struct ls_pcie *pcie)
+ {
+ u32 header_type;
+@@ -283,10 +308,28 @@ static int __init ls_pcie_probe(struct p
+
+ pcie->drvdata = match->data;
+ pcie->lut = pcie->dbi + pcie->drvdata->lut_offset;
++ /* Disable LDR zero */
++ iowrite32(0, pcie->lut + PCIE_LUT_LDR(0));
+
+ if (!ls_pcie_is_bridge(pcie))
+ return -ENODEV;
+
++ if (of_device_is_compatible(pdev->dev.of_node, "fsl,ls2085a-pcie") ||
++ of_device_is_compatible(pdev->dev.of_node, "fsl,ls2080a-pcie") ||
++ of_device_is_compatible(pdev->dev.of_node, "fsl,ls1088a-pcie")) {
++ int len;
++ const u32 *prop;
++ struct device_node *np;
++
++ np = pdev->dev.of_node;
++ prop = (u32 *)of_get_property(np, "available-stream-ids", &len);
++ if (prop) {
++ pcie->avail_streamids = prop;
++ pcie->streamid_index = len/sizeof(u32);
++ } else
++ dev_err(&pdev->dev, "PCIe endpoint partitioning not possible\n");
++ }
++
+ ret = ls_add_pcie_port(&pcie->pp, pdev);
+ if (ret < 0)
+ return ret;
+--- /dev/null
++++ b/drivers/pci/host/pci-layerscape.h
+@@ -0,0 +1,17 @@
++/*
++ * Copyright (C) 2015 Freescale Semiconductor.
++ *
++ * Author: Varun Sethi <Varun.Sethi@freescale.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#ifndef _PCI_LAYERSCAPE_H
++#define _PCI_LAYERSCAPE_H
++
++/* function for setting up stream id to device id translation */
++u32 set_pcie_streamid_translation(struct pci_dev *pdev, u32 devid);
++
++#endif /* _PCI_LAYERSCAPE_H */
+--- a/drivers/pci/quirks.c
++++ b/drivers/pci/quirks.c
+@@ -3589,8 +3589,9 @@ int pci_dev_specific_reset(struct pci_de
+ static void quirk_dma_func0_alias(struct pci_dev *dev)
+ {
+ if (PCI_FUNC(dev->devfn) != 0) {
+- dev->dma_alias_devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 0);
+- dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
++ dev->dma_alias_devid = PCI_DEVID(dev->bus->number,
++ PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
++ dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
+ }
+ }
+
+@@ -3605,8 +3606,9 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_R
+ static void quirk_dma_func1_alias(struct pci_dev *dev)
+ {
+ if (PCI_FUNC(dev->devfn) != 1) {
+- dev->dma_alias_devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 1);
+- dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
++ dev->dma_alias_devid = PCI_DEVID(dev->bus->number,
++ PCI_DEVFN(PCI_SLOT(dev->devfn), 1));
++ dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
+ }
+ }
+
+@@ -3670,11 +3672,12 @@ static void quirk_fixed_dma_alias(struct
+
+ id = pci_match_id(fixed_dma_alias_tbl, dev);
+ if (id) {
+- dev->dma_alias_devfn = id->driver_data;
+- dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
++ dev->dma_alias_devid = PCI_DEVID(dev->bus->number,
++ id->driver_data);
++ dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVID;
+ dev_info(&dev->dev, "Enabling fixed DMA alias to %02x.%d\n",
+- PCI_SLOT(dev->dma_alias_devfn),
+- PCI_FUNC(dev->dma_alias_devfn));
++ PCI_SLOT(dev->dma_alias_devid),
++ PCI_FUNC(dev->dma_alias_devid));
+ }
+ }
+
+--- a/drivers/pci/search.c
++++ b/drivers/pci/search.c
+@@ -40,9 +40,8 @@ int pci_for_each_dma_alias(struct pci_de
+ * If the device is broken and uses an alias requester ID for
+ * DMA, iterate over that too.
+ */
+- if (unlikely(pdev->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVFN)) {
+- ret = fn(pdev, PCI_DEVID(pdev->bus->number,
+- pdev->dma_alias_devfn), data);
++ if (unlikely(pdev->dev_flags & PCI_DEV_FLAGS_DMA_ALIAS_DEVID)) {
++ ret = fn(pdev, pdev->dma_alias_devid, data);
+ if (ret)
+ return ret;
+ }
+--- a/include/linux/pci.h
++++ b/include/linux/pci.h
+@@ -172,8 +172,8 @@ enum pci_dev_flags {
+ PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
+ /* Flag for quirk use to store if quirk-specific ACS is enabled */
+ PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
+- /* Flag to indicate the device uses dma_alias_devfn */
+- PCI_DEV_FLAGS_DMA_ALIAS_DEVFN = (__force pci_dev_flags_t) (1 << 4),
++ /* Flag to indicate the device uses dma_alias_devid */
++ PCI_DEV_FLAGS_DMA_ALIAS_DEVID = (__force pci_dev_flags_t) (1 << 4),
+ /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
+ PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
+ /* Do not use bus resets for device */
+@@ -279,7 +279,7 @@ struct pci_dev {
+ u8 rom_base_reg; /* which config register controls the ROM */
+ u8 pin; /* which interrupt pin this device uses */
+ u16 pcie_flags_reg; /* cached PCIe Capabilities Register */
+- u8 dma_alias_devfn;/* devfn of DMA alias, if any */
++ u32 dma_alias_devid;/* devid of DMA alias */
+
+ struct pci_driver *driver; /* which driver has allocated this device */
+ u64 dma_mask; /* Mask of the bits of bus address this
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 12:25:58 +0000