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openwrt/target/linux/layerscape/patches-4.4/8138-pci-layerscape-add-MSI...

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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
@@ -697,10 +697,10 @@ 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;
@@ -284,10 +309,28 @@ 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
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