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openwrt/target/linux/layerscape/patches-4.9/702-pci-support-layerscape.patch
Koen Vandeputte 3a5498c5e5 kernel: bump 4.9 to 4.9.111 for 18.06 
Refreshed all patches

Compile-tested on: ar71xx
Runtime-tested on: ar71xx

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2018-07-12 13:54:24 +02:00

2085 lines
56 KiB
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Raw Blame History

From 5fcb42fbd224e1103bacbae4785745842cfd6304 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Wed, 17 Jan 2018 15:00:43 +0800
Subject: [PATCH 08/30] pci: support layerscape
This is an integrated patch for layerscape pcie support.
Signed-off-by: Po Liu <po.liu@nxp.com>
Signed-off-by: Liu Gang <Gang.Liu@nxp.com>
Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: hongbo.wang <hongbo.wang@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Mingkai Hu <mingkai.hu@nxp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
drivers/irqchip/irq-ls-scfg-msi.c | 257 +++++++--
drivers/pci/host/Makefile | 2 +-
drivers/pci/host/pci-layerscape-ep-debugfs.c | 758 +++++++++++++++++++++++++++
drivers/pci/host/pci-layerscape-ep.c | 309 +++++++++++
drivers/pci/host/pci-layerscape-ep.h | 115 ++++
drivers/pci/host/pci-layerscape.c | 48 +-
drivers/pci/host/pcie-designware.c | 6 +
drivers/pci/host/pcie-designware.h | 1 +
drivers/pci/pci.c | 2 +-
drivers/pci/pcie/portdrv_core.c | 181 +++----
drivers/pci/quirks.c | 8 +
include/linux/pci.h | 1 +
12 files changed, 1539 insertions(+), 149 deletions(-)
create mode 100644 drivers/pci/host/pci-layerscape-ep-debugfs.c
create mode 100644 drivers/pci/host/pci-layerscape-ep.c
create mode 100644 drivers/pci/host/pci-layerscape-ep.h
--- a/drivers/irqchip/irq-ls-scfg-msi.c
+++ b/drivers/irqchip/irq-ls-scfg-msi.c
@@ -17,13 +17,32 @@
#include <linux/irq.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
#include <linux/of_pci.h>
#include <linux/of_platform.h>
#include <linux/spinlock.h>
-#define MSI_MAX_IRQS 32
-#define MSI_IBS_SHIFT 3
-#define MSIR 4
+#define MSI_IRQS_PER_MSIR 32
+#define MSI_MSIR_OFFSET 4
+
+#define MSI_LS1043V1_1_IRQS_PER_MSIR 8
+#define MSI_LS1043V1_1_MSIR_OFFSET 0x10
+
+struct ls_scfg_msi_cfg {
+ u32 ibs_shift; /* Shift of interrupt bit select */
+ u32 msir_irqs; /* The irq number per MSIR */
+ u32 msir_base; /* The base address of MSIR */
+};
+
+struct ls_scfg_msir {
+ struct ls_scfg_msi *msi_data;
+ unsigned int index;
+ unsigned int gic_irq;
+ unsigned int bit_start;
+ unsigned int bit_end;
+ unsigned int srs; /* Shared interrupt register select */
+ void __iomem *reg;
+};
struct ls_scfg_msi {
spinlock_t lock;
@@ -32,8 +51,11 @@ struct ls_scfg_msi {
struct irq_domain *msi_domain;
void __iomem *regs;
phys_addr_t msiir_addr;
- int irq;
- DECLARE_BITMAP(used, MSI_MAX_IRQS);
+ struct ls_scfg_msi_cfg *cfg;
+ u32 msir_num;
+ struct ls_scfg_msir *msir;
+ u32 irqs_num;
+ unsigned long *used;
};
static struct irq_chip ls_scfg_msi_irq_chip = {
@@ -49,19 +71,56 @@ static struct msi_domain_info ls_scfg_ms
.chip = &ls_scfg_msi_irq_chip,
};
+static int msi_affinity_flag = 1;
+
+static int __init early_parse_ls_scfg_msi(char *p)
+{
+ if (p && strncmp(p, "no-affinity", 11) == 0)
+ msi_affinity_flag = 0;
+ else
+ msi_affinity_flag = 1;
+
+ return 0;
+}
+early_param("lsmsi", early_parse_ls_scfg_msi);
+
static void ls_scfg_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
{
struct ls_scfg_msi *msi_data = irq_data_get_irq_chip_data(data);
msg->address_hi = upper_32_bits(msi_data->msiir_addr);
msg->address_lo = lower_32_bits(msi_data->msiir_addr);
- msg->data = data->hwirq << MSI_IBS_SHIFT;
+ msg->data = data->hwirq;
+
+ if (msi_affinity_flag)
+ msg->data |= cpumask_first(data->common->affinity);
}
static int ls_scfg_msi_set_affinity(struct irq_data *irq_data,
const struct cpumask *mask, bool force)
{
- return -EINVAL;
+ struct ls_scfg_msi *msi_data = irq_data_get_irq_chip_data(irq_data);
+ u32 cpu;
+
+ if (!msi_affinity_flag)
+ return -EINVAL;
+
+ if (!force)
+ cpu = cpumask_any_and(mask, cpu_online_mask);
+ else
+ cpu = cpumask_first(mask);
+
+ if (cpu >= msi_data->msir_num)
+ return -EINVAL;
+
+ if (msi_data->msir[cpu].gic_irq <= 0) {
+ pr_warn("cannot bind the irq to cpu%d\n", cpu);
+ return -EINVAL;
+ }
+
+ cpumask_copy(irq_data->common->affinity, mask);
+
+ return IRQ_SET_MASK_OK;
}
static struct irq_chip ls_scfg_msi_parent_chip = {
@@ -81,8 +140,8 @@ static int ls_scfg_msi_domain_irq_alloc(
WARN_ON(nr_irqs != 1);
spin_lock(&msi_data->lock);
- pos = find_first_zero_bit(msi_data->used, MSI_MAX_IRQS);
- if (pos < MSI_MAX_IRQS)
+ pos = find_first_zero_bit(msi_data->used, msi_data->irqs_num);
+ if (pos < msi_data->irqs_num)
__set_bit(pos, msi_data->used);
else
err = -ENOSPC;
@@ -106,7 +165,7 @@ static void ls_scfg_msi_domain_irq_free(
int pos;
pos = d->hwirq;
- if (pos < 0 || pos >= MSI_MAX_IRQS) {
+ if (pos < 0 || pos >= msi_data->irqs_num) {
pr_err("failed to teardown msi. Invalid hwirq %d\n", pos);
return;
}
@@ -123,15 +182,22 @@ static const struct irq_domain_ops ls_sc
static void ls_scfg_msi_irq_handler(struct irq_desc *desc)
{
- struct ls_scfg_msi *msi_data = irq_desc_get_handler_data(desc);
+ struct ls_scfg_msir *msir = irq_desc_get_handler_data(desc);
+ struct ls_scfg_msi *msi_data = msir->msi_data;
unsigned long val;
- int pos, virq;
+ int pos, size, virq, hwirq;
chained_irq_enter(irq_desc_get_chip(desc), desc);
- val = ioread32be(msi_data->regs + MSIR);
- for_each_set_bit(pos, &val, MSI_MAX_IRQS) {
- virq = irq_find_mapping(msi_data->parent, (31 - pos));
+ val = ioread32be(msir->reg);
+
+ pos = msir->bit_start;
+ size = msir->bit_end + 1;
+
+ for_each_set_bit_from(pos, &val, size) {
+ hwirq = ((msir->bit_end - pos) << msi_data->cfg->ibs_shift) |
+ msir->srs;
+ virq = irq_find_mapping(msi_data->parent, hwirq);
if (virq)
generic_handle_irq(virq);
}
@@ -143,7 +209,7 @@ static int ls_scfg_msi_domains_init(stru
{
/* Initialize MSI domain parent */
msi_data->parent = irq_domain_add_linear(NULL,
- MSI_MAX_IRQS,
+ msi_data->irqs_num,
&ls_scfg_msi_domain_ops,
msi_data);
if (!msi_data->parent) {
@@ -164,16 +230,118 @@ static int ls_scfg_msi_domains_init(stru
return 0;
}
+static int ls_scfg_msi_setup_hwirq(struct ls_scfg_msi *msi_data, int index)
+{
+ struct ls_scfg_msir *msir;
+ int virq, i, hwirq;
+
+ virq = platform_get_irq(msi_data->pdev, index);
+ if (virq <= 0)
+ return -ENODEV;
+
+ msir = &msi_data->msir[index];
+ msir->index = index;
+ msir->msi_data = msi_data;
+ msir->gic_irq = virq;
+ msir->reg = msi_data->regs + msi_data->cfg->msir_base + 4 * index;
+
+ if (msi_data->cfg->msir_irqs == MSI_LS1043V1_1_IRQS_PER_MSIR) {
+ msir->bit_start = 32 - ((msir->index + 1) *
+ MSI_LS1043V1_1_IRQS_PER_MSIR);
+ msir->bit_end = msir->bit_start +
+ MSI_LS1043V1_1_IRQS_PER_MSIR - 1;
+ } else {
+ msir->bit_start = 0;
+ msir->bit_end = msi_data->cfg->msir_irqs - 1;
+ }
+
+ irq_set_chained_handler_and_data(msir->gic_irq,
+ ls_scfg_msi_irq_handler,
+ msir);
+
+ if (msi_affinity_flag) {
+ /* Associate MSIR interrupt to the cpu */
+ irq_set_affinity(msir->gic_irq, get_cpu_mask(index));
+ msir->srs = 0; /* This value is determined by the CPU */
+ } else
+ msir->srs = index;
+
+ /* Release the hwirqs corresponding to this MSIR */
+ if (!msi_affinity_flag || msir->index == 0) {
+ for (i = 0; i < msi_data->cfg->msir_irqs; i++) {
+ hwirq = i << msi_data->cfg->ibs_shift | msir->index;
+ bitmap_clear(msi_data->used, hwirq, 1);
+ }
+ }
+
+ return 0;
+}
+
+static int ls_scfg_msi_teardown_hwirq(struct ls_scfg_msir *msir)
+{
+ struct ls_scfg_msi *msi_data = msir->msi_data;
+ int i, hwirq;
+
+ if (msir->gic_irq > 0)
+ irq_set_chained_handler_and_data(msir->gic_irq, NULL, NULL);
+
+ for (i = 0; i < msi_data->cfg->msir_irqs; i++) {
+ hwirq = i << msi_data->cfg->ibs_shift | msir->index;
+ bitmap_set(msi_data->used, hwirq, 1);
+ }
+
+ return 0;
+}
+
+static struct ls_scfg_msi_cfg ls1021_msi_cfg = {
+ .ibs_shift = 3,
+ .msir_irqs = MSI_IRQS_PER_MSIR,
+ .msir_base = MSI_MSIR_OFFSET,
+};
+
+static struct ls_scfg_msi_cfg ls1046_msi_cfg = {
+ .ibs_shift = 2,
+ .msir_irqs = MSI_IRQS_PER_MSIR,
+ .msir_base = MSI_MSIR_OFFSET,
+};
+
+static struct ls_scfg_msi_cfg ls1043_v1_1_msi_cfg = {
+ .ibs_shift = 2,
+ .msir_irqs = MSI_LS1043V1_1_IRQS_PER_MSIR,
+ .msir_base = MSI_LS1043V1_1_MSIR_OFFSET,
+};
+
+static const struct of_device_id ls_scfg_msi_id[] = {
+ /* The following two misspelled compatibles are obsolete */
+ { .compatible = "fsl,1s1021a-msi", .data = &ls1021_msi_cfg},
+ { .compatible = "fsl,1s1043a-msi", .data = &ls1021_msi_cfg},
+
+ { .compatible = "fsl,ls1012a-msi", .data = &ls1021_msi_cfg },
+ { .compatible = "fsl,ls1021a-msi", .data = &ls1021_msi_cfg },
+ { .compatible = "fsl,ls1043a-msi", .data = &ls1021_msi_cfg },
+ { .compatible = "fsl,ls1043a-v1.1-msi", .data = &ls1043_v1_1_msi_cfg },
+ { .compatible = "fsl,ls1046a-msi", .data = &ls1046_msi_cfg },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ls_scfg_msi_id);
+
static int ls_scfg_msi_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
struct ls_scfg_msi *msi_data;
struct resource *res;
- int ret;
+ int i, ret;
+
+ match = of_match_device(ls_scfg_msi_id, &pdev->dev);
+ if (!match)
+ return -ENODEV;
msi_data = devm_kzalloc(&pdev->dev, sizeof(*msi_data), GFP_KERNEL);
if (!msi_data)
return -ENOMEM;
+ msi_data->cfg = (struct ls_scfg_msi_cfg *) match->data;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
msi_data->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(msi_data->regs)) {
@@ -182,23 +350,48 @@ static int ls_scfg_msi_probe(struct plat
}
msi_data->msiir_addr = res->start;
- msi_data->irq = platform_get_irq(pdev, 0);
- if (msi_data->irq <= 0) {
- dev_err(&pdev->dev, "failed to get MSI irq\n");
- return -ENODEV;
- }
-
msi_data->pdev = pdev;
spin_lock_init(&msi_data->lock);
+ msi_data->irqs_num = MSI_IRQS_PER_MSIR *
+ (1 << msi_data->cfg->ibs_shift);
+ msi_data->used = devm_kcalloc(&pdev->dev,
+ BITS_TO_LONGS(msi_data->irqs_num),
+ sizeof(*msi_data->used),
+ GFP_KERNEL);
+ if (!msi_data->used)
+ return -ENOMEM;
+ /*
+ * Reserve all the hwirqs
+ * The available hwirqs will be released in ls1_msi_setup_hwirq()
+ */
+ bitmap_set(msi_data->used, 0, msi_data->irqs_num);
+
+ msi_data->msir_num = of_irq_count(pdev->dev.of_node);
+
+ if (msi_affinity_flag) {
+ u32 cpu_num;
+
+ cpu_num = num_possible_cpus();
+ if (msi_data->msir_num >= cpu_num)
+ msi_data->msir_num = cpu_num;
+ else
+ msi_affinity_flag = 0;
+ }
+
+ msi_data->msir = devm_kcalloc(&pdev->dev, msi_data->msir_num,
+ sizeof(*msi_data->msir),
+ GFP_KERNEL);
+ if (!msi_data->msir)
+ return -ENOMEM;
+
+ for (i = 0; i < msi_data->msir_num; i++)
+ ls_scfg_msi_setup_hwirq(msi_data, i);
+
ret = ls_scfg_msi_domains_init(msi_data);
if (ret)
return ret;
- irq_set_chained_handler_and_data(msi_data->irq,
- ls_scfg_msi_irq_handler,
- msi_data);
-
platform_set_drvdata(pdev, msi_data);
return 0;
@@ -207,8 +400,10 @@ static int ls_scfg_msi_probe(struct plat
static int ls_scfg_msi_remove(struct platform_device *pdev)
{
struct ls_scfg_msi *msi_data = platform_get_drvdata(pdev);
+ int i;
- irq_set_chained_handler_and_data(msi_data->irq, NULL, NULL);
+ for (i = 0; i < msi_data->msir_num; i++)
+ ls_scfg_msi_teardown_hwirq(&msi_data->msir[i]);
irq_domain_remove(msi_data->msi_domain);
irq_domain_remove(msi_data->parent);
@@ -218,12 +413,6 @@ static int ls_scfg_msi_remove(struct pla
return 0;
}
-static const struct of_device_id ls_scfg_msi_id[] = {
- { .compatible = "fsl,1s1021a-msi", },
- { .compatible = "fsl,1s1043a-msi", },
- {},
-};
-
static struct platform_driver ls_scfg_msi_driver = {
.driver = {
.name = "ls-scfg-msi",
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -17,7 +17,7 @@ obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx
obj-$(CONFIG_PCIE_XILINX_NWL) += pcie-xilinx-nwl.o
obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
obj-$(CONFIG_PCI_XGENE_MSI) += pci-xgene-msi.o
-obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o
+obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o pci-layerscape-ep.o pci-layerscape-ep-debugfs.o
obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
obj-$(CONFIG_PCIE_IPROC_MSI) += pcie-iproc-msi.o
--- /dev/null
+++ b/drivers/pci/host/pci-layerscape-ep-debugfs.c
@@ -0,0 +1,758 @@
+/*
+ * PCIe Endpoint driver for Freescale Layerscape SoCs
+ *
+ * Copyright (C) 2015 Freescale Semiconductor.
+ *
+ * Author: Minghuan Lian <Minghuan.Lian@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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/time.h>
+#include <linux/uaccess.h>
+#include <linux/kthread.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <linux/freezer.h>
+
+#include <linux/completion.h>
+
+#include "pci-layerscape-ep.h"
+
+#define PCIE_ATU_INDEX3 (0x3 << 0)
+#define PCIE_ATU_INDEX2 (0x2 << 0)
+#define PCIE_ATU_INDEX1 (0x1 << 0)
+#define PCIE_ATU_INDEX0 (0x0 << 0)
+
+#define PCIE_BAR0_SIZE (4 * 1024) /* 4K */
+#define PCIE_BAR1_SIZE (8 * 1024) /* 8K for MSIX */
+#define PCIE_BAR2_SIZE (4 * 1024) /* 4K */
+#define PCIE_BAR4_SIZE (1 * 1024 * 1024) /* 1M */
+#define PCIE_MSI_OB_SIZE (4 * 1024) /* 4K */
+
+#define PCIE_MSI_MSG_ADDR_OFF 0x54
+#define PCIE_MSI_MSG_DATA_OFF 0x5c
+
+enum test_type {
+ TEST_TYPE_DMA,
+ TEST_TYPE_MEMCPY
+};
+
+enum test_dirt {
+ TEST_DIRT_READ,
+ TEST_DIRT_WRITE
+};
+
+enum test_status {
+ TEST_IDLE,
+ TEST_BUSY
+};
+
+struct ls_ep_test {
+ struct ls_ep_dev *ep;
+ void __iomem *cfg;
+ void __iomem *buf;
+ void __iomem *out;
+ void __iomem *msi;
+ dma_addr_t cfg_addr;
+ dma_addr_t buf_addr;
+ dma_addr_t out_addr;
+ dma_addr_t bus_addr;
+ dma_addr_t msi_addr;
+ u64 msi_msg_addr;
+ u16 msi_msg_data;
+ struct task_struct *thread;
+ spinlock_t lock;
+ struct completion done;
+ u32 len;
+ int loop;
+ char data;
+ enum test_dirt dirt;
+ enum test_type type;
+ enum test_status status;
+ u64 result; /* Mbps */
+ char cmd[256];
+};
+
+static int ls_pcie_ep_trigger_msi(struct ls_ep_test *test)
+{
+ if (!test->msi)
+ return -EINVAL;
+
+ iowrite32(test->msi_msg_data, test->msi);
+
+ return 0;
+}
+
+static int ls_pcie_ep_test_try_run(struct ls_ep_test *test)
+{
+ int ret;
+
+ spin_lock(&test->lock);
+ if (test->status == TEST_IDLE) {
+ test->status = TEST_BUSY;
+ ret = 0;
+ } else
+ ret = -EBUSY;
+ spin_unlock(&test->lock);
+
+ return ret;
+}
+
+static void ls_pcie_ep_test_done(struct ls_ep_test *test)
+{
+ spin_lock(&test->lock);
+ test->status = TEST_IDLE;
+ spin_unlock(&test->lock);
+}
+
+static void ls_pcie_ep_test_dma_cb(void *arg)
+{
+ struct ls_ep_test *test = arg;
+
+ complete(&test->done);
+}
+
+static int ls_pcie_ep_test_dma(struct ls_ep_test *test)
+{
+ dma_cap_mask_t mask;
+ struct dma_chan *chan;
+ struct dma_device *dma_dev;
+ dma_addr_t src, dst;
+ enum dma_data_direction direction;
+ enum dma_ctrl_flags dma_flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
+ struct timespec start, end, period;
+ int i = 0;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_MEMCPY, mask);
+
+ chan = dma_request_channel(mask, NULL, test);
+ if (!chan) {
+ pr_err("failed to request dma channel\n");
+ return -EINVAL;
+ }
+
+ memset(test->buf, test->data, test->len);
+
+ if (test->dirt == TEST_DIRT_WRITE) {
+ src = test->buf_addr;
+ dst = test->out_addr;
+ direction = DMA_TO_DEVICE;
+ } else {
+ src = test->out_addr;
+ dst = test->buf_addr;
+ direction = DMA_FROM_DEVICE;
+ }
+
+ dma_dev = chan->device;
+ dma_flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
+
+ dma_sync_single_for_device(&test->ep->dev, test->buf_addr,
+ test->len, direction);
+
+ set_freezable();
+
+ getrawmonotonic(&start);
+ while (!kthread_should_stop() && (i < test->loop)) {
+ struct dma_async_tx_descriptor *dma_desc;
+ dma_cookie_t dma_cookie = {0};
+ unsigned long tmo;
+ int status;
+
+ init_completion(&test->done);
+
+ dma_desc = dma_dev->device_prep_dma_memcpy(chan,
+ dst, src,
+ test->len,
+ dma_flags);
+ if (!dma_desc) {
+ pr_err("DMA desc constr failed...\n");
+ goto _err;
+ }
+
+ dma_desc->callback = ls_pcie_ep_test_dma_cb;
+ dma_desc->callback_param = test;
+ dma_cookie = dmaengine_submit(dma_desc);
+
+ if (dma_submit_error(dma_cookie)) {
+ pr_err("DMA submit error....\n");
+ goto _err;
+ }
+
+ /* Trigger the transaction */
+ dma_async_issue_pending(chan);
+
+ tmo = wait_for_completion_timeout(&test->done,
+ msecs_to_jiffies(5 * test->len));
+ if (tmo == 0) {
+ pr_err("Self-test copy timed out, disabling\n");
+ goto _err;
+ }
+
+ status = dma_async_is_tx_complete(chan, dma_cookie,
+ NULL, NULL);
+ if (status != DMA_COMPLETE) {
+ pr_err("got completion callback, but status is %s\n",
+ status == DMA_ERROR ? "error" : "in progress");
+ goto _err;
+ }
+
+ i++;
+ }
+
+ getrawmonotonic(&end);
+ period = timespec_sub(end, start);
+ test->result = test->len * 8ULL * i * 1000;
+ do_div(test->result, period.tv_sec * 1000 * 1000 * 1000 + period.tv_nsec);
+ dma_release_channel(chan);
+
+ return 0;
+
+_err:
+ dma_release_channel(chan);
+ test->result = 0;
+ return -EINVAL;
+}
+
+static int ls_pcie_ep_test_cpy(struct ls_ep_test *test)
+{
+ void *dst, *src;
+ struct timespec start, end, period;
+ int i = 0;
+
+ memset(test->buf, test->data, test->len);
+
+ if (test->dirt == TEST_DIRT_WRITE) {
+ dst = test->out;
+ src = test->buf;
+ } else {
+ dst = test->buf;
+ src = test->out;
+ }
+
+ getrawmonotonic(&start);
+ while (!kthread_should_stop() && i < test->loop) {
+ memcpy(dst, src, test->len);
+ i++;
+ }
+ getrawmonotonic(&end);
+
+ period = timespec_sub(end, start);
+ test->result = test->len * 8ULL * i * 1000;
+ do_div(test->result, period.tv_sec * 1000 * 1000 * 1000 + period.tv_nsec);
+
+ return 0;
+}
+
+int ls_pcie_ep_test_thread(void *arg)
+{
+ int ret;
+
+ struct ls_ep_test *test = arg;
+
+ if (test->type == TEST_TYPE_DMA)
+ ret = ls_pcie_ep_test_dma(test);
+ else
+ ret = ls_pcie_ep_test_cpy(test);
+
+ if (ret) {
+ pr_err("\n%s \ttest failed\n",
+ test->cmd);
+ test->result = 0;
+ } else
+ pr_err("\n%s \tthroughput:%lluMbps\n",
+ test->cmd, test->result);
+
+ ls_pcie_ep_test_done(test);
+
+ ls_pcie_ep_trigger_msi(test);
+
+ do_exit(0);
+}
+
+static int ls_pcie_ep_free_test(struct ls_ep_dev *ep)
+{
+ struct ls_ep_test *test = ep->driver_data;
+
+ if (!test)
+ return 0;
+
+ if (test->status == TEST_BUSY) {
+ kthread_stop(test->thread);
+ dev_info(&ep->dev,
+ "test is running please wait and run again\n");
+ return -EBUSY;
+ }
+
+ if (test->buf)
+ free_pages((unsigned long)test->buf,
+ get_order(PCIE_BAR4_SIZE));
+
+ if (test->cfg)
+ free_pages((unsigned long)test->cfg,
+ get_order(PCIE_BAR2_SIZE));
+
+ if (test->out)
+ iounmap(test->out);
+
+ kfree(test);
+ ep->driver_data = NULL;
+
+ return 0;
+}
+
+static int ls_pcie_ep_init_test(struct ls_ep_dev *ep, u64 bus_addr)
+{
+ struct ls_pcie *pcie = ep->pcie;
+ struct ls_ep_test *test = ep->driver_data;
+ int err;
+
+ if (test) {
+ dev_info(&ep->dev,
+ "Please use 'free' to remove the exiting test\n");
+ return -EBUSY;
+ }
+
+ test = kzalloc(sizeof(*test), GFP_KERNEL);
+ if (!test)
+ return -ENOMEM;
+ ep->driver_data = test;
+ test->ep = ep;
+ spin_lock_init(&test->lock);
+ test->status = TEST_IDLE;
+
+ test->buf = dma_alloc_coherent(pcie->dev, get_order(PCIE_BAR4_SIZE),
+ &test->buf_addr,
+ GFP_KERNEL);
+ if (!test->buf) {
+ dev_info(&ep->dev, "failed to get mem for bar4\n");
+ err = -ENOMEM;
+ goto _err;
+ }
+
+ test->cfg = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+ get_order(PCIE_BAR2_SIZE));
+ if (!test->cfg) {
+ dev_info(&ep->dev, "failed to get mem for bar4\n");
+ err = -ENOMEM;
+ goto _err;
+ }
+ test->cfg_addr = virt_to_phys(test->cfg);
+
+ test->out_addr = pcie->out_base;
+ test->out = ioremap(test->out_addr, PCIE_BAR4_SIZE);
+ if (!test->out) {
+ dev_info(&ep->dev, "failed to map out\n");
+ err = -ENOMEM;
+ goto _err;
+ }
+
+ test->bus_addr = bus_addr;
+
+ test->msi_addr = test->out_addr + PCIE_BAR4_SIZE;
+ test->msi = ioremap(test->msi_addr, PCIE_MSI_OB_SIZE);
+ if (!test->msi)
+ dev_info(&ep->dev, "failed to map MSI outbound region\n");
+
+ test->msi_msg_addr = ioread32(pcie->dbi + PCIE_MSI_MSG_ADDR_OFF) |
+ (((u64)ioread32(pcie->dbi + PCIE_MSI_MSG_ADDR_OFF + 4)) << 32);
+ test->msi_msg_data = ioread16(pcie->dbi + PCIE_MSI_MSG_DATA_OFF);
+
+ ls_pcie_ep_dev_cfg_enable(ep);
+
+ /* outbound iATU for memory */
+ ls_pcie_iatu_outbound_set(pcie, 0, PCIE_ATU_TYPE_MEM,
+ test->out_addr, bus_addr, PCIE_BAR4_SIZE);
+ /* outbound iATU for MSI */
+ ls_pcie_iatu_outbound_set(pcie, 1, PCIE_ATU_TYPE_MEM,
+ test->msi_addr, test->msi_msg_addr,
+ PCIE_MSI_OB_SIZE);
+
+ /* ATU 0 : INBOUND : map BAR0 */
+ ls_pcie_iatu_inbound_set(pcie, 0, 0, test->cfg_addr);
+ /* ATU 2 : INBOUND : map BAR2 */
+ ls_pcie_iatu_inbound_set(pcie, 2, 2, test->cfg_addr);
+ /* ATU 3 : INBOUND : map BAR4 */
+ ls_pcie_iatu_inbound_set(pcie, 3, 4, test->buf_addr);
+
+ return 0;
+
+_err:
+ ls_pcie_ep_free_test(ep);
+ return err;
+}
+
+static int ls_pcie_ep_start_test(struct ls_ep_dev *ep, char *cmd)
+{
+ struct ls_ep_test *test = ep->driver_data;
+ enum test_type type;
+ enum test_dirt dirt;
+ u32 cnt, len, loop;
+ unsigned int data;
+ char dirt_str[2];
+ int ret;
+
+ if (strncmp(cmd, "dma", 3) == 0)
+ type = TEST_TYPE_DMA;
+ else
+ type = TEST_TYPE_MEMCPY;
+
+ cnt = sscanf(&cmd[4], "%1s %u %u %x", dirt_str, &len, &loop, &data);
+ if (cnt != 4) {
+ dev_info(&ep->dev, "format error %s", cmd);
+ dev_info(&ep->dev, "dma/cpy <r/w> <packet_size> <loop> <data>\n");
+ return -EINVAL;
+ }
+
+ if (strncmp(dirt_str, "r", 1) == 0)
+ dirt = TEST_DIRT_READ;
+ else
+ dirt = TEST_DIRT_WRITE;
+
+ if (len > PCIE_BAR4_SIZE) {
+ dev_err(&ep->dev, "max len is %d", PCIE_BAR4_SIZE);
+ return -EINVAL;
+ }
+
+ if (!test) {
+ dev_err(&ep->dev, "Please first run init command\n");
+ return -EINVAL;
+ }
+
+ if (ls_pcie_ep_test_try_run(test)) {
+ dev_err(&ep->dev, "There is already a test running\n");
+ return -EINVAL;
+ }
+
+ test->len = len;
+ test->loop = loop;
+ test->type = type;
+ test->data = (char)data;
+ test->dirt = dirt;
+ strcpy(test->cmd, cmd);
+ test->thread = kthread_run(ls_pcie_ep_test_thread, test,
+ "pcie ep test");
+ if (IS_ERR(test->thread)) {
+ dev_err(&ep->dev, "fork failed for pcie ep test\n");
+ ls_pcie_ep_test_done(test);
+ ret = PTR_ERR(test->thread);
+ }
+
+ return ret;
+}
+
+
+/**
+ * ls_pcie_reg_ops_read - read for regs data
+ * @filp: the opened file
+ * @buffer: where to write the data for the user to read
+ * @count: the size of the user's buffer
+ * @ppos: file position offset
+ **/
+static ssize_t ls_pcie_ep_dbg_regs_read(struct file *filp, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct ls_ep_dev *ep = filp->private_data;
+ struct ls_pcie *pcie = ep->pcie;
+ char *buf;
+ int desc = 0, i, len;
+
+ buf = kmalloc(4 * 1024, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ls_pcie_ep_dev_cfg_enable(ep);
+
+ desc += sprintf(buf + desc, "%s", "reg info:");
+ for (i = 0; i < 0x200; i += 4) {
+ if (i % 16 == 0)
+ desc += sprintf(buf + desc, "\n%08x:", i);
+ desc += sprintf(buf + desc, " %08x", readl(pcie->dbi + i));
+ }
+
+ desc += sprintf(buf + desc, "\n%s", "outbound iATU info:\n");
+ for (i = 0; i < 6; i++) {
+ writel(PCIE_ATU_REGION_OUTBOUND | i,
+ pcie->dbi + PCIE_ATU_VIEWPORT);
+ desc += sprintf(buf + desc, "iATU%d", i);
+ desc += sprintf(buf + desc, "\tLOWER PHYS 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_LOWER_BASE));
+ desc += sprintf(buf + desc, "\tUPPER PHYS 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_UPPER_BASE));
+ desc += sprintf(buf + desc, "\tLOWER BUS 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_LOWER_TARGET));
+ desc += sprintf(buf + desc, "\tUPPER BUS 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_UPPER_TARGET));
+ desc += sprintf(buf + desc, "\tLIMIT 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_LIMIT));
+ desc += sprintf(buf + desc, "\tCR1 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_CR1));
+ desc += sprintf(buf + desc, "\tCR2 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_CR2));
+ }
+
+ desc += sprintf(buf + desc, "\n%s", "inbound iATU info:\n");
+ for (i = 0; i < 6; i++) {
+ writel(PCIE_ATU_REGION_INBOUND | i,
+ pcie->dbi + PCIE_ATU_VIEWPORT);
+ desc += sprintf(buf + desc, "iATU%d", i);
+ desc += sprintf(buf + desc, "\tLOWER BUS 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_LOWER_BASE));
+ desc += sprintf(buf + desc, "\tUPPER BUSs 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_UPPER_BASE));
+ desc += sprintf(buf + desc, "\tLOWER PHYS 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_LOWER_TARGET));
+ desc += sprintf(buf + desc, "\tUPPER PHYS 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_UPPER_TARGET));
+ desc += sprintf(buf + desc, "\tLIMIT 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_LIMIT));
+ desc += sprintf(buf + desc, "\tCR1 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_CR1));
+ desc += sprintf(buf + desc, "\tCR2 0x%08x\n",
+ readl(pcie->dbi + PCIE_ATU_CR2));
+ }
+
+ len = simple_read_from_buffer(buffer, count, ppos, buf, desc);
+ kfree(buf);
+
+ return len;
+}
+
+/**
+ * ls_pcie_ep_dbg_regs_write - write into regs datum
+ * @filp: the opened file
+ * @buffer: where to find the user's data
+ * @count: the length of the user's data
+ * @ppos: file position offset
+ **/
+static ssize_t ls_pcie_ep_dbg_regs_write(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct ls_ep_dev *ep = filp->private_data;
+ struct ls_pcie *pcie = ep->pcie;
+ char buf[256];
+
+ if (count >= sizeof(buf))
+ return -ENOSPC;
+
+ memset(buf, 0, sizeof(buf));
+
+ if (copy_from_user(buf, buffer, count))
+ return -EFAULT;
+
+ ls_pcie_ep_dev_cfg_enable(ep);
+
+ if (strncmp(buf, "reg", 3) == 0) {
+ u32 reg, value;
+ int cnt;
+
+ cnt = sscanf(&buf[3], "%x %x", &reg, &value);
+ if (cnt == 2) {
+ writel(value, pcie->dbi + reg);
+ value = readl(pcie->dbi + reg);
+ dev_info(&ep->dev, "reg 0x%08x: 0x%08x\n",
+ reg, value);
+ } else {
+ dev_info(&ep->dev, "reg <reg> <value>\n");
+ }
+ } else if (strncmp(buf, "atu", 3) == 0) {
+ /* to do */
+ dev_info(&ep->dev, " Not support atu command\n");
+ } else {
+ dev_info(&ep->dev, "Unknown command %s\n", buf);
+ dev_info(&ep->dev, "Available commands:\n");
+ dev_info(&ep->dev, " reg <reg> <value>\n");
+ }
+
+ return count;
+}
+
+static const struct file_operations ls_pcie_ep_dbg_regs_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = ls_pcie_ep_dbg_regs_read,
+ .write = ls_pcie_ep_dbg_regs_write,
+};
+
+static ssize_t ls_pcie_ep_dbg_test_read(struct file *filp,
+ char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct ls_ep_dev *ep = filp->private_data;
+ struct ls_ep_test *test = ep->driver_data;
+ char buf[512];
+ int desc = 0, len;
+
+ if (!test) {
+ dev_info(&ep->dev, " there is NO test\n");
+ return 0;
+ }
+
+ if (test->status != TEST_IDLE) {
+ dev_info(&ep->dev, "test %s is running\n", test->cmd);
+ return 0;
+ }
+
+ desc = sprintf(buf, "MSI ADDR:0x%llx MSI DATA:0x%x\n",
+ test->msi_msg_addr, test->msi_msg_data);
+
+ desc += sprintf(buf + desc, "%s throughput:%lluMbps\n",
+ test->cmd, test->result);
+
+ len = simple_read_from_buffer(buffer, count, ppos,
+ buf, desc);
+
+ return len;
+}
+
+static ssize_t ls_pcie_ep_dbg_test_write(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct ls_ep_dev *ep = filp->private_data;
+ char buf[256];
+
+ if (count >= sizeof(buf))
+ return -ENOSPC;
+
+ memset(buf, 0, sizeof(buf));
+
+ if (copy_from_user(buf, buffer, count))
+ return -EFAULT;
+
+ if (strncmp(buf, "init", 4) == 0) {
+ int i = 4;
+ u64 bus_addr;
+
+ while (buf[i] == ' ')
+ i++;
+
+ if (kstrtou64(&buf[i], 0, &bus_addr))
+ dev_info(&ep->dev, "command: init <bus_addr>\n");
+ else {
+ if (ls_pcie_ep_init_test(ep, bus_addr))
+ dev_info(&ep->dev, "failed to init test\n");
+ }
+ } else if (strncmp(buf, "free", 4) == 0)
+ ls_pcie_ep_free_test(ep);
+ else if (strncmp(buf, "dma", 3) == 0 ||
+ strncmp(buf, "cpy", 3) == 0)
+ ls_pcie_ep_start_test(ep, buf);
+ else {
+ dev_info(&ep->dev, "Unknown command: %s\n", buf);
+ dev_info(&ep->dev, "Available commands:\n");
+ dev_info(&ep->dev, "\tinit <bus_addr>\n");
+ dev_info(&ep->dev, "\t<dma/cpy> <r/w> <packet_size> <loop>\n");
+ dev_info(&ep->dev, "\tfree\n");
+ }
+
+ return count;
+}
+
+static const struct file_operations ls_pcie_ep_dbg_test_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = ls_pcie_ep_dbg_test_read,
+ .write = ls_pcie_ep_dbg_test_write,
+};
+
+static ssize_t ls_pcie_ep_dbg_dump_read(struct file *filp,
+ char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct ls_ep_dev *ep = filp->private_data;
+ struct ls_ep_test *test = ep->driver_data;
+ char *buf;
+ int desc = 0, i, len;
+
+ buf = kmalloc(4 * 1024, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ if (!test) {
+ dev_info(&ep->dev, " there is NO test\n");
+ kfree(buf);
+ return 0;
+ }
+
+ desc += sprintf(buf + desc, "%s", "dump info:");
+ for (i = 0; i < 256; i += 4) {
+ if (i % 16 == 0)
+ desc += sprintf(buf + desc, "\n%08x:", i);
+ desc += sprintf(buf + desc, " %08x", readl(test->buf + i));
+ }
+
+ desc += sprintf(buf + desc, "\n");
+ len = simple_read_from_buffer(buffer, count, ppos, buf, desc);
+
+ kfree(buf);
+
+ return len;
+}
+
+static const struct file_operations ls_pcie_ep_dbg_dump_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = ls_pcie_ep_dbg_dump_read,
+};
+
+static int ls_pcie_ep_dev_dbgfs_init(struct ls_ep_dev *ep)
+{
+ struct ls_pcie *pcie = ep->pcie;
+ struct dentry *pfile;
+
+ ls_pcie_ep_dev_cfg_enable(ep);
+
+ ep->dir = debugfs_create_dir(dev_name(&ep->dev), pcie->dir);
+ if (!ep->dir)
+ return -ENOMEM;
+
+ pfile = debugfs_create_file("regs", 0600, ep->dir, ep,
+ &ls_pcie_ep_dbg_regs_fops);
+ if (!pfile)
+ dev_info(&ep->dev, "debugfs regs for failed\n");
+
+ pfile = debugfs_create_file("test", 0600, ep->dir, ep,
+ &ls_pcie_ep_dbg_test_fops);
+ if (!pfile)
+ dev_info(&ep->dev, "debugfs test for failed\n");
+
+ pfile = debugfs_create_file("dump", 0600, ep->dir, ep,
+ &ls_pcie_ep_dbg_dump_fops);
+ if (!pfile)
+ dev_info(&ep->dev, "debugfs dump for failed\n");
+
+ return 0;
+}
+
+int ls_pcie_ep_dbgfs_init(struct ls_pcie *pcie)
+{
+ struct ls_ep_dev *ep;
+
+ pcie->dir = debugfs_create_dir(dev_name(pcie->dev), NULL);
+ if (!pcie->dir)
+ return -ENOMEM;
+
+ list_for_each_entry(ep, &pcie->ep_list, node)
+ ls_pcie_ep_dev_dbgfs_init(ep);
+
+ return 0;
+}
+
+int ls_pcie_ep_dbgfs_remove(struct ls_pcie *pcie)
+{
+ debugfs_remove_recursive(pcie->dir);
+ return 0;
+}
+
+MODULE_AUTHOR("Minghuan Lian <Minghuan.Lian@freescale.com>");
+MODULE_DESCRIPTION("Freescale Layerscape PCIe EP controller driver");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+++ b/drivers/pci/host/pci-layerscape-ep.c
@@ -0,0 +1,309 @@
+/*
+ * PCIe Endpoint driver for Freescale Layerscape SoCs
+ *
+ * Copyright (C) 2015 Freescale Semiconductor.
+ *
+ * Author: Minghuan Lian <Minghuan.Lian@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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/resource.h>
+#include <linux/debugfs.h>
+#include <linux/time.h>
+#include <linux/uaccess.h>
+
+#include "pci-layerscape-ep.h"
+
+struct ls_ep_dev *
+ls_pci_ep_find(struct ls_pcie *pcie, int dev_id)
+{
+ struct ls_ep_dev *ep;
+
+ list_for_each_entry(ep, &pcie->ep_list, node) {
+ if (ep->dev_id == dev_id)
+ return ep;
+ }
+
+ return NULL;
+}
+
+static void ls_pcie_try_cfg2(struct ls_pcie *pcie, int pf, int vf)
+{
+ if (pcie->sriov)
+ writel(PCIE_LCTRL0_VAL(pf, vf),
+ pcie->dbi + PCIE_LUT_BASE + PCIE_LUT_LCTRL0);
+}
+
+static bool ls_pcie_is_bridge(struct ls_pcie *pcie)
+{
+ u32 header_type = 0;
+
+ header_type = readl(pcie->dbi + (PCI_HEADER_TYPE & ~0x3));
+ header_type = (header_type >> 16) & 0x7f;
+
+ return header_type == PCI_HEADER_TYPE_BRIDGE;
+}
+
+void ls_pcie_iatu_outbound_set(struct ls_pcie *pcie, int idx, int type,
+ u64 cpu_addr, u64 pci_addr, u32 size)
+{
+ writel(PCIE_ATU_REGION_OUTBOUND | idx,
+ pcie->dbi + PCIE_ATU_VIEWPORT);
+ writel(lower_32_bits(cpu_addr),
+ pcie->dbi + PCIE_ATU_LOWER_BASE);
+ writel(upper_32_bits(cpu_addr),
+ pcie->dbi + PCIE_ATU_UPPER_BASE);
+ writel(lower_32_bits(cpu_addr + size - 1),
+ pcie->dbi + PCIE_ATU_LIMIT);
+ writel(lower_32_bits(pci_addr),
+ pcie->dbi + PCIE_ATU_LOWER_TARGET);
+ writel(upper_32_bits(pci_addr),
+ pcie->dbi + PCIE_ATU_UPPER_TARGET);
+ writel(type, pcie->dbi + PCIE_ATU_CR1);
+ writel(PCIE_ATU_ENABLE, pcie->dbi + PCIE_ATU_CR2);
+}
+
+/* Use bar match mode and MEM type as default */
+void ls_pcie_iatu_inbound_set(struct ls_pcie *pcie, int idx,
+ int bar, u64 phys)
+{
+ writel(PCIE_ATU_REGION_INBOUND | idx, pcie->dbi + PCIE_ATU_VIEWPORT);
+ writel((u32)phys, pcie->dbi + PCIE_ATU_LOWER_TARGET);
+ writel(phys >> 32, pcie->dbi + PCIE_ATU_UPPER_TARGET);
+ writel(PCIE_ATU_TYPE_MEM, pcie->dbi + PCIE_ATU_CR1);
+ writel(PCIE_ATU_ENABLE | PCIE_ATU_BAR_MODE_ENABLE |
+ PCIE_ATU_BAR_NUM(bar), pcie->dbi + PCIE_ATU_CR2);
+}
+
+void ls_pcie_ep_dev_cfg_enable(struct ls_ep_dev *ep)
+{
+ ls_pcie_try_cfg2(ep->pcie, ep->pf_idx, ep->vf_idx);
+}
+
+void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size)
+{
+ if (size < 4 * 1024)
+ return;
+
+ switch (bar) {
+ case 0:
+ writel(size - 1, bar_base + PCI_BASE_ADDRESS_0);
+ break;
+ case 1:
+ writel(size - 1, bar_base + PCI_BASE_ADDRESS_1);
+ break;
+ case 2:
+ writel(size - 1, bar_base + PCI_BASE_ADDRESS_2);
+ writel(0, bar_base + PCI_BASE_ADDRESS_3);
+ break;
+ case 4:
+ writel(size - 1, bar_base + PCI_BASE_ADDRESS_4);
+ writel(0, bar_base + PCI_BASE_ADDRESS_5);
+ break;
+ default:
+ break;
+ }
+}
+
+void ls_pcie_ep_dev_setup_bar(struct ls_ep_dev *ep, int bar, u32 size)
+{
+ struct ls_pcie *pcie = ep->pcie;
+ void *bar_base;
+
+ if (size < 4 * 1024)
+ return;
+
+ if (pcie->sriov)
+ bar_base = pcie->dbi;
+ else
+ bar_base = pcie->dbi + PCIE_NO_SRIOV_BAR_BASE;
+
+ ls_pcie_ep_dev_cfg_enable(ep);
+ ls_pcie_ep_setup_bar(bar_base, bar, size);
+}
+
+static int ls_pcie_ep_dev_init(struct ls_pcie *pcie, int pf_idx, int vf_idx)
+{
+ struct ls_ep_dev *ep;
+
+ ep = devm_kzalloc(pcie->dev, sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->pcie = pcie;
+ ep->pf_idx = pf_idx;
+ ep->vf_idx = vf_idx;
+ if (vf_idx)
+ ep->dev_id = pf_idx + 4 + 4 * (vf_idx - 1);
+ else
+ ep->dev_id = pf_idx;
+
+ if (ep->vf_idx)
+ dev_set_name(&ep->dev, "pf%d-vf%d",
+ ep->pf_idx,
+ ep->vf_idx);
+ else
+ dev_set_name(&ep->dev, "pf%d",
+ ep->pf_idx);
+
+ list_add_tail(&ep->node, &pcie->ep_list);
+
+ return 0;
+}
+
+static int ls_pcie_ep_init(struct ls_pcie *pcie)
+{
+ u32 sriov_header;
+ int pf, vf, i, j;
+
+ sriov_header = readl(pcie->dbi + PCIE_SRIOV_POS);
+
+ if (PCI_EXT_CAP_ID(sriov_header) == PCI_EXT_CAP_ID_SRIOV) {
+ pcie->sriov = PCIE_SRIOV_POS;
+ pf = PCIE_PF_NUM;
+ vf = PCIE_VF_NUM;
+ } else {
+ pcie->sriov = 0;
+ pf = 1;
+ vf = 0;
+ }
+
+ for (i = 0; i < pf; i++) {
+ for (j = 0; j <= vf; j++)
+ ls_pcie_ep_dev_init(pcie, i, j);
+ }
+
+ return 0;
+}
+
+static struct ls_pcie_ep_drvdata ls1043_drvdata = {
+ .lut_offset = 0x10000,
+ .ltssm_shift = 24,
+ .lut_dbg = 0x7fc,
+};
+
+static struct ls_pcie_ep_drvdata ls1046_drvdata = {
+ .lut_offset = 0x80000,
+ .ltssm_shift = 24,
+ .lut_dbg = 0x407fc,
+};
+
+static struct ls_pcie_ep_drvdata ls2080_drvdata = {
+ .lut_offset = 0x80000,
+ .ltssm_shift = 0,
+ .lut_dbg = 0x7fc,
+};
+
+static const struct of_device_id ls_pcie_ep_of_match[] = {
+ { .compatible = "fsl,ls1021a-pcie", },
+ { .compatible = "fsl,ls1043a-pcie", .data = &ls1043_drvdata },
+ { .compatible = "fsl,ls1046a-pcie", .data = &ls1046_drvdata },
+ { .compatible = "fsl,ls2080a-pcie", .data = &ls2080_drvdata },
+ { .compatible = "fsl,ls2085a-pcie", .data = &ls2080_drvdata },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ls_pcie_ep_of_match);
+
+static int ls_pcie_ep_probe(struct platform_device *pdev)
+{
+ struct ls_pcie *pcie;
+ struct resource *dbi_base, *cfg_res;
+ const struct of_device_id *match;
+ int ret;
+
+ match = of_match_device(ls_pcie_ep_of_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+
+ pcie = devm_kzalloc(&pdev->dev, sizeof(*pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+
+ pcie->dev = &pdev->dev;
+ INIT_LIST_HEAD(&pcie->ep_list);
+
+ dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
+ pcie->dbi = devm_ioremap_resource(&pdev->dev, dbi_base);
+ if (IS_ERR(pcie->dbi)) {
+ dev_err(&pdev->dev, "missing *regs* space\n");
+ return PTR_ERR(pcie->dbi);
+ }
+
+ pcie->drvdata = match->data;
+ pcie->lut = pcie->dbi + pcie->drvdata->lut_offset;
+
+ if (ls_pcie_is_bridge(pcie))
+ return -ENODEV;
+
+ dev_info(pcie->dev, "in EP mode\n");
+
+ cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
+ if (cfg_res)
+ pcie->out_base = cfg_res->start;
+ else {
+ dev_err(&pdev->dev, "missing *config* space\n");
+ return -ENODEV;
+ }
+
+ ret = ls_pcie_ep_init(pcie);
+ if (ret)
+ return ret;
+
+ ls_pcie_ep_dbgfs_init(pcie);
+
+ platform_set_drvdata(pdev, pcie);
+
+ return 0;
+}
+
+static int ls_pcie_ep_dev_remove(struct ls_ep_dev *ep)
+{
+ list_del(&ep->node);
+
+ return 0;
+}
+
+static int ls_pcie_ep_remove(struct platform_device *pdev)
+{
+ struct ls_pcie *pcie = platform_get_drvdata(pdev);
+ struct ls_ep_dev *ep, *tmp;
+
+ if (!pcie)
+ return 0;
+
+ ls_pcie_ep_dbgfs_remove(pcie);
+
+ list_for_each_entry_safe(ep, tmp, &pcie->ep_list, node)
+ ls_pcie_ep_dev_remove(ep);
+
+ return 0;
+}
+
+static struct platform_driver ls_pcie_ep_driver = {
+ .driver = {
+ .name = "ls-pcie-ep",
+ .owner = THIS_MODULE,
+ .of_match_table = ls_pcie_ep_of_match,
+ },
+ .probe = ls_pcie_ep_probe,
+ .remove = ls_pcie_ep_remove,
+};
+
+module_platform_driver(ls_pcie_ep_driver);
+
+MODULE_AUTHOR("Minghuan Lian <Minghuan.Lian@freescale.com>");
+MODULE_DESCRIPTION("Freescale Layerscape PCIe EP driver");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+++ b/drivers/pci/host/pci-layerscape-ep.h
@@ -0,0 +1,115 @@
+/*
+ * PCIe Endpoint driver for Freescale Layerscape SoCs
+ *
+ * Copyright (C) 2015 Freescale Semiconductor.
+ *
+ * Author: Minghuan Lian <Minghuan.Lian@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 _PCIE_LAYERSCAPE_EP_H
+#define _PCIE_LAYERSCAPE_EP_H
+
+#include <linux/device.h>
+
+/* Synopsis specific PCIE configuration registers */
+#define PCIE_ATU_VIEWPORT 0x900
+#define PCIE_ATU_REGION_INBOUND (0x1 << 31)
+#define PCIE_ATU_REGION_OUTBOUND (0x0 << 31)
+#define PCIE_ATU_REGION_INDEX3 (0x3 << 0)
+#define PCIE_ATU_REGION_INDEX2 (0x2 << 0)
+#define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
+#define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
+#define PCIE_ATU_CR1 0x904
+#define PCIE_ATU_TYPE_MEM (0x0 << 0)
+#define PCIE_ATU_TYPE_IO (0x2 << 0)
+#define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
+#define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
+#define PCIE_ATU_CR2 0x908
+#define PCIE_ATU_ENABLE (0x1 << 31)
+#define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
+#define PCIE_ATU_LOWER_BASE 0x90C
+#define PCIE_ATU_UPPER_BASE 0x910
+#define PCIE_ATU_LIMIT 0x914
+#define PCIE_ATU_LOWER_TARGET 0x918
+#define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
+#define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
+#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
+#define PCIE_ATU_UPPER_TARGET 0x91C
+
+/* PEX internal configuration registers */
+#define PCIE_DBI_RO_WR_EN 0x8bc /* DBI Read-Only Write Enable Register */
+
+/* PEX LUT registers */
+#define PCIE_LUT_BASE 0x80000
+#define PCIE_LUT_DBG 0x7FC /* PEX LUT Debug register */
+
+#define PCIE_LUT_LCTRL0 0x7F8
+
+#define PCIE_ATU_BAR_NUM(bar) ((bar) << 8)
+#define PCIE_LCTRL0_CFG2_ENABLE (1 << 31)
+#define PCIE_LCTRL0_VF(vf) ((vf) << 22)
+#define PCIE_LCTRL0_PF(pf) ((pf) << 16)
+#define PCIE_LCTRL0_VF_ACTIVE (1 << 21)
+#define PCIE_LCTRL0_VAL(pf, vf) (PCIE_LCTRL0_PF(pf) | \
+ PCIE_LCTRL0_VF(vf) | \
+ ((vf) == 0 ? 0 : PCIE_LCTRL0_VF_ACTIVE) | \
+ PCIE_LCTRL0_CFG2_ENABLE)
+
+#define PCIE_NO_SRIOV_BAR_BASE 0x1000
+
+#define PCIE_SRIOV_POS 0x178
+#define PCIE_PF_NUM 2
+#define PCIE_VF_NUM 64
+
+struct ls_pcie_ep_drvdata {
+ u32 lut_offset;
+ u32 ltssm_shift;
+ u32 lut_dbg;
+};
+
+struct ls_pcie {
+ struct list_head ep_list;
+ struct device *dev;
+ struct dentry *dir;
+ const struct ls_pcie_ep_drvdata *drvdata;
+ void __iomem *dbi;
+ void __iomem *lut;
+ phys_addr_t out_base;
+ int sriov;
+ int index;
+};
+
+struct ls_ep_dev {
+ struct list_head node;
+ struct ls_pcie *pcie;
+ struct device dev;
+ struct dentry *dir;
+ int pf_idx;
+ int vf_idx;
+ int dev_id;
+ void *driver_data;
+};
+
+struct ls_ep_dev *ls_pci_ep_find(struct ls_pcie *pcie, int dev_id);
+
+void ls_pcie_iatu_outbound_set(struct ls_pcie *pcie, int idx, int type,
+ u64 cpu_addr, u64 pci_addr, u32 size);
+
+/* Use bar match mode and MEM type as default */
+void ls_pcie_iatu_inbound_set(struct ls_pcie *pcie, int idx,
+ int bar, u64 phys);
+
+void ls_pcie_ep_dev_setup_bar(struct ls_ep_dev *ep, int bar, u32 size);
+
+
+void ls_pcie_ep_dev_cfg_enable(struct ls_ep_dev *ep);
+
+int ls_pcie_ep_dbgfs_init(struct ls_pcie *pcie);
+int ls_pcie_ep_dbgfs_remove(struct ls_pcie *pcie);
+
+#endif /* _PCIE_LAYERSCAPE_EP_H */
--- a/drivers/pci/host/pci-layerscape.c
+++ b/drivers/pci/host/pci-layerscape.c
@@ -33,14 +33,18 @@
/* PEX Internal Configuration Registers */
#define PCIE_STRFMR1 0x71c /* Symbol Timer & Filter Mask Register1 */
+#define PCIE_ABSERR 0x8d0 /* Bridge Slave Error Response Register */
+#define PCIE_ABSERR_SETTING 0x9401 /* Forward error of non-posted request */
#define PCIE_DBI_RO_WR_EN 0x8bc /* DBI Read-Only Write Enable Register */
-/* PEX LUT registers */
-#define PCIE_LUT_DBG 0x7FC /* PEX LUT Debug Register */
+#define PCIE_IATU_NUM 6
+
+static void ls_pcie_host_init(struct pcie_port *pp);
struct ls_pcie_drvdata {
u32 lut_offset;
u32 ltssm_shift;
+ u32 lut_dbg;
struct pcie_host_ops *ops;
};
@@ -86,6 +90,14 @@ static void ls_pcie_drop_msg_tlp(struct
iowrite32(val, pcie->pp.dbi_base + PCIE_STRFMR1);
}
+static void ls_pcie_disable_outbound_atus(struct ls_pcie *pcie)
+{
+ int i;
+
+ for (i = 0; i < PCIE_IATU_NUM; i++)
+ dw_pcie_disable_outbound_atu(&pcie->pp, i);
+}
+
static int ls1021_pcie_link_up(struct pcie_port *pp)
{
u32 state;
@@ -134,7 +146,7 @@ static int ls_pcie_link_up(struct pcie_p
struct ls_pcie *pcie = to_ls_pcie(pp);
u32 state;
- state = (ioread32(pcie->lut + PCIE_LUT_DBG) >>
+ state = (ioread32(pcie->lut + pcie->drvdata->lut_dbg) >>
pcie->drvdata->ltssm_shift) &
LTSSM_STATE_MASK;
@@ -144,6 +156,12 @@ static int ls_pcie_link_up(struct pcie_p
return 1;
}
+/* Forward error response of outbound non-posted requests */
+static void ls_pcie_fix_error_response(struct ls_pcie *pcie)
+{
+ iowrite32(PCIE_ABSERR_SETTING, pcie->pp.dbi_base + PCIE_ABSERR);
+}
+
static void ls_pcie_host_init(struct pcie_port *pp)
{
struct ls_pcie *pcie = to_ls_pcie(pp);
@@ -153,6 +171,10 @@ static void ls_pcie_host_init(struct pci
ls_pcie_clear_multifunction(pcie);
ls_pcie_drop_msg_tlp(pcie);
iowrite32(0, pcie->pp.dbi_base + PCIE_DBI_RO_WR_EN);
+
+ ls_pcie_disable_outbound_atus(pcie);
+ ls_pcie_fix_error_response(pcie);
+ dw_pcie_setup_rc(pp);
}
static int ls_pcie_msi_host_init(struct pcie_port *pp,
@@ -196,20 +218,40 @@ static struct ls_pcie_drvdata ls1021_drv
static struct ls_pcie_drvdata ls1043_drvdata = {
.lut_offset = 0x10000,
.ltssm_shift = 24,
+ .lut_dbg = 0x7fc,
+ .ops = &ls_pcie_host_ops,
+};
+
+static struct ls_pcie_drvdata ls1046_drvdata = {
+ .lut_offset = 0x80000,
+ .ltssm_shift = 24,
+ .lut_dbg = 0x407fc,
.ops = &ls_pcie_host_ops,
};
static struct ls_pcie_drvdata ls2080_drvdata = {
.lut_offset = 0x80000,
.ltssm_shift = 0,
+ .lut_dbg = 0x7fc,
+ .ops = &ls_pcie_host_ops,
+};
+
+static struct ls_pcie_drvdata ls2088_drvdata = {
+ .lut_offset = 0x80000,
+ .ltssm_shift = 0,
+ .lut_dbg = 0x407fc,
.ops = &ls_pcie_host_ops,
};
static const struct of_device_id ls_pcie_of_match[] = {
+ { .compatible = "fsl,ls1012a-pcie", .data = &ls1046_drvdata },
{ .compatible = "fsl,ls1021a-pcie", .data = &ls1021_drvdata },
{ .compatible = "fsl,ls1043a-pcie", .data = &ls1043_drvdata },
+ { .compatible = "fsl,ls1046a-pcie", .data = &ls1046_drvdata },
{ .compatible = "fsl,ls2080a-pcie", .data = &ls2080_drvdata },
{ .compatible = "fsl,ls2085a-pcie", .data = &ls2080_drvdata },
+ { .compatible = "fsl,ls2088a-pcie", .data = &ls2088_drvdata },
+ { .compatible = "fsl,ls1088a-pcie", .data = &ls2088_drvdata },
{ },
};
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -478,6 +478,12 @@ int dw_pcie_wait_for_link(struct pcie_po
return -ETIMEDOUT;
}
+void dw_pcie_disable_outbound_atu(struct pcie_port *pp, int index)
+{
+ dw_pcie_writel_rc(pp, PCIE_ATU_VIEWPORT, PCIE_ATU_REGION_OUTBOUND | index);
+ dw_pcie_writel_rc(pp, PCIE_ATU_CR2, 0);
+}
+
int dw_pcie_link_up(struct pcie_port *pp)
{
u32 val;
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -82,5 +82,6 @@ int dw_pcie_wait_for_link(struct pcie_po
int dw_pcie_link_up(struct pcie_port *pp);
void dw_pcie_setup_rc(struct pcie_port *pp);
int dw_pcie_host_init(struct pcie_port *pp);
+void dw_pcie_disable_outbound_atu(struct pcie_port *pp, int index);
#endif /* _PCIE_DESIGNWARE_H */
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -454,7 +454,7 @@ struct resource *pci_find_parent_resourc
pci_bus_for_each_resource(bus, r, i) {
if (!r)
continue;
- if (res->start && resource_contains(r, res)) {
+ if (resource_contains(r, res)) {
/*
* If the window is prefetchable but the BAR is
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -44,52 +44,30 @@ static void release_pcie_device(struct d
}
/**
- * pcie_port_msix_add_entry - add entry to given array of MSI-X entries
- * @entries: Array of MSI-X entries
- * @new_entry: Index of the entry to add to the array
- * @nr_entries: Number of entries already in the array
+ * pcibios_check_service_irqs - check irqs in the device tree
+ * @dev: PCI Express port to handle
+ * @irqs: Array of irqs to populate
+ * @mask: Bitmask of port capabilities returned by get_port_device_capability()
+ *
+ * Return value: 0 means no service irqs in the device tree
*
- * Return value: Position of the added entry in the array
*/
-static int pcie_port_msix_add_entry(
- struct msix_entry *entries, int new_entry, int nr_entries)
+int __weak pcibios_check_service_irqs(struct pci_dev *dev, int *irqs, int mask)
{
- int j;
-
- for (j = 0; j < nr_entries; j++)
- if (entries[j].entry == new_entry)
- return j;
-
- entries[j].entry = new_entry;
- return j;
+ return 0;
}
/**
* pcie_port_enable_msix - try to set up MSI-X as interrupt mode for given port
* @dev: PCI Express port to handle
- * @vectors: Array of interrupt vectors to populate
+ * @irqs: Array of interrupt vectors to populate
* @mask: Bitmask of port capabilities returned by get_port_device_capability()
*
* Return value: 0 on success, error code on failure
*/
-static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask)
+static int pcie_port_enable_msix(struct pci_dev *dev, int *irqs, int mask)
{
- struct msix_entry *msix_entries;
- int idx[PCIE_PORT_DEVICE_MAXSERVICES];
- int nr_entries, status, pos, i, nvec;
- u16 reg16;
- u32 reg32;
-
- nr_entries = pci_msix_vec_count(dev);
- if (nr_entries < 0)
- return nr_entries;
- BUG_ON(!nr_entries);
- if (nr_entries > PCIE_PORT_MAX_MSIX_ENTRIES)
- nr_entries = PCIE_PORT_MAX_MSIX_ENTRIES;
-
- msix_entries = kzalloc(sizeof(*msix_entries) * nr_entries, GFP_KERNEL);
- if (!msix_entries)
- return -ENOMEM;
+ int nr_entries, entry, nvec = 0;
/*
* Allocate as many entries as the port wants, so that we can check
@@ -97,20 +75,13 @@ static int pcie_port_enable_msix(struct
* equal to the number of entries this port actually uses, we'll happily
* go through without any tricks.
*/
- for (i = 0; i < nr_entries; i++)
- msix_entries[i].entry = i;
-
- status = pci_enable_msix_exact(dev, msix_entries, nr_entries);
- if (status)
- goto Exit;
-
- for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
- idx[i] = -1;
- status = -EIO;
- nvec = 0;
+ nr_entries = pci_alloc_irq_vectors(dev, 1, PCIE_PORT_MAX_MSIX_ENTRIES,
+ PCI_IRQ_MSIX);
+ if (nr_entries < 0)
+ return nr_entries;
if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) {
- int entry;
+ u16 reg16;
/*
* The code below follows the PCI Express Base Specification 2.0
@@ -125,18 +96,16 @@ static int pcie_port_enable_msix(struct
pcie_capability_read_word(dev, PCI_EXP_FLAGS, &reg16);
entry = (reg16 & PCI_EXP_FLAGS_IRQ) >> 9;
if (entry >= nr_entries)
- goto Error;
+ goto out_free_irqs;
- i = pcie_port_msix_add_entry(msix_entries, entry, nvec);
- if (i == nvec)
- nvec++;
+ irqs[PCIE_PORT_SERVICE_PME_SHIFT] = pci_irq_vector(dev, entry);
+ irqs[PCIE_PORT_SERVICE_HP_SHIFT] = pci_irq_vector(dev, entry);
- idx[PCIE_PORT_SERVICE_PME_SHIFT] = i;
- idx[PCIE_PORT_SERVICE_HP_SHIFT] = i;
+ nvec = max(nvec, entry + 1);
}
if (mask & PCIE_PORT_SERVICE_AER) {
- int entry;
+ u32 reg32, pos;
/*
* The code below follows Section 7.10.10 of the PCI Express
@@ -151,13 +120,11 @@ static int pcie_port_enable_msix(struct
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &reg32);
entry = reg32 >> 27;
if (entry >= nr_entries)
- goto Error;
+ goto out_free_irqs;
- i = pcie_port_msix_add_entry(msix_entries, entry, nvec);
- if (i == nvec)
- nvec++;
+ irqs[PCIE_PORT_SERVICE_AER_SHIFT] = pci_irq_vector(dev, entry);
- idx[PCIE_PORT_SERVICE_AER_SHIFT] = i;
+ nvec = max(nvec, entry + 1);
}
/*
@@ -165,41 +132,54 @@ static int pcie_port_enable_msix(struct
* what we have. Otherwise, the port has some extra entries not for the
* services we know and we need to work around that.
*/
- if (nvec == nr_entries) {
- status = 0;
- } else {
+ if (nvec != nr_entries) {
/* Drop the temporary MSI-X setup */
- pci_disable_msix(dev);
+ pci_free_irq_vectors(dev);
/* Now allocate the MSI-X vectors for real */
- status = pci_enable_msix_exact(dev, msix_entries, nvec);
- if (status)
- goto Exit;
+ nr_entries = pci_alloc_irq_vectors(dev, nvec, nvec,
+ PCI_IRQ_MSIX);
+ if (nr_entries < 0)
+ return nr_entries;
}
- for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
- vectors[i] = idx[i] >= 0 ? msix_entries[idx[i]].vector : -1;
-
- Exit:
- kfree(msix_entries);
- return status;
+ return 0;
- Error:
- pci_disable_msix(dev);
- goto Exit;
+out_free_irqs:
+ pci_free_irq_vectors(dev);
+ return -EIO;
}
/**
- * init_service_irqs - initialize irqs for PCI Express port services
+ * pcie_init_service_irqs - initialize irqs for PCI Express port services
* @dev: PCI Express port to handle
* @irqs: Array of irqs to populate
* @mask: Bitmask of port capabilities returned by get_port_device_capability()
*
* Return value: Interrupt mode associated with the port
*/
-static int init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
+static int pcie_init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
{
- int i, irq = -1;
+ unsigned flags = PCI_IRQ_LEGACY | PCI_IRQ_MSI;
+ int ret, i;
+ int irq = -1;
+
+ for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
+ irqs[i] = -1;
+
+ /* Check if some platforms owns independent irq pins for AER/PME etc.
+ * Some platforms may own independent AER/PME interrupts and set
+ * them in the device tree file.
+ */
+ ret = pcibios_check_service_irqs(dev, irqs, mask);
+ if (ret) {
+ if (dev->irq)
+ irq = dev->irq;
+ for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
+ if (irqs[i] == -1 && i != PCIE_PORT_SERVICE_VC_SHIFT)
+ irqs[i] = irq;
+ return 0;
+ }
/*
* If MSI cannot be used for PCIe PME or hotplug, we have to use
@@ -207,41 +187,25 @@ static int init_service_irqs(struct pci_
*/
if (((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) ||
((mask & PCIE_PORT_SERVICE_HP) && pciehp_no_msi())) {
- if (dev->irq)
- irq = dev->irq;
- goto no_msi;
+ flags &= ~PCI_IRQ_MSI;
+ } else {
+ /* Try to use MSI-X if supported */
+ if (!pcie_port_enable_msix(dev, irqs, mask))
+ return 0;
}
- /* Try to use MSI-X if supported */
- if (!pcie_port_enable_msix(dev, irqs, mask))
- return 0;
-
- /*
- * We're not going to use MSI-X, so try MSI and fall back to INTx.
- * If neither MSI/MSI-X nor INTx available, try other interrupt. On
- * some platforms, root port doesn't support MSI/MSI-X/INTx in RC mode.
- */
- if (!pci_enable_msi(dev) || dev->irq)
- irq = dev->irq;
+ ret = pci_alloc_irq_vectors(dev, 1, 1, flags);
+ if (ret < 0)
+ return -ENODEV;
- no_msi:
- for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
- irqs[i] = irq;
- irqs[PCIE_PORT_SERVICE_VC_SHIFT] = -1;
+ for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
+ if (i != PCIE_PORT_SERVICE_VC_SHIFT)
+ irqs[i] = pci_irq_vector(dev, 0);
+ }
- if (irq < 0)
- return -ENODEV;
return 0;
}
-static void cleanup_service_irqs(struct pci_dev *dev)
-{
- if (dev->msix_enabled)
- pci_disable_msix(dev);
- else if (dev->msi_enabled)
- pci_disable_msi(dev);
-}
-
/**
* get_port_device_capability - discover capabilities of a PCI Express port
* @dev: PCI Express port to examine
@@ -378,7 +342,7 @@ int pcie_port_device_register(struct pci
* that can be used in the absence of irqs. Allow them to determine
* if that is to be used.
*/
- status = init_service_irqs(dev, irqs, capabilities);
+ status = pcie_init_service_irqs(dev, irqs, capabilities);
if (status) {
capabilities &= PCIE_PORT_SERVICE_VC | PCIE_PORT_SERVICE_HP;
if (!capabilities)
@@ -401,7 +365,7 @@ int pcie_port_device_register(struct pci
return 0;
error_cleanup_irqs:
- cleanup_service_irqs(dev);
+ pci_free_irq_vectors(dev);
error_disable:
pci_disable_device(dev);
return status;
@@ -469,7 +433,7 @@ static int remove_iter(struct device *de
void pcie_port_device_remove(struct pci_dev *dev)
{
device_for_each_child(&dev->dev, NULL, remove_iter);
- cleanup_service_irqs(dev);
+ pci_free_irq_vectors(dev);
pci_disable_device(dev);
}
@@ -499,7 +463,6 @@ static int pcie_port_probe_service(struc
if (status)
return status;
- dev_printk(KERN_DEBUG, dev, "service driver %s loaded\n", driver->name);
get_device(dev);
return 0;
}
@@ -524,8 +487,6 @@ static int pcie_port_remove_service(stru
pciedev = to_pcie_device(dev);
driver = to_service_driver(dev->driver);
if (driver && driver->remove) {
- dev_printk(KERN_DEBUG, dev, "unloading service driver %s\n",
- driver->name);
driver->remove(pciedev);
put_device(dev);
}
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4679,3 +4679,11 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_IN
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2031, quirk_no_aersid);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2032, quirk_no_aersid);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2033, quirk_no_aersid);
+
+/* Freescale PCIe doesn't support MSI in RC mode */
+static void quirk_fsl_no_msi(struct pci_dev *pdev)
+{
+ if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT)
+ pdev->no_msi = 1;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, quirk_fsl_no_msi);
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1823,6 +1823,7 @@ void pcibios_release_device(struct pci_d
void pcibios_penalize_isa_irq(int irq, int active);
int pcibios_alloc_irq(struct pci_dev *dev);
void pcibios_free_irq(struct pci_dev *dev);
+int pcibios_check_service_irqs(struct pci_dev *dev, int *irqs, int mask);
#ifdef CONFIG_HIBERNATE_CALLBACKS
extern struct dev_pm_ops pcibios_pm_ops;
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