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Merge branches 'pci/host-designware', 'pci/host-designware-common', 'pci/host-generic', 'pci/host-imx6', 'pci/host-iproc' and 'pci/host-xgene' into next

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* pci/host-designware:
  PCI: designware: Use iATU0 for cfg and IO, iATU1 for MEM
  PCI: designware: Consolidate outbound iATU programming functions
  PCI: designware: Add support for x8 links

* pci/host-designware-common:
  PCI: designware: Wait for link to come up with consistent style
  PCI: layerscape: Factor out ls_pcie_establish_link()
  PCI: layerscape: Use dw_pcie_link_up() consistently
  PCI: dra7xx: Use dw_pcie_link_up() consistently
  PCI: imx6: Rename imx6_pcie_start_link() to imx6_pcie_establish_link()

* pci/host-generic:
  of/pci: Fix pci_address_to_pio() conversion of CPU address to I/O port

* pci/host-imx6:
  PCI: imx6: Add #define PCIE_RC_LCSR
  PCI: imx6: Use "u32", not "uint32_t"
  PCI: imx6: Add speed change timeout message

* pci/host-iproc:
  PCI: iproc: Free resource list after registration
  PCI: iproc: Directly add PCI resources
  PCI: iproc: Add BCMA PCIe driver
  PCI: iproc: Allow override of device tree IRQ mapping function

* pci/host-xgene:
  arm64: dts: Add APM X-Gene PCIe MSI nodes
  PCI: xgene: Add APM X-Gene v1 PCIe MSI/MSIX termination driver
This commit is contained in:
Bjorn Helgaas 2015-06-16 08:19:55 -05:00
commit bf933dbb84
19 changed files with 1033 additions and 192 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
Documentation/devicetree/bindings/pci/xgene-pci-msi.txt Normal file
View File

@ -0,0 +1,68 @@
* AppliedMicro X-Gene v1 PCIe MSI controller
Required properties:
- compatible: should be "apm,xgene1-msi" to identify
X-Gene v1 PCIe MSI controller block.
- msi-controller: indicates that this is X-Gene v1 PCIe MSI controller node
- reg: physical base address (0x79000000) and length (0x900000) for controller
registers. These registers include the MSI termination address and data
registers as well as the MSI interrupt status registers.
- reg-names: not required
- interrupts: A list of 16 interrupt outputs of the controller, starting from
interrupt number 0x10 to 0x1f.
- interrupt-names: not required
Each PCIe node needs to have property msi-parent that points to msi controller node
Examples:
SoC DTSI:
+ MSI node:
msi@79000000 {
compatible = "apm,xgene1-msi";
msi-controller;
reg = <0x00 0x79000000 0x0 0x900000>;
interrupts = <0x0 0x10 0x4>
<0x0 0x11 0x4>
<0x0 0x12 0x4>
<0x0 0x13 0x4>
<0x0 0x14 0x4>
<0x0 0x15 0x4>
<0x0 0x16 0x4>
<0x0 0x17 0x4>
<0x0 0x18 0x4>
<0x0 0x19 0x4>
<0x0 0x1a 0x4>
<0x0 0x1b 0x4>
<0x0 0x1c 0x4>
<0x0 0x1d 0x4>
<0x0 0x1e 0x4>
<0x0 0x1f 0x4>;
};
+ PCIe controller node with msi-parent property pointing to MSI node:
pcie0: pcie@1f2b0000 {
status = "disabled";
device_type = "pci";
compatible = "apm,xgene-storm-pcie", "apm,xgene-pcie";
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
reg = < 0x00 0x1f2b0000 0x0 0x00010000 /* Controller registers */
0xe0 0xd0000000 0x0 0x00040000>; /* PCI config space */
reg-names = "csr", "cfg";
ranges = <0x01000000 0x00 0x00000000 0xe0 0x10000000 0x00 0x00010000 /* io */
0x02000000 0x00 0x80000000 0xe1 0x80000000 0x00 0x80000000>; /* mem */
dma-ranges = <0x42000000 0x80 0x00000000 0x80 0x00000000 0x00 0x80000000
0x42000000 0x00 0x00000000 0x00 0x00000000 0x80 0x00000000>;
interrupt-map-mask = <0x0 0x0 0x0 0x7>;
interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0xc2 0x1
0x0 0x0 0x0 0x2 &gic 0x0 0xc3 0x1
0x0 0x0 0x0 0x3 &gic 0x0 0xc4 0x1
0x0 0x0 0x0 0x4 &gic 0x0 0xc5 0x1>;
dma-coherent;
clocks = <&pcie0clk 0>;
msi-parent= <&msi>;
};

8
MAINTAINERS
View File

@ -7564,6 +7564,14 @@ L: linux-pci@vger.kernel.org
S: Orphan
F: drivers/pci/host/*spear*
PCI MSI DRIVER FOR APPLIEDMICRO XGENE
M: Duc Dang <dhdang@apm.com>
L: linux-pci@vger.kernel.org
L: linux-arm-kernel@lists.infradead.org
S: Maintained
F: Documentation/devicetree/bindings/pci/xgene-pci-msi.txt
F: drivers/pci/host/pci-xgene-msi.c
PCMCIA SUBSYSTEM
P: Linux PCMCIA Team
L: linux-pcmcia@lists.infradead.org

27
arch/arm64/boot/dts/apm/apm-storm.dtsi
View File

@ -374,6 +374,28 @@ dmaclk: dmaclk@1f27c000 {
};
};
msi: msi@79000000 {
compatible = "apm,xgene1-msi";
msi-controller;
reg = <0x00 0x79000000 0x0 0x900000>;
interrupts = < 0x0 0x10 0x4
0x0 0x11 0x4
0x0 0x12 0x4
0x0 0x13 0x4
0x0 0x14 0x4
0x0 0x15 0x4
0x0 0x16 0x4
0x0 0x17 0x4
0x0 0x18 0x4
0x0 0x19 0x4
0x0 0x1a 0x4
0x0 0x1b 0x4
0x0 0x1c 0x4
0x0 0x1d 0x4
0x0 0x1e 0x4
0x0 0x1f 0x4>;
};
pcie0: pcie@1f2b0000 {
status = "disabled";
device_type = "pci";
@ -395,6 +417,7 @@ pcie0: pcie@1f2b0000 {
0x0 0x0 0x0 0x4 &gic 0x0 0xc5 0x1>;
dma-coherent;
clocks = <&pcie0clk 0>;
msi-parent = <&msi>;
};
pcie1: pcie@1f2c0000 {
@ -418,6 +441,7 @@ pcie1: pcie@1f2c0000 {
0x0 0x0 0x0 0x4 &gic 0x0 0xcb 0x1>;
dma-coherent;
clocks = <&pcie1clk 0>;
msi-parent = <&msi>;
};
pcie2: pcie@1f2d0000 {
@ -441,6 +465,7 @@ pcie2: pcie@1f2d0000 {
0x0 0x0 0x0 0x4 &gic 0x0 0xd1 0x1>;
dma-coherent;
clocks = <&pcie2clk 0>;
msi-parent = <&msi>;
};
pcie3: pcie@1f500000 {
@ -464,6 +489,7 @@ pcie3: pcie@1f500000 {
0x0 0x0 0x0 0x4 &gic 0x0 0xd7 0x1>;
dma-coherent;
clocks = <&pcie3clk 0>;
msi-parent = <&msi>;
};
pcie4: pcie@1f510000 {
@ -487,6 +513,7 @@ pcie4: pcie@1f510000 {
0x0 0x0 0x0 0x4 &gic 0x0 0xdd 0x1>;
dma-coherent;
clocks = <&pcie4clk 0>;
msi-parent = <&msi>;
};
serial0: serial@1c020000 {

2
drivers/of/address.c
View File

@ -765,7 +765,7 @@ unsigned long __weak pci_address_to_pio(phys_addr_t address)
spin_lock(&io_range_lock);
list_for_each_entry(res, &io_range_list, list) {
if (address >= res->start && address < res->start + res->size) {
addr = res->start - address + offset;
addr = address - res->start + offset;
break;
}
offset += res->size;

20
drivers/pci/host/Kconfig
View File

@ -89,11 +89,20 @@ config PCI_XGENE
depends on ARCH_XGENE
depends on OF
select PCIEPORTBUS
select PCI_MSI_IRQ_DOMAIN if PCI_MSI
help
Say Y here if you want internal PCI support on APM X-Gene SoC.
There are 5 internal PCIe ports available. Each port is GEN3 capable
and have varied lanes from x1 to x8.
config PCI_XGENE_MSI
bool "X-Gene v1 PCIe MSI feature"
depends on PCI_XGENE && PCI_MSI
default y
help
Say Y here if you want PCIe MSI support for the APM X-Gene v1 SoC.
This MSI driver supports 5 PCIe ports on the APM X-Gene v1 SoC.
config PCI_LAYERSCAPE
bool "Freescale Layerscape PCIe controller"
depends on OF && ARM
@ -125,4 +134,15 @@ config PCIE_IPROC_PLATFORM
Say Y here if you want to use the Broadcom iProc PCIe controller
through the generic platform bus interface
config PCIE_IPROC_BCMA
bool "Broadcom iProc PCIe BCMA bus driver"
depends on ARCH_BCM_IPROC || (ARM && COMPILE_TEST)
select PCIE_IPROC
select BCMA
select PCI_DOMAINS
default ARCH_BCM_5301X
help
Say Y here if you want to use the Broadcom iProc PCIe controller
through the BCMA bus interface
endmenu

2
drivers/pci/host/Makefile
View File

@ -11,7 +11,9 @@ obj-$(CONFIG_PCIE_SPEAR13XX) += pcie-spear13xx.o
obj-$(CONFIG_PCI_KEYSTONE) += pci-keystone-dw.o pci-keystone.o
obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
obj-$(CONFIG_PCI_XGENE_MSI) += pci-xgene-msi.o
obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o
obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o
obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o

19
drivers/pci/host/pci-dra7xx.c
View File

@ -93,9 +93,9 @@ static int dra7xx_pcie_link_up(struct pcie_port *pp)
static int dra7xx_pcie_establish_link(struct pcie_port *pp)
{
u32 reg;
unsigned int retries = 1000;
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pp);
u32 reg;
unsigned int retries;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "link is already up\n");
@ -106,19 +106,14 @@ static int dra7xx_pcie_establish_link(struct pcie_port *pp)
reg |= LTSSM_EN;
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD, reg);
while (retries--) {
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_PHY_CS);
if (reg & LINK_UP)
break;
for (retries = 0; retries < 1000; retries++) {
if (dw_pcie_link_up(pp))
return 0;
usleep_range(10, 20);
}
if (retries == 0) {
dev_err(pp->dev, "link is not up\n");
return -ETIMEDOUT;
}
return 0;
dev_err(pp->dev, "link is not up\n");
return -EINVAL;
}
static void dra7xx_pcie_enable_interrupts(struct pcie_port *pp)

34
drivers/pci/host/pci-exynos.c
View File

@ -316,9 +316,9 @@ static void exynos_pcie_assert_reset(struct pcie_port *pp)
static int exynos_pcie_establish_link(struct pcie_port *pp)
{
u32 val;
int count = 0;
struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp);
u32 val;
unsigned int retries;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "Link already up\n");
@ -357,27 +357,23 @@ static int exynos_pcie_establish_link(struct pcie_port *pp)
PCIE_APP_LTSSM_ENABLE);
/* check if the link is up or not */
while (!dw_pcie_link_up(pp)) {
mdelay(100);
count++;
if (count == 10) {
while (exynos_phy_readl(exynos_pcie,
PCIE_PHY_PLL_LOCKED) == 0) {
val = exynos_blk_readl(exynos_pcie,
PCIE_PHY_PLL_LOCKED);
dev_info(pp->dev, "PLL Locked: 0x%x\n", val);
}
/* power off phy */
exynos_pcie_power_off_phy(pp);
dev_err(pp->dev, "PCIe Link Fail\n");
return -EINVAL;
for (retries = 0; retries < 10; retries++) {
if (dw_pcie_link_up(pp)) {
dev_info(pp->dev, "Link up\n");
return 0;
}
mdelay(100);
}
dev_info(pp->dev, "Link up\n");
while (exynos_phy_readl(exynos_pcie, PCIE_PHY_PLL_LOCKED) == 0) {
val = exynos_blk_readl(exynos_pcie, PCIE_PHY_PLL_LOCKED);
dev_info(pp->dev, "PLL Locked: 0x%x\n", val);
}
/* power off phy */
exynos_pcie_power_off_phy(pp);
return 0;
dev_err(pp->dev, "PCIe Link Fail\n");
return -EINVAL;
}
static void exynos_pcie_clear_irq_pulse(struct pcie_port *pp)

88
drivers/pci/host/pci-imx6.c
View File

@ -47,6 +47,8 @@ struct imx6_pcie {
#define PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN2 0x2
#define PCIE_RC_LCR_MAX_LINK_SPEEDS_MASK 0xf
#define PCIE_RC_LCSR 0x80
/* PCIe Port Logic registers (memory-mapped) */
#define PL_OFFSET 0x700
#define PCIE_PL_PFLR (PL_OFFSET + 0x08)
@ -335,21 +337,36 @@ static void imx6_pcie_init_phy(struct pcie_port *pp)
static int imx6_pcie_wait_for_link(struct pcie_port *pp)
{
int count = 200;
unsigned int retries;
while (!dw_pcie_link_up(pp)) {
for (retries = 0; retries < 200; retries++) {
if (dw_pcie_link_up(pp))
return 0;
usleep_range(100, 1000);
if (--count)
continue;
dev_err(pp->dev, "phy link never came up\n");
dev_dbg(pp->dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
readl(pp->dbi_base + PCIE_PHY_DEBUG_R0),
readl(pp->dbi_base + PCIE_PHY_DEBUG_R1));
return -EINVAL;
}
return 0;
dev_err(pp->dev, "phy link never came up\n");
dev_dbg(pp->dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n",
readl(pp->dbi_base + PCIE_PHY_DEBUG_R0),
readl(pp->dbi_base + PCIE_PHY_DEBUG_R1));
return -EINVAL;
}
static int imx6_pcie_wait_for_speed_change(struct pcie_port *pp)
{
u32 tmp;
unsigned int retries;
for (retries = 0; retries < 200; retries++) {
tmp = readl(pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
/* Test if the speed change finished. */
if (!(tmp & PORT_LOGIC_SPEED_CHANGE))
return 0;
usleep_range(100, 1000);
}
dev_err(pp->dev, "Speed change timeout\n");
return -EINVAL;
}
static irqreturn_t imx6_pcie_msi_handler(int irq, void *arg)
@ -359,11 +376,11 @@ static irqreturn_t imx6_pcie_msi_handler(int irq, void *arg)
return dw_handle_msi_irq(pp);
}
static int imx6_pcie_start_link(struct pcie_port *pp)
static int imx6_pcie_establish_link(struct pcie_port *pp)
{
struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp);
uint32_t tmp;
int ret, count;
u32 tmp;
int ret;
/*
* Force Gen1 operation when starting the link. In case the link is
@ -397,29 +414,22 @@ static int imx6_pcie_start_link(struct pcie_port *pp)
tmp |= PORT_LOGIC_SPEED_CHANGE;
writel(tmp, pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
count = 200;
while (count--) {
tmp = readl(pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
/* Test if the speed change finished. */
if (!(tmp & PORT_LOGIC_SPEED_CHANGE))
break;
usleep_range(100, 1000);
ret = imx6_pcie_wait_for_speed_change(pp);
if (ret) {
dev_err(pp->dev, "Failed to bring link up!\n");
return ret;
}
/* Make sure link training is finished as well! */
if (count)
ret = imx6_pcie_wait_for_link(pp);
else
ret = -EINVAL;
ret = imx6_pcie_wait_for_link(pp);
if (ret) {
dev_err(pp->dev, "Failed to bring link up!\n");
} else {
tmp = readl(pp->dbi_base + 0x80);
dev_dbg(pp->dev, "Link up, Gen=%i\n", (tmp >> 16) & 0xf);
return ret;
}
return ret;
tmp = readl(pp->dbi_base + PCIE_RC_LCSR);
dev_dbg(pp->dev, "Link up, Gen=%i\n", (tmp >> 16) & 0xf);
return 0;
}
static void imx6_pcie_host_init(struct pcie_port *pp)
@ -432,7 +442,7 @@ static void imx6_pcie_host_init(struct pcie_port *pp)
dw_pcie_setup_rc(pp);
imx6_pcie_start_link(pp);
imx6_pcie_establish_link(pp);
if (IS_ENABLED(CONFIG_PCI_MSI))
dw_pcie_msi_init(pp);
@ -440,19 +450,19 @@ static void imx6_pcie_host_init(struct pcie_port *pp)
static void imx6_pcie_reset_phy(struct pcie_port *pp)
{
uint32_t temp;
u32 tmp;
pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &temp);
temp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN |
PHY_RX_OVRD_IN_LO_RX_PLL_EN);
pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, temp);
pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &tmp);
tmp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN |
PHY_RX_OVRD_IN_LO_RX_PLL_EN);
pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, tmp);
usleep_range(2000, 3000);
pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &temp);
temp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN |
pcie_phy_read(pp->dbi_base, PHY_RX_OVRD_IN_LO, &tmp);
tmp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN |
PHY_RX_OVRD_IN_LO_RX_PLL_EN);
pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, temp);
pcie_phy_write(pp->dbi_base, PHY_RX_OVRD_IN_LO, tmp);
}
static int imx6_pcie_link_up(struct pcie_port *pp)

16
drivers/pci/host/pci-keystone.c
View File

@ -88,7 +88,7 @@ DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, quirk_limit_mrrs);
static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
{
struct pcie_port *pp = &ks_pcie->pp;
int count = 200;
unsigned int retries;
dw_pcie_setup_rc(pp);
@ -99,17 +99,15 @@ static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
ks_dw_pcie_initiate_link_train(ks_pcie);
/* check if the link is up or not */
while (!dw_pcie_link_up(pp)) {
for (retries = 0; retries < 200; retries++) {
if (dw_pcie_link_up(pp))
return 0;
usleep_range(100, 1000);
if (--count) {
ks_dw_pcie_initiate_link_train(ks_pcie);
continue;
}
dev_err(pp->dev, "phy link never came up\n");
return -EINVAL;
ks_dw_pcie_initiate_link_train(ks_pcie);
}
return 0;
dev_err(pp->dev, "phy link never came up\n");
return -EINVAL;
}
static void ks_pcie_msi_irq_handler(unsigned int irq, struct irq_desc *desc)

25
drivers/pci/host/pci-layerscape.c
View File

@ -62,22 +62,27 @@ static int ls_pcie_link_up(struct pcie_port *pp)
return 1;
}
static int ls_pcie_establish_link(struct pcie_port *pp)
{
unsigned int retries;
for (retries = 0; retries < 200; retries++) {
if (dw_pcie_link_up(pp))
return 0;
usleep_range(100, 1000);
}
dev_err(pp->dev, "phy link never came up\n");
return -EINVAL;
}
static void ls_pcie_host_init(struct pcie_port *pp)
{
struct ls_pcie *pcie = to_ls_pcie(pp);
int count = 0;
u32 val;
dw_pcie_setup_rc(pp);
while (!ls_pcie_link_up(pp)) {
usleep_range(100, 1000);
count++;
if (count >= 200) {
dev_err(pp->dev, "phy link never came up\n");
return;
}
}
ls_pcie_establish_link(pp);
/*
* LS1021A Workaround for internal TKT228622

596
drivers/pci/host/pci-xgene-msi.c Normal file
View File

@ -0,0 +1,596 @@
/*
* APM X-Gene MSI Driver
*
* Copyright (c) 2014, Applied Micro Circuits Corporation
* Author: Tanmay Inamdar <tinamdar@apm.com>
* Duc Dang <dhdang@apm.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/cpu.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/msi.h>
#include <linux/of_irq.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/of_pci.h>
#define MSI_IR0 0x000000
#define MSI_INT0 0x800000
#define IDX_PER_GROUP 8
#define IRQS_PER_IDX 16
#define NR_HW_IRQS 16
#define NR_MSI_VEC (IDX_PER_GROUP * IRQS_PER_IDX * NR_HW_IRQS)
struct xgene_msi_group {
struct xgene_msi *msi;
int gic_irq;
u32 msi_grp;
};
struct xgene_msi {
struct device_node *node;
struct msi_controller mchip;
struct irq_domain *domain;
u64 msi_addr;
void __iomem *msi_regs;
unsigned long *bitmap;
struct mutex bitmap_lock;
struct xgene_msi_group *msi_groups;
int num_cpus;
};
/* Global data */
static struct xgene_msi xgene_msi_ctrl;
static struct irq_chip xgene_msi_top_irq_chip = {
.name = "X-Gene1 MSI",
.irq_enable = pci_msi_unmask_irq,
.irq_disable = pci_msi_mask_irq,
.irq_mask = pci_msi_mask_irq,
.irq_unmask = pci_msi_unmask_irq,
};
static struct msi_domain_info xgene_msi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
MSI_FLAG_PCI_MSIX),
.chip = &xgene_msi_top_irq_chip,
};
/*
* X-Gene v1 has 16 groups of MSI termination registers MSInIRx, where
* n is group number (0..F), x is index of registers in each group (0..7)
* The register layout is as follows:
* MSI0IR0 base_addr
* MSI0IR1 base_addr + 0x10000
* ... ...
* MSI0IR6 base_addr + 0x60000
* MSI0IR7 base_addr + 0x70000
* MSI1IR0 base_addr + 0x80000
* MSI1IR1 base_addr + 0x90000
* ... ...
* MSI1IR7 base_addr + 0xF0000
* MSI2IR0 base_addr + 0x100000
* ... ...
* MSIFIR0 base_addr + 0x780000
* MSIFIR1 base_addr + 0x790000
* ... ...
* MSIFIR7 base_addr + 0x7F0000
* MSIINT0 base_addr + 0x800000
* MSIINT1 base_addr + 0x810000
* ... ...
* MSIINTF base_addr + 0x8F0000
*
* Each index register supports 16 MSI vectors (0..15) to generate interrupt.
* There are total 16 GIC IRQs assigned for these 16 groups of MSI termination
* registers.
*
* Each MSI termination group has 1 MSIINTn register (n is 0..15) to indicate
* the MSI pending status caused by 1 of its 8 index registers.
*/
/* MSInIRx read helper */
static u32 xgene_msi_ir_read(struct xgene_msi *msi,
u32 msi_grp, u32 msir_idx)
{
return readl_relaxed(msi->msi_regs + MSI_IR0 +
(msi_grp << 19) + (msir_idx << 16));
}
/* MSIINTn read helper */
static u32 xgene_msi_int_read(struct xgene_msi *msi, u32 msi_grp)
{
return readl_relaxed(msi->msi_regs + MSI_INT0 + (msi_grp << 16));
}
/*
* With 2048 MSI vectors supported, the MSI message can be constructed using
* following scheme:
* - Divide into 8 256-vector groups
* Group 0: 0-255
* Group 1: 256-511
* Group 2: 512-767
* ...
* Group 7: 1792-2047
* - Each 256-vector group is divided into 16 16-vector groups
* As an example: 16 16-vector groups for 256-vector group 0-255 is
* Group 0: 0-15
* Group 1: 16-32
* ...
* Group 15: 240-255
* - The termination address of MSI vector in 256-vector group n and 16-vector
* group x is the address of MSIxIRn
* - The data for MSI vector in 16-vector group x is x
*/
static u32 hwirq_to_reg_set(unsigned long hwirq)
{
return (hwirq / (NR_HW_IRQS * IRQS_PER_IDX));
}
static u32 hwirq_to_group(unsigned long hwirq)
{
return (hwirq % NR_HW_IRQS);
}
static u32 hwirq_to_msi_data(unsigned long hwirq)
{
return ((hwirq / NR_HW_IRQS) % IRQS_PER_IDX);
}
static void xgene_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
{
struct xgene_msi *msi = irq_data_get_irq_chip_data(data);
u32 reg_set = hwirq_to_reg_set(data->hwirq);
u32 group = hwirq_to_group(data->hwirq);
u64 target_addr = msi->msi_addr + (((8 * group) + reg_set) << 16);
msg->address_hi = upper_32_bits(target_addr);
msg->address_lo = lower_32_bits(target_addr);
msg->data = hwirq_to_msi_data(data->hwirq);
}
/*
* X-Gene v1 only has 16 MSI GIC IRQs for 2048 MSI vectors. To maintain
* the expected behaviour of .set_affinity for each MSI interrupt, the 16
* MSI GIC IRQs are statically allocated to 8 X-Gene v1 cores (2 GIC IRQs
* for each core). The MSI vector is moved fom 1 MSI GIC IRQ to another
* MSI GIC IRQ to steer its MSI interrupt to correct X-Gene v1 core. As a
* consequence, the total MSI vectors that X-Gene v1 supports will be
* reduced to 256 (2048/8) vectors.
*/
static int hwirq_to_cpu(unsigned long hwirq)
{
return (hwirq % xgene_msi_ctrl.num_cpus);
}
static unsigned long hwirq_to_canonical_hwirq(unsigned long hwirq)
{
return (hwirq - hwirq_to_cpu(hwirq));
}
static int xgene_msi_set_affinity(struct irq_data *irqdata,
const struct cpumask *mask, bool force)
{
int target_cpu = cpumask_first(mask);
int curr_cpu;
curr_cpu = hwirq_to_cpu(irqdata->hwirq);
if (curr_cpu == target_cpu)
return IRQ_SET_MASK_OK_DONE;
/* Update MSI number to target the new CPU */
irqdata->hwirq = hwirq_to_canonical_hwirq(irqdata->hwirq) + target_cpu;
return IRQ_SET_MASK_OK;
}
static struct irq_chip xgene_msi_bottom_irq_chip = {
.name = "MSI",
.irq_set_affinity = xgene_msi_set_affinity,
.irq_compose_msi_msg = xgene_compose_msi_msg,
};
static int xgene_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *args)
{
struct xgene_msi *msi = domain->host_data;
int msi_irq;
mutex_lock(&msi->bitmap_lock);
msi_irq = bitmap_find_next_zero_area(msi->bitmap, NR_MSI_VEC, 0,
msi->num_cpus, 0);
if (msi_irq < NR_MSI_VEC)
bitmap_set(msi->bitmap, msi_irq, msi->num_cpus);
else
msi_irq = -ENOSPC;
mutex_unlock(&msi->bitmap_lock);
if (msi_irq < 0)
return msi_irq;
irq_domain_set_info(domain, virq, msi_irq,
&xgene_msi_bottom_irq_chip, domain->host_data,
handle_simple_irq, NULL, NULL);
set_irq_flags(virq, IRQF_VALID);
return 0;
}
static void xgene_irq_domain_free(struct irq_domain *domain,
unsigned int virq, unsigned int nr_irqs)
{
struct irq_data *d = irq_domain_get_irq_data(domain, virq);
struct xgene_msi *msi = irq_data_get_irq_chip_data(d);
u32 hwirq;
mutex_lock(&msi->bitmap_lock);
hwirq = hwirq_to_canonical_hwirq(d->hwirq);
bitmap_clear(msi->bitmap, hwirq, msi->num_cpus);
mutex_unlock(&msi->bitmap_lock);
irq_domain_free_irqs_parent(domain, virq, nr_irqs);
}
static const struct irq_domain_ops msi_domain_ops = {
.alloc = xgene_irq_domain_alloc,
.free = xgene_irq_domain_free,
};
static int xgene_allocate_domains(struct xgene_msi *msi)
{
msi->domain = irq_domain_add_linear(NULL, NR_MSI_VEC,
&msi_domain_ops, msi);
if (!msi->domain)
return -ENOMEM;
msi->mchip.domain = pci_msi_create_irq_domain(msi->mchip.of_node,
&xgene_msi_domain_info,
msi->domain);
if (!msi->mchip.domain) {
irq_domain_remove(msi->domain);
return -ENOMEM;
}
return 0;
}
static void xgene_free_domains(struct xgene_msi *msi)
{
if (msi->mchip.domain)
irq_domain_remove(msi->mchip.domain);
if (msi->domain)
irq_domain_remove(msi->domain);
}
static int xgene_msi_init_allocator(struct xgene_msi *xgene_msi)
{
int size = BITS_TO_LONGS(NR_MSI_VEC) * sizeof(long);
xgene_msi->bitmap = kzalloc(size, GFP_KERNEL);
if (!xgene_msi->bitmap)
return -ENOMEM;
mutex_init(&xgene_msi->bitmap_lock);
xgene_msi->msi_groups = kcalloc(NR_HW_IRQS,
sizeof(struct xgene_msi_group),
GFP_KERNEL);
if (!xgene_msi->msi_groups)
return -ENOMEM;
return 0;
}
static void xgene_msi_isr(unsigned int irq, struct irq_desc *desc)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
struct xgene_msi_group *msi_groups;
struct xgene_msi *xgene_msi;
unsigned int virq;
int msir_index, msir_val, hw_irq;
u32 intr_index, grp_select, msi_grp;
chained_irq_enter(chip, desc);
msi_groups = irq_desc_get_handler_data(desc);
xgene_msi = msi_groups->msi;
msi_grp = msi_groups->msi_grp;
/*
* MSIINTn (n is 0..F) indicates if there is a pending MSI interrupt
* If bit x of this register is set (x is 0..7), one or more interupts
* corresponding to MSInIRx is set.
*/
grp_select = xgene_msi_int_read(xgene_msi, msi_grp);
while (grp_select) {
msir_index = ffs(grp_select) - 1;
/*
* Calculate MSInIRx address to read to check for interrupts
* (refer to termination address and data assignment
* described in xgene_compose_msi_msg() )
*/
msir_val = xgene_msi_ir_read(xgene_msi, msi_grp, msir_index);
while (msir_val) {
intr_index = ffs(msir_val) - 1;
/*
* Calculate MSI vector number (refer to the termination
* address and data assignment described in
* xgene_compose_msi_msg function)
*/
hw_irq = (((msir_index * IRQS_PER_IDX) + intr_index) *
NR_HW_IRQS) + msi_grp;
/*
* As we have multiple hw_irq that maps to single MSI,
* always look up the virq using the hw_irq as seen from
* CPU0
*/
hw_irq = hwirq_to_canonical_hwirq(hw_irq);
virq = irq_find_mapping(xgene_msi->domain, hw_irq);
WARN_ON(!virq);
if (virq != 0)
generic_handle_irq(virq);
msir_val &= ~(1 << intr_index);
}
grp_select &= ~(1 << msir_index);
if (!grp_select) {
/*
* We handled all interrupts happened in this group,
* resample this group MSI_INTx register in case
* something else has been made pending in the meantime
*/
grp_select = xgene_msi_int_read(xgene_msi, msi_grp);
}
}
chained_irq_exit(chip, desc);
}
static int xgene_msi_remove(struct platform_device *pdev)
{
int virq, i;
struct xgene_msi *msi = platform_get_drvdata(pdev);
for (i = 0; i < NR_HW_IRQS; i++) {
virq = msi->msi_groups[i].gic_irq;
if (virq != 0) {
irq_set_chained_handler(virq, NULL);
irq_set_handler_data(virq, NULL);
}
}
kfree(msi->msi_groups);
kfree(msi->bitmap);
msi->bitmap = NULL;
xgene_free_domains(msi);
return 0;
}
static int xgene_msi_hwirq_alloc(unsigned int cpu)
{
struct xgene_msi *msi = &xgene_msi_ctrl;
struct xgene_msi_group *msi_group;
cpumask_var_t mask;
int i;
int err;
for (i = cpu; i < NR_HW_IRQS; i += msi->num_cpus) {
msi_group = &msi->msi_groups[i];
if (!msi_group->gic_irq)
continue;
irq_set_chained_handler(msi_group->gic_irq,
xgene_msi_isr);
err = irq_set_handler_data(msi_group->gic_irq, msi_group);
if (err) {
pr_err("failed to register GIC IRQ handler\n");
return -EINVAL;
}
/*
* Statically allocate MSI GIC IRQs to each CPU core.
* With 8-core X-Gene v1, 2 MSI GIC IRQs are allocated
* to each core.
*/
if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
cpumask_clear(mask);
cpumask_set_cpu(cpu, mask);
err = irq_set_affinity(msi_group->gic_irq, mask);
if (err)
pr_err("failed to set affinity for GIC IRQ");
free_cpumask_var(mask);
} else {
pr_err("failed to alloc CPU mask for affinity\n");
err = -EINVAL;
}
if (err) {
irq_set_chained_handler(msi_group->gic_irq, NULL);
irq_set_handler_data(msi_group->gic_irq, NULL);
return err;
}
}
return 0;
}
static void xgene_msi_hwirq_free(unsigned int cpu)
{
struct xgene_msi *msi = &xgene_msi_ctrl;
struct xgene_msi_group *msi_group;
int i;
for (i = cpu; i < NR_HW_IRQS; i += msi->num_cpus) {
msi_group = &msi->msi_groups[i];
if (!msi_group->gic_irq)
continue;
irq_set_chained_handler(msi_group->gic_irq, NULL);
irq_set_handler_data(msi_group->gic_irq, NULL);
}
}
static int xgene_msi_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned cpu = (unsigned long)hcpu;
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
xgene_msi_hwirq_alloc(cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
xgene_msi_hwirq_free(cpu);
break;
default:
break;
}
return NOTIFY_OK;
}
static struct notifier_block xgene_msi_cpu_notifier = {
.notifier_call = xgene_msi_cpu_callback,
};
static const struct of_device_id xgene_msi_match_table[] = {
{.compatible = "apm,xgene1-msi"},
{},
};
static int xgene_msi_probe(struct platform_device *pdev)
{
struct resource *res;
int rc, irq_index;
struct xgene_msi *xgene_msi;
unsigned int cpu;
int virt_msir;
u32 msi_val, msi_idx;
xgene_msi = &xgene_msi_ctrl;
platform_set_drvdata(pdev, xgene_msi);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
xgene_msi->msi_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(xgene_msi->msi_regs)) {
dev_err(&pdev->dev, "no reg space\n");
rc = -EINVAL;
goto error;
}
xgene_msi->msi_addr = res->start;
xgene_msi->num_cpus = num_possible_cpus();
rc = xgene_msi_init_allocator(xgene_msi);
if (rc) {
dev_err(&pdev->dev, "Error allocating MSI bitmap\n");
goto error;
}
rc = xgene_allocate_domains(xgene_msi);
if (rc) {
dev_err(&pdev->dev, "Failed to allocate MSI domain\n");
goto error;
}
for (irq_index = 0; irq_index < NR_HW_IRQS; irq_index++) {
virt_msir = platform_get_irq(pdev, irq_index);
if (virt_msir < 0) {
dev_err(&pdev->dev, "Cannot translate IRQ index %d\n",
irq_index);
rc = -EINVAL;
goto error;
}
xgene_msi->msi_groups[irq_index].gic_irq = virt_msir;
xgene_msi->msi_groups[irq_index].msi_grp = irq_index;
xgene_msi->msi_groups[irq_index].msi = xgene_msi;
}
/*
* MSInIRx registers are read-to-clear; before registering
* interrupt handlers, read all of them to clear spurious
* interrupts that may occur before the driver is probed.
*/
for (irq_index = 0; irq_index < NR_HW_IRQS; irq_index++) {
for (msi_idx = 0; msi_idx < IDX_PER_GROUP; msi_idx++)
msi_val = xgene_msi_ir_read(xgene_msi, irq_index,
msi_idx);
/* Read MSIINTn to confirm */
msi_val = xgene_msi_int_read(xgene_msi, irq_index);
if (msi_val) {
dev_err(&pdev->dev, "Failed to clear spurious IRQ\n");
rc = -EINVAL;
goto error;
}
}
cpu_notifier_register_begin();
for_each_online_cpu(cpu)
if (xgene_msi_hwirq_alloc(cpu)) {
dev_err(&pdev->dev, "failed to register MSI handlers\n");
cpu_notifier_register_done();
goto error;
}
rc = __register_hotcpu_notifier(&xgene_msi_cpu_notifier);
if (rc) {
dev_err(&pdev->dev, "failed to add CPU MSI notifier\n");
cpu_notifier_register_done();
goto error;
}
cpu_notifier_register_done();
xgene_msi->mchip.of_node = pdev->dev.of_node;
rc = of_pci_msi_chip_add(&xgene_msi->mchip);
if (rc) {
dev_err(&pdev->dev, "failed to add MSI controller chip\n");
goto error_notifier;
}
dev_info(&pdev->dev, "APM X-Gene PCIe MSI driver loaded\n");
return 0;
error_notifier:
unregister_hotcpu_notifier(&xgene_msi_cpu_notifier);
error:
xgene_msi_remove(pdev);
return rc;
}
static struct platform_driver xgene_msi_driver = {
.driver = {
.name = "xgene-msi",
.owner = THIS_MODULE,
.of_match_table = xgene_msi_match_table,
},
.probe = xgene_msi_probe,
.remove = xgene_msi_remove,
};
static int __init xgene_pcie_msi_init(void)
{
return platform_driver_register(&xgene_msi_driver);
}
subsys_initcall(xgene_pcie_msi_init);

21
drivers/pci/host/pci-xgene.c
View File

@ -468,6 +468,23 @@ static int xgene_pcie_setup(struct xgene_pcie_port *port,
return 0;
}
static int xgene_pcie_msi_enable(struct pci_bus *bus)
{
struct device_node *msi_node;
msi_node = of_parse_phandle(bus->dev.of_node,
"msi-parent", 0);
if (!msi_node)
return -ENODEV;
bus->msi = of_pci_find_msi_chip_by_node(msi_node);
if (!bus->msi)
return -ENODEV;
bus->msi->dev = &bus->dev;
return 0;
}
static int xgene_pcie_probe_bridge(struct platform_device *pdev)
{
struct device_node *dn = pdev->dev.of_node;
@ -504,6 +521,10 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
if (!bus)
return -ENOMEM;
if (IS_ENABLED(CONFIG_PCI_MSI))
if (xgene_pcie_msi_enable(bus))
dev_info(port->dev, "failed to enable MSI\n");
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
pci_bus_add_devices(bus);

150
drivers/pci/host/pcie-designware.c
View File

@ -31,6 +31,7 @@
#define PORT_LINK_MODE_1_LANES (0x1 << 16)
#define PORT_LINK_MODE_2_LANES (0x3 << 16)
#define PORT_LINK_MODE_4_LANES (0x7 << 16)
#define PORT_LINK_MODE_8_LANES (0xf << 16)
#define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
#define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
@ -38,6 +39,7 @@
#define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
#define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
#define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
#define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8)
#define PCIE_MSI_ADDR_LO 0x820
#define PCIE_MSI_ADDR_HI 0x824
@ -150,6 +152,21 @@ static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
return ret;
}
static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
int type, u64 cpu_addr, u64 pci_addr, u32 size)
{
dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | index,
PCIE_ATU_VIEWPORT);
dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr), PCIE_ATU_LOWER_BASE);
dw_pcie_writel_rc(pp, upper_32_bits(cpu_addr), PCIE_ATU_UPPER_BASE);
dw_pcie_writel_rc(pp, lower_32_bits(cpu_addr + size - 1),
PCIE_ATU_LIMIT);
dw_pcie_writel_rc(pp, lower_32_bits(pci_addr), PCIE_ATU_LOWER_TARGET);
dw_pcie_writel_rc(pp, upper_32_bits(pci_addr), PCIE_ATU_UPPER_TARGET);
dw_pcie_writel_rc(pp, type, PCIE_ATU_CR1);
dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
}
static struct irq_chip dw_msi_irq_chip = {
.name = "PCI-MSI",
.irq_enable = pci_msi_unmask_irq,
@ -493,6 +510,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
if (pp->ops->host_init)
pp->ops->host_init(pp);
if (!pp->ops->rd_other_conf)
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
PCIE_ATU_TYPE_MEM, pp->mem_mod_base,
pp->mem_bus_addr, pp->mem_size);
dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
/* program correct class for RC */
@ -515,115 +537,73 @@ int dw_pcie_host_init(struct pcie_port *pp)
return 0;
}
static void dw_pcie_prog_viewport_cfg0(struct pcie_port *pp, u32 busdev)
{
/* Program viewport 0 : OUTBOUND : CFG0 */
dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
PCIE_ATU_VIEWPORT);
dw_pcie_writel_rc(pp, pp->cfg0_mod_base, PCIE_ATU_LOWER_BASE);
dw_pcie_writel_rc(pp, (pp->cfg0_mod_base >> 32), PCIE_ATU_UPPER_BASE);
dw_pcie_writel_rc(pp, pp->cfg0_mod_base + pp->cfg0_size - 1,
PCIE_ATU_LIMIT);
dw_pcie_writel_rc(pp, busdev, PCIE_ATU_LOWER_TARGET);
dw_pcie_writel_rc(pp, 0, PCIE_ATU_UPPER_TARGET);
dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG0, PCIE_ATU_CR1);
dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
}
static void dw_pcie_prog_viewport_cfg1(struct pcie_port *pp, u32 busdev)
{
/* Program viewport 1 : OUTBOUND : CFG1 */
dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
PCIE_ATU_VIEWPORT);
dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG1, PCIE_ATU_CR1);
dw_pcie_writel_rc(pp, pp->cfg1_mod_base, PCIE_ATU_LOWER_BASE);
dw_pcie_writel_rc(pp, (pp->cfg1_mod_base >> 32), PCIE_ATU_UPPER_BASE);
dw_pcie_writel_rc(pp, pp->cfg1_mod_base + pp->cfg1_size - 1,
PCIE_ATU_LIMIT);
dw_pcie_writel_rc(pp, busdev, PCIE_ATU_LOWER_TARGET);
dw_pcie_writel_rc(pp, 0, PCIE_ATU_UPPER_TARGET);
dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
}
static void dw_pcie_prog_viewport_mem_outbound(struct pcie_port *pp)
{
/* Program viewport 0 : OUTBOUND : MEM */
dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
PCIE_ATU_VIEWPORT);
dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1);
dw_pcie_writel_rc(pp, pp->mem_mod_base, PCIE_ATU_LOWER_BASE);
dw_pcie_writel_rc(pp, (pp->mem_mod_base >> 32), PCIE_ATU_UPPER_BASE);
dw_pcie_writel_rc(pp, pp->mem_mod_base + pp->mem_size - 1,
PCIE_ATU_LIMIT);
dw_pcie_writel_rc(pp, pp->mem_bus_addr, PCIE_ATU_LOWER_TARGET);
dw_pcie_writel_rc(pp, upper_32_bits(pp->mem_bus_addr),
PCIE_ATU_UPPER_TARGET);
dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
}
static void dw_pcie_prog_viewport_io_outbound(struct pcie_port *pp)
{
/* Program viewport 1 : OUTBOUND : IO */
dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
PCIE_ATU_VIEWPORT);
dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_IO, PCIE_ATU_CR1);
dw_pcie_writel_rc(pp, pp->io_mod_base, PCIE_ATU_LOWER_BASE);
dw_pcie_writel_rc(pp, (pp->io_mod_base >> 32), PCIE_ATU_UPPER_BASE);
dw_pcie_writel_rc(pp, pp->io_mod_base + pp->io_size - 1,
PCIE_ATU_LIMIT);
dw_pcie_writel_rc(pp, pp->io_bus_addr, PCIE_ATU_LOWER_TARGET);
dw_pcie_writel_rc(pp, upper_32_bits(pp->io_bus_addr),
PCIE_ATU_UPPER_TARGET);
dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
}
static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 devfn, int where, int size, u32 *val)
{
int ret = PCIBIOS_SUCCESSFUL;
u32 address, busdev;
int ret, type;
u32 address, busdev, cfg_size;
u64 cpu_addr;
void __iomem *va_cfg_base;
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
address = where & ~0x3;
if (bus->parent->number == pp->root_bus_nr) {
dw_pcie_prog_viewport_cfg0(pp, busdev);
ret = dw_pcie_cfg_read(pp->va_cfg0_base + address, where, size,
val);
dw_pcie_prog_viewport_mem_outbound(pp);
type = PCIE_ATU_TYPE_CFG0;
cpu_addr = pp->cfg0_mod_base;
cfg_size = pp->cfg0_size;
va_cfg_base = pp->va_cfg0_base;
} else {
dw_pcie_prog_viewport_cfg1(pp, busdev);
ret = dw_pcie_cfg_read(pp->va_cfg1_base + address, where, size,
val);
dw_pcie_prog_viewport_io_outbound(pp);
type = PCIE_ATU_TYPE_CFG1;
cpu_addr = pp->cfg1_mod_base;
cfg_size = pp->cfg1_size;
va_cfg_base = pp->va_cfg1_base;
}
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
type, cpu_addr,
busdev, cfg_size);
ret = dw_pcie_cfg_read(va_cfg_base + address, where, size, val);
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
PCIE_ATU_TYPE_IO, pp->io_mod_base,
pp->io_bus_addr, pp->io_size);
return ret;
}
static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 devfn, int where, int size, u32 val)
{
int ret = PCIBIOS_SUCCESSFUL;
u32 address, busdev;
int ret, type;
u32 address, busdev, cfg_size;
u64 cpu_addr;
void __iomem *va_cfg_base;
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
address = where & ~0x3;
if (bus->parent->number == pp->root_bus_nr) {
dw_pcie_prog_viewport_cfg0(pp, busdev);
ret = dw_pcie_cfg_write(pp->va_cfg0_base + address, where, size,
val);
dw_pcie_prog_viewport_mem_outbound(pp);
type = PCIE_ATU_TYPE_CFG0;
cpu_addr = pp->cfg0_mod_base;
cfg_size = pp->cfg0_size;
va_cfg_base = pp->va_cfg0_base;
} else {
dw_pcie_prog_viewport_cfg1(pp, busdev);
ret = dw_pcie_cfg_write(pp->va_cfg1_base + address, where, size,
val);
dw_pcie_prog_viewport_io_outbound(pp);
type = PCIE_ATU_TYPE_CFG1;
cpu_addr = pp->cfg1_mod_base;
cfg_size = pp->cfg1_size;
va_cfg_base = pp->va_cfg1_base;
}
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
type, cpu_addr,
busdev, cfg_size);
ret = dw_pcie_cfg_write(va_cfg_base + address, where, size, val);
dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
PCIE_ATU_TYPE_IO, pp->io_mod_base,
pp->io_bus_addr, pp->io_size);
return ret;
}
@ -776,6 +756,9 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
case 4:
val |= PORT_LINK_MODE_4_LANES;
break;
case 8:
val |= PORT_LINK_MODE_8_LANES;
break;
}
dw_pcie_writel_rc(pp, val, PCIE_PORT_LINK_CONTROL);
@ -792,6 +775,9 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
case 4:
val |= PORT_LOGIC_LINK_WIDTH_4_LANES;
break;
case 8:
val |= PORT_LOGIC_LINK_WIDTH_8_LANES;
break;
}
dw_pcie_writel_rc(pp, val, PCIE_LINK_WIDTH_SPEED_CONTROL);

110
drivers/pci/host/pcie-iproc-bcma.c Normal file
View File

@ -0,0 +1,110 @@
/*
* Copyright (C) 2015 Broadcom Corporation
* Copyright (C) 2015 Hauke Mehrtens <hauke@hauke-m.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/phy/phy.h>
#include <linux/bcma/bcma.h>
#include <linux/ioport.h>
#include "pcie-iproc.h"
/* NS: CLASS field is R/O, and set to wrong 0x200 value */
static void bcma_pcie2_fixup_class(struct pci_dev *dev)
{
dev->class = PCI_CLASS_BRIDGE_PCI << 8;
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8011, bcma_pcie2_fixup_class);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8012, bcma_pcie2_fixup_class);
static int iproc_pcie_bcma_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
struct pci_sys_data *sys = dev->sysdata;
struct iproc_pcie *pcie = sys->private_data;
struct bcma_device *bdev = container_of(pcie->dev, struct bcma_device, dev);
return bcma_core_irq(bdev, 5);
}
static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
{
struct iproc_pcie *pcie;
LIST_HEAD(res);
struct resource res_mem;
int ret;
pcie = devm_kzalloc(&bdev->dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
return -ENOMEM;
pcie->dev = &bdev->dev;
bcma_set_drvdata(bdev, pcie);
pcie->base = bdev->io_addr;
res_mem.start = bdev->addr_s[0];
res_mem.end = bdev->addr_s[0] + SZ_128M - 1;
res_mem.name = "PCIe MEM space";
res_mem.flags = IORESOURCE_MEM;
pci_add_resource(&res, &res_mem);
pcie->map_irq = iproc_pcie_bcma_map_irq;
ret = iproc_pcie_setup(pcie, &res);
if (ret)
dev_err(pcie->dev, "PCIe controller setup failed\n");
pci_free_resource_list(&res);
return ret;
}
static void iproc_pcie_bcma_remove(struct bcma_device *bdev)
{
struct iproc_pcie *pcie = bcma_get_drvdata(bdev);
iproc_pcie_remove(pcie);
}
static const struct bcma_device_id iproc_pcie_bcma_table[] = {
BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_PCIEG2, BCMA_ANY_REV, BCMA_ANY_CLASS),
{},
};
MODULE_DEVICE_TABLE(bcma, iproc_pcie_bcma_table);
static struct bcma_driver iproc_pcie_bcma_driver = {
.name = KBUILD_MODNAME,
.id_table = iproc_pcie_bcma_table,
.probe = iproc_pcie_bcma_probe,
.remove = iproc_pcie_bcma_remove,
};
static int __init iproc_pcie_bcma_init(void)
{
return bcma_driver_register(&iproc_pcie_bcma_driver);
}
module_init(iproc_pcie_bcma_init);
static void __exit iproc_pcie_bcma_exit(void)
{
bcma_driver_unregister(&iproc_pcie_bcma_driver);
}
module_exit(iproc_pcie_bcma_exit);
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_DESCRIPTION("Broadcom iProc PCIe BCMA driver");
MODULE_LICENSE("GPL v2");

12
drivers/pci/host/pcie-iproc-platform.c
View File

@ -69,15 +69,15 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
return ret;
}
pcie->resources = &res;
pcie->map_irq = of_irq_parse_and_map_pci;
ret = iproc_pcie_setup(pcie);
if (ret) {
ret = iproc_pcie_setup(pcie, &res);
if (ret)
dev_err(pcie->dev, "PCIe controller setup failed\n");
return ret;
}
return 0;
pci_free_resource_list(&res);
return ret;
}
static int iproc_pcie_pltfm_remove(struct platform_device *pdev)

6
drivers/pci/host/pcie-iproc.c
View File

@ -183,7 +183,7 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie)
writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN);
}
int iproc_pcie_setup(struct iproc_pcie *pcie)
int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
{
int ret;
struct pci_bus *bus;
@ -211,7 +211,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie)
pcie->sysdata.private_data = pcie;
bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops,
&pcie->sysdata, pcie->resources);
&pcie->sysdata, res);
if (!bus) {
dev_err(pcie->dev, "unable to create PCI root bus\n");
ret = -ENOMEM;
@ -229,7 +229,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie)
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
pci_bus_add_devices(bus);
return 0;

4
drivers/pci/host/pcie-iproc.h
View File

@ -29,14 +29,14 @@
struct iproc_pcie {
struct device *dev;
void __iomem *base;
struct list_head *resources;
struct pci_sys_data sysdata;
struct pci_bus *root_bus;
struct phy *phy;
int irqs[IPROC_PCIE_MAX_NUM_IRQS];
int (*map_irq)(const struct pci_dev *, u8, u8);
};
int iproc_pcie_setup(struct iproc_pcie *pcie);
int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
int iproc_pcie_remove(struct iproc_pcie *pcie);
#endif /* _PCIE_IPROC_H */

17
drivers/pci/host/pcie-spear13xx.c
View File

@ -146,10 +146,10 @@ struct pcie_app_reg {
static int spear13xx_pcie_establish_link(struct pcie_port *pp)
{
u32 val;
int count = 0;
struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pp);
struct pcie_app_reg *app_reg = spear13xx_pcie->app_base;
u32 exp_cap_off = EXP_CAP_ID_OFFSET;
unsigned int retries;
if (dw_pcie_link_up(pp)) {
dev_err(pp->dev, "link already up\n");
@ -201,17 +201,16 @@ static int spear13xx_pcie_establish_link(struct pcie_port *pp)
&app_reg->app_ctrl_0);
/* check if the link is up or not */
while (!dw_pcie_link_up(pp)) {
mdelay(100);
count++;
if (count == 10) {
dev_err(pp->dev, "link Fail\n");
return -EINVAL;
for (retries = 0; retries < 10; retries++) {
if (dw_pcie_link_up(pp)) {
dev_info(pp->dev, "link up\n");
return 0;
}
mdelay(100);
}
dev_info(pp->dev, "link up\n");
return 0;
dev_err(pp->dev, "link Fail\n");
return -EINVAL;
}
static irqreturn_t spear13xx_pcie_irq_handler(int irq, void *arg)