--- /dev/null
+From 93972d18bbaba6f34e21742400b6e7461edc4837 Mon Sep 17 00:00:00 2001
+From: Markus Elfring <elfring@users.sourceforge.net>
+Date: Sun, 28 Jun 2015 16:42:04 +0200
+Subject: [PATCH] PCI: iproc: Delete unnecessary checks before phy calls
+
+The functions phy_exit() and phy_power_off() test whether their argument is
+NULL and then return immediately. Thus the test around the calls is not
+needed.
+
+This issue was detected by using the Coccinelle software.
+
+[bhelgaas: also phy_init() and phy_power_on(), as Ray Jui suggested]
+[bhelgaas: also remove tests in iproc_pcie_remove()]
+Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+Reviewed-by: Ray Jui <rjui@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc.c | 34 +++++++++++++---------------------
+ 1 file changed, 13 insertions(+), 21 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -191,19 +191,16 @@ int iproc_pcie_setup(struct iproc_pcie *
+ if (!pcie || !pcie->dev || !pcie->base)
+ return -EINVAL;
+
+- if (pcie->phy) {
+- ret = phy_init(pcie->phy);
+- if (ret) {
+- dev_err(pcie->dev, "unable to initialize PCIe PHY\n");
+- return ret;
+- }
+-
+- ret = phy_power_on(pcie->phy);
+- if (ret) {
+- dev_err(pcie->dev, "unable to power on PCIe PHY\n");
+- goto err_exit_phy;
+- }
++ ret = phy_init(pcie->phy);
++ if (ret) {
++ dev_err(pcie->dev, "unable to initialize PCIe PHY\n");
++ return ret;
++ }
+
++ ret = phy_power_on(pcie->phy);
++ if (ret) {
++ dev_err(pcie->dev, "unable to power on PCIe PHY\n");
++ goto err_exit_phy;
+ }
+
+ iproc_pcie_reset(pcie);
+@@ -239,12 +236,9 @@ err_rm_root_bus:
+ pci_remove_root_bus(bus);
+
+ err_power_off_phy:
+- if (pcie->phy)
+- phy_power_off(pcie->phy);
++ phy_power_off(pcie->phy);
+ err_exit_phy:
+- if (pcie->phy)
+- phy_exit(pcie->phy);
+-
++ phy_exit(pcie->phy);
+ return ret;
+ }
+ EXPORT_SYMBOL(iproc_pcie_setup);
+@@ -254,10 +248,8 @@ int iproc_pcie_remove(struct iproc_pcie
+ pci_stop_root_bus(pcie->root_bus);
+ pci_remove_root_bus(pcie->root_bus);
+
+- if (pcie->phy) {
+- phy_power_off(pcie->phy);
+- phy_exit(pcie->phy);
+- }
++ phy_power_off(pcie->phy);
++ phy_exit(pcie->phy);
+
+ return 0;
+ }
--- /dev/null
+From db9d6d790968fd6df9faa7fa1f51967e05afd492 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Mon, 27 Jul 2015 15:42:18 -0700
+Subject: [PATCH 37/40] PCI: iproc: enable arm64 support for iProc PCIe
+
+PCI: iproc: Add arm64 support
+
+Add arm64 support to the iProc PCIe driver.
+
+Note that on arm32, bus->sysdata points to the arm32-specific
+pci_sys_data struct, and pci_sys_data.private_data contains the
+iproc_pcie pointer. For arm64, there's nothing corresponding to
+pci_sys_data, so we keep the iproc_pcie pointer directly in
+bus->sysdata.
+
+In addition, arm64 does IRQ mapping in pcibios_add_device(), so it
+doesn't need pci_fixup_irqs() as arm32 does.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+Acked-by: Bjorn Helgaas <bhelgaas@google.com>
+Signed-off-by: Olof Johansson <olof@lixom.net>
+---
+ drivers/pci/host/pcie-iproc.c | 27 ++++++++++++++++++++-------
+ drivers/pci/host/pcie-iproc.h | 4 +++-
+ 2 files changed, 23 insertions(+), 8 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -58,9 +58,17 @@
+ #define SYS_RC_INTX_EN 0x330
+ #define SYS_RC_INTX_MASK 0xf
+
+-static inline struct iproc_pcie *sys_to_pcie(struct pci_sys_data *sys)
++static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
+ {
+- return sys->private_data;
++ struct iproc_pcie *pcie;
++#ifdef CONFIG_ARM
++ struct pci_sys_data *sys = bus->sysdata;
++
++ pcie = sys->private_data;
++#else
++ pcie = bus->sysdata;
++#endif
++ return pcie;
+ }
+
+ /**
+@@ -71,8 +79,7 @@ static void __iomem *iproc_pcie_map_cfg_
+ unsigned int devfn,
+ int where)
+ {
+- struct pci_sys_data *sys = bus->sysdata;
+- struct iproc_pcie *pcie = sys_to_pcie(sys);
++ struct iproc_pcie *pcie = iproc_data(bus);
+ unsigned slot = PCI_SLOT(devfn);
+ unsigned fn = PCI_FUNC(devfn);
+ unsigned busno = bus->number;
+@@ -186,6 +193,7 @@ static void iproc_pcie_enable(struct ipr
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
+ {
+ int ret;
++ void *sysdata;
+ struct pci_bus *bus;
+
+ if (!pcie || !pcie->dev || !pcie->base)
+@@ -205,10 +213,13 @@ int iproc_pcie_setup(struct iproc_pcie *
+
+ iproc_pcie_reset(pcie);
+
++#ifdef CONFIG_ARM
+ pcie->sysdata.private_data = pcie;
+-
+- bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops,
+- &pcie->sysdata, res);
++ sysdata = &pcie->sysdata;
++#else
++ sysdata = pcie;
++#endif
++ bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, sysdata, res);
+ if (!bus) {
+ dev_err(pcie->dev, "unable to create PCI root bus\n");
+ ret = -ENOMEM;
+@@ -226,7 +237,9 @@ int iproc_pcie_setup(struct iproc_pcie *
+
+ pci_scan_child_bus(bus);
+ pci_assign_unassigned_bus_resources(bus);
++#ifdef CONFIG_ARM
+ pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
++#endif
+ pci_bus_add_devices(bus);
+
+ return 0;
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -21,7 +21,7 @@
+ * @dev: pointer to device data structure
+ * @base: PCIe host controller I/O register base
+ * @resources: linked list of all PCI resources
+- * @sysdata: Per PCI controller data
++ * @sysdata: Per PCI controller data (ARM-specific)
+ * @root_bus: pointer to root bus
+ * @phy: optional PHY device that controls the Serdes
+ * @irqs: interrupt IDs
+@@ -29,7 +29,9 @@
+ struct iproc_pcie {
+ struct device *dev;
+ void __iomem *base;
++#ifdef CONFIG_ARM
+ struct pci_sys_data sysdata;
++#endif
+ struct pci_bus *root_bus;
+ struct phy *phy;
+ int irqs[IPROC_PCIE_MAX_NUM_IRQS];
--- /dev/null
+From b00c4415fb231f276221c634a47ce7328df9aae5 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Mon, 27 Jul 2015 15:42:19 -0700
+Subject: [PATCH 38/40] PCI: iproc: Fix ARM64 dependency in Kconfig
+
+Allow Broadcom iProc PCIe core driver to be compiled for ARM64
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Vikram Prakash <vikramp@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+Acked-by: Bjorn Helgaas <bhelgaas@google.com>
+Signed-off-by: Olof Johansson <olof@lixom.net>
+---
+ drivers/pci/host/Kconfig | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/pci/host/Kconfig
++++ b/drivers/pci/host/Kconfig
+@@ -108,7 +108,7 @@ config PCI_VERSATILE
+
+ config PCIE_IPROC
+ tristate "Broadcom iProc PCIe controller"
+- depends on OF && ARM
++ depends on OF && (ARM || ARM64)
+ default n
+ help
+ This enables the iProc PCIe core controller support for Broadcom's
--- /dev/null
+From 5d92f41c48c5e3c6fa5be87e3d6fca57e2fbb127 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:15 -0700
+Subject: [PATCH 140/147] PCI: iproc: Fix code comment to match code
+
+Fix code comment in pcie-iproc.h so it matches the code.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -20,11 +20,11 @@
+ * iProc PCIe device
+ * @dev: pointer to device data structure
+ * @base: PCIe host controller I/O register base
+- * @resources: linked list of all PCI resources
+ * @sysdata: Per PCI controller data (ARM-specific)
+ * @root_bus: pointer to root bus
+ * @phy: optional PHY device that controls the Serdes
+ * @irqs: interrupt IDs
++ * @map_irq: function callback to map interrupts
+ */
+ struct iproc_pcie {
+ struct device *dev;
--- /dev/null
+From 98aac697a83db6e1d004e5d61cf6c976a0b1c35a Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:16 -0700
+Subject: [PATCH 141/147] PCI: iproc: Remove unused struct iproc_pcie.irqs[]
+
+Remove unused struct iproc_pcie member irqs[] and unused #define
+IPROC_PCIE_MAX_NUM_IRQS.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.h | 3 ---
+ 1 file changed, 3 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -14,8 +14,6 @@
+ #ifndef _PCIE_IPROC_H
+ #define _PCIE_IPROC_H
+
+-#define IPROC_PCIE_MAX_NUM_IRQS 6
+-
+ /**
+ * iProc PCIe device
+ * @dev: pointer to device data structure
+@@ -34,7 +32,6 @@ struct iproc_pcie {
+ #endif
+ struct pci_bus *root_bus;
+ struct phy *phy;
+- int irqs[IPROC_PCIE_MAX_NUM_IRQS];
+ int (*map_irq)(const struct pci_dev *, u8, u8);
+ };
+
--- /dev/null
+From bdb8a1844f3113ec08915d1e8e3fd5686fb2fb78 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:17 -0700
+Subject: [PATCH 142/147] PCI: iproc: Call pci_fixup_irqs() for ARM64 as well
+ as ARM
+
+After 459a07721c11 ("PCI: Build setup-irq.o for arm64"), we build
+setup-irq.o for arm64, so we can use pci_fixup_irqs() on both arm and
+arm64.
+
+Remove the "#ifdef CONFIG_ARM" around the call to pci_fixup_irqs().
+
+[bhelgaas: changelog]
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.c | 2 --
+ 1 file changed, 2 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -237,9 +237,7 @@ int iproc_pcie_setup(struct iproc_pcie *
+
+ pci_scan_child_bus(bus);
+ pci_assign_unassigned_bus_resources(bus);
+-#ifdef CONFIG_ARM
+ pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
+-#endif
+ pci_bus_add_devices(bus);
+
+ return 0;
--- /dev/null
+From 199ff14100095d52cd1b232cc0f3b12f348b5b07 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:18 -0700
+Subject: [PATCH 143/147] PCI: iproc: Fix PCIe reset logic
+
+The current reset logic does not always properly reset the device. For
+example, in the case when the perst_b signal is already de-asserted in the
+bootloader, the current reset logic fails to trigger a proper assert ->
+de-assert reset sequence.
+
+Fix the issue by always triggering the proper reset sequence.
+
+Also explicitly select the desired reset source, i.e., perst_b, and reduce
+the wait time after the device comes out of reset from 250 ms to 100 ms,
+based on recommendation from the ASIC team.
+
+Tested-by: Vladimir Dreizin <vdreizin@broadcom.com>
+Tested-by: Darren Edamura <dedamura@broadcom.com>
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+Reviewed-by: Vladimir Dreizin <vdreizin@broadcom.com>
+Reviewed-by: Trac Hoang <trhoang@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc.c | 15 ++++++++++-----
+ 1 file changed, 10 insertions(+), 5 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -31,6 +31,8 @@
+ #include "pcie-iproc.h"
+
+ #define CLK_CONTROL_OFFSET 0x000
++#define EP_PERST_SOURCE_SELECT_SHIFT 2
++#define EP_PERST_SOURCE_SELECT BIT(EP_PERST_SOURCE_SELECT_SHIFT)
+ #define EP_MODE_SURVIVE_PERST_SHIFT 1
+ #define EP_MODE_SURVIVE_PERST BIT(EP_MODE_SURVIVE_PERST_SHIFT)
+ #define RC_PCIE_RST_OUTPUT_SHIFT 0
+@@ -119,15 +121,18 @@ static void iproc_pcie_reset(struct ipro
+ u32 val;
+
+ /*
+- * Configure the PCIe controller as root complex and send a downstream
+- * reset
++ * Select perst_b signal as reset source. Put the device into reset,
++ * and then bring it out of reset
+ */
+- val = EP_MODE_SURVIVE_PERST | RC_PCIE_RST_OUTPUT;
++ val = readl(pcie->base + CLK_CONTROL_OFFSET);
++ val &= ~EP_PERST_SOURCE_SELECT & ~EP_MODE_SURVIVE_PERST &
++ ~RC_PCIE_RST_OUTPUT;
+ writel(val, pcie->base + CLK_CONTROL_OFFSET);
+ udelay(250);
+- val &= ~EP_MODE_SURVIVE_PERST;
++
++ val |= RC_PCIE_RST_OUTPUT;
+ writel(val, pcie->base + CLK_CONTROL_OFFSET);
+- msleep(250);
++ msleep(100);
+ }
+
+ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
--- /dev/null
+From aaf22ab4e916afa68a2e1aed4e913b76cbd58276 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:19 -0700
+Subject: [PATCH 144/147] PCI: iproc: Improve link detection logic
+
+Improve the link detection logic by explicitly querying the link status
+register to ensure link is active.
+
+Also force class to PCI_CLASS_BRIDGE_PCI (0x0604) through the host
+configuration space register.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+Reviewed-by: Anup Patel <anup.patel@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc.c | 29 +++++++++++++++++++++++------
+ 1 file changed, 23 insertions(+), 6 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -60,6 +60,12 @@
+ #define SYS_RC_INTX_EN 0x330
+ #define SYS_RC_INTX_MASK 0xf
+
++#define PCIE_LINK_STATUS_OFFSET 0xf0c
++#define PCIE_PHYLINKUP_SHIFT 3
++#define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT)
++#define PCIE_DL_ACTIVE_SHIFT 2
++#define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT)
++
+ static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
+ {
+ struct iproc_pcie *pcie;
+@@ -138,9 +144,15 @@ static void iproc_pcie_reset(struct ipro
+ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
+ {
+ u8 hdr_type;
+- u32 link_ctrl;
++ u32 link_ctrl, class, val;
+ u16 pos, link_status;
+- int link_is_active = 0;
++ bool link_is_active = false;
++
++ val = readl(pcie->base + PCIE_LINK_STATUS_OFFSET);
++ if (!(val & PCIE_PHYLINKUP) || !(val & PCIE_DL_ACTIVE)) {
++ dev_err(pcie->dev, "PHY or data link is INACTIVE!\n");
++ return -ENODEV;
++ }
+
+ /* make sure we are not in EP mode */
+ pci_bus_read_config_byte(bus, 0, PCI_HEADER_TYPE, &hdr_type);
+@@ -150,14 +162,19 @@ static int iproc_pcie_check_link(struct
+ }
+
+ /* force class to PCI_CLASS_BRIDGE_PCI (0x0604) */
+- pci_bus_write_config_word(bus, 0, PCI_CLASS_DEVICE,
+- PCI_CLASS_BRIDGE_PCI);
++#define PCI_BRIDGE_CTRL_REG_OFFSET 0x43c
++#define PCI_CLASS_BRIDGE_MASK 0xffff00
++#define PCI_CLASS_BRIDGE_SHIFT 8
++ pci_bus_read_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, &class);
++ class &= ~PCI_CLASS_BRIDGE_MASK;
++ class |= (PCI_CLASS_BRIDGE_PCI << PCI_CLASS_BRIDGE_SHIFT);
++ pci_bus_write_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, class);
+
+ /* check link status to see if link is active */
+ pos = pci_bus_find_capability(bus, 0, PCI_CAP_ID_EXP);
+ pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA, &link_status);
+ if (link_status & PCI_EXP_LNKSTA_NLW)
+- link_is_active = 1;
++ link_is_active = true;
+
+ if (!link_is_active) {
+ /* try GEN 1 link speed */
+@@ -181,7 +198,7 @@ static int iproc_pcie_check_link(struct
+ pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA,
+ &link_status);
+ if (link_status & PCI_EXP_LNKSTA_NLW)
+- link_is_active = 1;
++ link_is_active = true;
+ }
+ }
+
--- /dev/null
+From 8d0afa1a93be2da954c85392bbc7b2264c9d241c Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:20 -0700
+Subject: [PATCH 145/147] PCI: iproc: Update PCIe device tree bindings
+
+Update the device tree bindings with added support for outbound mapping
+configurations.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ .../devicetree/bindings/pci/brcm,iproc-pcie.txt | 20 ++++++++++++++++++++
+ 1 file changed, 20 insertions(+)
+
+--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
++++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
+@@ -17,6 +17,21 @@ Optional properties:
+ - phys: phandle of the PCIe PHY device
+ - phy-names: must be "pcie-phy"
+
++- brcm,pcie-ob: Some iProc SoCs do not have the outbound address mapping done
++by the ASIC after power on reset. In this case, SW needs to configure it
++
++If the brcm,pcie-ob property is present, the following properties become
++effective:
++
++Required:
++- brcm,pcie-ob-axi-offset: The offset from the AXI address to the internal
++address used by the iProc PCIe core (not the PCIe address)
++- brcm,pcie-ob-window-size: The outbound address mapping window size (in MB)
++
++Optional:
++- brcm,pcie-ob-oarr-size: Some iProc SoCs need the OARR size bit to be set to
++increase the outbound window size
++
+ Example:
+ pcie0: pcie@18012000 {
+ compatible = "brcm,iproc-pcie";
+@@ -38,6 +53,11 @@ Example:
+
+ phys = <&phy 0 5>;
+ phy-names = "pcie-phy";
++
++ brcm,pcie-ob;
++ brcm,pcie-ob-oarr-size;
++ brcm,pcie-ob-axi-offset = <0x00000000>;
++ brcm,pcie-ob-window-size = <256>;
+ };
+
+ pcie1: pcie@18013000 {
--- /dev/null
+From e99a187b5c5f60fe55ca586f82ac1a3557fb166a Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Fri, 16 Oct 2015 08:18:24 -0500
+Subject: [PATCH 146/147] PCI: iproc: Add outbound mapping support
+
+Certain SoCs require the PCIe outbound mapping to be configured in
+software. Add support for those chips.
+
+[jonmason: Use %pap format when printing size_t to avoid warnings in 32-bit
+build.]
+[arnd: Use div64_u64() instead of "%" to avoid __aeabi_uldivmod link error
+in 32-bit build.]
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Jon Mason <jonmason@broadcom.com>
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc-platform.c | 27 ++++++++
+ drivers/pci/host/pcie-iproc.c | 115 +++++++++++++++++++++++++++++++++
+ drivers/pci/host/pcie-iproc.h | 17 +++++
+ 3 files changed, 159 insertions(+)
+
+--- a/drivers/pci/host/pcie-iproc-platform.c
++++ b/drivers/pci/host/pcie-iproc-platform.c
+@@ -54,6 +54,33 @@ static int iproc_pcie_pltfm_probe(struct
+ return -ENOMEM;
+ }
+
++ if (of_property_read_bool(np, "brcm,pcie-ob")) {
++ u32 val;
++
++ ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
++ &val);
++ if (ret) {
++ dev_err(pcie->dev,
++ "missing brcm,pcie-ob-axi-offset property\n");
++ return ret;
++ }
++ pcie->ob.axi_offset = val;
++
++ ret = of_property_read_u32(np, "brcm,pcie-ob-window-size",
++ &val);
++ if (ret) {
++ dev_err(pcie->dev,
++ "missing brcm,pcie-ob-window-size property\n");
++ return ret;
++ }
++ pcie->ob.window_size = (resource_size_t)val * SZ_1M;
++
++ if (of_property_read_bool(np, "brcm,pcie-ob-oarr-size"))
++ pcie->ob.set_oarr_size = true;
++
++ pcie->need_ob_cfg = true;
++ }
++
+ /* PHY use is optional */
+ pcie->phy = devm_phy_get(&pdev->dev, "pcie-phy");
+ if (IS_ERR(pcie->phy)) {
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -66,6 +66,18 @@
+ #define PCIE_DL_ACTIVE_SHIFT 2
+ #define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT)
+
++#define OARR_VALID_SHIFT 0
++#define OARR_VALID BIT(OARR_VALID_SHIFT)
++#define OARR_SIZE_CFG_SHIFT 1
++#define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
++
++#define OARR_LO(window) (0xd20 + (window) * 8)
++#define OARR_HI(window) (0xd24 + (window) * 8)
++#define OMAP_LO(window) (0xd40 + (window) * 8)
++#define OMAP_HI(window) (0xd44 + (window) * 8)
++
++#define MAX_NUM_OB_WINDOWS 2
++
+ static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
+ {
+ struct iproc_pcie *pcie;
+@@ -212,6 +224,101 @@ static void iproc_pcie_enable(struct ipr
+ writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN);
+ }
+
++/**
++ * Some iProc SoCs require the SW to configure the outbound address mapping
++ *
++ * Outbound address translation:
++ *
++ * iproc_pcie_address = axi_address - axi_offset
++ * OARR = iproc_pcie_address
++ * OMAP = pci_addr
++ *
++ * axi_addr -> iproc_pcie_address -> OARR -> OMAP -> pci_address
++ */
++static int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
++ u64 pci_addr, resource_size_t size)
++{
++ struct iproc_pcie_ob *ob = &pcie->ob;
++ unsigned i;
++ u64 max_size = (u64)ob->window_size * MAX_NUM_OB_WINDOWS;
++ u64 remainder;
++
++ if (size > max_size) {
++ dev_err(pcie->dev,
++ "res size 0x%pap exceeds max supported size 0x%llx\n",
++ &size, max_size);
++ return -EINVAL;
++ }
++
++ div64_u64_rem(size, ob->window_size, &remainder);
++ if (remainder) {
++ dev_err(pcie->dev,
++ "res size %pap needs to be multiple of window size %pap\n",
++ &size, &ob->window_size);
++ return -EINVAL;
++ }
++
++ if (axi_addr < ob->axi_offset) {
++ dev_err(pcie->dev,
++ "axi address %pap less than offset %pap\n",
++ &axi_addr, &ob->axi_offset);
++ return -EINVAL;
++ }
++
++ /*
++ * Translate the AXI address to the internal address used by the iProc
++ * PCIe core before programming the OARR
++ */
++ axi_addr -= ob->axi_offset;
++
++ for (i = 0; i < MAX_NUM_OB_WINDOWS; i++) {
++ writel(lower_32_bits(axi_addr) | OARR_VALID |
++ (ob->set_oarr_size ? 1 : 0), pcie->base + OARR_LO(i));
++ writel(upper_32_bits(axi_addr), pcie->base + OARR_HI(i));
++ writel(lower_32_bits(pci_addr), pcie->base + OMAP_LO(i));
++ writel(upper_32_bits(pci_addr), pcie->base + OMAP_HI(i));
++
++ size -= ob->window_size;
++ if (size == 0)
++ break;
++
++ axi_addr += ob->window_size;
++ pci_addr += ob->window_size;
++ }
++
++ return 0;
++}
++
++static int iproc_pcie_map_ranges(struct iproc_pcie *pcie,
++ struct list_head *resources)
++{
++ struct resource_entry *window;
++ int ret;
++
++ resource_list_for_each_entry(window, resources) {
++ struct resource *res = window->res;
++ u64 res_type = resource_type(res);
++
++ switch (res_type) {
++ case IORESOURCE_IO:
++ case IORESOURCE_BUS:
++ break;
++ case IORESOURCE_MEM:
++ ret = iproc_pcie_setup_ob(pcie, res->start,
++ res->start - window->offset,
++ resource_size(res));
++ if (ret)
++ return ret;
++ break;
++ default:
++ dev_err(pcie->dev, "invalid resource %pR\n", res);
++ return -EINVAL;
++ }
++ }
++
++ return 0;
++}
++
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
+ {
+ int ret;
+@@ -235,6 +342,14 @@ int iproc_pcie_setup(struct iproc_pcie *
+
+ iproc_pcie_reset(pcie);
+
++ if (pcie->need_ob_cfg) {
++ ret = iproc_pcie_map_ranges(pcie, res);
++ if (ret) {
++ dev_err(pcie->dev, "map failed\n");
++ goto err_power_off_phy;
++ }
++ }
++
+ #ifdef CONFIG_ARM
+ pcie->sysdata.private_data = pcie;
+ sysdata = &pcie->sysdata;
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -15,6 +15,19 @@
+ #define _PCIE_IPROC_H
+
+ /**
++ * iProc PCIe outbound mapping
++ * @set_oarr_size: indicates the OARR size bit needs to be set
++ * @axi_offset: offset from the AXI address to the internal address used by
++ * the iProc PCIe core
++ * @window_size: outbound window size
++ */
++struct iproc_pcie_ob {
++ bool set_oarr_size;
++ resource_size_t axi_offset;
++ resource_size_t window_size;
++};
++
++/**
+ * iProc PCIe device
+ * @dev: pointer to device data structure
+ * @base: PCIe host controller I/O register base
+@@ -23,6 +36,8 @@
+ * @phy: optional PHY device that controls the Serdes
+ * @irqs: interrupt IDs
+ * @map_irq: function callback to map interrupts
++ * @need_ob_cfg: indidates SW needs to configure the outbound mapping window
++ * @ob: outbound mapping parameters
+ */
+ struct iproc_pcie {
+ struct device *dev;
+@@ -33,6 +48,8 @@ struct iproc_pcie {
+ struct pci_bus *root_bus;
+ struct phy *phy;
+ int (*map_irq)(const struct pci_dev *, u8, u8);
++ bool need_ob_cfg;
++ struct iproc_pcie_ob ob;
+ };
+
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
--- /dev/null
+From be908d21b2e9c2cab1ef568dfca4f9777611b3dd Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <f.fainelli@gmail.com>
+Date: Fri, 16 Oct 2015 12:04:04 -0700
+Subject: [PATCH 147/147] PCI: iproc: Fix header comment "Corporation"
+ misspelling
+
+Fix an obvious "Broadcom Corporation" typo in a header comment.
+
+Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+Acked-by: Ray Jui <rjui@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -1,6 +1,6 @@
+ /*
+ * Copyright (C) 2014 Hauke Mehrtens <hauke@hauke-m.de>
+- * Copyright (C) 2015 Broadcom Corporatcommon ion
++ * Copyright (C) 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
--- /dev/null
+From d85a955118c8d8679d4f746fe2189c172d7c365f Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Mon, 16 Nov 2015 17:18:05 -0800
+Subject: [PATCH 150/154] PCI: iproc: Update iProc PCIe device tree binding
+
+Add a new compatible string "brcm,iproc-pcie-paxc", for PAXC based iProc
+PCIe root complex. A PAXC based PCIe root complex is connected to
+emulated endpoint devices internal to the ASIC
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
++++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
+@@ -1,7 +1,10 @@
+ * Broadcom iProc PCIe controller with the platform bus interface
+
+ Required properties:
+-- compatible: Must be "brcm,iproc-pcie"
++- compatible: Must be "brcm,iproc-pcie" for PAXB, or "brcm,iproc-pcie-paxc"
++ for PAXC. PAXB based root complex is used for external endpoint devices.
++ PAXC based root complex is connected to emulated endpoint devices
++ internal to the ASIC
+ - reg: base address and length of the PCIe controller I/O register space
+ - #interrupt-cells: set to <1>
+ - interrupt-map-mask and interrupt-map, standard PCI properties to define the
--- /dev/null
+From a13fc4733b25d6dad6ec1826f09225c69ee21e3a Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Mon, 16 Nov 2015 17:41:43 -0800
+Subject: [PATCH 151/154] PCI: iproc: Add PAXC interface support
+
+Traditionally, all iProc PCIe root complexes use PAXB based wrapper,
+with an integrated on-chip Serdes to support external endpoint devices.
+On newer iProc platforms, a PAXC based wrapper is introduced, for
+connection with internally emulated PCIe endpoint devices in the ASIC
+
+This patch adds support for PAXC based iProc PCIe root complex in the
+iProc PCIe core driver. This change fators out common logic between
+PAXB and PAXC, and use tables to store register offsets that are
+different between PAXB and PAXC. This allows the driver to be scaled to
+support subsequent PAXC revisions in the future
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc-platform.c | 24 +++-
+ drivers/pci/host/pcie-iproc.c | 202 +++++++++++++++++++++++++++------
+ drivers/pci/host/pcie-iproc.h | 19 ++++
+ 3 files changed, 205 insertions(+), 40 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc-platform.c
++++ b/drivers/pci/host/pcie-iproc-platform.c
+@@ -26,8 +26,21 @@
+
+ #include "pcie-iproc.h"
+
++static const struct of_device_id iproc_pcie_of_match_table[] = {
++ {
++ .compatible = "brcm,iproc-pcie",
++ .data = (int *)IPROC_PCIE_PAXB,
++ }, {
++ .compatible = "brcm,iproc-pcie-paxc",
++ .data = (int *)IPROC_PCIE_PAXC,
++ },
++ { /* sentinel */ }
++};
++MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
++
+ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
+ {
++ const struct of_device_id *of_id;
+ struct iproc_pcie *pcie;
+ struct device_node *np = pdev->dev.of_node;
+ struct resource reg;
+@@ -35,11 +48,16 @@ static int iproc_pcie_pltfm_probe(struct
+ LIST_HEAD(res);
+ int ret;
+
++ of_id = of_match_device(iproc_pcie_of_match_table, &pdev->dev);
++ if (!of_id)
++ return -EINVAL;
++
+ pcie = devm_kzalloc(&pdev->dev, sizeof(struct iproc_pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+
+ pcie->dev = &pdev->dev;
++ pcie->type = (enum iproc_pcie_type)of_id->data;
+ platform_set_drvdata(pdev, pcie);
+
+ ret = of_address_to_resource(np, 0, ®);
+@@ -114,12 +132,6 @@ static int iproc_pcie_pltfm_remove(struc
+ return iproc_pcie_remove(pcie);
+ }
+
+-static const struct of_device_id iproc_pcie_of_match_table[] = {
+- { .compatible = "brcm,iproc-pcie", },
+- { /* sentinel */ }
+-};
+-MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
+-
+ static struct platform_driver iproc_pcie_pltfm_driver = {
+ .driver = {
+ .name = "iproc-pcie",
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -30,20 +30,16 @@
+
+ #include "pcie-iproc.h"
+
+-#define CLK_CONTROL_OFFSET 0x000
+ #define EP_PERST_SOURCE_SELECT_SHIFT 2
+ #define EP_PERST_SOURCE_SELECT BIT(EP_PERST_SOURCE_SELECT_SHIFT)
+ #define EP_MODE_SURVIVE_PERST_SHIFT 1
+ #define EP_MODE_SURVIVE_PERST BIT(EP_MODE_SURVIVE_PERST_SHIFT)
+ #define RC_PCIE_RST_OUTPUT_SHIFT 0
+ #define RC_PCIE_RST_OUTPUT BIT(RC_PCIE_RST_OUTPUT_SHIFT)
++#define PAXC_RESET_MASK 0x7f
+
+-#define CFG_IND_ADDR_OFFSET 0x120
+ #define CFG_IND_ADDR_MASK 0x00001ffc
+
+-#define CFG_IND_DATA_OFFSET 0x124
+-
+-#define CFG_ADDR_OFFSET 0x1f8
+ #define CFG_ADDR_BUS_NUM_SHIFT 20
+ #define CFG_ADDR_BUS_NUM_MASK 0x0ff00000
+ #define CFG_ADDR_DEV_NUM_SHIFT 15
+@@ -55,12 +51,8 @@
+ #define CFG_ADDR_CFG_TYPE_SHIFT 0
+ #define CFG_ADDR_CFG_TYPE_MASK 0x00000003
+
+-#define CFG_DATA_OFFSET 0x1fc
+-
+-#define SYS_RC_INTX_EN 0x330
+ #define SYS_RC_INTX_MASK 0xf
+
+-#define PCIE_LINK_STATUS_OFFSET 0xf0c
+ #define PCIE_PHYLINKUP_SHIFT 3
+ #define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT)
+ #define PCIE_DL_ACTIVE_SHIFT 2
+@@ -71,12 +63,54 @@
+ #define OARR_SIZE_CFG_SHIFT 1
+ #define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
+
+-#define OARR_LO(window) (0xd20 + (window) * 8)
+-#define OARR_HI(window) (0xd24 + (window) * 8)
+-#define OMAP_LO(window) (0xd40 + (window) * 8)
+-#define OMAP_HI(window) (0xd44 + (window) * 8)
+-
+ #define MAX_NUM_OB_WINDOWS 2
++#define MAX_NUM_PAXC_PF 4
++
++#define IPROC_PCIE_REG_INVALID 0xffff
++
++enum iproc_pcie_reg {
++ IPROC_PCIE_CLK_CTRL = 0,
++ IPROC_PCIE_CFG_IND_ADDR,
++ IPROC_PCIE_CFG_IND_DATA,
++ IPROC_PCIE_CFG_ADDR,
++ IPROC_PCIE_CFG_DATA,
++ IPROC_PCIE_INTX_EN,
++ IPROC_PCIE_OARR_LO,
++ IPROC_PCIE_OARR_HI,
++ IPROC_PCIE_OMAP_LO,
++ IPROC_PCIE_OMAP_HI,
++ IPROC_PCIE_LINK_STATUS,
++};
++
++/* iProc PCIe PAXB registers */
++static const u16 iproc_pcie_reg_paxb[] = {
++ [IPROC_PCIE_CLK_CTRL] = 0x000,
++ [IPROC_PCIE_CFG_IND_ADDR] = 0x120,
++ [IPROC_PCIE_CFG_IND_DATA] = 0x124,
++ [IPROC_PCIE_CFG_ADDR] = 0x1f8,
++ [IPROC_PCIE_CFG_DATA] = 0x1fc,
++ [IPROC_PCIE_INTX_EN] = 0x330,
++ [IPROC_PCIE_OARR_LO] = 0xd20,
++ [IPROC_PCIE_OARR_HI] = 0xd24,
++ [IPROC_PCIE_OMAP_LO] = 0xd40,
++ [IPROC_PCIE_OMAP_HI] = 0xd44,
++ [IPROC_PCIE_LINK_STATUS] = 0xf0c,
++};
++
++/* iProc PCIe PAXC v1 registers */
++static const u16 iproc_pcie_reg_paxc[] = {
++ [IPROC_PCIE_CLK_CTRL] = 0x000,
++ [IPROC_PCIE_CFG_IND_ADDR] = 0x1f0,
++ [IPROC_PCIE_CFG_IND_DATA] = 0x1f4,
++ [IPROC_PCIE_CFG_ADDR] = 0x1f8,
++ [IPROC_PCIE_CFG_DATA] = 0x1fc,
++ [IPROC_PCIE_INTX_EN] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_OARR_LO] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_OARR_HI] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_OMAP_LO] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_OMAP_HI] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_LINK_STATUS] = IPROC_PCIE_REG_INVALID,
++};
+
+ static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
+ {
+@@ -91,6 +125,65 @@ static inline struct iproc_pcie *iproc_d
+ return pcie;
+ }
+
++static inline bool iproc_pcie_reg_is_invalid(u16 reg_offset)
++{
++ return !!(reg_offset == IPROC_PCIE_REG_INVALID);
++}
++
++static inline u16 iproc_pcie_reg_offset(struct iproc_pcie *pcie,
++ enum iproc_pcie_reg reg)
++{
++ return pcie->reg_offsets[reg];
++}
++
++static inline u32 iproc_pcie_read_reg(struct iproc_pcie *pcie,
++ enum iproc_pcie_reg reg)
++{
++ u16 offset = iproc_pcie_reg_offset(pcie, reg);
++
++ if (iproc_pcie_reg_is_invalid(offset))
++ return 0;
++
++ return readl(pcie->base + offset);
++}
++
++static inline void iproc_pcie_write_reg(struct iproc_pcie *pcie,
++ enum iproc_pcie_reg reg, u32 val)
++{
++ u16 offset = iproc_pcie_reg_offset(pcie, reg);
++
++ if (iproc_pcie_reg_is_invalid(offset))
++ return;
++
++ writel(val, pcie->base + offset);
++}
++
++static inline void iproc_pcie_ob_write(struct iproc_pcie *pcie,
++ enum iproc_pcie_reg reg,
++ unsigned window, u32 val)
++{
++ u16 offset = iproc_pcie_reg_offset(pcie, reg);
++
++ if (iproc_pcie_reg_is_invalid(offset))
++ return;
++
++ writel(val, pcie->base + offset + (window * 8));
++}
++
++static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
++ unsigned int slot,
++ unsigned int fn)
++{
++ if (slot > 0)
++ return false;
++
++ /* PAXC can only support limited number of functions */
++ if (pcie->type == IPROC_PCIE_PAXC && fn >= MAX_NUM_PAXC_PF)
++ return false;
++
++ return true;
++}
++
+ /**
+ * Note access to the configuration registers are protected at the higher layer
+ * by 'pci_lock' in drivers/pci/access.c
+@@ -104,28 +197,34 @@ static void __iomem *iproc_pcie_map_cfg_
+ unsigned fn = PCI_FUNC(devfn);
+ unsigned busno = bus->number;
+ u32 val;
++ u16 offset;
++
++ if (!iproc_pcie_device_is_valid(pcie, slot, fn))
++ return NULL;
+
+ /* root complex access */
+ if (busno == 0) {
+- if (slot >= 1)
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
++ where & CFG_IND_ADDR_MASK);
++ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
++ if (iproc_pcie_reg_is_invalid(offset))
+ return NULL;
+- writel(where & CFG_IND_ADDR_MASK,
+- pcie->base + CFG_IND_ADDR_OFFSET);
+- return (pcie->base + CFG_IND_DATA_OFFSET);
++ else
++ return (pcie->base + offset);
+ }
+
+- if (fn > 1)
+- return NULL;
+-
+ /* EP device access */
+ val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
+ (slot << CFG_ADDR_DEV_NUM_SHIFT) |
+ (fn << CFG_ADDR_FUNC_NUM_SHIFT) |
+ (where & CFG_ADDR_REG_NUM_MASK) |
+ (1 & CFG_ADDR_CFG_TYPE_MASK);
+- writel(val, pcie->base + CFG_ADDR_OFFSET);
+-
+- return (pcie->base + CFG_DATA_OFFSET);
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val);
++ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA);
++ if (iproc_pcie_reg_is_invalid(offset))
++ return NULL;
++ else
++ return (pcie->base + offset);
+ }
+
+ static struct pci_ops iproc_pcie_ops = {
+@@ -138,18 +237,29 @@ static void iproc_pcie_reset(struct ipro
+ {
+ u32 val;
+
++ if (pcie->type == IPROC_PCIE_PAXC) {
++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL);
++ val &= ~PAXC_RESET_MASK;
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
++ udelay(100);
++ val |= PAXC_RESET_MASK;
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
++ udelay(100);
++ return;
++ }
++
+ /*
+ * Select perst_b signal as reset source. Put the device into reset,
+ * and then bring it out of reset
+ */
+- val = readl(pcie->base + CLK_CONTROL_OFFSET);
++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL);
+ val &= ~EP_PERST_SOURCE_SELECT & ~EP_MODE_SURVIVE_PERST &
+ ~RC_PCIE_RST_OUTPUT;
+- writel(val, pcie->base + CLK_CONTROL_OFFSET);
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
+ udelay(250);
+
+ val |= RC_PCIE_RST_OUTPUT;
+- writel(val, pcie->base + CLK_CONTROL_OFFSET);
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
+ msleep(100);
+ }
+
+@@ -160,7 +270,14 @@ static int iproc_pcie_check_link(struct
+ u16 pos, link_status;
+ bool link_is_active = false;
+
+- val = readl(pcie->base + PCIE_LINK_STATUS_OFFSET);
++ /*
++ * PAXC connects to emulated endpoint devices directly and does not
++ * have a Serdes. Therefore skip the link detection logic here
++ */
++ if (pcie->type == IPROC_PCIE_PAXC)
++ return 0;
++
++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_LINK_STATUS);
+ if (!(val & PCIE_PHYLINKUP) || !(val & PCIE_DL_ACTIVE)) {
+ dev_err(pcie->dev, "PHY or data link is INACTIVE!\n");
+ return -ENODEV;
+@@ -221,7 +338,7 @@ static int iproc_pcie_check_link(struct
+
+ static void iproc_pcie_enable(struct iproc_pcie *pcie)
+ {
+- writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN);
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_INTX_EN, SYS_RC_INTX_MASK);
+ }
+
+ /**
+@@ -272,11 +389,15 @@ static int iproc_pcie_setup_ob(struct ip
+ axi_addr -= ob->axi_offset;
+
+ for (i = 0; i < MAX_NUM_OB_WINDOWS; i++) {
+- writel(lower_32_bits(axi_addr) | OARR_VALID |
+- (ob->set_oarr_size ? 1 : 0), pcie->base + OARR_LO(i));
+- writel(upper_32_bits(axi_addr), pcie->base + OARR_HI(i));
+- writel(lower_32_bits(pci_addr), pcie->base + OMAP_LO(i));
+- writel(upper_32_bits(pci_addr), pcie->base + OMAP_HI(i));
++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OARR_LO, i,
++ lower_32_bits(axi_addr) | OARR_VALID |
++ (ob->set_oarr_size ? 1 : 0));
++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OARR_HI, i,
++ upper_32_bits(axi_addr));
++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OMAP_LO, i,
++ lower_32_bits(pci_addr));
++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OMAP_HI, i,
++ upper_32_bits(pci_addr));
+
+ size -= ob->window_size;
+ if (size == 0)
+@@ -340,6 +461,19 @@ int iproc_pcie_setup(struct iproc_pcie *
+ goto err_exit_phy;
+ }
+
++ switch (pcie->type) {
++ case IPROC_PCIE_PAXB:
++ pcie->reg_offsets = iproc_pcie_reg_paxb;
++ break;
++ case IPROC_PCIE_PAXC:
++ pcie->reg_offsets = iproc_pcie_reg_paxc;
++ break;
++ default:
++ dev_err(pcie->dev, "incompatible iProc PCIe interface\n");
++ ret = -EINVAL;
++ goto err_power_off_phy;
++ }
++
+ iproc_pcie_reset(pcie);
+
+ if (pcie->need_ob_cfg) {
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -15,6 +15,20 @@
+ #define _PCIE_IPROC_H
+
+ /**
++ * iProc PCIe interface type
++ *
++ * PAXB is the wrapper used in root complex that can be connected to an
++ * external endpoint device
++ *
++ * PAXC is the wrapper used in root complex dedicated for internal emulated
++ * endpoint devices
++ */
++enum iproc_pcie_type {
++ IPROC_PCIE_PAXB = 0,
++ IPROC_PCIE_PAXC,
++};
++
++/**
+ * iProc PCIe outbound mapping
+ * @set_oarr_size: indicates the OARR size bit needs to be set
+ * @axi_offset: offset from the AXI address to the internal address used by
+@@ -29,7 +43,10 @@ struct iproc_pcie_ob {
+
+ /**
+ * iProc PCIe device
++ *
+ * @dev: pointer to device data structure
++ * @type: iProc PCIe interface type
++ * @reg_offsets: register offsets
+ * @base: PCIe host controller I/O register base
+ * @sysdata: Per PCI controller data (ARM-specific)
+ * @root_bus: pointer to root bus
+@@ -41,6 +58,8 @@ struct iproc_pcie_ob {
+ */
+ struct iproc_pcie {
+ struct device *dev;
++ enum iproc_pcie_type type;
++ const u16 *reg_offsets;
+ void __iomem *base;
+ #ifdef CONFIG_ARM
+ struct pci_sys_data sysdata;
--- /dev/null
+From 96b40de5e36ec479dabb88500f1830a87818a809 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Mon, 16 Nov 2015 17:57:33 -0800
+Subject: [PATCH 152/154] PCI: iproc: Add iProc PCIe MSI device tree binding
+
+This patch updates the iProc PCIe device tree bindings with added
+binding information for MSI
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Anup Patel <anup.patel@broadcom.com>
+Reviewed-by: Vikram Prakash <vikramp@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ .../devicetree/bindings/pci/brcm,iproc-pcie.txt | 35 ++++++++++++++++++++++
+ 1 file changed, 35 insertions(+)
+
+--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
++++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
+@@ -35,6 +35,28 @@ Optional:
+ - brcm,pcie-ob-oarr-size: Some iProc SoCs need the OARR size bit to be set to
+ increase the outbound window size
+
++MSI support (optional):
++
++For older platforms without MSI integrated in the GIC, iProc PCIe core provides
++an event queue based MSI support. The iProc MSI uses host memories to store
++MSI posted writes in the event queues
++
++- msi-parent: Link to the device node of the MSI controller. On newer iProc
++platforms, the MSI controller may be gicv2m or gicv3-its. On older iProc
++platforms without MSI support in its interrupt controller, one may use the
++event queue based MSI support integrated within the iProc PCIe core
++
++When the iProc event queue based MSI is used, one needs to define the
++following properties in the MSI device node:
++- compatible: Must be "brcm,iproc-msi"
++- msi-controller: claims itself as an MSI controller
++- interrupt-parent: Link to its parent interrupt device
++- interrupts: List of interrupt IDs from its parent interrupt device
++
++Optional properties:
++- brcm,pcie-msi-inten: Needs to be present for some older iProc platforms that
++require the interrupt enable registers to be set explicitly to enable MSI
++
+ Example:
+ pcie0: pcie@18012000 {
+ compatible = "brcm,iproc-pcie";
+@@ -61,6 +83,19 @@ Example:
+ brcm,pcie-ob-oarr-size;
+ brcm,pcie-ob-axi-offset = <0x00000000>;
+ brcm,pcie-ob-window-size = <256>;
++
++ msi-parent = <&msi0>;
++
++ /* iProc event queue based MSI */
++ msi0: msi@18012000 {
++ compatible = "brcm,iproc-msi";
++ msi-controller;
++ interrupt-parent = <&gic>;
++ interrupts = <GIC_SPI 96 IRQ_TYPE_NONE>,
++ <GIC_SPI 97 IRQ_TYPE_NONE>,
++ <GIC_SPI 98 IRQ_TYPE_NONE>,
++ <GIC_SPI 99 IRQ_TYPE_NONE>,
++ };
+ };
+
+ pcie1: pcie@18013000 {
--- /dev/null
+From c81922174d61127ff5baad6059ae148794c72276 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 17 Nov 2015 13:14:37 -0800
+Subject: [PATCH 153/154] PCI: iproc: Add iProc PCIe MSI support
+
+This patch adds PCIe MSI support for both PAXB and PAXC interfaces on
+all iProc based platforms
+
+The iProc PCIe MSI support deploys an event queue based implementation.
+Each event queue is serviced by a GIC interrupt and can support up to 64
+MSI vectors. Host memory is allocated for the event queues, and each event
+queue consists of 64 word-sized entries. MSI data is written to the
+lower 16-bit of each entry, whereas the upper 16-bit of the entry is
+reserved for the controller for internal processing
+
+Each event queue is tracked by a head pointer and tail pointer. Head
+pointer indicates the next entry in the event queue to be processed by
+the driver and is updated by the driver after processing is done.
+The controller uses the tail pointer as the next MSI data insertion
+point. The controller ensures MSI data is flushed to host memory before
+updating the tail pointer and then triggering the interrupt
+
+MSI IRQ affinity is supported by evenly distributing the interrupts to
+each CPU core. MSI vector is moved from one GIC interrupt to another in
+order to steer to the target CPU
+
+Therefore, the actual number of supported MSI vectors is:
+
+M * 64 / N
+
+where M denotes the number of GIC interrupts (event queues), and N
+denotes the number of CPU cores
+
+This iProc event queue based MSI support should not be used with newer
+platforms with integrated MSI support in the GIC (e.g., giv2m or
+gicv3-its)
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Anup Patel <anup.patel@broadcom.com>
+Reviewed-by: Vikram Prakash <vikramp@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ drivers/pci/host/Kconfig | 9 +
+ drivers/pci/host/Makefile | 1 +
+ drivers/pci/host/pcie-iproc-bcma.c | 1 +
+ drivers/pci/host/pcie-iproc-msi.c | 675 +++++++++++++++++++++++++++++++++
+ drivers/pci/host/pcie-iproc-platform.c | 1 +
+ drivers/pci/host/pcie-iproc.c | 26 ++
+ drivers/pci/host/pcie-iproc.h | 23 +-
+ 7 files changed, 734 insertions(+), 2 deletions(-)
+ create mode 100644 drivers/pci/host/pcie-iproc-msi.c
+
+--- a/drivers/pci/host/Kconfig
++++ b/drivers/pci/host/Kconfig
+@@ -115,6 +115,15 @@ config PCIE_IPROC
+ iProc family of SoCs. An appropriate bus interface driver also needs
+ to be enabled
+
++config PCIE_IPROC_MSI
++ bool "Broadcom iProc PCIe MSI support"
++ depends on ARCH_BCM_IPROC && PCI_MSI
++ select PCI_MSI_IRQ_DOMAIN
++ default ARCH_BCM_IPROC
++ help
++ Say Y here if you want to enable MSI support for Broadcom's iProc
++ PCIe controller
++
+ config PCIE_IPROC_PLATFORM
+ tristate "Broadcom iProc PCIe platform bus driver"
+ depends on ARCH_BCM_IPROC || (ARM && COMPILE_TEST)
+--- a/drivers/pci/host/Makefile
++++ b/drivers/pci/host/Makefile
+@@ -14,5 +14,6 @@ obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
+ obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o
+ obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
+ obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
++obj-$(CONFIG_PCIE_IPROC_MSI) += pcie-iproc-msi.o
+ obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o
+ obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
+--- a/drivers/pci/host/pcie-iproc-bcma.c
++++ b/drivers/pci/host/pcie-iproc-bcma.c
+@@ -55,6 +55,7 @@ static int iproc_pcie_bcma_probe(struct
+ bcma_set_drvdata(bdev, pcie);
+
+ pcie->base = bdev->io_addr;
++ pcie->base_addr = bdev->addr;
+
+ res_mem.start = bdev->addr_s[0];
+ res_mem.end = bdev->addr_s[0] + SZ_128M - 1;
+--- /dev/null
++++ b/drivers/pci/host/pcie-iproc-msi.c
+@@ -0,0 +1,675 @@
++/*
++ * Copyright (C) 2015 Broadcom Corporation
++ *
++ * 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/interrupt.h>
++#include <linux/irqchip/chained_irq.h>
++#include <linux/irqdomain.h>
++#include <linux/msi.h>
++#include <linux/of_irq.h>
++#include <linux/of_pci.h>
++#include <linux/pci.h>
++
++#include "pcie-iproc.h"
++
++#define IPROC_MSI_INTR_EN_SHIFT 11
++#define IPROC_MSI_INTR_EN BIT(IPROC_MSI_INTR_EN_SHIFT)
++#define IPROC_MSI_INT_N_EVENT_SHIFT 1
++#define IPROC_MSI_INT_N_EVENT BIT(IPROC_MSI_INT_N_EVENT_SHIFT)
++#define IPROC_MSI_EQ_EN_SHIFT 0
++#define IPROC_MSI_EQ_EN BIT(IPROC_MSI_EQ_EN_SHIFT)
++
++#define IPROC_MSI_EQ_MASK 0x3f
++
++/* max number of GIC interrupts */
++#define NR_HW_IRQS 6
++
++/* number of entries in each event queue */
++#define EQ_LEN 64
++
++/* size of each event queue memory region */
++#define EQ_MEM_REGION_SIZE SZ_4K
++
++/* size of each MSI address region */
++#define MSI_MEM_REGION_SIZE SZ_4K
++
++enum iproc_msi_reg {
++ IPROC_MSI_EQ_PAGE = 0,
++ IPROC_MSI_EQ_PAGE_UPPER,
++ IPROC_MSI_PAGE,
++ IPROC_MSI_PAGE_UPPER,
++ IPROC_MSI_CTRL,
++ IPROC_MSI_EQ_HEAD,
++ IPROC_MSI_EQ_TAIL,
++ IPROC_MSI_INTS_EN,
++ IPROC_MSI_REG_SIZE,
++};
++
++struct iproc_msi;
++
++/**
++ * iProc MSI group
++ *
++ * One MSI group is allocated per GIC interrupt, serviced by one iProc MSI
++ * event queue
++ *
++ * @msi: pointer to iProc MSI data
++ * @gic_irq: GIC interrupt
++ * @eq: Event queue number
++ */
++struct iproc_msi_grp {
++ struct iproc_msi *msi;
++ int gic_irq;
++ unsigned int eq;
++};
++
++/**
++ * iProc event queue based MSI
++ *
++ * Only meant to be used on platforms without MSI support integrated into the
++ * GIC
++ *
++ * @pcie: pointer to iProc PCIe data
++ * @reg_offsets: MSI register offsets
++ * @grps: MSI groups
++ * @nr_irqs: number of total interrupts connected to GIC
++ * @nr_cpus: number of toal CPUs
++ * @has_inten_reg: indicates the MSI interrupt enable register needs to be
++ * set explicitly (required for some legacy platforms)
++ * @bitmap: MSI vector bitmap
++ * @bitmap_lock: lock to protect access to the MSI bitmap
++ * @nr_msi_vecs: total number of MSI vectors
++ * @inner_domain: inner IRQ domain
++ * @msi_domain: MSI IRQ domain
++ * @nr_eq_region: required number of 4K aligned memory region for MSI event
++ * queues
++ * @nr_msi_region: required number of 4K aligned address region for MSI posted
++ * writes
++ * @eq_cpu: pointer to allocated memory region for MSI event queues
++ * @eq_dma: DMA address of MSI event queues
++ * @msi_addr: MSI address
++ */
++struct iproc_msi {
++ struct iproc_pcie *pcie;
++ const u16 (*reg_offsets)[IPROC_MSI_REG_SIZE];
++ struct iproc_msi_grp *grps;
++ int nr_irqs;
++ int nr_cpus;
++ bool has_inten_reg;
++ unsigned long *bitmap;
++ struct mutex bitmap_lock;
++ unsigned int nr_msi_vecs;
++ struct irq_domain *inner_domain;
++ struct irq_domain *msi_domain;
++ unsigned int nr_eq_region;
++ unsigned int nr_msi_region;
++ void *eq_cpu;
++ dma_addr_t eq_dma;
++ phys_addr_t msi_addr;
++};
++
++static const u16 iproc_msi_reg_paxb[NR_HW_IRQS][IPROC_MSI_REG_SIZE] = {
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x210, 0x250, 0x254, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x214, 0x258, 0x25c, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x218, 0x260, 0x264, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x21c, 0x268, 0x26c, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x220, 0x270, 0x274, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x224, 0x278, 0x27c, 0x208 },
++};
++
++static const u16 iproc_msi_reg_paxc[NR_HW_IRQS][IPROC_MSI_REG_SIZE] = {
++ { 0xc00, 0xc04, 0xc08, 0xc0c, 0xc40, 0xc50, 0xc60 },
++ { 0xc10, 0xc14, 0xc18, 0xc1c, 0xc44, 0xc54, 0xc64 },
++ { 0xc20, 0xc24, 0xc28, 0xc2c, 0xc48, 0xc58, 0xc68 },
++ { 0xc30, 0xc34, 0xc38, 0xc3c, 0xc4c, 0xc5c, 0xc6c },
++};
++
++static inline u32 iproc_msi_read_reg(struct iproc_msi *msi,
++ enum iproc_msi_reg reg,
++ unsigned int eq)
++{
++ struct iproc_pcie *pcie = msi->pcie;
++
++ return readl_relaxed(pcie->base + msi->reg_offsets[eq][reg]);
++}
++
++static inline void iproc_msi_write_reg(struct iproc_msi *msi,
++ enum iproc_msi_reg reg,
++ int eq, u32 val)
++{
++ struct iproc_pcie *pcie = msi->pcie;
++
++ writel_relaxed(val, pcie->base + msi->reg_offsets[eq][reg]);
++}
++
++static inline u32 hwirq_to_group(struct iproc_msi *msi, unsigned long hwirq)
++{
++ return (hwirq % msi->nr_irqs);
++}
++
++static inline unsigned int iproc_msi_addr_offset(struct iproc_msi *msi,
++ unsigned long hwirq)
++{
++ if (msi->nr_msi_region > 1)
++ return hwirq_to_group(msi, hwirq) * MSI_MEM_REGION_SIZE;
++ else
++ return hwirq_to_group(msi, hwirq) * sizeof(u32);
++}
++
++static inline unsigned int iproc_msi_eq_offset(struct iproc_msi *msi, u32 eq)
++{
++ if (msi->nr_eq_region > 1)
++ return eq * EQ_MEM_REGION_SIZE;
++ else
++ return eq * EQ_LEN * sizeof(u32);
++}
++
++static struct irq_chip iproc_msi_irq_chip = {
++ .name = "iProc-MSI",
++};
++
++static struct msi_domain_info iproc_msi_domain_info = {
++ .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
++ MSI_FLAG_PCI_MSIX,
++ .chip = &iproc_msi_irq_chip,
++};
++
++/*
++ * In iProc PCIe core, each MSI group is serviced by a GIC interrupt and a
++ * dedicated event queue. Each MSI group can support up to 64 MSI vectors
++ *
++ * The number of MSI groups varies between different iProc SoCs. The total
++ * number of CPU cores also varies. To support MSI IRQ affinity, we
++ * distribute GIC interrupts across all available CPUs. MSI vector is moved
++ * from one GIC interrupt to another to steer to the target CPU
++ *
++ * Assuming:
++ * - the number of MSI groups is M
++ * - the number of CPU cores is N
++ * - M is always a multiple of N
++ *
++ * Total number of raw MSI vectors = M * 64
++ * Total number of supported MSI vectors = (M * 64) / N
++ */
++static inline int hwirq_to_cpu(struct iproc_msi *msi, unsigned long hwirq)
++{
++ return (hwirq % msi->nr_cpus);
++}
++
++static inline unsigned long hwirq_to_canonical_hwirq(struct iproc_msi *msi,
++ unsigned long hwirq)
++{
++ return (hwirq - hwirq_to_cpu(msi, hwirq));
++}
++
++static int iproc_msi_irq_set_affinity(struct irq_data *data,
++ const struct cpumask *mask, bool force)
++{
++ struct iproc_msi *msi = irq_data_get_irq_chip_data(data);
++ int target_cpu = cpumask_first(mask);
++ int curr_cpu;
++
++ curr_cpu = hwirq_to_cpu(msi, data->hwirq);
++ if (curr_cpu == target_cpu)
++ return IRQ_SET_MASK_OK_DONE;
++
++ /* steer MSI to the target CPU */
++ data->hwirq = hwirq_to_canonical_hwirq(msi, data->hwirq) + target_cpu;
++
++ return IRQ_SET_MASK_OK;
++}
++
++static void iproc_msi_irq_compose_msi_msg(struct irq_data *data,
++ struct msi_msg *msg)
++{
++ struct iproc_msi *msi = irq_data_get_irq_chip_data(data);
++ dma_addr_t addr;
++
++ addr = msi->msi_addr + iproc_msi_addr_offset(msi, data->hwirq);
++ msg->address_lo = lower_32_bits(addr);
++ msg->address_hi = upper_32_bits(addr);
++ msg->data = data->hwirq;
++}
++
++static struct irq_chip iproc_msi_bottom_irq_chip = {
++ .name = "MSI",
++ .irq_set_affinity = iproc_msi_irq_set_affinity,
++ .irq_compose_msi_msg = iproc_msi_irq_compose_msi_msg,
++};
++
++static int iproc_msi_irq_domain_alloc(struct irq_domain *domain,
++ unsigned int virq, unsigned int nr_irqs,
++ void *args)
++{
++ struct iproc_msi *msi = domain->host_data;
++ int hwirq;
++
++ mutex_lock(&msi->bitmap_lock);
++
++ /* allocate 'nr_cpus' number of MSI vectors each time */
++ hwirq = bitmap_find_next_zero_area(msi->bitmap, msi->nr_msi_vecs, 0,
++ msi->nr_cpus, 0);
++ if (hwirq < msi->nr_msi_vecs) {
++ bitmap_set(msi->bitmap, hwirq, msi->nr_cpus);
++ } else {
++ mutex_unlock(&msi->bitmap_lock);
++ return -ENOSPC;
++ }
++
++ mutex_unlock(&msi->bitmap_lock);
++
++ irq_domain_set_info(domain, virq, hwirq, &iproc_msi_bottom_irq_chip,
++ domain->host_data, handle_simple_irq, NULL, NULL);
++
++ return 0;
++}
++
++static void iproc_msi_irq_domain_free(struct irq_domain *domain,
++ unsigned int virq, unsigned int nr_irqs)
++{
++ struct irq_data *data = irq_domain_get_irq_data(domain, virq);
++ struct iproc_msi *msi = irq_data_get_irq_chip_data(data);
++ unsigned int hwirq;
++
++ mutex_lock(&msi->bitmap_lock);
++
++ hwirq = hwirq_to_canonical_hwirq(msi, data->hwirq);
++ bitmap_clear(msi->bitmap, hwirq, msi->nr_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 = iproc_msi_irq_domain_alloc,
++ .free = iproc_msi_irq_domain_free,
++};
++
++static inline u32 decode_msi_hwirq(struct iproc_msi *msi, u32 eq, u32 head)
++{
++ u32 *msg, hwirq;
++ unsigned int offs;
++
++ offs = iproc_msi_eq_offset(msi, eq) + head * sizeof(u32);
++ msg = (u32 *)(msi->eq_cpu + offs);
++ hwirq = *msg & IPROC_MSI_EQ_MASK;
++
++ /*
++ * Since we have multiple hwirq mapped to a single MSI vector,
++ * now we need to derive the hwirq at CPU0. It can then be used to
++ * mapped back to virq
++ */
++ return hwirq_to_canonical_hwirq(msi, hwirq);
++}
++
++static void iproc_msi_handler(struct irq_desc *desc)
++{
++ struct irq_chip *chip = irq_desc_get_chip(desc);
++ struct iproc_msi_grp *grp;
++ struct iproc_msi *msi;
++ struct iproc_pcie *pcie;
++ u32 eq, head, tail, nr_events;
++ unsigned long hwirq;
++ int virq;
++
++ chained_irq_enter(chip, desc);
++
++ grp = irq_desc_get_handler_data(desc);
++ msi = grp->msi;
++ pcie = msi->pcie;
++ eq = grp->eq;
++
++ /*
++ * iProc MSI event queue is tracked by head and tail pointers. Head
++ * pointer indicates the next entry (MSI data) to be consumed by SW in
++ * the queue and needs to be updated by SW. iProc MSI core uses the
++ * tail pointer as the next data insertion point
++ *
++ * Entries between head and tail pointers contain valid MSI data. MSI
++ * data is guaranteed to be in the event queue memory before the tail
++ * pointer is updated by the iProc MSI core
++ */
++ head = iproc_msi_read_reg(msi, IPROC_MSI_EQ_HEAD,
++ eq) & IPROC_MSI_EQ_MASK;
++ do {
++ tail = iproc_msi_read_reg(msi, IPROC_MSI_EQ_TAIL,
++ eq) & IPROC_MSI_EQ_MASK;
++
++ /*
++ * Figure out total number of events (MSI data) to be
++ * processed
++ */
++ nr_events = (tail < head) ?
++ (EQ_LEN - (head - tail)) : (tail - head);
++ if (!nr_events)
++ break;
++
++ /* process all outstanding events */
++ while (nr_events--) {
++ hwirq = decode_msi_hwirq(msi, eq, head);
++ virq = irq_find_mapping(msi->inner_domain, hwirq);
++ generic_handle_irq(virq);
++
++ head++;
++ head %= EQ_LEN;
++ }
++
++ /*
++ * Now all outstanding events have been processed. Update the
++ * head pointer
++ */
++ iproc_msi_write_reg(msi, IPROC_MSI_EQ_HEAD, eq, head);
++
++ /*
++ * Now go read the tail pointer again to see if there are new
++ * oustanding events that came in during the above window
++ */
++ } while (true);
++
++ chained_irq_exit(chip, desc);
++}
++
++static void iproc_msi_enable(struct iproc_msi *msi)
++{
++ int i, eq;
++ u32 val;
++
++ /* program memory region for each event queue */
++ for (i = 0; i < msi->nr_eq_region; i++) {
++ dma_addr_t addr = msi->eq_dma + (i * EQ_MEM_REGION_SIZE);
++
++ iproc_msi_write_reg(msi, IPROC_MSI_EQ_PAGE, i,
++ lower_32_bits(addr));
++ iproc_msi_write_reg(msi, IPROC_MSI_EQ_PAGE_UPPER, i,
++ upper_32_bits(addr));
++ }
++
++ /* program address region for MSI posted writes */
++ for (i = 0; i < msi->nr_msi_region; i++) {
++ phys_addr_t addr = msi->msi_addr + (i * MSI_MEM_REGION_SIZE);
++
++ iproc_msi_write_reg(msi, IPROC_MSI_PAGE, i,
++ lower_32_bits(addr));
++ iproc_msi_write_reg(msi, IPROC_MSI_PAGE_UPPER, i,
++ upper_32_bits(addr));
++ }
++
++ for (eq = 0; eq < msi->nr_irqs; eq++) {
++ /* enable MSI event queue */
++ val = IPROC_MSI_INTR_EN | IPROC_MSI_INT_N_EVENT |
++ IPROC_MSI_EQ_EN;
++ iproc_msi_write_reg(msi, IPROC_MSI_CTRL, eq, val);
++
++ /*
++ * Some legacy platforms require the MSI interrupt enable
++ * register to be set explicitly
++ */
++ if (msi->has_inten_reg) {
++ val = iproc_msi_read_reg(msi, IPROC_MSI_INTS_EN, eq);
++ val |= BIT(eq);
++ iproc_msi_write_reg(msi, IPROC_MSI_INTS_EN, eq, val);
++ }
++ }
++}
++
++static void iproc_msi_disable(struct iproc_msi *msi)
++{
++ u32 eq, val;
++
++ for (eq = 0; eq < msi->nr_irqs; eq++) {
++ if (msi->has_inten_reg) {
++ val = iproc_msi_read_reg(msi, IPROC_MSI_INTS_EN, eq);
++ val &= ~BIT(eq);
++ iproc_msi_write_reg(msi, IPROC_MSI_INTS_EN, eq, val);
++ }
++
++ val = iproc_msi_read_reg(msi, IPROC_MSI_CTRL, eq);
++ val &= ~(IPROC_MSI_INTR_EN | IPROC_MSI_INT_N_EVENT |
++ IPROC_MSI_EQ_EN);
++ iproc_msi_write_reg(msi, IPROC_MSI_CTRL, eq, val);
++ }
++}
++
++static int iproc_msi_alloc_domains(struct device_node *node,
++ struct iproc_msi *msi)
++{
++ msi->inner_domain = irq_domain_add_linear(NULL, msi->nr_msi_vecs,
++ &msi_domain_ops, msi);
++ if (!msi->inner_domain)
++ return -ENOMEM;
++
++ msi->msi_domain = pci_msi_create_irq_domain(of_node_to_fwnode(node),
++ &iproc_msi_domain_info,
++ msi->inner_domain);
++ if (!msi->msi_domain) {
++ irq_domain_remove(msi->inner_domain);
++ return -ENOMEM;
++ }
++
++ return 0;
++}
++
++static void iproc_msi_free_domains(struct iproc_msi *msi)
++{
++ if (msi->msi_domain)
++ irq_domain_remove(msi->msi_domain);
++
++ if (msi->inner_domain)
++ irq_domain_remove(msi->inner_domain);
++}
++
++static void iproc_msi_irq_free(struct iproc_msi *msi, unsigned int cpu)
++{
++ int i;
++
++ for (i = cpu; i < msi->nr_irqs; i += msi->nr_cpus) {
++ irq_set_chained_handler_and_data(msi->grps[i].gic_irq,
++ NULL, NULL);
++ }
++}
++
++static int iproc_msi_irq_setup(struct iproc_msi *msi, unsigned int cpu)
++{
++ int i, ret;
++ cpumask_var_t mask;
++ struct iproc_pcie *pcie = msi->pcie;
++
++ for (i = cpu; i < msi->nr_irqs; i += msi->nr_cpus) {
++ irq_set_chained_handler_and_data(msi->grps[i].gic_irq,
++ iproc_msi_handler,
++ &msi->grps[i]);
++ /* dedicate GIC interrupt to each CPU core */
++ if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
++ cpumask_clear(mask);
++ cpumask_set_cpu(cpu, mask);
++ ret = irq_set_affinity(msi->grps[i].gic_irq, mask);
++ if (ret)
++ dev_err(pcie->dev,
++ "failed to set affinity for IRQ%d\n",
++ msi->grps[i].gic_irq);
++ free_cpumask_var(mask);
++ } else {
++ dev_err(pcie->dev, "failed to alloc CPU mask\n");
++ ret = -EINVAL;
++ }
++
++ if (ret) {
++ /* free all configured/unconfigured irqs */
++ iproc_msi_irq_free(msi, cpu);
++ return ret;
++ }
++ }
++
++ return 0;
++}
++
++int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node)
++{
++ struct iproc_msi *msi;
++ int i, ret;
++ unsigned int cpu;
++
++ if (!of_device_is_compatible(node, "brcm,iproc-msi"))
++ return -ENODEV;
++
++ if (!of_find_property(node, "msi-controller", NULL))
++ return -ENODEV;
++
++ if (pcie->msi)
++ return -EBUSY;
++
++ msi = devm_kzalloc(pcie->dev, sizeof(*msi), GFP_KERNEL);
++ if (!msi)
++ return -ENOMEM;
++
++ msi->pcie = pcie;
++ pcie->msi = msi;
++ msi->msi_addr = pcie->base_addr;
++ mutex_init(&msi->bitmap_lock);
++ msi->nr_cpus = num_possible_cpus();
++
++ msi->nr_irqs = of_irq_count(node);
++ if (!msi->nr_irqs) {
++ dev_err(pcie->dev, "found no MSI GIC interrupt\n");
++ return -ENODEV;
++ }
++
++ if (msi->nr_irqs > NR_HW_IRQS) {
++ dev_warn(pcie->dev, "too many MSI GIC interrupts defined %d\n",
++ msi->nr_irqs);
++ msi->nr_irqs = NR_HW_IRQS;
++ }
++
++ if (msi->nr_irqs < msi->nr_cpus) {
++ dev_err(pcie->dev,
++ "not enough GIC interrupts for MSI affinity\n");
++ return -EINVAL;
++ }
++
++ if (msi->nr_irqs % msi->nr_cpus != 0) {
++ msi->nr_irqs -= msi->nr_irqs % msi->nr_cpus;
++ dev_warn(pcie->dev, "Reducing number of interrupts to %d\n",
++ msi->nr_irqs);
++ }
++
++ switch (pcie->type) {
++ case IPROC_PCIE_PAXB:
++ msi->reg_offsets = iproc_msi_reg_paxb;
++ msi->nr_eq_region = 1;
++ msi->nr_msi_region = 1;
++ break;
++ case IPROC_PCIE_PAXC:
++ msi->reg_offsets = iproc_msi_reg_paxc;
++ msi->nr_eq_region = msi->nr_irqs;
++ msi->nr_msi_region = msi->nr_irqs;
++ break;
++ default:
++ dev_err(pcie->dev, "incompatible iProc PCIe interface\n");
++ return -EINVAL;
++ }
++
++ if (of_find_property(node, "brcm,pcie-msi-inten", NULL))
++ msi->has_inten_reg = true;
++
++ msi->nr_msi_vecs = msi->nr_irqs * EQ_LEN;
++ msi->bitmap = devm_kcalloc(pcie->dev, BITS_TO_LONGS(msi->nr_msi_vecs),
++ sizeof(*msi->bitmap), GFP_KERNEL);
++ if (!msi->bitmap)
++ return -ENOMEM;
++
++ msi->grps = devm_kcalloc(pcie->dev, msi->nr_irqs, sizeof(*msi->grps),
++ GFP_KERNEL);
++ if (!msi->grps)
++ return -ENOMEM;
++
++ for (i = 0; i < msi->nr_irqs; i++) {
++ unsigned int irq = irq_of_parse_and_map(node, i);
++
++ if (!irq) {
++ dev_err(pcie->dev, "unable to parse/map interrupt\n");
++ ret = -ENODEV;
++ goto free_irqs;
++ }
++ msi->grps[i].gic_irq = irq;
++ msi->grps[i].msi = msi;
++ msi->grps[i].eq = i;
++ }
++
++ /* reserve memory for event queue and make sure memories are zeroed */
++ msi->eq_cpu = dma_zalloc_coherent(pcie->dev,
++ msi->nr_eq_region * EQ_MEM_REGION_SIZE,
++ &msi->eq_dma, GFP_KERNEL);
++ if (!msi->eq_cpu) {
++ ret = -ENOMEM;
++ goto free_irqs;
++ }
++
++ ret = iproc_msi_alloc_domains(node, msi);
++ if (ret) {
++ dev_err(pcie->dev, "failed to create MSI domains\n");
++ goto free_eq_dma;
++ }
++
++ for_each_online_cpu(cpu) {
++ ret = iproc_msi_irq_setup(msi, cpu);
++ if (ret)
++ goto free_msi_irq;
++ }
++
++ iproc_msi_enable(msi);
++
++ return 0;
++
++free_msi_irq:
++ for_each_online_cpu(cpu)
++ iproc_msi_irq_free(msi, cpu);
++ iproc_msi_free_domains(msi);
++
++free_eq_dma:
++ dma_free_coherent(pcie->dev, msi->nr_eq_region * EQ_MEM_REGION_SIZE,
++ msi->eq_cpu, msi->eq_dma);
++
++free_irqs:
++ for (i = 0; i < msi->nr_irqs; i++) {
++ if (msi->grps[i].gic_irq)
++ irq_dispose_mapping(msi->grps[i].gic_irq);
++ }
++ pcie->msi = NULL;
++ return ret;
++}
++EXPORT_SYMBOL(iproc_msi_init);
++
++void iproc_msi_exit(struct iproc_pcie *pcie)
++{
++ struct iproc_msi *msi = pcie->msi;
++ unsigned int i, cpu;
++
++ if (!msi)
++ return;
++
++ iproc_msi_disable(msi);
++
++ for_each_online_cpu(cpu)
++ iproc_msi_irq_free(msi, cpu);
++
++ iproc_msi_free_domains(msi);
++
++ dma_free_coherent(pcie->dev, msi->nr_eq_region * EQ_MEM_REGION_SIZE,
++ msi->eq_cpu, msi->eq_dma);
++
++ for (i = 0; i < msi->nr_irqs; i++) {
++ if (msi->grps[i].gic_irq)
++ irq_dispose_mapping(msi->grps[i].gic_irq);
++ }
++}
++EXPORT_SYMBOL(iproc_msi_exit);
+--- a/drivers/pci/host/pcie-iproc-platform.c
++++ b/drivers/pci/host/pcie-iproc-platform.c
+@@ -71,6 +71,7 @@ static int iproc_pcie_pltfm_probe(struct
+ dev_err(pcie->dev, "unable to map controller registers\n");
+ return -ENOMEM;
+ }
++ pcie->base_addr = reg.start;
+
+ if (of_property_read_bool(np, "brcm,pcie-ob")) {
+ u32 val;
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -440,6 +440,26 @@ static int iproc_pcie_map_ranges(struct
+ return 0;
+ }
+
++static int iproc_pcie_msi_enable(struct iproc_pcie *pcie)
++{
++ struct device_node *msi_node;
++
++ msi_node = of_parse_phandle(pcie->dev->of_node, "msi-parent", 0);
++ if (!msi_node)
++ return -ENODEV;
++
++ /*
++ * If another MSI controller is being used, the call below should fail
++ * but that is okay
++ */
++ return iproc_msi_init(pcie, msi_node);
++}
++
++static void iproc_pcie_msi_disable(struct iproc_pcie *pcie)
++{
++ iproc_msi_exit(pcie);
++}
++
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
+ {
+ int ret;
+@@ -506,6 +526,10 @@ int iproc_pcie_setup(struct iproc_pcie *
+
+ iproc_pcie_enable(pcie);
+
++ if (IS_ENABLED(CONFIG_PCI_MSI))
++ if (iproc_pcie_msi_enable(pcie))
++ dev_info(pcie->dev, "not using iProc MSI\n");
++
+ pci_scan_child_bus(bus);
+ pci_assign_unassigned_bus_resources(bus);
+ pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
+@@ -530,6 +554,8 @@ int iproc_pcie_remove(struct iproc_pcie
+ pci_stop_root_bus(pcie->root_bus);
+ pci_remove_root_bus(pcie->root_bus);
+
++ iproc_pcie_msi_disable(pcie);
++
+ phy_power_off(pcie->phy);
+ phy_exit(pcie->phy);
+
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -41,6 +41,8 @@ struct iproc_pcie_ob {
+ resource_size_t window_size;
+ };
+
++struct iproc_msi;
++
+ /**
+ * iProc PCIe device
+ *
+@@ -48,19 +50,21 @@ struct iproc_pcie_ob {
+ * @type: iProc PCIe interface type
+ * @reg_offsets: register offsets
+ * @base: PCIe host controller I/O register base
++ * @base_addr: PCIe host controller register base physical address
+ * @sysdata: Per PCI controller data (ARM-specific)
+ * @root_bus: pointer to root bus
+ * @phy: optional PHY device that controls the Serdes
+- * @irqs: interrupt IDs
+ * @map_irq: function callback to map interrupts
+- * @need_ob_cfg: indidates SW needs to configure the outbound mapping window
++ * @need_ob_cfg: indicates SW needs to configure the outbound mapping window
+ * @ob: outbound mapping parameters
++ * @msi: MSI data
+ */
+ struct iproc_pcie {
+ struct device *dev;
+ enum iproc_pcie_type type;
+ const u16 *reg_offsets;
+ void __iomem *base;
++ phys_addr_t base_addr;
+ #ifdef CONFIG_ARM
+ struct pci_sys_data sysdata;
+ #endif
+@@ -69,9 +73,24 @@ struct iproc_pcie {
+ int (*map_irq)(const struct pci_dev *, u8, u8);
+ bool need_ob_cfg;
+ struct iproc_pcie_ob ob;
++ struct iproc_msi *msi;
+ };
+
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
+ int iproc_pcie_remove(struct iproc_pcie *pcie);
+
++#ifdef CONFIG_PCI_MSI
++int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node);
++void iproc_msi_exit(struct iproc_pcie *pcie);
++#else
++static inline int iproc_msi_init(struct iproc_pcie *pcie,
++ struct device_node *node)
++{
++ return -ENODEV;
++}
++static void iproc_msi_exit(struct iproc_pcie *pcie)
++{
++}
++#endif
++
+ #endif /* _PCIE_IPROC_H */
--- /dev/null
+From 5d92f41c48c5e3c6fa5be87e3d6fca57e2fbb127 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:15 -0700
+Subject: [PATCH 140/147] PCI: iproc: Fix code comment to match code
+
+Fix code comment in pcie-iproc.h so it matches the code.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -20,11 +20,11 @@
+ * iProc PCIe device
+ * @dev: pointer to device data structure
+ * @base: PCIe host controller I/O register base
+- * @resources: linked list of all PCI resources
+ * @sysdata: Per PCI controller data (ARM-specific)
+ * @root_bus: pointer to root bus
+ * @phy: optional PHY device that controls the Serdes
+ * @irqs: interrupt IDs
++ * @map_irq: function callback to map interrupts
+ */
+ struct iproc_pcie {
+ struct device *dev;
--- /dev/null
+From 98aac697a83db6e1d004e5d61cf6c976a0b1c35a Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:16 -0700
+Subject: [PATCH 141/147] PCI: iproc: Remove unused struct iproc_pcie.irqs[]
+
+Remove unused struct iproc_pcie member irqs[] and unused #define
+IPROC_PCIE_MAX_NUM_IRQS.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.h | 3 ---
+ 1 file changed, 3 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -14,8 +14,6 @@
+ #ifndef _PCIE_IPROC_H
+ #define _PCIE_IPROC_H
+
+-#define IPROC_PCIE_MAX_NUM_IRQS 6
+-
+ /**
+ * iProc PCIe device
+ * @dev: pointer to device data structure
+@@ -34,7 +32,6 @@ struct iproc_pcie {
+ #endif
+ struct pci_bus *root_bus;
+ struct phy *phy;
+- int irqs[IPROC_PCIE_MAX_NUM_IRQS];
+ int (*map_irq)(const struct pci_dev *, u8, u8);
+ };
+
--- /dev/null
+From bdb8a1844f3113ec08915d1e8e3fd5686fb2fb78 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:17 -0700
+Subject: [PATCH 142/147] PCI: iproc: Call pci_fixup_irqs() for ARM64 as well
+ as ARM
+
+After 459a07721c11 ("PCI: Build setup-irq.o for arm64"), we build
+setup-irq.o for arm64, so we can use pci_fixup_irqs() on both arm and
+arm64.
+
+Remove the "#ifdef CONFIG_ARM" around the call to pci_fixup_irqs().
+
+[bhelgaas: changelog]
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.c | 2 --
+ 1 file changed, 2 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -238,9 +238,7 @@ int iproc_pcie_setup(struct iproc_pcie *
+
+ pci_scan_child_bus(bus);
+ pci_assign_unassigned_bus_resources(bus);
+-#ifdef CONFIG_ARM
+ pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
+-#endif
+ pci_bus_add_devices(bus);
+
+ return 0;
--- /dev/null
+From 199ff14100095d52cd1b232cc0f3b12f348b5b07 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:18 -0700
+Subject: [PATCH 143/147] PCI: iproc: Fix PCIe reset logic
+
+The current reset logic does not always properly reset the device. For
+example, in the case when the perst_b signal is already de-asserted in the
+bootloader, the current reset logic fails to trigger a proper assert ->
+de-assert reset sequence.
+
+Fix the issue by always triggering the proper reset sequence.
+
+Also explicitly select the desired reset source, i.e., perst_b, and reduce
+the wait time after the device comes out of reset from 250 ms to 100 ms,
+based on recommendation from the ASIC team.
+
+Tested-by: Vladimir Dreizin <vdreizin@broadcom.com>
+Tested-by: Darren Edamura <dedamura@broadcom.com>
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+Reviewed-by: Vladimir Dreizin <vdreizin@broadcom.com>
+Reviewed-by: Trac Hoang <trhoang@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc.c | 15 ++++++++++-----
+ 1 file changed, 10 insertions(+), 5 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -31,6 +31,8 @@
+ #include "pcie-iproc.h"
+
+ #define CLK_CONTROL_OFFSET 0x000
++#define EP_PERST_SOURCE_SELECT_SHIFT 2
++#define EP_PERST_SOURCE_SELECT BIT(EP_PERST_SOURCE_SELECT_SHIFT)
+ #define EP_MODE_SURVIVE_PERST_SHIFT 1
+ #define EP_MODE_SURVIVE_PERST BIT(EP_MODE_SURVIVE_PERST_SHIFT)
+ #define RC_PCIE_RST_OUTPUT_SHIFT 0
+@@ -119,15 +121,18 @@ static void iproc_pcie_reset(struct ipro
+ u32 val;
+
+ /*
+- * Configure the PCIe controller as root complex and send a downstream
+- * reset
++ * Select perst_b signal as reset source. Put the device into reset,
++ * and then bring it out of reset
+ */
+- val = EP_MODE_SURVIVE_PERST | RC_PCIE_RST_OUTPUT;
++ val = readl(pcie->base + CLK_CONTROL_OFFSET);
++ val &= ~EP_PERST_SOURCE_SELECT & ~EP_MODE_SURVIVE_PERST &
++ ~RC_PCIE_RST_OUTPUT;
+ writel(val, pcie->base + CLK_CONTROL_OFFSET);
+ udelay(250);
+- val &= ~EP_MODE_SURVIVE_PERST;
++
++ val |= RC_PCIE_RST_OUTPUT;
+ writel(val, pcie->base + CLK_CONTROL_OFFSET);
+- msleep(250);
++ msleep(100);
+ }
+
+ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
--- /dev/null
+From aaf22ab4e916afa68a2e1aed4e913b76cbd58276 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:19 -0700
+Subject: [PATCH 144/147] PCI: iproc: Improve link detection logic
+
+Improve the link detection logic by explicitly querying the link status
+register to ensure link is active.
+
+Also force class to PCI_CLASS_BRIDGE_PCI (0x0604) through the host
+configuration space register.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+Reviewed-by: Anup Patel <anup.patel@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc.c | 29 +++++++++++++++++++++++------
+ 1 file changed, 23 insertions(+), 6 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -60,6 +60,12 @@
+ #define SYS_RC_INTX_EN 0x330
+ #define SYS_RC_INTX_MASK 0xf
+
++#define PCIE_LINK_STATUS_OFFSET 0xf0c
++#define PCIE_PHYLINKUP_SHIFT 3
++#define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT)
++#define PCIE_DL_ACTIVE_SHIFT 2
++#define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT)
++
+ static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
+ {
+ struct iproc_pcie *pcie;
+@@ -138,9 +144,15 @@ static void iproc_pcie_reset(struct ipro
+ static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
+ {
+ u8 hdr_type;
+- u32 link_ctrl;
++ u32 link_ctrl, class, val;
+ u16 pos, link_status;
+- int link_is_active = 0;
++ bool link_is_active = false;
++
++ val = readl(pcie->base + PCIE_LINK_STATUS_OFFSET);
++ if (!(val & PCIE_PHYLINKUP) || !(val & PCIE_DL_ACTIVE)) {
++ dev_err(pcie->dev, "PHY or data link is INACTIVE!\n");
++ return -ENODEV;
++ }
+
+ /* make sure we are not in EP mode */
+ pci_bus_read_config_byte(bus, 0, PCI_HEADER_TYPE, &hdr_type);
+@@ -150,14 +162,19 @@ static int iproc_pcie_check_link(struct
+ }
+
+ /* force class to PCI_CLASS_BRIDGE_PCI (0x0604) */
+- pci_bus_write_config_word(bus, 0, PCI_CLASS_DEVICE,
+- PCI_CLASS_BRIDGE_PCI);
++#define PCI_BRIDGE_CTRL_REG_OFFSET 0x43c
++#define PCI_CLASS_BRIDGE_MASK 0xffff00
++#define PCI_CLASS_BRIDGE_SHIFT 8
++ pci_bus_read_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, &class);
++ class &= ~PCI_CLASS_BRIDGE_MASK;
++ class |= (PCI_CLASS_BRIDGE_PCI << PCI_CLASS_BRIDGE_SHIFT);
++ pci_bus_write_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, class);
+
+ /* check link status to see if link is active */
+ pos = pci_bus_find_capability(bus, 0, PCI_CAP_ID_EXP);
+ pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA, &link_status);
+ if (link_status & PCI_EXP_LNKSTA_NLW)
+- link_is_active = 1;
++ link_is_active = true;
+
+ if (!link_is_active) {
+ /* try GEN 1 link speed */
+@@ -181,7 +198,7 @@ static int iproc_pcie_check_link(struct
+ pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA,
+ &link_status);
+ if (link_status & PCI_EXP_LNKSTA_NLW)
+- link_is_active = 1;
++ link_is_active = true;
+ }
+ }
+
--- /dev/null
+From 8d0afa1a93be2da954c85392bbc7b2264c9d241c Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 15 Sep 2015 17:39:20 -0700
+Subject: [PATCH 145/147] PCI: iproc: Update PCIe device tree bindings
+
+Update the device tree bindings with added support for outbound mapping
+configurations.
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ .../devicetree/bindings/pci/brcm,iproc-pcie.txt | 20 ++++++++++++++++++++
+ 1 file changed, 20 insertions(+)
+
+--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
++++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
+@@ -17,6 +17,21 @@ Optional properties:
+ - phys: phandle of the PCIe PHY device
+ - phy-names: must be "pcie-phy"
+
++- brcm,pcie-ob: Some iProc SoCs do not have the outbound address mapping done
++by the ASIC after power on reset. In this case, SW needs to configure it
++
++If the brcm,pcie-ob property is present, the following properties become
++effective:
++
++Required:
++- brcm,pcie-ob-axi-offset: The offset from the AXI address to the internal
++address used by the iProc PCIe core (not the PCIe address)
++- brcm,pcie-ob-window-size: The outbound address mapping window size (in MB)
++
++Optional:
++- brcm,pcie-ob-oarr-size: Some iProc SoCs need the OARR size bit to be set to
++increase the outbound window size
++
+ Example:
+ pcie0: pcie@18012000 {
+ compatible = "brcm,iproc-pcie";
+@@ -38,6 +53,11 @@ Example:
+
+ phys = <&phy 0 5>;
+ phy-names = "pcie-phy";
++
++ brcm,pcie-ob;
++ brcm,pcie-ob-oarr-size;
++ brcm,pcie-ob-axi-offset = <0x00000000>;
++ brcm,pcie-ob-window-size = <256>;
+ };
+
+ pcie1: pcie@18013000 {
--- /dev/null
+From e99a187b5c5f60fe55ca586f82ac1a3557fb166a Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Fri, 16 Oct 2015 08:18:24 -0500
+Subject: [PATCH 146/147] PCI: iproc: Add outbound mapping support
+
+Certain SoCs require the PCIe outbound mapping to be configured in
+software. Add support for those chips.
+
+[jonmason: Use %pap format when printing size_t to avoid warnings in 32-bit
+build.]
+[arnd: Use div64_u64() instead of "%" to avoid __aeabi_uldivmod link error
+in 32-bit build.]
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Jon Mason <jonmason@broadcom.com>
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc-platform.c | 27 ++++++++
+ drivers/pci/host/pcie-iproc.c | 115 +++++++++++++++++++++++++++++++++
+ drivers/pci/host/pcie-iproc.h | 17 +++++
+ 3 files changed, 159 insertions(+)
+
+--- a/drivers/pci/host/pcie-iproc-platform.c
++++ b/drivers/pci/host/pcie-iproc-platform.c
+@@ -54,6 +54,33 @@ static int iproc_pcie_pltfm_probe(struct
+ return -ENOMEM;
+ }
+
++ if (of_property_read_bool(np, "brcm,pcie-ob")) {
++ u32 val;
++
++ ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
++ &val);
++ if (ret) {
++ dev_err(pcie->dev,
++ "missing brcm,pcie-ob-axi-offset property\n");
++ return ret;
++ }
++ pcie->ob.axi_offset = val;
++
++ ret = of_property_read_u32(np, "brcm,pcie-ob-window-size",
++ &val);
++ if (ret) {
++ dev_err(pcie->dev,
++ "missing brcm,pcie-ob-window-size property\n");
++ return ret;
++ }
++ pcie->ob.window_size = (resource_size_t)val * SZ_1M;
++
++ if (of_property_read_bool(np, "brcm,pcie-ob-oarr-size"))
++ pcie->ob.set_oarr_size = true;
++
++ pcie->need_ob_cfg = true;
++ }
++
+ /* PHY use is optional */
+ pcie->phy = devm_phy_get(&pdev->dev, "pcie-phy");
+ if (IS_ERR(pcie->phy)) {
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -66,6 +66,18 @@
+ #define PCIE_DL_ACTIVE_SHIFT 2
+ #define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT)
+
++#define OARR_VALID_SHIFT 0
++#define OARR_VALID BIT(OARR_VALID_SHIFT)
++#define OARR_SIZE_CFG_SHIFT 1
++#define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
++
++#define OARR_LO(window) (0xd20 + (window) * 8)
++#define OARR_HI(window) (0xd24 + (window) * 8)
++#define OMAP_LO(window) (0xd40 + (window) * 8)
++#define OMAP_HI(window) (0xd44 + (window) * 8)
++
++#define MAX_NUM_OB_WINDOWS 2
++
+ static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
+ {
+ struct iproc_pcie *pcie;
+@@ -212,6 +224,101 @@ static void iproc_pcie_enable(struct ipr
+ writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN);
+ }
+
++/**
++ * Some iProc SoCs require the SW to configure the outbound address mapping
++ *
++ * Outbound address translation:
++ *
++ * iproc_pcie_address = axi_address - axi_offset
++ * OARR = iproc_pcie_address
++ * OMAP = pci_addr
++ *
++ * axi_addr -> iproc_pcie_address -> OARR -> OMAP -> pci_address
++ */
++static int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
++ u64 pci_addr, resource_size_t size)
++{
++ struct iproc_pcie_ob *ob = &pcie->ob;
++ unsigned i;
++ u64 max_size = (u64)ob->window_size * MAX_NUM_OB_WINDOWS;
++ u64 remainder;
++
++ if (size > max_size) {
++ dev_err(pcie->dev,
++ "res size 0x%pap exceeds max supported size 0x%llx\n",
++ &size, max_size);
++ return -EINVAL;
++ }
++
++ div64_u64_rem(size, ob->window_size, &remainder);
++ if (remainder) {
++ dev_err(pcie->dev,
++ "res size %pap needs to be multiple of window size %pap\n",
++ &size, &ob->window_size);
++ return -EINVAL;
++ }
++
++ if (axi_addr < ob->axi_offset) {
++ dev_err(pcie->dev,
++ "axi address %pap less than offset %pap\n",
++ &axi_addr, &ob->axi_offset);
++ return -EINVAL;
++ }
++
++ /*
++ * Translate the AXI address to the internal address used by the iProc
++ * PCIe core before programming the OARR
++ */
++ axi_addr -= ob->axi_offset;
++
++ for (i = 0; i < MAX_NUM_OB_WINDOWS; i++) {
++ writel(lower_32_bits(axi_addr) | OARR_VALID |
++ (ob->set_oarr_size ? 1 : 0), pcie->base + OARR_LO(i));
++ writel(upper_32_bits(axi_addr), pcie->base + OARR_HI(i));
++ writel(lower_32_bits(pci_addr), pcie->base + OMAP_LO(i));
++ writel(upper_32_bits(pci_addr), pcie->base + OMAP_HI(i));
++
++ size -= ob->window_size;
++ if (size == 0)
++ break;
++
++ axi_addr += ob->window_size;
++ pci_addr += ob->window_size;
++ }
++
++ return 0;
++}
++
++static int iproc_pcie_map_ranges(struct iproc_pcie *pcie,
++ struct list_head *resources)
++{
++ struct resource_entry *window;
++ int ret;
++
++ resource_list_for_each_entry(window, resources) {
++ struct resource *res = window->res;
++ u64 res_type = resource_type(res);
++
++ switch (res_type) {
++ case IORESOURCE_IO:
++ case IORESOURCE_BUS:
++ break;
++ case IORESOURCE_MEM:
++ ret = iproc_pcie_setup_ob(pcie, res->start,
++ res->start - window->offset,
++ resource_size(res));
++ if (ret)
++ return ret;
++ break;
++ default:
++ dev_err(pcie->dev, "invalid resource %pR\n", res);
++ return -EINVAL;
++ }
++ }
++
++ return 0;
++}
++
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
+ {
+ int ret;
+@@ -235,6 +342,14 @@ int iproc_pcie_setup(struct iproc_pcie *
+
+ iproc_pcie_reset(pcie);
+
++ if (pcie->need_ob_cfg) {
++ ret = iproc_pcie_map_ranges(pcie, res);
++ if (ret) {
++ dev_err(pcie->dev, "map failed\n");
++ goto err_power_off_phy;
++ }
++ }
++
+ #ifdef CONFIG_ARM
+ pcie->sysdata.private_data = pcie;
+ sysdata = &pcie->sysdata;
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -15,6 +15,19 @@
+ #define _PCIE_IPROC_H
+
+ /**
++ * iProc PCIe outbound mapping
++ * @set_oarr_size: indicates the OARR size bit needs to be set
++ * @axi_offset: offset from the AXI address to the internal address used by
++ * the iProc PCIe core
++ * @window_size: outbound window size
++ */
++struct iproc_pcie_ob {
++ bool set_oarr_size;
++ resource_size_t axi_offset;
++ resource_size_t window_size;
++};
++
++/**
+ * iProc PCIe device
+ * @dev: pointer to device data structure
+ * @base: PCIe host controller I/O register base
+@@ -23,6 +36,8 @@
+ * @phy: optional PHY device that controls the Serdes
+ * @irqs: interrupt IDs
+ * @map_irq: function callback to map interrupts
++ * @need_ob_cfg: indidates SW needs to configure the outbound mapping window
++ * @ob: outbound mapping parameters
+ */
+ struct iproc_pcie {
+ struct device *dev;
+@@ -33,6 +48,8 @@ struct iproc_pcie {
+ struct pci_bus *root_bus;
+ struct phy *phy;
+ int (*map_irq)(const struct pci_dev *, u8, u8);
++ bool need_ob_cfg;
++ struct iproc_pcie_ob ob;
+ };
+
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
--- /dev/null
+From be908d21b2e9c2cab1ef568dfca4f9777611b3dd Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <f.fainelli@gmail.com>
+Date: Fri, 16 Oct 2015 12:04:04 -0700
+Subject: [PATCH 147/147] PCI: iproc: Fix header comment "Corporation"
+ misspelling
+
+Fix an obvious "Broadcom Corporation" typo in a header comment.
+
+Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+Acked-by: Ray Jui <rjui@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -1,6 +1,6 @@
+ /*
+ * Copyright (C) 2014 Hauke Mehrtens <hauke@hauke-m.de>
+- * Copyright (C) 2015 Broadcom Corporatcommon ion
++ * Copyright (C) 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
--- /dev/null
+From d85a955118c8d8679d4f746fe2189c172d7c365f Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Mon, 16 Nov 2015 17:18:05 -0800
+Subject: [PATCH 150/154] PCI: iproc: Update iProc PCIe device tree binding
+
+Add a new compatible string "brcm,iproc-pcie-paxc", for PAXC based iProc
+PCIe root complex. A PAXC based PCIe root complex is connected to
+emulated endpoint devices internal to the ASIC
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
++++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
+@@ -1,7 +1,10 @@
+ * Broadcom iProc PCIe controller with the platform bus interface
+
+ Required properties:
+-- compatible: Must be "brcm,iproc-pcie"
++- compatible: Must be "brcm,iproc-pcie" for PAXB, or "brcm,iproc-pcie-paxc"
++ for PAXC. PAXB based root complex is used for external endpoint devices.
++ PAXC based root complex is connected to emulated endpoint devices
++ internal to the ASIC
+ - reg: base address and length of the PCIe controller I/O register space
+ - #interrupt-cells: set to <1>
+ - interrupt-map-mask and interrupt-map, standard PCI properties to define the
--- /dev/null
+From a13fc4733b25d6dad6ec1826f09225c69ee21e3a Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Mon, 16 Nov 2015 17:41:43 -0800
+Subject: [PATCH 151/154] PCI: iproc: Add PAXC interface support
+
+Traditionally, all iProc PCIe root complexes use PAXB based wrapper,
+with an integrated on-chip Serdes to support external endpoint devices.
+On newer iProc platforms, a PAXC based wrapper is introduced, for
+connection with internally emulated PCIe endpoint devices in the ASIC
+
+This patch adds support for PAXC based iProc PCIe root complex in the
+iProc PCIe core driver. This change fators out common logic between
+PAXB and PAXC, and use tables to store register offsets that are
+different between PAXB and PAXC. This allows the driver to be scaled to
+support subsequent PAXC revisions in the future
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ drivers/pci/host/pcie-iproc-platform.c | 24 +++-
+ drivers/pci/host/pcie-iproc.c | 202 +++++++++++++++++++++++++++------
+ drivers/pci/host/pcie-iproc.h | 19 ++++
+ 3 files changed, 205 insertions(+), 40 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc-platform.c
++++ b/drivers/pci/host/pcie-iproc-platform.c
+@@ -26,8 +26,21 @@
+
+ #include "pcie-iproc.h"
+
++static const struct of_device_id iproc_pcie_of_match_table[] = {
++ {
++ .compatible = "brcm,iproc-pcie",
++ .data = (int *)IPROC_PCIE_PAXB,
++ }, {
++ .compatible = "brcm,iproc-pcie-paxc",
++ .data = (int *)IPROC_PCIE_PAXC,
++ },
++ { /* sentinel */ }
++};
++MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
++
+ static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
+ {
++ const struct of_device_id *of_id;
+ struct iproc_pcie *pcie;
+ struct device_node *np = pdev->dev.of_node;
+ struct resource reg;
+@@ -35,11 +48,16 @@ static int iproc_pcie_pltfm_probe(struct
+ LIST_HEAD(res);
+ int ret;
+
++ of_id = of_match_device(iproc_pcie_of_match_table, &pdev->dev);
++ if (!of_id)
++ return -EINVAL;
++
+ pcie = devm_kzalloc(&pdev->dev, sizeof(struct iproc_pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+
+ pcie->dev = &pdev->dev;
++ pcie->type = (enum iproc_pcie_type)of_id->data;
+ platform_set_drvdata(pdev, pcie);
+
+ ret = of_address_to_resource(np, 0, ®);
+@@ -114,12 +132,6 @@ static int iproc_pcie_pltfm_remove(struc
+ return iproc_pcie_remove(pcie);
+ }
+
+-static const struct of_device_id iproc_pcie_of_match_table[] = {
+- { .compatible = "brcm,iproc-pcie", },
+- { /* sentinel */ }
+-};
+-MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
+-
+ static struct platform_driver iproc_pcie_pltfm_driver = {
+ .driver = {
+ .name = "iproc-pcie",
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -30,20 +30,16 @@
+
+ #include "pcie-iproc.h"
+
+-#define CLK_CONTROL_OFFSET 0x000
+ #define EP_PERST_SOURCE_SELECT_SHIFT 2
+ #define EP_PERST_SOURCE_SELECT BIT(EP_PERST_SOURCE_SELECT_SHIFT)
+ #define EP_MODE_SURVIVE_PERST_SHIFT 1
+ #define EP_MODE_SURVIVE_PERST BIT(EP_MODE_SURVIVE_PERST_SHIFT)
+ #define RC_PCIE_RST_OUTPUT_SHIFT 0
+ #define RC_PCIE_RST_OUTPUT BIT(RC_PCIE_RST_OUTPUT_SHIFT)
++#define PAXC_RESET_MASK 0x7f
+
+-#define CFG_IND_ADDR_OFFSET 0x120
+ #define CFG_IND_ADDR_MASK 0x00001ffc
+
+-#define CFG_IND_DATA_OFFSET 0x124
+-
+-#define CFG_ADDR_OFFSET 0x1f8
+ #define CFG_ADDR_BUS_NUM_SHIFT 20
+ #define CFG_ADDR_BUS_NUM_MASK 0x0ff00000
+ #define CFG_ADDR_DEV_NUM_SHIFT 15
+@@ -55,12 +51,8 @@
+ #define CFG_ADDR_CFG_TYPE_SHIFT 0
+ #define CFG_ADDR_CFG_TYPE_MASK 0x00000003
+
+-#define CFG_DATA_OFFSET 0x1fc
+-
+-#define SYS_RC_INTX_EN 0x330
+ #define SYS_RC_INTX_MASK 0xf
+
+-#define PCIE_LINK_STATUS_OFFSET 0xf0c
+ #define PCIE_PHYLINKUP_SHIFT 3
+ #define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT)
+ #define PCIE_DL_ACTIVE_SHIFT 2
+@@ -71,12 +63,54 @@
+ #define OARR_SIZE_CFG_SHIFT 1
+ #define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
+
+-#define OARR_LO(window) (0xd20 + (window) * 8)
+-#define OARR_HI(window) (0xd24 + (window) * 8)
+-#define OMAP_LO(window) (0xd40 + (window) * 8)
+-#define OMAP_HI(window) (0xd44 + (window) * 8)
+-
+ #define MAX_NUM_OB_WINDOWS 2
++#define MAX_NUM_PAXC_PF 4
++
++#define IPROC_PCIE_REG_INVALID 0xffff
++
++enum iproc_pcie_reg {
++ IPROC_PCIE_CLK_CTRL = 0,
++ IPROC_PCIE_CFG_IND_ADDR,
++ IPROC_PCIE_CFG_IND_DATA,
++ IPROC_PCIE_CFG_ADDR,
++ IPROC_PCIE_CFG_DATA,
++ IPROC_PCIE_INTX_EN,
++ IPROC_PCIE_OARR_LO,
++ IPROC_PCIE_OARR_HI,
++ IPROC_PCIE_OMAP_LO,
++ IPROC_PCIE_OMAP_HI,
++ IPROC_PCIE_LINK_STATUS,
++};
++
++/* iProc PCIe PAXB registers */
++static const u16 iproc_pcie_reg_paxb[] = {
++ [IPROC_PCIE_CLK_CTRL] = 0x000,
++ [IPROC_PCIE_CFG_IND_ADDR] = 0x120,
++ [IPROC_PCIE_CFG_IND_DATA] = 0x124,
++ [IPROC_PCIE_CFG_ADDR] = 0x1f8,
++ [IPROC_PCIE_CFG_DATA] = 0x1fc,
++ [IPROC_PCIE_INTX_EN] = 0x330,
++ [IPROC_PCIE_OARR_LO] = 0xd20,
++ [IPROC_PCIE_OARR_HI] = 0xd24,
++ [IPROC_PCIE_OMAP_LO] = 0xd40,
++ [IPROC_PCIE_OMAP_HI] = 0xd44,
++ [IPROC_PCIE_LINK_STATUS] = 0xf0c,
++};
++
++/* iProc PCIe PAXC v1 registers */
++static const u16 iproc_pcie_reg_paxc[] = {
++ [IPROC_PCIE_CLK_CTRL] = 0x000,
++ [IPROC_PCIE_CFG_IND_ADDR] = 0x1f0,
++ [IPROC_PCIE_CFG_IND_DATA] = 0x1f4,
++ [IPROC_PCIE_CFG_ADDR] = 0x1f8,
++ [IPROC_PCIE_CFG_DATA] = 0x1fc,
++ [IPROC_PCIE_INTX_EN] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_OARR_LO] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_OARR_HI] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_OMAP_LO] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_OMAP_HI] = IPROC_PCIE_REG_INVALID,
++ [IPROC_PCIE_LINK_STATUS] = IPROC_PCIE_REG_INVALID,
++};
+
+ static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
+ {
+@@ -91,6 +125,65 @@ static inline struct iproc_pcie *iproc_d
+ return pcie;
+ }
+
++static inline bool iproc_pcie_reg_is_invalid(u16 reg_offset)
++{
++ return !!(reg_offset == IPROC_PCIE_REG_INVALID);
++}
++
++static inline u16 iproc_pcie_reg_offset(struct iproc_pcie *pcie,
++ enum iproc_pcie_reg reg)
++{
++ return pcie->reg_offsets[reg];
++}
++
++static inline u32 iproc_pcie_read_reg(struct iproc_pcie *pcie,
++ enum iproc_pcie_reg reg)
++{
++ u16 offset = iproc_pcie_reg_offset(pcie, reg);
++
++ if (iproc_pcie_reg_is_invalid(offset))
++ return 0;
++
++ return readl(pcie->base + offset);
++}
++
++static inline void iproc_pcie_write_reg(struct iproc_pcie *pcie,
++ enum iproc_pcie_reg reg, u32 val)
++{
++ u16 offset = iproc_pcie_reg_offset(pcie, reg);
++
++ if (iproc_pcie_reg_is_invalid(offset))
++ return;
++
++ writel(val, pcie->base + offset);
++}
++
++static inline void iproc_pcie_ob_write(struct iproc_pcie *pcie,
++ enum iproc_pcie_reg reg,
++ unsigned window, u32 val)
++{
++ u16 offset = iproc_pcie_reg_offset(pcie, reg);
++
++ if (iproc_pcie_reg_is_invalid(offset))
++ return;
++
++ writel(val, pcie->base + offset + (window * 8));
++}
++
++static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
++ unsigned int slot,
++ unsigned int fn)
++{
++ if (slot > 0)
++ return false;
++
++ /* PAXC can only support limited number of functions */
++ if (pcie->type == IPROC_PCIE_PAXC && fn >= MAX_NUM_PAXC_PF)
++ return false;
++
++ return true;
++}
++
+ /**
+ * Note access to the configuration registers are protected at the higher layer
+ * by 'pci_lock' in drivers/pci/access.c
+@@ -104,28 +197,34 @@ static void __iomem *iproc_pcie_map_cfg_
+ unsigned fn = PCI_FUNC(devfn);
+ unsigned busno = bus->number;
+ u32 val;
++ u16 offset;
++
++ if (!iproc_pcie_device_is_valid(pcie, slot, fn))
++ return NULL;
+
+ /* root complex access */
+ if (busno == 0) {
+- if (slot >= 1)
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
++ where & CFG_IND_ADDR_MASK);
++ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
++ if (iproc_pcie_reg_is_invalid(offset))
+ return NULL;
+- writel(where & CFG_IND_ADDR_MASK,
+- pcie->base + CFG_IND_ADDR_OFFSET);
+- return (pcie->base + CFG_IND_DATA_OFFSET);
++ else
++ return (pcie->base + offset);
+ }
+
+- if (fn > 1)
+- return NULL;
+-
+ /* EP device access */
+ val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
+ (slot << CFG_ADDR_DEV_NUM_SHIFT) |
+ (fn << CFG_ADDR_FUNC_NUM_SHIFT) |
+ (where & CFG_ADDR_REG_NUM_MASK) |
+ (1 & CFG_ADDR_CFG_TYPE_MASK);
+- writel(val, pcie->base + CFG_ADDR_OFFSET);
+-
+- return (pcie->base + CFG_DATA_OFFSET);
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val);
++ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA);
++ if (iproc_pcie_reg_is_invalid(offset))
++ return NULL;
++ else
++ return (pcie->base + offset);
+ }
+
+ static struct pci_ops iproc_pcie_ops = {
+@@ -138,18 +237,29 @@ static void iproc_pcie_reset(struct ipro
+ {
+ u32 val;
+
++ if (pcie->type == IPROC_PCIE_PAXC) {
++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL);
++ val &= ~PAXC_RESET_MASK;
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
++ udelay(100);
++ val |= PAXC_RESET_MASK;
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
++ udelay(100);
++ return;
++ }
++
+ /*
+ * Select perst_b signal as reset source. Put the device into reset,
+ * and then bring it out of reset
+ */
+- val = readl(pcie->base + CLK_CONTROL_OFFSET);
++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL);
+ val &= ~EP_PERST_SOURCE_SELECT & ~EP_MODE_SURVIVE_PERST &
+ ~RC_PCIE_RST_OUTPUT;
+- writel(val, pcie->base + CLK_CONTROL_OFFSET);
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
+ udelay(250);
+
+ val |= RC_PCIE_RST_OUTPUT;
+- writel(val, pcie->base + CLK_CONTROL_OFFSET);
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
+ msleep(100);
+ }
+
+@@ -160,7 +270,14 @@ static int iproc_pcie_check_link(struct
+ u16 pos, link_status;
+ bool link_is_active = false;
+
+- val = readl(pcie->base + PCIE_LINK_STATUS_OFFSET);
++ /*
++ * PAXC connects to emulated endpoint devices directly and does not
++ * have a Serdes. Therefore skip the link detection logic here
++ */
++ if (pcie->type == IPROC_PCIE_PAXC)
++ return 0;
++
++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_LINK_STATUS);
+ if (!(val & PCIE_PHYLINKUP) || !(val & PCIE_DL_ACTIVE)) {
+ dev_err(pcie->dev, "PHY or data link is INACTIVE!\n");
+ return -ENODEV;
+@@ -221,7 +338,7 @@ static int iproc_pcie_check_link(struct
+
+ static void iproc_pcie_enable(struct iproc_pcie *pcie)
+ {
+- writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN);
++ iproc_pcie_write_reg(pcie, IPROC_PCIE_INTX_EN, SYS_RC_INTX_MASK);
+ }
+
+ /**
+@@ -272,11 +389,15 @@ static int iproc_pcie_setup_ob(struct ip
+ axi_addr -= ob->axi_offset;
+
+ for (i = 0; i < MAX_NUM_OB_WINDOWS; i++) {
+- writel(lower_32_bits(axi_addr) | OARR_VALID |
+- (ob->set_oarr_size ? 1 : 0), pcie->base + OARR_LO(i));
+- writel(upper_32_bits(axi_addr), pcie->base + OARR_HI(i));
+- writel(lower_32_bits(pci_addr), pcie->base + OMAP_LO(i));
+- writel(upper_32_bits(pci_addr), pcie->base + OMAP_HI(i));
++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OARR_LO, i,
++ lower_32_bits(axi_addr) | OARR_VALID |
++ (ob->set_oarr_size ? 1 : 0));
++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OARR_HI, i,
++ upper_32_bits(axi_addr));
++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OMAP_LO, i,
++ lower_32_bits(pci_addr));
++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OMAP_HI, i,
++ upper_32_bits(pci_addr));
+
+ size -= ob->window_size;
+ if (size == 0)
+@@ -340,6 +461,19 @@ int iproc_pcie_setup(struct iproc_pcie *
+ goto err_exit_phy;
+ }
+
++ switch (pcie->type) {
++ case IPROC_PCIE_PAXB:
++ pcie->reg_offsets = iproc_pcie_reg_paxb;
++ break;
++ case IPROC_PCIE_PAXC:
++ pcie->reg_offsets = iproc_pcie_reg_paxc;
++ break;
++ default:
++ dev_err(pcie->dev, "incompatible iProc PCIe interface\n");
++ ret = -EINVAL;
++ goto err_power_off_phy;
++ }
++
+ iproc_pcie_reset(pcie);
+
+ if (pcie->need_ob_cfg) {
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -15,6 +15,20 @@
+ #define _PCIE_IPROC_H
+
+ /**
++ * iProc PCIe interface type
++ *
++ * PAXB is the wrapper used in root complex that can be connected to an
++ * external endpoint device
++ *
++ * PAXC is the wrapper used in root complex dedicated for internal emulated
++ * endpoint devices
++ */
++enum iproc_pcie_type {
++ IPROC_PCIE_PAXB = 0,
++ IPROC_PCIE_PAXC,
++};
++
++/**
+ * iProc PCIe outbound mapping
+ * @set_oarr_size: indicates the OARR size bit needs to be set
+ * @axi_offset: offset from the AXI address to the internal address used by
+@@ -29,7 +43,10 @@ struct iproc_pcie_ob {
+
+ /**
+ * iProc PCIe device
++ *
+ * @dev: pointer to device data structure
++ * @type: iProc PCIe interface type
++ * @reg_offsets: register offsets
+ * @base: PCIe host controller I/O register base
+ * @sysdata: Per PCI controller data (ARM-specific)
+ * @root_bus: pointer to root bus
+@@ -41,6 +58,8 @@ struct iproc_pcie_ob {
+ */
+ struct iproc_pcie {
+ struct device *dev;
++ enum iproc_pcie_type type;
++ const u16 *reg_offsets;
+ void __iomem *base;
+ #ifdef CONFIG_ARM
+ struct pci_sys_data sysdata;
--- /dev/null
+From 96b40de5e36ec479dabb88500f1830a87818a809 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Mon, 16 Nov 2015 17:57:33 -0800
+Subject: [PATCH 152/154] PCI: iproc: Add iProc PCIe MSI device tree binding
+
+This patch updates the iProc PCIe device tree bindings with added
+binding information for MSI
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Anup Patel <anup.patel@broadcom.com>
+Reviewed-by: Vikram Prakash <vikramp@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ .../devicetree/bindings/pci/brcm,iproc-pcie.txt | 35 ++++++++++++++++++++++
+ 1 file changed, 35 insertions(+)
+
+--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
++++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
+@@ -35,6 +35,28 @@ Optional:
+ - brcm,pcie-ob-oarr-size: Some iProc SoCs need the OARR size bit to be set to
+ increase the outbound window size
+
++MSI support (optional):
++
++For older platforms without MSI integrated in the GIC, iProc PCIe core provides
++an event queue based MSI support. The iProc MSI uses host memories to store
++MSI posted writes in the event queues
++
++- msi-parent: Link to the device node of the MSI controller. On newer iProc
++platforms, the MSI controller may be gicv2m or gicv3-its. On older iProc
++platforms without MSI support in its interrupt controller, one may use the
++event queue based MSI support integrated within the iProc PCIe core
++
++When the iProc event queue based MSI is used, one needs to define the
++following properties in the MSI device node:
++- compatible: Must be "brcm,iproc-msi"
++- msi-controller: claims itself as an MSI controller
++- interrupt-parent: Link to its parent interrupt device
++- interrupts: List of interrupt IDs from its parent interrupt device
++
++Optional properties:
++- brcm,pcie-msi-inten: Needs to be present for some older iProc platforms that
++require the interrupt enable registers to be set explicitly to enable MSI
++
+ Example:
+ pcie0: pcie@18012000 {
+ compatible = "brcm,iproc-pcie";
+@@ -61,6 +83,19 @@ Example:
+ brcm,pcie-ob-oarr-size;
+ brcm,pcie-ob-axi-offset = <0x00000000>;
+ brcm,pcie-ob-window-size = <256>;
++
++ msi-parent = <&msi0>;
++
++ /* iProc event queue based MSI */
++ msi0: msi@18012000 {
++ compatible = "brcm,iproc-msi";
++ msi-controller;
++ interrupt-parent = <&gic>;
++ interrupts = <GIC_SPI 96 IRQ_TYPE_NONE>,
++ <GIC_SPI 97 IRQ_TYPE_NONE>,
++ <GIC_SPI 98 IRQ_TYPE_NONE>,
++ <GIC_SPI 99 IRQ_TYPE_NONE>,
++ };
+ };
+
+ pcie1: pcie@18013000 {
--- /dev/null
+From c81922174d61127ff5baad6059ae148794c72276 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Tue, 17 Nov 2015 13:14:37 -0800
+Subject: [PATCH 153/154] PCI: iproc: Add iProc PCIe MSI support
+
+This patch adds PCIe MSI support for both PAXB and PAXC interfaces on
+all iProc based platforms
+
+The iProc PCIe MSI support deploys an event queue based implementation.
+Each event queue is serviced by a GIC interrupt and can support up to 64
+MSI vectors. Host memory is allocated for the event queues, and each event
+queue consists of 64 word-sized entries. MSI data is written to the
+lower 16-bit of each entry, whereas the upper 16-bit of the entry is
+reserved for the controller for internal processing
+
+Each event queue is tracked by a head pointer and tail pointer. Head
+pointer indicates the next entry in the event queue to be processed by
+the driver and is updated by the driver after processing is done.
+The controller uses the tail pointer as the next MSI data insertion
+point. The controller ensures MSI data is flushed to host memory before
+updating the tail pointer and then triggering the interrupt
+
+MSI IRQ affinity is supported by evenly distributing the interrupts to
+each CPU core. MSI vector is moved from one GIC interrupt to another in
+order to steer to the target CPU
+
+Therefore, the actual number of supported MSI vectors is:
+
+M * 64 / N
+
+where M denotes the number of GIC interrupts (event queues), and N
+denotes the number of CPU cores
+
+This iProc event queue based MSI support should not be used with newer
+platforms with integrated MSI support in the GIC (e.g., giv2m or
+gicv3-its)
+
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Reviewed-by: Anup Patel <anup.patel@broadcom.com>
+Reviewed-by: Vikram Prakash <vikramp@broadcom.com>
+Reviewed-by: Scott Branden <sbranden@broadcom.com>
+---
+ drivers/pci/host/Kconfig | 9 +
+ drivers/pci/host/Makefile | 1 +
+ drivers/pci/host/pcie-iproc-bcma.c | 1 +
+ drivers/pci/host/pcie-iproc-msi.c | 675 +++++++++++++++++++++++++++++++++
+ drivers/pci/host/pcie-iproc-platform.c | 1 +
+ drivers/pci/host/pcie-iproc.c | 26 ++
+ drivers/pci/host/pcie-iproc.h | 23 +-
+ 7 files changed, 734 insertions(+), 2 deletions(-)
+ create mode 100644 drivers/pci/host/pcie-iproc-msi.c
+
+--- a/drivers/pci/host/Kconfig
++++ b/drivers/pci/host/Kconfig
+@@ -124,6 +124,15 @@ config PCIE_IPROC
+ iProc family of SoCs. An appropriate bus interface driver also needs
+ to be enabled
+
++config PCIE_IPROC_MSI
++ bool "Broadcom iProc PCIe MSI support"
++ depends on ARCH_BCM_IPROC && PCI_MSI
++ select PCI_MSI_IRQ_DOMAIN
++ default ARCH_BCM_IPROC
++ help
++ Say Y here if you want to enable MSI support for Broadcom's iProc
++ PCIe controller
++
+ config PCIE_IPROC_PLATFORM
+ tristate "Broadcom iProc PCIe platform bus driver"
+ depends on ARCH_BCM_IPROC || (ARM && COMPILE_TEST)
+--- a/drivers/pci/host/Makefile
++++ b/drivers/pci/host/Makefile
+@@ -15,5 +15,6 @@ obj-$(CONFIG_PCI_XGENE_MSI) += pci-xgene
+ 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_MSI) += pcie-iproc-msi.o
+ obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o
+ obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
+--- a/drivers/pci/host/pcie-iproc-bcma.c
++++ b/drivers/pci/host/pcie-iproc-bcma.c
+@@ -55,6 +55,7 @@ static int iproc_pcie_bcma_probe(struct
+ bcma_set_drvdata(bdev, pcie);
+
+ pcie->base = bdev->io_addr;
++ pcie->base_addr = bdev->addr;
+
+ res_mem.start = bdev->addr_s[0];
+ res_mem.end = bdev->addr_s[0] + SZ_128M - 1;
+--- /dev/null
++++ b/drivers/pci/host/pcie-iproc-msi.c
+@@ -0,0 +1,675 @@
++/*
++ * Copyright (C) 2015 Broadcom Corporation
++ *
++ * 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/interrupt.h>
++#include <linux/irqchip/chained_irq.h>
++#include <linux/irqdomain.h>
++#include <linux/msi.h>
++#include <linux/of_irq.h>
++#include <linux/of_pci.h>
++#include <linux/pci.h>
++
++#include "pcie-iproc.h"
++
++#define IPROC_MSI_INTR_EN_SHIFT 11
++#define IPROC_MSI_INTR_EN BIT(IPROC_MSI_INTR_EN_SHIFT)
++#define IPROC_MSI_INT_N_EVENT_SHIFT 1
++#define IPROC_MSI_INT_N_EVENT BIT(IPROC_MSI_INT_N_EVENT_SHIFT)
++#define IPROC_MSI_EQ_EN_SHIFT 0
++#define IPROC_MSI_EQ_EN BIT(IPROC_MSI_EQ_EN_SHIFT)
++
++#define IPROC_MSI_EQ_MASK 0x3f
++
++/* max number of GIC interrupts */
++#define NR_HW_IRQS 6
++
++/* number of entries in each event queue */
++#define EQ_LEN 64
++
++/* size of each event queue memory region */
++#define EQ_MEM_REGION_SIZE SZ_4K
++
++/* size of each MSI address region */
++#define MSI_MEM_REGION_SIZE SZ_4K
++
++enum iproc_msi_reg {
++ IPROC_MSI_EQ_PAGE = 0,
++ IPROC_MSI_EQ_PAGE_UPPER,
++ IPROC_MSI_PAGE,
++ IPROC_MSI_PAGE_UPPER,
++ IPROC_MSI_CTRL,
++ IPROC_MSI_EQ_HEAD,
++ IPROC_MSI_EQ_TAIL,
++ IPROC_MSI_INTS_EN,
++ IPROC_MSI_REG_SIZE,
++};
++
++struct iproc_msi;
++
++/**
++ * iProc MSI group
++ *
++ * One MSI group is allocated per GIC interrupt, serviced by one iProc MSI
++ * event queue
++ *
++ * @msi: pointer to iProc MSI data
++ * @gic_irq: GIC interrupt
++ * @eq: Event queue number
++ */
++struct iproc_msi_grp {
++ struct iproc_msi *msi;
++ int gic_irq;
++ unsigned int eq;
++};
++
++/**
++ * iProc event queue based MSI
++ *
++ * Only meant to be used on platforms without MSI support integrated into the
++ * GIC
++ *
++ * @pcie: pointer to iProc PCIe data
++ * @reg_offsets: MSI register offsets
++ * @grps: MSI groups
++ * @nr_irqs: number of total interrupts connected to GIC
++ * @nr_cpus: number of toal CPUs
++ * @has_inten_reg: indicates the MSI interrupt enable register needs to be
++ * set explicitly (required for some legacy platforms)
++ * @bitmap: MSI vector bitmap
++ * @bitmap_lock: lock to protect access to the MSI bitmap
++ * @nr_msi_vecs: total number of MSI vectors
++ * @inner_domain: inner IRQ domain
++ * @msi_domain: MSI IRQ domain
++ * @nr_eq_region: required number of 4K aligned memory region for MSI event
++ * queues
++ * @nr_msi_region: required number of 4K aligned address region for MSI posted
++ * writes
++ * @eq_cpu: pointer to allocated memory region for MSI event queues
++ * @eq_dma: DMA address of MSI event queues
++ * @msi_addr: MSI address
++ */
++struct iproc_msi {
++ struct iproc_pcie *pcie;
++ const u16 (*reg_offsets)[IPROC_MSI_REG_SIZE];
++ struct iproc_msi_grp *grps;
++ int nr_irqs;
++ int nr_cpus;
++ bool has_inten_reg;
++ unsigned long *bitmap;
++ struct mutex bitmap_lock;
++ unsigned int nr_msi_vecs;
++ struct irq_domain *inner_domain;
++ struct irq_domain *msi_domain;
++ unsigned int nr_eq_region;
++ unsigned int nr_msi_region;
++ void *eq_cpu;
++ dma_addr_t eq_dma;
++ phys_addr_t msi_addr;
++};
++
++static const u16 iproc_msi_reg_paxb[NR_HW_IRQS][IPROC_MSI_REG_SIZE] = {
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x210, 0x250, 0x254, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x214, 0x258, 0x25c, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x218, 0x260, 0x264, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x21c, 0x268, 0x26c, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x220, 0x270, 0x274, 0x208 },
++ { 0x200, 0x2c0, 0x204, 0x2c4, 0x224, 0x278, 0x27c, 0x208 },
++};
++
++static const u16 iproc_msi_reg_paxc[NR_HW_IRQS][IPROC_MSI_REG_SIZE] = {
++ { 0xc00, 0xc04, 0xc08, 0xc0c, 0xc40, 0xc50, 0xc60 },
++ { 0xc10, 0xc14, 0xc18, 0xc1c, 0xc44, 0xc54, 0xc64 },
++ { 0xc20, 0xc24, 0xc28, 0xc2c, 0xc48, 0xc58, 0xc68 },
++ { 0xc30, 0xc34, 0xc38, 0xc3c, 0xc4c, 0xc5c, 0xc6c },
++};
++
++static inline u32 iproc_msi_read_reg(struct iproc_msi *msi,
++ enum iproc_msi_reg reg,
++ unsigned int eq)
++{
++ struct iproc_pcie *pcie = msi->pcie;
++
++ return readl_relaxed(pcie->base + msi->reg_offsets[eq][reg]);
++}
++
++static inline void iproc_msi_write_reg(struct iproc_msi *msi,
++ enum iproc_msi_reg reg,
++ int eq, u32 val)
++{
++ struct iproc_pcie *pcie = msi->pcie;
++
++ writel_relaxed(val, pcie->base + msi->reg_offsets[eq][reg]);
++}
++
++static inline u32 hwirq_to_group(struct iproc_msi *msi, unsigned long hwirq)
++{
++ return (hwirq % msi->nr_irqs);
++}
++
++static inline unsigned int iproc_msi_addr_offset(struct iproc_msi *msi,
++ unsigned long hwirq)
++{
++ if (msi->nr_msi_region > 1)
++ return hwirq_to_group(msi, hwirq) * MSI_MEM_REGION_SIZE;
++ else
++ return hwirq_to_group(msi, hwirq) * sizeof(u32);
++}
++
++static inline unsigned int iproc_msi_eq_offset(struct iproc_msi *msi, u32 eq)
++{
++ if (msi->nr_eq_region > 1)
++ return eq * EQ_MEM_REGION_SIZE;
++ else
++ return eq * EQ_LEN * sizeof(u32);
++}
++
++static struct irq_chip iproc_msi_irq_chip = {
++ .name = "iProc-MSI",
++};
++
++static struct msi_domain_info iproc_msi_domain_info = {
++ .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
++ MSI_FLAG_PCI_MSIX,
++ .chip = &iproc_msi_irq_chip,
++};
++
++/*
++ * In iProc PCIe core, each MSI group is serviced by a GIC interrupt and a
++ * dedicated event queue. Each MSI group can support up to 64 MSI vectors
++ *
++ * The number of MSI groups varies between different iProc SoCs. The total
++ * number of CPU cores also varies. To support MSI IRQ affinity, we
++ * distribute GIC interrupts across all available CPUs. MSI vector is moved
++ * from one GIC interrupt to another to steer to the target CPU
++ *
++ * Assuming:
++ * - the number of MSI groups is M
++ * - the number of CPU cores is N
++ * - M is always a multiple of N
++ *
++ * Total number of raw MSI vectors = M * 64
++ * Total number of supported MSI vectors = (M * 64) / N
++ */
++static inline int hwirq_to_cpu(struct iproc_msi *msi, unsigned long hwirq)
++{
++ return (hwirq % msi->nr_cpus);
++}
++
++static inline unsigned long hwirq_to_canonical_hwirq(struct iproc_msi *msi,
++ unsigned long hwirq)
++{
++ return (hwirq - hwirq_to_cpu(msi, hwirq));
++}
++
++static int iproc_msi_irq_set_affinity(struct irq_data *data,
++ const struct cpumask *mask, bool force)
++{
++ struct iproc_msi *msi = irq_data_get_irq_chip_data(data);
++ int target_cpu = cpumask_first(mask);
++ int curr_cpu;
++
++ curr_cpu = hwirq_to_cpu(msi, data->hwirq);
++ if (curr_cpu == target_cpu)
++ return IRQ_SET_MASK_OK_DONE;
++
++ /* steer MSI to the target CPU */
++ data->hwirq = hwirq_to_canonical_hwirq(msi, data->hwirq) + target_cpu;
++
++ return IRQ_SET_MASK_OK;
++}
++
++static void iproc_msi_irq_compose_msi_msg(struct irq_data *data,
++ struct msi_msg *msg)
++{
++ struct iproc_msi *msi = irq_data_get_irq_chip_data(data);
++ dma_addr_t addr;
++
++ addr = msi->msi_addr + iproc_msi_addr_offset(msi, data->hwirq);
++ msg->address_lo = lower_32_bits(addr);
++ msg->address_hi = upper_32_bits(addr);
++ msg->data = data->hwirq;
++}
++
++static struct irq_chip iproc_msi_bottom_irq_chip = {
++ .name = "MSI",
++ .irq_set_affinity = iproc_msi_irq_set_affinity,
++ .irq_compose_msi_msg = iproc_msi_irq_compose_msi_msg,
++};
++
++static int iproc_msi_irq_domain_alloc(struct irq_domain *domain,
++ unsigned int virq, unsigned int nr_irqs,
++ void *args)
++{
++ struct iproc_msi *msi = domain->host_data;
++ int hwirq;
++
++ mutex_lock(&msi->bitmap_lock);
++
++ /* allocate 'nr_cpus' number of MSI vectors each time */
++ hwirq = bitmap_find_next_zero_area(msi->bitmap, msi->nr_msi_vecs, 0,
++ msi->nr_cpus, 0);
++ if (hwirq < msi->nr_msi_vecs) {
++ bitmap_set(msi->bitmap, hwirq, msi->nr_cpus);
++ } else {
++ mutex_unlock(&msi->bitmap_lock);
++ return -ENOSPC;
++ }
++
++ mutex_unlock(&msi->bitmap_lock);
++
++ irq_domain_set_info(domain, virq, hwirq, &iproc_msi_bottom_irq_chip,
++ domain->host_data, handle_simple_irq, NULL, NULL);
++
++ return 0;
++}
++
++static void iproc_msi_irq_domain_free(struct irq_domain *domain,
++ unsigned int virq, unsigned int nr_irqs)
++{
++ struct irq_data *data = irq_domain_get_irq_data(domain, virq);
++ struct iproc_msi *msi = irq_data_get_irq_chip_data(data);
++ unsigned int hwirq;
++
++ mutex_lock(&msi->bitmap_lock);
++
++ hwirq = hwirq_to_canonical_hwirq(msi, data->hwirq);
++ bitmap_clear(msi->bitmap, hwirq, msi->nr_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 = iproc_msi_irq_domain_alloc,
++ .free = iproc_msi_irq_domain_free,
++};
++
++static inline u32 decode_msi_hwirq(struct iproc_msi *msi, u32 eq, u32 head)
++{
++ u32 *msg, hwirq;
++ unsigned int offs;
++
++ offs = iproc_msi_eq_offset(msi, eq) + head * sizeof(u32);
++ msg = (u32 *)(msi->eq_cpu + offs);
++ hwirq = *msg & IPROC_MSI_EQ_MASK;
++
++ /*
++ * Since we have multiple hwirq mapped to a single MSI vector,
++ * now we need to derive the hwirq at CPU0. It can then be used to
++ * mapped back to virq
++ */
++ return hwirq_to_canonical_hwirq(msi, hwirq);
++}
++
++static void iproc_msi_handler(struct irq_desc *desc)
++{
++ struct irq_chip *chip = irq_desc_get_chip(desc);
++ struct iproc_msi_grp *grp;
++ struct iproc_msi *msi;
++ struct iproc_pcie *pcie;
++ u32 eq, head, tail, nr_events;
++ unsigned long hwirq;
++ int virq;
++
++ chained_irq_enter(chip, desc);
++
++ grp = irq_desc_get_handler_data(desc);
++ msi = grp->msi;
++ pcie = msi->pcie;
++ eq = grp->eq;
++
++ /*
++ * iProc MSI event queue is tracked by head and tail pointers. Head
++ * pointer indicates the next entry (MSI data) to be consumed by SW in
++ * the queue and needs to be updated by SW. iProc MSI core uses the
++ * tail pointer as the next data insertion point
++ *
++ * Entries between head and tail pointers contain valid MSI data. MSI
++ * data is guaranteed to be in the event queue memory before the tail
++ * pointer is updated by the iProc MSI core
++ */
++ head = iproc_msi_read_reg(msi, IPROC_MSI_EQ_HEAD,
++ eq) & IPROC_MSI_EQ_MASK;
++ do {
++ tail = iproc_msi_read_reg(msi, IPROC_MSI_EQ_TAIL,
++ eq) & IPROC_MSI_EQ_MASK;
++
++ /*
++ * Figure out total number of events (MSI data) to be
++ * processed
++ */
++ nr_events = (tail < head) ?
++ (EQ_LEN - (head - tail)) : (tail - head);
++ if (!nr_events)
++ break;
++
++ /* process all outstanding events */
++ while (nr_events--) {
++ hwirq = decode_msi_hwirq(msi, eq, head);
++ virq = irq_find_mapping(msi->inner_domain, hwirq);
++ generic_handle_irq(virq);
++
++ head++;
++ head %= EQ_LEN;
++ }
++
++ /*
++ * Now all outstanding events have been processed. Update the
++ * head pointer
++ */
++ iproc_msi_write_reg(msi, IPROC_MSI_EQ_HEAD, eq, head);
++
++ /*
++ * Now go read the tail pointer again to see if there are new
++ * oustanding events that came in during the above window
++ */
++ } while (true);
++
++ chained_irq_exit(chip, desc);
++}
++
++static void iproc_msi_enable(struct iproc_msi *msi)
++{
++ int i, eq;
++ u32 val;
++
++ /* program memory region for each event queue */
++ for (i = 0; i < msi->nr_eq_region; i++) {
++ dma_addr_t addr = msi->eq_dma + (i * EQ_MEM_REGION_SIZE);
++
++ iproc_msi_write_reg(msi, IPROC_MSI_EQ_PAGE, i,
++ lower_32_bits(addr));
++ iproc_msi_write_reg(msi, IPROC_MSI_EQ_PAGE_UPPER, i,
++ upper_32_bits(addr));
++ }
++
++ /* program address region for MSI posted writes */
++ for (i = 0; i < msi->nr_msi_region; i++) {
++ phys_addr_t addr = msi->msi_addr + (i * MSI_MEM_REGION_SIZE);
++
++ iproc_msi_write_reg(msi, IPROC_MSI_PAGE, i,
++ lower_32_bits(addr));
++ iproc_msi_write_reg(msi, IPROC_MSI_PAGE_UPPER, i,
++ upper_32_bits(addr));
++ }
++
++ for (eq = 0; eq < msi->nr_irqs; eq++) {
++ /* enable MSI event queue */
++ val = IPROC_MSI_INTR_EN | IPROC_MSI_INT_N_EVENT |
++ IPROC_MSI_EQ_EN;
++ iproc_msi_write_reg(msi, IPROC_MSI_CTRL, eq, val);
++
++ /*
++ * Some legacy platforms require the MSI interrupt enable
++ * register to be set explicitly
++ */
++ if (msi->has_inten_reg) {
++ val = iproc_msi_read_reg(msi, IPROC_MSI_INTS_EN, eq);
++ val |= BIT(eq);
++ iproc_msi_write_reg(msi, IPROC_MSI_INTS_EN, eq, val);
++ }
++ }
++}
++
++static void iproc_msi_disable(struct iproc_msi *msi)
++{
++ u32 eq, val;
++
++ for (eq = 0; eq < msi->nr_irqs; eq++) {
++ if (msi->has_inten_reg) {
++ val = iproc_msi_read_reg(msi, IPROC_MSI_INTS_EN, eq);
++ val &= ~BIT(eq);
++ iproc_msi_write_reg(msi, IPROC_MSI_INTS_EN, eq, val);
++ }
++
++ val = iproc_msi_read_reg(msi, IPROC_MSI_CTRL, eq);
++ val &= ~(IPROC_MSI_INTR_EN | IPROC_MSI_INT_N_EVENT |
++ IPROC_MSI_EQ_EN);
++ iproc_msi_write_reg(msi, IPROC_MSI_CTRL, eq, val);
++ }
++}
++
++static int iproc_msi_alloc_domains(struct device_node *node,
++ struct iproc_msi *msi)
++{
++ msi->inner_domain = irq_domain_add_linear(NULL, msi->nr_msi_vecs,
++ &msi_domain_ops, msi);
++ if (!msi->inner_domain)
++ return -ENOMEM;
++
++ msi->msi_domain = pci_msi_create_irq_domain(of_node_to_fwnode(node),
++ &iproc_msi_domain_info,
++ msi->inner_domain);
++ if (!msi->msi_domain) {
++ irq_domain_remove(msi->inner_domain);
++ return -ENOMEM;
++ }
++
++ return 0;
++}
++
++static void iproc_msi_free_domains(struct iproc_msi *msi)
++{
++ if (msi->msi_domain)
++ irq_domain_remove(msi->msi_domain);
++
++ if (msi->inner_domain)
++ irq_domain_remove(msi->inner_domain);
++}
++
++static void iproc_msi_irq_free(struct iproc_msi *msi, unsigned int cpu)
++{
++ int i;
++
++ for (i = cpu; i < msi->nr_irqs; i += msi->nr_cpus) {
++ irq_set_chained_handler_and_data(msi->grps[i].gic_irq,
++ NULL, NULL);
++ }
++}
++
++static int iproc_msi_irq_setup(struct iproc_msi *msi, unsigned int cpu)
++{
++ int i, ret;
++ cpumask_var_t mask;
++ struct iproc_pcie *pcie = msi->pcie;
++
++ for (i = cpu; i < msi->nr_irqs; i += msi->nr_cpus) {
++ irq_set_chained_handler_and_data(msi->grps[i].gic_irq,
++ iproc_msi_handler,
++ &msi->grps[i]);
++ /* dedicate GIC interrupt to each CPU core */
++ if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
++ cpumask_clear(mask);
++ cpumask_set_cpu(cpu, mask);
++ ret = irq_set_affinity(msi->grps[i].gic_irq, mask);
++ if (ret)
++ dev_err(pcie->dev,
++ "failed to set affinity for IRQ%d\n",
++ msi->grps[i].gic_irq);
++ free_cpumask_var(mask);
++ } else {
++ dev_err(pcie->dev, "failed to alloc CPU mask\n");
++ ret = -EINVAL;
++ }
++
++ if (ret) {
++ /* free all configured/unconfigured irqs */
++ iproc_msi_irq_free(msi, cpu);
++ return ret;
++ }
++ }
++
++ return 0;
++}
++
++int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node)
++{
++ struct iproc_msi *msi;
++ int i, ret;
++ unsigned int cpu;
++
++ if (!of_device_is_compatible(node, "brcm,iproc-msi"))
++ return -ENODEV;
++
++ if (!of_find_property(node, "msi-controller", NULL))
++ return -ENODEV;
++
++ if (pcie->msi)
++ return -EBUSY;
++
++ msi = devm_kzalloc(pcie->dev, sizeof(*msi), GFP_KERNEL);
++ if (!msi)
++ return -ENOMEM;
++
++ msi->pcie = pcie;
++ pcie->msi = msi;
++ msi->msi_addr = pcie->base_addr;
++ mutex_init(&msi->bitmap_lock);
++ msi->nr_cpus = num_possible_cpus();
++
++ msi->nr_irqs = of_irq_count(node);
++ if (!msi->nr_irqs) {
++ dev_err(pcie->dev, "found no MSI GIC interrupt\n");
++ return -ENODEV;
++ }
++
++ if (msi->nr_irqs > NR_HW_IRQS) {
++ dev_warn(pcie->dev, "too many MSI GIC interrupts defined %d\n",
++ msi->nr_irqs);
++ msi->nr_irqs = NR_HW_IRQS;
++ }
++
++ if (msi->nr_irqs < msi->nr_cpus) {
++ dev_err(pcie->dev,
++ "not enough GIC interrupts for MSI affinity\n");
++ return -EINVAL;
++ }
++
++ if (msi->nr_irqs % msi->nr_cpus != 0) {
++ msi->nr_irqs -= msi->nr_irqs % msi->nr_cpus;
++ dev_warn(pcie->dev, "Reducing number of interrupts to %d\n",
++ msi->nr_irqs);
++ }
++
++ switch (pcie->type) {
++ case IPROC_PCIE_PAXB:
++ msi->reg_offsets = iproc_msi_reg_paxb;
++ msi->nr_eq_region = 1;
++ msi->nr_msi_region = 1;
++ break;
++ case IPROC_PCIE_PAXC:
++ msi->reg_offsets = iproc_msi_reg_paxc;
++ msi->nr_eq_region = msi->nr_irqs;
++ msi->nr_msi_region = msi->nr_irqs;
++ break;
++ default:
++ dev_err(pcie->dev, "incompatible iProc PCIe interface\n");
++ return -EINVAL;
++ }
++
++ if (of_find_property(node, "brcm,pcie-msi-inten", NULL))
++ msi->has_inten_reg = true;
++
++ msi->nr_msi_vecs = msi->nr_irqs * EQ_LEN;
++ msi->bitmap = devm_kcalloc(pcie->dev, BITS_TO_LONGS(msi->nr_msi_vecs),
++ sizeof(*msi->bitmap), GFP_KERNEL);
++ if (!msi->bitmap)
++ return -ENOMEM;
++
++ msi->grps = devm_kcalloc(pcie->dev, msi->nr_irqs, sizeof(*msi->grps),
++ GFP_KERNEL);
++ if (!msi->grps)
++ return -ENOMEM;
++
++ for (i = 0; i < msi->nr_irqs; i++) {
++ unsigned int irq = irq_of_parse_and_map(node, i);
++
++ if (!irq) {
++ dev_err(pcie->dev, "unable to parse/map interrupt\n");
++ ret = -ENODEV;
++ goto free_irqs;
++ }
++ msi->grps[i].gic_irq = irq;
++ msi->grps[i].msi = msi;
++ msi->grps[i].eq = i;
++ }
++
++ /* reserve memory for event queue and make sure memories are zeroed */
++ msi->eq_cpu = dma_zalloc_coherent(pcie->dev,
++ msi->nr_eq_region * EQ_MEM_REGION_SIZE,
++ &msi->eq_dma, GFP_KERNEL);
++ if (!msi->eq_cpu) {
++ ret = -ENOMEM;
++ goto free_irqs;
++ }
++
++ ret = iproc_msi_alloc_domains(node, msi);
++ if (ret) {
++ dev_err(pcie->dev, "failed to create MSI domains\n");
++ goto free_eq_dma;
++ }
++
++ for_each_online_cpu(cpu) {
++ ret = iproc_msi_irq_setup(msi, cpu);
++ if (ret)
++ goto free_msi_irq;
++ }
++
++ iproc_msi_enable(msi);
++
++ return 0;
++
++free_msi_irq:
++ for_each_online_cpu(cpu)
++ iproc_msi_irq_free(msi, cpu);
++ iproc_msi_free_domains(msi);
++
++free_eq_dma:
++ dma_free_coherent(pcie->dev, msi->nr_eq_region * EQ_MEM_REGION_SIZE,
++ msi->eq_cpu, msi->eq_dma);
++
++free_irqs:
++ for (i = 0; i < msi->nr_irqs; i++) {
++ if (msi->grps[i].gic_irq)
++ irq_dispose_mapping(msi->grps[i].gic_irq);
++ }
++ pcie->msi = NULL;
++ return ret;
++}
++EXPORT_SYMBOL(iproc_msi_init);
++
++void iproc_msi_exit(struct iproc_pcie *pcie)
++{
++ struct iproc_msi *msi = pcie->msi;
++ unsigned int i, cpu;
++
++ if (!msi)
++ return;
++
++ iproc_msi_disable(msi);
++
++ for_each_online_cpu(cpu)
++ iproc_msi_irq_free(msi, cpu);
++
++ iproc_msi_free_domains(msi);
++
++ dma_free_coherent(pcie->dev, msi->nr_eq_region * EQ_MEM_REGION_SIZE,
++ msi->eq_cpu, msi->eq_dma);
++
++ for (i = 0; i < msi->nr_irqs; i++) {
++ if (msi->grps[i].gic_irq)
++ irq_dispose_mapping(msi->grps[i].gic_irq);
++ }
++}
++EXPORT_SYMBOL(iproc_msi_exit);
+--- a/drivers/pci/host/pcie-iproc-platform.c
++++ b/drivers/pci/host/pcie-iproc-platform.c
+@@ -71,6 +71,7 @@ static int iproc_pcie_pltfm_probe(struct
+ dev_err(pcie->dev, "unable to map controller registers\n");
+ return -ENOMEM;
+ }
++ pcie->base_addr = reg.start;
+
+ if (of_property_read_bool(np, "brcm,pcie-ob")) {
+ u32 val;
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -440,6 +440,26 @@ static int iproc_pcie_map_ranges(struct
+ return 0;
+ }
+
++static int iproc_pcie_msi_enable(struct iproc_pcie *pcie)
++{
++ struct device_node *msi_node;
++
++ msi_node = of_parse_phandle(pcie->dev->of_node, "msi-parent", 0);
++ if (!msi_node)
++ return -ENODEV;
++
++ /*
++ * If another MSI controller is being used, the call below should fail
++ * but that is okay
++ */
++ return iproc_msi_init(pcie, msi_node);
++}
++
++static void iproc_pcie_msi_disable(struct iproc_pcie *pcie)
++{
++ iproc_msi_exit(pcie);
++}
++
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
+ {
+ int ret;
+@@ -507,6 +527,10 @@ int iproc_pcie_setup(struct iproc_pcie *
+
+ iproc_pcie_enable(pcie);
+
++ if (IS_ENABLED(CONFIG_PCI_MSI))
++ if (iproc_pcie_msi_enable(pcie))
++ dev_info(pcie->dev, "not using iProc MSI\n");
++
+ pci_scan_child_bus(bus);
+ pci_assign_unassigned_bus_resources(bus);
+ pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
+@@ -531,6 +555,8 @@ int iproc_pcie_remove(struct iproc_pcie
+ pci_stop_root_bus(pcie->root_bus);
+ pci_remove_root_bus(pcie->root_bus);
+
++ iproc_pcie_msi_disable(pcie);
++
+ phy_power_off(pcie->phy);
+ phy_exit(pcie->phy);
+
+--- a/drivers/pci/host/pcie-iproc.h
++++ b/drivers/pci/host/pcie-iproc.h
+@@ -41,6 +41,8 @@ struct iproc_pcie_ob {
+ resource_size_t window_size;
+ };
+
++struct iproc_msi;
++
+ /**
+ * iProc PCIe device
+ *
+@@ -48,19 +50,21 @@ struct iproc_pcie_ob {
+ * @type: iProc PCIe interface type
+ * @reg_offsets: register offsets
+ * @base: PCIe host controller I/O register base
++ * @base_addr: PCIe host controller register base physical address
+ * @sysdata: Per PCI controller data (ARM-specific)
+ * @root_bus: pointer to root bus
+ * @phy: optional PHY device that controls the Serdes
+- * @irqs: interrupt IDs
+ * @map_irq: function callback to map interrupts
+- * @need_ob_cfg: indidates SW needs to configure the outbound mapping window
++ * @need_ob_cfg: indicates SW needs to configure the outbound mapping window
+ * @ob: outbound mapping parameters
++ * @msi: MSI data
+ */
+ struct iproc_pcie {
+ struct device *dev;
+ enum iproc_pcie_type type;
+ const u16 *reg_offsets;
+ void __iomem *base;
++ phys_addr_t base_addr;
+ #ifdef CONFIG_ARM
+ struct pci_sys_data sysdata;
+ #endif
+@@ -69,9 +73,24 @@ struct iproc_pcie {
+ int (*map_irq)(const struct pci_dev *, u8, u8);
+ bool need_ob_cfg;
+ struct iproc_pcie_ob ob;
++ struct iproc_msi *msi;
+ };
+
+ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
+ int iproc_pcie_remove(struct iproc_pcie *pcie);
+
++#ifdef CONFIG_PCI_MSI
++int iproc_msi_init(struct iproc_pcie *pcie, struct device_node *node);
++void iproc_msi_exit(struct iproc_pcie *pcie);
++#else
++static inline int iproc_msi_init(struct iproc_pcie *pcie,
++ struct device_node *node)
++{
++ return -ENODEV;
++}
++static void iproc_msi_exit(struct iproc_pcie *pcie)
++{
++}
++#endif
++
+ #endif /* _PCIE_IPROC_H */
projects / openwrt / staging / hauke.git / commitdiff