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Message-Id: <20190218094643.2692-1-xiaowei.bao@nxp.com>
Date: Mon, 18 Feb 2019 17:46:38 +0800
From: Xiaowei Bao <xiaowei.bao@....com>
To: bhelgaas@...gle.com, Zhiqiang.Hou@....com, robh+dt@...nel.org,
mark.rutland@....com, shawnguo@...nel.org, leoyang.li@....com,
kishon@...com, lorenzo.pieralisi@....com,
gregkh@...uxfoundation.org, l.subrahmanya@...iveil.co.in,
arnd@...db.de, Minghuan.Lian@....com, linux-pci@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Xiaowei Bao <xiaowei.bao@....com>
Subject: [PATCH 1/6] PCI: mobiveil: Add the EP mode support
Add the EP mode support for Mobiveil base on endpoint framework.
Signed-off-by: Xiaowei Bao <xiaowei.bao@....com>
---
depends on: http://patchwork.ozlabs.org/project/linux-pci/list/?series=88754
drivers/pci/controller/mobiveil/Kconfig | 5 +
drivers/pci/controller/mobiveil/Makefile | 1 +
drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c | 527 ++++++++++++++++++++
drivers/pci/controller/mobiveil/pcie-mobiveil.c | 100 ++++-
drivers/pci/controller/mobiveil/pcie-mobiveil.h | 64 +++
5 files changed, 691 insertions(+), 6 deletions(-)
create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c
diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controller/mobiveil/Kconfig
index 3ddb7d6..c037db6 100644
--- a/drivers/pci/controller/mobiveil/Kconfig
+++ b/drivers/pci/controller/mobiveil/Kconfig
@@ -11,6 +11,11 @@ config PCIE_MOBIVEIL_HOST
depends on PCI_MSI_IRQ_DOMAIN
select PCIE_MOBIVEIL
+config PCIE_MOBIVEIL_EP
+ bool
+ depends on PCI_ENDPOINT
+ select PCIE_MOBIVEIL
+
config PCIE_MOBIVEIL_PLAT
bool "Mobiveil AXI PCIe controller"
depends on ARCH_ZYNQMP || COMPILE_TEST
diff --git a/drivers/pci/controller/mobiveil/Makefile b/drivers/pci/controller/mobiveil/Makefile
index ff66774..4f520b7 100644
--- a/drivers/pci/controller/mobiveil/Makefile
+++ b/drivers/pci/controller/mobiveil/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
obj-$(CONFIG_PCIE_MOBIVEIL_HOST) += pcie-mobiveil-host.o
+obj-$(CONFIG_PCIE_MOBIVEIL_EP) += pcie-mobiveil-ep.o
obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) += pcie-mobiveil-plat.o
obj-$(CONFIG_PCI_LAYERSCAPE_GEN4) += pci-layerscape-gen4.o
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c
new file mode 100644
index 0000000..16ca7fb
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c
@@ -0,0 +1,527 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * Mobiveil PCIe Endpoint controller driver
+ *
+ * Copyright (C) 2018 NXP Semiconductor.
+ * Author: Xiaowei Bao <xiaowei.bao@....com>
+ */
+
+#include <linux/of.h>
+#include <linux/pci-epc.h>
+#include <linux/pci-epf.h>
+#include <linux/platform_device.h>
+#include "pcie-mobiveil.h"
+
+void mobiveil_pcie_ep_linkup(struct mobiveil_pcie_ep *ep)
+{
+ struct pci_epc *epc = ep->epc;
+
+ pci_epc_linkup(epc);
+}
+
+static void __mobiveil_pcie_ep_reset_bar(struct mobiveil_pcie *pcie,
+ enum pci_barno bar)
+{
+ csr_writel(pcie, bar, GPEX_BAR_SELECT);
+ csr_writel(pcie, 0, GPEX_BAR_SIZE_LDW);
+ csr_writel(pcie, 0, GPEX_BAR_SIZE_UDW);
+}
+
+void mobiveil_pcie_ep_reset_bar(struct mobiveil_pcie *pcie,
+ enum pci_barno bar)
+{
+ __mobiveil_pcie_ep_reset_bar(pcie, bar);
+}
+
+static u8 __mobiveil_pcie_ep_find_next_cap(struct mobiveil_pcie *pcie,
+ u8 cap_ptr, u8 cap)
+{
+ u8 cap_id, next_cap_ptr;
+ u16 reg;
+
+ reg = csr_readw(pcie, cap_ptr);
+ next_cap_ptr = (reg & 0xff00) >> 8;
+ cap_id = (reg & 0x00ff);
+
+ if (cap_id == cap)
+ return cap_ptr;
+
+ if (!next_cap_ptr || cap_id > PCI_CAP_ID_MAX)
+ return 0;
+
+ return __mobiveil_pcie_ep_find_next_cap(pcie, next_cap_ptr, cap);
+}
+
+static u8 mobiveil_pcie_ep_find_capability(struct mobiveil_pcie *pcie,
+ u8 cap)
+{
+ u8 next_cap_ptr;
+ u16 reg;
+
+ reg = csr_readw(pcie, PCI_CAPABILITY_LIST);
+ next_cap_ptr = (reg & 0x00ff);
+
+ if (!next_cap_ptr)
+ return 0;
+
+ return __mobiveil_pcie_ep_find_next_cap(pcie, next_cap_ptr, cap);
+}
+
+static int mobiveil_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
+ struct pci_epf_header *hdr)
+{
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+
+ csr_writew(pcie, hdr->vendorid, PCI_VENDOR_ID);
+ csr_writew(pcie, hdr->deviceid, PCI_DEVICE_ID);
+ csr_writeb(pcie, hdr->revid, PCI_REVISION_ID);
+ csr_writeb(pcie, hdr->progif_code, PCI_CLASS_PROG);
+ csr_writew(pcie, hdr->subclass_code | hdr->baseclass_code << 8,
+ PCI_CLASS_DEVICE);
+ csr_writeb(pcie, hdr->cache_line_size, PCI_CACHE_LINE_SIZE);
+ csr_writew(pcie, hdr->subsys_vendor_id, PCI_SUBSYSTEM_VENDOR_ID);
+ csr_writew(pcie, hdr->subsys_id, PCI_SUBSYSTEM_ID);
+ csr_writeb(pcie, hdr->interrupt_pin, PCI_INTERRUPT_PIN);
+
+ return 0;
+}
+
+static int mobiveil_pcie_ep_inbound_atu(struct mobiveil_pcie_ep *ep,
+ u8 func_no, enum pci_barno bar,
+ dma_addr_t cpu_addr)
+{
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+
+ program_ib_windows_ep(pcie, func_no, bar, cpu_addr);
+
+ return 0;
+}
+
+static int mobiveil_pcie_ep_outbound_atu(struct mobiveil_pcie_ep *ep,
+ phys_addr_t phys_addr,
+ u64 pci_addr, u8 func_no,
+ size_t size)
+{
+ int ret;
+ u32 free_win;
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+
+ free_win = find_first_zero_bit(ep->ob_window_map, ep->num_ob_windows);
+ if (free_win >= ep->num_ob_windows) {
+ dev_err(&pcie->pdev->dev, "No free outbound window\n");
+ return -EINVAL;
+ }
+
+ ret = program_ob_windows_ep(pcie, free_win, MEM_WINDOW_TYPE,
+ phys_addr, pci_addr, func_no, size);
+ if (ret < 0) {
+ dev_err(&pcie->pdev->dev, "Failed to program IB window\n");
+ return ret;
+ }
+
+ set_bit(free_win, ep->ob_window_map);
+ ep->outbound_addr[free_win] = phys_addr;
+
+ return 0;
+}
+
+static void mobiveil_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
+ struct pci_epf_bar *epf_bar)
+{
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ enum pci_barno bar = epf_bar->barno;
+
+ if (bar < ep->bar_num) {
+ __mobiveil_pcie_ep_reset_bar(pcie,
+ func_no * ep->bar_num + bar);
+
+ mobiveil_pcie_disable_ib_win_ep(pcie, func_no, bar);
+ }
+}
+
+static int mobiveil_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
+ struct pci_epf_bar *epf_bar)
+{
+ int ret;
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ enum pci_barno bar = epf_bar->barno;
+ size_t size = epf_bar->size;
+
+ if (bar < ep->bar_num) {
+ ret = mobiveil_pcie_ep_inbound_atu(ep, func_no, bar,
+ epf_bar->phys_addr);
+ if (ret)
+ return ret;
+
+ csr_writel(pcie, func_no * ep->bar_num + bar,
+ GPEX_BAR_SELECT);
+ csr_writel(pcie, lower_32_bits(~(size - 1)),
+ GPEX_BAR_SIZE_LDW);
+ csr_writel(pcie, upper_32_bits(~(size - 1)),
+ GPEX_BAR_SIZE_UDW);
+ }
+
+ return 0;
+}
+
+static int mobiveil_pcie_find_index(struct mobiveil_pcie_ep *ep,
+ phys_addr_t addr,
+ u32 *atu_index)
+{
+ u32 index;
+
+ for (index = 0; index < ep->num_ob_windows; index++) {
+ if (ep->outbound_addr[index] != addr)
+ continue;
+ *atu_index = index;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static void mobiveil_pcie_ep_unmap_addr(struct pci_epc *epc, u8 func_no,
+ phys_addr_t addr)
+{
+ int ret;
+ u32 atu_index;
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+
+ ret = mobiveil_pcie_find_index(ep, addr, &atu_index);
+ if (ret < 0)
+ return;
+
+ mobiveil_pcie_disable_ob_win(pcie, atu_index);
+ clear_bit(atu_index, ep->ob_window_map);
+}
+
+static int mobiveil_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no,
+ phys_addr_t addr,
+ u64 pci_addr, size_t size)
+{
+ int ret;
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+
+ ret = mobiveil_pcie_ep_outbound_atu(ep, addr, pci_addr, func_no, size);
+ if (ret) {
+ dev_err(&pcie->pdev->dev, "Failed to enable address\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int mobiveil_pcie_ep_get_msi(struct pci_epc *epc, u8 func_no)
+{
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ u32 val, reg;
+
+ if (!ep->msi_cap)
+ return -EINVAL;
+
+ reg = ep->msi_cap + PCI_MSI_FLAGS;
+ val = csr_readw(pcie, reg);
+ if (!(val & PCI_MSI_FLAGS_ENABLE))
+ return -EINVAL;
+
+ val = (val & PCI_MSI_FLAGS_QSIZE) >> 4;
+
+ return val;
+}
+
+static int mobiveil_pcie_ep_set_msi(struct pci_epc *epc,
+ u8 func_no, u8 interrupts)
+{
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ u32 val, reg;
+
+ if (!ep->msi_cap)
+ return -EINVAL;
+
+ reg = ep->msi_cap + PCI_MSI_FLAGS;
+ val = csr_readw(pcie, reg);
+ val &= ~PCI_MSI_FLAGS_QMASK;
+ val |= (interrupts << 1) & PCI_MSI_FLAGS_QMASK;
+ csr_writew(pcie, val, reg);
+
+ return 0;
+}
+
+static int mobiveil_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
+{
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ u32 val, reg;
+
+ if (!ep->msix_cap)
+ return -EINVAL;
+
+ reg = ep->msix_cap + PCI_MSIX_FLAGS;
+ val = csr_readw(pcie, reg);
+ if (!(val & PCI_MSIX_FLAGS_ENABLE))
+ return -EINVAL;
+
+ val &= PCI_MSIX_FLAGS_QSIZE;
+
+ return val;
+}
+
+static int mobiveil_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no,
+ u16 interrupts)
+{
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ u32 val, reg;
+
+ if (!ep->msix_cap)
+ return -EINVAL;
+
+ reg = ep->msix_cap + PCI_MSIX_FLAGS;
+ val = csr_readw(pcie, reg);
+ val &= ~PCI_MSIX_FLAGS_QSIZE;
+ val |= interrupts;
+ csr_writew(pcie, val, reg);
+
+ return 0;
+}
+
+static int mobiveil_pcie_ep_raise_irq(struct pci_epc *epc, u8 func_no,
+ enum pci_epc_irq_type type,
+ u16 interrupt_num)
+{
+ struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
+
+ if (!ep->ops->raise_irq)
+ return -EINVAL;
+
+ return ep->ops->raise_irq(ep, func_no, type, interrupt_num);
+}
+
+static const struct pci_epc_ops epc_ops = {
+ .write_header = mobiveil_pcie_ep_write_header,
+ .set_bar = mobiveil_pcie_ep_set_bar,
+ .clear_bar = mobiveil_pcie_ep_clear_bar,
+ .map_addr = mobiveil_pcie_ep_map_addr,
+ .unmap_addr = mobiveil_pcie_ep_unmap_addr,
+ .set_msi = mobiveil_pcie_ep_set_msi,
+ .get_msi = mobiveil_pcie_ep_get_msi,
+ .set_msix = mobiveil_pcie_ep_set_msix,
+ .get_msix = mobiveil_pcie_ep_get_msix,
+ .raise_irq = mobiveil_pcie_ep_raise_irq,
+};
+
+int mobiveil_pcie_ep_raise_legacy_irq(struct mobiveil_pcie_ep *ep, u8 func_no)
+{
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+
+ dev_err(&pcie->pdev->dev, "EP cannot trigger legacy IRQs\n");
+
+ return -EINVAL;
+}
+
+int mobiveil_pcie_ep_raise_msi_irq(struct mobiveil_pcie_ep *ep, u8 func_no,
+ u8 interrupt_num)
+{
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ struct pci_epc *epc = ep->epc;
+ u16 msg_ctrl, msg_data;
+ u32 msg_addr_lower, msg_addr_upper, reg;
+ u64 msg_addr;
+ u32 func_num;
+ bool has_upper;
+ int ret;
+
+ if (!ep->msi_cap)
+ return -EINVAL;
+
+ /*
+ * In order ot get the PF's MSI capability register value from config
+ * space we need to set the PF number to the PAB_CTRL register.
+ */
+ func_num = csr_readl(pcie, PAB_CTRL);
+ func_num &= ~(FUNC_SEL_MASK << FUNC_SEL_SHIFT);
+ func_num |= (func_no & FUNC_SEL_MASK) << FUNC_SEL_SHIFT;
+ csr_writel(pcie, func_num, PAB_CTRL);
+
+ reg = ep->msi_cap + PCI_MSI_FLAGS;
+ msg_ctrl = csr_readw(pcie, reg);
+ has_upper = !!(msg_ctrl & PCI_MSI_FLAGS_64BIT);
+ reg = ep->msi_cap + PCI_MSI_ADDRESS_LO;
+ msg_addr_lower = csr_readl(pcie, reg);
+ if (has_upper) {
+ reg = ep->msi_cap + PCI_MSI_ADDRESS_HI;
+ msg_addr_upper = csr_readl(pcie, reg);
+ reg = ep->msi_cap + PCI_MSI_DATA_64;
+ msg_data = csr_readw(pcie, reg);
+ } else {
+ msg_addr_upper = 0;
+ reg = ep->msi_cap + PCI_MSI_DATA_32;
+ msg_data = csr_readw(pcie, reg);
+ }
+ msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
+
+ /*
+ * clear the FUNC_SEL_SHIFT bits when access other registers except
+ * config space register.
+ */
+ func_num = csr_readl(pcie, PAB_CTRL);
+ func_num &= ~(FUNC_SEL_MASK << FUNC_SEL_SHIFT);
+ csr_writel(pcie, func_num, PAB_CTRL);
+
+ ret = mobiveil_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys,
+ msg_addr, epc->mem->page_size);
+ if (ret)
+ return ret;
+
+ writel(msg_data | (interrupt_num - 1), ep->msi_mem);
+
+ mobiveil_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
+
+ return 0;
+}
+
+int mobiveil_pcie_ep_raise_msix_irq(struct mobiveil_pcie_ep *ep, u8 func_no,
+ u16 interrupt_num)
+{
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ struct pci_epc *epc = ep->epc;
+ u32 msg_addr_upper, msg_addr_lower;
+ u32 msg_data;
+ u64 msg_addr;
+ u32 func_num;
+ int ret;
+
+ /*
+ * In order ot get the PF's MSI capability register value from config
+ * space we need to set the PF number to the PAB_CTRL register.
+ */
+ func_num = csr_readl(pcie, PAB_CTRL);
+ func_num &= ~(FUNC_SEL_MASK << FUNC_SEL_SHIFT);
+ func_num |= (func_no & FUNC_SEL_MASK) << FUNC_SEL_SHIFT;
+ csr_writel(pcie, func_num, PAB_CTRL);
+
+ msg_addr_lower = csr_readl(pcie, PAB_MSIX_TABLE_PBA_ACCESS +
+ PCI_MSIX_ENTRY_LOWER_ADDR +
+ (interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE);
+ msg_addr_upper = csr_readl(pcie, PAB_MSIX_TABLE_PBA_ACCESS +
+ PCI_MSIX_ENTRY_UPPER_ADDR +
+ (interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE);
+ msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
+ msg_data = csr_readl(pcie, PAB_MSIX_TABLE_PBA_ACCESS +
+ PCI_MSIX_ENTRY_DATA +
+ (interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE);
+
+ /*
+ * clear the FUNC_SEL_SHIFT bits when access other registers except
+ * config space registers.
+ */
+ func_num = csr_readl(pcie, PAB_CTRL);
+ func_num &= ~(FUNC_SEL_MASK << FUNC_SEL_SHIFT);
+ csr_writel(pcie, func_num, PAB_CTRL);
+
+ ret = mobiveil_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys,
+ msg_addr, epc->mem->page_size);
+ if (ret)
+ return ret;
+
+ writel(msg_data, ep->msi_mem);
+
+ mobiveil_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
+
+ return 0;
+}
+
+void mobiveil_pcie_ep_exit(struct mobiveil_pcie_ep *ep)
+{
+ struct pci_epc *epc = ep->epc;
+
+ pci_epc_mem_free_addr(epc, ep->msi_mem_phys, ep->msi_mem,
+ epc->mem->page_size);
+
+ pci_epc_mem_exit(epc);
+}
+
+int mobiveil_pcie_ep_init(struct mobiveil_pcie_ep *ep)
+{
+ int ret;
+ void *addr;
+ struct pci_epc *epc;
+ struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
+ struct device *dev = &pcie->pdev->dev;
+ struct device_node *np = dev->of_node;
+
+ if (!pcie->csr_axi_slave_base) {
+ dev_err(dev, "csr_base is not populated\n");
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32(np, "num-ob-windows", &ep->num_ob_windows);
+ if (ret < 0) {
+ dev_err(dev, "Unable to read *num-ob-windows* property\n");
+ return ret;
+ }
+
+ if (ep->num_ob_windows > MAX_IATU_OUT) {
+ dev_err(dev, "Invalid *num-ob-windows*\n");
+ return -EINVAL;
+ }
+ ep->ob_window_map = devm_kcalloc(dev,
+ BITS_TO_LONGS(ep->num_ob_windows),
+ sizeof(long),
+ GFP_KERNEL);
+ if (!ep->ob_window_map)
+ return -ENOMEM;
+
+ addr = devm_kcalloc(dev, ep->num_ob_windows, sizeof(phys_addr_t),
+ GFP_KERNEL);
+ if (!addr)
+ return -ENOMEM;
+ ep->outbound_addr = addr;
+
+ mobiveil_pcie_enable_bridge_pio(pcie);
+ mobiveil_pcie_enable_engine_apio(pcie);
+ mobiveil_pcie_enable_engine_ppio(pcie);
+ mobiveil_pcie_enable_msi_ep(pcie);
+
+ epc = devm_pci_epc_create(dev, &epc_ops);
+ if (IS_ERR(epc)) {
+ dev_err(dev, "Failed to create epc device\n");
+ return PTR_ERR(epc);
+ }
+
+ ep->epc = epc;
+ epc_set_drvdata(epc, ep);
+
+ ep->msi_cap = mobiveil_pcie_ep_find_capability(pcie, PCI_CAP_ID_MSI);
+
+ ep->msix_cap = mobiveil_pcie_ep_find_capability(pcie,
+ PCI_CAP_ID_MSIX);
+
+ if (ep->ops->ep_init)
+ ep->ops->ep_init(ep);
+
+ epc->max_functions = ep->pf_num;
+
+ ret = __pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
+ ep->page_size);
+ if (ret < 0) {
+ dev_err(dev, "Failed to initialize address space\n");
+ return ret;
+ }
+
+ ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
+ epc->mem->page_size);
+ if (!ep->msi_mem) {
+ dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
index 49d471b..d1fdfed 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
@@ -210,6 +210,57 @@ void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
pcie->ob_wins_configured++;
}
+int program_ob_windows_ep(struct mobiveil_pcie *pcie, int win_num, int type,
+ u64 phys, u64 bus_addr, u8 func, u64 size)
+{
+ u32 val;
+ u32 size_h, size_l;
+
+ if (size & (size - 1))
+ size = 1 << (1 + ilog2(size));
+
+ size_h = upper_32_bits(~(size - 1));
+ size_l = lower_32_bits(~(size - 1));
+
+ val = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
+ val &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT |
+ WIN_SIZE_MASK << WIN_SIZE_SHIFT);
+ val |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
+ (size_l & (WIN_SIZE_MASK << WIN_SIZE_SHIFT));
+ csr_writel(pcie, val, PAB_AXI_AMAP_CTRL(win_num));
+
+ csr_writel(pcie, func, PAB_AXI_AMAP_PCI_HDR_PARAM(win_num));
+ csr_writel(pcie, lower_32_bits(phys), PAB_AXI_AMAP_AXI_WIN(win_num));
+ csr_writel(pcie, upper_32_bits(phys),
+ PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
+ csr_writel(pcie, lower_32_bits(bus_addr),
+ PAB_AXI_AMAP_PEX_WIN_L(win_num));
+ csr_writel(pcie, upper_32_bits(bus_addr),
+ PAB_AXI_AMAP_PEX_WIN_H(win_num));
+ csr_writel(pcie, size_h, PAB_EXT_AXI_AMAP_SIZE(win_num));
+
+ return 0;
+}
+
+void program_ib_windows_ep(struct mobiveil_pcie *pcie, u8 func_no,
+ int bar, u64 phys)
+{
+ csr_writel(pcie, upper_32_bits(phys),
+ PAB_EXT_PEX_BAR_AMAP(func_no, bar));
+ csr_writel(pcie, lower_32_bits(phys) | PEX_BAR_AMAP_EN,
+ PAB_PEX_BAR_AMAP(func_no, bar));
+}
+
+void mobiveil_pcie_disable_ib_win_ep(struct mobiveil_pcie *pcie,
+ u8 func_no, u8 bar)
+{
+ u32 val;
+
+ val = csr_readl(pcie, PAB_PEX_BAR_AMAP(func_no, bar));
+ val &= ~(1 << 0);
+ csr_writel(pcie, val, PAB_PEX_BAR_AMAP(func_no, bar));
+}
+
int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
{
int retries;
@@ -227,20 +278,57 @@ int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
return -ETIMEDOUT;
}
-void mobiveil_pcie_disable_ib_win(struct mobiveil_pcie *pci, int win_num)
+void mobiveil_pcie_disable_ib_win(struct mobiveil_pcie *pcie, int win_num)
{
u32 val;
- val = csr_readl(pci, PAB_PEX_AMAP_CTRL(win_num));
+ val = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
val &= ~(1 << AMAP_CTRL_EN_SHIFT);
- csr_writel(pci, val, PAB_PEX_AMAP_CTRL(win_num));
+ csr_writel(pcie, val, PAB_PEX_AMAP_CTRL(win_num));
}
-void mobiveil_pcie_disable_ob_win(struct mobiveil_pcie *pci, int win_num)
+void mobiveil_pcie_disable_ob_win(struct mobiveil_pcie *pcie, int win_num)
{
u32 val;
- val = csr_readl(pci, PAB_AXI_AMAP_CTRL(win_num));
+ val = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
val &= ~(1 << WIN_ENABLE_SHIFT);
- csr_writel(pci, val, PAB_AXI_AMAP_CTRL(win_num));
+ csr_writel(pcie, val, PAB_AXI_AMAP_CTRL(win_num));
+}
+
+void mobiveil_pcie_enable_bridge_pio(struct mobiveil_pcie *pcie)
+{
+ u32 val;
+
+ val = csr_readl(pcie, PAB_CTRL);
+ val |= 1 << AMBA_PIO_ENABLE_SHIFT;
+ val |= 1 << PEX_PIO_ENABLE_SHIFT;
+ csr_writel(pcie, val, PAB_CTRL);
+}
+
+void mobiveil_pcie_enable_engine_apio(struct mobiveil_pcie *pcie)
+{
+ u32 val;
+
+ val = csr_readl(pcie, PAB_AXI_PIO_CTRL);
+ val |= APIO_EN_MASK;
+ csr_writel(pcie, val, PAB_AXI_PIO_CTRL);
+}
+
+void mobiveil_pcie_enable_engine_ppio(struct mobiveil_pcie *pcie)
+{
+ u32 val;
+
+ val = csr_readl(pcie, PAB_PEX_PIO_CTRL);
+ val |= 1 << PIO_ENABLE_SHIFT;
+ csr_writel(pcie, val, PAB_PEX_PIO_CTRL);
+}
+
+void mobiveil_pcie_enable_msi_ep(struct mobiveil_pcie *pcie)
+{
+ u32 val;
+
+ val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
+ val |= 1 << 0;
+ csr_writel(pcie, val, PAB_INTP_AMBA_MISC_ENB);
}
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
index f0e2e4a..275c68f 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -15,6 +15,10 @@
#include <linux/msi.h>
#include "../../pci.h"
+#include <linux/pci-epc.h>
+#include <linux/pci-epf.h>
+
+#define MAX_IATU_OUT 256
/* register offsets and bit positions */
/*
@@ -40,6 +44,9 @@
#define PAGE_SEL_MASK 0x3f
#define PAGE_LO_MASK 0x3ff
#define PAGE_SEL_OFFSET_SHIFT 10
+#define FUNC_SEL_SHIFT 19
+#define FUNC_SEL_MASK 0x1ff
+#define MSI_SW_CTRL_EN (1 << 29)
#define PAB_ACTIVITY_STAT 0x81c
@@ -100,6 +107,19 @@
#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win)
#define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win)
+/* PPIO WINs EP mode */
+#define PAB_PEX_BAR_AMAP(func, bar) (0x1ba0 + 0x20 * func + 4 * bar)
+#define PAB_EXT_PEX_BAR_AMAP(func, bar) (0x84a0 + 0x20 * func + 4 * bar)
+#define PEX_BAR_AMAP_EN (1 << 0)
+
+#define PAB_AXI_AMAP_PCI_HDR_PARAM(idx) (0x5ba0 + 0x04 * idx)
+#define PAB_MSIX_TABLE_PBA_ACCESS 0xD000
+
+#define GPEX_BAR_ENABLE 0x4D4
+#define GPEX_BAR_SIZE_LDW 0x4D8
+#define GPEX_BAR_SIZE_UDW 0x4DC
+#define GPEX_BAR_SELECT 0x4E0
+
/* starting offset of INTX bits in status register */
#define PAB_INTX_START 5
@@ -137,6 +157,7 @@
((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
struct mobiveil_pcie;
+struct mobiveil_pcie_ep;
struct mobiveil_msi { /* MSI information */
struct mutex lock; /* protect bitmap variable */
@@ -169,6 +190,29 @@ struct mobiveil_pab_ops {
int (*host_init)(struct mobiveil_pcie *pcie);
};
+struct mobiveil_pcie_ep_ops {
+ void (*ep_init)(struct mobiveil_pcie_ep *ep);
+ int (*raise_irq)(struct mobiveil_pcie_ep *ep, u8 func_no,
+ enum pci_epc_irq_type type, u16 interrupt_num);
+};
+
+struct mobiveil_pcie_ep {
+ struct pci_epc *epc;
+ struct mobiveil_pcie_ep_ops *ops;
+ phys_addr_t phys_base;
+ size_t addr_size;
+ size_t page_size;
+ phys_addr_t *outbound_addr;
+ unsigned long *ob_window_map;
+ u32 num_ob_windows;
+ void __iomem *msi_mem;
+ phys_addr_t msi_mem_phys;
+ u8 msi_cap; /* MSI capability offset */
+ u8 msix_cap; /* MSI-X capability offset */
+ u8 bar_num;
+ u32 pf_num;
+};
+
struct mobiveil_pcie {
struct platform_device *pdev;
struct list_head *resources;
@@ -181,7 +225,10 @@ struct mobiveil_pcie {
u32 ib_wins_configured; /* configured inbound windows */
const struct mobiveil_pab_ops *ops;
struct root_port rp;
+ struct mobiveil_pcie_ep ep;
};
+#define to_mobiveil_pcie_from_ep(endpoint) \
+ container_of((endpoint), struct mobiveil_pcie, ep)
int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit);
@@ -226,4 +273,21 @@ static inline void csr_writeb(struct mobiveil_pcie *pcie, u32 val, u32 off)
csr_write(pcie, val, off, 0x1);
}
+void program_ib_windows_ep(struct mobiveil_pcie *pcie, u8 func_no,
+ int bar, u64 phys);
+int program_ob_windows_ep(struct mobiveil_pcie *pcie, int win_num, int type,
+ u64 phys, u64 bus_addr, u8 func, u64 size);
+void mobiveil_pcie_disable_ib_win_ep(struct mobiveil_pcie *pci,
+ u8 func_no, u8 bar);
+int mobiveil_pcie_ep_init(struct mobiveil_pcie_ep *ep);
+int mobiveil_pcie_ep_raise_legacy_irq(struct mobiveil_pcie_ep *ep, u8 func_no);
+int mobiveil_pcie_ep_raise_msi_irq(struct mobiveil_pcie_ep *ep, u8 func_no,
+ u8 interrupt_num);
+int mobiveil_pcie_ep_raise_msix_irq(struct mobiveil_pcie_ep *ep, u8 func_no,
+ u16 interrupt_num);
+void mobiveil_pcie_ep_reset_bar(struct mobiveil_pcie *pci, enum pci_barno bar);
+void mobiveil_pcie_enable_bridge_pio(struct mobiveil_pcie *pci);
+void mobiveil_pcie_enable_engine_apio(struct mobiveil_pcie *pci);
+void mobiveil_pcie_enable_engine_ppio(struct mobiveil_pcie *pci);
+void mobiveil_pcie_enable_msi_ep(struct mobiveil_pcie *pci);
#endif /* _PCIE_MOBIVEIL_H */
--
1.7.1
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