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-rw-r--r--hw/pci-host/Makefile.objs2
-rw-r--r--hw/pci-host/designware.c754
2 files changed, 756 insertions, 0 deletions
diff --git a/hw/pci-host/Makefile.objs b/hw/pci-host/Makefile.objs
index 4b69f737b5..6d6597c065 100644
--- a/hw/pci-host/Makefile.objs
+++ b/hw/pci-host/Makefile.objs
@@ -17,3 +17,5 @@ common-obj-$(CONFIG_PCI_PIIX) += piix.o
common-obj-$(CONFIG_PCI_Q35) += q35.o
common-obj-$(CONFIG_PCI_GENERIC) += gpex.o
common-obj-$(CONFIG_PCI_XILINX) += xilinx-pcie.o
+
+common-obj-$(CONFIG_PCI_DESIGNWARE) += designware.o
diff --git a/hw/pci-host/designware.c b/hw/pci-host/designware.c
new file mode 100644
index 0000000000..29ea313798
--- /dev/null
+++ b/hw/pci-host/designware.c
@@ -0,0 +1,754 @@
+/*
+ * Copyright (c) 2018, Impinj, Inc.
+ *
+ * Designware PCIe IP block emulation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/pci/msi.h"
+#include "hw/pci/pci_bridge.h"
+#include "hw/pci/pci_host.h"
+#include "hw/pci/pcie_port.h"
+#include "hw/pci-host/designware.h"
+
+#define DESIGNWARE_PCIE_PORT_LINK_CONTROL 0x710
+#define DESIGNWARE_PCIE_PHY_DEBUG_R1 0x72C
+#define DESIGNWARE_PCIE_PHY_DEBUG_R1_XMLH_LINK_UP BIT(4)
+#define DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
+#define DESIGNWARE_PCIE_PORT_LOGIC_SPEED_CHANGE BIT(17)
+#define DESIGNWARE_PCIE_MSI_ADDR_LO 0x820
+#define DESIGNWARE_PCIE_MSI_ADDR_HI 0x824
+#define DESIGNWARE_PCIE_MSI_INTR0_ENABLE 0x828
+#define DESIGNWARE_PCIE_MSI_INTR0_MASK 0x82C
+#define DESIGNWARE_PCIE_MSI_INTR0_STATUS 0x830
+#define DESIGNWARE_PCIE_ATU_VIEWPORT 0x900
+#define DESIGNWARE_PCIE_ATU_REGION_INBOUND BIT(31)
+#define DESIGNWARE_PCIE_ATU_CR1 0x904
+#define DESIGNWARE_PCIE_ATU_TYPE_MEM (0x0 << 0)
+#define DESIGNWARE_PCIE_ATU_CR2 0x908
+#define DESIGNWARE_PCIE_ATU_ENABLE BIT(31)
+#define DESIGNWARE_PCIE_ATU_LOWER_BASE 0x90C
+#define DESIGNWARE_PCIE_ATU_UPPER_BASE 0x910
+#define DESIGNWARE_PCIE_ATU_LIMIT 0x914
+#define DESIGNWARE_PCIE_ATU_LOWER_TARGET 0x918
+#define DESIGNWARE_PCIE_ATU_BUS(x) (((x) >> 24) & 0xff)
+#define DESIGNWARE_PCIE_ATU_DEVFN(x) (((x) >> 16) & 0xff)
+#define DESIGNWARE_PCIE_ATU_UPPER_TARGET 0x91C
+
+static DesignwarePCIEHost *
+designware_pcie_root_to_host(DesignwarePCIERoot *root)
+{
+ BusState *bus = qdev_get_parent_bus(DEVICE(root));
+ return DESIGNWARE_PCIE_HOST(bus->parent);
+}
+
+static void designware_pcie_root_msi_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned len)
+{
+ DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(opaque);
+ DesignwarePCIEHost *host = designware_pcie_root_to_host(root);
+
+ root->msi.intr[0].status |= BIT(val) & root->msi.intr[0].enable;
+
+ if (root->msi.intr[0].status & ~root->msi.intr[0].mask) {
+ qemu_set_irq(host->pci.irqs[0], 1);
+ }
+}
+
+static const MemoryRegionOps designware_pci_host_msi_ops = {
+ .write = designware_pcie_root_msi_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+};
+
+static void designware_pcie_root_update_msi_mapping(DesignwarePCIERoot *root)
+
+{
+ MemoryRegion *mem = &root->msi.iomem;
+ const uint64_t base = root->msi.base;
+ const bool enable = root->msi.intr[0].enable;
+
+ memory_region_set_address(mem, base);
+ memory_region_set_enabled(mem, enable);
+}
+
+static DesignwarePCIEViewport *
+designware_pcie_root_get_current_viewport(DesignwarePCIERoot *root)
+{
+ const unsigned int idx = root->atu_viewport & 0xF;
+ const unsigned int dir =
+ !!(root->atu_viewport & DESIGNWARE_PCIE_ATU_REGION_INBOUND);
+ return &root->viewports[dir][idx];
+}
+
+static uint32_t
+designware_pcie_root_config_read(PCIDevice *d, uint32_t address, int len)
+{
+ DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(d);
+ DesignwarePCIEViewport *viewport =
+ designware_pcie_root_get_current_viewport(root);
+
+ uint32_t val;
+
+ switch (address) {
+ case DESIGNWARE_PCIE_PORT_LINK_CONTROL:
+ /*
+ * Linux guest uses this register only to configure number of
+ * PCIE lane (which in our case is irrelevant) and doesn't
+ * really care about the value it reads from this register
+ */
+ val = 0xDEADBEEF;
+ break;
+
+ case DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL:
+ /*
+ * To make sure that any code in guest waiting for speed
+ * change does not time out we always report
+ * PORT_LOGIC_SPEED_CHANGE as set
+ */
+ val = DESIGNWARE_PCIE_PORT_LOGIC_SPEED_CHANGE;
+ break;
+
+ case DESIGNWARE_PCIE_MSI_ADDR_LO:
+ val = root->msi.base;
+ break;
+
+ case DESIGNWARE_PCIE_MSI_ADDR_HI:
+ val = root->msi.base >> 32;
+ break;
+
+ case DESIGNWARE_PCIE_MSI_INTR0_ENABLE:
+ val = root->msi.intr[0].enable;
+ break;
+
+ case DESIGNWARE_PCIE_MSI_INTR0_MASK:
+ val = root->msi.intr[0].mask;
+ break;
+
+ case DESIGNWARE_PCIE_MSI_INTR0_STATUS:
+ val = root->msi.intr[0].status;
+ break;
+
+ case DESIGNWARE_PCIE_PHY_DEBUG_R1:
+ val = DESIGNWARE_PCIE_PHY_DEBUG_R1_XMLH_LINK_UP;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_VIEWPORT:
+ val = root->atu_viewport;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_LOWER_BASE:
+ val = viewport->base;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_UPPER_BASE:
+ val = viewport->base >> 32;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_LOWER_TARGET:
+ val = viewport->target;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_UPPER_TARGET:
+ val = viewport->target >> 32;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_LIMIT:
+ val = viewport->limit;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_CR1:
+ case DESIGNWARE_PCIE_ATU_CR2: /* FALLTHROUGH */
+ val = viewport->cr[(address - DESIGNWARE_PCIE_ATU_CR1) /
+ sizeof(uint32_t)];
+ break;
+
+ default:
+ val = pci_default_read_config(d, address, len);
+ break;
+ }
+
+ return val;
+}
+
+static uint64_t designware_pcie_root_data_access(void *opaque, hwaddr addr,
+ uint64_t *val, unsigned len)
+{
+ DesignwarePCIEViewport *viewport = opaque;
+ DesignwarePCIERoot *root = viewport->root;
+
+ const uint8_t busnum = DESIGNWARE_PCIE_ATU_BUS(viewport->target);
+ const uint8_t devfn = DESIGNWARE_PCIE_ATU_DEVFN(viewport->target);
+ PCIBus *pcibus = pci_get_bus(PCI_DEVICE(root));
+ PCIDevice *pcidev = pci_find_device(pcibus, busnum, devfn);
+
+ if (pcidev) {
+ addr &= pci_config_size(pcidev) - 1;
+
+ if (val) {
+ pci_host_config_write_common(pcidev, addr,
+ pci_config_size(pcidev),
+ *val, len);
+ } else {
+ return pci_host_config_read_common(pcidev, addr,
+ pci_config_size(pcidev),
+ len);
+ }
+ }
+
+ return UINT64_MAX;
+}
+
+static uint64_t designware_pcie_root_data_read(void *opaque, hwaddr addr,
+ unsigned len)
+{
+ return designware_pcie_root_data_access(opaque, addr, NULL, len);
+}
+
+static void designware_pcie_root_data_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned len)
+{
+ designware_pcie_root_data_access(opaque, addr, &val, len);
+}
+
+static const MemoryRegionOps designware_pci_host_conf_ops = {
+ .read = designware_pcie_root_data_read,
+ .write = designware_pcie_root_data_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ },
+};
+
+static void designware_pcie_update_viewport(DesignwarePCIERoot *root,
+ DesignwarePCIEViewport *viewport)
+{
+ const uint64_t target = viewport->target;
+ const uint64_t base = viewport->base;
+ const uint64_t size = (uint64_t)viewport->limit - base + 1;
+ const bool enabled = viewport->cr[1] & DESIGNWARE_PCIE_ATU_ENABLE;
+
+ MemoryRegion *current, *other;
+
+ if (viewport->cr[0] == DESIGNWARE_PCIE_ATU_TYPE_MEM) {
+ current = &viewport->mem;
+ other = &viewport->cfg;
+ memory_region_set_alias_offset(current, target);
+ } else {
+ current = &viewport->cfg;
+ other = &viewport->mem;
+ }
+
+ /*
+ * An outbound viewport can be reconfigure from being MEM to CFG,
+ * to account for that we disable the "other" memory region that
+ * becomes unused due to that fact.
+ */
+ memory_region_set_enabled(other, false);
+ if (enabled) {
+ memory_region_set_size(current, size);
+ memory_region_set_address(current, base);
+ }
+ memory_region_set_enabled(current, enabled);
+}
+
+static void designware_pcie_root_config_write(PCIDevice *d, uint32_t address,
+ uint32_t val, int len)
+{
+ DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(d);
+ DesignwarePCIEHost *host = designware_pcie_root_to_host(root);
+ DesignwarePCIEViewport *viewport =
+ designware_pcie_root_get_current_viewport(root);
+
+ switch (address) {
+ case DESIGNWARE_PCIE_PORT_LINK_CONTROL:
+ case DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL:
+ case DESIGNWARE_PCIE_PHY_DEBUG_R1:
+ /* No-op */
+ break;
+
+ case DESIGNWARE_PCIE_MSI_ADDR_LO:
+ root->msi.base &= 0xFFFFFFFF00000000ULL;
+ root->msi.base |= val;
+ break;
+
+ case DESIGNWARE_PCIE_MSI_ADDR_HI:
+ root->msi.base &= 0x00000000FFFFFFFFULL;
+ root->msi.base |= (uint64_t)val << 32;
+ break;
+
+ case DESIGNWARE_PCIE_MSI_INTR0_ENABLE: {
+ const bool update_msi_mapping = !root->msi.intr[0].enable ^ !!val;
+
+ root->msi.intr[0].enable = val;
+
+ if (update_msi_mapping) {
+ designware_pcie_root_update_msi_mapping(root);
+ }
+ break;
+ }
+
+ case DESIGNWARE_PCIE_MSI_INTR0_MASK:
+ root->msi.intr[0].mask = val;
+ break;
+
+ case DESIGNWARE_PCIE_MSI_INTR0_STATUS:
+ root->msi.intr[0].status ^= val;
+ if (!root->msi.intr[0].status) {
+ qemu_set_irq(host->pci.irqs[0], 0);
+ }
+ break;
+
+ case DESIGNWARE_PCIE_ATU_VIEWPORT:
+ root->atu_viewport = val;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_LOWER_BASE:
+ viewport->base &= 0xFFFFFFFF00000000ULL;
+ viewport->base |= val;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_UPPER_BASE:
+ viewport->base &= 0x00000000FFFFFFFFULL;
+ viewport->base |= (uint64_t)val << 32;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_LOWER_TARGET:
+ viewport->target &= 0xFFFFFFFF00000000ULL;
+ viewport->target |= val;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_UPPER_TARGET:
+ viewport->target &= 0x00000000FFFFFFFFULL;
+ viewport->target |= val;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_LIMIT:
+ viewport->limit = val;
+ break;
+
+ case DESIGNWARE_PCIE_ATU_CR1:
+ viewport->cr[0] = val;
+ break;
+ case DESIGNWARE_PCIE_ATU_CR2:
+ viewport->cr[1] = val;
+ designware_pcie_update_viewport(root, viewport);
+ break;
+
+ default:
+ pci_bridge_write_config(d, address, val, len);
+ break;
+ }
+}
+
+static char *designware_pcie_viewport_name(const char *direction,
+ unsigned int i,
+ const char *type)
+{
+ return g_strdup_printf("PCI %s Viewport %u [%s]",
+ direction, i, type);
+}
+
+static void designware_pcie_root_realize(PCIDevice *dev, Error **errp)
+{
+ DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(dev);
+ DesignwarePCIEHost *host = designware_pcie_root_to_host(root);
+ MemoryRegion *address_space = &host->pci.memory;
+ PCIBridge *br = PCI_BRIDGE(dev);
+ DesignwarePCIEViewport *viewport;
+ /*
+ * Dummy values used for initial configuration of MemoryRegions
+ * that belong to a given viewport
+ */
+ const hwaddr dummy_offset = 0;
+ const uint64_t dummy_size = 4;
+ size_t i;
+
+ br->bus_name = "dw-pcie";
+
+ pci_set_word(dev->config + PCI_COMMAND,
+ PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+
+ pci_config_set_interrupt_pin(dev->config, 1);
+ pci_bridge_initfn(dev, TYPE_PCIE_BUS);
+
+ pcie_port_init_reg(dev);
+
+ pcie_cap_init(dev, 0x70, PCI_EXP_TYPE_ROOT_PORT,
+ 0, &error_fatal);
+
+ msi_nonbroken = true;
+ msi_init(dev, 0x50, 32, true, true, &error_fatal);
+
+ for (i = 0; i < DESIGNWARE_PCIE_NUM_VIEWPORTS; i++) {
+ MemoryRegion *source, *destination, *mem;
+ const char *direction;
+ char *name;
+
+ viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_INBOUND][i];
+ viewport->inbound = true;
+ viewport->base = 0x0000000000000000ULL;
+ viewport->target = 0x0000000000000000ULL;
+ viewport->limit = UINT32_MAX;
+ viewport->cr[0] = DESIGNWARE_PCIE_ATU_TYPE_MEM;
+
+ source = &host->pci.address_space_root;
+ destination = get_system_memory();
+ direction = "Inbound";
+
+ /*
+ * Configure MemoryRegion implementing PCI -> CPU memory
+ * access
+ */
+ mem = &viewport->mem;
+ name = designware_pcie_viewport_name(direction, i, "MEM");
+ memory_region_init_alias(mem, OBJECT(root), name, destination,
+ dummy_offset, dummy_size);
+ memory_region_add_subregion_overlap(source, dummy_offset, mem, -1);
+ memory_region_set_enabled(mem, false);
+ g_free(name);
+
+ viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_OUTBOUND][i];
+ viewport->root = root;
+ viewport->inbound = false;
+ viewport->base = 0x0000000000000000ULL;
+ viewport->target = 0x0000000000000000ULL;
+ viewport->limit = UINT32_MAX;
+ viewport->cr[0] = DESIGNWARE_PCIE_ATU_TYPE_MEM;
+
+ destination = &host->pci.memory;
+ direction = "Outbound";
+ source = get_system_memory();
+
+ /*
+ * Configure MemoryRegion implementing CPU -> PCI memory
+ * access
+ */
+ mem = &viewport->mem;
+ name = designware_pcie_viewport_name(direction, i, "MEM");
+ memory_region_init_alias(mem, OBJECT(root), name, destination,
+ dummy_offset, dummy_size);
+ memory_region_add_subregion(source, dummy_offset, mem);
+ memory_region_set_enabled(mem, false);
+ g_free(name);
+
+ /*
+ * Configure MemoryRegion implementing access to configuration
+ * space
+ */
+ mem = &viewport->cfg;
+ name = designware_pcie_viewport_name(direction, i, "CFG");
+ memory_region_init_io(&viewport->cfg, OBJECT(root),
+ &designware_pci_host_conf_ops,
+ viewport, name, dummy_size);
+ memory_region_add_subregion(source, dummy_offset, mem);
+ memory_region_set_enabled(mem, false);
+ g_free(name);
+ }
+
+ /*
+ * If no inbound iATU windows are configured, HW defaults to
+ * letting inbound TLPs to pass in. We emulate that by exlicitly
+ * configuring first inbound window to cover all of target's
+ * address space.
+ *
+ * NOTE: This will not work correctly for the case when first
+ * configured inbound window is window 0
+ */
+ viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_INBOUND][0];
+ viewport->cr[1] = DESIGNWARE_PCIE_ATU_ENABLE;
+ designware_pcie_update_viewport(root, viewport);
+
+ memory_region_init_io(&root->msi.iomem, OBJECT(root),
+ &designware_pci_host_msi_ops,
+ root, "pcie-msi", 0x4);
+ /*
+ * We initially place MSI interrupt I/O region a adress 0 and
+ * disable it. It'll be later moved to correct offset and enabled
+ * in designware_pcie_root_update_msi_mapping() as a part of
+ * initialization done by guest OS
+ */
+ memory_region_add_subregion(address_space, dummy_offset, &root->msi.iomem);
+ memory_region_set_enabled(&root->msi.iomem, false);
+}
+
+static void designware_pcie_set_irq(void *opaque, int irq_num, int level)
+{
+ DesignwarePCIEHost *host = DESIGNWARE_PCIE_HOST(opaque);
+
+ qemu_set_irq(host->pci.irqs[irq_num], level);
+}
+
+static const char *
+designware_pcie_host_root_bus_path(PCIHostState *host_bridge, PCIBus *rootbus)
+{
+ return "0000:00";
+}
+
+static const VMStateDescription vmstate_designware_pcie_msi_bank = {
+ .name = "designware-pcie-msi-bank",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(enable, DesignwarePCIEMSIBank),
+ VMSTATE_UINT32(mask, DesignwarePCIEMSIBank),
+ VMSTATE_UINT32(status, DesignwarePCIEMSIBank),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_designware_pcie_msi = {
+ .name = "designware-pcie-msi",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(base, DesignwarePCIEMSI),
+ VMSTATE_STRUCT_ARRAY(intr,
+ DesignwarePCIEMSI,
+ DESIGNWARE_PCIE_NUM_MSI_BANKS,
+ 1,
+ vmstate_designware_pcie_msi_bank,
+ DesignwarePCIEMSIBank),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_designware_pcie_viewport = {
+ .name = "designware-pcie-viewport",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(base, DesignwarePCIEViewport),
+ VMSTATE_UINT64(target, DesignwarePCIEViewport),
+ VMSTATE_UINT32(limit, DesignwarePCIEViewport),
+ VMSTATE_UINT32_ARRAY(cr, DesignwarePCIEViewport, 2),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_designware_pcie_root = {
+ .name = "designware-pcie-root",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_PCI_DEVICE(parent_obj, PCIBridge),
+ VMSTATE_UINT32(atu_viewport, DesignwarePCIERoot),
+ VMSTATE_STRUCT_2DARRAY(viewports,
+ DesignwarePCIERoot,
+ 2,
+ DESIGNWARE_PCIE_NUM_VIEWPORTS,
+ 1,
+ vmstate_designware_pcie_viewport,
+ DesignwarePCIEViewport),
+ VMSTATE_STRUCT(msi,
+ DesignwarePCIERoot,
+ 1,
+ vmstate_designware_pcie_msi,
+ DesignwarePCIEMSI),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void designware_pcie_root_class_init(ObjectClass *klass, void *data)
+{
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+
+ k->vendor_id = PCI_VENDOR_ID_SYNOPSYS;
+ k->device_id = 0xABCD;
+ k->revision = 0;
+ k->class_id = PCI_CLASS_BRIDGE_PCI;
+ k->is_bridge = true;
+ k->exit = pci_bridge_exitfn;
+ k->realize = designware_pcie_root_realize;
+ k->config_read = designware_pcie_root_config_read;
+ k->config_write = designware_pcie_root_config_write;
+
+ dc->reset = pci_bridge_reset;
+ /*
+ * PCI-facing part of the host bridge, not usable without the
+ * host-facing part, which can't be device_add'ed, yet.
+ */
+ dc->user_creatable = false;
+ dc->vmsd = &vmstate_designware_pcie_root;
+}
+
+static uint64_t designware_pcie_host_mmio_read(void *opaque, hwaddr addr,
+ unsigned int size)
+{
+ PCIHostState *pci = PCI_HOST_BRIDGE(opaque);
+ PCIDevice *device = pci_find_device(pci->bus, 0, 0);
+
+ return pci_host_config_read_common(device,
+ addr,
+ pci_config_size(device),
+ size);
+}
+
+static void designware_pcie_host_mmio_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned int size)
+{
+ PCIHostState *pci = PCI_HOST_BRIDGE(opaque);
+ PCIDevice *device = pci_find_device(pci->bus, 0, 0);
+
+ return pci_host_config_write_common(device,
+ addr,
+ pci_config_size(device),
+ val, size);
+}
+
+static const MemoryRegionOps designware_pci_mmio_ops = {
+ .read = designware_pcie_host_mmio_read,
+ .write = designware_pcie_host_mmio_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .impl = {
+ /*
+ * Our device would not work correctly if the guest was doing
+ * unaligned access. This might not be a limitation on the real
+ * device but in practice there is no reason for a guest to access
+ * this device unaligned.
+ */
+ .min_access_size = 4,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+};
+
+static AddressSpace *designware_pcie_host_set_iommu(PCIBus *bus, void *opaque,
+ int devfn)
+{
+ DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(opaque);
+
+ return &s->pci.address_space;
+}
+
+static void designware_pcie_host_realize(DeviceState *dev, Error **errp)
+{
+ PCIHostState *pci = PCI_HOST_BRIDGE(dev);
+ DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(dev);
+ SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(s->pci.irqs); i++) {
+ sysbus_init_irq(sbd, &s->pci.irqs[i]);
+ }
+
+ memory_region_init_io(&s->mmio,
+ OBJECT(s),
+ &designware_pci_mmio_ops,
+ s,
+ "pcie.reg", 4 * 1024);
+ sysbus_init_mmio(sbd, &s->mmio);
+
+ memory_region_init(&s->pci.io, OBJECT(s), "pcie-pio", 16);
+ memory_region_init(&s->pci.memory, OBJECT(s),
+ "pcie-bus-memory",
+ UINT64_MAX);
+
+ pci->bus = pci_register_root_bus(dev, "pcie",
+ designware_pcie_set_irq,
+ pci_swizzle_map_irq_fn,
+ s,
+ &s->pci.memory,
+ &s->pci.io,
+ 0, 4,
+ TYPE_PCIE_BUS);
+
+ memory_region_init(&s->pci.address_space_root,
+ OBJECT(s),
+ "pcie-bus-address-space-root",
+ UINT64_MAX);
+ memory_region_add_subregion(&s->pci.address_space_root,
+ 0x0, &s->pci.memory);
+ address_space_init(&s->pci.address_space,
+ &s->pci.address_space_root,
+ "pcie-bus-address-space");
+ pci_setup_iommu(pci->bus, designware_pcie_host_set_iommu, s);
+
+ qdev_set_parent_bus(DEVICE(&s->root), BUS(pci->bus));
+ qdev_init_nofail(DEVICE(&s->root));
+}
+
+static const VMStateDescription vmstate_designware_pcie_host = {
+ .name = "designware-pcie-host",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_STRUCT(root,
+ DesignwarePCIEHost,
+ 1,
+ vmstate_designware_pcie_root,
+ DesignwarePCIERoot),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void designware_pcie_host_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
+
+ hc->root_bus_path = designware_pcie_host_root_bus_path;
+ dc->realize = designware_pcie_host_realize;
+ set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+ dc->fw_name = "pci";
+ dc->vmsd = &vmstate_designware_pcie_host;
+}
+
+static void designware_pcie_host_init(Object *obj)
+{
+ DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(obj);
+ DesignwarePCIERoot *root = &s->root;
+
+ object_initialize(root, sizeof(*root), TYPE_DESIGNWARE_PCIE_ROOT);
+ object_property_add_child(obj, "root", OBJECT(root), NULL);
+ qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
+ qdev_prop_set_bit(DEVICE(root), "multifunction", false);
+}
+
+static const TypeInfo designware_pcie_root_info = {
+ .name = TYPE_DESIGNWARE_PCIE_ROOT,
+ .parent = TYPE_PCI_BRIDGE,
+ .instance_size = sizeof(DesignwarePCIERoot),
+ .class_init = designware_pcie_root_class_init,
+ .interfaces = (InterfaceInfo[]) {
+ { INTERFACE_PCIE_DEVICE },
+ { }
+ },
+};
+
+static const TypeInfo designware_pcie_host_info = {
+ .name = TYPE_DESIGNWARE_PCIE_HOST,
+ .parent = TYPE_PCI_HOST_BRIDGE,
+ .instance_size = sizeof(DesignwarePCIEHost),
+ .instance_init = designware_pcie_host_init,
+ .class_init = designware_pcie_host_class_init,
+};
+
+static void designware_pcie_register(void)
+{
+ type_register_static(&designware_pcie_root_info);
+ type_register_static(&designware_pcie_host_info);
+}
+type_init(designware_pcie_register)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-30 19:33:02 +0000