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qemu/hw/pci-host/designware.c
Guenter Roeck 8a73152020 pci-host: designware: Limit value range of iATU viewport register 
The latest version of qemu (v8.2.0-869-g7a1dc45af5) crashes when booting
the mcimx7d-sabre emulation with Linux v5.11 and later.

qemu-system-arm: ../system/memory.c:2750: memory_region_set_alias_offset: Assertion `mr->alias' failed.

Problem is that the Designware PCIe emulation accepts the full value range
for the iATU Viewport Register. However, both hardware and emulation only
support four inbound and four outbound viewports.

The Linux kernel determines the number of supported viewports by writing
0xff into the viewport register and reading the value back. The expected
value when reading the register is the highest supported viewport index.
Match that code by masking the supported viewport value range when the
register is written. With this change, the Linux kernel reports

imx6q-pcie 33800000.pcie: iATU: unroll F, 4 ob, 4 ib, align 0K, limit 4G

as expected and supported.

Fixes: d64e5eabc4 ("pci: Add support for Designware IP block")
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Nikita Ostrenkov <n.ostrenkov@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Message-id: 20240129060055.2616989-1-linux@roeck-us.net
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-02-02 13:51:58 +00:00

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/*
* 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 2.1 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 "qemu/module.h"
#include "qemu/log.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/qdev-properties.h"
#include "migration/vmstate.h"
#include "hw/irq.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
#define DESIGNWARE_PCIE_IRQ_MSI 3
static DesignwarePCIEHost *
designware_pcie_root_to_host(DesignwarePCIERoot *root)
{
BusState *bus = qdev_get_parent_bus(DEVICE(root));
return DESIGNWARE_PCIE_HOST(bus->parent);
}
static uint64_t designware_pcie_root_msi_read(void *opaque, hwaddr addr,
unsigned size)
{
/*
* Attempts to read from the MSI address are undefined in
* the PCI specifications. For this hardware, the datasheet
* specifies that a read from the magic address is simply not
* intercepted by the MSI controller, and will go out to the
* AHB/AXI bus like any other PCI-device-initiated DMA read.
* This is not trivial to implement in QEMU, so since
* well-behaved guests won't ever ask a PCI device to DMA from
* this address we just log the missing functionality.
*/
qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
return 0;
}
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[DESIGNWARE_PCIE_IRQ_MSI], 1);
}
}
static const MemoryRegionOps designware_pci_host_msi_ops = {
.read = designware_pcie_root_msi_read,
.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:
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;
designware_pcie_root_update_msi_mapping(root);
break;
case DESIGNWARE_PCIE_MSI_ADDR_HI:
root->msi.base &= 0x00000000FFFFFFFFULL;
root->msi.base |= (uint64_t)val << 32;
designware_pcie_root_update_msi_mapping(root);
break;
case DESIGNWARE_PCIE_MSI_INTR0_ENABLE:
root->msi.intr[0].enable = val;
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[DESIGNWARE_PCIE_IRQ_MSI], 0);
}
break;
case DESIGNWARE_PCIE_ATU_VIEWPORT:
val &= DESIGNWARE_PCIE_ATU_REGION_INBOUND |
(DESIGNWARE_PCIE_NUM_VIEWPORTS - 1);
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 explicitly
* 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 at address 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 = (const 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 = (const 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 = (const 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 = (const 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->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 const PCIIOMMUOps designware_iommu_ops = {
.get_address_space = designware_pcie_host_set_iommu,
};
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);
pci->bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE;
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_iommu_ops, s);
qdev_realize(DEVICE(&s->root), BUS(pci->bus), &error_fatal);
}
static const VMStateDescription vmstate_designware_pcie_host = {
.name = "designware-pcie-host",
.version_id = 1,
.minimum_version_id = 1,
.fields = (const 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_child(obj, "root", root, TYPE_DESIGNWARE_PCIE_ROOT);
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)
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