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qemu-e2k/hw/pci-host/designware.c
Yi Liu ba7d12eb8c hw/pci: modify pci_setup_iommu() to set PCIIOMMUOps 
This patch modifies pci_setup_iommu() to set PCIIOMMUOps
instead of setting PCIIOMMUFunc. PCIIOMMUFunc is used to
get an address space for a PCI device in vendor specific
way. The PCIIOMMUOps still offers this functionality. But
using PCIIOMMUOps leaves space to add more iommu related
vendor specific operations.

Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Yi Sun <yi.y.sun@linux.intel.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Hervé Poussineau <hpoussin@reactos.org>
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Cc: BALATON Zoltan <balaton@eik.bme.hu>
Cc: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Cc: Jagannathan Raman <jag.raman@oracle.com>
Cc: Matthew Rosato <mjrosato@linux.ibm.com>
Cc: Eric Farman <farman@linux.ibm.com>
Cc: Halil Pasic <pasic@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Helge Deller <deller@gmx.de>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
[ clg: - refreshed on latest QEMU
       - included hw/remote/iommu.c
       - documentation update
       - asserts in pci_setup_iommu()
       - removed checks on iommu_bus->iommu_ops->get_address_space
       - included Elroy PCI host (PA-RISC) ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
2023-11-03 09:20:31 +01:00

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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:
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 = (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->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 = (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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