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qemu-patch-raspberry4/hw/ppc/spapr_pci.c
Greg Kurz 9cbe305b60 spapr_pci: fix MSI/MSIX selection 
In various place we don't correctly check if the device supports MSI or
MSI-X. This can cause devices to be advertised with MSI support, even
if they only support MSI-X (like virtio-pci-* devices for example):

                ethernet@0 {
                        ibm,req#msi = <0x1>; <--- wrong!
			.
			ibm,loc-code = "qemu_virtio-net-pci:0000:00:00.0";
			.
			ibm,req#msi-x = <0x3>;
                };

Worse, this can also cause the "ibm,change-msi" RTAS call to corrupt the
PCI status and cause migration to fail:

  qemu-system-ppc64: get_pci_config_device: Bad config data: i=0x6
    read: 0 device: 10 cmask: 10 wmask: 0 w1cmask:0
                              ^^
           PCI_STATUS_CAP_LIST bit which is assumed to be constant

This patch changes spapr_populate_pci_child_dt() to properly check for
MSI support using msi_present(): this ensures that PCIDevice::msi_cap
was set by msi_init() and that msi_nr_vectors_allocated() will look at
the right place in the config space.

Checking PCIDevice::msix_entries_nr is enough for MSI-X but let's add
a call to msix_present() there as well for consistency.

It also changes rtas_ibm_change_msi() to select the appropriate MSI
type in Function 1 instead of always selecting plain MSI. This new
behaviour is compliant with LoPAPR 1.1, as described in "Table 71.
ibm,change-msi Argument Call Buffer":

  Function 1: If Number Outputs is equal to 3, request to set to a new
           number of MSIs (including set to 0).
           If the “ibm,change-msix-capable” property exists and Number
           Outputs is equal to 4, request is to set to a new number of
           MSI or MSI-X (platform choice) interrupts (including set to
           0).

Since MSI is the the platform default (LoPAPR 6.2.3 MSI Option), let's
check for MSI support first.

And finally, it checks the input parameters are valid, as described in
LoPAPR 1.1 "R1–7.3.10.5.1–3":

  For the MSI option: The platform must return a Status of -3 (Parameter
  error) from ibm,change-msi, with no change in interrupt assignments if
  the PCI configuration address does not support MSI and Function 3 was
  requested (that is, the “ibm,req#msi” property must exist for the PCI
  configuration address in order to use Function 3), or does not support
  MSI-X and Function 4 is requested (that is, the “ibm,req#msi-x” property
  must exist for the PCI configuration address in order to use Function 4),
  or if neither MSIs nor MSI-Xs are supported and Function 1 is requested.

This ensures that the ret_intr_type variable contains a valid MSI type
for this device, and that spapr_msi_setmsg() won't corrupt the PCI status.

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-01-29 14:24:41 +11:00

2256 lines
73 KiB
C
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/*
* QEMU sPAPR PCI host originated from Uninorth PCI host
*
* Copyright (c) 2011 Alexey Kardashevskiy, IBM Corporation.
* Copyright (C) 2011 David Gibson, IBM Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/hw.h"
#include "hw/sysbus.h"
#include "hw/pci/pci.h"
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "hw/pci/pci_host.h"
#include "hw/ppc/spapr.h"
#include "hw/pci-host/spapr.h"
#include "exec/address-spaces.h"
#include "exec/ram_addr.h"
#include <libfdt.h>
#include "trace.h"
#include "qemu/error-report.h"
#include "qapi/qmp/qerror.h"
#include "hw/ppc/fdt.h"
#include "hw/pci/pci_bridge.h"
#include "hw/pci/pci_bus.h"
#include "hw/pci/pci_ids.h"
#include "hw/ppc/spapr_drc.h"
#include "sysemu/device_tree.h"
#include "sysemu/kvm.h"
#include "sysemu/hostmem.h"
#include "sysemu/numa.h"
/* Copied from the kernel arch/powerpc/platforms/pseries/msi.c */
#define RTAS_QUERY_FN 0
#define RTAS_CHANGE_FN 1
#define RTAS_RESET_FN 2
#define RTAS_CHANGE_MSI_FN 3
#define RTAS_CHANGE_MSIX_FN 4
/* Interrupt types to return on RTAS_CHANGE_* */
#define RTAS_TYPE_MSI 1
#define RTAS_TYPE_MSIX 2
sPAPRPHBState *spapr_pci_find_phb(sPAPRMachineState *spapr, uint64_t buid)
{
sPAPRPHBState *sphb;
QLIST_FOREACH(sphb, &spapr->phbs, list) {
if (sphb->buid != buid) {
continue;
}
return sphb;
}
return NULL;
}
PCIDevice *spapr_pci_find_dev(sPAPRMachineState *spapr, uint64_t buid,
uint32_t config_addr)
{
sPAPRPHBState *sphb = spapr_pci_find_phb(spapr, buid);
PCIHostState *phb = PCI_HOST_BRIDGE(sphb);
int bus_num = (config_addr >> 16) & 0xFF;
int devfn = (config_addr >> 8) & 0xFF;
if (!phb) {
return NULL;
}
return pci_find_device(phb->bus, bus_num, devfn);
}
static uint32_t rtas_pci_cfgaddr(uint32_t arg)
{
/* This handles the encoding of extended config space addresses */
return ((arg >> 20) & 0xf00) | (arg & 0xff);
}
static void finish_read_pci_config(sPAPRMachineState *spapr, uint64_t buid,
uint32_t addr, uint32_t size,
target_ulong rets)
{
PCIDevice *pci_dev;
uint32_t val;
if ((size != 1) && (size != 2) && (size != 4)) {
/* access must be 1, 2 or 4 bytes */
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
pci_dev = spapr_pci_find_dev(spapr, buid, addr);
addr = rtas_pci_cfgaddr(addr);
if (!pci_dev || (addr % size) || (addr >= pci_config_size(pci_dev))) {
/* Access must be to a valid device, within bounds and
* naturally aligned */
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
val = pci_host_config_read_common(pci_dev, addr,
pci_config_size(pci_dev), size);
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
rtas_st(rets, 1, val);
}
static void rtas_ibm_read_pci_config(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
uint64_t buid;
uint32_t size, addr;
if ((nargs != 4) || (nret != 2)) {
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
buid = rtas_ldq(args, 1);
size = rtas_ld(args, 3);
addr = rtas_ld(args, 0);
finish_read_pci_config(spapr, buid, addr, size, rets);
}
static void rtas_read_pci_config(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
uint32_t size, addr;
if ((nargs != 2) || (nret != 2)) {
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
size = rtas_ld(args, 1);
addr = rtas_ld(args, 0);
finish_read_pci_config(spapr, 0, addr, size, rets);
}
static void finish_write_pci_config(sPAPRMachineState *spapr, uint64_t buid,
uint32_t addr, uint32_t size,
uint32_t val, target_ulong rets)
{
PCIDevice *pci_dev;
if ((size != 1) && (size != 2) && (size != 4)) {
/* access must be 1, 2 or 4 bytes */
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
pci_dev = spapr_pci_find_dev(spapr, buid, addr);
addr = rtas_pci_cfgaddr(addr);
if (!pci_dev || (addr % size) || (addr >= pci_config_size(pci_dev))) {
/* Access must be to a valid device, within bounds and
* naturally aligned */
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
pci_host_config_write_common(pci_dev, addr, pci_config_size(pci_dev),
val, size);
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}
static void rtas_ibm_write_pci_config(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
uint64_t buid;
uint32_t val, size, addr;
if ((nargs != 5) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
buid = rtas_ldq(args, 1);
val = rtas_ld(args, 4);
size = rtas_ld(args, 3);
addr = rtas_ld(args, 0);
finish_write_pci_config(spapr, buid, addr, size, val, rets);
}
static void rtas_write_pci_config(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
uint32_t val, size, addr;
if ((nargs != 3) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
val = rtas_ld(args, 2);
size = rtas_ld(args, 1);
addr = rtas_ld(args, 0);
finish_write_pci_config(spapr, 0, addr, size, val, rets);
}
/*
* Set MSI/MSIX message data.
* This is required for msi_notify()/msix_notify() which
* will write at the addresses via spapr_msi_write().
*
* If hwaddr == 0, all entries will have .data == first_irq i.e.
* table will be reset.
*/
static void spapr_msi_setmsg(PCIDevice *pdev, hwaddr addr, bool msix,
unsigned first_irq, unsigned req_num)
{
unsigned i;
MSIMessage msg = { .address = addr, .data = first_irq };
if (!msix) {
msi_set_message(pdev, msg);
trace_spapr_pci_msi_setup(pdev->name, 0, msg.address);
return;
}
for (i = 0; i < req_num; ++i) {
msix_set_message(pdev, i, msg);
trace_spapr_pci_msi_setup(pdev->name, i, msg.address);
if (addr) {
++msg.data;
}
}
}
static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
uint32_t config_addr = rtas_ld(args, 0);
uint64_t buid = rtas_ldq(args, 1);
unsigned int func = rtas_ld(args, 3);
unsigned int req_num = rtas_ld(args, 4); /* 0 == remove all */
unsigned int seq_num = rtas_ld(args, 5);
unsigned int ret_intr_type;
unsigned int irq, max_irqs = 0;
sPAPRPHBState *phb = NULL;
PCIDevice *pdev = NULL;
spapr_pci_msi *msi;
int *config_addr_key;
Error *err = NULL;
/* Fins sPAPRPHBState */
phb = spapr_pci_find_phb(spapr, buid);
if (phb) {
pdev = spapr_pci_find_dev(spapr, buid, config_addr);
}
if (!phb || !pdev) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
switch (func) {
case RTAS_CHANGE_FN:
if (msi_present(pdev)) {
ret_intr_type = RTAS_TYPE_MSI;
} else if (msix_present(pdev)) {
ret_intr_type = RTAS_TYPE_MSIX;
} else {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
break;
case RTAS_CHANGE_MSI_FN:
if (msi_present(pdev)) {
ret_intr_type = RTAS_TYPE_MSI;
} else {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
break;
case RTAS_CHANGE_MSIX_FN:
if (msix_present(pdev)) {
ret_intr_type = RTAS_TYPE_MSIX;
} else {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
break;
default:
error_report("rtas_ibm_change_msi(%u) is not implemented", func);
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
msi = (spapr_pci_msi *) g_hash_table_lookup(phb->msi, &config_addr);
/* Releasing MSIs */
if (!req_num) {
if (!msi) {
trace_spapr_pci_msi("Releasing wrong config", config_addr);
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
spapr_irq_free(spapr, msi->first_irq, msi->num);
if (msi_present(pdev)) {
spapr_msi_setmsg(pdev, 0, false, 0, 0);
}
if (msix_present(pdev)) {
spapr_msi_setmsg(pdev, 0, true, 0, 0);
}
g_hash_table_remove(phb->msi, &config_addr);
trace_spapr_pci_msi("Released MSIs", config_addr);
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
rtas_st(rets, 1, 0);
return;
}
/* Enabling MSI */
/* Check if the device supports as many IRQs as requested */
if (ret_intr_type == RTAS_TYPE_MSI) {
max_irqs = msi_nr_vectors_allocated(pdev);
} else if (ret_intr_type == RTAS_TYPE_MSIX) {
max_irqs = pdev->msix_entries_nr;
}
if (!max_irqs) {
error_report("Requested interrupt type %d is not enabled for device %x",
ret_intr_type, config_addr);
rtas_st(rets, 0, -1); /* Hardware error */
return;
}
/* Correct the number if the guest asked for too many */
if (req_num > max_irqs) {
trace_spapr_pci_msi_retry(config_addr, req_num, max_irqs);
req_num = max_irqs;
irq = 0; /* to avoid misleading trace */
goto out;
}
/* Allocate MSIs */
irq = spapr_irq_alloc_block(spapr, req_num, false,
ret_intr_type == RTAS_TYPE_MSI, &err);
if (err) {
error_reportf_err(err, "Can't allocate MSIs for device %x: ",
config_addr);
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
/* Release previous MSIs */
if (msi) {
spapr_irq_free(spapr, msi->first_irq, msi->num);
g_hash_table_remove(phb->msi, &config_addr);
}
/* Setup MSI/MSIX vectors in the device (via cfgspace or MSIX BAR) */
spapr_msi_setmsg(pdev, SPAPR_PCI_MSI_WINDOW, ret_intr_type == RTAS_TYPE_MSIX,
irq, req_num);
/* Add MSI device to cache */
msi = g_new(spapr_pci_msi, 1);
msi->first_irq = irq;
msi->num = req_num;
config_addr_key = g_new(int, 1);
*config_addr_key = config_addr;
g_hash_table_insert(phb->msi, config_addr_key, msi);
out:
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
rtas_st(rets, 1, req_num);
rtas_st(rets, 2, ++seq_num);
if (nret > 3) {
rtas_st(rets, 3, ret_intr_type);
}
trace_spapr_pci_rtas_ibm_change_msi(config_addr, func, req_num, irq);
}
static void rtas_ibm_query_interrupt_source_number(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
uint32_t token,
uint32_t nargs,
target_ulong args,
uint32_t nret,
target_ulong rets)
{
uint32_t config_addr = rtas_ld(args, 0);
uint64_t buid = rtas_ldq(args, 1);
unsigned int intr_src_num = -1, ioa_intr_num = rtas_ld(args, 3);
sPAPRPHBState *phb = NULL;
PCIDevice *pdev = NULL;
spapr_pci_msi *msi;
/* Find sPAPRPHBState */
phb = spapr_pci_find_phb(spapr, buid);
if (phb) {
pdev = spapr_pci_find_dev(spapr, buid, config_addr);
}
if (!phb || !pdev) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
/* Find device descriptor and start IRQ */
msi = (spapr_pci_msi *) g_hash_table_lookup(phb->msi, &config_addr);
if (!msi || !msi->first_irq || !msi->num || (ioa_intr_num >= msi->num)) {
trace_spapr_pci_msi("Failed to return vector", config_addr);
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
return;
}
intr_src_num = msi->first_irq + ioa_intr_num;
trace_spapr_pci_rtas_ibm_query_interrupt_source_number(ioa_intr_num,
intr_src_num);
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
rtas_st(rets, 1, intr_src_num);
rtas_st(rets, 2, 1);/* 0 == level; 1 == edge */
}
static void rtas_ibm_set_eeh_option(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
sPAPRPHBState *sphb;
uint32_t addr, option;
uint64_t buid;
int ret;
if ((nargs != 4) || (nret != 1)) {
goto param_error_exit;
}
buid = rtas_ldq(args, 1);
addr = rtas_ld(args, 0);
option = rtas_ld(args, 3);
sphb = spapr_pci_find_phb(spapr, buid);
if (!sphb) {
goto param_error_exit;
}
if (!spapr_phb_eeh_available(sphb)) {
goto param_error_exit;
}
ret = spapr_phb_vfio_eeh_set_option(sphb, addr, option);
rtas_st(rets, 0, ret);
return;
param_error_exit:
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}
static void rtas_ibm_get_config_addr_info2(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
sPAPRPHBState *sphb;
PCIDevice *pdev;
uint32_t addr, option;
uint64_t buid;
if ((nargs != 4) || (nret != 2)) {
goto param_error_exit;
}
buid = rtas_ldq(args, 1);
sphb = spapr_pci_find_phb(spapr, buid);
if (!sphb) {
goto param_error_exit;
}
if (!spapr_phb_eeh_available(sphb)) {
goto param_error_exit;
}
/*
* We always have PE address of form "00BB0001". "BB"
* represents the bus number of PE's primary bus.
*/
option = rtas_ld(args, 3);
switch (option) {
case RTAS_GET_PE_ADDR:
addr = rtas_ld(args, 0);
pdev = spapr_pci_find_dev(spapr, buid, addr);
if (!pdev) {
goto param_error_exit;
}
rtas_st(rets, 1, (pci_bus_num(pci_get_bus(pdev)) << 16) + 1);
break;
case RTAS_GET_PE_MODE:
rtas_st(rets, 1, RTAS_PE_MODE_SHARED);
break;
default:
goto param_error_exit;
}
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
return;
param_error_exit:
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}
static void rtas_ibm_read_slot_reset_state2(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
sPAPRPHBState *sphb;
uint64_t buid;
int state, ret;
if ((nargs != 3) || (nret != 4 && nret != 5)) {
goto param_error_exit;
}
buid = rtas_ldq(args, 1);
sphb = spapr_pci_find_phb(spapr, buid);
if (!sphb) {
goto param_error_exit;
}
if (!spapr_phb_eeh_available(sphb)) {
goto param_error_exit;
}
ret = spapr_phb_vfio_eeh_get_state(sphb, &state);
rtas_st(rets, 0, ret);
if (ret != RTAS_OUT_SUCCESS) {
return;
}
rtas_st(rets, 1, state);
rtas_st(rets, 2, RTAS_EEH_SUPPORT);
rtas_st(rets, 3, RTAS_EEH_PE_UNAVAIL_INFO);
if (nret >= 5) {
rtas_st(rets, 4, RTAS_EEH_PE_RECOVER_INFO);
}
return;
param_error_exit:
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}
static void rtas_ibm_set_slot_reset(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
sPAPRPHBState *sphb;
uint32_t option;
uint64_t buid;
int ret;
if ((nargs != 4) || (nret != 1)) {
goto param_error_exit;
}
buid = rtas_ldq(args, 1);
option = rtas_ld(args, 3);
sphb = spapr_pci_find_phb(spapr, buid);
if (!sphb) {
goto param_error_exit;
}
if (!spapr_phb_eeh_available(sphb)) {
goto param_error_exit;
}
ret = spapr_phb_vfio_eeh_reset(sphb, option);
rtas_st(rets, 0, ret);
return;
param_error_exit:
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}
static void rtas_ibm_configure_pe(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
sPAPRPHBState *sphb;
uint64_t buid;
int ret;
if ((nargs != 3) || (nret != 1)) {
goto param_error_exit;
}
buid = rtas_ldq(args, 1);
sphb = spapr_pci_find_phb(spapr, buid);
if (!sphb) {
goto param_error_exit;
}
if (!spapr_phb_eeh_available(sphb)) {
goto param_error_exit;
}
ret = spapr_phb_vfio_eeh_configure(sphb);
rtas_st(rets, 0, ret);
return;
param_error_exit:
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}
/* To support it later */
static void rtas_ibm_slot_error_detail(PowerPCCPU *cpu,
sPAPRMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
sPAPRPHBState *sphb;
int option;
uint64_t buid;
if ((nargs != 8) || (nret != 1)) {
goto param_error_exit;
}
buid = rtas_ldq(args, 1);
sphb = spapr_pci_find_phb(spapr, buid);
if (!sphb) {
goto param_error_exit;
}
if (!spapr_phb_eeh_available(sphb)) {
goto param_error_exit;
}
option = rtas_ld(args, 7);
switch (option) {
case RTAS_SLOT_TEMP_ERR_LOG:
case RTAS_SLOT_PERM_ERR_LOG:
break;
default:
goto param_error_exit;
}
/* We don't have error log yet */
rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
return;
param_error_exit:
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}
static int pci_spapr_swizzle(int slot, int pin)
{
return (slot + pin) % PCI_NUM_PINS;
}
static int pci_spapr_map_irq(PCIDevice *pci_dev, int irq_num)
{
/*
* Here we need to convert pci_dev + irq_num to some unique value
* which is less than number of IRQs on the specific bus (4). We
* use standard PCI swizzling, that is (slot number + pin number)
* % 4.
*/
return pci_spapr_swizzle(PCI_SLOT(pci_dev->devfn), irq_num);
}
static void pci_spapr_set_irq(void *opaque, int irq_num, int level)
{
/*
* Here we use the number returned by pci_spapr_map_irq to find a
* corresponding qemu_irq.
*/
sPAPRPHBState *phb = opaque;
trace_spapr_pci_lsi_set(phb->dtbusname, irq_num, phb->lsi_table[irq_num].irq);
qemu_set_irq(spapr_phb_lsi_qirq(phb, irq_num), level);
}
static PCIINTxRoute spapr_route_intx_pin_to_irq(void *opaque, int pin)
{
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(opaque);
PCIINTxRoute route;
route.mode = PCI_INTX_ENABLED;
route.irq = sphb->lsi_table[pin].irq;
return route;
}
/*
* MSI/MSIX memory region implementation.
* The handler handles both MSI and MSIX.
* The vector number is encoded in least bits in data.
*/
static void spapr_msi_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
uint32_t irq = data;
trace_spapr_pci_msi_write(addr, data, irq);
qemu_irq_pulse(spapr_qirq(spapr, irq));
}
static const MemoryRegionOps spapr_msi_ops = {
/* There is no .read as the read result is undefined by PCI spec */
.read = NULL,
.write = spapr_msi_write,
.endianness = DEVICE_LITTLE_ENDIAN
};
/*
* PHB PCI device
*/
static AddressSpace *spapr_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
{
sPAPRPHBState *phb = opaque;
return &phb->iommu_as;
}
static char *spapr_phb_vfio_get_loc_code(sPAPRPHBState *sphb, PCIDevice *pdev)
{
char *path = NULL, *buf = NULL, *host = NULL;
/* Get the PCI VFIO host id */
host = object_property_get_str(OBJECT(pdev), "host", NULL);
if (!host) {
goto err_out;
}
/* Construct the path of the file that will give us the DT location */
path = g_strdup_printf("/sys/bus/pci/devices/%s/devspec", host);
g_free(host);
if (!g_file_get_contents(path, &buf, NULL, NULL)) {
goto err_out;
}
g_free(path);
/* Construct and read from host device tree the loc-code */
path = g_strdup_printf("/proc/device-tree%s/ibm,loc-code", buf);
g_free(buf);
if (!g_file_get_contents(path, &buf, NULL, NULL)) {
goto err_out;
}
return buf;
err_out:
g_free(path);
return NULL;
}
static char *spapr_phb_get_loc_code(sPAPRPHBState *sphb, PCIDevice *pdev)
{
char *buf;
const char *devtype = "qemu";
uint32_t busnr = pci_bus_num(PCI_BUS(qdev_get_parent_bus(DEVICE(pdev))));
if (object_dynamic_cast(OBJECT(pdev), "vfio-pci")) {
buf = spapr_phb_vfio_get_loc_code(sphb, pdev);
if (buf) {
return buf;
}
devtype = "vfio";
}
/*
* For emulated devices and VFIO-failure case, make up
* the loc-code.
*/
buf = g_strdup_printf("%s_%s:%04x:%02x:%02x.%x",
devtype, pdev->name, sphb->index, busnr,
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
return buf;
}
/* Macros to operate with address in OF binding to PCI */
#define b_x(x, p, l) (((x) & ((1<<(l))-1)) << (p))
#define b_n(x) b_x((x), 31, 1) /* 0 if relocatable */
#define b_p(x) b_x((x), 30, 1) /* 1 if prefetchable */
#define b_t(x) b_x((x), 29, 1) /* 1 if the address is aliased */
#define b_ss(x) b_x((x), 24, 2) /* the space code */
#define b_bbbbbbbb(x) b_x((x), 16, 8) /* bus number */
#define b_ddddd(x) b_x((x), 11, 5) /* device number */
#define b_fff(x) b_x((x), 8, 3) /* function number */
#define b_rrrrrrrr(x) b_x((x), 0, 8) /* register number */
/* for 'reg'/'assigned-addresses' OF properties */
#define RESOURCE_CELLS_SIZE 2
#define RESOURCE_CELLS_ADDRESS 3
typedef struct ResourceFields {
uint32_t phys_hi;
uint32_t phys_mid;
uint32_t phys_lo;
uint32_t size_hi;
uint32_t size_lo;
} QEMU_PACKED ResourceFields;
typedef struct ResourceProps {
ResourceFields reg[8];
ResourceFields assigned[7];
uint32_t reg_len;
uint32_t assigned_len;
} ResourceProps;
/* fill in the 'reg'/'assigned-resources' OF properties for
* a PCI device. 'reg' describes resource requirements for a
* device's IO/MEM regions, 'assigned-addresses' describes the
* actual resource assignments.
*
* the properties are arrays of ('phys-addr', 'size') pairs describing
* the addressable regions of the PCI device, where 'phys-addr' is a
* RESOURCE_CELLS_ADDRESS-tuple of 32-bit integers corresponding to
* (phys.hi, phys.mid, phys.lo), and 'size' is a
* RESOURCE_CELLS_SIZE-tuple corresponding to (size.hi, size.lo).
*
* phys.hi = 0xYYXXXXZZ, where:
* 0xYY = npt000ss
* ||| |
* ||| +-- space code
* ||| |
* ||| + 00 if configuration space
* ||| + 01 if IO region,
* ||| + 10 if 32-bit MEM region
* ||| + 11 if 64-bit MEM region
* |||
* ||+------ for non-relocatable IO: 1 if aliased
* || for relocatable IO: 1 if below 64KB
* || for MEM: 1 if below 1MB
* |+------- 1 if region is prefetchable
* +-------- 1 if region is non-relocatable
* 0xXXXX = bbbbbbbb dddddfff, encoding bus, slot, and function
* bits respectively
* 0xZZ = rrrrrrrr, the register number of the BAR corresponding
* to the region
*
* phys.mid and phys.lo correspond respectively to the hi/lo portions
* of the actual address of the region.
*
* how the phys-addr/size values are used differ slightly between
* 'reg' and 'assigned-addresses' properties. namely, 'reg' has
* an additional description for the config space region of the
* device, and in the case of QEMU has n=0 and phys.mid=phys.lo=0
* to describe the region as relocatable, with an address-mapping
* that corresponds directly to the PHB's address space for the
* resource. 'assigned-addresses' always has n=1 set with an absolute
* address assigned for the resource. in general, 'assigned-addresses'
* won't be populated, since addresses for PCI devices are generally
* unmapped initially and left to the guest to assign.
*
* note also that addresses defined in these properties are, at least
* for PAPR guests, relative to the PHBs IO/MEM windows, and
* correspond directly to the addresses in the BARs.
*
* in accordance with PCI Bus Binding to Open Firmware,
* IEEE Std 1275-1994, section 4.1.1, as implemented by PAPR+ v2.7,
* Appendix C.
*/
static void populate_resource_props(PCIDevice *d, ResourceProps *rp)
{
int bus_num = pci_bus_num(PCI_BUS(qdev_get_parent_bus(DEVICE(d))));
uint32_t dev_id = (b_bbbbbbbb(bus_num) |
b_ddddd(PCI_SLOT(d->devfn)) |
b_fff(PCI_FUNC(d->devfn)));
ResourceFields *reg, *assigned;
int i, reg_idx = 0, assigned_idx = 0;
/* config space region */
reg = &rp->reg[reg_idx++];
reg->phys_hi = cpu_to_be32(dev_id);
reg->phys_mid = 0;
reg->phys_lo = 0;
reg->size_hi = 0;
reg->size_lo = 0;
for (i = 0; i < PCI_NUM_REGIONS; i++) {
if (!d->io_regions[i].size) {
continue;
}
reg = &rp->reg[reg_idx++];
reg->phys_hi = cpu_to_be32(dev_id | b_rrrrrrrr(pci_bar(d, i)));
if (d->io_regions[i].type & PCI_BASE_ADDRESS_SPACE_IO) {
reg->phys_hi |= cpu_to_be32(b_ss(1));
} else if (d->io_regions[i].type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
reg->phys_hi |= cpu_to_be32(b_ss(3));
} else {
reg->phys_hi |= cpu_to_be32(b_ss(2));
}
reg->phys_mid = 0;
reg->phys_lo = 0;
reg->size_hi = cpu_to_be32(d->io_regions[i].size >> 32);
reg->size_lo = cpu_to_be32(d->io_regions[i].size);
if (d->io_regions[i].addr == PCI_BAR_UNMAPPED) {
continue;
}
assigned = &rp->assigned[assigned_idx++];
assigned->phys_hi = cpu_to_be32(reg->phys_hi | b_n(1));
assigned->phys_mid = cpu_to_be32(d->io_regions[i].addr >> 32);
assigned->phys_lo = cpu_to_be32(d->io_regions[i].addr);
assigned->size_hi = reg->size_hi;
assigned->size_lo = reg->size_lo;
}
rp->reg_len = reg_idx * sizeof(ResourceFields);
rp->assigned_len = assigned_idx * sizeof(ResourceFields);
}
typedef struct PCIClass PCIClass;
typedef struct PCISubClass PCISubClass;
typedef struct PCIIFace PCIIFace;
struct PCIIFace {
int iface;
const char *name;
};
struct PCISubClass {
int subclass;
const char *name;
const PCIIFace *iface;
};
struct PCIClass {
const char *name;
const PCISubClass *subc;
};
static const PCISubClass undef_subclass[] = {
{ PCI_CLASS_NOT_DEFINED_VGA, "display", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass mass_subclass[] = {
{ PCI_CLASS_STORAGE_SCSI, "scsi", NULL },
{ PCI_CLASS_STORAGE_IDE, "ide", NULL },
{ PCI_CLASS_STORAGE_FLOPPY, "fdc", NULL },
{ PCI_CLASS_STORAGE_IPI, "ipi", NULL },
{ PCI_CLASS_STORAGE_RAID, "raid", NULL },
{ PCI_CLASS_STORAGE_ATA, "ata", NULL },
{ PCI_CLASS_STORAGE_SATA, "sata", NULL },
{ PCI_CLASS_STORAGE_SAS, "sas", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass net_subclass[] = {
{ PCI_CLASS_NETWORK_ETHERNET, "ethernet", NULL },
{ PCI_CLASS_NETWORK_TOKEN_RING, "token-ring", NULL },
{ PCI_CLASS_NETWORK_FDDI, "fddi", NULL },
{ PCI_CLASS_NETWORK_ATM, "atm", NULL },
{ PCI_CLASS_NETWORK_ISDN, "isdn", NULL },
{ PCI_CLASS_NETWORK_WORLDFIP, "worldfip", NULL },
{ PCI_CLASS_NETWORK_PICMG214, "picmg", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass displ_subclass[] = {
{ PCI_CLASS_DISPLAY_VGA, "vga", NULL },
{ PCI_CLASS_DISPLAY_XGA, "xga", NULL },
{ PCI_CLASS_DISPLAY_3D, "3d-controller", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass media_subclass[] = {
{ PCI_CLASS_MULTIMEDIA_VIDEO, "video", NULL },
{ PCI_CLASS_MULTIMEDIA_AUDIO, "sound", NULL },
{ PCI_CLASS_MULTIMEDIA_PHONE, "telephony", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass mem_subclass[] = {
{ PCI_CLASS_MEMORY_RAM, "memory", NULL },
{ PCI_CLASS_MEMORY_FLASH, "flash", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass bridg_subclass[] = {
{ PCI_CLASS_BRIDGE_HOST, "host", NULL },
{ PCI_CLASS_BRIDGE_ISA, "isa", NULL },
{ PCI_CLASS_BRIDGE_EISA, "eisa", NULL },
{ PCI_CLASS_BRIDGE_MC, "mca", NULL },
{ PCI_CLASS_BRIDGE_PCI, "pci", NULL },
{ PCI_CLASS_BRIDGE_PCMCIA, "pcmcia", NULL },
{ PCI_CLASS_BRIDGE_NUBUS, "nubus", NULL },
{ PCI_CLASS_BRIDGE_CARDBUS, "cardbus", NULL },
{ PCI_CLASS_BRIDGE_RACEWAY, "raceway", NULL },
{ PCI_CLASS_BRIDGE_PCI_SEMITP, "semi-transparent-pci", NULL },
{ PCI_CLASS_BRIDGE_IB_PCI, "infiniband", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass comm_subclass[] = {
{ PCI_CLASS_COMMUNICATION_SERIAL, "serial", NULL },
{ PCI_CLASS_COMMUNICATION_PARALLEL, "parallel", NULL },
{ PCI_CLASS_COMMUNICATION_MULTISERIAL, "multiport-serial", NULL },
{ PCI_CLASS_COMMUNICATION_MODEM, "modem", NULL },
{ PCI_CLASS_COMMUNICATION_GPIB, "gpib", NULL },
{ PCI_CLASS_COMMUNICATION_SC, "smart-card", NULL },
{ 0xFF, NULL, NULL, },
};
static const PCIIFace pic_iface[] = {
{ PCI_CLASS_SYSTEM_PIC_IOAPIC, "io-apic" },
{ PCI_CLASS_SYSTEM_PIC_IOXAPIC, "io-xapic" },
{ 0xFF, NULL },
};
static const PCISubClass sys_subclass[] = {
{ PCI_CLASS_SYSTEM_PIC, "interrupt-controller", pic_iface },
{ PCI_CLASS_SYSTEM_DMA, "dma-controller", NULL },
{ PCI_CLASS_SYSTEM_TIMER, "timer", NULL },
{ PCI_CLASS_SYSTEM_RTC, "rtc", NULL },
{ PCI_CLASS_SYSTEM_PCI_HOTPLUG, "hot-plug-controller", NULL },
{ PCI_CLASS_SYSTEM_SDHCI, "sd-host-controller", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass inp_subclass[] = {
{ PCI_CLASS_INPUT_KEYBOARD, "keyboard", NULL },
{ PCI_CLASS_INPUT_PEN, "pen", NULL },
{ PCI_CLASS_INPUT_MOUSE, "mouse", NULL },
{ PCI_CLASS_INPUT_SCANNER, "scanner", NULL },
{ PCI_CLASS_INPUT_GAMEPORT, "gameport", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass dock_subclass[] = {
{ PCI_CLASS_DOCKING_GENERIC, "dock", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass cpu_subclass[] = {
{ PCI_CLASS_PROCESSOR_PENTIUM, "pentium", NULL },
{ PCI_CLASS_PROCESSOR_POWERPC, "powerpc", NULL },
{ PCI_CLASS_PROCESSOR_MIPS, "mips", NULL },
{ PCI_CLASS_PROCESSOR_CO, "co-processor", NULL },
{ 0xFF, NULL, NULL },
};
static const PCIIFace usb_iface[] = {
{ PCI_CLASS_SERIAL_USB_UHCI, "usb-uhci" },
{ PCI_CLASS_SERIAL_USB_OHCI, "usb-ohci", },
{ PCI_CLASS_SERIAL_USB_EHCI, "usb-ehci" },
{ PCI_CLASS_SERIAL_USB_XHCI, "usb-xhci" },
{ PCI_CLASS_SERIAL_USB_UNKNOWN, "usb-unknown" },
{ PCI_CLASS_SERIAL_USB_DEVICE, "usb-device" },
{ 0xFF, NULL },
};
static const PCISubClass ser_subclass[] = {
{ PCI_CLASS_SERIAL_FIREWIRE, "firewire", NULL },
{ PCI_CLASS_SERIAL_ACCESS, "access-bus", NULL },
{ PCI_CLASS_SERIAL_SSA, "ssa", NULL },
{ PCI_CLASS_SERIAL_USB, "usb", usb_iface },
{ PCI_CLASS_SERIAL_FIBER, "fibre-channel", NULL },
{ PCI_CLASS_SERIAL_SMBUS, "smb", NULL },
{ PCI_CLASS_SERIAL_IB, "infiniband", NULL },
{ PCI_CLASS_SERIAL_IPMI, "ipmi", NULL },
{ PCI_CLASS_SERIAL_SERCOS, "sercos", NULL },
{ PCI_CLASS_SERIAL_CANBUS, "canbus", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass wrl_subclass[] = {
{ PCI_CLASS_WIRELESS_IRDA, "irda", NULL },
{ PCI_CLASS_WIRELESS_CIR, "consumer-ir", NULL },
{ PCI_CLASS_WIRELESS_RF_CONTROLLER, "rf-controller", NULL },
{ PCI_CLASS_WIRELESS_BLUETOOTH, "bluetooth", NULL },
{ PCI_CLASS_WIRELESS_BROADBAND, "broadband", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass sat_subclass[] = {
{ PCI_CLASS_SATELLITE_TV, "satellite-tv", NULL },
{ PCI_CLASS_SATELLITE_AUDIO, "satellite-audio", NULL },
{ PCI_CLASS_SATELLITE_VOICE, "satellite-voice", NULL },
{ PCI_CLASS_SATELLITE_DATA, "satellite-data", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass crypt_subclass[] = {
{ PCI_CLASS_CRYPT_NETWORK, "network-encryption", NULL },
{ PCI_CLASS_CRYPT_ENTERTAINMENT,
"entertainment-encryption", NULL },
{ 0xFF, NULL, NULL },
};
static const PCISubClass spc_subclass[] = {
{ PCI_CLASS_SP_DPIO, "dpio", NULL },
{ PCI_CLASS_SP_PERF, "counter", NULL },
{ PCI_CLASS_SP_SYNCH, "measurement", NULL },
{ PCI_CLASS_SP_MANAGEMENT, "management-card", NULL },
{ 0xFF, NULL, NULL },
};
static const PCIClass pci_classes[] = {
{ "legacy-device", undef_subclass },
{ "mass-storage", mass_subclass },
{ "network", net_subclass },
{ "display", displ_subclass, },
{ "multimedia-device", media_subclass },
{ "memory-controller", mem_subclass },
{ "unknown-bridge", bridg_subclass },
{ "communication-controller", comm_subclass},
{ "system-peripheral", sys_subclass },
{ "input-controller", inp_subclass },
{ "docking-station", dock_subclass },
{ "cpu", cpu_subclass },
{ "serial-bus", ser_subclass },
{ "wireless-controller", wrl_subclass },
{ "intelligent-io", NULL },
{ "satellite-device", sat_subclass },
{ "encryption", crypt_subclass },
{ "data-processing-controller", spc_subclass },
};
static const char *pci_find_device_name(uint8_t class, uint8_t subclass,
uint8_t iface)
{
const PCIClass *pclass;
const PCISubClass *psubclass;
const PCIIFace *piface;
const char *name;
if (class >= ARRAY_SIZE(pci_classes)) {
return "pci";
}
pclass = pci_classes + class;
name = pclass->name;
if (pclass->subc == NULL) {
return name;
}
psubclass = pclass->subc;
while ((psubclass->subclass & 0xff) != 0xff) {
if ((psubclass->subclass & 0xff) == subclass) {
name = psubclass->name;
break;
}
psubclass++;
}
piface = psubclass->iface;
if (piface == NULL) {
return name;
}
while ((piface->iface & 0xff) != 0xff) {
if ((piface->iface & 0xff) == iface) {
name = piface->name;
break;
}
piface++;
}
return name;
}
static gchar *pci_get_node_name(PCIDevice *dev)
{
int slot = PCI_SLOT(dev->devfn);
int func = PCI_FUNC(dev->devfn);
uint32_t ccode = pci_default_read_config(dev, PCI_CLASS_PROG, 3);
const char *name;
name = pci_find_device_name((ccode >> 16) & 0xff, (ccode >> 8) & 0xff,
ccode & 0xff);
if (func != 0) {
return g_strdup_printf("%s@%x,%x", name, slot, func);
} else {
return g_strdup_printf("%s@%x", name, slot);
}
}
static uint32_t spapr_phb_get_pci_drc_index(sPAPRPHBState *phb,
PCIDevice *pdev);
static void spapr_populate_pci_child_dt(PCIDevice *dev, void *fdt, int offset,
sPAPRPHBState *sphb)
{
ResourceProps rp;
bool is_bridge = false;
int pci_status;
char *buf = NULL;
uint32_t drc_index = spapr_phb_get_pci_drc_index(sphb, dev);
uint32_t ccode = pci_default_read_config(dev, PCI_CLASS_PROG, 3);
uint32_t max_msi, max_msix;
if (pci_default_read_config(dev, PCI_HEADER_TYPE, 1) ==
PCI_HEADER_TYPE_BRIDGE) {
is_bridge = true;
}
/* in accordance with PAPR+ v2.7 13.6.3, Table 181 */
_FDT(fdt_setprop_cell(fdt, offset, "vendor-id",
pci_default_read_config(dev, PCI_VENDOR_ID, 2)));
_FDT(fdt_setprop_cell(fdt, offset, "device-id",
pci_default_read_config(dev, PCI_DEVICE_ID, 2)));
_FDT(fdt_setprop_cell(fdt, offset, "revision-id",
pci_default_read_config(dev, PCI_REVISION_ID, 1)));
_FDT(fdt_setprop_cell(fdt, offset, "class-code", ccode));
if (pci_default_read_config(dev, PCI_INTERRUPT_PIN, 1)) {
_FDT(fdt_setprop_cell(fdt, offset, "interrupts",
pci_default_read_config(dev, PCI_INTERRUPT_PIN, 1)));
}
if (!is_bridge) {
_FDT(fdt_setprop_cell(fdt, offset, "min-grant",
pci_default_read_config(dev, PCI_MIN_GNT, 1)));
_FDT(fdt_setprop_cell(fdt, offset, "max-latency",
pci_default_read_config(dev, PCI_MAX_LAT, 1)));
}
if (pci_default_read_config(dev, PCI_SUBSYSTEM_ID, 2)) {
_FDT(fdt_setprop_cell(fdt, offset, "subsystem-id",
pci_default_read_config(dev, PCI_SUBSYSTEM_ID, 2)));
}
if (pci_default_read_config(dev, PCI_SUBSYSTEM_VENDOR_ID, 2)) {
_FDT(fdt_setprop_cell(fdt, offset, "subsystem-vendor-id",
pci_default_read_config(dev, PCI_SUBSYSTEM_VENDOR_ID, 2)));
}
_FDT(fdt_setprop_cell(fdt, offset, "cache-line-size",
pci_default_read_config(dev, PCI_CACHE_LINE_SIZE, 1)));
/* the following fdt cells are masked off the pci status register */
pci_status = pci_default_read_config(dev, PCI_STATUS, 2);
_FDT(fdt_setprop_cell(fdt, offset, "devsel-speed",
PCI_STATUS_DEVSEL_MASK & pci_status));
if (pci_status & PCI_STATUS_FAST_BACK) {
_FDT(fdt_setprop(fdt, offset, "fast-back-to-back", NULL, 0));
}
if (pci_status & PCI_STATUS_66MHZ) {
_FDT(fdt_setprop(fdt, offset, "66mhz-capable", NULL, 0));
}
if (pci_status & PCI_STATUS_UDF) {
_FDT(fdt_setprop(fdt, offset, "udf-supported", NULL, 0));
}
_FDT(fdt_setprop_string(fdt, offset, "name",
pci_find_device_name((ccode >> 16) & 0xff,
(ccode >> 8) & 0xff,
ccode & 0xff)));
buf = spapr_phb_get_loc_code(sphb, dev);
_FDT(fdt_setprop_string(fdt, offset, "ibm,loc-code", buf));
g_free(buf);
if (drc_index) {
_FDT(fdt_setprop_cell(fdt, offset, "ibm,my-drc-index", drc_index));
}
_FDT(fdt_setprop_cell(fdt, offset, "#address-cells",
RESOURCE_CELLS_ADDRESS));
_FDT(fdt_setprop_cell(fdt, offset, "#size-cells",
RESOURCE_CELLS_SIZE));
if (msi_present(dev)) {
max_msi = msi_nr_vectors_allocated(dev);
if (max_msi) {
_FDT(fdt_setprop_cell(fdt, offset, "ibm,req#msi", max_msi));
}
}
if (msix_present(dev)) {
max_msix = dev->msix_entries_nr;
if (max_msix) {
_FDT(fdt_setprop_cell(fdt, offset, "ibm,req#msi-x", max_msix));
}
}
populate_resource_props(dev, &rp);
_FDT(fdt_setprop(fdt, offset, "reg", (uint8_t *)rp.reg, rp.reg_len));
_FDT(fdt_setprop(fdt, offset, "assigned-addresses",
(uint8_t *)rp.assigned, rp.assigned_len));
if (sphb->pcie_ecs && pci_is_express(dev)) {
_FDT(fdt_setprop_cell(fdt, offset, "ibm,pci-config-space-type", 0x1));
}
}
/* create OF node for pci device and required OF DT properties */
static int spapr_create_pci_child_dt(sPAPRPHBState *phb, PCIDevice *dev,
void *fdt, int node_offset)
{
int offset;
gchar *nodename;
nodename = pci_get_node_name(dev);
_FDT(offset = fdt_add_subnode(fdt, node_offset, nodename));
g_free(nodename);
spapr_populate_pci_child_dt(dev, fdt, offset, phb);
return offset;
}
/* Callback to be called during DRC release. */
void spapr_phb_remove_pci_device_cb(DeviceState *dev)
{
/* some version guests do not wait for completion of a device
* cleanup (generally done asynchronously by the kernel) before
* signaling to QEMU that the device is safe, but instead sleep
* for some 'safe' period of time. unfortunately on a busy host
* this sleep isn't guaranteed to be long enough, resulting in
* bad things like IRQ lines being left asserted during final
* device removal. to deal with this we call reset just prior
* to finalizing the device, which will put the device back into
* an 'idle' state, as the device cleanup code expects.
*/
pci_device_reset(PCI_DEVICE(dev));
object_unparent(OBJECT(dev));
}
static sPAPRDRConnector *spapr_phb_get_pci_func_drc(sPAPRPHBState *phb,
uint32_t busnr,
int32_t devfn)
{
return spapr_drc_by_id(TYPE_SPAPR_DRC_PCI,
(phb->index << 16) | (busnr << 8) | devfn);
}
static sPAPRDRConnector *spapr_phb_get_pci_drc(sPAPRPHBState *phb,
PCIDevice *pdev)
{
uint32_t busnr = pci_bus_num(PCI_BUS(qdev_get_parent_bus(DEVICE(pdev))));
return spapr_phb_get_pci_func_drc(phb, busnr, pdev->devfn);
}
static uint32_t spapr_phb_get_pci_drc_index(sPAPRPHBState *phb,
PCIDevice *pdev)
{
sPAPRDRConnector *drc = spapr_phb_get_pci_drc(phb, pdev);
if (!drc) {
return 0;
}
return spapr_drc_index(drc);
}
static void spapr_pci_plug(HotplugHandler *plug_handler,
DeviceState *plugged_dev, Error **errp)
{
sPAPRPHBState *phb = SPAPR_PCI_HOST_BRIDGE(DEVICE(plug_handler));
PCIDevice *pdev = PCI_DEVICE(plugged_dev);
sPAPRDRConnector *drc = spapr_phb_get_pci_drc(phb, pdev);
Error *local_err = NULL;
PCIBus *bus = PCI_BUS(qdev_get_parent_bus(DEVICE(pdev)));
uint32_t slotnr = PCI_SLOT(pdev->devfn);
void *fdt = NULL;
int fdt_start_offset, fdt_size;
/* if DR is disabled we don't need to do anything in the case of
* hotplug or coldplug callbacks
*/
if (!phb->dr_enabled) {
/* if this is a hotplug operation initiated by the user
* we need to let them know it's not enabled
*/
if (plugged_dev->hotplugged) {
error_setg(&local_err, QERR_BUS_NO_HOTPLUG,
object_get_typename(OBJECT(phb)));
}
goto out;
}
g_assert(drc);
/* Following the QEMU convention used for PCIe multifunction
* hotplug, we do not allow functions to be hotplugged to a
* slot that already has function 0 present
*/
if (plugged_dev->hotplugged && bus->devices[PCI_DEVFN(slotnr, 0)] &&
PCI_FUNC(pdev->devfn) != 0) {
error_setg(&local_err, "PCI: slot %d function 0 already ocuppied by %s,"
" additional functions can no longer be exposed to guest.",
slotnr, bus->devices[PCI_DEVFN(slotnr, 0)]->name);
goto out;
}
fdt = create_device_tree(&fdt_size);
fdt_start_offset = spapr_create_pci_child_dt(phb, pdev, fdt, 0);
spapr_drc_attach(drc, DEVICE(pdev), fdt, fdt_start_offset, &local_err);
if (local_err) {
goto out;
}
/* If this is function 0, signal hotplug for all the device functions.
* Otherwise defer sending the hotplug event.
*/
if (!spapr_drc_hotplugged(plugged_dev)) {
spapr_drc_reset(drc);
} else if (PCI_FUNC(pdev->devfn) == 0) {
int i;
for (i = 0; i < 8; i++) {
sPAPRDRConnector *func_drc;
sPAPRDRConnectorClass *func_drck;
sPAPRDREntitySense state;
func_drc = spapr_phb_get_pci_func_drc(phb, pci_bus_num(bus),
PCI_DEVFN(slotnr, i));
func_drck = SPAPR_DR_CONNECTOR_GET_CLASS(func_drc);
state = func_drck->dr_entity_sense(func_drc);
if (state == SPAPR_DR_ENTITY_SENSE_PRESENT) {
spapr_hotplug_req_add_by_index(func_drc);
}
}
}
out:
if (local_err) {
error_propagate(errp, local_err);
g_free(fdt);
}
}
static void spapr_pci_unplug_request(HotplugHandler *plug_handler,
DeviceState *plugged_dev, Error **errp)
{
sPAPRPHBState *phb = SPAPR_PCI_HOST_BRIDGE(DEVICE(plug_handler));
PCIDevice *pdev = PCI_DEVICE(plugged_dev);
sPAPRDRConnector *drc = spapr_phb_get_pci_drc(phb, pdev);
if (!phb->dr_enabled) {
error_setg(errp, QERR_BUS_NO_HOTPLUG,
object_get_typename(OBJECT(phb)));
return;
}
g_assert(drc);
g_assert(drc->dev == plugged_dev);
if (!spapr_drc_unplug_requested(drc)) {
PCIBus *bus = PCI_BUS(qdev_get_parent_bus(DEVICE(pdev)));
uint32_t slotnr = PCI_SLOT(pdev->devfn);
sPAPRDRConnector *func_drc;
sPAPRDRConnectorClass *func_drck;
sPAPRDREntitySense state;
int i;
/* ensure any other present functions are pending unplug */
if (PCI_FUNC(pdev->devfn) == 0) {
for (i = 1; i < 8; i++) {
func_drc = spapr_phb_get_pci_func_drc(phb, pci_bus_num(bus),
PCI_DEVFN(slotnr, i));
func_drck = SPAPR_DR_CONNECTOR_GET_CLASS(func_drc);
state = func_drck->dr_entity_sense(func_drc);
if (state == SPAPR_DR_ENTITY_SENSE_PRESENT
&& !spapr_drc_unplug_requested(func_drc)) {
error_setg(errp,
"PCI: slot %d, function %d still present. "
"Must unplug all non-0 functions first.",
slotnr, i);
return;
}
}
}
spapr_drc_detach(drc);
/* if this isn't func 0, defer unplug event. otherwise signal removal
* for all present functions
*/
if (PCI_FUNC(pdev->devfn) == 0) {
for (i = 7; i >= 0; i--) {
func_drc = spapr_phb_get_pci_func_drc(phb, pci_bus_num(bus),
PCI_DEVFN(slotnr, i));
func_drck = SPAPR_DR_CONNECTOR_GET_CLASS(func_drc);
state = func_drck->dr_entity_sense(func_drc);
if (state == SPAPR_DR_ENTITY_SENSE_PRESENT) {
spapr_hotplug_req_remove_by_index(func_drc);
}
}
}
}
}
static void spapr_phb_realize(DeviceState *dev, Error **errp)
{
/* We don't use SPAPR_MACHINE() in order to exit gracefully if the user
* tries to add a sPAPR PHB to a non-pseries machine.
*/
sPAPRMachineState *spapr =
(sPAPRMachineState *) object_dynamic_cast(qdev_get_machine(),
TYPE_SPAPR_MACHINE);
SysBusDevice *s = SYS_BUS_DEVICE(dev);
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(s);
PCIHostState *phb = PCI_HOST_BRIDGE(s);
char *namebuf;
int i;
PCIBus *bus;
uint64_t msi_window_size = 4096;
sPAPRTCETable *tcet;
const unsigned windows_supported =
sphb->ddw_enabled ? SPAPR_PCI_DMA_MAX_WINDOWS : 1;
if (!spapr) {
error_setg(errp, TYPE_SPAPR_PCI_HOST_BRIDGE " needs a pseries machine");
return;
}
if (sphb->index != (uint32_t)-1) {
sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
Error *local_err = NULL;
smc->phb_placement(spapr, sphb->index,
&sphb->buid, &sphb->io_win_addr,
&sphb->mem_win_addr, &sphb->mem64_win_addr,
windows_supported, sphb->dma_liobn, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
} else {
error_setg(errp, "\"index\" for PAPR PHB is mandatory");
return;
}
if (sphb->mem64_win_size != 0) {
if (sphb->mem_win_size > SPAPR_PCI_MEM32_WIN_SIZE) {
error_setg(errp, "32-bit memory window of size 0x%"HWADDR_PRIx
" (max 2 GiB)", sphb->mem_win_size);
return;
}
/* 64-bit window defaults to identity mapping */
sphb->mem64_win_pciaddr = sphb->mem64_win_addr;
} else if (sphb->mem_win_size > SPAPR_PCI_MEM32_WIN_SIZE) {
/*
* For compatibility with old configuration, if no 64-bit MMIO
* window is specified, but the ordinary (32-bit) memory
* window is specified as > 2GiB, we treat it as a 2GiB 32-bit
* window, with a 64-bit MMIO window following on immediately
* afterwards
*/
sphb->mem64_win_size = sphb->mem_win_size - SPAPR_PCI_MEM32_WIN_SIZE;
sphb->mem64_win_addr = sphb->mem_win_addr + SPAPR_PCI_MEM32_WIN_SIZE;
sphb->mem64_win_pciaddr =
SPAPR_PCI_MEM_WIN_BUS_OFFSET + SPAPR_PCI_MEM32_WIN_SIZE;
sphb->mem_win_size = SPAPR_PCI_MEM32_WIN_SIZE;
}
if (spapr_pci_find_phb(spapr, sphb->buid)) {
error_setg(errp, "PCI host bridges must have unique BUIDs");
return;
}
if (sphb->numa_node != -1 &&
(sphb->numa_node >= MAX_NODES || !numa_info[sphb->numa_node].present)) {
error_setg(errp, "Invalid NUMA node ID for PCI host bridge");
return;
}
sphb->dtbusname = g_strdup_printf("pci@%" PRIx64, sphb->buid);
/* Initialize memory regions */
namebuf = g_strdup_printf("%s.mmio", sphb->dtbusname);
memory_region_init(&sphb->memspace, OBJECT(sphb), namebuf, UINT64_MAX);
g_free(namebuf);
namebuf = g_strdup_printf("%s.mmio32-alias", sphb->dtbusname);
memory_region_init_alias(&sphb->mem32window, OBJECT(sphb),
namebuf, &sphb->memspace,
SPAPR_PCI_MEM_WIN_BUS_OFFSET, sphb->mem_win_size);
g_free(namebuf);
memory_region_add_subregion(get_system_memory(), sphb->mem_win_addr,
&sphb->mem32window);
if (sphb->mem64_win_size != 0) {
namebuf = g_strdup_printf("%s.mmio64-alias", sphb->dtbusname);
memory_region_init_alias(&sphb->mem64window, OBJECT(sphb),
namebuf, &sphb->memspace,
sphb->mem64_win_pciaddr, sphb->mem64_win_size);
g_free(namebuf);
memory_region_add_subregion(get_system_memory(),
sphb->mem64_win_addr,
&sphb->mem64window);
}
/* Initialize IO regions */
namebuf = g_strdup_printf("%s.io", sphb->dtbusname);
memory_region_init(&sphb->iospace, OBJECT(sphb),
namebuf, SPAPR_PCI_IO_WIN_SIZE);
g_free(namebuf);
namebuf = g_strdup_printf("%s.io-alias", sphb->dtbusname);
memory_region_init_alias(&sphb->iowindow, OBJECT(sphb), namebuf,
&sphb->iospace, 0, SPAPR_PCI_IO_WIN_SIZE);
g_free(namebuf);
memory_region_add_subregion(get_system_memory(), sphb->io_win_addr,
&sphb->iowindow);
bus = pci_register_root_bus(dev, NULL,
pci_spapr_set_irq, pci_spapr_map_irq, sphb,
&sphb->memspace, &sphb->iospace,
PCI_DEVFN(0, 0), PCI_NUM_PINS, TYPE_PCI_BUS);
phb->bus = bus;
qbus_set_hotplug_handler(BUS(phb->bus), DEVICE(sphb), NULL);
/*
* Initialize PHB address space.
* By default there will be at least one subregion for default
* 32bit DMA window.
* Later the guest might want to create another DMA window
* which will become another memory subregion.
*/
namebuf = g_strdup_printf("%s.iommu-root", sphb->dtbusname);
memory_region_init(&sphb->iommu_root, OBJECT(sphb),
namebuf, UINT64_MAX);
g_free(namebuf);
address_space_init(&sphb->iommu_as, &sphb->iommu_root,
sphb->dtbusname);
/*
* As MSI/MSIX interrupts trigger by writing at MSI/MSIX vectors,
* we need to allocate some memory to catch those writes coming
* from msi_notify()/msix_notify().
* As MSIMessage:addr is going to be the same and MSIMessage:data
* is going to be a VIRQ number, 4 bytes of the MSI MR will only
* be used.
*
* For KVM we want to ensure that this memory is a full page so that
* our memory slot is of page size granularity.
*/
#ifdef CONFIG_KVM
if (kvm_enabled()) {
msi_window_size = getpagesize();
}
#endif
memory_region_init_io(&sphb->msiwindow, OBJECT(sphb), &spapr_msi_ops, spapr,
"msi", msi_window_size);
memory_region_add_subregion(&sphb->iommu_root, SPAPR_PCI_MSI_WINDOW,
&sphb->msiwindow);
pci_setup_iommu(bus, spapr_pci_dma_iommu, sphb);
pci_bus_set_route_irq_fn(bus, spapr_route_intx_pin_to_irq);
QLIST_INSERT_HEAD(&spapr->phbs, sphb, list);
/* Initialize the LSI table */
for (i = 0; i < PCI_NUM_PINS; i++) {
uint32_t irq;
Error *local_err = NULL;
irq = spapr_irq_alloc_block(spapr, 1, true, false, &local_err);
if (local_err) {
error_propagate(errp, local_err);
error_prepend(errp, "can't allocate LSIs: ");
return;
}
sphb->lsi_table[i].irq = irq;
}
/* allocate connectors for child PCI devices */
if (sphb->dr_enabled) {
for (i = 0; i < PCI_SLOT_MAX * 8; i++) {
spapr_dr_connector_new(OBJECT(phb), TYPE_SPAPR_DRC_PCI,
(sphb->index << 16) | i);
}
}
/* DMA setup */
if (((sphb->page_size_mask & qemu_getrampagesize()) == 0)
&& kvm_enabled()) {
warn_report("System page size 0x%lx is not enabled in page_size_mask "
"(0x%"PRIx64"). Performance may be slow",
qemu_getrampagesize(), sphb->page_size_mask);
}
for (i = 0; i < windows_supported; ++i) {
tcet = spapr_tce_new_table(DEVICE(sphb), sphb->dma_liobn[i]);
if (!tcet) {
error_setg(errp, "Creating window#%d failed for %s",
i, sphb->dtbusname);
return;
}
memory_region_add_subregion(&sphb->iommu_root, 0,
spapr_tce_get_iommu(tcet));
}
sphb->msi = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
}
static int spapr_phb_children_reset(Object *child, void *opaque)
{
DeviceState *dev = (DeviceState *) object_dynamic_cast(child, TYPE_DEVICE);
if (dev) {
device_reset(dev);
}
return 0;
}
void spapr_phb_dma_reset(sPAPRPHBState *sphb)
{
int i;
sPAPRTCETable *tcet;
for (i = 0; i < SPAPR_PCI_DMA_MAX_WINDOWS; ++i) {
tcet = spapr_tce_find_by_liobn(sphb->dma_liobn[i]);
if (tcet && tcet->nb_table) {
spapr_tce_table_disable(tcet);
}
}
/* Register default 32bit DMA window */
tcet = spapr_tce_find_by_liobn(sphb->dma_liobn[0]);
spapr_tce_table_enable(tcet, SPAPR_TCE_PAGE_SHIFT, sphb->dma_win_addr,
sphb->dma_win_size >> SPAPR_TCE_PAGE_SHIFT);
}
static void spapr_phb_reset(DeviceState *qdev)
{
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(qdev);
spapr_phb_dma_reset(sphb);
/* Reset the IOMMU state */
object_child_foreach(OBJECT(qdev), spapr_phb_children_reset, NULL);
if (spapr_phb_eeh_available(SPAPR_PCI_HOST_BRIDGE(qdev))) {
spapr_phb_vfio_reset(qdev);
}
}
static Property spapr_phb_properties[] = {
DEFINE_PROP_UINT32("index", sPAPRPHBState, index, -1),
DEFINE_PROP_UINT64("mem_win_size", sPAPRPHBState, mem_win_size,
SPAPR_PCI_MEM32_WIN_SIZE),
DEFINE_PROP_UINT64("mem64_win_size", sPAPRPHBState, mem64_win_size,
SPAPR_PCI_MEM64_WIN_SIZE),
DEFINE_PROP_UINT64("io_win_size", sPAPRPHBState, io_win_size,
SPAPR_PCI_IO_WIN_SIZE),
DEFINE_PROP_BOOL("dynamic-reconfiguration", sPAPRPHBState, dr_enabled,
true),
/* Default DMA window is 0..1GB */
DEFINE_PROP_UINT64("dma_win_addr", sPAPRPHBState, dma_win_addr, 0),
DEFINE_PROP_UINT64("dma_win_size", sPAPRPHBState, dma_win_size, 0x40000000),
DEFINE_PROP_UINT64("dma64_win_addr", sPAPRPHBState, dma64_win_addr,
0x800000000000000ULL),
DEFINE_PROP_BOOL("ddw", sPAPRPHBState, ddw_enabled, true),
DEFINE_PROP_UINT64("pgsz", sPAPRPHBState, page_size_mask,
(1ULL << 12) | (1ULL << 16)),
DEFINE_PROP_UINT32("numa_node", sPAPRPHBState, numa_node, -1),
DEFINE_PROP_BOOL("pre-2.8-migration", sPAPRPHBState,
pre_2_8_migration, false),
DEFINE_PROP_BOOL("pcie-extended-configuration-space", sPAPRPHBState,
pcie_ecs, true),
DEFINE_PROP_END_OF_LIST(),
};
static const VMStateDescription vmstate_spapr_pci_lsi = {
.name = "spapr_pci/lsi",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_EQUAL(irq, struct spapr_pci_lsi, NULL),
VMSTATE_END_OF_LIST()
},
};
static const VMStateDescription vmstate_spapr_pci_msi = {
.name = "spapr_pci/msi",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField []) {
VMSTATE_UINT32(key, spapr_pci_msi_mig),
VMSTATE_UINT32(value.first_irq, spapr_pci_msi_mig),
VMSTATE_UINT32(value.num, spapr_pci_msi_mig),
VMSTATE_END_OF_LIST()
},
};
static int spapr_pci_pre_save(void *opaque)
{
sPAPRPHBState *sphb = opaque;
GHashTableIter iter;
gpointer key, value;
int i;
if (sphb->pre_2_8_migration) {
sphb->mig_liobn = sphb->dma_liobn[0];
sphb->mig_mem_win_addr = sphb->mem_win_addr;
sphb->mig_mem_win_size = sphb->mem_win_size;
sphb->mig_io_win_addr = sphb->io_win_addr;
sphb->mig_io_win_size = sphb->io_win_size;
if ((sphb->mem64_win_size != 0)
&& (sphb->mem64_win_addr
== (sphb->mem_win_addr + sphb->mem_win_size))) {
sphb->mig_mem_win_size += sphb->mem64_win_size;
}
}
g_free(sphb->msi_devs);
sphb->msi_devs = NULL;
sphb->msi_devs_num = g_hash_table_size(sphb->msi);
if (!sphb->msi_devs_num) {
return 0;
}
sphb->msi_devs = g_malloc(sphb->msi_devs_num * sizeof(spapr_pci_msi_mig));
g_hash_table_iter_init(&iter, sphb->msi);
for (i = 0; g_hash_table_iter_next(&iter, &key, &value); ++i) {
sphb->msi_devs[i].key = *(uint32_t *) key;
sphb->msi_devs[i].value = *(spapr_pci_msi *) value;
}
return 0;
}
static int spapr_pci_post_load(void *opaque, int version_id)
{
sPAPRPHBState *sphb = opaque;
gpointer key, value;
int i;
for (i = 0; i < sphb->msi_devs_num; ++i) {
key = g_memdup(&sphb->msi_devs[i].key,
sizeof(sphb->msi_devs[i].key));
value = g_memdup(&sphb->msi_devs[i].value,
sizeof(sphb->msi_devs[i].value));
g_hash_table_insert(sphb->msi, key, value);
}
g_free(sphb->msi_devs);
sphb->msi_devs = NULL;
sphb->msi_devs_num = 0;
return 0;
}
static bool pre_2_8_migration(void *opaque, int version_id)
{
sPAPRPHBState *sphb = opaque;
return sphb->pre_2_8_migration;
}
static const VMStateDescription vmstate_spapr_pci = {
.name = "spapr_pci",
.version_id = 2,
.minimum_version_id = 2,
.pre_save = spapr_pci_pre_save,
.post_load = spapr_pci_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT64_EQUAL(buid, sPAPRPHBState, NULL),
VMSTATE_UINT32_TEST(mig_liobn, sPAPRPHBState, pre_2_8_migration),
VMSTATE_UINT64_TEST(mig_mem_win_addr, sPAPRPHBState, pre_2_8_migration),
VMSTATE_UINT64_TEST(mig_mem_win_size, sPAPRPHBState, pre_2_8_migration),
VMSTATE_UINT64_TEST(mig_io_win_addr, sPAPRPHBState, pre_2_8_migration),
VMSTATE_UINT64_TEST(mig_io_win_size, sPAPRPHBState, pre_2_8_migration),
VMSTATE_STRUCT_ARRAY(lsi_table, sPAPRPHBState, PCI_NUM_PINS, 0,
vmstate_spapr_pci_lsi, struct spapr_pci_lsi),
VMSTATE_INT32(msi_devs_num, sPAPRPHBState),
VMSTATE_STRUCT_VARRAY_ALLOC(msi_devs, sPAPRPHBState, msi_devs_num, 0,
vmstate_spapr_pci_msi, spapr_pci_msi_mig),
VMSTATE_END_OF_LIST()
},
};
static const char *spapr_phb_root_bus_path(PCIHostState *host_bridge,
PCIBus *rootbus)
{
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(host_bridge);
return sphb->dtbusname;
}
static void spapr_phb_class_init(ObjectClass *klass, void *data)
{
PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
HotplugHandlerClass *hp = HOTPLUG_HANDLER_CLASS(klass);
hc->root_bus_path = spapr_phb_root_bus_path;
dc->realize = spapr_phb_realize;
dc->props = spapr_phb_properties;
dc->reset = spapr_phb_reset;
dc->vmsd = &vmstate_spapr_pci;
/* Supported by TYPE_SPAPR_MACHINE */
dc->user_creatable = true;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
hp->plug = spapr_pci_plug;
hp->unplug_request = spapr_pci_unplug_request;
}
static const TypeInfo spapr_phb_info = {
.name = TYPE_SPAPR_PCI_HOST_BRIDGE,
.parent = TYPE_PCI_HOST_BRIDGE,
.instance_size = sizeof(sPAPRPHBState),
.class_init = spapr_phb_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_HOTPLUG_HANDLER },
{ }
}
};
PCIHostState *spapr_create_phb(sPAPRMachineState *spapr, int index)
{
DeviceState *dev;
dev = qdev_create(NULL, TYPE_SPAPR_PCI_HOST_BRIDGE);
qdev_prop_set_uint32(dev, "index", index);
qdev_init_nofail(dev);
return PCI_HOST_BRIDGE(dev);
}
typedef struct sPAPRFDT {
void *fdt;
int node_off;
sPAPRPHBState *sphb;
} sPAPRFDT;
static void spapr_populate_pci_devices_dt(PCIBus *bus, PCIDevice *pdev,
void *opaque)
{
PCIBus *sec_bus;
sPAPRFDT *p = opaque;
int offset;
sPAPRFDT s_fdt;
offset = spapr_create_pci_child_dt(p->sphb, pdev, p->fdt, p->node_off);
if (!offset) {
error_report("Failed to create pci child device tree node");
return;
}
if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) !=
PCI_HEADER_TYPE_BRIDGE)) {
return;
}
sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
if (!sec_bus) {
return;
}
s_fdt.fdt = p->fdt;
s_fdt.node_off = offset;
s_fdt.sphb = p->sphb;
pci_for_each_device_reverse(sec_bus, pci_bus_num(sec_bus),
spapr_populate_pci_devices_dt,
&s_fdt);
}
static void spapr_phb_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev,
void *opaque)
{
unsigned int *bus_no = opaque;
unsigned int primary = *bus_no;
unsigned int subordinate = 0xff;
PCIBus *sec_bus = NULL;
if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) !=
PCI_HEADER_TYPE_BRIDGE)) {
return;
}
(*bus_no)++;
pci_default_write_config(pdev, PCI_PRIMARY_BUS, primary, 1);
pci_default_write_config(pdev, PCI_SECONDARY_BUS, *bus_no, 1);
pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, *bus_no, 1);
sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
if (!sec_bus) {
return;
}
pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, subordinate, 1);
pci_for_each_device(sec_bus, pci_bus_num(sec_bus),
spapr_phb_pci_enumerate_bridge, bus_no);
pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, *bus_no, 1);
}
static void spapr_phb_pci_enumerate(sPAPRPHBState *phb)
{
PCIBus *bus = PCI_HOST_BRIDGE(phb)->bus;
unsigned int bus_no = 0;
pci_for_each_device(bus, pci_bus_num(bus),
spapr_phb_pci_enumerate_bridge,
&bus_no);
}
int spapr_populate_pci_dt(sPAPRPHBState *phb,
uint32_t xics_phandle,
void *fdt)
{
int bus_off, i, j, ret;
gchar *nodename;
uint32_t bus_range[] = { cpu_to_be32(0), cpu_to_be32(0xff) };
struct {
uint32_t hi;
uint64_t child;
uint64_t parent;
uint64_t size;
} QEMU_PACKED ranges[] = {
{
cpu_to_be32(b_ss(1)), cpu_to_be64(0),
cpu_to_be64(phb->io_win_addr),
cpu_to_be64(memory_region_size(&phb->iospace)),
},
{
cpu_to_be32(b_ss(2)), cpu_to_be64(SPAPR_PCI_MEM_WIN_BUS_OFFSET),
cpu_to_be64(phb->mem_win_addr),
cpu_to_be64(phb->mem_win_size),
},
{
cpu_to_be32(b_ss(3)), cpu_to_be64(phb->mem64_win_pciaddr),
cpu_to_be64(phb->mem64_win_addr),
cpu_to_be64(phb->mem64_win_size),
},
};
const unsigned sizeof_ranges =
(phb->mem64_win_size ? 3 : 2) * sizeof(ranges[0]);
uint64_t bus_reg[] = { cpu_to_be64(phb->buid), 0 };
uint32_t interrupt_map_mask[] = {
cpu_to_be32(b_ddddd(-1)|b_fff(0)), 0x0, 0x0, cpu_to_be32(-1)};
uint32_t interrupt_map[PCI_SLOT_MAX * PCI_NUM_PINS][7];
uint32_t ddw_applicable[] = {
cpu_to_be32(RTAS_IBM_QUERY_PE_DMA_WINDOW),
cpu_to_be32(RTAS_IBM_CREATE_PE_DMA_WINDOW),
cpu_to_be32(RTAS_IBM_REMOVE_PE_DMA_WINDOW)
};
uint32_t ddw_extensions[] = {
cpu_to_be32(1),
cpu_to_be32(RTAS_IBM_RESET_PE_DMA_WINDOW)
};
uint32_t associativity[] = {cpu_to_be32(0x4),
cpu_to_be32(0x0),
cpu_to_be32(0x0),
cpu_to_be32(0x0),
cpu_to_be32(phb->numa_node)};
sPAPRTCETable *tcet;
PCIBus *bus = PCI_HOST_BRIDGE(phb)->bus;
sPAPRFDT s_fdt;
/* Start populating the FDT */
nodename = g_strdup_printf("pci@%" PRIx64, phb->buid);
_FDT(bus_off = fdt_add_subnode(fdt, 0, nodename));
g_free(nodename);
/* Write PHB properties */
_FDT(fdt_setprop_string(fdt, bus_off, "device_type", "pci"));
_FDT(fdt_setprop_string(fdt, bus_off, "compatible", "IBM,Logical_PHB"));
_FDT(fdt_setprop_cell(fdt, bus_off, "#address-cells", 0x3));
_FDT(fdt_setprop_cell(fdt, bus_off, "#size-cells", 0x2));
_FDT(fdt_setprop_cell(fdt, bus_off, "#interrupt-cells", 0x1));
_FDT(fdt_setprop(fdt, bus_off, "used-by-rtas", NULL, 0));
_FDT(fdt_setprop(fdt, bus_off, "bus-range", &bus_range, sizeof(bus_range)));
_FDT(fdt_setprop(fdt, bus_off, "ranges", &ranges, sizeof_ranges));
_FDT(fdt_setprop(fdt, bus_off, "reg", &bus_reg, sizeof(bus_reg)));
_FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pci-config-space-type", 0x1));
_FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pe-total-#msi", XICS_IRQS_SPAPR));
/* Dynamic DMA window */
if (phb->ddw_enabled) {
_FDT(fdt_setprop(fdt, bus_off, "ibm,ddw-applicable", &ddw_applicable,
sizeof(ddw_applicable)));
_FDT(fdt_setprop(fdt, bus_off, "ibm,ddw-extensions",
&ddw_extensions, sizeof(ddw_extensions)));
}
/* Advertise NUMA via ibm,associativity */
if (phb->numa_node != -1) {
_FDT(fdt_setprop(fdt, bus_off, "ibm,associativity", associativity,
sizeof(associativity)));
}
/* Build the interrupt-map, this must matches what is done
* in pci_spapr_map_irq
*/
_FDT(fdt_setprop(fdt, bus_off, "interrupt-map-mask",
&interrupt_map_mask, sizeof(interrupt_map_mask)));
for (i = 0; i < PCI_SLOT_MAX; i++) {
for (j = 0; j < PCI_NUM_PINS; j++) {
uint32_t *irqmap = interrupt_map[i*PCI_NUM_PINS + j];
int lsi_num = pci_spapr_swizzle(i, j);
irqmap[0] = cpu_to_be32(b_ddddd(i)|b_fff(0));
irqmap[1] = 0;
irqmap[2] = 0;
irqmap[3] = cpu_to_be32(j+1);
irqmap[4] = cpu_to_be32(xics_phandle);
spapr_dt_xics_irq(&irqmap[5], phb->lsi_table[lsi_num].irq, true);
}
}
/* Write interrupt map */
_FDT(fdt_setprop(fdt, bus_off, "interrupt-map", &interrupt_map,
sizeof(interrupt_map)));
tcet = spapr_tce_find_by_liobn(phb->dma_liobn[0]);
if (!tcet) {
return -1;
}
spapr_dma_dt(fdt, bus_off, "ibm,dma-window",
tcet->liobn, tcet->bus_offset,
tcet->nb_table << tcet->page_shift);
/* Walk the bridges and program the bus numbers*/
spapr_phb_pci_enumerate(phb);
_FDT(fdt_setprop_cell(fdt, bus_off, "qemu,phb-enumerated", 0x1));
/* Populate tree nodes with PCI devices attached */
s_fdt.fdt = fdt;
s_fdt.node_off = bus_off;
s_fdt.sphb = phb;
pci_for_each_device_reverse(bus, pci_bus_num(bus),
spapr_populate_pci_devices_dt,
&s_fdt);
ret = spapr_drc_populate_dt(fdt, bus_off, OBJECT(phb),
SPAPR_DR_CONNECTOR_TYPE_PCI);
if (ret) {
return ret;
}
return 0;
}
void spapr_pci_rtas_init(void)
{
spapr_rtas_register(RTAS_READ_PCI_CONFIG, "read-pci-config",
rtas_read_pci_config);
spapr_rtas_register(RTAS_WRITE_PCI_CONFIG, "write-pci-config",
rtas_write_pci_config);
spapr_rtas_register(RTAS_IBM_READ_PCI_CONFIG, "ibm,read-pci-config",
rtas_ibm_read_pci_config);
spapr_rtas_register(RTAS_IBM_WRITE_PCI_CONFIG, "ibm,write-pci-config",
rtas_ibm_write_pci_config);
if (msi_nonbroken) {
spapr_rtas_register(RTAS_IBM_QUERY_INTERRUPT_SOURCE_NUMBER,
"ibm,query-interrupt-source-number",
rtas_ibm_query_interrupt_source_number);
spapr_rtas_register(RTAS_IBM_CHANGE_MSI, "ibm,change-msi",
rtas_ibm_change_msi);
}
spapr_rtas_register(RTAS_IBM_SET_EEH_OPTION,
"ibm,set-eeh-option",
rtas_ibm_set_eeh_option);
spapr_rtas_register(RTAS_IBM_GET_CONFIG_ADDR_INFO2,
"ibm,get-config-addr-info2",
rtas_ibm_get_config_addr_info2);
spapr_rtas_register(RTAS_IBM_READ_SLOT_RESET_STATE2,
"ibm,read-slot-reset-state2",
rtas_ibm_read_slot_reset_state2);
spapr_rtas_register(RTAS_IBM_SET_SLOT_RESET,
"ibm,set-slot-reset",
rtas_ibm_set_slot_reset);
spapr_rtas_register(RTAS_IBM_CONFIGURE_PE,
"ibm,configure-pe",
rtas_ibm_configure_pe);
spapr_rtas_register(RTAS_IBM_SLOT_ERROR_DETAIL,
"ibm,slot-error-detail",
rtas_ibm_slot_error_detail);
}
static void spapr_pci_register_types(void)
{
type_register_static(&spapr_phb_info);
}
type_init(spapr_pci_register_types)
static int spapr_switch_one_vga(DeviceState *dev, void *opaque)
{
bool be = *(bool *)opaque;
if (object_dynamic_cast(OBJECT(dev), "VGA")
|| object_dynamic_cast(OBJECT(dev), "secondary-vga")) {
object_property_set_bool(OBJECT(dev), be, "big-endian-framebuffer",
&error_abort);
}
return 0;
}
void spapr_pci_switch_vga(bool big_endian)
{
sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
sPAPRPHBState *sphb;
/*
* For backward compatibility with existing guests, we switch
* the endianness of the VGA controller when changing the guest
* interrupt mode
*/
QLIST_FOREACH(sphb, &spapr->phbs, list) {
BusState *bus = &PCI_HOST_BRIDGE(sphb)->bus->qbus;
qbus_walk_children(bus, spapr_switch_one_vga, NULL, NULL, NULL,
&big_endian);
}
}
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