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Multiple - even many - PCI host bridges (i.e. PCI domains) are very common on real PAPR compliant hardware. For reasons related to the PAPR specified IOMMU interfaces, PCI device assignment with VFIO will generally require at least two (virtual) PHBs and possibly more depending on which devices are assigned. At the moment the qemu PAPR PCI code will not deal with this well, leaving several crucial parameters of PHBs other than the default one uninitialized. This patch reworks the code to allow this. Every PHB needs a unique BUID (Bus Unit Identifier, the id used for the PAPR PCI related interfaces) and a unique LIOBN (Logical IO Bus Number, the id used for the PAPR IOMMU related interfaces). In addition they need windows in CPU real address space to access PCI memory space, PCI IO space and MSIs. Properties are added to the PCI host bridge qdevice to allow configuration of all these. To simplify configuration of multiple PHBs for common cases, a convenience "index" property is also added. This can be set instead of the low-level properties, and will generate suitable values for the other parameters, different for each index value. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*
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* QEMU SPAPR PCI BUS definitions
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*
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* Copyright (c) 2011 Alexey Kardashevskiy <aik@au1.ibm.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(__HW_SPAPR_H__)
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#error Please include spapr.h before this file!
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#endif
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#if !defined(__HW_SPAPR_PCI_H__)
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#define __HW_SPAPR_PCI_H__
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#include "hw/pci/pci.h"
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#include "hw/pci/pci_host.h"
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#include "hw/xics.h"
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#define SPAPR_MSIX_MAX_DEVS 32
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#define TYPE_SPAPR_PCI_HOST_BRIDGE "spapr-pci-host-bridge"
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#define SPAPR_PCI_HOST_BRIDGE(obj) \
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OBJECT_CHECK(sPAPRPHBState, (obj), TYPE_SPAPR_PCI_HOST_BRIDGE)
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typedef struct sPAPRPHBState {
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PCIHostState parent_obj;
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int32_t index;
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uint64_t buid;
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char *busname;
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char *dtbusname;
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MemoryRegion memspace, iospace;
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hwaddr mem_win_addr, mem_win_size, io_win_addr, io_win_size;
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hwaddr msi_win_addr;
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MemoryRegion memwindow, iowindow, msiwindow;
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uint32_t dma_liobn;
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uint64_t dma_window_start;
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uint64_t dma_window_size;
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DMAContext *dma;
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struct {
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uint32_t irq;
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} lsi_table[PCI_NUM_PINS];
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struct {
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uint32_t config_addr;
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uint32_t irq;
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int nvec;
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} msi_table[SPAPR_MSIX_MAX_DEVS];
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QLIST_ENTRY(sPAPRPHBState) list;
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} sPAPRPHBState;
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#define SPAPR_PCI_BASE_BUID 0x800000020000000ULL
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#define SPAPR_PCI_WINDOW_BASE 0x10000000000ULL
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#define SPAPR_PCI_WINDOW_SPACING 0x1000000000ULL
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#define SPAPR_PCI_MMIO_WIN_OFF 0xA0000000
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#define SPAPR_PCI_MMIO_WIN_SIZE 0x20000000
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#define SPAPR_PCI_IO_WIN_OFF 0x80000000
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#define SPAPR_PCI_IO_WIN_SIZE 0x10000
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#define SPAPR_PCI_MSI_WIN_OFF 0x90000000
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#define SPAPR_PCI_MEM_WIN_BUS_OFFSET 0x80000000ULL
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static inline qemu_irq spapr_phb_lsi_qirq(struct sPAPRPHBState *phb, int pin)
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{
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return xics_get_qirq(spapr->icp, phb->lsi_table[pin].irq);
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}
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PCIHostState *spapr_create_phb(sPAPREnvironment *spapr, int index,
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const char *busname);
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int spapr_populate_pci_dt(sPAPRPHBState *phb,
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uint32_t xics_phandle,
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void *fdt);
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void spapr_pci_rtas_init(void);
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#endif /* __HW_SPAPR_PCI_H__ */
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