hw/msi.h

   1 /*
   2  * msi.h
   3  *
   4  * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
   5  *                    VA Linux Systems Japan K.K.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #ifndef QEMU_MSI_H
  22 #define QEMU_MSI_H
  23
  24 #include "qemu-common.h"
  25 #include "pci.h"
  26
  27 struct MSIMessage {
  28     uint64_t address;
  29     uint32_t data;
  30 };
  31
  32 extern bool msi_supported;
  33
  34 bool msi_enabled(const PCIDevice *dev);
  35 int msi_init(struct PCIDevice *dev, uint8_t offset,
  36              unsigned int nr_vectors, bool msi64bit, bool msi_per_vector_mask);
  37 void msi_uninit(struct PCIDevice *dev);
  38 void msi_reset(PCIDevice *dev);
  39 void msi_notify(PCIDevice *dev, unsigned int vector);
  40 void msi_write_config(PCIDevice *dev, uint32_t addr, uint32_t val, int len);
  41 unsigned int msi_nr_vectors_allocated(const PCIDevice *dev);
  42
  43 static inline bool msi_present(const PCIDevice *dev)
  44 {
  45     return dev->cap_present & QEMU_PCI_CAP_MSI;
  46 }
  47
  48 #endif /* QEMU_MSI_H */