/*
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1994 Charles M. Hannum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles M. Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* x86-specific PCI structure and type definitions.
* NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
*
* Configuration tag; created from a {bus,device,function} triplet by
* pci_make_tag(), and passed to pci_conf_read() and pci_conf_write().
* We could instead always pass the {bus,device,function} triplet to
* the read and write routines, but this would cause extra overhead.
*
* Mode 2 is historical and deprecated by the Revision 2.0 specification.
*
*
* Mode 1 tag:
* 31 24 16 15 11 10 8
* +---------------------------------------------------------------+
* |1| 0 | BUS | DEV |FUNC | 0 |
* +---------------------------------------------------------------+
*/
union x86_pci_tag_u {
uint32_t mode1;
struct {
uint16_t port;
uint8_t enable;
uint8_t forward;
} mode2;
};
/*
* x86-specific PCI variables and functions.
* NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
*/
int pci_mode_detect(void);
void pci_mode_set(int);
pci_intr_type_t pci_intr_type(pci_chipset_tag_t, pci_intr_handle_t);
/*
* Wrapper function for generally unitied allocation to fallback MSI-X/MSI/INTx
* automatically.
*/
int pci_intr_alloc(const struct pci_attach_args *,
pci_intr_handle_t **, int *, pci_intr_type_t);
void pci_intr_release(pci_chipset_tag_t, pci_intr_handle_t *,
int);
#endif
/*
* If device drivers use MSI/MSI-X, they should use these API for INTx
* instead of pci_intr_map(), because of conforming the pci_intr_handle
* ownership to MSI/MSI-X.
*/
int pci_intx_alloc(const struct pci_attach_args *,
pci_intr_handle_t **);
/* experimental MSI support */
int pci_msi_alloc(const struct pci_attach_args *,
pci_intr_handle_t **, int *);
int pci_msi_alloc_exact(const struct pci_attach_args *,
pci_intr_handle_t **, int);
/* experimental MSI-X support */
int pci_msix_alloc(const struct pci_attach_args *,
pci_intr_handle_t **, int *);
int pci_msix_alloc_exact(const struct pci_attach_args *,
pci_intr_handle_t **, int);
int pci_msix_alloc_map(const struct pci_attach_args *,
pci_intr_handle_t **, u_int *, int);
/*
* ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED
* BY PORTABLE CODE.
*/
/* Extract Bus Number for a host bridge or -1 if unknown. */
int pchb_get_bus_number(pci_chipset_tag_t, pcitag_t);
/*
* Section 6.2.4, `Miscellaneous Functions' of the PCI Specification,
* says that 255 means `unknown' or `no connection' to the interrupt
* controller on a PC.
*/
#define X86_PCI_INTERRUPT_LINE_NO_CONNECTION 0xff
