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/**************************************************************************
**
** $Id: pcivar.h,v 1.10 1996/03/19 15:02:58 bde Exp $
**
** Declarations for pci device drivers.
**
** FreeBSD
**
**-------------------------------------------------------------------------
**
** Copyright (c) 1994 Wolfgang Stanglmeier. 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. 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.
**
***************************************************************************
*/
#ifndef __PCI_VAR_H__
#define __PCI_VAR_H__ "pl2 95/03/21"
/*-----------------------------------------------------------------
**
** main pci initialization function.
** called at boot time from autoconf.c
**
**-----------------------------------------------------------------
*/
void pci_configure (void);
/*-----------------------------------------------------------------
**
** The pci configuration id describes a pci device on the bus.
** It is constructed from: bus, device & function numbers.
**
**-----------------------------------------------------------------
*/
typedef union {
u_long cfg1;
struct {
u_char enable;
u_char forward;
u_short port;
} cfg2;
unsigned tag;
} pcici_t;
#define sametag(x,y) ((x).tag == (y).tag)
/*-----------------------------------------------------------------
**
** Each pci device has an unique device id.
** It is used to find a matching driver.
**
**-----------------------------------------------------------------
*/
typedef u_long pcidi_t;
/*-----------------------------------------------------------------
**
** The following functions are provided for the device driver
** to read/write the configuration space.
**
** pci_conf_read():
** Read a long word from the pci configuration space.
** Requires a tag (from pcitag) and the register
** number (should be a long word alligned one).
**
** pci_conf_write():
** Writes a long word to the pci configuration space.
** Requires a tag (from pcitag), the register number
** (should be a long word alligned one), and a value.
**
**-----------------------------------------------------------------
*/
u_long pci_conf_read (pcici_t tag, u_long reg );
void pci_conf_write (pcici_t tag, u_long reg, u_long data);
/*-----------------------------------------------------------------
**
** The pci driver structure.
**
** name: The short device name.
**
** probe: Checks if the driver can support a device
** with this type. The tag may be used to get
** more info with pci_read_conf(). See below.
** It returns a string with the devices name,
** or a NULL pointer, if the driver cannot
** support this device.
**
** attach: Allocate a control structure and prepare
** it. This function may use the pci mapping
** functions. See below.
** (configuration id) or type.
**
** count: A pointer to a unit counter.
** It's used by the pci configurator to
** allocate unit numbers.
**
**-----------------------------------------------------------------
*/
struct kern_devconf;
struct pci_device {
char* pd_name;
char* (*pd_probe ) (pcici_t tag, pcidi_t type);
void (*pd_attach) (pcici_t tag, int unit);
u_long *pd_count;
int (*pd_shutdown) (int, int);
};
/*-----------------------------------------------------------------
**
** This table includes pointers to all pci device drivers.
** It should be generated by the linker.
**
**-----------------------------------------------------------------
*/
extern struct linker_set pcidevice_set;
extern unsigned pci_max_burst_len; /* log2 of safe burst transfer length */
extern unsigned pci_mechanism;
extern unsigned pci_maxdevice;
/*-----------------------------------------------------------------
**
** The pci-devconf interface.
**
**-----------------------------------------------------------------
*/
struct pci_info {
u_char pi_bus;
u_char pi_device;
u_char pi_func;
u_char pi_dummy;
u_char pi_unit;
};
#define PCI_EXT_CONF_LEN (16)
#define PCI_EXTERNAL_LEN (sizeof(struct pci_externalize_buffer))
struct pci_externalize_buffer {
struct pci_info peb_pci_info;
u_long peb_config[PCI_EXT_CONF_LEN];
};
/*-----------------------------------------------------------------
**
** Map a pci device to physical and virtual memory.
**
** Entry selects the register in the pci configuration
** space, which supplies the size of the region, and
** receives the physical address.
**
** In case of success the function sets the addresses
** in *va and *pa, and returns 1.
** In case of errors a message is written,
** and the function returns 0.
**
**-----------------------------------------------------------------
*/
int pci_map_mem (pcici_t tag, u_long entry, vm_offset_t *va, vm_offset_t *pa);
/*-----------------------------------------------------------------
**
** Map a pci device to an io port area.
**
** Entry selects the register in the pci configuration
** space, which supplies the size of the region, and
** receives the port number.
**
** In case of success the function sets the port number in pa,
** and returns 1.
** In case of errors a message is written,
** and the function returns 0.
**
**-----------------------------------------------------------------
*/
int pci_map_port (pcici_t tag, u_long entry, u_short * pa);
/*-----------------------------------------------------------------
**
** Map a pci interrupt to an isa irq line, and enable the interrupt.
**
** -----------------
**
** func is the interrupt handler, arg is the argument
** to the handler (usually a pointer to a softc).
**
** The maskptr argument should be &bio_imask,
** &net_imask etc. or NULL.
**
** If there is any error, a message is written, and
** the function returns with zero.
** Else it returns with a value different to zero.
**
** -----------------
**
** The irq number is read from the configuration space.
** (Should have been set by the bios).
**
** Supports multiple handlers per irq (shared interrupts).
**
**-----------------------------------------------------------------
*/
typedef void pci_inthand_t(void *arg);
struct pci_int_desc {
struct pci_int_desc * pcid_next;
pcici_t pcid_tag;
pci_inthand_t *pcid_handler;
void* pcid_argument;
unsigned * pcid_maskptr;
unsigned pcid_tally;
unsigned pcid_mask;
};
int pci_map_int (pcici_t tag, pci_inthand_t *func, void *arg,
unsigned *maskptr);
int pci_unmap_int (pcici_t tag);
#endif
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