f86233fe54
wider variety of systems. Include the deivers from pci_intel.c in pci_config.c (I hope this is what was intended; my system works ok). Use pmap_mapdev(). Automatically map any large linear frame buffers or whatnot in VGA-style devices which ordinarily would not have their own drivers, and don't call not_supported() for them. (This shuts up complaints about my Matrox card.) Include the beginnings of what could eventually become dynamically-loadable PCI devices. Allow for the possibility of PCI devices simply providing a PCI veneer over an existing ISA device, and shut up about them, too. Make autoconfiguration text conform more to the style of other supported buses.
621 lines
14 KiB
C
621 lines
14 KiB
C
/**************************************************************************
|
||
**
|
||
** $Id: pci.c,v 1.2 1994/09/01 02:01:34 se Exp $
|
||
**
|
||
** General subroutines for the PCI bus on 80*86 systems.
|
||
** pci_configure ()
|
||
**
|
||
** 386bsd / 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.
|
||
**
|
||
**-------------------------------------------------------------------------
|
||
**
|
||
** $Log: pci.c,v $
|
||
* Revision 1.2 1994/09/01 02:01:34 se
|
||
* Submitted by: Wolfgang Stanglmeier <wolf@dentaro.GUN.de>
|
||
* Merged in changes required for NetBSD support (by mycroft@gnu.ai.mit.edu)
|
||
* and support for multiple NCR chips.
|
||
*
|
||
** Revision 2.0.0.8 94/08/21 19:57:39 wolf
|
||
** Unneeded declarations removed (FreeBSD2.0)
|
||
**
|
||
** Revision 2.0.0.7 94/08/21 19:25:54 wolf
|
||
** pci_intr simplified.
|
||
** new not_supported() function.
|
||
** Vendor and device ids moved into tables.
|
||
**
|
||
** Revision 2.0.0.6 94/08/18 22:58:23 wolf
|
||
** Symbolic names for pci configuration space registers.
|
||
** last_device: from configuration mode
|
||
** last_bus: from pcibios.
|
||
** PCI_MAX_DPI: changed to 4 (settable by config)
|
||
** interrupt configuration by line or pin
|
||
**
|
||
** Revision 2.0.0.5 94/08/11 19:04:10 wolf
|
||
** display of interrupt line configuration register.
|
||
**
|
||
** Revision 2.0.0.4 94/08/01 20:36:28 wolf
|
||
** Tiny clean up.
|
||
**
|
||
** Revision 2.0.0.3 94/08/01 18:52:33 wolf
|
||
** New vendor entry: S3.
|
||
** Scan pci busses #0..#255 as default.
|
||
** Number of scanned busses and devices settable as option.
|
||
** Show these numbers before starting the scan.
|
||
**
|
||
** Revision 2.0.0.2 94/07/27 09:27:19 wolf
|
||
** New option PCI_QUIET: suppress log messages.
|
||
**
|
||
** Revision 2.0.0.1 94/07/19 19:06:44 wolf
|
||
** New vendor entry: MATROX
|
||
**
|
||
** Revision 2.0 94/07/10 15:53:29 wolf
|
||
** FreeBSD release.
|
||
**
|
||
** Revision 1.0 94/06/07 20:02:19 wolf
|
||
** Beta release.
|
||
**
|
||
***************************************************************************
|
||
*/
|
||
|
||
#include <pci.h>
|
||
#if NPCI > 0
|
||
|
||
/*========================================================
|
||
**
|
||
** Configuration
|
||
**
|
||
**========================================================
|
||
*/
|
||
|
||
/*
|
||
** maximum number of devices which share one interrupt line
|
||
*/
|
||
|
||
#ifndef PCI_MAX_DPI
|
||
#define PCI_MAX_DPI (4)
|
||
#endif /*PCI_MAX_DPI*/
|
||
|
||
|
||
/*========================================================
|
||
**
|
||
** #includes and declarations
|
||
**
|
||
**========================================================
|
||
*/
|
||
|
||
#include <sys/param.h>
|
||
#include <sys/systm.h>
|
||
#include <sys/errno.h>
|
||
|
||
#include <vm/vm.h>
|
||
#include <vm/vm_param.h>
|
||
|
||
#include <i386/isa/icu.h>
|
||
#include <i386/isa/isa.h>
|
||
#include <i386/isa/isa_device.h>
|
||
|
||
#include <i386/pci/pci.h>
|
||
#include <i386/pci/pci_device.h>
|
||
#include <i386/pci/pcibios.h>
|
||
|
||
|
||
char ident_pci_c[] =
|
||
"\n$Id: pci.c,v 1.2 1994/09/01 02:01:34 se Exp $\n"
|
||
"Copyright (c) 1994, Wolfgang Stanglmeier\n";
|
||
|
||
/*
|
||
** Function prototypes missing in system headers
|
||
*/
|
||
|
||
#if ! (__FreeBSD__ >= 2)
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||
extern pmap_t pmap_kernel(void);
|
||
#endif
|
||
|
||
|
||
/*========================================================
|
||
**
|
||
** Autoconfiguration (of isa bus)
|
||
**
|
||
**========================================================
|
||
*/
|
||
|
||
/*
|
||
** per device (interrupt) data structure.
|
||
*/
|
||
|
||
static struct {
|
||
u_short number;
|
||
u_short isanum;
|
||
struct {
|
||
int (*proc)(int dev);
|
||
dev_t unit;
|
||
} vector[PCI_MAX_DPI];
|
||
} pcidata [NPCI];
|
||
|
||
/*
|
||
** check device ready
|
||
*/
|
||
static int pciprobe (struct isa_device *dev)
|
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{
|
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if (dev->id_unit >= NPCI)
|
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return (0);
|
||
|
||
if (!pci_conf_mode())
|
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return (0);
|
||
|
||
return (-1);
|
||
}
|
||
|
||
/*
|
||
** initialize the driver structure
|
||
*/
|
||
static int pciattach (struct isa_device *isdp)
|
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{
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pcidata[isdp->id_unit].number = 0;
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pcidata[isdp->id_unit].isanum = ffs(isdp->id_irq)-1;
|
||
return (1);
|
||
}
|
||
|
||
/*
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||
** ISA driver structure
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||
*/
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struct isa_driver pcidriver = {
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pciprobe,
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pciattach,
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"pci"
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};
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|
||
/*========================================================
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||
**
|
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** Interrupt forward from isa to pci devices.
|
||
**
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||
**========================================================
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*/
|
||
|
||
|
||
void pciintr (int unit)
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||
{
|
||
u_short i;
|
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if (unit >= NPCI) return;
|
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for (i=0; i<pcidata[unit].number; i++) {
|
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(void)(*pcidata[unit].vector[i].proc)(pcidata[unit].vector[i].unit);
|
||
};
|
||
}
|
||
|
||
|
||
/*========================================================
|
||
**
|
||
** Autoconfiguration of pci devices.
|
||
**
|
||
** This is reverse to the isa configuration.
|
||
** (1) find a pci device.
|
||
** (2) look for a driver.
|
||
**
|
||
**========================================================
|
||
*/
|
||
|
||
/*--------------------------------------------------------
|
||
**
|
||
** The pci devices can be mapped to any address.
|
||
** As default we start at the last gigabyte.
|
||
**
|
||
**--------------------------------------------------------
|
||
*/
|
||
|
||
#ifndef PCI_PMEM_START
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||
#define PCI_PMEM_START 0xc0000000
|
||
#endif
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||
|
||
static vm_offset_t pci_paddr = PCI_PMEM_START;
|
||
|
||
/*---------------------------------------------------------
|
||
**
|
||
** pci_configure ()
|
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**
|
||
**---------------------------------------------------------
|
||
*/
|
||
|
||
static void not_supported (pcici_t tag, u_long type);
|
||
|
||
void pci_configure()
|
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{
|
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u_char device,last_device;
|
||
u_short bus,last_bus;
|
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pcici_t tag;
|
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pcidi_t type;
|
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u_long data;
|
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int unit;
|
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int intpin;
|
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int isanum;
|
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int pci_mode;
|
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|
||
struct pci_driver *drp;
|
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struct pci_device *dvp;
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|
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/*
|
||
** check pci bus present
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*/
|
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|
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pci_mode = pci_conf_mode ();
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if (!pci_mode) return;
|
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last_bus = pci_last_bus ();
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last_device = pci_mode==1 ? 31 : 15;
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|
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/*
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** hello world ..
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*/
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|
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#ifndef PCI_QUIET
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printf ("PCI configuration mode %d.\n", pci_mode);
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printf ("Scanning device 0..%d on pci bus 0..%d "
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"($Revision: 1.2 $)\n",
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last_device, last_bus);
|
||
#endif
|
||
|
||
for (bus=0;bus<=last_bus; bus++)
|
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for (device=0; device<=last_device; device ++) {
|
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tag = pcitag (bus, device, 0);
|
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type = pci_conf_read (tag, PCI_ID_REG);
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|
||
if ((!type) || (type==0xfffffffful)) continue;
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|
||
/*
|
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** lookup device in ioconfiguration:
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*/
|
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|
||
for (dvp = pci_devtab; dvp->pd_device_id; dvp++) {
|
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if (dvp->pd_device_id == type) break;
|
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};
|
||
drp = dvp->pd_driver;
|
||
|
||
if (!dvp->pd_device_id) {
|
||
int data = pci_conf_read(tag, PCI_CLASS_REV_REG);
|
||
enum pci_majclass class = PCI_MAJCLASS_OF(data);
|
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vm_offset_t va;
|
||
vm_offset_t pa;
|
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int reg;
|
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|
||
switch(class) {
|
||
case PCI_MJC_OLD:
|
||
if(PCI_MINCLASS_OF(data) != PCI_MIN_OVGA)
|
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break;
|
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case PCI_MJC_DISPLAY:
|
||
for (reg = PCI_MAP_REG_START;
|
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reg < PCI_MAP_REG_END;
|
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reg += 4) {
|
||
data = pci_map_mem(tag, reg, &va, &pa);
|
||
if(data == 0)
|
||
printf(
|
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"pci%d:%d: mapped VGA-like device at physaddr %lx\n",
|
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bus, device, (u_long)pa);
|
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|
||
}
|
||
continue;
|
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default:
|
||
#ifndef PCI_QUIET
|
||
printf("pci%d:%d: ", bus, device);
|
||
not_supported (tag, type);
|
||
#endif
|
||
}
|
||
}
|
||
|
||
if (!drp) {
|
||
if(dvp->pd_flags & PDF_LOADABLE) {
|
||
printf("%s: loadable device on pci%d:%d\n",
|
||
dvp->pd_name, bus, device);
|
||
}
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
** found it.
|
||
** probe returns the device unit.
|
||
*/
|
||
unit = (*drp->probe) (tag);
|
||
|
||
if (unit<0) {
|
||
printf ("%s <%s>: probe failed on pci%d:%d\n",
|
||
drp->name, drp->vendor, bus, device);
|
||
continue;
|
||
};
|
||
|
||
if (drp->name) {
|
||
printf ("%s%d <%s>", drp->name, unit, drp->vendor);
|
||
} else {
|
||
printf ("pci%d: <%s>", bus, drp->vendor);
|
||
}
|
||
|
||
/*
|
||
** install interrupts
|
||
*/
|
||
|
||
data = pci_conf_read (tag, PCI_INTERRUPT_REG);
|
||
intpin = PCI_INTERRUPT_PIN_EXTRACT(data);
|
||
if (intpin) {
|
||
int idx=NPCI;
|
||
|
||
/*
|
||
** Usage of int line register (if set by bios)
|
||
** Matt Thomas <thomas@lkg.dec.com>
|
||
*/
|
||
|
||
isanum = PCI_INTERRUPT_LINE_EXTRACT(data);
|
||
if (isanum) {
|
||
printf (" il=%d", isanum);
|
||
for (idx = 0; idx < NPCI; idx++) {
|
||
if (pcidata[idx].isanum == isanum)
|
||
break;
|
||
}
|
||
}
|
||
|
||
/*
|
||
** Or believe to the interrupt pin register.
|
||
*/
|
||
|
||
if (idx >= NPCI) idx = intpin-1;
|
||
|
||
/*
|
||
** And install the interrupt.
|
||
*/
|
||
|
||
if (idx<NPCI) {
|
||
u_short entry = pcidata[idx].number;
|
||
printf (" irq %c", 0x60+intpin);
|
||
if (entry < PCI_MAX_DPI) {
|
||
pcidata[idx].vector[entry].proc = drp->intr;
|
||
pcidata[idx].vector[entry].unit = unit;
|
||
entry++;
|
||
};
|
||
printf (" isa=%d [%d]",pcidata[idx].isanum, entry);
|
||
pcidata[idx].number=entry;
|
||
} else {
|
||
printf (" not installed");
|
||
}
|
||
}
|
||
|
||
/*
|
||
** enable memory access
|
||
*/
|
||
data = pci_conf_read (tag, PCI_COMMAND_STATUS_REG)
|
||
& 0xffff | PCI_COMMAND_MEM_ENABLE;
|
||
pci_conf_write (tag, (u_char) PCI_COMMAND_STATUS_REG, data);
|
||
|
||
printf (" on pci%d:%d\n", bus, device);
|
||
|
||
/*
|
||
** attach device
|
||
** may produce additional log messages,
|
||
** i.e. when installing subdevices.
|
||
*/
|
||
(void) (*drp->attach) (tag);
|
||
}
|
||
|
||
#ifndef PCI_QUIET
|
||
printf ("pci uses physical addresses from %lx to %lx\n",
|
||
(u_long)PCI_PMEM_START, (u_long)pci_paddr);
|
||
#endif
|
||
}
|
||
|
||
/*-----------------------------------------------------------------------
|
||
**
|
||
** Map device into port space.
|
||
**
|
||
** PCI-Specification: 6.2.5.1: address maps
|
||
**
|
||
**-----------------------------------------------------------------------
|
||
*/
|
||
|
||
extern vm_map_t kernel_map;
|
||
|
||
int pci_map_port (pcici_t tag, u_long reg, u_short* pa)
|
||
{
|
||
/*
|
||
** @MAPIO@ not yet implemented.
|
||
*/
|
||
return (ENOSYS);
|
||
}
|
||
|
||
/*-----------------------------------------------------------------------
|
||
**
|
||
** Map device into virtual and physical space
|
||
**
|
||
** PCI-Specification: 6.2.5.1: address maps
|
||
**
|
||
**-----------------------------------------------------------------------
|
||
*/
|
||
|
||
int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa)
|
||
{
|
||
u_long data, result;
|
||
vm_size_t vsize;
|
||
vm_offset_t vaddr;
|
||
|
||
/*
|
||
** sanity check
|
||
*/
|
||
|
||
if (reg <= PCI_MAP_REG_START || reg >= PCI_MAP_REG_END || (reg & 3))
|
||
return (EINVAL);
|
||
|
||
/*
|
||
** get size and type of memory
|
||
**
|
||
** type is in the lowest four bits.
|
||
** If device requires 2^n bytes, the next
|
||
** n-4 bits are read as 0.
|
||
*/
|
||
|
||
pci_conf_write (tag, reg, 0xfffffffful);
|
||
data = pci_conf_read (tag, reg);
|
||
|
||
switch (data & 0x0f) {
|
||
|
||
case PCI_MAP_MEMORY_TYPE_32BIT: /* 32 bit non cachable */
|
||
break;
|
||
|
||
default: /* unknown */
|
||
return (EINVAL);
|
||
};
|
||
|
||
/*
|
||
** mask out the type,
|
||
** and round up to a page size
|
||
*/
|
||
|
||
vsize = round_page (-(data & PCI_MAP_MEMORY_ADDRESS_MASK));
|
||
|
||
if (!vsize) return (EINVAL);
|
||
|
||
/*
|
||
** align physical address to virtual size
|
||
*/
|
||
|
||
if (data = pci_paddr % vsize)
|
||
pci_paddr += vsize - data;
|
||
|
||
vaddr = pmap_mapdev (pci_paddr, vsize);
|
||
|
||
#if 0
|
||
/*
|
||
** display values.
|
||
*/
|
||
|
||
printf (" virtual=0x%lx physical=0x%lx\n", (u_long)vaddr,
|
||
(u_long)pci_paddr);
|
||
#endif
|
||
|
||
/*
|
||
** return them to the driver
|
||
*/
|
||
|
||
*va = vaddr;
|
||
*pa = pci_paddr;
|
||
|
||
/*
|
||
** set device address
|
||
*/
|
||
|
||
pci_conf_write (tag, reg, pci_paddr);
|
||
|
||
return (0);
|
||
}
|
||
|
||
struct vt {
|
||
u_short ident;
|
||
char* name;
|
||
};
|
||
|
||
struct dt {
|
||
u_long ident;
|
||
char* name;
|
||
};
|
||
|
||
static struct vt VendorTable[] = {
|
||
{0x1002, "ATI TECHNOLOGIES INC"},
|
||
{0x1011, "DIGITAL EQUIPMENT COMPANY"},
|
||
{0x101A, "NCR"},
|
||
{0x102B, "MATROX"},
|
||
{0x1045, "OPTI"},
|
||
{0x5333, "S3 INC."},
|
||
{0x8086, "INTEL CORPORATION"},
|
||
{0,0}
|
||
};
|
||
|
||
static struct dt DeviceTable[] = {
|
||
{0x04848086, " 82378IB pci-isa bridge"},
|
||
{0x04838086, " 82424ZX cache dram controller"},
|
||
{0x04828086, " 82375EB pci-eisa bridge"},
|
||
{0x04A38086, " 82434LX pci cache memory controller"},
|
||
{0,0}
|
||
};
|
||
|
||
static const char *const majclasses[] = {
|
||
"old", "storage", "network", "display", "multimedia", "memory",
|
||
"bridge"
|
||
};
|
||
|
||
void not_supported (pcici_t tag, u_long type)
|
||
{
|
||
u_char reg;
|
||
u_long data;
|
||
struct vt * vp;
|
||
struct dt * dp;
|
||
|
||
/*
|
||
** lookup the names.
|
||
*/
|
||
|
||
for (vp=VendorTable; vp->ident; vp++)
|
||
if (vp->ident == (type & 0xffff))
|
||
break;
|
||
|
||
for (dp=DeviceTable; dp->ident; dp++)
|
||
if (dp->ident == type)
|
||
break;
|
||
|
||
/*
|
||
** and display them.
|
||
*/
|
||
|
||
if (vp->ident) printf (vp->name);
|
||
else printf ("vendor=%lx", type & 0xffff);
|
||
|
||
if (dp->ident) printf (dp->name);
|
||
else printf (", device=%lx", type >> 16);
|
||
|
||
data = pci_conf_read(tag, PCI_CLASS_REV_REG);
|
||
if (PCI_MAJCLASS_OF(data) < sizeof(majclasses) / sizeof(majclasses[0]))
|
||
printf(", class=%s", majclasses[PCI_MAJCLASS_OF(data)]);
|
||
|
||
printf (" [not supported]\n");
|
||
|
||
for (reg=PCI_MAP_REG_START; reg<PCI_MAP_REG_END; reg+=4) {
|
||
data = pci_conf_read (tag, reg);
|
||
if (!data) continue;
|
||
switch (data&7) {
|
||
|
||
case 1:
|
||
case 5:
|
||
printf (" map(%lx): io(%lx)\n", reg, data & ~3);
|
||
break;
|
||
case 0:
|
||
printf (" map(%lx): mem32(%lx)\n", reg, data & ~7);
|
||
break;
|
||
case 2:
|
||
printf (" map(%lx): mem20(%lx)\n", reg, data & ~7);
|
||
break;
|
||
case 4:
|
||
printf (" map(%lx): mem64(%lx)\n", reg, data & ~7);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
#endif
|