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9ddf96998e
freebsd/sys/dev/pci/pci.c
Stefan Eßer 9ddf96998e ncr.c: 
New config option "NCR_IOMAPPED" makes the driver use port I/O.
Put back in 53c815 defines, submitted by Mikael Hybsch <micke@dynas.se>.
These had got lost between cvs rev. 1.14 and now ...

pci.c:

Really write config space register.
Assign ports starting at 0xbc00.

Submitted by:	wolf
Reviewed by:	se
1995-02-14 23:33:38 +00:00

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/**************************************************************************
**
** $Id: pci.c,v 1.9 1994/11/02 23:47:13 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.
**
***************************************************************************
*/
#include <pci.h>
#if NPCI > 0
#ifndef __FreeBSD2__
#if __FreeBSD__ >= 2
#define __FreeBSD2__
#endif
#endif
/*========================================================
**
** #includes and declarations
**
**========================================================
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <pci/pcibus.h>
#include <machine/pmap.h>
#ifdef __FreeBSD2__
#include <sys/devconf.h>
struct pci_devconf {
struct kern_devconf pdc_kdc;
struct pci_info pdc_pi;
};
static int
pci_externalize (struct proc *, struct kern_devconf *, void *, size_t);
static int
pci_internalize (struct proc *, struct kern_devconf *, void *, size_t);
#else /* __FreeBSD2__ */
/*
** Function prototypes missing in system headers
*/
extern pmap_t pmap_kernel(void);
static vm_offset_t pmap_mapdev (vm_offset_t paddr, vm_size_t vsize);
#endif /* __FreeBSD2__ */
/*========================================================
**
** 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
#define PCI_PMEM_START 0xc0000000
#endif
static vm_offset_t pci_paddr = PCI_PMEM_START;
/*--------------------------------------------------------
**
** The pci ports can be mapped to any address.
** As default we start at 0x400
**
**--------------------------------------------------------
*/
#ifndef PCI_PORT_START
#define PCI_PORT_START 0xbc00
#endif
static u_short pci_ioaddr = PCI_PORT_START;
/*--------------------------------------------------------
**
** The pci device interrupt lines should have been
** assigned by the bios. But if the bios failed to
** to it, we set it.
**
**--------------------------------------------------------
*/
#ifndef PCI_IRQ
#define PCI_IRQ 0
#endif
static u_long pci_irq = PCI_IRQ;
/*---------------------------------------------------------
**
** pci_configure ()
**
** Probe all devices on pci bus and attach them.
**
** May be called more than once.
** Any device is attached only once.
** (Attached devices are remembered in pci_seen.)
**
**---------------------------------------------------------
*/
static void not_supported (pcici_t tag, u_long type);
static unsigned long pci_seen[NPCI];
static int pci_conf_count;
void pci_configure()
{
u_char device,last_device;
u_short bus;
pcici_t tag;
pcidi_t type;
u_long data;
int unit;
int pci_mechanism;
int pciint;
int irq;
char* name=0;
vm_offset_t old_addr=pci_paddr;
u_short old_ioaddr=pci_ioaddr;
int dvi;
struct pci_device *dvp=0;
#ifdef __FreeBSD2__
struct pci_devconf *pdcp;
#endif
/*
** first check pci bus driver available
*/
if (pcibus_set.ls_length <= 0)
return;
#define pcibus (*((struct pcibus*) pcibus_set.ls_items[0]))
/*
** check pci bus present
*/
pci_mechanism = pcibus.pb_mode ();
if (!pci_mechanism) return;
last_device = pci_mechanism==1 ? 31 : 15;
/*
** hello world ..
*/
for (bus=0;bus<NPCI;bus++) {
#ifndef PCI_QUIET
printf ("%s%d: scanning device 0..%d, mechanism=%d.\n",
pcibus.pb_name, bus, last_device, pci_mechanism);
#endif
for (device=0; device<=last_device; device ++) {
if (pci_seen[bus] & (1ul << device))
continue;
tag = pcibus.pb_tag (bus, device, 0);
type = pcibus.pb_read (tag, PCI_ID_REG);
if ((!type) || (type==0xfffffffful)) continue;
/*
** lookup device in ioconfiguration:
*/
for (dvi=0; dvi<pcidevice_set.ls_length; dvi++) {
dvp = (struct pci_device*) pcidevice_set.ls_items[dvi];
if ((name=(*dvp->pd_probe)(tag, type)))
break;
dvp = NULL;
};
if (dvp==NULL) {
#ifndef PCI_QUIET
if (pci_conf_count)
continue;
printf("%s%d:%d: ", pcibus.pb_name, bus, device);
not_supported (tag, type);
#endif
continue;
};
pci_seen[bus] |= (1ul << device);
/*
** Get and increment the unit.
*/
unit = (*dvp->pd_count)++;
/*
** ignore device ?
*/
if (!*name) continue;
/*
** Announce this device
*/
printf ("%s%d <%s>", dvp->pd_name, unit, name);
/*
** Get the int pin number (pci interrupt number a-d)
** from the pci configuration space.
*/
data = pcibus.pb_read (tag, PCI_INTERRUPT_REG);
pciint = PCI_INTERRUPT_PIN_EXTRACT(data);
if (pciint) {
printf (" int %c", 0x60+pciint);
/*
** If the interrupt line register is not set,
** set it now from PCI_IRQ.
*/
if (!(PCI_INTERRUPT_LINE_EXTRACT(data))) {
irq = pci_irq & 0x0f;
pci_irq >>= 4;
data = PCI_INTERRUPT_LINE_INSERT(data, irq);
printf (" (config)");
pcibus.pb_write (tag, PCI_INTERRUPT_REG, data);
};
irq = PCI_INTERRUPT_LINE_EXTRACT(data);
/*
** If it's zero, the isa irq number is unknown,
** and we cannot bind the pci interrupt to isa.
*/
if (irq)
printf (" irq %d", irq);
else
printf (" not bound");
};
/*
** enable memory access
*/
data = (pcibus.pb_read (tag, PCI_COMMAND_STATUS_REG)
& 0xffff) | PCI_COMMAND_MEM_ENABLE;
pcibus.pb_write (tag, (u_char) PCI_COMMAND_STATUS_REG, data);
/*
** show pci slot.
*/
printf (" on pci%d:%d\n", bus, device);
#ifdef __FreeBSD2__
/*
** Allocate a devconf structure
*/
pdcp = (struct pci_devconf *)
malloc (sizeof (struct pci_devconf),M_DEVBUF,M_WAITOK);
/*
** Fill in.
**
** Sorry, this is not yet complete.
** We should, and eventually will, set the
** parent pointer to a pci bus devconf structure,
** and arrange to set the state field dynamically.
**
** But I'll go to vacation today, and after all,
** wasn't there a new feature freeze on Oct 1.?
*/
pdcp -> pdc_pi.pi_bus = bus;
pdcp -> pdc_pi.pi_device = device;
pdcp -> pdc_kdc.kdc_name = dvp->pd_name;
pdcp -> pdc_kdc.kdc_unit = unit;
pdcp -> pdc_kdc.kdc_md.mddc_devtype = MDDT_PCI;
pdcp -> pdc_kdc.kdc_externalize = pci_externalize;
pdcp -> pdc_kdc.kdc_internalize = pci_internalize;
pdcp -> pdc_kdc.kdc_datalen = PCI_EXTERNAL_LEN;
pdcp -> pdc_kdc.kdc_parentdata = &pdcp->pdc_pi;
pdcp -> pdc_kdc.kdc_state = DC_UNKNOWN;
pdcp -> pdc_kdc.kdc_description = name;
/*
** And register this device
*/
dev_attach (&pdcp->pdc_kdc);
#endif /* __FreeBSD2__ */
/*
** attach device
** may produce additional log messages,
** i.e. when installing subdevices.
*/
(*dvp->pd_attach) (tag, unit);
};
};
#ifndef PCI_QUIET
if (pci_paddr != old_addr)
printf ("pci uses physical addresses from 0x%lx to 0x%lx\n",
(u_long)PCI_PMEM_START, (u_long)pci_paddr);
if (pci_ioaddr != old_ioaddr)
printf ("pci devices use ioports from 0x%x to 0x%x\n",
(unsigned)PCI_PORT_START, (unsigned)pci_ioaddr);
#endif
pci_conf_count++;
}
/*-----------------------------------------------------------------
**
** 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)
{
return (pcibus.pb_read (tag, reg));
}
void
pci_conf_write (pcici_t tag, u_long reg, u_long data)
{
pcibus.pb_write (tag, reg, data);
}
/*-----------------------------------------------------------------------
**
** Map device into port space.
**
** PCI-Specification: 6.2.5.1: address maps
**
**-----------------------------------------------------------------------
*/
int pci_map_port (pcici_t tag, u_long reg, u_short* pa)
{
u_long data;
u_short size;
/*
** sanity check
*/
if (reg < PCI_MAP_REG_START || reg >= PCI_MAP_REG_END || (reg & 3)) {
printf ("pci_map_port failed: bad register=0x%x\n",
(unsigned)reg);
return (0);
};
/*
** get size and type of port
**
** type is in the lowest two bits.
** If device requires 2^n bytes, the next
** n-2 bits are hardwired as 0.
*/
pcibus.pb_write (tag, reg, 0xfffffffful);
data = pcibus.pb_read (tag, reg);
switch (data & 0x03) {
case PCI_MAP_IO:
break;
default: /* unknown */
printf ("pci_map_port failed: bad port type=0x%x\n",
(unsigned) data);
return (0);
};
/*
** get the size
*/
size = -(data & PCI_MAP_IO_ADDRESS_MASK);
if (!size) return (0);
/*
** align physical address to virtual size
*/
if ((data = pci_ioaddr % size))
pci_ioaddr += size - data;
#ifndef PCI_QUIET
/*
** display values.
*/
printf ("\treg%d: ioaddr=0x%x size=0x%x\n",
(unsigned) reg, (unsigned) pci_ioaddr, (unsigned) size);
#endif
/*
** set device address
*/
pcibus.pb_write (tag, reg, (u_long) pci_ioaddr);
/*
** return them to the driver
*/
*pa = pci_ioaddr;
/*
** and don't forget to increment pci_ioaddr
*/
pci_ioaddr += size;
return (1);
}
/*-----------------------------------------------------------------------
**
** 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;
vm_size_t vsize;
vm_offset_t vaddr;
int i;
/*
** sanity check
*/
if (reg < PCI_MAP_REG_START || reg >= PCI_MAP_REG_END || (reg & 3)) {
printf ("pci_map_mem failed: bad register=0x%x\n",
(unsigned)reg);
return (0);
};
/*
** 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.
*/
pcibus.pb_write (tag, reg, 0xfffffffful);
data = pcibus.pb_read (tag, reg);
switch (data & 0x0f) {
case PCI_MAP_MEMORY_TYPE_32BIT: /* 32 bit non cachable */
break;
default: /* unknown */
printf ("pci_map_mem failed: bad memory type=0x%x\n",
(unsigned) data);
return (0);
};
/*
** mask out the type,
** and round up to a page size
*/
vsize = round_page (-(data & PCI_MAP_MEMORY_ADDRESS_MASK));
if (!vsize) return (0);
/*
** align physical address to virtual size
*/
if ((data = pci_paddr % vsize))
pci_paddr += vsize - data;
vaddr = (vm_offset_t) pmap_mapdev (pci_paddr, vsize);
if (!vaddr) return (0);
#ifndef PCI_QUIET
/*
** display values.
*/
printf ("\treg%d: virtual=0x%lx physical=0x%lx\n",
(unsigned) reg, (u_long)vaddr, (u_long)pci_paddr);
#endif
/*
** probe for already mapped device.
*/
for (i=0; i<vsize; i+=4) {
u_long* addr = (u_long*) (vaddr+i);
data = *addr;
if (data != 0xffffffff) {
printf ("WARNING: possible address conflict "
"at 0x%08x (read: 0x%08x).\n",
(unsigned) pci_paddr+i, (unsigned) data);
break;
};
};
/*
** return them to the driver
*/
*va = vaddr;
*pa = pci_paddr;
/*
** set device address
*/
pcibus.pb_write (tag, reg, pci_paddr);
/*
** and don't forget to increment pci_paddr
*/
pci_paddr += vsize;
return (1);
}
/*------------------------------------------------------------
**
** Interface functions for the devconf module.
**
**------------------------------------------------------------
*/
static int
pci_externalize (struct proc *p, struct kern_devconf *kdcp, void *u, size_t l)
{
struct pci_externalize_buffer buffer;
struct pci_info * pip = kdcp->kdc_parentdata;
pcici_t tag;
int i;
if (l < sizeof buffer) {
return ENOMEM;
};
tag = pcibus.pb_tag (pip->pi_bus, pip->pi_device, 0);
buffer.peb_pci_info = *pip;
for (i=0; i<PCI_EXT_CONF_LEN; i++) {
buffer.peb_config[i] = pcibus.pb_read (tag, i*4);
};
return copyout(&buffer, u, sizeof buffer);
}
static int
pci_internalize (struct proc *p, struct kern_devconf *kdcp, void *u, size_t s)
{
return EOPNOTSUPP;
}
/*-----------------------------------------------------------------------
**
** Map pci interrupts to isa interrupts.
**
**-----------------------------------------------------------------------
*/
int pci_map_int (pcici_t tag, int(*func)(), void* arg, unsigned* maskptr)
{
int irq, result;
irq = PCI_INTERRUPT_LINE_EXTRACT(
pcibus.pb_read (tag, PCI_INTERRUPT_REG));
if (irq >= 16 || irq <= 0) {
printf ("pci_map_int failed: no int line set.\n");
return (0);
}
result = pcibus.pb_regint (tag, func, arg, maskptr);
if (!result) {
printf ("pci_map_int failed.\n");
return (0);
};
return (1);
}
/*-----------------------------------------------------------
**
** Display of unknown devices.
**
**-----------------------------------------------------------
*/
struct vt {
u_short ident;
char* name;
};
static struct vt VendorTable[] = {
{0x1002, "ATI TECHNOLOGIES INC"},
{0x1011, "DIGITAL EQUIPMENT CORPORATION"},
{0x101A, "NCR"},
{0x102B, "MATROX"},
{0x1045, "OPTI"},
{0x5333, "S3 INC."},
{0x8086, "INTEL CORPORATION"},
{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;
/*
** lookup the names.
*/
for (vp=VendorTable; vp->ident; vp++)
if (vp->ident == (type & 0xffff))
break;
/*
** and display them.
*/
if (vp->ident) printf (vp->name);
else printf ("vendor=0x%lx", type & 0xffff);
printf (", device=0x%lx", type >> 16);
data = (pcibus.pb_read(tag, PCI_CLASS_REG) >> 24) & 0xff;
if (data < sizeof(majclasses) / sizeof(majclasses[0]))
printf(", class=%s", majclasses[data]);
printf (" [not supported]\n");
for (reg=PCI_MAP_REG_START; reg<PCI_MAP_REG_END; reg+=4) {
data = pcibus.pb_read (tag, reg);
if (!data) continue;
switch (data&7) {
case 1:
case 5:
printf (" map(%x): io(%lx)\n",
reg, data & ~3);
break;
case 0:
printf (" map(%x): mem32(%lx)\n",
reg, data & ~7);
break;
case 2:
printf (" map(%x): mem20(%lx)\n",
reg, data & ~7);
break;
case 4:
printf (" map(%x): mem64(%lx)\n",
reg, data & ~7);
break;
}
}
}
#ifndef __FreeBSD2__
/*-----------------------------------------------------------
**
** Mapping of physical to virtual memory
**
**-----------------------------------------------------------
*/
extern vm_map_t kernel_map;
static vm_offset_t pmap_mapdev (vm_offset_t paddr, vm_size_t vsize)
{
vm_offset_t vaddr,value;
u_long result;
vaddr = vm_map_min (kernel_map);
result = vm_map_find (kernel_map, (void*)0, (vm_offset_t) 0,
&vaddr, vsize, TRUE);
if (result != KERN_SUCCESS) {
printf (" vm_map_find failed(%d)\n", result);
return (0);
};
/*
** map physical
*/
value = vaddr;
while (vsize >= NBPG) {
pmap_enter (pmap_kernel(), vaddr, paddr,
VM_PROT_READ|VM_PROT_WRITE, TRUE);
vaddr += NBPG;
paddr += NBPG;
vsize -= NBPG;
};
return (value);
}
/*------------------------------------------------------------
**
** Emulate the register_intr() function of FreeBSD 2.0
**
** requires a patch:
** FreeBSD 2.0: "/sys/i386/isa/vector.s"
** 386bsd0.1: "/sys/i386/isa/icu.s"
** 386bsd1.0: Please ask Jesus Monroy Jr.
**
**------------------------------------------------------------
*/
#include <machine/segments.h>
int pci_int_unit [16];
inthand2_t* (pci_int_hdlr [16]);
unsigned int * pci_int_mptr [16];
unsigned int pci_int_count[16];
extern void
Vpci3(), Vpci4(), Vpci5(), Vpci6(), Vpci7(), Vpci8(), Vpci9(),
Vpci10(), Vpci11(), Vpci12(), Vpci13(), Vpci14(), Vpci15();
static inthand_t* pci_int_glue[16] = {
0, 0, 0, Vpci3, Vpci4, Vpci5, Vpci6, Vpci7, Vpci8,
Vpci9, Vpci10, Vpci11, Vpci12, Vpci13, Vpci14, Vpci15 };
static int
register_intr __P((int intr, int device_id, unsigned int flags,
inthand2_t *handler, unsigned int* mptr, int unit))
{
if (intr >= 16 || intr <= 2)
return (EINVAL);
if (pci_int_hdlr [intr])
return (EBUSY);
pci_int_hdlr [intr] = handler;
pci_int_unit [intr] = unit;
pci_int_mptr [intr] = mptr;
setidt(NRSVIDT + intr, pci_int_glue[intr], SDT_SYS386IGT, SEL_KPL);
return (0);
}
#endif /* __FreeBSD2__ */
#endif /* NPCI */
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