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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/sound/driver/driver/@/dev/tdfx/tdfx_pci.c |
/*-
* Copyright (c) 2000-2001 by Coleman Kane <cokane@FreeBSD.org>
* 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 Gardner Buchanan.
* 4. The name of Gardner Buchanan 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 <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/tdfx/tdfx_pci.c 223624 2011-06-28 08:36:48Z kevlo $");
/* 3dfx driver for FreeBSD 4.x - Finished 11 May 2000, 12:25AM ET
*
* Copyright (C) 2000-2001, by Coleman Kane <cokane@FreeBSD.org>,
* based upon the 3dfx driver written for linux, by Daryll Straus, Jon Taylor,
* and Jens Axboe, located at http://linux.3dfx.com.
*/
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/filio.h>
#include <sys/ioccom.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/signalvar.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
/* rman.h depends on machine/bus.h */
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/tdfx/tdfx_io.h>
#include <dev/tdfx/tdfx_vars.h>
#include <dev/tdfx/tdfx_pci.h>
static devclass_t tdfx_devclass;
static int tdfx_count = 0;
/* Set up the boot probe/attach routines */
static device_method_t tdfx_methods[] = {
DEVMETHOD(device_probe, tdfx_probe),
DEVMETHOD(device_attach, tdfx_attach),
DEVMETHOD(device_detach, tdfx_detach),
DEVMETHOD(device_shutdown, tdfx_shutdown),
{ 0, 0 }
};
MALLOC_DEFINE(M_TDFX,"tdfx_driver","3DFX Graphics[/2D]/3D Accelerator(s)");
/* Char. Dev. file operations structure */
static struct cdevsw tdfx_cdev = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = tdfx_open,
.d_close = tdfx_close,
.d_ioctl = tdfx_ioctl,
.d_mmap = tdfx_mmap,
.d_name = "tdfx",
};
static int
tdfx_probe(device_t dev)
{
/*
* probe routine called on kernel boot to register supported devices. We get
* a device structure to work with, and we can test the VENDOR/DEVICE IDs to
* see if this PCI device is one that we support. Return BUS_PRROBE_DEFAULT
* if yes, ENXIO if not.
*/
switch(pci_get_devid(dev)) {
case PCI_DEVICE_ALLIANCE_AT3D:
device_set_desc(dev, "ProMotion At3D 3D Accelerator");
return BUS_PROBE_DEFAULT;
case PCI_DEVICE_3DFX_VOODOO2:
device_set_desc(dev, "3DFX Voodoo II 3D Accelerator");
return BUS_PROBE_DEFAULT;
/*case PCI_DEVICE_3DFX_BANSHEE:
device_set_desc(dev, "3DFX Voodoo Banshee 2D/3D Graphics Accelerator");
return BUS_PROBE_DEFAULT;
case PCI_DEVICE_3DFX_VOODOO3:
device_set_desc(dev, "3DFX Voodoo3 2D/3D Graphics Accelerator");
return BUS_PROBE_DEFAULT;*/
case PCI_DEVICE_3DFX_VOODOO1:
device_set_desc(dev, "3DFX Voodoo Graphics 3D Accelerator");
return BUS_PROBE_DEFAULT;
};
return ENXIO;
}
static int
tdfx_attach(device_t dev) {
/*
* The attach routine is called after the probe routine successfully says it
* supports a given card. We now proceed to initialize this card for use with
* the system. I want to map the device memory for userland allocation and
* fill an information structure with information on this card. I'd also like
* to set Write Combining with the MTRR code so that we can hopefully speed
* up memory writes. The last thing is to register the character device
* interface to the card, so we can open it from /dev/3dfxN, where N is a
* small, whole number.
*/
struct tdfx_softc *tdfx_info;
u_long val;
/* rid value tells bus_alloc_resource where to find the addresses of ports or
* of memory ranges in the PCI config space*/
int rid = PCIR_BAR(0);
/* Increment the card counter (for the ioctl code) */
tdfx_count++;
/* Enable MemMap on Voodoo */
val = pci_read_config(dev, PCIR_COMMAND, 2);
val |= (PCIM_CMD_MEMEN);
pci_write_config(dev, PCIR_COMMAND, val, 2);
val = pci_read_config(dev, PCIR_COMMAND, 2);
/* Fill the soft config struct with info about this device*/
tdfx_info = device_get_softc(dev);
tdfx_info->dev = dev;
tdfx_info->vendor = pci_get_vendor(dev);
tdfx_info->type = pci_get_devid(dev) >> 16;
tdfx_info->bus = pci_get_bus(dev);
tdfx_info->dv = pci_get_slot(dev);
tdfx_info->curFile = NULL;
/*
* Get the Memory Location from the PCI Config, mask out lower word, since
* the config space register is only one word long (this is nicer than a
* bitshift).
*/
tdfx_info->addr0 = (pci_read_config(dev, 0x10, 4) & 0xffff0000);
#ifdef DEBUG
device_printf(dev, "Base0 @ 0x%x\n", tdfx_info->addr0);
#endif
/* Notify the VM that we will be mapping some memory later */
tdfx_info->memrange = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&rid, RF_ACTIVE | RF_SHAREABLE);
if(tdfx_info->memrange == NULL) {
#ifdef DEBUG
device_printf(dev, "Error mapping mem, won't be able to use mmap()\n");
#endif
tdfx_info->memrid = 0;
}
else {
tdfx_info->memrid = rid;
#ifdef DEBUG
device_printf(dev, "Mapped to: 0x%x\n",
(unsigned int)rman_get_start(tdfx_info->memrange));
#endif
}
/* Setup for Voodoo3 and Banshee, PIO and an extram Memrange */
if(pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3 ||
pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE) {
rid = 0x14; /* 2nd mem map */
tdfx_info->addr1 = (pci_read_config(dev, 0x14, 4) & 0xffff0000);
#ifdef DEBUG
device_printf(dev, "Base1 @ 0x%x\n", tdfx_info->addr1);
#endif
tdfx_info->memrange2 = bus_alloc_resource_any(dev,
SYS_RES_MEMORY, &rid, RF_ACTIVE | RF_SHAREABLE);
if(tdfx_info->memrange2 == NULL) {
#ifdef DEBUG
device_printf(dev, "Mem1 couldn't be allocated, glide may not work.");
#endif
tdfx_info->memrid2 = 0;
}
else {
tdfx_info->memrid2 = rid;
}
/* Now to map the PIO stuff */
rid = PCIR_IOBASE0_2;
tdfx_info->pio0 = pci_read_config(dev, 0x2c, 2);
tdfx_info->pio0max = pci_read_config(dev, 0x30, 2) + tdfx_info->pio0;
tdfx_info->piorange = bus_alloc_resource_any(dev,
SYS_RES_IOPORT, &rid, RF_ACTIVE | RF_SHAREABLE);
if(tdfx_info->piorange == NULL) {
#ifdef DEBUG
device_printf(dev, "Couldn't map PIO range.");
#endif
tdfx_info->piorid = 0;
}
else {
tdfx_info->piorid = rid;
}
} else {
tdfx_info->addr1 = 0;
tdfx_info->memrange2 = NULL;
tdfx_info->piorange = NULL;
}
/*
* Set Writecombining, or at least Uncacheable for the memory region, if we
* are able to
*/
if(tdfx_setmtrr(dev) != 0) {
#ifdef DEBUG
device_printf(dev, "Some weird error setting MTRRs");
#endif
return -1;
}
/*
* make_dev registers the cdev to access the 3dfx card from /dev
* use hex here for the dev num, simply to provide better support if > 10
* voodoo cards, for the mad. The user must set the link.
* Why would we want that many voodoo cards anyhow?
*/
tdfx_info->devt = make_dev(&tdfx_cdev, device_get_unit(dev),
UID_ROOT, GID_WHEEL, 0600, "3dfx%x", device_get_unit(dev));
tdfx_info->devt->si_drv1 = tdfx_info;
return 0;
}
static int
tdfx_detach(device_t dev) {
struct tdfx_softc* tdfx_info;
int retval;
tdfx_info = device_get_softc(dev);
/* Delete allocated resource, of course */
bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid,
tdfx_info->memrange);
/* Release extended Voodoo3/Banshee resources */
if(pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE ||
pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) {
if(tdfx_info->memrange2 != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, tdfx_info->memrid2,
tdfx_info->memrange);
/* if(tdfx_info->piorange != NULL)
bus_release_resource(dev, SYS_RES_IOPORT, tdfx_info->piorid,
tdfx_info->piorange);*/
}
/* Though it is safe to leave the WRCOMB support since the
mem driver checks for it, we should remove it in order
to free an MTRR for another device */
retval = tdfx_clrmtrr(dev);
#ifdef DEBUG
if(retval != 0)
printf("tdfx: For some reason, I couldn't clear the mtrr\n");
#endif
/* Remove device entry when it can no longer be accessed */
destroy_dev(tdfx_info->devt);
return(0);
}
static int
tdfx_shutdown(device_t dev) {
#ifdef DEBUG
device_printf(dev, "tdfx: Device Shutdown\n");
#endif
return 0;
}
static int
tdfx_clrmtrr(device_t dev) {
/* This function removes the MTRR set by the attach call, so it can be used
* in the future by other drivers.
*/
int retval, act;
struct tdfx_softc *tdfx_info = device_get_softc(dev);
act = MEMRANGE_SET_REMOVE;
retval = mem_range_attr_set(&tdfx_info->mrdesc, &act);
return retval;
}
static int
tdfx_setmtrr(device_t dev) {
/*
* This is the MTRR setting function for the 3dfx card. It is called from
* tdfx_attach. If we can't set the MTRR properly, it's not the end of the
* world. We can still continue, just with slightly (very slightly) degraded
* performance.
*/
int retval = 0, act;
struct tdfx_softc *tdfx_info = device_get_softc(dev);
/* The older Voodoo cards have a shorter memrange than the newer ones */
if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1) || (pci_get_devid(dev) ==
PCI_DEVICE_3DFX_VOODOO2)) {
tdfx_info->mrdesc.mr_len = 0x400000;
/* The memory descriptor is described as the top 15 bits of the real
address */
tdfx_info->mrdesc.mr_base = tdfx_info->addr0 & 0xfffe0000;
}
else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO3) ||
(pci_get_devid(dev) == PCI_DEVICE_3DFX_BANSHEE)) {
tdfx_info->mrdesc.mr_len = 0x1000000;
/* The Voodoo3 and Banshee LFB is the second memory address */
/* The memory descriptor is described as the top 15 bits of the real
address */
tdfx_info->mrdesc.mr_base = tdfx_info->addr1 & 0xfffe0000;
}
else
return 0;
/*
* The Alliance Pro Motion AT3D was not mentioned in the linux
* driver as far as MTRR support goes, so I just won't put the
* code in here for it. This is where it should go, though.
*/
/* Firstly, try to set write combining */
tdfx_info->mrdesc.mr_flags = MDF_WRITECOMBINE;
bcopy("tdfx", &tdfx_info->mrdesc.mr_owner, 4);
act = MEMRANGE_SET_UPDATE;
retval = mem_range_attr_set(&tdfx_info->mrdesc, &act);
if(retval == 0) {
#ifdef DEBUG
device_printf(dev, "MTRR Set Correctly for tdfx\n");
#endif
} else if((pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO2) ||
(pci_get_devid(dev) == PCI_DEVICE_3DFX_VOODOO1)) {
/* if, for some reason we can't set the WRCOMB range with the V1/V2, we
* can still possibly use the UNCACHEABLE region for it instead, and help
* out in a small way */
tdfx_info->mrdesc.mr_flags = MDF_UNCACHEABLE;
/* This length of 1000h was taken from the linux device driver... */
tdfx_info->mrdesc.mr_len = 0x1000;
/*
* If, for some reason, we can't set the MTRR (N/A?) we may still continue
*/
#ifdef DEBUG
device_printf(dev, "MTRR Set Type Uncacheable %x\n",
(u_int32_t)tdfx_info->mrdesc.mr_base);
#endif
}
#ifdef DEBUG
else {
device_printf(dev, "Couldn't Set MTRR\n");
return 0;
}
#endif
return 0;
}
static int
tdfx_open(struct cdev *dev, int flags, int fmt, struct thread *td)
{
/*
* The open cdev method handles open(2) calls to /dev/3dfx[n]
* We can pretty much allow any opening of the device.
*/
struct tdfx_softc *tdfx_info = dev->si_drv1;
if(tdfx_info->busy != 0) return EBUSY;
#ifdef DEBUG
printf("3dfx: Opened by #%d\n", td->td_proc->p_pid);
#endif
/* Set the driver as busy */
tdfx_info->busy++;
return 0;
}
static int
tdfx_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
{
/*
* The close cdev method handles close(2) calls to /dev/3dfx[n]
* We'll always want to close the device when it's called.
*/
struct tdfx_softc *tdfx_info = dev->si_drv1;
if(tdfx_info->busy == 0) return EBADF;
tdfx_info->busy = 0;
#ifdef DEBUG
printf("Closed by #%d\n", td->td_proc->p_pid);
#endif
return 0;
}
static int
tdfx_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
int nprot, vm_memattr_t *memattr)
{
/*
* mmap(2) is called by a user process to request that an area of memory
* associated with this device be mapped for the process to work with. Nprot
* holds the protections requested, PROT_READ, PROT_WRITE, or both.
*/
/**** OLD GET CONFIG ****/
/* struct tdfx_softc* tdfx_info; */
/* Get the configuration for our card XXX*/
/*tdfx_info = dev->si_drv1; */
/************************/
struct tdfx_softc* tdfx_info[2];
tdfx_info[0] = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 0);
/* If, for some reason, its not configured, we bail out */
if(tdfx_info[0] == NULL) {
#ifdef DEBUG
printf("tdfx: tdfx_info (softc) is NULL\n");
#endif
return -1;
}
/* We must stay within the bound of our address space */
if((offset & 0xff000000) == tdfx_info[0]->addr0) {
offset &= 0xffffff;
*paddr = rman_get_start(tdfx_info[0]->memrange) + offset;
return 0;
}
if(tdfx_count > 1) {
tdfx_info[1] = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass, 1);
if((offset & 0xff000000) == tdfx_info[1]->addr0) {
offset &= 0xffffff;
*paddr = rman_get_start(tdfx_info[1]->memrange) +
offset;
return 0;
}
}
/* See if the Banshee/V3 LFB is being requested */
/*if(tdfx_info->memrange2 != NULL && (offset & 0xff000000) ==
tdfx_info->addr1) {
offset &= 0xffffff;
return atop(rman_get_start(tdfx_info[1]->memrange2) + offset);
}*/ /* VoodooNG code */
/* The ret call */
/* atop -> address to page
* rman_get_start, get the (struct resource*)->r_start member,
* the mapping base address.
*/
return -1;
}
static int
tdfx_query_boards(void) {
/*
* This returns the number of installed tdfx cards, we have been keeping
* count, look at tdfx_attach
*/
return tdfx_count;
}
static int
tdfx_query_fetch(u_int cmd, struct tdfx_pio_data *piod)
{
/* XXX Comment this later, after careful inspection and spring cleaning :) */
/* Various return values 8bit-32bit */
u_int8_t ret_byte;
u_int16_t ret_word;
u_int32_t ret_dword;
struct tdfx_softc* tdfx_info = NULL;
/* This one depend on the tdfx_* structs being properly initialized */
/*piod->device &= 0xf;*/
if((piod == NULL) ||(tdfx_count <= piod->device) ||
(piod->device < 0)) {
#ifdef DEBUG
printf("tdfx: Bad device or internal struct in tdfx_query_fetch\n");
#endif
return -EINVAL;
}
tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass,
piod->device);
if(tdfx_info == NULL) return -ENXIO;
/* We must restrict the size reads from the port, since to high or low of a
* size witll result in wrong data being passed, and that's bad */
/* A few of these were pulled during the attach phase */
switch(piod->port) {
case PCI_VENDOR_ID_FREEBSD:
if(piod->size != 2) return -EINVAL;
copyout(&tdfx_info->vendor, piod->value, piod->size);
return 0;
case PCI_DEVICE_ID_FREEBSD:
if(piod->size != 2) return -EINVAL;
copyout(&tdfx_info->type, piod->value, piod->size);
return 0;
case PCI_BASE_ADDRESS_0_FREEBSD:
if(piod->size != 4) return -EINVAL;
copyout(&tdfx_info->addr0, piod->value, piod->size);
return 0;
case PCI_BASE_ADDRESS_1_FREEBSD:
if(piod->size != 4) return -EINVAL;
copyout(&tdfx_info->addr1, piod->value, piod->size);
return 0;
case PCI_PRIBUS_FREEBSD:
if(piod->size != 1) return -EINVAL;
break;
case PCI_IOBASE_0_FREEBSD:
if(piod->size != 2) return -EINVAL;
break;
case PCI_IOLIMIT_0_FREEBSD:
if(piod->size != 2) return -EINVAL;
break;
case SST1_PCI_SPECIAL1_FREEBSD:
if(piod->size != 4) return -EINVAL;
break;
case PCI_REVISION_ID_FREEBSD:
if(piod->size != 1) return -EINVAL;
break;
case SST1_PCI_SPECIAL4_FREEBSD:
if(piod->size != 4) return -EINVAL;
break;
default:
return -EINVAL;
}
/* Read the value and return */
switch(piod->size) {
case 1:
ret_byte = pci_read_config(tdfx_info[piod->device].dev,
piod->port, 1);
copyout(&ret_byte, piod->value, 1);
break;
case 2:
ret_word = pci_read_config(tdfx_info[piod->device].dev,
piod->port, 2);
copyout(&ret_word, piod->value, 2);
break;
case 4:
ret_dword = pci_read_config(tdfx_info[piod->device].dev,
piod->port, 4);
copyout(&ret_dword, piod->value, 4);
break;
default:
return -EINVAL;
}
return 0;
}
static int
tdfx_query_update(u_int cmd, struct tdfx_pio_data *piod)
{
/* XXX Comment this later, after careful inspection and spring cleaning :) */
/* Return vals */
u_int8_t ret_byte;
u_int16_t ret_word;
u_int32_t ret_dword;
/* Port vals, mask */
u_int32_t retval, preval, mask;
struct tdfx_softc* tdfx_info = NULL;
if((piod == NULL) || (piod->device >= (tdfx_count &
0xf))) {
#ifdef DEBUG
printf("tdfx: Bad struct or device in tdfx_query_update\n");
#endif
return -EINVAL;
}
tdfx_info = (struct tdfx_softc*)devclass_get_softc(tdfx_devclass,
piod->device);
if(tdfx_info == NULL) return -ENXIO;
/* Code below this line in the fuction was taken from the
* Linux driver and converted for freebsd. */
/* Check the size for all the ports, to make sure stuff doesn't get messed up
* by poorly written clients */
switch(piod->port) {
case PCI_COMMAND_FREEBSD:
if(piod->size != 2) return -EINVAL;
break;
case SST1_PCI_SPECIAL1_FREEBSD:
if(piod->size != 4) return -EINVAL;
break;
case SST1_PCI_SPECIAL2_FREEBSD:
if(piod->size != 4) return -EINVAL;
break;
case SST1_PCI_SPECIAL3_FREEBSD:
if(piod->size != 4) return -EINVAL;
break;
case SST1_PCI_SPECIAL4_FREEBSD:
if(piod->size != 4) return -EINVAL;
break;
default:
return -EINVAL;
}
/* Read the current value */
retval = pci_read_config(tdfx_info->dev, piod->port & ~3, 4);
/* These set up a mask to use, since apparently they wanted to write 4 bytes
* at once to the ports */
switch (piod->size) {
case 1:
copyin(piod->value, &ret_byte, 1);
preval = ret_byte << (8 * (piod->port & 0x3));
mask = 0xff << (8 * (piod->port & 0x3));
break;
case 2:
copyin(piod->value, &ret_word, 2);
preval = ret_word << (8 * (piod->port & 0x3));
mask = 0xffff << (8 * (piod->port & 0x3));
break;
case 4:
copyin(piod->value, &ret_dword, 4);
preval = ret_dword;
mask = ~0;
break;
default:
return -EINVAL;
}
/* Finally, combine the values and write it to the port */
retval = (retval & ~mask) | preval;
pci_write_config(tdfx_info->dev, piod->port & ~3, retval, 4);
return 0;
}
/* For both of these, I added a variable named workport of type u_int so
* that I could eliminate the warning about my data type size. The
* applications expect the port to be of type short, so I needed to change
* this within the function */
static int
tdfx_do_pio_rd(struct tdfx_pio_data *piod)
{
/* Return val */
u_int8_t ret_byte;
u_int workport;
struct tdfx_softc *tdfx_info =
(struct tdfx_softc*)devclass_get_softc(tdfx_devclass, piod->device);
/* Restricts the access of ports other than those we use */
if(((piod->port != VGA_INPUT_STATUS_1C) || (piod->port != SC_INDEX) ||
(piod->port != SC_DATA) || (piod->port != VGA_MISC_OUTPUT_READ)) &&
(piod->port < tdfx_info->pio0) && (piod->port > tdfx_info->pio0max))
return -EPERM;
/* All VGA STATUS REGS are byte registers, size should never be > 1 */
if(piod->size != 1) {
return -EINVAL;
}
/* Write the data to the intended port */
workport = piod->port;
ret_byte = inb(workport);
copyout(&ret_byte, piod->value, sizeof(u_int8_t));
return 0;
}
static int
tdfx_do_pio_wt(struct tdfx_pio_data *piod)
{
/* return val */
u_int8_t ret_byte;
u_int workport;
struct tdfx_softc *tdfx_info = (struct
tdfx_softc*)devclass_get_softc(tdfx_devclass, piod->device);
/* Replace old switch w/ massive if(...) */
/* Restricts the access of ports other than those we use */
if(((piod->port != SC_INDEX) && (piod->port != SC_DATA) &&
(piod->port != VGA_MISC_OUTPUT_READ)) /* Can't write VGA_ST_1C */ &&
(piod->port < tdfx_info->pio0) && (piod->port > tdfx_info->pio0max))
return -EPERM;
/* All VGA STATUS REGS are byte registers, size should never be > 1 */
if(piod->size != 1) {
return -EINVAL;
}
/* Write the data to the intended port */
copyin(piod->value, &ret_byte, sizeof(u_int8_t));
workport = piod->port;
outb(workport, ret_byte);
return 0;
}
static int
tdfx_do_query(u_int cmd, struct tdfx_pio_data *piod)
{
/* There are three sub-commands to the query 0x33 */
switch(_IOC_NR(cmd)) {
case 2:
return tdfx_query_boards();
break;
case 3:
return tdfx_query_fetch(cmd, piod);
break;
case 4:
return tdfx_query_update(cmd, piod);
break;
default:
/* In case we are thrown a bogus sub-command! */
#ifdef DEBUG
printf("Bad Sub-cmd: 0x%x\n", _IOC_NR(cmd));
#endif
return -EINVAL;
}
}
static int
tdfx_do_pio(u_int cmd, struct tdfx_pio_data *piod)
{
/* Two types of PIO, INPUT and OUTPUT, as the name suggests */
switch(_IOC_DIR(cmd)) {
case IOCV_OUT:
return tdfx_do_pio_rd(piod);
break;
case IOCV_IN:
return tdfx_do_pio_wt(piod);
break;
default:
return -EINVAL;
}
}
/* Calls to ioctl(2) eventually end up here. Unhandled ioctls return an ENXIO,
* normally, you would read in the data pointed to by data, then write your
* output to it. The ioctl *should* normally return zero if everything is
* alright, but 3dfx didn't make it that way...
*
* For all of the ioctl code, in the event of a real error,
* we return -Exxxx rather than simply Exxxx. The reason for this
* is that the ioctls actually RET information back to the program
* sometimes, rather than filling it in the passed structure. We
* want to distinguish errors from useful data, and maintain compatibility.
*
* There is this portion of the proc struct called p_retval[], we can store a
* return value in td->td_retval[0] and place the return value if it is positive
* in there, then we can return 0 (good). If the return value is negative, we
* can return -retval and the error should be properly handled.
*/
static int
tdfx_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
int retval = 0;
struct tdfx_pio_data *piod = (struct tdfx_pio_data*)data;
#ifdef DEBUG
printf("IOCTL'd by #%d, cmd: 0x%x, data: %p\n", td->td_proc->p_pid, (u_int32_t)cmd,
piod);
#endif
switch(_IOC_TYPE(cmd)) {
/* Return the real error if negative, or simply stick the valid return
* in td->td_retval */
case 0x33:
/* The '3'(0x33) type IOCTL is for querying the installed cards */
if((retval = tdfx_do_query(cmd, piod)) > 0) td->td_retval[0] = retval;
else return -retval;
break;
case 0:
/* The 0 type IOCTL is for programmed I/O methods */
if((tdfx_do_pio(cmd, piod)) > 0) td->td_retval[0] = retval;
else return -retval;
break;
default:
/* Technically, we won't reach this from linux emu, but when glide
* finally gets ported, watch out! */
#ifdef DEBUG
printf("Bad IOCTL from #%d\n", td->td_proc->p_pid);
#endif
return ENXIO;
}
return 0;
}
/* This is the device driver struct. This is sent to the driver subsystem to
* register the method structure and the info strcut space for this particular
* instance of the driver.
*/
static driver_t tdfx_driver = {
"tdfx",
tdfx_methods,
sizeof(struct tdfx_softc),
};
/* Tell Mr. Kernel about us! */
DRIVER_MODULE(tdfx, pci, tdfx_driver, tdfx_devclass, 0, 0);
MODULE_DEPEND(tdfx, mem, 1, 1, 1);
MODULE_VERSION(tdfx, 1);