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;
}
int
drm_mtrr_add(unsigned long offset, unsigned long size, unsigned int flags)
{
int act;
struct mem_range_desc mrdesc;
mrdesc.mr_base = offset;
mrdesc.mr_len = size;
mrdesc.mr_flags = flags;
act = MEMRANGE_SET_UPDATE;
strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
return (-mem_range_attr_set(&mrdesc, &act));
}
int
drm_mtrr_del(int __unused handle, unsigned long offset, size_t size, int flags)
{
int act;
struct mem_range_desc mrdesc;
mrdesc.mr_base = offset;
mrdesc.mr_len = size;
mrdesc.mr_flags = flags;
act = MEMRANGE_SET_REMOVE;
strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
return mem_range_attr_set(&mrdesc, &act);
}
/*
* Operations for changing memory attributes.
*
* This is basically just an ioctl shim for mem_range_attr_get
* and mem_range_attr_set.
*/
static int
mmioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td)
{
int nd, error = 0;
struct mem_range_op *mo = (struct mem_range_op *)data;
struct mem_range_desc *md;
/* is this for us? */
if ((cmd != MEMRANGE_GET) &&
(cmd != MEMRANGE_SET))
return (ENOTTY);
/* any chance we can handle this? */
if (mem_range_softc.mr_op == NULL)
return (EOPNOTSUPP);
/* do we have any descriptors? */
if (mem_range_softc.mr_ndesc == 0)
return (ENXIO);
switch (cmd) {
case MEMRANGE_GET:
nd = imin(mo->mo_arg[0], mem_range_softc.mr_ndesc);
if (nd > 0) {
md = (struct mem_range_desc *)
malloc(nd * sizeof(struct mem_range_desc),
M_MEMDESC, M_WAITOK);
error = mem_range_attr_get(md, &nd);
if (!error)
error = copyout(md, mo->mo_desc,
nd * sizeof(struct mem_range_desc));
free(md, M_MEMDESC);
}
else
nd = mem_range_softc.mr_ndesc;
mo->mo_arg[0] = nd;
break;
case MEMRANGE_SET:
md = (struct mem_range_desc *)malloc(sizeof(struct mem_range_desc),
M_MEMDESC, M_WAITOK);
error = copyin(mo->mo_desc, md, sizeof(struct mem_range_desc));
/* clamp description string */
md->mr_owner[sizeof(md->mr_owner) - 1] = 0;
if (error == 0)
error = mem_range_attr_set(md, &mo->mo_arg[0]);
free(md, M_MEMDESC);
break;
}
return (error);
}
int
drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags)
{
#ifndef DRM_NO_MTRR
int act;
struct mem_range_desc mrdesc;
mrdesc.mr_base = offset;
mrdesc.mr_len = size;
mrdesc.mr_flags = flags;
act = MEMRANGE_SET_REMOVE;
strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
return mem_range_attr_set(&mrdesc, &act);
#else
return 0;
#endif
}
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;
}
