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/*
* Copyright (c) 2008 Owain G. Ainsworth <oga@nicotinebsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "drm.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/vga_pcivar.h>
#if NDRM > 0
int
vga_drmsubmatch(struct device *parent, void *match, void *aux)
{
struct cfdata *cf = match;
struct cfdriver *cd;
size_t len = 0;
char *sm;
cd = cf->cf_driver;
/* is this a *drm device? */
len = strlen(cd->cd_name);
sm = cd->cd_name + len - 3;
if (strncmp(sm, "drm", 3) == 0)
return ((*cf->cf_attach->ca_match)(parent, match, aux));
return (0);
}
#endif
/*
* Prepare dev->bars to be used for information. we do this at startup
* so we can do the whole array at once, dealing with 64-bit BARs correctly.
*/
void
vga_pci_bar_init(struct vga_pci_softc *dev, struct pci_attach_args *pa)
{
pcireg_t type;
int addr = PCI_MAPREG_START, i = 0;
memcpy(&dev->pa, pa, sizeof(dev->pa));
while (i < VGA_PCI_MAX_BARS) {
dev->bars[i] = malloc(sizeof((*dev->bars[i])), M_DEVBUF,
M_NOWAIT | M_ZERO);
if (dev->bars[i] == NULL) {
return;
}
dev->bars[i]->addr = addr;
type = dev->bars[i]->maptype = pci_mapreg_type(pa->pa_pc,
pa->pa_tag, addr);
if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, addr,
dev->bars[i]->maptype, &dev->bars[i]->base,
&dev->bars[i]->maxsize, &dev->bars[i]->flags) != 0) {
free(dev->bars[i], M_DEVBUF);
dev->bars[i] = NULL;
}
if (type == PCI_MAPREG_MEM_TYPE_64BIT) {
addr += 8;
i += 2;
} else {
addr += 4;
i++;
}
}
}
/*
* Get the vga_pci_bar struct for the address in question. returns NULL if
* invalid BAR is passed.
*/
struct vga_pci_bar*
vga_pci_bar_info(struct vga_pci_softc *dev, int no)
{
if (dev == NULL || no >= VGA_PCI_MAX_BARS)
return (NULL);
return (dev->bars[no]);
}
/*
* map the BAR in question, returning the vga_pci_bar struct in case any more
* processing needs to be done. Returns NULL on failure. Can be called multiple
* times.
*/
struct vga_pci_bar*
vga_pci_bar_map(struct vga_pci_softc *dev, int addr, bus_size_t size,
int busflags)
{
struct vga_pci_bar *bar = NULL;
int i;
if (dev == NULL)
return (NULL);
for (i = 0; i < VGA_PCI_MAX_BARS; i++) {
if (dev->bars[i] && dev->bars[i]->addr == addr) {
bar = dev->bars[i];
break;
}
}
if (bar == NULL) {
printf("vga_pci_bar_map: given invalid address 0x%x\n", addr);
return (NULL);
}
if (bar->mapped == 0) {
if (pci_mapreg_map(&dev->pa, bar->addr, bar->maptype,
bar->flags | busflags, &bar->bst, &bar->bsh, NULL,
&bar->size, size)) {
printf("vga_pci_bar_map: can't map bar 0x%x\n", addr);
return (NULL);
}
}
bar->mapped++;
return (bar);
}
/*
* "unmap" the BAR referred to by argument. If more than one place has mapped it
* we just decrement the reference counter so nothing untoward happens.
*/
void
vga_pci_bar_unmap(struct vga_pci_bar *bar)
{
if (bar != NULL && bar->mapped != 0) {
if (--bar->mapped == 0)
bus_space_unmap(bar->bst, bar->bsh, bar->size);
}
}
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