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Code Issues Releases Activity

PCI fix for XLR C revision chips, limit DMA address to the first 2GB

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physical address.  Adds a dma tag to the XLR/XLS pci bus with the
lowaddr if the CPU happens to be a XLR C rev.

Submitted by:	Sreekanth M. S. (kanthms at netlogicmicro dot com))
This commit is contained in:
Jayachandran C. 2010-10-06 15:37:55 +00:00
parent 4893384c12
commit 8d4380adbf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=213484
2 changed files with 53 additions and 2 deletions
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29
sys/mips/rmi/board.h
View File

@ -116,6 +116,35 @@ xlr_processor_id(void)
return ((mips_rd_prid() & 0xff00) >> 8);
}
/*
* The processor is XLR and C-Series
*/
static __inline unsigned int
xlr_is_c_revision(void)
{
int processor_id = xlr_processor_id();
int revision_id = xlr_revision();
switch (processor_id) {
/*
* These are the relevant PIDs for XLR
* steppings (hawk and above). For these,
* PIDs, Rev-Ids of [5-9] indicate 'C'.
*/
case RMI_CHIP_XLR308_C:
case RMI_CHIP_XLR508_C:
case RMI_CHIP_XLR516_C:
case RMI_CHIP_XLR532_C:
case RMI_CHIP_XLR716:
case RMI_CHIP_XLR732:
if (revision_id >= 5 && revision_id <= 9)
return (1);
default:
return (0);
}
return (0);
}
/*
* RMI Engineering boards which are PCI cards
* These should come up in PCI device mode (not yet)

26
sys/mips/rmi/xlr_pci.c
View File

@ -113,7 +113,7 @@ __FBSDID("$FreeBSD$");
#endif
struct xlr_pcib_softc {
int junk; /* no softc */
bus_dma_tag_t sc_pci_dmat; /* PCI DMA tag pointer */
};
static devclass_t pcib_devclass;
@ -300,7 +300,19 @@ xlr_pcib_write_config(device_t dev, u_int b, u_int s, u_int f,
static int
xlr_pcib_attach(device_t dev)
{
struct xlr_pcib_softc *sc;
sc = device_get_softc(dev);
/*
* XLR C revision chips cannot do DMA above 2G physical address
* create a parent tag with this lowaddr
*/
if (xlr_is_c_revision()) {
if (bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
0x7fffffff, ~0, NULL, NULL, 0x7fffffff,
0xff, 0x7fffffff, 0, NULL, NULL, &sc->sc_pci_dmat) != 0)
panic("%s: bus_dma_tag_create failed", __func__);
}
device_add_child(dev, "pci", 0);
bus_generic_attach(dev);
return (0);
@ -566,6 +578,15 @@ xlr_pci_release_resource(device_t bus, device_t child, int type, int rid,
return (rman_release_resource(r));
}
static bus_dma_tag_t
xlr_pci_get_dma_tag(device_t bus, device_t child)
{
struct xlr_pcib_softc *sc;
sc = device_get_softc(bus);
return (sc->sc_pci_dmat);
}
static int
xlr_pci_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
@ -618,6 +639,7 @@ static device_method_t xlr_pcib_methods[] = {
DEVMETHOD(bus_write_ivar, xlr_pcib_write_ivar),
DEVMETHOD(bus_alloc_resource, xlr_pci_alloc_resource),
DEVMETHOD(bus_release_resource, xlr_pci_release_resource),
DEVMETHOD(bus_get_dma_tag, xlr_pci_get_dma_tag),
DEVMETHOD(bus_activate_resource, xlr_pci_activate_resource),
DEVMETHOD(bus_deactivate_resource, xlr_pci_deactivate_resource),
DEVMETHOD(bus_setup_intr, mips_platform_pci_setup_intr),