PCI register mapping

Question

Hi all,
I have a device as for which I am trying to do a IO_MAPPED driver.
I am doing on my Ultra60 the following code:
size_t memory_size;
for( i=0; i<6; i++ )
ddi_dev_regsize(dip, i, &memory_size);
result = ddi_regs_map_setup(dip, i,
&drx->ioBase.address, 0, mem_size,
&devAttr, &drx->ioBase.handle);
printf("ddi_regs_map_setup(,%d,,,0x%X,,)
returned %d\n", i, mem_size, result );
if (result == DDI_SUCCESS)
ddi_regs_map_free(&drx->ioBase.handle);
On the Ultra60, the reg sizes are:
ddi_regs_map_setup(,0,,,0x0,,) returned 0
ddi_regs_map_setup(,1,,,0x100,,) returned 0
ddi_regs_map_setup(,2,,,0x1000,,) returned -7
ddi_regs_map_setup(,3,,,0x100,,) returned 0
ddi_regs_map_setup(,4,,,0x1000,,) returned -7
ddi_regs_map_setup(,5,,,0x0,,) returned -6
My question is, if I want to map more than 0x200 sized device memory, how do i do it? Because rnumber 1 & 3 will allow me to map registers of sizes 0x100 each only!
or am i understanding this wrong?
any help appreciated!
Thanks!

Answer 1

Hi,
to be a bit more specific:
you shouldnt have to do any direct mapping of addresses yourself. both the register space, AND the io space of a PCI card should be accessible through
ddi_regs_map_setup.
If you download my PCIbase.tar from
http://www.bolthole.com/solaris/#drivers
it will give you a helper script called printregs,
which will show you which register set gets mapped to which address space.
It's always the same,for the same card. So if printregs says that the iospace memory you care about is in register set 3, then you can pretty much always use
ddi_regs_map_setup(dip, 3, ....) to map in that space.