On 2002.05.03 04:13 Peter Andersson wrote:
> ...
>
> I have just downloaded and installed the latest cvs source (i assume
> that you have applied the patch), at least i thought so when comparing
> the patch with the "would be patched files" (mach64_drv.h and
> mach64_state.c). But i might be mistaken as i am not very knowledgeable
> about these things, as you know :) . The outcome is the same as before
> i´m afraid. What i mean is i still get the "Error flushing vertex
> buffer: return = -16" when running glxgears. A strange thing is that i
> can run the doom clone (prboom) for a while, when it either crashes with
> the same message or completley hangs my computer. I wish i could have
> more "happy" news.
>
> Peter
Peter, this is a regression. There may be two causes for this:
a) The use of readl/writel somehow poses even further problems.
b) Recent changes on the CVS broke PowerPC. It may be just the
wait_for_{idle,fifo} already failed before, but it passed unoticed before
the recentely added checks.
The only way to figure this out is to reverse the use of the readl/writel
macros and see if this changes anything. So Peter, in mach64_drv.h,
instead of:
#define MACH64_READ(reg) readl(MACH64_ADDR(reg))
#define MACH64_WRITE(reg,val) writel((val), MACH64_ADDR(reg))
put back:
#define MACH64_DEREF(reg) *(volatile u32 *)MACH64_ADDR(reg)
#define MACH64_READ(reg) le32_to_cpu(MACH64_DEREF(reg))
#define MACH64_WRITE(reg,val) do { MACH64_DEREF(reg) =
cpu_to_le32(val); } while (0)
(note that each definition takes a whole line, just in case it gets broken
by the mailer)
and check both with MACH64_USE_DMA set to 1 and 0. To be sure that
everything is recompiled do,
make -f Makefile.linux clean mach64.o
Don't forget to install the kernel and be sure the previous is removed
from memory.
José Fonseca
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