Re: Inspiron 9400 freezes when enabling bfe0

["Sepherosa Ziehau" <sepherosa@xxxxxxxxx>]

On 7/13/07, Jörg Anslik <joerg@anslik.de> wrote:
> Hi Sephe,
>
> your fix for the bfe network interface does the trick...almost! :-)
>
> I can now access /dev/bfe0 without causing the machine to freeze, but
> unfortunately, there's no way to communicate over the network; the
> system displays "bfe0: bfe_encap bus_dmamap_load failed: 36" error
> messages when the interface is ifconfig'd UP or dhclient is started.
>
> Anyway, I believe it's true the bfe driver has some serious problems
> with machines that have >1GB of RAM -- your fix proves that.
>
> And unless you have a fix for the bus_dmamap_load issue described
> above at hand, I'll further investigate.

Please apply the attached patch too.  Looks like bounce pages are not
allocated at all.

Best Regards,
sephe

--
Live Free or Die

--- busdma_machdep.c.orig	2007-07-13 12:07:26.073968370 +0800
+++ busdma_machdep.c	2007-07-13 12:06:18.324898557 +0800
@@ -45,7 +45,7 @@
 
 #include <machine/md_var.h>
 
-#define MAX_BPAGES 128
+#define MAX_BPAGES 1024
 
 struct bus_dma_tag {
 	bus_dma_tag_t	  parent;
@@ -289,9 +289,12 @@ bus_dmamap_create(bus_dma_tag_t dmat, in
 				panic("bus_dmamap_create: page reallocation "
 				      "not implemented");
 			}
-			pages = atop(dmat->maxsize);
+
+			pages = MAX(atop(dmat->maxsize), 1);
 			pages = MIN(maxpages - total_bpages, pages);
-			error = alloc_bounce_pages(dmat, pages);
+			pages = MAX(pages, 1);
+			if (alloc_bounce_pages(dmat, pages) < pages)
+				error = ENOMEM;
 
 			if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0) {
 				if (error == 0)