> I looked into this last year but lost interest. It seems like the DMA buffer
> is being placed past the UVM constraint for DMA ( eg > 4GB).
A configuration buffer is in the softc. It should be allocated to be
dma-reachable.
This driver is quite ugly. Maybe the following diff works?
Index: if_de.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_de.c,v
retrieving revision 1.120
diff -u -p -u -r1.120 if_de.c
--- if_de.c 15 May 2015 11:36:30 -0000 1.120
+++ if_de.c 24 Jun 2015 00:05:05 -0000
@@ -49,6 +49,7 @@
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/timeout.h>
+#include <sys/pool.h>
#include <net/if.h>
#include <net/if_media.h>
@@ -2907,7 +2908,7 @@ tulip_addr_filter(tulip_softc_t * const
* go into hash perfect mode (512 bit multicast
* hash and one perfect hardware).
*/
- bzero(sc->tulip_setupdata, sizeof(sc->tulip_setupdata));
+ bzero(sc->tulip_setupdata, TULIP_SETUP);
if (ac->ac_multirangecnt > 0) {
sc->tulip_flags |= TULIP_ALLMULTI;
sc->tulip_flags &= ~(TULIP_WANTHASHONLY|TULIP_WANTHASHPERFECT);
@@ -4085,8 +4086,7 @@ tulip_txput_setup(tulip_softc_t * const
sc->tulip_if.if_start = tulip_ifstart;
return;
}
- bcopy(sc->tulip_setupdata, sc->tulip_setupbuf,
- sizeof(sc->tulip_setupbuf));
+ bcopy(sc->tulip_setupdata, sc->tulip_setupbuf, TULIP_SETUP);
/*
* Clear WANTSETUP and set DOINGSETUP. Set know that WANTSETUP is
* set and DOINGSETUP is clear doing an XOR of the two will DTRT.
@@ -4357,16 +4357,17 @@ tulip_busdma_init(tulip_softc_t * const
{
int error = 0;
+ sc->tulip_setupbuf = dma_alloc(TULIP_SETUP, PR_WAITOK);
+ sc->tulip_setupdata = malloc(TULIP_SETUP, M_DEVBUF, M_WAITOK);
+
/*
* Allocate dmamap for setup descriptor
*/
error = bus_dmamap_create(sc->tulip_dmatag, sizeof(sc->tulip_setupbuf), 2,
- sizeof(sc->tulip_setupbuf), 0, BUS_DMA_NOWAIT,
- &sc->tulip_setupmap);
+ TULIP_SETUP, 0, BUS_DMA_NOWAIT, &sc->tulip_setupmap);
if (error == 0) {
error = bus_dmamap_load(sc->tulip_dmatag, sc->tulip_setupmap,
- sc->tulip_setupbuf, sizeof(sc->tulip_setupbuf),
- NULL, BUS_DMA_NOWAIT);
+ sc->tulip_setupbuf, TULIP_SETUP, NULL, BUS_DMA_NOWAIT);
if (error)
bus_dmamap_destroy(sc->tulip_dmatag, sc->tulip_setupmap);
}
Index: if_devar.h
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_devar.h,v
retrieving revision 1.33
diff -u -p -u -r1.33 if_devar.h
--- if_devar.h 10 Feb 2015 03:51:58 -0000 1.33
+++ if_devar.h 24 Jun 2015 00:04:36 -0000
@@ -600,8 +600,10 @@ struct _tulip_softc_t {
* one is the one being sent while the other is the one being
* filled.
*/
- u_int32_t tulip_setupbuf[192/sizeof(u_int32_t)];
- u_int32_t tulip_setupdata[192/sizeof(u_int32_t)];
+#define TULIP_SETUP (192 / sizeof(u_int32_t))
+ u_int32_t *tulip_setupbuf;
+ u_int32_t *tulip_setupdata;
+
char tulip_boardid[16]; /* buffer for board ID */
u_int8_t tulip_rombuf[128];
struct device *tulip_pci_busno; /* needed for multiport boards */
