Make the maximum number of pages for external mbufs configurable in

the kernel environment and accessible as a RO sysctl.

Explain that the HE155 will not work in 64-bit/66MHz slots, but may work
in 64-bit/33MHz slots.

3 files changed, 7 insertions, 2 deletions

diff --git a/sys/dev/hatm/if_hatm.c b/sys/dev/hatm/if_hatm.c
index 24a0488..d2c1222 100644
--- a/sys/dev/hatm/if_hatm.c
+++ b/sys/dev/hatm/if_hatm.c
@@ -329,7 +329,7 @@ static void
 hatm_init_smbufs(struct hatm_softc *sc)
 {
 	sc->mbuf_pages = malloc(sizeof(sc->mbuf_pages[0]) *
-	    HE_CONFIG_MAX_MBUF_PAGES, M_DEVBUF, M_WAITOK);
+	    sc->mbuf_max_pages, M_DEVBUF, M_WAITOK);
 	sc->mbuf_npages = 0;
 }
 
@@ -1388,6 +1388,10 @@ hatm_configure(struct hatm_softc *sc)
 	kenv_getuint(sc, "tpdmax", &sc->max_tpd,
 	    HE_CONFIG_TPD_MAXCC, 0);
 
+	/* external mbuf pages */
+	kenv_getuint(sc, "max_mbuf_pages", &sc->mbuf_max_pages,
+	    HE_CONFIG_MAX_MBUF_PAGES, 0);
+
 	return (0);
 }
 
diff --git a/sys/dev/hatm/if_hatm_intr.c b/sys/dev/hatm/if_hatm_intr.c
index b359ecb..088eef4 100644
--- a/sys/dev/hatm/if_hatm_intr.c
+++ b/sys/dev/hatm/if_hatm_intr.c
@@ -175,7 +175,7 @@ hatm_mbuf_page_alloc(struct hatm_softc *sc, u_int group)
 	int err;
 	u_int i;
 
-	if (sc->mbuf_npages == HE_CONFIG_MAX_MBUF_PAGES)
+	if (sc->mbuf_npages == sc->mbuf_max_pages))
 		return;
 	if ((pg = malloc(MBUF_ALLOC_SIZE, M_DEVBUF, M_NOWAIT)) == NULL)
 		return;
diff --git a/sys/dev/hatm/if_hatmvar.h b/sys/dev/hatm/if_hatmvar.h
index 2f4bfc2..ed1566a 100644
--- a/sys/dev/hatm/if_hatmvar.h
+++ b/sys/dev/hatm/if_hatmvar.h
@@ -422,6 +422,7 @@ struct hatm_softc {
 	bus_dma_tag_t		mbuf_tag;
 	struct mbuf_page	**mbuf_pages;
 	u_int			mbuf_npages;
+	u_int			mbuf_max_pages;
 	struct mbufx_free	*mbuf_list[2];
 
 	/* mbuf cluster tracking and mapping for group 0 */