diff options
| -rw-r--r-- | sys/i386/isa/bt742a.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/sys/i386/isa/bt742a.c b/sys/i386/isa/bt742a.c index 8ab3c56..a092cea 100644 --- a/sys/i386/isa/bt742a.c +++ b/sys/i386/isa/bt742a.c @@ -12,7 +12,7 @@ * on the understanding that TFS is not responsible for the correct * functioning of this software in any circumstances. * - * $Id: bt742a.c,v 1.43 1995/11/04 17:07:08 bde Exp $ + * $Id: bt742a.c,v 1.44 1995/12/06 23:50:06 bde Exp $ */ /* @@ -382,6 +382,7 @@ struct bt_data { int bt_dma; /* DMA channel read of board */ int bt_scsi_dev; /* adapters scsi id */ int numccbs; /* how many we have malloc'd */ + int bt_bounce; /* should we bounce? */ struct scsi_link sc_link; /* prototype for devs */ } *btdata[NBT]; @@ -702,7 +703,7 @@ btattach(dev) bt->sc_link.adapter_targ = bt->bt_scsi_dev; bt->sc_link.adapter = &bt_switch; bt->sc_link.device = &bt_dev; - bt->sc_link.flags = SDEV_BOUNCE; + bt->sc_link.flags = bt->bt_bounce ? SDEV_BOUNCE : 0; /* * Prepare the scsibus_data area for the upperlevel @@ -1173,15 +1174,21 @@ bt_init(unit) return (ENXIO); break; } - if ( binfo.id[0] == '5' ) { + if ( binfo.id[0] == '4' && binfo.id[1] == '4' && binfo.id[2] == '5' && + binfo.id[3] == 'S' ) { + printf("bt%d: Your card cannot DMA above 16MB boundary. Bounce buffering enabled.\n", unit); + bt->bt_bounce++; + } else if ( binfo.id[0] == '5' ) { printf("bt%d: This driver is designed for using 32 bit addressing\n",unit); printf("bt%d: mode firmware and EISA/PCI/VLB bus architectures\n",unit); printf("bt%d: Bounce-buffering will be used (and is necessary)\n", unit); printf("bt%d: if you have more than 16MBytes memory.\n",unit); + bt->bt_bounce++; } else if ( info.bus_type == BT_BUS_TYPE_24bit ) { printf("bt%d: Your board should report a 32bit bus architecture type..\n",unit); printf("bt%d: The firmware on your board may have a problem with over\n",unit); printf("bt%d: 16MBytes memory handling with this driver.\n",unit); + bt->bt_bounce++; } /* |
