pull in atascsi, a scsi to ata translation layer, so i can work on it in

tree. ive lost two large changes today thanks to my own stupidity which
could have been avoided if they were in the tree.

discussed with deraadt@

ok jsg@ grange@ an older version was ok marco@

3 files changed, 197 insertions, 1 deletions

diff --git a/sys/dev/ata/atascsi.c b/sys/dev/ata/atascsi.c
new file mode 100644
index 00000000000..9ec35e2ff9d
--- /dev/null
+++ b/sys/dev/ata/atascsi.c
@@ -0,0 +1,134 @@
+/*	$OpenBSD: atascsi.c,v 1.1 2007/02/19 11:44:24 dlg Exp $ */
+
+/*
+ * Copyright (c) 2007 David Gwynne <dlg@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/buf.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/device.h>
+#include <sys/proc.h>
+#include <sys/queue.h>
+
+#include <scsi/scsi_all.h>
+#include <scsi/scsiconf.h>
+
+#include <dev/ata/atascsi.h>
+
+struct atascsi {
+	struct device		*ab_dev;
+	void			*ab_cookie;
+
+	int			*ab_ports;
+
+	struct atascsi_methods	*ab_methods;
+	struct scsi_adapter	ab_switch;
+	struct scsi_link	ab_link;
+	struct scsibus_softc	*ab_scsibus;
+};
+
+int		atascsi_probe(struct atascsi *, int);
+
+int		atascsi_cmd(struct scsi_xfer *);
+
+/* template */
+struct scsi_adapter atascsi_switch = {
+	atascsi_cmd,		/* scsi_cmd */
+	minphys,		/* scsi_minphys */
+	NULL,
+	NULL,
+	NULL			/* ioctl */
+};
+
+struct scsi_device atascsi_device = {
+	NULL, NULL, NULL, NULL
+};
+
+struct atascsi *
+atascsi_attach(struct device *self, struct atascsi_attach_args *aaa)
+{
+	struct scsibus_attach_args	saa;
+	struct atascsi			*ab;
+	int				i;
+
+	ab = malloc(sizeof(struct atascsi), M_DEVBUF, M_WAITOK);
+	bzero(ab, sizeof(struct atascsi));
+
+	ab->ab_dev = self;
+	ab->ab_cookie = aaa->aaa_cookie;
+	ab->ab_methods = aaa->aaa_methods;
+
+	/* copy from template and modify for ourselves */
+	ab->ab_switch = atascsi_switch;
+	ab->ab_switch.scsi_minphys = aaa->aaa_minphys;
+
+	/* fill in our scsi_link */
+	ab->ab_link.device = &atascsi_device;
+	ab->ab_link.adapter = &ab->ab_switch;
+	ab->ab_link.adapter_softc = ab;
+	ab->ab_link.adapter_buswidth = aaa->aaa_nports;
+	ab->ab_link.luns = 1; /* XXX port multiplier as luns */
+	ab->ab_link.adapter_target = aaa->aaa_nports;
+	ab->ab_link.openings = aaa->aaa_ncmds;
+
+	ab->ab_ports = malloc(sizeof(int) * aaa->aaa_nports,
+	    M_DEVBUF, M_WAITOK);
+	bzero(ab->ab_ports, sizeof(int) * aaa->aaa_nports);
+
+	/* fill in the port array with the type of devices there */
+	for (i = 0; i < ab->ab_link.adapter_buswidth; i++)
+		atascsi_probe(ab, i);
+
+	bzero(&saa, sizeof(saa));
+	saa.saa_sc_link = &ab->ab_link;
+
+	/* stash the scsibus so we can do hotplug on it */
+	ab->ab_scsibus = (struct scsibus_softc *)config_found(self, &saa,
+            scsiprint);
+
+	return (ab);
+}
+
+int
+atascsi_detach(struct atascsi *ab)
+{
+	return (0);
+}
+
+int
+atascsi_probe(struct atascsi *ab, int port)
+{
+	if (port > ab->ab_link.adapter_buswidth)
+		return (ENXIO);
+
+	ab->ab_ports[port] = ab->ab_methods->probe(ab->ab_cookie, port);
+
+	return (0);
+}
+
+int
+atascsi_cmd(struct scsi_xfer *xs)
+{
+	int			s;
+
+	xs->error = XS_DRIVER_STUFFUP;
+	s = splbio();
+	scsi_done(xs);
+	splx(s);
+	return (COMPLETE);
+}
diff --git a/sys/dev/ata/atascsi.h b/sys/dev/ata/atascsi.h
new file mode 100644
index 00000000000..6f80cc4c547
--- /dev/null
+++ b/sys/dev/ata/atascsi.h
@@ -0,0 +1,60 @@
+/*	$OpenBSD: atascsi.h,v 1.1 2007/02/19 11:44:24 dlg Exp $ */
+
+/*
+ * Copyright (c) 2007 David Gwynne <dlg@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+struct atascsi;
+struct ata_xfer;
+
+struct atascsi_methods {
+	int			(*probe)(void *, int);
+	int			(*ata_cmd)(void *, struct ata_xfer *);
+};
+
+struct atascsi_attach_args {
+	void			*aaa_cookie;
+
+	struct atascsi_methods	*aaa_methods;
+	void			(*aaa_minphys)(struct buf *);
+	int			aaa_nports;
+	int			aaa_ncmds;
+};
+
+struct atascsi_port {
+	int			ap_type;
+#define ATABUS_PORT_T_NONE		0
+#define ATABUS_PORT_T_DISK		1
+#define ATABUS_PORT_T_ATAPI		2
+};
+
+struct ata_xfer {
+	int			port;
+
+	int			flags;
+#define ATA_F_POLL		(1<<0)
+#define ATA_F_NOSLEEP		(1<<1)
+
+	u_int8_t		*cmd;
+
+	u_int8_t		*data;
+	size_t			datalen;
+};
+
+struct atascsi	*atascsi_attach(struct device *, struct atascsi_attach_args *);
+int		atascsi_detach(struct atascsi *);
+
+int		atascsi_probe_dev(struct atascsi *, int);
+int		atascsi_detach_dev(struct atascsi *, int);
diff --git a/sys/dev/ata/files.ata b/sys/dev/ata/files.ata
index cf010e3131d..3adc4c4b8f9 100644
--- a/sys/dev/ata/files.ata
+++ b/sys/dev/ata/files.ata
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.ata,v 1.2 2002/12/23 02:37:38 grange Exp $
+#	$OpenBSD: files.ata,v 1.3 2007/02/19 11:44:24 dlg Exp $
 #	$NetBSD: files.ata,v 1.3 1998/10/12 16:09:16 bouyer Exp $
 #
 # Config file and device description for machine-independent devices
@@ -13,3 +13,5 @@ file	dev/ata/wd.c				wd needs-flag
 file	dev/ata/ata_wdc.c			wd & wdc_base
 
 file	dev/ata/ata.c				(ata | atapi) & wdc_base
+
+file	dev/ata/atascsi.c			atascsi