Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

drivers/scsi/ibmvscsi/iseries_vscsi.c

@@ -0,0 +1,144 @@
+/* ------------------------------------------------------------
+ * iSeries_vscsi.c
+ * (C) Copyright IBM Corporation 1994, 2003
+ * Authors: Colin DeVilbiss (devilbis@us.ibm.com)
+ *          Santiago Leon (santil@us.ibm.com)
+ *          Dave Boutcher (sleddog@us.ibm.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
+ * USA
+ *
+ * ------------------------------------------------------------
+ * iSeries-specific functions of the SCSI host adapter for Virtual I/O devices
+ *
+ * This driver allows the Linux SCSI peripheral drivers to directly
+ * access devices in the hosting partition, either on an iSeries
+ * hypervisor system or a converged hypervisor system.
+ */
+
+#include <asm/iSeries/vio.h>
+#include <asm/iSeries/HvLpEvent.h>
+#include <asm/iSeries/HvTypes.h>
+#include <asm/iSeries/HvLpConfig.h>
+#include <asm/vio.h>
+#include <linux/device.h>
+#include "ibmvscsi.h"
+
+/* global variables */
+static struct ibmvscsi_host_data *single_host_data;
+
+/* ------------------------------------------------------------
+ * Routines for direct interpartition interaction
+ */
+struct srp_lp_event {
+	struct HvLpEvent lpevt;	/* 0x00-0x17          */
+	u32 reserved1;		/* 0x18-0x1B; unused  */
+	u16 version;		/* 0x1C-0x1D; unused  */
+	u16 subtype_rc;		/* 0x1E-0x1F; unused  */
+	struct viosrp_crq crq;	/* 0x20-0x3F          */
+};
+
+/** 
+ * standard interface for handling logical partition events.
+ */
+static void ibmvscsi_handle_event(struct HvLpEvent *lpevt)
+{
+	struct srp_lp_event *evt = (struct srp_lp_event *)lpevt;
+
+	if (!evt) {
+		printk(KERN_ERR "ibmvscsi: received null event\n");
+		return;
+	}
+
+	if (single_host_data == NULL) {
+		printk(KERN_ERR
+		       "ibmvscsi: received event, no adapter present\n");
+		return;
+	}
+
+	ibmvscsi_handle_crq(&evt->crq, single_host_data);
+}
+
+/* ------------------------------------------------------------
+ * Routines for driver initialization
+ */
+int ibmvscsi_init_crq_queue(struct crq_queue *queue,
+			    struct ibmvscsi_host_data *hostdata,
+			    int max_requests)
+{
+	int rc;
+
+	single_host_data = hostdata;
+	rc = viopath_open(viopath_hostLp, viomajorsubtype_scsi, 0);
+	if (rc < 0) {
+		printk("viopath_open failed with rc %d in open_event_path\n",
+		       rc);
+		goto viopath_open_failed;
+	}
+
+	rc = vio_setHandler(viomajorsubtype_scsi, ibmvscsi_handle_event);
+	if (rc < 0) {
+		printk("vio_setHandler failed with rc %d in open_event_path\n",
+		       rc);
+		goto vio_setHandler_failed;
+	}
+	return 0;
+
+      vio_setHandler_failed:
+	viopath_close(viopath_hostLp, viomajorsubtype_scsi, max_requests);
+      viopath_open_failed:
+	return -1;
+}
+
+void ibmvscsi_release_crq_queue(struct crq_queue *queue,
+				struct ibmvscsi_host_data *hostdata,
+				int max_requests)
+{
+	vio_clearHandler(viomajorsubtype_scsi);
+	viopath_close(viopath_hostLp, viomajorsubtype_scsi, max_requests);
+}
+
+/**
+ * reset_crq_queue: - resets a crq after a failure
+ * @queue:	crq_queue to initialize and register
+ * @hostdata:	ibmvscsi_host_data of host
+ *
+ * no-op for iSeries
+ */
+void ibmvscsi_reset_crq_queue(struct crq_queue *queue,
+			      struct ibmvscsi_host_data *hostdata)
+{
+}
+
+/**
+ * ibmvscsi_send_crq: - Send a CRQ
+ * @hostdata:	the adapter
+ * @word1:	the first 64 bits of the data
+ * @word2:	the second 64 bits of the data
+ */
+int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata, u64 word1, u64 word2)
+{
+	single_host_data = hostdata;
+	return HvCallEvent_signalLpEventFast(viopath_hostLp,
+					     HvLpEvent_Type_VirtualIo,
+					     viomajorsubtype_scsi,
+					     HvLpEvent_AckInd_NoAck,
+					     HvLpEvent_AckType_ImmediateAck,
+					     viopath_sourceinst(viopath_hostLp),
+					     viopath_targetinst(viopath_hostLp),
+					     0,
+					     VIOVERSION << 16, word1, word2, 0,
+					     0);
+}