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!

1 files changed, 364 insertions, 0 deletions

diff --git a/drivers/scsi/pluto.c b/drivers/scsi/pluto.c
new file mode 100644
index 000000000000..7bb0a2e56743
--- /dev/null
+++ b/drivers/scsi/pluto.c
@@ -0,0 +1,364 @@
+/* pluto.c: SparcSTORAGE Array SCSI host adapter driver.
+ *
+ * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/config.h>
+#ifdef CONFIG_KMOD
+#include <linux/kmod.h>
+#endif
+
+#include <asm/irq.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "../fc4/fcp_impl.h"
+#include "pluto.h"
+
+#include <linux/module.h>
+
+/* #define PLUTO_DEBUG */
+
+#define pluto_printk printk ("PLUTO %s: ", fc->name); printk
+
+#ifdef PLUTO_DEBUG
+#define PLD(x)  pluto_printk x;
+#define PLND(x) printk ("PLUTO: "); printk x;
+#else
+#define PLD(x)
+#define PLND(x)
+#endif
+
+static struct ctrl_inquiry {
+	struct Scsi_Host host;
+	struct pluto pluto;
+	Scsi_Cmnd cmd;
+	char inquiry[256];
+	fc_channel *fc;
+} *fcs __initdata = { 0 };
+static int fcscount __initdata = 0;
+static atomic_t fcss __initdata = ATOMIC_INIT(0);
+DECLARE_MUTEX_LOCKED(fc_sem);
+
+static int pluto_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);
+
+static void __init pluto_detect_timeout(unsigned long data)
+{
+	PLND(("Timeout\n"))
+	up(&fc_sem);
+}
+
+static void __init pluto_detect_done(Scsi_Cmnd *SCpnt)
+{
+	/* Do nothing */
+}
+
+static void __init pluto_detect_scsi_done(Scsi_Cmnd *SCpnt)
+{
+	SCpnt->request->rq_status = RQ_SCSI_DONE;
+	PLND(("Detect done %08lx\n", (long)SCpnt))
+	if (atomic_dec_and_test (&fcss))
+		up(&fc_sem);
+}
+
+int pluto_slave_configure(Scsi_Device *device)
+{
+	int depth_to_use;
+
+	if (device->tagged_supported)
+		depth_to_use = /* 254 */ 8;
+	else
+		depth_to_use = 2;
+
+	scsi_adjust_queue_depth(device,
+				(device->tagged_supported ?
+				 MSG_SIMPLE_TAG : 0),
+				depth_to_use);
+
+	return 0;
+}
+
+/* Detect all SSAs attached to the machine.
+   To be fast, do it on all online FC channels at the same time. */
+int __init pluto_detect(Scsi_Host_Template *tpnt)
+{
+	int i, retry, nplutos;
+	fc_channel *fc;
+	Scsi_Device dev;
+	struct timer_list fc_timer =
+		TIMER_INITIALIZER(pluto_detect_timeout, 0, 0);
+
+	tpnt->proc_name = "pluto";
+	fcscount = 0;
+	for_each_online_fc_channel(fc) {
+		if (!fc->posmap)
+			fcscount++;
+	}
+	PLND(("%d channels online\n", fcscount))
+	if (!fcscount) {
+#if defined(MODULE) && defined(CONFIG_FC4_SOC_MODULE) && defined(CONFIG_KMOD)
+		request_module("soc");
+		
+		for_each_online_fc_channel(fc) {
+			if (!fc->posmap)
+				fcscount++;
+		}
+		if (!fcscount)
+#endif
+			return 0;
+	}
+	fcs = (struct ctrl_inquiry *) kmalloc (sizeof (struct ctrl_inquiry) * fcscount, GFP_DMA);
+	if (!fcs) {
+		printk ("PLUTO: Not enough memory to probe\n");
+		return 0;
+	}
+	
+	memset (fcs, 0, sizeof (struct ctrl_inquiry) * fcscount);
+	memset (&dev, 0, sizeof(dev));
+	atomic_set (&fcss, fcscount);
+	
+	i = 0;
+	for_each_online_fc_channel(fc) {
+		Scsi_Cmnd *SCpnt;
+		struct Scsi_Host *host;
+		struct pluto *pluto;
+
+		if (i == fcscount) break;
+		if (fc->posmap) continue;
+		
+		PLD(("trying to find SSA\n"))
+
+		/* If this is already registered to some other SCSI host, then it cannot be pluto */
+		if (fc->scsi_name[0]) continue;
+		memcpy (fc->scsi_name, "SSA", 4);
+		
+		fcs[i].fc = fc;
+		
+		fc->can_queue = PLUTO_CAN_QUEUE;
+		fc->rsp_size = 64;
+		fc->encode_addr = pluto_encode_addr;
+		
+		fc->fcp_register(fc, TYPE_SCSI_FCP, 0);
+	
+		SCpnt = &(fcs[i].cmd);
+		host = &(fcs[i].host);
+		pluto = (struct pluto *)host->hostdata;
+		
+		pluto->fc = fc;
+	
+		SCpnt->cmnd[0] = INQUIRY;
+		SCpnt->cmnd[4] = 255;
+		
+		/* FC layer requires this, so that SCpnt->device->tagged_supported is initially 0 */
+		SCpnt->device = &dev;
+		dev.host = host;
+		
+		SCpnt->cmd_len = COMMAND_SIZE(INQUIRY);
+	
+		SCpnt->request->rq_status = RQ_SCSI_BUSY;
+		
+		SCpnt->done = pluto_detect_done;
+		SCpnt->bufflen = 256;
+		SCpnt->buffer = fcs[i].inquiry;
+		SCpnt->request_bufflen = 256;
+		SCpnt->request_buffer = fcs[i].inquiry;
+		PLD(("set up %d %08lx\n", i, (long)SCpnt))
+		i++;
+	}
+	
+	for (retry = 0; retry < 5; retry++) {
+		for (i = 0; i < fcscount; i++) {
+			if (!fcs[i].fc) break;
+			if (fcs[i].cmd.request->rq_status != RQ_SCSI_DONE) {
+				disable_irq(fcs[i].fc->irq);
+				PLND(("queuecommand %d %d\n", retry, i))
+				fcp_scsi_queuecommand (&(fcs[i].cmd), 
+					pluto_detect_scsi_done);
+				enable_irq(fcs[i].fc->irq);
+			}
+		}
+	    
+		fc_timer.expires = jiffies + 10 * HZ;
+		add_timer(&fc_timer);
+		
+		down(&fc_sem);
+		PLND(("Woken up\n"))
+		if (!atomic_read(&fcss))
+			break; /* All fc channels have answered us */
+	}
+	del_timer_sync(&fc_timer);
+
+	PLND(("Finished search\n"))
+	for (i = 0, nplutos = 0; i < fcscount; i++) {
+		Scsi_Cmnd *SCpnt;
+		
+		if (!(fc = fcs[i].fc)) break;
+	
+		SCpnt = &(fcs[i].cmd);
+		
+		/* Let FC mid-level free allocated resources */
+		SCpnt->done (SCpnt);
+		
+		if (!SCpnt->result) {
+			struct pluto_inquiry *inq;
+			struct pluto *pluto;
+			struct Scsi_Host *host;
+			
+			inq = (struct pluto_inquiry *)fcs[i].inquiry;
+
+			if ((inq->dtype & 0x1f) == TYPE_PROCESSOR &&
+			    !strncmp (inq->vendor_id, "SUN", 3) &&
+			    !strncmp (inq->product_id, "SSA", 3)) {
+				char *p;
+				long *ages;
+				
+				ages = kmalloc (((inq->channels + 1) * inq->targets) * sizeof(long), GFP_KERNEL);
+				if (!ages) continue;
+				
+				host = scsi_register (tpnt, sizeof (struct pluto));
+				if(!host)
+				{
+					kfree(ages);
+					continue;
+				}
+				
+				if (!try_module_get(fc->module)) {
+					kfree(ages);
+					scsi_unregister(host);
+					continue;
+				}
+
+				nplutos++;
+				
+				pluto = (struct pluto *)host->hostdata;
+				
+				host->max_id = inq->targets;
+				host->max_channel = inq->channels;
+				host->irq = fc->irq;
+
+				fc->channels = inq->channels + 1;
+				fc->targets = inq->targets;
+				fc->ages = ages;
+				memset (ages, 0, ((inq->channels + 1) * inq->targets) * sizeof(long));
+				
+				pluto->fc = fc;
+				memcpy (pluto->rev_str, inq->revision, 4);
+				pluto->rev_str[4] = 0;
+				p = strchr (pluto->rev_str, ' ');
+				if (p) *p = 0;
+				memcpy (pluto->fw_rev_str, inq->fw_revision, 4);
+				pluto->fw_rev_str[4] = 0;
+				p = strchr (pluto->fw_rev_str, ' ');
+				if (p) *p = 0;
+				memcpy (pluto->serial_str, inq->serial, 12);
+				pluto->serial_str[12] = 0;
+				p = strchr (pluto->serial_str, ' ');
+				if (p) *p = 0;
+				
+				PLD(("Found SSA rev %s fw rev %s serial %s %dx%d\n", pluto->rev_str, pluto->fw_rev_str, pluto->serial_str, host->max_channel, host->max_id))
+			} else
+				fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
+		} else
+			fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
+	}
+	kfree((char *)fcs);
+	if (nplutos)
+		printk ("PLUTO: Total of %d SparcSTORAGE Arrays found\n", nplutos);
+	return nplutos;
+}
+
+int pluto_release(struct Scsi_Host *host)
+{
+	struct pluto *pluto = (struct pluto *)host->hostdata;
+	fc_channel *fc = pluto->fc;
+
+	module_put(fc->module);
+	
+	fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
+	PLND((" releasing pluto.\n"));
+	kfree (fc->ages);
+	PLND(("released pluto!\n"));
+	return 0;
+}
+
+const char *pluto_info(struct Scsi_Host *host)
+{
+	static char buf[128], *p;
+	struct pluto *pluto = (struct pluto *) host->hostdata;
+
+	sprintf(buf, "SUN SparcSTORAGE Array %s fw %s serial %s %dx%d on %s",
+		pluto->rev_str, pluto->fw_rev_str, pluto->serial_str,
+		host->max_channel, host->max_id, pluto->fc->name);
+#ifdef __sparc__
+	p = strchr(buf, 0);
+	sprintf(p, " PROM node %x", pluto->fc->dev->prom_node);
+#endif	
+	return buf;
+}
+
+/* SSA uses this FC4S addressing:
+   switch (addr[0])
+   {
+   case 0: CONTROLLER - All of addr[1]..addr[3] has to be 0
+   case 1: SINGLE DISK - addr[1] channel, addr[2] id, addr[3] 0
+   case 2: DISK GROUP - ???
+   }
+   
+   So that SCSI mid-layer can access to these, we reserve
+   channel 0 id 0 lun 0 for CONTROLLER
+   and channels 1 .. max_channel are normal single disks.
+ */
+static int pluto_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd)
+{
+	PLND(("encode addr %d %d %d\n", SCpnt->device->channel, SCpnt->device->id, SCpnt->cmnd[1] & 0xe0))
+	/* We don't support LUNs - neither does SSA :) */
+	if (SCpnt->cmnd[1] & 0xe0)
+		return -EINVAL;
+	if (!SCpnt->device->channel) {
+		if (SCpnt->device->id)
+			return -EINVAL;
+		memset (addr, 0, 4 * sizeof(u16));
+	} else {
+		addr[0] = 1;
+		addr[1] = SCpnt->device->channel - 1;
+		addr[2] = SCpnt->device->id;
+		addr[3] = 0;
+	}
+	/* We're Point-to-Point, so target it to the default DID */
+	fcmd->did = fc->did;
+	PLND(("trying %04x%04x%04x%04x\n", addr[0], addr[1], addr[2], addr[3]))
+	return 0;
+}
+
+static Scsi_Host_Template driver_template = {
+	.name			= "Sparc Storage Array 100/200",
+	.detect			= pluto_detect,
+	.release		= pluto_release,
+	.info			= pluto_info,
+	.queuecommand		= fcp_scsi_queuecommand,
+	.slave_configure	= pluto_slave_configure,
+	.can_queue		= PLUTO_CAN_QUEUE,
+	.this_id		= -1,
+	.sg_tablesize		= 1,
+	.cmd_per_lun		= 1,
+	.use_clustering		= ENABLE_CLUSTERING,
+	.eh_abort_handler	= fcp_scsi_abort,
+	.eh_device_reset_handler = fcp_scsi_dev_reset,
+	.eh_bus_reset_handler	= fcp_scsi_bus_reset,
+	.eh_host_reset_handler	= fcp_scsi_host_reset,
+};
+
+#include "scsi_module.c"
+
+MODULE_LICENSE("GPL");
+