Linux-2.6.12-rc2v2.6.12-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");
+