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path: root/drivers/scsi/pluto.c
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-rw-r--r--drivers/scsi/pluto.c364
1 files changed, 364 insertions, 0 deletions
diff --git a/drivers/scsi/pluto.c b/drivers/scsi/pluto.c
new file mode 100644
index 00000000000..7bb0a2e5674
--- /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");
+
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