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