/* 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> #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 RQ_SCSI_BUSY 0xffff #define RQ_SCSI_DONE 0xfffe /* #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; 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) { PLND(("Detect done %08lx\n", (long)SCpnt)) if (atomic_dec_and_test (&fcss)) up(&fc_sem); } int pluto_slave_configure(struct 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(struct scsi_host_template *tpnt) { int i, retry, nplutos; fc_channel *fc; struct scsi_device dev; DEFINE_TIMER(fc_timer, 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 = 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->cmd_flags &= ~REQ_STARTED; SCpnt->done = pluto_detect_done; 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->cmd_flags & REQ_STARTED)) { fcs[i].cmd.request->cmd_flags |= REQ_STARTED; 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 struct 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_host_reset_handler = fcp_scsi_host_reset, }; #include "scsi_module.c" MODULE_LICENSE("GPL");