pluto.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:8k
- /* 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/blk.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 "hosts.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(("Timeoutn"))
- 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 %08lxn", (long)SCpnt))
- if (atomic_dec_and_test (&fcss))
- up(&fc_sem);
- }
- static void pluto_select_queue_depths(struct Scsi_Host *host, Scsi_Device *devlist)
- {
- Scsi_Device *device;
-
- for (device = devlist; device; device = device->next) {
- if (device->host != host) continue;
- if (device->tagged_supported)
- device->queue_depth = /* 254 */ 8;
- else
- device->queue_depth = 2;
- }
- }
- /* 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 = { function: pluto_detect_timeout };
- tpnt->proc_name = "pluto";
- fcscount = 0;
- for_each_online_fc_channel(fc) {
- if (!fc->posmap)
- fcscount++;
- }
- PLND(("%d channels onlinen", 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 proben");
- 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 SSAn"))
- /* 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->host = host;
- SCpnt->cmnd[0] = INQUIRY;
- SCpnt->cmnd[4] = 255;
-
- /* FC layer requires this, so that SCpnt->device->tagged_supported is initially 0 */
- SCpnt->device = &dev;
-
- 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 %08lxn", 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 %dn", 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 upn"))
- if (!atomic_read(&fcss))
- break; /* All fc channels have answered us */
- }
- del_timer_sync(&fc_timer);
- PLND(("Finished searchn"))
- 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;
- }
-
- nplutos++;
-
- if (fc->module) __MOD_INC_USE_COUNT(fc->module);
-
- pluto = (struct pluto *)host->hostdata;
-
- host->max_id = inq->targets;
- host->max_channel = inq->channels;
- host->irq = fc->irq;
- #ifdef __sparc_v9__
- host->unchecked_isa_dma = 1;
- #endif
- host->select_queue_depths = pluto_select_queue_depths;
- 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%dn", 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 foundn", nplutos);
- return nplutos;
- }
- int pluto_release(struct Scsi_Host *host)
- {
- struct pluto *pluto = (struct pluto *)host->hostdata;
- fc_channel *fc = pluto->fc;
- if (fc->module) __MOD_DEC_USE_COUNT(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 %dn", SCpnt->channel, SCpnt->target, SCpnt->cmnd[1] & 0xe0))
- /* We don't support LUNs - neither does SSA :) */
- if (SCpnt->cmnd[1] & 0xe0) return -EINVAL;
- if (!SCpnt->channel) {
- if (SCpnt->target) return -EINVAL;
- memset (addr, 0, 4 * sizeof(u16));
- } else {
- addr[0] = 1;
- addr[1] = SCpnt->channel - 1;
- addr[2] = SCpnt->target;
- addr[3] = 0;
- }
- /* We're Point-to-Point, so target it to the default DID */
- fcmd->did = fc->did;
- PLND(("trying %04x%04x%04x%04xn", addr[0], addr[1], addr[2], addr[3]))
- return 0;
- }
- static Scsi_Host_Template driver_template = PLUTO;
- #include "scsi_module.c"
- EXPORT_NO_SYMBOLS;