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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/pluto.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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!
Diffstat (limited to 'drivers/scsi/pluto.c')
-rw-r--r-- | drivers/scsi/pluto.c | 364 |
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"); + |