diff options
Diffstat (limited to 'drivers/scsi/fcal.c')
| -rw-r--r-- | drivers/scsi/fcal.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/drivers/scsi/fcal.c b/drivers/scsi/fcal.c new file mode 100644 index 000000000000..0dad89d4cb3e --- /dev/null +++ b/drivers/scsi/fcal.c @@ -0,0 +1,320 @@ +/* fcal.c: Fibre Channel Arbitrated Loop SCSI host adapter driver. + * + * Copyright (C) 1998,1999 Jakub Jelinek (jj@ultra.linux.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 "fcal.h" + +#include <linux/module.h> + +/* #define FCAL_DEBUG */ + +#define fcal_printk printk ("FCAL %s: ", fc->name); printk + +#ifdef FCAL_DEBUG +#define FCALD(x) fcal_printk x; +#define FCALND(x) printk ("FCAL: "); printk x; +#else +#define FCALD(x) +#define FCALND(x) +#endif + +static unsigned char alpa2target[] = { +0x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79, +0x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72, +0xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff, +0xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff, +0xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff, +0xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff, +0xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff, +0xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff, +0x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33, +0x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c, +0xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff, +0xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff, +0xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff, +0xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff, +0x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 +}; + +static unsigned char target2alpa[] = { +0xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce, +0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3, +0xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b, +0x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73, +0x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56, +0x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c, +0x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26, +0x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00 +}; + +static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd); + +int fcal_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 FC Arbitrated Loops attached to the machine. + fc4 module has done all the work for us... */ +int __init fcal_detect(Scsi_Host_Template *tpnt) +{ + int nfcals = 0; + fc_channel *fc; + int fcalcount; + int i; + + tpnt->proc_name = "fcal"; + fcalcount = 0; + for_each_online_fc_channel(fc) + if (fc->posmap) + fcalcount++; + FCALND(("%d channels online\n", fcalcount)) + if (!fcalcount) { +#if defined(MODULE) && defined(CONFIG_FC4_SOCAL_MODULE) && defined(CONFIG_KMOD) + request_module("socal"); + + for_each_online_fc_channel(fc) + if (fc->posmap) + fcalcount++; + if (!fcalcount) +#endif + return 0; + } + for_each_online_fc_channel(fc) { + struct Scsi_Host *host; + long *ages; + struct fcal *fcal; + + if (!fc->posmap) continue; + + /* Strange, this is already registered to some other SCSI host, then it cannot be fcal */ + if (fc->scsi_name[0]) continue; + memcpy (fc->scsi_name, "FCAL", 4); + + fc->can_queue = FCAL_CAN_QUEUE; + fc->rsp_size = 64; + fc->encode_addr = fcal_encode_addr; + + ages = kmalloc (128 * sizeof(long), GFP_KERNEL); + if (!ages) continue; + + host = scsi_register (tpnt, sizeof (struct fcal)); + if (!host) + { + kfree(ages); + continue; + } + + if (!try_module_get(fc->module)) { + kfree(ages); + scsi_unregister(host); + continue; + } + + nfcals++; + + fcal = (struct fcal *)host->hostdata; + + fc->fcp_register(fc, TYPE_SCSI_FCP, 0); + + for (i = 0; i < fc->posmap->len; i++) { + int status, target, alpa; + + alpa = fc->posmap->list[i]; + FCALD(("Sending PLOGI to %02x\n", alpa)) + target = alpa2target[alpa]; + status = fc_do_plogi(fc, alpa, fcal->node_wwn + target, + fcal->nport_wwn + target); + FCALD(("PLOGI returned with status %d\n", status)) + if (status != FC_STATUS_OK) + continue; + FCALD(("Sending PRLI to %02x\n", alpa)) + status = fc_do_prli(fc, alpa); + FCALD(("PRLI returned with status %d\n", status)) + if (status == FC_STATUS_OK) + fcal->map[target] = 1; + } + + host->max_id = 127; + host->irq = fc->irq; +#ifdef __sparc_v9__ + host->unchecked_isa_dma = 1; +#endif + + fc->channels = 1; + fc->targets = 127; + fc->ages = ages; + memset (ages, 0, 128 * sizeof(long)); + + fcal->fc = fc; + + FCALD(("Found FCAL\n")) + } + if (nfcals) +#ifdef __sparc__ + printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels found\n", nfcals); +#else + printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops found\n", nfcals); +#endif + return nfcals; +} + +int fcal_release(struct Scsi_Host *host) +{ + struct fcal *fcal = (struct fcal *)host->hostdata; + fc_channel *fc = fcal->fc; + + module_put(fc->module); + + fc->fcp_register(fc, TYPE_SCSI_FCP, 1); + FCALND((" releasing fcal.\n")); + kfree (fc->ages); + FCALND(("released fcal!\n")); + return 0; +} + +#undef SPRINTF +#define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); } + +int fcal_proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout) +{ + struct fcal *fcal; + fc_channel *fc; + char *pos = buffer; + int i, j; + + if (inout) return length; + + fcal = (struct fcal *)host->hostdata; + fc = fcal->fc; + +#ifdef __sparc__ + SPRINTF ("Sun Enterprise Network Array (A5000 or E?500) on %s PROM node %x\n", fc->name, fc->dev->prom_node); +#else + SPRINTF ("Fibre Channel Arbitrated Loop on %s\n", fc->name); +#endif + SPRINTF ("Initiator AL-PA: %02x\n", fc->sid); + + SPRINTF ("\nAttached devices:\n"); + + for (i = 0; i < fc->posmap->len; i++) { + unsigned char alpa = fc->posmap->list[i]; + unsigned char target; + u32 *u1, *u2; + + target = alpa2target[alpa]; + u1 = (u32 *)&fcal->nport_wwn[target]; + u2 = (u32 *)&fcal->node_wwn[target]; + if (!u1[0] && !u1[1]) { + SPRINTF (" [AL-PA: %02x] Not responded to PLOGI\n", alpa); + } else if (!fcal->map[target]) { + SPRINTF (" [AL-PA: %02x, Port WWN: %08x%08x, Node WWN: %08x%08x] Not responded to PRLI\n", + alpa, u1[0], u1[1], u2[0], u2[1]); + } else { + Scsi_Device *scd; + shost_for_each_device(scd, host) + if (scd->id == target) { + SPRINTF (" [AL-PA: %02x, Id: %02d, Port WWN: %08x%08x, Node WWN: %08x%08x] ", + alpa, target, u1[0], u1[1], u2[0], u2[1]); + SPRINTF ("%s ", (scd->type < MAX_SCSI_DEVICE_CODE) ? + scsi_device_types[(short) scd->type] : "Unknown device"); + + for (j = 0; (j < 8) && (scd->vendor[j] >= 0x20); j++) + SPRINTF ("%c", scd->vendor[j]); + SPRINTF (" "); + + for (j = 0; (j < 16) && (scd->model[j] >= 0x20); j++) + SPRINTF ("%c", scd->model[j]); + + SPRINTF ("\n"); + } + } + } + SPRINTF ("\n"); + + *start = buffer + offset; + + if ((pos - buffer) < offset) + return 0; + else if (pos - buffer - offset < length) + return pos - buffer - offset; + else + return length; +} + +/* + For FC-AL, we use a simple addressing: we have just one channel 0, + and all AL-PAs are mapped to targets 0..0x7e + */ +static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd) +{ + struct fcal *f; + + /* We don't support LUNs yet - I'm not sure if LUN should be in SCSI fcp_cdb, or in second byte of addr[0] */ + if (SCpnt->cmnd[1] & 0xe0) return -EINVAL; + /* FC-PLDA tells us... */ + memset(addr, 0, 8); + f = (struct fcal *)SCpnt->device->host->hostdata; + if (!f->map[SCpnt->device->id]) + return -EINVAL; + /* Now, determine DID: It will be Native Identifier, so we zero upper + 2 bytes of the 3 byte DID, lowest byte will be AL-PA */ + fcmd->did = target2alpa[SCpnt->device->id]; + FCALD(("trying DID %06x\n", fcmd->did)) + return 0; +} + +static Scsi_Host_Template driver_template = { + .name = "Fibre Channel Arbitrated Loop", + .detect = fcal_detect, + .release = fcal_release, + .proc_info = fcal_proc_info, + .queuecommand = fcp_scsi_queuecommand, + .slave_configure = fcal_slave_configure, + .can_queue = FCAL_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"); + |