diff options
Diffstat (limited to 'drivers/fc4/fc.c')
| -rw-r--r-- | drivers/fc4/fc.c | 1146 |
1 files changed, 0 insertions, 1146 deletions
diff --git a/drivers/fc4/fc.c b/drivers/fc4/fc.c deleted file mode 100644 index 82de9e1..0000000 --- a/drivers/fc4/fc.c +++ /dev/null @@ -1,1146 +0,0 @@ -/* fc.c: Generic Fibre Channel and FC4 SCSI driver. - * - * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz) - * Copyright (C) 1997,1998 Jirka Hanika (geo@ff.cuni.cz) - * - * There are two kinds of Fibre Channel adapters used in Linux. Either - * the adapter is "smart" and does all FC bookkeeping by itself and - * just presents a standard SCSI interface to the operating system - * (that's e.g. the case with Qlogic FC cards), or leaves most of the FC - * bookkeeping to the OS (e.g. soc, socal). Drivers for the former adapters - * will look like normal SCSI drivers (with the exception of max_id will be - * usually 127), the latter on the other side allows SCSI, IP over FC and other - * protocols. This driver tree is for the latter adapters. - * - * This file should support both Point-to-Point and Arbitrated Loop topologies. - * - * Sources: - * Fibre Channel Physical & Signaling Interface (FC-PH), dpANS, 1994 - * dpANS Fibre Channel Protocol for SCSI (X3.269-199X), Rev. 012, 1995 - * Fibre Channel Arbitrated Loop (FC-AL), Rev. 4.5, 1995 - * Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA), Rev. 2.1, 1997 - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/jiffies.h> -#include <linux/types.h> -#include <linux/fcntl.h> -#include <linux/interrupt.h> -#include <linux/ptrace.h> -#include <linux/ioport.h> -#include <linux/in.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/init.h> - -#include <asm/pgtable.h> -#include <asm/irq.h> -#include <asm/semaphore.h> -#include "fcp_impl.h" -#include <scsi/scsi_host.h> - -/* #define FCDEBUG */ - -#define fc_printk printk ("%s: ", fc->name); printk - -#ifdef FCDEBUG -#define FCD(x) fc_printk x; -#define FCND(x) printk ("FC: "); printk x; -#else -#define FCD(x) -#define FCND(x) -#endif - -#ifdef __sparc__ -#define dma_alloc_consistent(d,s,p) sbus_alloc_consistent(d,s,p) -#define dma_free_consistent(d,s,v,h) sbus_free_consistent(d,s,v,h) -#define dma_map_single(d,v,s,dir) sbus_map_single(d,v,s,dir) -#define dma_unmap_single(d,h,s,dir) sbus_unmap_single(d,h,s,dir) -#define dma_map_sg(d,s,n,dir) sbus_map_sg(d,s,n,dir) -#define dma_unmap_sg(d,s,n,dir) sbus_unmap_sg(d,s,n,dir) -#else -#define dma_alloc_consistent(d,s,p) pci_alloc_consistent(d,s,p) -#define dma_free_consistent(d,s,v,h) pci_free_consistent(d,s,v,h) -#define dma_map_single(d,v,s,dir) pci_map_single(d,v,s,dir) -#define dma_unmap_single(d,h,s,dir) pci_unmap_single(d,h,s,dir) -#define dma_map_sg(d,s,n,dir) pci_map_sg(d,s,n,dir) -#define dma_unmap_sg(d,s,n,dir) pci_unmap_sg(d,s,n,dir) -#endif - -#define FCP_CMND(SCpnt) ((fcp_cmnd *)&(SCpnt->SCp)) -#define FC_SCMND(SCpnt) ((fc_channel *)(SCpnt->device->host->hostdata[0])) -#define SC_FCMND(fcmnd) ((struct scsi_cmnd *)((long)fcmnd - (long)&(((struct scsi_cmnd *)0)->SCp))) - -static int fcp_scsi_queue_it(fc_channel *, struct scsi_cmnd *, fcp_cmnd *, int); -void fcp_queue_empty(fc_channel *); - -static void fcp_scsi_insert_queue (fc_channel *fc, fcp_cmnd *fcmd) -{ - if (!fc->scsi_que) { - fc->scsi_que = fcmd; - fcmd->next = fcmd; - fcmd->prev = fcmd; - } else { - fc->scsi_que->prev->next = fcmd; - fcmd->prev = fc->scsi_que->prev; - fc->scsi_que->prev = fcmd; - fcmd->next = fc->scsi_que; - } -} - -static void fcp_scsi_remove_queue (fc_channel *fc, fcp_cmnd *fcmd) -{ - if (fcmd == fcmd->next) { - fc->scsi_que = NULL; - return; - } - if (fcmd == fc->scsi_que) - fc->scsi_que = fcmd->next; - fcmd->prev->next = fcmd->next; - fcmd->next->prev = fcmd->prev; -} - -fc_channel *fc_channels = NULL; - -#define LSMAGIC 620829043 -typedef struct { - /* Must be first */ - struct semaphore sem; - int magic; - int count; - logi *logi; - fcp_cmnd *fcmds; - atomic_t todo; - struct timer_list timer; - unsigned char grace[0]; -} ls; - -#define LSOMAGIC 654907799 -typedef struct { - /* Must be first */ - struct semaphore sem; - int magic; - int count; - fcp_cmnd *fcmds; - atomic_t todo; - struct timer_list timer; -} lso; - -#define LSEMAGIC 84482456 -typedef struct { - /* Must be first */ - struct semaphore sem; - int magic; - int status; - struct timer_list timer; -} lse; - -static void fcp_login_timeout(unsigned long data) -{ - ls *l = (ls *)data; - FCND(("Login timeout\n")) - up(&l->sem); -} - -static void fcp_login_done(fc_channel *fc, int i, int status) -{ - fcp_cmnd *fcmd; - logi *plogi; - fc_hdr *fch; - ls *l = (ls *)fc->ls; - - FCD(("Login done %d %d\n", i, status)) - if (i < l->count) { - if (fc->state == FC_STATE_FPORT_OK) { - FCD(("Additional FPORT_OK received with status %d\n", status)) - return; - } - switch (status) { - case FC_STATUS_OK: /* Oh, we found a fabric */ - case FC_STATUS_P_RJT: /* Oh, we haven't found any */ - fc->state = FC_STATE_FPORT_OK; - fcmd = l->fcmds + i; - plogi = l->logi + 3 * i; - dma_unmap_single (fc->dev, fcmd->cmd, 3 * sizeof(logi), - DMA_BIDIRECTIONAL); - plogi->code = LS_PLOGI; - memcpy (&plogi->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn)); - memcpy (&plogi->node_wwn, &fc->wwn_node, sizeof(fc_wwn)); - memcpy (&plogi->common, fc->common_svc, sizeof(common_svc_parm)); - memcpy (&plogi->class1, fc->class_svcs, 3*sizeof(svc_parm)); - fch = &fcmd->fch; - fcmd->token += l->count; - FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, fc->did); - FILL_FCHDR_SID(fch, fc->sid); -#ifdef FCDEBUG - { - int i; - unsigned *x = (unsigned *)plogi; - printk ("logi: "); - for (i = 0; i < 21; i++) - printk ("%08x ", x[i]); - printk ("\n"); - } -#endif - fcmd->cmd = dma_map_single (fc->dev, plogi, 3 * sizeof(logi), - DMA_BIDIRECTIONAL); - fcmd->rsp = fcmd->cmd + 2 * sizeof(logi); - if (fc->hw_enque (fc, fcmd)) - printk ("FC: Cannot enque PLOGI packet on %s\n", fc->name); - break; - case FC_STATUS_ERR_OFFLINE: - fc->state = FC_STATE_MAYBEOFFLINE; - FCD (("FC is offline %d\n", l->grace[i])) - break; - default: - printk ("FLOGI failed for %s with status %d\n", fc->name, status); - /* Do some sort of error recovery here */ - break; - } - } else { - i -= l->count; - if (fc->state != FC_STATE_FPORT_OK) { - FCD(("Unexpected N-PORT rsp received")) - return; - } - switch (status) { - case FC_STATUS_OK: - plogi = l->logi + 3 * i; - dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), - DMA_BIDIRECTIONAL); - if (!fc->wwn_dest.lo && !fc->wwn_dest.hi) { - memcpy (&fc->wwn_dest, &plogi[1].node_wwn, sizeof(fc_wwn)); - FCD(("Dest WWN %08x%08x\n", *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo)) - } else if (fc->wwn_dest.lo != plogi[1].node_wwn.lo || - fc->wwn_dest.hi != plogi[1].node_wwn.hi) { - printk ("%s: mismatch in wwns. Got %08x%08x, expected %08x%08x\n", - fc->name, - *(u32 *)&plogi[1].node_wwn, plogi[1].node_wwn.lo, - *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo); - } - fc->state = FC_STATE_ONLINE; - printk ("%s: ONLINE\n", fc->name); - if (atomic_dec_and_test (&l->todo)) - up(&l->sem); - break; - case FC_STATUS_ERR_OFFLINE: - fc->state = FC_STATE_OFFLINE; - dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), - DMA_BIDIRECTIONAL); - printk ("%s: FC is offline\n", fc->name); - if (atomic_dec_and_test (&l->todo)) - up(&l->sem); - break; - default: - printk ("PLOGI failed for %s with status %d\n", fc->name, status); - /* Do some sort of error recovery here */ - break; - } - } -} - -static void fcp_report_map_done(fc_channel *fc, int i, int status) -{ - fcp_cmnd *fcmd; - fc_hdr *fch; - unsigned char j; - ls *l = (ls *)fc->ls; - fc_al_posmap *p; - - FCD(("Report map done %d %d\n", i, status)) - switch (status) { - case FC_STATUS_OK: /* Ok, let's have a fun on a loop */ - dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), - DMA_BIDIRECTIONAL); - p = (fc_al_posmap *)(l->logi + 3 * i); -#ifdef FCDEBUG - { - u32 *u = (u32 *)p; - FCD(("%08x\n", u[0])) - u ++; - FCD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n", u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7])) - } -#endif - if ((p->magic & 0xffff0000) != FC_AL_LILP || !p->len) { - printk ("FC: Bad magic from REPORT_AL_MAP on %s - %08x\n", fc->name, p->magic); - fc->state = FC_STATE_OFFLINE; - } else { - fc->posmap = kzalloc(sizeof(fcp_posmap)+p->len, GFP_KERNEL); - if (!fc->posmap) { - printk("FC: Not enough memory, offlining channel\n"); - fc->state = FC_STATE_OFFLINE; - } else { - int k; - /* FIXME: This is where SOCAL transfers our AL-PA. - Keep it here till we found out what other cards do... */ - fc->sid = (p->magic & 0xff); - for (i = 0; i < p->len; i++) - if (p->alpa[i] == fc->sid) - break; - k = p->len; - if (i == p->len) - i = 0; - else { - p->len--; - i++; - } - fc->posmap->len = p->len; - for (j = 0; j < p->len; j++) { - if (i == k) i = 0; - fc->posmap->list[j] = p->alpa[i++]; - } - fc->state = FC_STATE_ONLINE; - } - } - printk ("%s: ONLINE\n", fc->name); - if (atomic_dec_and_test (&l->todo)) - up(&l->sem); - break; - case FC_STATUS_POINTTOPOINT: /* We're Point-to-Point, no AL... */ - FCD(("SID %d DID %d\n", fc->sid, fc->did)) - fcmd = l->fcmds + i; - dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), - DMA_BIDIRECTIONAL); - fch = &fcmd->fch; - memset(l->logi + 3 * i, 0, 3 * sizeof(logi)); - FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT); - FILL_FCHDR_SID(fch, 0); - FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE); - FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0); - FILL_FCHDR_OXRX(fch, 0xffff, 0xffff); - fch->param = 0; - l->logi [3 * i].code = LS_FLOGI; - fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), - DMA_BIDIRECTIONAL); - fcmd->rsp = fcmd->cmd + sizeof(logi); - fcmd->cmdlen = sizeof(logi); - fcmd->rsplen = sizeof(logi); - fcmd->data = (dma_addr_t)NULL; - fcmd->class = FC_CLASS_SIMPLE; - fcmd->proto = TYPE_EXTENDED_LS; - if (fc->hw_enque (fc, fcmd)) - printk ("FC: Cannot enque FLOGI packet on %s\n", fc->name); - break; - case FC_STATUS_ERR_OFFLINE: - fc->state = FC_STATE_MAYBEOFFLINE; - FCD (("FC is offline %d\n", l->grace[i])) - break; - default: - printk ("FLOGI failed for %s with status %d\n", fc->name, status); - /* Do some sort of error recovery here */ - break; - } -} - -void fcp_register(fc_channel *fc, u8 type, int unregister) -{ - int size, i; - int slots = (fc->can_queue * 3) >> 1; - - FCND(("Going to %sregister\n", unregister ? "un" : "")) - - if (type == TYPE_SCSI_FCP) { - if (!unregister) { - fc->scsi_cmd_pool = (fcp_cmd *) - dma_alloc_consistent (fc->dev, - slots * (sizeof (fcp_cmd) + fc->rsp_size), - &fc->dma_scsi_cmd); - fc->scsi_rsp_pool = (char *)(fc->scsi_cmd_pool + slots); - fc->dma_scsi_rsp = fc->dma_scsi_cmd + slots * sizeof (fcp_cmd); - fc->scsi_bitmap_end = (slots + 63) & ~63; - size = fc->scsi_bitmap_end / 8; - fc->scsi_bitmap = kzalloc (size, GFP_KERNEL); - set_bit (0, fc->scsi_bitmap); - for (i = fc->can_queue; i < fc->scsi_bitmap_end; i++) - set_bit (i, fc->scsi_bitmap); - fc->scsi_free = fc->can_queue; - fc->cmd_slots = kzalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL); - fc->abort_count = 0; - } else { - fc->scsi_name[0] = 0; - kfree (fc->scsi_bitmap); - kfree (fc->cmd_slots); - FCND(("Unregistering\n")); -#if 0 - if (fc->rst_pkt) { - if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED) - kfree(fc->rst_pkt); - else { - /* Can't happen. Some memory would be lost. */ - printk("FC: Reset in progress. Now?!"); - } - } -#endif - FCND(("Unregistered\n")); - } - } else - printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type); -} - -static void fcp_scsi_done(struct scsi_cmnd *SCpnt); - -static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch) -{ - fcp_cmnd *fcmd; - fcp_rsp *rsp; - int host_status; - struct scsi_cmnd *SCpnt; - int sense_len; - int rsp_status; - - fcmd = fc->cmd_slots[token]; - if (!fcmd) return; - rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token); - SCpnt = SC_FCMND(fcmd); - - if (SCpnt->done != fcp_scsi_done) - return; - - rsp_status = rsp->fcp_status; - FCD(("rsp_status %08x status %08x\n", rsp_status, status)) - switch (status) { - case FC_STATUS_OK: - host_status=DID_OK; - - if (rsp_status & FCP_STATUS_RESID) { -#ifdef FCDEBUG - FCD(("Resid %d\n", rsp->fcp_resid)) - { - fcp_cmd *cmd = fc->scsi_cmd_pool + token; - int i; - - printk ("Command "); - for (i = 0; i < sizeof(fcp_cmd); i+=4) - printk ("%08x ", *(u32 *)(((char *)cmd)+i)); - printk ("\nResponse "); - for (i = 0; i < fc->rsp_size; i+=4) - printk ("%08x ", *(u32 *)(((char *)rsp)+i)); - printk ("\n"); - } -#endif - } - - if (rsp_status & FCP_STATUS_SENSE_LEN) { - sense_len = rsp->fcp_sense_len; - if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer); - memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len); - } - - if (fcmd->data) - dma_unmap_sg(fc->dev, scsi_sglist(SCpnt), - scsi_sg_count(SCpnt), - SCpnt->sc_data_direction); - break; - default: - host_status=DID_ERROR; /* FIXME */ - FCD(("Wrong FC status %d for token %d\n", status, token)) - break; - } - - if (status_byte(rsp_status) == QUEUE_FULL) { - printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->device->channel, SCpnt->device->id, rsp_status); - } - - SCpnt->result = (host_status << 16) | (rsp_status & 0xff); -#ifdef FCDEBUG - if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n", - host_status, SCpnt->result); -#endif - SCpnt->done = fcmd->done; - fcmd->done=NULL; - clear_bit(token, fc->scsi_bitmap); - fc->scsi_free++; - FCD(("Calling scsi_done with %08x\n", SCpnt->result)) - SCpnt->scsi_done(SCpnt); -} - -void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch) -{ - int magic; - FCD(("receive_solicited %d %d %d\n", proto, token, status)) - switch (proto) { - case TYPE_SCSI_FCP: - fcp_scsi_receive(fc, token, status, fch); break; - case TYPE_EXTENDED_LS: - case PROTO_REPORT_AL_MAP: - magic = 0; - if (fc->ls) - magic = ((ls *)(fc->ls))->magic; - if (magic == LSMAGIC) { - ls *l = (ls *)fc->ls; - int i = (token >= l->count) ? token - l->count : token; - - /* Let's be sure */ - if ((unsigned)i < l->count && l->fcmds[i].fc == fc) { - if (proto == TYPE_EXTENDED_LS) - fcp_login_done(fc, token, status); - else - fcp_report_map_done(fc, token, status); - break; - } - } - FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots)) - if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) { - fcp_cmnd *fcmd; - - fcmd = fc->cmd_slots[token]; - if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) { - lse *l = (lse *)fcmd->ls; - - l->status = status; - up (&l->sem); - } - } - break; - case PROTO_OFFLINE: - if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) { - lso *l = (lso *)fc->ls; - - if ((unsigned)token < l->count && l->fcmds[token].fc == fc) { - /* Wow, OFFLINE response arrived :) */ - FCD(("OFFLINE Response arrived\n")) - fc->state = FC_STATE_OFFLINE; - if (atomic_dec_and_test (&l->todo)) - up(&l->sem); - } - } - break; - - default: - break; - } -} - -void fcp_state_change(fc_channel *fc, int state) -{ - FCD(("state_change %d %d\n", state, fc->state)) - if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE) - fc->state = FC_STATE_UNINITED; - else if (state == FC_STATE_ONLINE) - printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name); - else - printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name); -} - -int fcp_initialize(fc_channel *fcchain, int count) -{ - fc_channel *fc; - fcp_cmnd *fcmd; - int i, retry, ret; - ls *l; - - FCND(("fcp_inititialize %08lx\n", (long)fcp_init)) - FCND(("fc_channels %08lx\n", (long)fc_channels)) - FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did)) - l = kzalloc(sizeof (ls) + count, GFP_KERNEL); - if (!l) { - printk ("FC: Cannot allocate memory for initialization\n"); - return -ENOMEM; - } - l->magic = LSMAGIC; - l->count = count; - FCND(("FCP Init for %d channels\n", count)) - init_MUTEX_LOCKED(&l->sem); - init_timer(&l->timer); - l->timer.function = fcp_login_timeout; - l->timer.data = (unsigned long)l; - atomic_set (&l->todo, count); - l->logi = kzalloc (count * 3 * sizeof(logi), GFP_KERNEL); - l->fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL); - if (!l->logi || !l->fcmds) { - kfree (l->logi); - kfree (l->fcmds); - kfree (l); - printk ("FC: Cannot allocate DMA memory for initialization\n"); - return -ENOMEM; - } - for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { - fc->state = FC_STATE_UNINITED; - fc->rst_pkt = NULL; /* kmalloc when first used */ - } - /* First try if we are in a AL topology */ - FCND(("Initializing REPORT_MAP packets\n")) - for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { - fcmd = l->fcmds + i; - fc->login = fcmd; - fc->ls = (void *)l; - /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */ - fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), - DMA_BIDIRECTIONAL); - fcmd->proto = PROTO_REPORT_AL_MAP; - fcmd->token = i; - fcmd->fc = fc; - } - for (retry = 0; retry < 8; retry++) { - int nqueued = 0; - FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n")) - for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { - if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE) - continue; - disable_irq(fc->irq); - if (fc->state == FC_STATE_MAYBEOFFLINE) { - if (!l->grace[i]) { - l->grace[i]++; - FCD(("Grace\n")) - } else { - fc->state = FC_STATE_OFFLINE; - enable_irq(fc->irq); - dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL); - if (atomic_dec_and_test (&l->todo)) - goto all_done; - } - } - ret = fc->hw_enque (fc, fc->login); - enable_irq(fc->irq); - if (!ret) { - nqueued++; - continue; - } - if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) { - /* Oh yes, this card handles Point-to-Point only, so let's try that. */ - fc_hdr *fch; - - FCD(("SID %d DID %d\n", fc->sid, fc->did)) - fcmd = l->fcmds + i; - dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL); - fch = &fcmd->fch; - FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT); - FILL_FCHDR_SID(fch, 0); - FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE); - FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0); - FILL_FCHDR_OXRX(fch, 0xffff, 0xffff); - fch->param = 0; - l->logi [3 * i].code = LS_FLOGI; - fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), DMA_BIDIRECTIONAL); - fcmd->rsp = fcmd->cmd + sizeof(logi); - fcmd->cmdlen = sizeof(logi); - fcmd->rsplen = sizeof(logi); - fcmd->data = (dma_addr_t)NULL; - fcmd->class = FC_CLASS_SIMPLE; - fcmd->proto = TYPE_EXTENDED_LS; - } else - printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name); - } - - if (nqueued) { - l->timer.expires = jiffies + 5 * HZ; - add_timer(&l->timer); - - down(&l->sem); - if (!atomic_read(&l->todo)) { - FCND(("All channels answered in time\n")) - break; /* All fc channels have answered us */ - } - } - } -all_done: - for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { - fc->ls = NULL; - switch (fc->state) { - case FC_STATE_ONLINE: break; - case FC_STATE_OFFLINE: break; - default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL); - break; - } - } - del_timer(&l->timer); - kfree (l->logi); - kfree (l->fcmds); - kfree (l); - return 0; -} - -int fcp_forceoffline(fc_channel *fcchain, int count) -{ - fc_channel *fc; - fcp_cmnd *fcmd; - int i, ret; - lso l; - - memset (&l, 0, sizeof(lso)); - l.count = count; - l.magic = LSOMAGIC; - FCND(("FCP Force Offline for %d channels\n", count)) - init_MUTEX_LOCKED(&l.sem); - init_timer(&l.timer); - l.timer.function = fcp_login_timeout; - l.timer.data = (unsigned long)&l; - atomic_set (&l.todo, count); - l.fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL); - if (!l.fcmds) { - printk ("FC: Cannot allocate memory for forcing offline\n"); - return -ENOMEM; - } - FCND(("Initializing OFFLINE packets\n")) - for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { - fc->state = FC_STATE_UNINITED; - fcmd = l.fcmds + i; - fc->login = fcmd; - fc->ls = (void *)&l; - fcmd->did = fc->did; - fcmd->class = FC_CLASS_OFFLINE; - fcmd->proto = PROTO_OFFLINE; - fcmd->token = i; - fcmd->fc = fc; - disable_irq(fc->irq); - ret = fc->hw_enque (fc, fc->login); - enable_irq(fc->irq); - if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name); - } - - l.timer.expires = jiffies + 5 * HZ; - add_timer(&l.timer); - down(&l.sem); - del_timer(&l.timer); - - for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) - fc->ls = NULL; - kfree (l.fcmds); - return 0; -} - -int fcp_init(fc_channel *fcchain) -{ - fc_channel *fc; - int count=0; - int ret; - - for (fc = fcchain; fc; fc = fc->next) { - fc->fcp_register = fcp_register; - count++; - } - - ret = fcp_initialize (fcchain, count); - if (ret) - return ret; - - if (!fc_channels) - fc_channels = fcchain; - else { - for (fc = fc_channels; fc->next; fc = fc->next); - fc->next = fcchain; - } - return ret; -} - -void fcp_release(fc_channel *fcchain, int count) /* count must > 0 */ -{ - fc_channel *fc; - fc_channel *fcx; - - for (fc = fcchain; --count && fc->next; fc = fc->next); - if (count) { - printk("FC: nothing to release\n"); - return; - } - - if (fc_channels == fcchain) - fc_channels = fc->next; - else { - for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next); - fcx->next = fc->next; - } - fc->next = NULL; - - /* - * We've just grabbed fcchain out of the fc_channel list - * and zero-terminated it, while destroying the count. - * - * Freeing the fc's is the low level driver's responsibility. - */ -} - - -static void fcp_scsi_done(struct scsi_cmnd *SCpnt) -{ - if (FCP_CMND(SCpnt)->done) - FCP_CMND(SCpnt)->done(SCpnt); -} - -static int fcp_scsi_queue_it(fc_channel *fc, struct scsi_cmnd *SCpnt, - fcp_cmnd *fcmd, int prepare) -{ - long i; - fcp_cmd *cmd; - u32 fcp_cntl; - if (prepare) { - i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end); - set_bit (i, fc->scsi_bitmap); - fcmd->token = i; - cmd = fc->scsi_cmd_pool + i; - - if (fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd)) { - /* Invalid channel/id/lun and couldn't map it into fcp_addr */ - clear_bit (i, fc->scsi_bitmap); - SCpnt->result = (DID_BAD_TARGET << 16); - SCpnt->scsi_done(SCpnt); - return 0; - } - fc->scsi_free--; - fc->cmd_slots[fcmd->token] = fcmd; - - if (SCpnt->device->tagged_supported) { - if (jiffies - fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] > (5 * 60 * HZ)) { - fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] = jiffies; - fcp_cntl = FCP_CNTL_QTYPE_ORDERED; - } else - fcp_cntl = FCP_CNTL_QTYPE_SIMPLE; - } else - fcp_cntl = FCP_CNTL_QTYPE_UNTAGGED; - - if (!scsi_bufflen(SCpnt)) { - cmd->fcp_cntl = fcp_cntl; - fcmd->data = (dma_addr_t)NULL; - } else { - struct scatterlist *sg; - int nents; - - switch (SCpnt->cmnd[0]) { - case WRITE_6: - case WRITE_10: - case WRITE_12: - cmd->fcp_cntl = (FCP_CNTL_WRITE | fcp_cntl); break; - default: - cmd->fcp_cntl = (FCP_CNTL_READ | fcp_cntl); break; - } - - sg = scsi_sglist(SCpnt); - nents = dma_map_sg(fc->dev, sg, scsi_sg_count(SCpnt), - SCpnt->sc_data_direction); - fcmd->data = sg_dma_address(sg); - cmd->fcp_data_len = sg_dma_len(sg); - } - memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len); - memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len); - FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8))) - } - FCD(("Trying to enque %p\n", fcmd)) - if (!fc->scsi_que) { - if (!fc->hw_enque (fc, fcmd)) { - FCD(("hw_enque succeeded for %p\n", fcmd)) - return 0; - } - } - FCD(("Putting into que1 %p\n", fcmd)) - fcp_scsi_insert_queue (fc, fcmd); - return 0; -} - -int fcp_scsi_queuecommand(struct scsi_cmnd *SCpnt, - void (* done)(struct scsi_cmnd *)) -{ - fcp_cmnd *fcmd = FCP_CMND(SCpnt); - fc_channel *fc = FC_SCMND(SCpnt); - - FCD(("Entering SCSI queuecommand %p\n", fcmd)) - if (SCpnt->done != fcp_scsi_done) { - fcmd->done = SCpnt->done; - SCpnt->done = fcp_scsi_done; - SCpnt->scsi_done = done; - fcmd->proto = TYPE_SCSI_FCP; - if (!fc->scsi_free) { - FCD(("FC: !scsi_free, putting cmd on ML queue\n")) -#if (FCP_SCSI_USE_NEW_EH_CODE == 0) - printk("fcp_scsi_queue_command: queue full, losing cmd, bad\n"); -#endif - return 1; - } - return fcp_scsi_queue_it(fc, SCpnt, fcmd, 1); - } - return fcp_scsi_queue_it(fc, SCpnt, fcmd, 0); -} - -void fcp_queue_empty(fc_channel *fc) -{ - fcp_cmnd *fcmd; - - FCD(("Queue empty\n")) - while ((fcmd = fc->scsi_que)) { - /* The hw told us we can try again queue some packet */ - if (fc->hw_enque (fc, fcmd)) - break; - fcp_scsi_remove_queue (fc, fcmd); - } -} - -int fcp_scsi_abort(struct scsi_cmnd *SCpnt) -{ - /* Internal bookkeeping only. Lose 1 cmd_slots slot. */ - fcp_cmnd *fcmd = FCP_CMND(SCpnt); - fc_channel *fc = FC_SCMND(SCpnt); - - /* - * We react to abort requests by simply forgetting - * about the command and pretending everything's sweet. - * This may or may not be silly. We can't, however, - * immediately reuse the command's cmd_slots slot, - * as its result may arrive later and we cannot - * check whether it is the aborted one, can't we? - * - * Therefore, after the first few aborts are done, - * we tell the scsi error handler to do something clever. - * It will eventually call host reset, refreshing - * cmd_slots for us. - * - * There is a theoretical chance that we sometimes allow - * more than can_queue packets to the jungle this way, - * but the worst outcome possible is a series of - * more aborts and eventually the dev_reset catharsis. - */ - - if (++fc->abort_count < (fc->can_queue >> 1)) { - SCpnt->result = DID_ABORT; - fcmd->done(SCpnt); - printk("FC: soft abort\n"); - return SUCCESS; - } else { - printk("FC: hard abort refused\n"); - return FAILED; - } -} - -#if 0 -void fcp_scsi_reset_done(struct scsi_cmnd *SCpnt) -{ - fc_channel *fc = FC_SCMND(SCpnt); - - fc->rst_pkt->eh_state = SCSI_STATE_FINISHED; - up(fc->rst_pkt->device->host->eh_action); -} -#endif - -#define FCP_RESET_TIMEOUT (2*HZ) - -int fcp_scsi_dev_reset(struct scsi_cmnd *SCpnt) -{ -#if 0 /* broken junk, but if davem wants to compile this driver, let him.. */ - unsigned long flags; - fcp_cmd *cmd; - fcp_cmnd *fcmd; - fc_channel *fc = FC_SCMND(SCpnt); - DECLARE_MUTEX_LOCKED(sem); - - if (!fc->rst_pkt) { - fc->rst_pkt = kmalloc(sizeof(SCpnt), GFP_KERNEL); - if (!fc->rst_pkt) return FAILED; - - fcmd = FCP_CMND(fc->rst_pkt); - - - fcmd->token = 0; - cmd = fc->scsi_cmd_pool + 0; - FCD(("Preparing rst packet\n")) - fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd); - fc->rst_pkt->device = SCpnt->device; - fc->rst_pkt->cmd_len = 0; - - fc->cmd_slots[0] = fcmd; - - cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET; - fcmd->data = (dma_addr_t)NULL; - fcmd->proto = TYPE_SCSI_FCP; - - memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len); - memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len); - FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8))) - } else { - fcmd = FCP_CMND(fc->rst_pkt); - if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED) - return FAILED; /* or SUCCESS. Only these */ - } - fc->rst_pkt->done = NULL; - - - fc->rst_pkt->eh_state = SCSI_STATE_QUEUED; - init_timer(&fc->rst_pkt->eh_timeout); - fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt; - fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT; - fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done; - - add_timer(&fc->rst_pkt->eh_timeout); - - /* - * Set up the semaphore so we wait for the command to complete. - */ - - fc->rst_pkt->device->host->eh_action = &sem; - - fc->rst_pkt->done = fcp_scsi_reset_done; - - spin_lock_irqsave(SCpnt->device->host->host_lock, flags); - fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0); - spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); - - down(&sem); - - fc->rst_pkt->device->host->eh_action = NULL; - del_timer(&fc->rst_pkt->eh_timeout); - - /* - * See if timeout. If so, tell the host to forget about it. - * In other words, we don't want a callback any more. - */ - if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) { - fc->rst_pkt->eh_state = SCSI_STATE_UNUSED; - return FAILED; - } - fc->rst_pkt->eh_state = SCSI_STATE_UNUSED; -#endif - return SUCCESS; -} - -static int __fcp_scsi_host_reset(struct scsi_cmnd *SCpnt) -{ - fc_channel *fc = FC_SCMND(SCpnt); - fcp_cmnd *fcmd = FCP_CMND(SCpnt); - int i; - - printk ("FC: host reset\n"); - - for (i=0; i < fc->can_queue; i++) { - if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) { - SCpnt->result = DID_RESET; - fcmd->done(SCpnt); - fc->cmd_slots[i] = NULL; - } - } - fc->reset(fc); - fc->abort_count = 0; - if (fcp_initialize(fc, 1)) return SUCCESS; - else return FAILED; -} - -int fcp_scsi_host_reset(struct scsi_cmnd *SCpnt) -{ - unsigned long flags; - int rc; - - spin_lock_irqsave(SCpnt->device->host->host_lock, flags); - rc = __fcp_scsi_host_reset(SCpnt); - spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); - - return rc; -} - -static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd) -{ - long i; - - i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end); - set_bit (i, fc->scsi_bitmap); - fcmd->token = i; - fc->scsi_free--; - fc->cmd_slots[fcmd->token] = fcmd; - return fcp_scsi_queue_it(fc, NULL, fcmd, 0); -} - -static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len) -{ - fcp_cmnd _fcmd, *fcmd; - fc_hdr *fch; - lse l; - int i; - - fcmd = &_fcmd; - memset(fcmd, 0, sizeof(fcp_cmnd)); - FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa)) - fch = &fcmd->fch; - FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa); - FILL_FCHDR_SID(fch, fc->sid); - FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE); - FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0); - FILL_FCHDR_OXRX(fch, 0xffff, 0xffff); - fch->param = 0; - fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, DMA_BIDIRECTIONAL); - fcmd->rsp = fcmd->cmd + len; - fcmd->cmdlen = len; - fcmd->rsplen = len; - fcmd->data = (dma_addr_t)NULL; - fcmd->fc = fc; - fcmd->class = FC_CLASS_SIMPLE; - fcmd->proto = TYPE_EXTENDED_LS; - - memset (&l, 0, sizeof(lse)); - l.magic = LSEMAGIC; - init_MUTEX_LOCKED(&l.sem); - l.timer.function = fcp_login_timeout; - l.timer.data = (unsigned long)&l; - l.status = FC_STATUS_TIMED_OUT; - fcmd->ls = (void *)&l; - - disable_irq(fc->irq); - fcp_els_queue_it(fc, fcmd); - enable_irq(fc->irq); - - for (i = 0;;) { - l.timer.expires = jiffies + 5 * HZ; - add_timer(&l.timer); - down(&l.sem); - del_timer(&l.timer); - if (l.status != FC_STATUS_TIMED_OUT) break; - if (++i == 3) break; - disable_irq(fc->irq); - fcp_scsi_queue_it(fc, NULL, fcmd, 0); - enable_irq(fc->irq); - } - - clear_bit(fcmd->token, fc->scsi_bitmap); - fc->scsi_free++; - dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, DMA_BIDIRECTIONAL); - return l.status; -} - -int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport) -{ - logi *l; - int status; - - l = kzalloc(2 * sizeof(logi), GFP_KERNEL); - if (!l) return -ENOMEM; - l->code = LS_PLOGI; - memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn)); - memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn)); - memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm)); - memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm)); - status = fc_do_els(fc, alpa, l, sizeof(logi)); - if (status == FC_STATUS_OK) { - if (l[1].code == LS_ACC) { -#ifdef FCDEBUG - u32 *u = (u32 *)&l[1].nport_wwn; - FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa, - u[0], u[1], u[2], u[3])) -#endif - memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn)); - memcpy(node, &l[1].node_wwn, sizeof(fc_wwn)); - } else - status = FC_STATUS_BAD_RSP; - } - kfree(l); - return status; -} - -typedef struct { - unsigned int code; - unsigned params[4]; -} prli; - -int fc_do_prli(fc_channel *fc, unsigned char alpa) -{ - prli *p; - int status; - - p = kzalloc(2 * sizeof(prli), GFP_KERNEL); - if (!p) return -ENOMEM; - p->code = LS_PRLI; - p->params[0] = 0x08002000; - p->params[3] = 0x00000022; - status = fc_do_els(fc, alpa, p, sizeof(prli)); - if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC) - status = FC_STATUS_BAD_RSP; - kfree(p); - return status; -} - -MODULE_LICENSE("GPL"); - |