| /******************************************************************* |
| * This file is part of the Emulex Linux Device Driver for * |
| * Fibre Channel Host Bus Adapters. * |
| * Copyright (C) 2004-2008 Emulex. All rights reserved. * |
| * EMULEX and SLI are trademarks of Emulex. * |
| * www.emulex.com * |
| * Portions Copyright (C) 2004-2005 Christoph Hellwig * |
| * * |
| * This program is free software; you can redistribute it and/or * |
| * modify it under the terms of version 2 of the GNU General * |
| * Public License as published by the Free Software Foundation. * |
| * This program is distributed in the hope that it will be useful. * |
| * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * |
| * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * |
| * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * |
| * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * |
| * TO BE LEGALLY INVALID. See the GNU General Public License for * |
| * more details, a copy of which can be found in the file COPYING * |
| * included with this package. * |
| *******************************************************************/ |
| #include <linux/pci.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <asm/unaligned.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_eh.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_tcq.h> |
| #include <scsi/scsi_transport_fc.h> |
| |
| #include "lpfc_version.h" |
| #include "lpfc_hw.h" |
| #include "lpfc_sli.h" |
| #include "lpfc_nl.h" |
| #include "lpfc_disc.h" |
| #include "lpfc_scsi.h" |
| #include "lpfc.h" |
| #include "lpfc_logmsg.h" |
| #include "lpfc_crtn.h" |
| #include "lpfc_vport.h" |
| |
| #define LPFC_RESET_WAIT 2 |
| #define LPFC_ABORT_WAIT 2 |
| |
| int _dump_buf_done; |
| |
| static char *dif_op_str[] = { |
| "SCSI_PROT_NORMAL", |
| "SCSI_PROT_READ_INSERT", |
| "SCSI_PROT_WRITE_STRIP", |
| "SCSI_PROT_READ_STRIP", |
| "SCSI_PROT_WRITE_INSERT", |
| "SCSI_PROT_READ_PASS", |
| "SCSI_PROT_WRITE_PASS", |
| "SCSI_PROT_READ_CONVERT", |
| "SCSI_PROT_WRITE_CONVERT" |
| }; |
| |
| static void |
| lpfc_debug_save_data(struct scsi_cmnd *cmnd) |
| { |
| void *src, *dst; |
| struct scatterlist *sgde = scsi_sglist(cmnd); |
| |
| if (!_dump_buf_data) { |
| printk(KERN_ERR "BLKGRD ERROR %s _dump_buf_data is NULL\n", |
| __func__); |
| return; |
| } |
| |
| |
| if (!sgde) { |
| printk(KERN_ERR "BLKGRD ERROR: data scatterlist is null\n"); |
| return; |
| } |
| |
| dst = (void *) _dump_buf_data; |
| while (sgde) { |
| src = sg_virt(sgde); |
| memcpy(dst, src, sgde->length); |
| dst += sgde->length; |
| sgde = sg_next(sgde); |
| } |
| } |
| |
| static void |
| lpfc_debug_save_dif(struct scsi_cmnd *cmnd) |
| { |
| void *src, *dst; |
| struct scatterlist *sgde = scsi_prot_sglist(cmnd); |
| |
| if (!_dump_buf_dif) { |
| printk(KERN_ERR "BLKGRD ERROR %s _dump_buf_data is NULL\n", |
| __func__); |
| return; |
| } |
| |
| if (!sgde) { |
| printk(KERN_ERR "BLKGRD ERROR: prot scatterlist is null\n"); |
| return; |
| } |
| |
| dst = _dump_buf_dif; |
| while (sgde) { |
| src = sg_virt(sgde); |
| memcpy(dst, src, sgde->length); |
| dst += sgde->length; |
| sgde = sg_next(sgde); |
| } |
| } |
| |
| /** |
| * lpfc_update_stats - Update statistical data for the command completion |
| * @phba: Pointer to HBA object. |
| * @lpfc_cmd: lpfc scsi command object pointer. |
| * |
| * This function is called when there is a command completion and this |
| * function updates the statistical data for the command completion. |
| **/ |
| static void |
| lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| struct lpfc_rport_data *rdata = lpfc_cmd->rdata; |
| struct lpfc_nodelist *pnode = rdata->pnode; |
| struct scsi_cmnd *cmd = lpfc_cmd->pCmd; |
| unsigned long flags; |
| struct Scsi_Host *shost = cmd->device->host; |
| struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; |
| unsigned long latency; |
| int i; |
| |
| if (cmd->result) |
| return; |
| |
| latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (!vport->stat_data_enabled || |
| vport->stat_data_blocked || |
| !pnode->lat_data || |
| (phba->bucket_type == LPFC_NO_BUCKET)) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return; |
| } |
| |
| if (phba->bucket_type == LPFC_LINEAR_BUCKET) { |
| i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ |
| phba->bucket_step; |
| /* check array subscript bounds */ |
| if (i < 0) |
| i = 0; |
| else if (i >= LPFC_MAX_BUCKET_COUNT) |
| i = LPFC_MAX_BUCKET_COUNT - 1; |
| } else { |
| for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++) |
| if (latency <= (phba->bucket_base + |
| ((1<<i)*phba->bucket_step))) |
| break; |
| } |
| |
| pnode->lat_data[i].cmd_count++; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| /** |
| * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event |
| * @phba: Pointer to HBA context object. |
| * @vport: Pointer to vport object. |
| * @ndlp: Pointer to FC node associated with the target. |
| * @lun: Lun number of the scsi device. |
| * @old_val: Old value of the queue depth. |
| * @new_val: New value of the queue depth. |
| * |
| * This function sends an event to the mgmt application indicating |
| * there is a change in the scsi device queue depth. |
| **/ |
| static void |
| lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, |
| struct lpfc_vport *vport, |
| struct lpfc_nodelist *ndlp, |
| uint32_t lun, |
| uint32_t old_val, |
| uint32_t new_val) |
| { |
| struct lpfc_fast_path_event *fast_path_evt; |
| unsigned long flags; |
| |
| fast_path_evt = lpfc_alloc_fast_evt(phba); |
| if (!fast_path_evt) |
| return; |
| |
| fast_path_evt->un.queue_depth_evt.scsi_event.event_type = |
| FC_REG_SCSI_EVENT; |
| fast_path_evt->un.queue_depth_evt.scsi_event.subcategory = |
| LPFC_EVENT_VARQUEDEPTH; |
| |
| /* Report all luns with change in queue depth */ |
| fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun; |
| if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { |
| memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn, |
| &ndlp->nlp_portname, sizeof(struct lpfc_name)); |
| memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn, |
| &ndlp->nlp_nodename, sizeof(struct lpfc_name)); |
| } |
| |
| fast_path_evt->un.queue_depth_evt.oldval = old_val; |
| fast_path_evt->un.queue_depth_evt.newval = new_val; |
| fast_path_evt->vport = vport; |
| |
| fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT; |
| spin_lock_irqsave(&phba->hbalock, flags); |
| list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| lpfc_worker_wake_up(phba); |
| |
| return; |
| } |
| |
| /** |
| * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread |
| * @phba: The Hba for which this call is being executed. |
| * |
| * This routine is called when there is resource error in driver or firmware. |
| * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine |
| * posts at most 1 event each second. This routine wakes up worker thread of |
| * @phba to process WORKER_RAM_DOWN_EVENT event. |
| * |
| * This routine should be called with no lock held. |
| **/ |
| void |
| lpfc_rampdown_queue_depth(struct lpfc_hba *phba) |
| { |
| unsigned long flags; |
| uint32_t evt_posted; |
| |
| spin_lock_irqsave(&phba->hbalock, flags); |
| atomic_inc(&phba->num_rsrc_err); |
| phba->last_rsrc_error_time = jiffies; |
| |
| if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) { |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| return; |
| } |
| |
| phba->last_ramp_down_time = jiffies; |
| |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| |
| spin_lock_irqsave(&phba->pport->work_port_lock, flags); |
| evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE; |
| if (!evt_posted) |
| phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE; |
| spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); |
| |
| if (!evt_posted) |
| lpfc_worker_wake_up(phba); |
| return; |
| } |
| |
| /** |
| * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread |
| * @phba: The Hba for which this call is being executed. |
| * |
| * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine |
| * post at most 1 event every 5 minute after last_ramp_up_time or |
| * last_rsrc_error_time. This routine wakes up worker thread of @phba |
| * to process WORKER_RAM_DOWN_EVENT event. |
| * |
| * This routine should be called with no lock held. |
| **/ |
| static inline void |
| lpfc_rampup_queue_depth(struct lpfc_vport *vport, |
| uint32_t queue_depth) |
| { |
| unsigned long flags; |
| struct lpfc_hba *phba = vport->phba; |
| uint32_t evt_posted; |
| atomic_inc(&phba->num_cmd_success); |
| |
| if (vport->cfg_lun_queue_depth <= queue_depth) |
| return; |
| spin_lock_irqsave(&phba->hbalock, flags); |
| if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) || |
| ((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) { |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| return; |
| } |
| phba->last_ramp_up_time = jiffies; |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| |
| spin_lock_irqsave(&phba->pport->work_port_lock, flags); |
| evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE; |
| if (!evt_posted) |
| phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE; |
| spin_unlock_irqrestore(&phba->pport->work_port_lock, flags); |
| |
| if (!evt_posted) |
| lpfc_worker_wake_up(phba); |
| return; |
| } |
| |
| /** |
| * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler |
| * @phba: The Hba for which this call is being executed. |
| * |
| * This routine is called to process WORKER_RAMP_DOWN_QUEUE event for worker |
| * thread.This routine reduces queue depth for all scsi device on each vport |
| * associated with @phba. |
| **/ |
| void |
| lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) |
| { |
| struct lpfc_vport **vports; |
| struct Scsi_Host *shost; |
| struct scsi_device *sdev; |
| unsigned long new_queue_depth, old_queue_depth; |
| unsigned long num_rsrc_err, num_cmd_success; |
| int i; |
| struct lpfc_rport_data *rdata; |
| |
| num_rsrc_err = atomic_read(&phba->num_rsrc_err); |
| num_cmd_success = atomic_read(&phba->num_cmd_success); |
| |
| vports = lpfc_create_vport_work_array(phba); |
| if (vports != NULL) |
| for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) { |
| shost = lpfc_shost_from_vport(vports[i]); |
| shost_for_each_device(sdev, shost) { |
| new_queue_depth = |
| sdev->queue_depth * num_rsrc_err / |
| (num_rsrc_err + num_cmd_success); |
| if (!new_queue_depth) |
| new_queue_depth = sdev->queue_depth - 1; |
| else |
| new_queue_depth = sdev->queue_depth - |
| new_queue_depth; |
| old_queue_depth = sdev->queue_depth; |
| if (sdev->ordered_tags) |
| scsi_adjust_queue_depth(sdev, |
| MSG_ORDERED_TAG, |
| new_queue_depth); |
| else |
| scsi_adjust_queue_depth(sdev, |
| MSG_SIMPLE_TAG, |
| new_queue_depth); |
| rdata = sdev->hostdata; |
| if (rdata) |
| lpfc_send_sdev_queuedepth_change_event( |
| phba, vports[i], |
| rdata->pnode, |
| sdev->lun, old_queue_depth, |
| new_queue_depth); |
| } |
| } |
| lpfc_destroy_vport_work_array(phba, vports); |
| atomic_set(&phba->num_rsrc_err, 0); |
| atomic_set(&phba->num_cmd_success, 0); |
| } |
| |
| /** |
| * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler |
| * @phba: The Hba for which this call is being executed. |
| * |
| * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker |
| * thread.This routine increases queue depth for all scsi device on each vport |
| * associated with @phba by 1. This routine also sets @phba num_rsrc_err and |
| * num_cmd_success to zero. |
| **/ |
| void |
| lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) |
| { |
| struct lpfc_vport **vports; |
| struct Scsi_Host *shost; |
| struct scsi_device *sdev; |
| int i; |
| struct lpfc_rport_data *rdata; |
| |
| vports = lpfc_create_vport_work_array(phba); |
| if (vports != NULL) |
| for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) { |
| shost = lpfc_shost_from_vport(vports[i]); |
| shost_for_each_device(sdev, shost) { |
| if (vports[i]->cfg_lun_queue_depth <= |
| sdev->queue_depth) |
| continue; |
| if (sdev->ordered_tags) |
| scsi_adjust_queue_depth(sdev, |
| MSG_ORDERED_TAG, |
| sdev->queue_depth+1); |
| else |
| scsi_adjust_queue_depth(sdev, |
| MSG_SIMPLE_TAG, |
| sdev->queue_depth+1); |
| rdata = sdev->hostdata; |
| if (rdata) |
| lpfc_send_sdev_queuedepth_change_event( |
| phba, vports[i], |
| rdata->pnode, |
| sdev->lun, |
| sdev->queue_depth - 1, |
| sdev->queue_depth); |
| } |
| } |
| lpfc_destroy_vport_work_array(phba, vports); |
| atomic_set(&phba->num_rsrc_err, 0); |
| atomic_set(&phba->num_cmd_success, 0); |
| } |
| |
| /** |
| * lpfc_scsi_dev_block - set all scsi hosts to block state |
| * @phba: Pointer to HBA context object. |
| * |
| * This function walks vport list and set each SCSI host to block state |
| * by invoking fc_remote_port_delete() routine. This function is invoked |
| * with EEH when device's PCI slot has been permanently disabled. |
| **/ |
| void |
| lpfc_scsi_dev_block(struct lpfc_hba *phba) |
| { |
| struct lpfc_vport **vports; |
| struct Scsi_Host *shost; |
| struct scsi_device *sdev; |
| struct fc_rport *rport; |
| int i; |
| |
| vports = lpfc_create_vport_work_array(phba); |
| if (vports != NULL) |
| for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) { |
| shost = lpfc_shost_from_vport(vports[i]); |
| shost_for_each_device(sdev, shost) { |
| rport = starget_to_rport(scsi_target(sdev)); |
| fc_remote_port_delete(rport); |
| } |
| } |
| lpfc_destroy_vport_work_array(phba, vports); |
| } |
| |
| /** |
| * lpfc_new_scsi_buf - Scsi buffer allocator |
| * @vport: The virtual port for which this call being executed. |
| * |
| * This routine allocates a scsi buffer, which contains all the necessary |
| * information needed to initiate a SCSI I/O. The non-DMAable buffer region |
| * contains information to build the IOCB. The DMAable region contains |
| * memory for the FCP CMND, FCP RSP, and the initial BPL. In addition to |
| * allocating memory, the FCP CMND and FCP RSP BDEs are setup in the BPL |
| * and the BPL BDE is setup in the IOCB. |
| * |
| * Return codes: |
| * NULL - Error |
| * Pointer to lpfc_scsi_buf data structure - Success |
| **/ |
| static struct lpfc_scsi_buf * |
| lpfc_new_scsi_buf(struct lpfc_vport *vport) |
| { |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_scsi_buf *psb; |
| struct ulp_bde64 *bpl; |
| IOCB_t *iocb; |
| dma_addr_t pdma_phys_fcp_cmd; |
| dma_addr_t pdma_phys_fcp_rsp; |
| dma_addr_t pdma_phys_bpl; |
| uint16_t iotag; |
| |
| psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); |
| if (!psb) |
| return NULL; |
| |
| /* |
| * Get memory from the pci pool to map the virt space to pci bus space |
| * for an I/O. The DMA buffer includes space for the struct fcp_cmnd, |
| * struct fcp_rsp and the number of bde's necessary to support the |
| * sg_tablesize. |
| */ |
| psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL, |
| &psb->dma_handle); |
| if (!psb->data) { |
| kfree(psb); |
| return NULL; |
| } |
| |
| /* Initialize virtual ptrs to dma_buf region. */ |
| memset(psb->data, 0, phba->cfg_sg_dma_buf_size); |
| |
| /* Allocate iotag for psb->cur_iocbq. */ |
| iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); |
| if (iotag == 0) { |
| pci_pool_free(phba->lpfc_scsi_dma_buf_pool, |
| psb->data, psb->dma_handle); |
| kfree (psb); |
| return NULL; |
| } |
| psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; |
| |
| psb->fcp_cmnd = psb->data; |
| psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); |
| psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + |
| sizeof(struct fcp_rsp); |
| |
| /* Initialize local short-hand pointers. */ |
| bpl = psb->fcp_bpl; |
| pdma_phys_fcp_cmd = psb->dma_handle; |
| pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd); |
| pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) + |
| sizeof(struct fcp_rsp); |
| |
| /* |
| * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg |
| * list bdes. Initialize the first two and leave the rest for |
| * queuecommand. |
| */ |
| bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd)); |
| bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd)); |
| bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd); |
| bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w); |
| |
| /* Setup the physical region for the FCP RSP */ |
| bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp)); |
| bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp)); |
| bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp); |
| bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w); |
| |
| /* |
| * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf, |
| * initialize it with all known data now. |
| */ |
| iocb = &psb->cur_iocbq.iocb; |
| iocb->un.fcpi64.bdl.ulpIoTag32 = 0; |
| if ((phba->sli_rev == 3) && |
| !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { |
| /* fill in immediate fcp command BDE */ |
| iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED; |
| iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); |
| iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t, |
| unsli3.fcp_ext.icd); |
| iocb->un.fcpi64.bdl.addrHigh = 0; |
| iocb->ulpBdeCount = 0; |
| iocb->ulpLe = 0; |
| /* fill in responce BDE */ |
| iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize = |
| sizeof(struct fcp_rsp); |
| iocb->unsli3.fcp_ext.rbde.addrLow = |
| putPaddrLow(pdma_phys_fcp_rsp); |
| iocb->unsli3.fcp_ext.rbde.addrHigh = |
| putPaddrHigh(pdma_phys_fcp_rsp); |
| } else { |
| iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64; |
| iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); |
| iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_bpl); |
| iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_bpl); |
| iocb->ulpBdeCount = 1; |
| iocb->ulpLe = 1; |
| } |
| iocb->ulpClass = CLASS3; |
| |
| return psb; |
| } |
| |
| /** |
| * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list list of Hba |
| * @phba: The Hba for which this call is being executed. |
| * |
| * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list |
| * and returns to caller. |
| * |
| * Return codes: |
| * NULL - Error |
| * Pointer to lpfc_scsi_buf - Success |
| **/ |
| static struct lpfc_scsi_buf* |
| lpfc_get_scsi_buf(struct lpfc_hba * phba) |
| { |
| struct lpfc_scsi_buf * lpfc_cmd = NULL; |
| struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; |
| unsigned long iflag = 0; |
| |
| spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); |
| list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); |
| if (lpfc_cmd) { |
| lpfc_cmd->seg_cnt = 0; |
| lpfc_cmd->nonsg_phys = 0; |
| lpfc_cmd->prot_seg_cnt = 0; |
| } |
| spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); |
| return lpfc_cmd; |
| } |
| |
| /** |
| * lpfc_release_scsi_buf - Return a scsi buffer back to hba's lpfc_scsi_buf_list |
| * @phba: The Hba for which this call is being executed. |
| * @psb: The scsi buffer which is being released. |
| * |
| * This routine releases @psb scsi buffer by adding it to tail of @phba |
| * lpfc_scsi_buf_list list. |
| **/ |
| static void |
| lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) |
| { |
| unsigned long iflag = 0; |
| |
| spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); |
| psb->pCmd = NULL; |
| list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); |
| spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); |
| } |
| |
| /** |
| * lpfc_scsi_prep_dma_buf - Routine to do DMA mapping for scsi buffer |
| * @phba: The Hba for which this call is being executed. |
| * @lpfc_cmd: The scsi buffer which is going to be mapped. |
| * |
| * This routine does the pci dma mapping for scatter-gather list of scsi cmnd |
| * field of @lpfc_cmd. This routine scans through sg elements and format the |
| * bdea. This routine also initializes all IOCB fields which are dependent on |
| * scsi command request buffer. |
| * |
| * Return codes: |
| * 1 - Error |
| * 0 - Success |
| **/ |
| static int |
| lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; |
| struct scatterlist *sgel = NULL; |
| struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; |
| struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; |
| IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; |
| struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde; |
| dma_addr_t physaddr; |
| uint32_t num_bde = 0; |
| int nseg, datadir = scsi_cmnd->sc_data_direction; |
| |
| /* |
| * There are three possibilities here - use scatter-gather segment, use |
| * the single mapping, or neither. Start the lpfc command prep by |
| * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first |
| * data bde entry. |
| */ |
| bpl += 2; |
| if (scsi_sg_count(scsi_cmnd)) { |
| /* |
| * The driver stores the segment count returned from pci_map_sg |
| * because this a count of dma-mappings used to map the use_sg |
| * pages. They are not guaranteed to be the same for those |
| * architectures that implement an IOMMU. |
| */ |
| |
| nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd), |
| scsi_sg_count(scsi_cmnd), datadir); |
| if (unlikely(!nseg)) |
| return 1; |
| |
| lpfc_cmd->seg_cnt = nseg; |
| if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { |
| printk(KERN_ERR "%s: Too many sg segments from " |
| "dma_map_sg. Config %d, seg_cnt %d\n", |
| __func__, phba->cfg_sg_seg_cnt, |
| lpfc_cmd->seg_cnt); |
| scsi_dma_unmap(scsi_cmnd); |
| return 1; |
| } |
| |
| /* |
| * The driver established a maximum scatter-gather segment count |
| * during probe that limits the number of sg elements in any |
| * single scsi command. Just run through the seg_cnt and format |
| * the bde's. |
| * When using SLI-3 the driver will try to fit all the BDEs into |
| * the IOCB. If it can't then the BDEs get added to a BPL as it |
| * does for SLI-2 mode. |
| */ |
| scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { |
| physaddr = sg_dma_address(sgel); |
| if (phba->sli_rev == 3 && |
| !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && |
| nseg <= LPFC_EXT_DATA_BDE_COUNT) { |
| data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| data_bde->tus.f.bdeSize = sg_dma_len(sgel); |
| data_bde->addrLow = putPaddrLow(physaddr); |
| data_bde->addrHigh = putPaddrHigh(physaddr); |
| data_bde++; |
| } else { |
| bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| bpl->tus.f.bdeSize = sg_dma_len(sgel); |
| bpl->tus.w = le32_to_cpu(bpl->tus.w); |
| bpl->addrLow = |
| le32_to_cpu(putPaddrLow(physaddr)); |
| bpl->addrHigh = |
| le32_to_cpu(putPaddrHigh(physaddr)); |
| bpl++; |
| } |
| } |
| } |
| |
| /* |
| * Finish initializing those IOCB fields that are dependent on the |
| * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is |
| * explicitly reinitialized and for SLI-3 the extended bde count is |
| * explicitly reinitialized since all iocb memory resources are reused. |
| */ |
| if (phba->sli_rev == 3 && |
| !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { |
| if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { |
| /* |
| * The extended IOCB format can only fit 3 BDE or a BPL. |
| * This I/O has more than 3 BDE so the 1st data bde will |
| * be a BPL that is filled in here. |
| */ |
| physaddr = lpfc_cmd->dma_handle; |
| data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64; |
| data_bde->tus.f.bdeSize = (num_bde * |
| sizeof(struct ulp_bde64)); |
| physaddr += (sizeof(struct fcp_cmnd) + |
| sizeof(struct fcp_rsp) + |
| (2 * sizeof(struct ulp_bde64))); |
| data_bde->addrHigh = putPaddrHigh(physaddr); |
| data_bde->addrLow = putPaddrLow(physaddr); |
| /* ebde count includes the responce bde and data bpl */ |
| iocb_cmd->unsli3.fcp_ext.ebde_count = 2; |
| } else { |
| /* ebde count includes the responce bde and data bdes */ |
| iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); |
| } |
| } else { |
| iocb_cmd->un.fcpi64.bdl.bdeSize = |
| ((num_bde + 2) * sizeof(struct ulp_bde64)); |
| } |
| fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); |
| |
| /* |
| * Due to difference in data length between DIF/non-DIF paths, |
| * we need to set word 4 of IOCB here |
| */ |
| iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); |
| return 0; |
| } |
| |
| /* |
| * Given a scsi cmnd, determine the BlockGuard profile to be used |
| * with the cmd |
| */ |
| static int |
| lpfc_sc_to_sli_prof(struct scsi_cmnd *sc) |
| { |
| uint8_t guard_type = scsi_host_get_guard(sc->device->host); |
| uint8_t ret_prof = LPFC_PROF_INVALID; |
| |
| if (guard_type == SHOST_DIX_GUARD_IP) { |
| switch (scsi_get_prot_op(sc)) { |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_WRITE_STRIP: |
| ret_prof = LPFC_PROF_AST2; |
| break; |
| |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_WRITE_INSERT: |
| ret_prof = LPFC_PROF_A1; |
| break; |
| |
| case SCSI_PROT_READ_CONVERT: |
| case SCSI_PROT_WRITE_CONVERT: |
| ret_prof = LPFC_PROF_AST1; |
| break; |
| |
| case SCSI_PROT_READ_PASS: |
| case SCSI_PROT_WRITE_PASS: |
| case SCSI_PROT_NORMAL: |
| default: |
| printk(KERN_ERR "Bad op/guard:%d/%d combination\n", |
| scsi_get_prot_op(sc), guard_type); |
| break; |
| |
| } |
| } else if (guard_type == SHOST_DIX_GUARD_CRC) { |
| switch (scsi_get_prot_op(sc)) { |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_WRITE_INSERT: |
| ret_prof = LPFC_PROF_A1; |
| break; |
| |
| case SCSI_PROT_READ_PASS: |
| case SCSI_PROT_WRITE_PASS: |
| ret_prof = LPFC_PROF_C1; |
| break; |
| |
| case SCSI_PROT_READ_CONVERT: |
| case SCSI_PROT_WRITE_CONVERT: |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_WRITE_STRIP: |
| case SCSI_PROT_NORMAL: |
| default: |
| printk(KERN_ERR "Bad op/guard:%d/%d combination\n", |
| scsi_get_prot_op(sc), guard_type); |
| break; |
| } |
| } else { |
| /* unsupported format */ |
| BUG(); |
| } |
| |
| return ret_prof; |
| } |
| |
| struct scsi_dif_tuple { |
| __be16 guard_tag; /* Checksum */ |
| __be16 app_tag; /* Opaque storage */ |
| __be32 ref_tag; /* Target LBA or indirect LBA */ |
| }; |
| |
| static inline unsigned |
| lpfc_cmd_blksize(struct scsi_cmnd *sc) |
| { |
| return sc->device->sector_size; |
| } |
| |
| /** |
| * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command |
| * @sc: in: SCSI command |
| * @apptagmask: out: app tag mask |
| * @apptagval: out: app tag value |
| * @reftag: out: ref tag (reference tag) |
| * |
| * Description: |
| * Extract DIF paramters from the command if possible. Otherwise, |
| * use default paratmers. |
| * |
| **/ |
| static inline void |
| lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask, |
| uint16_t *apptagval, uint32_t *reftag) |
| { |
| struct scsi_dif_tuple *spt; |
| unsigned char op = scsi_get_prot_op(sc); |
| unsigned int protcnt = scsi_prot_sg_count(sc); |
| static int cnt; |
| |
| if (protcnt && (op == SCSI_PROT_WRITE_STRIP || |
| op == SCSI_PROT_WRITE_PASS || |
| op == SCSI_PROT_WRITE_CONVERT)) { |
| |
| cnt++; |
| spt = page_address(sg_page(scsi_prot_sglist(sc))) + |
| scsi_prot_sglist(sc)[0].offset; |
| *apptagmask = 0; |
| *apptagval = 0; |
| *reftag = cpu_to_be32(spt->ref_tag); |
| |
| } else { |
| /* SBC defines ref tag to be lower 32bits of LBA */ |
| *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc)); |
| *apptagmask = 0; |
| *apptagval = 0; |
| } |
| } |
| |
| /* |
| * This function sets up buffer list for protection groups of |
| * type LPFC_PG_TYPE_NO_DIF |
| * |
| * This is usually used when the HBA is instructed to generate |
| * DIFs and insert them into data stream (or strip DIF from |
| * incoming data stream) |
| * |
| * The buffer list consists of just one protection group described |
| * below: |
| * +-------------------------+ |
| * start of prot group --> | PDE_1 | |
| * +-------------------------+ |
| * | Data BDE | |
| * +-------------------------+ |
| * |more Data BDE's ... (opt)| |
| * +-------------------------+ |
| * |
| * @sc: pointer to scsi command we're working on |
| * @bpl: pointer to buffer list for protection groups |
| * @datacnt: number of segments of data that have been dma mapped |
| * |
| * Note: Data s/g buffers have been dma mapped |
| */ |
| static int |
| lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, |
| struct ulp_bde64 *bpl, int datasegcnt) |
| { |
| struct scatterlist *sgde = NULL; /* s/g data entry */ |
| struct lpfc_pde *pde1 = NULL; |
| dma_addr_t physaddr; |
| int i = 0, num_bde = 0; |
| int datadir = sc->sc_data_direction; |
| int prof = LPFC_PROF_INVALID; |
| unsigned blksize; |
| uint32_t reftag; |
| uint16_t apptagmask, apptagval; |
| |
| pde1 = (struct lpfc_pde *) bpl; |
| prof = lpfc_sc_to_sli_prof(sc); |
| |
| if (prof == LPFC_PROF_INVALID) |
| goto out; |
| |
| /* extract some info from the scsi command for PDE1*/ |
| blksize = lpfc_cmd_blksize(sc); |
| lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag); |
| |
| /* setup PDE1 with what we have */ |
| lpfc_pde_set_bg_parms(pde1, LPFC_PDE1_DESCRIPTOR, prof, blksize, |
| BG_EC_STOP_ERR); |
| lpfc_pde_set_dif_parms(pde1, apptagmask, apptagval, reftag); |
| |
| num_bde++; |
| bpl++; |
| |
| /* assumption: caller has already run dma_map_sg on command data */ |
| scsi_for_each_sg(sc, sgde, datasegcnt, i) { |
| physaddr = sg_dma_address(sgde); |
| bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); |
| bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); |
| bpl->tus.f.bdeSize = sg_dma_len(sgde); |
| if (datadir == DMA_TO_DEVICE) |
| bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| else |
| bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; |
| bpl->tus.w = le32_to_cpu(bpl->tus.w); |
| bpl++; |
| num_bde++; |
| } |
| |
| out: |
| return num_bde; |
| } |
| |
| /* |
| * This function sets up buffer list for protection groups of |
| * type LPFC_PG_TYPE_DIF_BUF |
| * |
| * This is usually used when DIFs are in their own buffers, |
| * separate from the data. The HBA can then by instructed |
| * to place the DIFs in the outgoing stream. For read operations, |
| * The HBA could extract the DIFs and place it in DIF buffers. |
| * |
| * The buffer list for this type consists of one or more of the |
| * protection groups described below: |
| * +-------------------------+ |
| * start of first prot group --> | PDE_1 | |
| * +-------------------------+ |
| * | PDE_3 (Prot BDE) | |
| * +-------------------------+ |
| * | Data BDE | |
| * +-------------------------+ |
| * |more Data BDE's ... (opt)| |
| * +-------------------------+ |
| * start of new prot group --> | PDE_1 | |
| * +-------------------------+ |
| * | ... | |
| * +-------------------------+ |
| * |
| * @sc: pointer to scsi command we're working on |
| * @bpl: pointer to buffer list for protection groups |
| * @datacnt: number of segments of data that have been dma mapped |
| * @protcnt: number of segment of protection data that have been dma mapped |
| * |
| * Note: It is assumed that both data and protection s/g buffers have been |
| * mapped for DMA |
| */ |
| static int |
| lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, |
| struct ulp_bde64 *bpl, int datacnt, int protcnt) |
| { |
| struct scatterlist *sgde = NULL; /* s/g data entry */ |
| struct scatterlist *sgpe = NULL; /* s/g prot entry */ |
| struct lpfc_pde *pde1 = NULL; |
| struct ulp_bde64 *prot_bde = NULL; |
| dma_addr_t dataphysaddr, protphysaddr; |
| unsigned short curr_data = 0, curr_prot = 0; |
| unsigned int split_offset, protgroup_len; |
| unsigned int protgrp_blks, protgrp_bytes; |
| unsigned int remainder, subtotal; |
| int prof = LPFC_PROF_INVALID; |
| int datadir = sc->sc_data_direction; |
| unsigned char pgdone = 0, alldone = 0; |
| unsigned blksize; |
| uint32_t reftag; |
| uint16_t apptagmask, apptagval; |
| int num_bde = 0; |
| |
| sgpe = scsi_prot_sglist(sc); |
| sgde = scsi_sglist(sc); |
| |
| if (!sgpe || !sgde) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", |
| sgpe, sgde); |
| return 0; |
| } |
| |
| prof = lpfc_sc_to_sli_prof(sc); |
| if (prof == LPFC_PROF_INVALID) |
| goto out; |
| |
| /* extract some info from the scsi command for PDE1*/ |
| blksize = lpfc_cmd_blksize(sc); |
| lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag); |
| |
| split_offset = 0; |
| do { |
| /* setup the first PDE_1 */ |
| pde1 = (struct lpfc_pde *) bpl; |
| |
| lpfc_pde_set_bg_parms(pde1, LPFC_PDE1_DESCRIPTOR, prof, blksize, |
| BG_EC_STOP_ERR); |
| lpfc_pde_set_dif_parms(pde1, apptagmask, apptagval, reftag); |
| |
| num_bde++; |
| bpl++; |
| |
| /* setup the first BDE that points to protection buffer */ |
| prot_bde = (struct ulp_bde64 *) bpl; |
| protphysaddr = sg_dma_address(sgpe); |
| prot_bde->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); |
| prot_bde->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); |
| protgroup_len = sg_dma_len(sgpe); |
| |
| |
| /* must be integer multiple of the DIF block length */ |
| BUG_ON(protgroup_len % 8); |
| |
| protgrp_blks = protgroup_len / 8; |
| protgrp_bytes = protgrp_blks * blksize; |
| |
| prot_bde->tus.f.bdeSize = protgroup_len; |
| if (datadir == DMA_TO_DEVICE) |
| prot_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| else |
| prot_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; |
| prot_bde->tus.w = le32_to_cpu(bpl->tus.w); |
| |
| curr_prot++; |
| num_bde++; |
| |
| /* setup BDE's for data blocks associated with DIF data */ |
| pgdone = 0; |
| subtotal = 0; /* total bytes processed for current prot grp */ |
| while (!pgdone) { |
| if (!sgde) { |
| printk(KERN_ERR "%s Invalid data segment\n", |
| __func__); |
| return 0; |
| } |
| bpl++; |
| dataphysaddr = sg_dma_address(sgde) + split_offset; |
| bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); |
| bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); |
| |
| remainder = sg_dma_len(sgde) - split_offset; |
| |
| if ((subtotal + remainder) <= protgrp_bytes) { |
| /* we can use this whole buffer */ |
| bpl->tus.f.bdeSize = remainder; |
| split_offset = 0; |
| |
| if ((subtotal + remainder) == protgrp_bytes) |
| pgdone = 1; |
| } else { |
| /* must split this buffer with next prot grp */ |
| bpl->tus.f.bdeSize = protgrp_bytes - subtotal; |
| split_offset += bpl->tus.f.bdeSize; |
| } |
| |
| subtotal += bpl->tus.f.bdeSize; |
| |
| if (datadir == DMA_TO_DEVICE) |
| bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| else |
| bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; |
| bpl->tus.w = le32_to_cpu(bpl->tus.w); |
| |
| num_bde++; |
| curr_data++; |
| |
| if (split_offset) |
| break; |
| |
| /* Move to the next s/g segment if possible */ |
| sgde = sg_next(sgde); |
| } |
| |
| /* are we done ? */ |
| if (curr_prot == protcnt) { |
| alldone = 1; |
| } else if (curr_prot < protcnt) { |
| /* advance to next prot buffer */ |
| sgpe = sg_next(sgpe); |
| bpl++; |
| |
| /* update the reference tag */ |
| reftag += protgrp_blks; |
| } else { |
| /* if we're here, we have a bug */ |
| printk(KERN_ERR "BLKGRD: bug in %s\n", __func__); |
| } |
| |
| } while (!alldone); |
| |
| out: |
| |
| |
| return num_bde; |
| } |
| /* |
| * Given a SCSI command that supports DIF, determine composition of protection |
| * groups involved in setting up buffer lists |
| * |
| * Returns: |
| * for DIF (for both read and write) |
| * */ |
| static int |
| lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) |
| { |
| int ret = LPFC_PG_TYPE_INVALID; |
| unsigned char op = scsi_get_prot_op(sc); |
| |
| switch (op) { |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_WRITE_INSERT: |
| ret = LPFC_PG_TYPE_NO_DIF; |
| break; |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_WRITE_STRIP: |
| case SCSI_PROT_READ_PASS: |
| case SCSI_PROT_WRITE_PASS: |
| case SCSI_PROT_WRITE_CONVERT: |
| case SCSI_PROT_READ_CONVERT: |
| ret = LPFC_PG_TYPE_DIF_BUF; |
| break; |
| default: |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9021 Unsupported protection op:%d\n", op); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * This is the protection/DIF aware version of |
| * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the |
| * two functions eventually, but for now, it's here |
| */ |
| static int |
| lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, |
| struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; |
| struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; |
| struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; |
| IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; |
| uint32_t num_bde = 0; |
| int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; |
| int prot_group_type = 0; |
| int diflen, fcpdl; |
| unsigned blksize; |
| |
| /* |
| * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd |
| * fcp_rsp regions to the first data bde entry |
| */ |
| bpl += 2; |
| if (scsi_sg_count(scsi_cmnd)) { |
| /* |
| * The driver stores the segment count returned from pci_map_sg |
| * because this a count of dma-mappings used to map the use_sg |
| * pages. They are not guaranteed to be the same for those |
| * architectures that implement an IOMMU. |
| */ |
| datasegcnt = dma_map_sg(&phba->pcidev->dev, |
| scsi_sglist(scsi_cmnd), |
| scsi_sg_count(scsi_cmnd), datadir); |
| if (unlikely(!datasegcnt)) |
| return 1; |
| |
| lpfc_cmd->seg_cnt = datasegcnt; |
| if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { |
| printk(KERN_ERR "%s: Too many sg segments from " |
| "dma_map_sg. Config %d, seg_cnt %d\n", |
| __func__, phba->cfg_sg_seg_cnt, |
| lpfc_cmd->seg_cnt); |
| scsi_dma_unmap(scsi_cmnd); |
| return 1; |
| } |
| |
| prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); |
| |
| switch (prot_group_type) { |
| case LPFC_PG_TYPE_NO_DIF: |
| num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, |
| datasegcnt); |
| /* we shoud have 2 or more entries in buffer list */ |
| if (num_bde < 2) |
| goto err; |
| break; |
| case LPFC_PG_TYPE_DIF_BUF:{ |
| /* |
| * This type indicates that protection buffers are |
| * passed to the driver, so that needs to be prepared |
| * for DMA |
| */ |
| protsegcnt = dma_map_sg(&phba->pcidev->dev, |
| scsi_prot_sglist(scsi_cmnd), |
| scsi_prot_sg_count(scsi_cmnd), datadir); |
| if (unlikely(!protsegcnt)) { |
| scsi_dma_unmap(scsi_cmnd); |
| return 1; |
| } |
| |
| lpfc_cmd->prot_seg_cnt = protsegcnt; |
| if (lpfc_cmd->prot_seg_cnt |
| > phba->cfg_prot_sg_seg_cnt) { |
| printk(KERN_ERR "%s: Too many prot sg segments " |
| "from dma_map_sg. Config %d," |
| "prot_seg_cnt %d\n", __func__, |
| phba->cfg_prot_sg_seg_cnt, |
| lpfc_cmd->prot_seg_cnt); |
| dma_unmap_sg(&phba->pcidev->dev, |
| scsi_prot_sglist(scsi_cmnd), |
| scsi_prot_sg_count(scsi_cmnd), |
| datadir); |
| scsi_dma_unmap(scsi_cmnd); |
| return 1; |
| } |
| |
| num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, |
| datasegcnt, protsegcnt); |
| /* we shoud have 3 or more entries in buffer list */ |
| if (num_bde < 3) |
| goto err; |
| break; |
| } |
| case LPFC_PG_TYPE_INVALID: |
| default: |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9022 Unexpected protection group %i\n", |
| prot_group_type); |
| return 1; |
| } |
| } |
| |
| /* |
| * Finish initializing those IOCB fields that are dependent on the |
| * scsi_cmnd request_buffer. Note that the bdeSize is explicitly |
| * reinitialized since all iocb memory resources are used many times |
| * for transmit, receive, and continuation bpl's. |
| */ |
| iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); |
| iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); |
| iocb_cmd->ulpBdeCount = 1; |
| iocb_cmd->ulpLe = 1; |
| |
| fcpdl = scsi_bufflen(scsi_cmnd); |
| |
| if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) { |
| /* |
| * We are in DIF Type 1 mode |
| * Every data block has a 8 byte DIF (trailer) |
| * attached to it. Must ajust FCP data length |
| */ |
| blksize = lpfc_cmd_blksize(scsi_cmnd); |
| diflen = (fcpdl / blksize) * 8; |
| fcpdl += diflen; |
| } |
| fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); |
| |
| /* |
| * Due to difference in data length between DIF/non-DIF paths, |
| * we need to set word 4 of IOCB here |
| */ |
| iocb_cmd->un.fcpi.fcpi_parm = fcpdl; |
| |
| return 0; |
| err: |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9023 Could not setup all needed BDE's" |
| "prot_group_type=%d, num_bde=%d\n", |
| prot_group_type, num_bde); |
| return 1; |
| } |
| |
| /* |
| * This function checks for BlockGuard errors detected by |
| * the HBA. In case of errors, the ASC/ASCQ fields in the |
| * sense buffer will be set accordingly, paired with |
| * ILLEGAL_REQUEST to signal to the kernel that the HBA |
| * detected corruption. |
| * |
| * Returns: |
| * 0 - No error found |
| * 1 - BlockGuard error found |
| * -1 - Internal error (bad profile, ...etc) |
| */ |
| static int |
| lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, |
| struct lpfc_iocbq *pIocbOut) |
| { |
| struct scsi_cmnd *cmd = lpfc_cmd->pCmd; |
| struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; |
| int ret = 0; |
| uint32_t bghm = bgf->bghm; |
| uint32_t bgstat = bgf->bgstat; |
| uint64_t failing_sector = 0; |
| |
| printk(KERN_ERR "BG ERROR in cmd 0x%x lba 0x%llx blk cnt 0x%lx " |
| "bgstat=0x%x bghm=0x%x\n", |
| cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd), |
| cmd->request->nr_sectors, bgstat, bghm); |
| |
| spin_lock(&_dump_buf_lock); |
| if (!_dump_buf_done) { |
| printk(KERN_ERR "Saving Data for %u blocks to debugfs\n", |
| (cmd->cmnd[7] << 8 | cmd->cmnd[8])); |
| lpfc_debug_save_data(cmd); |
| |
| /* If we have a prot sgl, save the DIF buffer */ |
| if (lpfc_prot_group_type(phba, cmd) == |
| LPFC_PG_TYPE_DIF_BUF) { |
| printk(KERN_ERR "Saving DIF for %u blocks to debugfs\n", |
| (cmd->cmnd[7] << 8 | cmd->cmnd[8])); |
| lpfc_debug_save_dif(cmd); |
| } |
| |
| _dump_buf_done = 1; |
| } |
| spin_unlock(&_dump_buf_lock); |
| |
| if (lpfc_bgs_get_invalid_prof(bgstat)) { |
| cmd->result = ScsiResult(DID_ERROR, 0); |
| printk(KERN_ERR "Invalid BlockGuard profile. bgstat:0x%x\n", |
| bgstat); |
| ret = (-1); |
| goto out; |
| } |
| |
| if (lpfc_bgs_get_uninit_dif_block(bgstat)) { |
| cmd->result = ScsiResult(DID_ERROR, 0); |
| printk(KERN_ERR "Invalid BlockGuard DIF Block. bgstat:0x%x\n", |
| bgstat); |
| ret = (-1); |
| goto out; |
| } |
| |
| if (lpfc_bgs_get_guard_err(bgstat)) { |
| ret = 1; |
| |
| scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, |
| 0x10, 0x1); |
| cmd->result = DRIVER_SENSE << 24 |
| | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); |
| phba->bg_guard_err_cnt++; |
| printk(KERN_ERR "BLKGRD: guard_tag error\n"); |
| } |
| |
| if (lpfc_bgs_get_reftag_err(bgstat)) { |
| ret = 1; |
| |
| scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, |
| 0x10, 0x3); |
| cmd->result = DRIVER_SENSE << 24 |
| | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); |
| |
| phba->bg_reftag_err_cnt++; |
| printk(KERN_ERR "BLKGRD: ref_tag error\n"); |
| } |
| |
| if (lpfc_bgs_get_apptag_err(bgstat)) { |
| ret = 1; |
| |
| scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, |
| 0x10, 0x2); |
| cmd->result = DRIVER_SENSE << 24 |
| | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); |
| |
| phba->bg_apptag_err_cnt++; |
| printk(KERN_ERR "BLKGRD: app_tag error\n"); |
| } |
| |
| if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { |
| /* |
| * setup sense data descriptor 0 per SPC-4 as an information |
| * field, and put the failing LBA in it |
| */ |
| cmd->sense_buffer[8] = 0; /* Information */ |
| cmd->sense_buffer[9] = 0xa; /* Add. length */ |
| bghm /= cmd->device->sector_size; |
| |
| failing_sector = scsi_get_lba(cmd); |
| failing_sector += bghm; |
| |
| put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]); |
| } |
| |
| if (!ret) { |
| /* No error was reported - problem in FW? */ |
| cmd->result = ScsiResult(DID_ERROR, 0); |
| printk(KERN_ERR "BLKGRD: no errors reported!\n"); |
| } |
| |
| out: |
| return ret; |
| } |
| |
| /** |
| * lpfc_send_scsi_error_event - Posts an event when there is SCSI error |
| * @phba: Pointer to hba context object. |
| * @vport: Pointer to vport object. |
| * @lpfc_cmd: Pointer to lpfc scsi command which reported the error. |
| * @rsp_iocb: Pointer to response iocb object which reported error. |
| * |
| * This function posts an event when there is a SCSI command reporting |
| * error from the scsi device. |
| **/ |
| static void |
| lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, |
| struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) { |
| struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; |
| struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; |
| uint32_t resp_info = fcprsp->rspStatus2; |
| uint32_t scsi_status = fcprsp->rspStatus3; |
| uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; |
| struct lpfc_fast_path_event *fast_path_evt = NULL; |
| struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode; |
| unsigned long flags; |
| |
| /* If there is queuefull or busy condition send a scsi event */ |
| if ((cmnd->result == SAM_STAT_TASK_SET_FULL) || |
| (cmnd->result == SAM_STAT_BUSY)) { |
| fast_path_evt = lpfc_alloc_fast_evt(phba); |
| if (!fast_path_evt) |
| return; |
| fast_path_evt->un.scsi_evt.event_type = |
| FC_REG_SCSI_EVENT; |
| fast_path_evt->un.scsi_evt.subcategory = |
| (cmnd->result == SAM_STAT_TASK_SET_FULL) ? |
| LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY; |
| fast_path_evt->un.scsi_evt.lun = cmnd->device->lun; |
| memcpy(&fast_path_evt->un.scsi_evt.wwpn, |
| &pnode->nlp_portname, sizeof(struct lpfc_name)); |
| memcpy(&fast_path_evt->un.scsi_evt.wwnn, |
| &pnode->nlp_nodename, sizeof(struct lpfc_name)); |
| } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen && |
| ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) { |
| fast_path_evt = lpfc_alloc_fast_evt(phba); |
| if (!fast_path_evt) |
| return; |
| fast_path_evt->un.check_cond_evt.scsi_event.event_type = |
| FC_REG_SCSI_EVENT; |
| fast_path_evt->un.check_cond_evt.scsi_event.subcategory = |
| LPFC_EVENT_CHECK_COND; |
| fast_path_evt->un.check_cond_evt.scsi_event.lun = |
| cmnd->device->lun; |
| memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn, |
| &pnode->nlp_portname, sizeof(struct lpfc_name)); |
| memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn, |
| &pnode->nlp_nodename, sizeof(struct lpfc_name)); |
| fast_path_evt->un.check_cond_evt.sense_key = |
| cmnd->sense_buffer[2] & 0xf; |
| fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12]; |
| fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13]; |
| } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && |
| fcpi_parm && |
| ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) || |
| ((scsi_status == SAM_STAT_GOOD) && |
| !(resp_info & (RESID_UNDER | RESID_OVER))))) { |
| /* |
| * If status is good or resid does not match with fcp_param and |
| * there is valid fcpi_parm, then there is a read_check error |
| */ |
| fast_path_evt = lpfc_alloc_fast_evt(phba); |
| if (!fast_path_evt) |
| return; |
| fast_path_evt->un.read_check_error.header.event_type = |
| FC_REG_FABRIC_EVENT; |
| fast_path_evt->un.read_check_error.header.subcategory = |
| LPFC_EVENT_FCPRDCHKERR; |
| memcpy(&fast_path_evt->un.read_check_error.header.wwpn, |
| &pnode->nlp_portname, sizeof(struct lpfc_name)); |
| memcpy(&fast_path_evt->un.read_check_error.header.wwnn, |
| &pnode->nlp_nodename, sizeof(struct lpfc_name)); |
| fast_path_evt->un.read_check_error.lun = cmnd->device->lun; |
| fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0]; |
| fast_path_evt->un.read_check_error.fcpiparam = |
| fcpi_parm; |
| } else |
| return; |
| |
| fast_path_evt->vport = vport; |
| spin_lock_irqsave(&phba->hbalock, flags); |
| list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list); |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| lpfc_worker_wake_up(phba); |
| return; |
| } |
| |
| /** |
| * lpfc_scsi_unprep_dma_buf - Routine to un-map DMA mapping of scatter gather |
| * @phba: The Hba for which this call is being executed. |
| * @psb: The scsi buffer which is going to be un-mapped. |
| * |
| * This routine does DMA un-mapping of scatter gather list of scsi command |
| * field of @lpfc_cmd. |
| **/ |
| static void |
| lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb) |
| { |
| /* |
| * There are only two special cases to consider. (1) the scsi command |
| * requested scatter-gather usage or (2) the scsi command allocated |
| * a request buffer, but did not request use_sg. There is a third |
| * case, but it does not require resource deallocation. |
| */ |
| if (psb->seg_cnt > 0) |
| scsi_dma_unmap(psb->pCmd); |
| if (psb->prot_seg_cnt > 0) |
| dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), |
| scsi_prot_sg_count(psb->pCmd), |
| psb->pCmd->sc_data_direction); |
| } |
| |
| /** |
| * lpfc_handler_fcp_err - FCP response handler |
| * @vport: The virtual port for which this call is being executed. |
| * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. |
| * @rsp_iocb: The response IOCB which contains FCP error. |
| * |
| * This routine is called to process response IOCB with status field |
| * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command |
| * based upon SCSI and FCP error. |
| **/ |
| static void |
| lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, |
| struct lpfc_iocbq *rsp_iocb) |
| { |
| struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; |
| struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; |
| struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; |
| uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm; |
| uint32_t resp_info = fcprsp->rspStatus2; |
| uint32_t scsi_status = fcprsp->rspStatus3; |
| uint32_t *lp; |
| uint32_t host_status = DID_OK; |
| uint32_t rsplen = 0; |
| uint32_t logit = LOG_FCP | LOG_FCP_ERROR; |
| |
| |
| /* |
| * If this is a task management command, there is no |
| * scsi packet associated with this lpfc_cmd. The driver |
| * consumes it. |
| */ |
| if (fcpcmd->fcpCntl2) { |
| scsi_status = 0; |
| goto out; |
| } |
| |
| if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { |
| uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); |
| if (snslen > SCSI_SENSE_BUFFERSIZE) |
| snslen = SCSI_SENSE_BUFFERSIZE; |
| |
| if (resp_info & RSP_LEN_VALID) |
| rsplen = be32_to_cpu(fcprsp->rspRspLen); |
| memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); |
| } |
| lp = (uint32_t *)cmnd->sense_buffer; |
| |
| if (!scsi_status && (resp_info & RESID_UNDER)) |
| logit = LOG_FCP; |
| |
| lpfc_printf_vlog(vport, KERN_WARNING, logit, |
| "9024 FCP command x%x failed: x%x SNS x%x x%x " |
| "Data: x%x x%x x%x x%x x%x\n", |
| cmnd->cmnd[0], scsi_status, |
| be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, |
| be32_to_cpu(fcprsp->rspResId), |
| be32_to_cpu(fcprsp->rspSnsLen), |
| be32_to_cpu(fcprsp->rspRspLen), |
| fcprsp->rspInfo3); |
| |
| if (resp_info & RSP_LEN_VALID) { |
| rsplen = be32_to_cpu(fcprsp->rspRspLen); |
| if ((rsplen != 0 && rsplen != 4 && rsplen != 8) || |
| (fcprsp->rspInfo3 != RSP_NO_FAILURE)) { |
| host_status = DID_ERROR; |
| goto out; |
| } |
| } |
| |
| scsi_set_resid(cmnd, 0); |
| if (resp_info & RESID_UNDER) { |
| scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); |
| |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "9025 FCP Read Underrun, expected %d, " |
| "residual %d Data: x%x x%x x%x\n", |
| be32_to_cpu(fcpcmd->fcpDl), |
| scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], |
| cmnd->underflow); |
| |
| /* |
| * If there is an under run check if under run reported by |
| * storage array is same as the under run reported by HBA. |
| * If this is not same, there is a dropped frame. |
| */ |
| if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) && |
| fcpi_parm && |
| (scsi_get_resid(cmnd) != fcpi_parm)) { |
| lpfc_printf_vlog(vport, KERN_WARNING, |
| LOG_FCP | LOG_FCP_ERROR, |
| "9026 FCP Read Check Error " |
| "and Underrun Data: x%x x%x x%x x%x\n", |
| be32_to_cpu(fcpcmd->fcpDl), |
| scsi_get_resid(cmnd), fcpi_parm, |
| cmnd->cmnd[0]); |
| scsi_set_resid(cmnd, scsi_bufflen(cmnd)); |
| host_status = DID_ERROR; |
| } |
| /* |
| * The cmnd->underflow is the minimum number of bytes that must |
| * be transfered for this command. Provided a sense condition |
| * is not present, make sure the actual amount transferred is at |
| * least the underflow value or fail. |
| */ |
| if (!(resp_info & SNS_LEN_VALID) && |
| (scsi_status == SAM_STAT_GOOD) && |
| (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) |
| < cmnd->underflow)) { |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "9027 FCP command x%x residual " |
| "underrun converted to error " |
| "Data: x%x x%x x%x\n", |
| cmnd->cmnd[0], scsi_bufflen(cmnd), |
| scsi_get_resid(cmnd), cmnd->underflow); |
| host_status = DID_ERROR; |
| } |
| } else if (resp_info & RESID_OVER) { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "9028 FCP command x%x residual overrun error. " |
| "Data: x%x x%x \n", cmnd->cmnd[0], |
| scsi_bufflen(cmnd), scsi_get_resid(cmnd)); |
| host_status = DID_ERROR; |
| |
| /* |
| * Check SLI validation that all the transfer was actually done |
| * (fcpi_parm should be zero). Apply check only to reads. |
| */ |
| } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm && |
| (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, |
| "9029 FCP Read Check Error Data: " |
| "x%x x%x x%x x%x\n", |
| be32_to_cpu(fcpcmd->fcpDl), |
| be32_to_cpu(fcprsp->rspResId), |
| fcpi_parm, cmnd->cmnd[0]); |
| host_status = DID_ERROR; |
| scsi_set_resid(cmnd, scsi_bufflen(cmnd)); |
| } |
| |
| out: |
| cmnd->result = ScsiResult(host_status, scsi_status); |
| lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); |
| } |
| |
| /** |
| * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine |
| * @phba: The Hba for which this call is being executed. |
| * @pIocbIn: The command IOCBQ for the scsi cmnd. |
| * @pIocbOut: The response IOCBQ for the scsi cmnd . |
| * |
| * This routine assigns scsi command result by looking into response IOCB |
| * status field appropriately. This routine handles QUEUE FULL condition as |
| * well by ramping down device queue depth. |
| **/ |
| static void |
| lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, |
| struct lpfc_iocbq *pIocbOut) |
| { |
| struct lpfc_scsi_buf *lpfc_cmd = |
| (struct lpfc_scsi_buf *) pIocbIn->context1; |
| struct lpfc_vport *vport = pIocbIn->vport; |
| struct lpfc_rport_data *rdata = lpfc_cmd->rdata; |
| struct lpfc_nodelist *pnode = rdata->pnode; |
| struct scsi_cmnd *cmd = lpfc_cmd->pCmd; |
| int result; |
| struct scsi_device *tmp_sdev; |
| int depth = 0; |
| unsigned long flags; |
| struct lpfc_fast_path_event *fast_path_evt; |
| struct Scsi_Host *shost = cmd->device->host; |
| uint32_t queue_depth, scsi_id; |
| |
| lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; |
| lpfc_cmd->status = pIocbOut->iocb.ulpStatus; |
| if (pnode && NLP_CHK_NODE_ACT(pnode)) |
| atomic_dec(&pnode->cmd_pending); |
| |
| if (lpfc_cmd->status) { |
| if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && |
| (lpfc_cmd->result & IOERR_DRVR_MASK)) |
| lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
| else if (lpfc_cmd->status >= IOSTAT_CNT) |
| lpfc_cmd->status = IOSTAT_DEFAULT; |
| |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "9030 FCP cmd x%x failed <%d/%d> " |
| "status: x%x result: x%x Data: x%x x%x\n", |
| cmd->cmnd[0], |
| cmd->device ? cmd->device->id : 0xffff, |
| cmd->device ? cmd->device->lun : 0xffff, |
| lpfc_cmd->status, lpfc_cmd->result, |
| pIocbOut->iocb.ulpContext, |
| lpfc_cmd->cur_iocbq.iocb.ulpIoTag); |
| |
| switch (lpfc_cmd->status) { |
| case IOSTAT_FCP_RSP_ERROR: |
| /* Call FCP RSP handler to determine result */ |
| lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut); |
| break; |
| case IOSTAT_NPORT_BSY: |
| case IOSTAT_FABRIC_BSY: |
| cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); |
| fast_path_evt = lpfc_alloc_fast_evt(phba); |
| if (!fast_path_evt) |
| break; |
| fast_path_evt->un.fabric_evt.event_type = |
| FC_REG_FABRIC_EVENT; |
| fast_path_evt->un.fabric_evt.subcategory = |
| (lpfc_cmd->status == IOSTAT_NPORT_BSY) ? |
| LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY; |
| if (pnode && NLP_CHK_NODE_ACT(pnode)) { |
| memcpy(&fast_path_evt->un.fabric_evt.wwpn, |
| &pnode->nlp_portname, |
| sizeof(struct lpfc_name)); |
| memcpy(&fast_path_evt->un.fabric_evt.wwnn, |
| &pnode->nlp_nodename, |
| sizeof(struct lpfc_name)); |
| } |
| fast_path_evt->vport = vport; |
| fast_path_evt->work_evt.evt = |
| LPFC_EVT_FASTPATH_MGMT_EVT; |
| spin_lock_irqsave(&phba->hbalock, flags); |
| list_add_tail(&fast_path_evt->work_evt.evt_listp, |
| &phba->work_list); |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| lpfc_worker_wake_up(phba); |
| break; |
| case IOSTAT_LOCAL_REJECT: |
| if (lpfc_cmd->result == IOERR_INVALID_RPI || |
| lpfc_cmd->result == IOERR_NO_RESOURCES || |
| lpfc_cmd->result == IOERR_ABORT_REQUESTED) { |
| cmd->result = ScsiResult(DID_REQUEUE, 0); |
| break; |
| } |
| |
| if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || |
| lpfc_cmd->result == IOERR_TX_DMA_FAILED) && |
| pIocbOut->iocb.unsli3.sli3_bg.bgstat) { |
| if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { |
| /* |
| * This is a response for a BG enabled |
| * cmd. Parse BG error |
| */ |
| lpfc_parse_bg_err(phba, lpfc_cmd, |
| pIocbOut); |
| break; |
| } else { |
| lpfc_printf_vlog(vport, KERN_WARNING, |
| LOG_BG, |
| "9031 non-zero BGSTAT " |
| "on unprotected cmd"); |
| } |
| } |
| |
| /* else: fall through */ |
| default: |
| cmd->result = ScsiResult(DID_ERROR, 0); |
| break; |
| } |
| |
| if (!pnode || !NLP_CHK_NODE_ACT(pnode) |
| || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) |
| cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, |
| SAM_STAT_BUSY); |
| } else { |
| cmd->result = ScsiResult(DID_OK, 0); |
| } |
| |
| if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { |
| uint32_t *lp = (uint32_t *)cmd->sense_buffer; |
| |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0710 Iodone <%d/%d> cmd %p, error " |
| "x%x SNS x%x x%x Data: x%x x%x\n", |
| cmd->device->id, cmd->device->lun, cmd, |
| cmd->result, *lp, *(lp + 3), cmd->retries, |
| scsi_get_resid(cmd)); |
| } |
| |
| lpfc_update_stats(phba, lpfc_cmd); |
| result = cmd->result; |
| if (vport->cfg_max_scsicmpl_time && |
| time_after(jiffies, lpfc_cmd->start_time + |
| msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (pnode && NLP_CHK_NODE_ACT(pnode)) { |
| if (pnode->cmd_qdepth > |
| atomic_read(&pnode->cmd_pending) && |
| (atomic_read(&pnode->cmd_pending) > |
| LPFC_MIN_TGT_QDEPTH) && |
| ((cmd->cmnd[0] == READ_10) || |
| (cmd->cmnd[0] == WRITE_10))) |
| pnode->cmd_qdepth = |
| atomic_read(&pnode->cmd_pending); |
| |
| pnode->last_change_time = jiffies; |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { |
| if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) && |
| time_after(jiffies, pnode->last_change_time + |
| msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { |
| spin_lock_irqsave(shost->host_lock, flags); |
| pnode->cmd_qdepth += pnode->cmd_qdepth * |
| LPFC_TGTQ_RAMPUP_PCENT / 100; |
| if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH) |
| pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH; |
| pnode->last_change_time = jiffies; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| } |
| |
| lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); |
| |
| /* The sdev is not guaranteed to be valid post scsi_done upcall. */ |
| queue_depth = cmd->device->queue_depth; |
| scsi_id = cmd->device->id; |
| cmd->scsi_done(cmd); |
| |
| if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { |
| /* |
| * If there is a thread waiting for command completion |
| * wake up the thread. |
| */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| lpfc_cmd->pCmd = NULL; |
| if (lpfc_cmd->waitq) |
| wake_up(lpfc_cmd->waitq); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| return; |
| } |
| |
| |
| if (!result) |
| lpfc_rampup_queue_depth(vport, queue_depth); |
| |
| if (!result && pnode && NLP_CHK_NODE_ACT(pnode) && |
| ((jiffies - pnode->last_ramp_up_time) > |
| LPFC_Q_RAMP_UP_INTERVAL * HZ) && |
| ((jiffies - pnode->last_q_full_time) > |
| LPFC_Q_RAMP_UP_INTERVAL * HZ) && |
| (vport->cfg_lun_queue_depth > queue_depth)) { |
| shost_for_each_device(tmp_sdev, shost) { |
| if (vport->cfg_lun_queue_depth > tmp_sdev->queue_depth){ |
| if (tmp_sdev->id != scsi_id) |
| continue; |
| if (tmp_sdev->ordered_tags) |
| scsi_adjust_queue_depth(tmp_sdev, |
| MSG_ORDERED_TAG, |
| tmp_sdev->queue_depth+1); |
| else |
| scsi_adjust_queue_depth(tmp_sdev, |
| MSG_SIMPLE_TAG, |
| tmp_sdev->queue_depth+1); |
| |
| pnode->last_ramp_up_time = jiffies; |
| } |
| } |
| lpfc_send_sdev_queuedepth_change_event(phba, vport, pnode, |
| 0xFFFFFFFF, |
| queue_depth , queue_depth + 1); |
| } |
| |
| /* |
| * Check for queue full. If the lun is reporting queue full, then |
| * back off the lun queue depth to prevent target overloads. |
| */ |
| if (result == SAM_STAT_TASK_SET_FULL && pnode && |
| NLP_CHK_NODE_ACT(pnode)) { |
| pnode->last_q_full_time = jiffies; |
| |
| shost_for_each_device(tmp_sdev, shost) { |
| if (tmp_sdev->id != scsi_id) |
| continue; |
| depth = scsi_track_queue_full(tmp_sdev, |
| tmp_sdev->queue_depth - 1); |
| } |
| /* |
| * The queue depth cannot be lowered any more. |
| * Modify the returned error code to store |
| * the final depth value set by |
| * scsi_track_queue_full. |
| */ |
| if (depth == -1) |
| depth = shost->cmd_per_lun; |
| |
| if (depth) { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "0711 detected queue full - lun queue " |
| "depth adjusted to %d.\n", depth); |
| lpfc_send_sdev_queuedepth_change_event(phba, vport, |
| pnode, 0xFFFFFFFF, |
| depth+1, depth); |
| } |
| } |
| |
| /* |
| * If there is a thread waiting for command completion |
| * wake up the thread. |
| */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| lpfc_cmd->pCmd = NULL; |
| if (lpfc_cmd->waitq) |
| wake_up(lpfc_cmd->waitq); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| } |
| |
| /** |
| * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB |
| * @data: A pointer to the immediate command data portion of the IOCB. |
| * @fcp_cmnd: The FCP Command that is provided by the SCSI layer. |
| * |
| * The routine copies the entire FCP command from @fcp_cmnd to @data while |
| * byte swapping the data to big endian format for transmission on the wire. |
| **/ |
| static void |
| lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) |
| { |
| int i, j; |
| for (i = 0, j = 0; i < sizeof(struct fcp_cmnd); |
| i += sizeof(uint32_t), j++) { |
| ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]); |
| } |
| } |
| |
| /** |
| * lpfc_scsi_prep_cmnd - Routine to convert scsi cmnd to FCP information unit |
| * @vport: The virtual port for which this call is being executed. |
| * @lpfc_cmd: The scsi command which needs to send. |
| * @pnode: Pointer to lpfc_nodelist. |
| * |
| * This routine initializes fcp_cmnd and iocb data structure from scsi command |
| * to transfer. |
| **/ |
| static void |
| lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, |
| struct lpfc_nodelist *pnode) |
| { |
| struct lpfc_hba *phba = vport->phba; |
| struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; |
| struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; |
| IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; |
| struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); |
| int datadir = scsi_cmnd->sc_data_direction; |
| char tag[2]; |
| |
| if (!pnode || !NLP_CHK_NODE_ACT(pnode)) |
| return; |
| |
| lpfc_cmd->fcp_rsp->rspSnsLen = 0; |
| /* clear task management bits */ |
| lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; |
| |
| int_to_scsilun(lpfc_cmd->pCmd->device->lun, |
| &lpfc_cmd->fcp_cmnd->fcp_lun); |
| |
| memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16); |
| |
| if (scsi_populate_tag_msg(scsi_cmnd, tag)) { |
| switch (tag[0]) { |
| case HEAD_OF_QUEUE_TAG: |
| fcp_cmnd->fcpCntl1 = HEAD_OF_Q; |
| break; |
| case ORDERED_QUEUE_TAG: |
| fcp_cmnd->fcpCntl1 = ORDERED_Q; |
| break; |
| default: |
| fcp_cmnd->fcpCntl1 = SIMPLE_Q; |
| break; |
| } |
| } else |
| fcp_cmnd->fcpCntl1 = 0; |
| |
| /* |
| * There are three possibilities here - use scatter-gather segment, use |
| * the single mapping, or neither. Start the lpfc command prep by |
| * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first |
| * data bde entry. |
| */ |
| if (scsi_sg_count(scsi_cmnd)) { |
| if (datadir == DMA_TO_DEVICE) { |
| iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; |
| iocb_cmd->un.fcpi.fcpi_parm = 0; |
| iocb_cmd->ulpPU = 0; |
| fcp_cmnd->fcpCntl3 = WRITE_DATA; |
| phba->fc4OutputRequests++; |
| } else { |
| iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; |
| iocb_cmd->ulpPU = PARM_READ_CHECK; |
| fcp_cmnd->fcpCntl3 = READ_DATA; |
| phba->fc4InputRequests++; |
| } |
| } else { |
| iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; |
| iocb_cmd->un.fcpi.fcpi_parm = 0; |
| iocb_cmd->ulpPU = 0; |
| fcp_cmnd->fcpCntl3 = 0; |
| phba->fc4ControlRequests++; |
| } |
| if (phba->sli_rev == 3 && |
| !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) |
| lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); |
| /* |
| * Finish initializing those IOCB fields that are independent |
| * of the scsi_cmnd request_buffer |
| */ |
| piocbq->iocb.ulpContext = pnode->nlp_rpi; |
| if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) |
| piocbq->iocb.ulpFCP2Rcvy = 1; |
| else |
| piocbq->iocb.ulpFCP2Rcvy = 0; |
| |
| piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); |
| piocbq->context1 = lpfc_cmd; |
| piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; |
| piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; |
| piocbq->vport = vport; |
| } |
| |
| /** |
| * lpfc_scsi_prep_task_mgmt_cmnd - Convert scsi TM cmnd to FCP information unit |
| * @vport: The virtual port for which this call is being executed. |
| * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. |
| * @lun: Logical unit number. |
| * @task_mgmt_cmd: SCSI task management command. |
| * |
| * This routine creates FCP information unit corresponding to @task_mgmt_cmd. |
| * |
| * Return codes: |
| * 0 - Error |
| * 1 - Success |
| **/ |
| static int |
| lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, |
| struct lpfc_scsi_buf *lpfc_cmd, |
| unsigned int lun, |
| uint8_t task_mgmt_cmd) |
| { |
| struct lpfc_iocbq *piocbq; |
| IOCB_t *piocb; |
| struct fcp_cmnd *fcp_cmnd; |
| struct lpfc_rport_data *rdata = lpfc_cmd->rdata; |
| struct lpfc_nodelist *ndlp = rdata->pnode; |
| |
| if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || |
| ndlp->nlp_state != NLP_STE_MAPPED_NODE) |
| return 0; |
| |
| piocbq = &(lpfc_cmd->cur_iocbq); |
| piocbq->vport = vport; |
| |
| piocb = &piocbq->iocb; |
| |
| fcp_cmnd = lpfc_cmd->fcp_cmnd; |
| /* Clear out any old data in the FCP command area */ |
| memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); |
| int_to_scsilun(lun, &fcp_cmnd->fcp_lun); |
| fcp_cmnd->fcpCntl2 = task_mgmt_cmd; |
| if (vport->phba->sli_rev == 3 && |
| !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) |
| lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); |
| piocb->ulpCommand = CMD_FCP_ICMND64_CR; |
| piocb->ulpContext = ndlp->nlp_rpi; |
| if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { |
| piocb->ulpFCP2Rcvy = 1; |
| } |
| piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); |
| |
| /* ulpTimeout is only one byte */ |
| if (lpfc_cmd->timeout > 0xff) { |
| /* |
| * Do not timeout the command at the firmware level. |
| * The driver will provide the timeout mechanism. |
| */ |
| piocb->ulpTimeout = 0; |
| } else { |
| piocb->ulpTimeout = lpfc_cmd->timeout; |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command |
| * @phba: The Hba for which this call is being executed. |
| * @cmdiocbq: Pointer to lpfc_iocbq data structure. |
| * @rspiocbq: Pointer to lpfc_iocbq data structure. |
| * |
| * This routine is IOCB completion routine for device reset and target reset |
| * routine. This routine release scsi buffer associated with lpfc_cmd. |
| **/ |
| static void |
| lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, |
| struct lpfc_iocbq *cmdiocbq, |
| struct lpfc_iocbq *rspiocbq) |
| { |
| struct lpfc_scsi_buf *lpfc_cmd = |
| (struct lpfc_scsi_buf *) cmdiocbq->context1; |
| if (lpfc_cmd) |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| return; |
| } |
| |
| /** |
| * lpfc_scsi_tgt_reset - Target reset handler |
| * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure |
| * @vport: The virtual port for which this call is being executed. |
| * @tgt_id: Target ID. |
| * @lun: Lun number. |
| * @rdata: Pointer to lpfc_rport_data. |
| * |
| * This routine issues a TARGET RESET iocb to reset a target with @tgt_id ID. |
| * |
| * Return Code: |
| * 0x2003 - Error |
| * 0x2002 - Success. |
| **/ |
| static int |
| lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport, |
| unsigned tgt_id, unsigned int lun, |
| struct lpfc_rport_data *rdata) |
| { |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_iocbq *iocbq; |
| struct lpfc_iocbq *iocbqrsp; |
| int ret; |
| int status; |
| |
| if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode)) |
| return FAILED; |
| |
| lpfc_cmd->rdata = rdata; |
| status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun, |
| FCP_TARGET_RESET); |
| if (!status) |
| return FAILED; |
| |
| iocbq = &lpfc_cmd->cur_iocbq; |
| iocbqrsp = lpfc_sli_get_iocbq(phba); |
| |
| if (!iocbqrsp) |
| return FAILED; |
| |
| /* Issue Target Reset to TGT <num> */ |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0702 Issue Target Reset to TGT %d Data: x%x x%x\n", |
| tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag); |
| status = lpfc_sli_issue_iocb_wait(phba, |
| &phba->sli.ring[phba->sli.fcp_ring], |
| iocbq, iocbqrsp, lpfc_cmd->timeout); |
| if (status != IOCB_SUCCESS) { |
| if (status == IOCB_TIMEDOUT) { |
| iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; |
| ret = TIMEOUT_ERROR; |
| } else |
| ret = FAILED; |
| lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
| } else { |
| ret = SUCCESS; |
| lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4]; |
| lpfc_cmd->status = iocbqrsp->iocb.ulpStatus; |
| if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && |
| (lpfc_cmd->result & IOERR_DRVR_MASK)) |
| lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
| } |
| |
| lpfc_sli_release_iocbq(phba, iocbqrsp); |
| return ret; |
| } |
| |
| /** |
| * lpfc_info - Info entry point of scsi_host_template data structure |
| * @host: The scsi host for which this call is being executed. |
| * |
| * This routine provides module information about hba. |
| * |
| * Reutrn code: |
| * Pointer to char - Success. |
| **/ |
| const char * |
| lpfc_info(struct Scsi_Host *host) |
| { |
| struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| int len; |
| static char lpfcinfobuf[384]; |
| |
| memset(lpfcinfobuf,0,384); |
| if (phba && phba->pcidev){ |
| strncpy(lpfcinfobuf, phba->ModelDesc, 256); |
| len = strlen(lpfcinfobuf); |
| snprintf(lpfcinfobuf + len, |
| 384-len, |
| " on PCI bus %02x device %02x irq %d", |
| phba->pcidev->bus->number, |
| phba->pcidev->devfn, |
| phba->pcidev->irq); |
| len = strlen(lpfcinfobuf); |
| if (phba->Port[0]) { |
| snprintf(lpfcinfobuf + len, |
| 384-len, |
| " port %s", |
| phba->Port); |
| } |
| } |
| return lpfcinfobuf; |
| } |
| |
| /** |
| * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba |
| * @phba: The Hba for which this call is being executed. |
| * |
| * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. |
| * The default value of cfg_poll_tmo is 10 milliseconds. |
| **/ |
| static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) |
| { |
| unsigned long poll_tmo_expires = |
| (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); |
| |
| if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) |
| mod_timer(&phba->fcp_poll_timer, |
| poll_tmo_expires); |
| } |
| |
| /** |
| * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA |
| * @phba: The Hba for which this call is being executed. |
| * |
| * This routine starts the fcp_poll_timer of @phba. |
| **/ |
| void lpfc_poll_start_timer(struct lpfc_hba * phba) |
| { |
| lpfc_poll_rearm_timer(phba); |
| } |
| |
| /** |
| * lpfc_poll_timeout - Restart polling timer |
| * @ptr: Map to lpfc_hba data structure pointer. |
| * |
| * This routine restarts fcp_poll timer, when FCP ring polling is enable |
| * and FCP Ring interrupt is disable. |
| **/ |
| |
| void lpfc_poll_timeout(unsigned long ptr) |
| { |
| struct lpfc_hba *phba = (struct lpfc_hba *) ptr; |
| |
| if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { |
| lpfc_sli_poll_fcp_ring (phba); |
| if (phba->cfg_poll & DISABLE_FCP_RING_INT) |
| lpfc_poll_rearm_timer(phba); |
| } |
| } |
| |
| /** |
| * lpfc_queuecommand - scsi_host_template queuecommand entry point |
| * @cmnd: Pointer to scsi_cmnd data structure. |
| * @done: Pointer to done routine. |
| * |
| * Driver registers this routine to scsi midlayer to submit a @cmd to process. |
| * This routine prepares an IOCB from scsi command and provides to firmware. |
| * The @done callback is invoked after driver finished processing the command. |
| * |
| * Return value : |
| * 0 - Success |
| * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. |
| **/ |
| static int |
| lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) |
| { |
| struct Scsi_Host *shost = cmnd->device->host; |
| struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_sli *psli = &phba->sli; |
| struct lpfc_rport_data *rdata = cmnd->device->hostdata; |
| struct lpfc_nodelist *ndlp = rdata->pnode; |
| struct lpfc_scsi_buf *lpfc_cmd; |
| struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| int err; |
| |
| err = fc_remote_port_chkready(rport); |
| if (err) { |
| cmnd->result = err; |
| goto out_fail_command; |
| } |
| |
| if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && |
| scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { |
| |
| printk(KERN_ERR "BLKGRD ERROR: rcvd protected cmd:%02x op:%02x " |
| "str=%s without registering for BlockGuard - " |
| "Rejecting command\n", |
| cmnd->cmnd[0], scsi_get_prot_op(cmnd), |
| dif_op_str[scsi_get_prot_op(cmnd)]); |
| goto out_fail_command; |
| } |
| |
| /* |
| * Catch race where our node has transitioned, but the |
| * transport is still transitioning. |
| */ |
| if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) { |
| cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); |
| goto out_fail_command; |
| } |
| if (vport->cfg_max_scsicmpl_time && |
| (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)) |
| goto out_host_busy; |
| |
| lpfc_cmd = lpfc_get_scsi_buf(phba); |
| if (lpfc_cmd == NULL) { |
| lpfc_rampdown_queue_depth(phba); |
| |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0707 driver's buffer pool is empty, " |
| "IO busied\n"); |
| goto out_host_busy; |
| } |
| |
| /* |
| * Store the midlayer's command structure for the completion phase |
| * and complete the command initialization. |
| */ |
| lpfc_cmd->pCmd = cmnd; |
| lpfc_cmd->rdata = rdata; |
| lpfc_cmd->timeout = 0; |
| lpfc_cmd->start_time = jiffies; |
| cmnd->host_scribble = (unsigned char *)lpfc_cmd; |
| cmnd->scsi_done = done; |
| |
| if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9033 BLKGRD: rcvd protected cmd:%02x op:%02x " |
| "str=%s\n", |
| cmnd->cmnd[0], scsi_get_prot_op(cmnd), |
| dif_op_str[scsi_get_prot_op(cmnd)]); |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x " |
| "%02x %02x %02x %02x %02x \n", |
| cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2], |
| cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5], |
| cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8], |
| cmnd->cmnd[9]); |
| if (cmnd->cmnd[0] == READ_10) |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9035 BLKGRD: READ @ sector %llu, " |
| "count %lu\n", |
| (unsigned long long)scsi_get_lba(cmnd), |
| cmnd->request->nr_sectors); |
| else if (cmnd->cmnd[0] == WRITE_10) |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9036 BLKGRD: WRITE @ sector %llu, " |
| "count %lu cmd=%p\n", |
| (unsigned long long)scsi_get_lba(cmnd), |
| cmnd->request->nr_sectors, |
| cmnd); |
| |
| err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); |
| } else { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9038 BLKGRD: rcvd unprotected cmd:%02x op:%02x" |
| " str=%s\n", |
| cmnd->cmnd[0], scsi_get_prot_op(cmnd), |
| dif_op_str[scsi_get_prot_op(cmnd)]); |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9039 BLKGRD: CDB: %02x %02x %02x %02x %02x " |
| "%02x %02x %02x %02x %02x \n", |
| cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2], |
| cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5], |
| cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8], |
| cmnd->cmnd[9]); |
| if (cmnd->cmnd[0] == READ_10) |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9040 dbg: READ @ sector %llu, " |
| "count %lu\n", |
| (unsigned long long)scsi_get_lba(cmnd), |
| cmnd->request->nr_sectors); |
| else if (cmnd->cmnd[0] == WRITE_10) |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9041 dbg: WRITE @ sector %llu, " |
| "count %lu cmd=%p\n", |
| (unsigned long long)scsi_get_lba(cmnd), |
| cmnd->request->nr_sectors, cmnd); |
| else |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, |
| "9042 dbg: parser not implemented\n"); |
| err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); |
| } |
| |
| if (err) |
| goto out_host_busy_free_buf; |
| |
| lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); |
| |
| atomic_inc(&ndlp->cmd_pending); |
| err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring], |
| &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); |
| if (err) { |
| atomic_dec(&ndlp->cmd_pending); |
| goto out_host_busy_free_buf; |
| } |
| if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { |
| lpfc_sli_poll_fcp_ring(phba); |
| if (phba->cfg_poll & DISABLE_FCP_RING_INT) |
| lpfc_poll_rearm_timer(phba); |
| } |
| |
| return 0; |
| |
| out_host_busy_free_buf: |
| lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| out_host_busy: |
| return SCSI_MLQUEUE_HOST_BUSY; |
| |
| out_fail_command: |
| done(cmnd); |
| return 0; |
| } |
| |
| /** |
| * lpfc_block_error_handler - Routine to block error handler |
| * @cmnd: Pointer to scsi_cmnd data structure. |
| * |
| * This routine blocks execution till fc_rport state is not FC_PORSTAT_BLCOEKD. |
| **/ |
| static void |
| lpfc_block_error_handler(struct scsi_cmnd *cmnd) |
| { |
| struct Scsi_Host *shost = cmnd->device->host; |
| struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| |
| spin_lock_irq(shost->host_lock); |
| while (rport->port_state == FC_PORTSTATE_BLOCKED) { |
| spin_unlock_irq(shost->host_lock); |
| msleep(1000); |
| spin_lock_irq(shost->host_lock); |
| } |
| spin_unlock_irq(shost->host_lock); |
| return; |
| } |
| |
| /** |
| * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point |
| * @cmnd: Pointer to scsi_cmnd data structure. |
| * |
| * This routine aborts @cmnd pending in base driver. |
| * |
| * Return code : |
| * 0x2003 - Error |
| * 0x2002 - Success |
| **/ |
| static int |
| lpfc_abort_handler(struct scsi_cmnd *cmnd) |
| { |
| struct Scsi_Host *shost = cmnd->device->host; |
| struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring]; |
| struct lpfc_iocbq *iocb; |
| struct lpfc_iocbq *abtsiocb; |
| struct lpfc_scsi_buf *lpfc_cmd; |
| IOCB_t *cmd, *icmd; |
| int ret = SUCCESS; |
| DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); |
| |
| lpfc_block_error_handler(cmnd); |
| lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; |
| BUG_ON(!lpfc_cmd); |
| |
| /* |
| * If pCmd field of the corresponding lpfc_scsi_buf structure |
| * points to a different SCSI command, then the driver has |
| * already completed this command, but the midlayer did not |
| * see the completion before the eh fired. Just return |
| * SUCCESS. |
| */ |
| iocb = &lpfc_cmd->cur_iocbq; |
| if (lpfc_cmd->pCmd != cmnd) |
| goto out; |
| |
| BUG_ON(iocb->context1 != lpfc_cmd); |
| |
| abtsiocb = lpfc_sli_get_iocbq(phba); |
| if (abtsiocb == NULL) { |
| ret = FAILED; |
| goto out; |
| } |
| |
| /* |
| * The scsi command can not be in txq and it is in flight because the |
| * pCmd is still pointig at the SCSI command we have to abort. There |
| * is no need to search the txcmplq. Just send an abort to the FW. |
| */ |
| |
| cmd = &iocb->iocb; |
| icmd = &abtsiocb->iocb; |
| icmd->un.acxri.abortType = ABORT_TYPE_ABTS; |
| icmd->un.acxri.abortContextTag = cmd->ulpContext; |
| icmd->un.acxri.abortIoTag = cmd->ulpIoTag; |
| |
| icmd->ulpLe = 1; |
| icmd->ulpClass = cmd->ulpClass; |
| if (lpfc_is_link_up(phba)) |
| icmd->ulpCommand = CMD_ABORT_XRI_CN; |
| else |
| icmd->ulpCommand = CMD_CLOSE_XRI_CN; |
| |
| abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; |
| abtsiocb->vport = vport; |
| if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) { |
| lpfc_sli_release_iocbq(phba, abtsiocb); |
| ret = FAILED; |
| goto out; |
| } |
| |
| if (phba->cfg_poll & DISABLE_FCP_RING_INT) |
| lpfc_sli_poll_fcp_ring (phba); |
| |
| lpfc_cmd->waitq = &waitq; |
| /* Wait for abort to complete */ |
| wait_event_timeout(waitq, |
| (lpfc_cmd->pCmd != cmnd), |
| (2*vport->cfg_devloss_tmo*HZ)); |
| |
| spin_lock_irq(shost->host_lock); |
| lpfc_cmd->waitq = NULL; |
| spin_unlock_irq(shost->host_lock); |
| |
| if (lpfc_cmd->pCmd == cmnd) { |
| ret = FAILED; |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0748 abort handler timed out waiting " |
| "for abort to complete: ret %#x, ID %d, " |
| "LUN %d, snum %#lx\n", |
| ret, cmnd->device->id, cmnd->device->lun, |
| cmnd->serial_number); |
| } |
| |
| out: |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "0749 SCSI Layer I/O Abort Request Status x%x ID %d " |
| "LUN %d snum %#lx\n", ret, cmnd->device->id, |
| cmnd->device->lun, cmnd->serial_number); |
| return ret; |
| } |
| |
| /** |
| * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point |
| * @cmnd: Pointer to scsi_cmnd data structure. |
| * |
| * This routine does a device reset by sending a TARGET_RESET task management |
| * command. |
| * |
| * Return code : |
| * 0x2003 - Error |
| * 0x2002 - Success |
| **/ |
| static int |
| lpfc_device_reset_handler(struct scsi_cmnd *cmnd) |
| { |
| struct Scsi_Host *shost = cmnd->device->host; |
| struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_scsi_buf *lpfc_cmd; |
| struct lpfc_iocbq *iocbq, *iocbqrsp; |
| struct lpfc_rport_data *rdata = cmnd->device->hostdata; |
| struct lpfc_nodelist *pnode = rdata->pnode; |
| unsigned long later; |
| int ret = SUCCESS; |
| int status; |
| int cnt; |
| struct lpfc_scsi_event_header scsi_event; |
| |
| lpfc_block_error_handler(cmnd); |
| /* |
| * If target is not in a MAPPED state, delay the reset until |
| * target is rediscovered or devloss timeout expires. |
| */ |
| later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; |
| while (time_after(later, jiffies)) { |
| if (!pnode || !NLP_CHK_NODE_ACT(pnode)) |
| return FAILED; |
| if (pnode->nlp_state == NLP_STE_MAPPED_NODE) |
| break; |
| schedule_timeout_uninterruptible(msecs_to_jiffies(500)); |
| rdata = cmnd->device->hostdata; |
| if (!rdata) |
| break; |
| pnode = rdata->pnode; |
| } |
| |
| scsi_event.event_type = FC_REG_SCSI_EVENT; |
| scsi_event.subcategory = LPFC_EVENT_TGTRESET; |
| scsi_event.lun = 0; |
| memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name)); |
| memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name)); |
| |
| fc_host_post_vendor_event(shost, |
| fc_get_event_number(), |
| sizeof(scsi_event), |
| (char *)&scsi_event, |
| LPFC_NL_VENDOR_ID); |
| |
| if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0721 LUN Reset rport " |
| "failure: msec x%x rdata x%p\n", |
| jiffies_to_msecs(jiffies - later), rdata); |
| return FAILED; |
| } |
| lpfc_cmd = lpfc_get_scsi_buf(phba); |
| if (lpfc_cmd == NULL) |
| return FAILED; |
| lpfc_cmd->timeout = 60; |
| lpfc_cmd->rdata = rdata; |
| |
| status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, |
| cmnd->device->lun, |
| FCP_TARGET_RESET); |
| if (!status) { |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| return FAILED; |
| } |
| iocbq = &lpfc_cmd->cur_iocbq; |
| |
| /* get a buffer for this IOCB command response */ |
| iocbqrsp = lpfc_sli_get_iocbq(phba); |
| if (iocbqrsp == NULL) { |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| return FAILED; |
| } |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0703 Issue target reset to TGT %d LUN %d " |
| "rpi x%x nlp_flag x%x\n", cmnd->device->id, |
| cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag); |
| status = lpfc_sli_issue_iocb_wait(phba, |
| &phba->sli.ring[phba->sli.fcp_ring], |
| iocbq, iocbqrsp, lpfc_cmd->timeout); |
| if (status == IOCB_TIMEDOUT) { |
| iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; |
| ret = TIMEOUT_ERROR; |
| } else { |
| if (status != IOCB_SUCCESS) |
| ret = FAILED; |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| } |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0713 SCSI layer issued device reset (%d, %d) " |
| "return x%x status x%x result x%x\n", |
| cmnd->device->id, cmnd->device->lun, ret, |
| iocbqrsp->iocb.ulpStatus, |
| iocbqrsp->iocb.un.ulpWord[4]); |
| lpfc_sli_release_iocbq(phba, iocbqrsp); |
| cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun, |
| LPFC_CTX_TGT); |
| if (cnt) |
| lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], |
| cmnd->device->id, cmnd->device->lun, |
| LPFC_CTX_TGT); |
| later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; |
| while (time_after(later, jiffies) && cnt) { |
| schedule_timeout_uninterruptible(msecs_to_jiffies(20)); |
| cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, |
| cmnd->device->lun, LPFC_CTX_TGT); |
| } |
| if (cnt) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0719 device reset I/O flush failure: " |
| "cnt x%x\n", cnt); |
| ret = FAILED; |
| } |
| return ret; |
| } |
| |
| /** |
| * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point |
| * @cmnd: Pointer to scsi_cmnd data structure. |
| * |
| * This routine does target reset to all target on @cmnd->device->host. |
| * |
| * Return Code: |
| * 0x2003 - Error |
| * 0x2002 - Success |
| **/ |
| static int |
| lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) |
| { |
| struct Scsi_Host *shost = cmnd->device->host; |
| struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_nodelist *ndlp = NULL; |
| int match; |
| int ret = SUCCESS, status = SUCCESS, i; |
| int cnt; |
| struct lpfc_scsi_buf * lpfc_cmd; |
| unsigned long later; |
| struct lpfc_scsi_event_header scsi_event; |
| |
| scsi_event.event_type = FC_REG_SCSI_EVENT; |
| scsi_event.subcategory = LPFC_EVENT_BUSRESET; |
| scsi_event.lun = 0; |
| memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name)); |
| memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name)); |
| |
| fc_host_post_vendor_event(shost, |
| fc_get_event_number(), |
| sizeof(scsi_event), |
| (char *)&scsi_event, |
| LPFC_NL_VENDOR_ID); |
| |
| lpfc_block_error_handler(cmnd); |
| /* |
| * Since the driver manages a single bus device, reset all |
| * targets known to the driver. Should any target reset |
| * fail, this routine returns failure to the midlayer. |
| */ |
| for (i = 0; i < LPFC_MAX_TARGET; i++) { |
| /* Search for mapped node by target ID */ |
| match = 0; |
| spin_lock_irq(shost->host_lock); |
| list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { |
| if (!NLP_CHK_NODE_ACT(ndlp)) |
| continue; |
| if (ndlp->nlp_state == NLP_STE_MAPPED_NODE && |
| ndlp->nlp_sid == i && |
| ndlp->rport) { |
| match = 1; |
| break; |
| } |
| } |
| spin_unlock_irq(shost->host_lock); |
| if (!match) |
| continue; |
| lpfc_cmd = lpfc_get_scsi_buf(phba); |
| if (lpfc_cmd) { |
| lpfc_cmd->timeout = 60; |
| status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i, |
| cmnd->device->lun, |
| ndlp->rport->dd_data); |
| if (status != TIMEOUT_ERROR) |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| } |
| if (!lpfc_cmd || status != SUCCESS) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0700 Bus Reset on target %d failed\n", |
| i); |
| ret = FAILED; |
| } |
| } |
| /* |
| * All outstanding txcmplq I/Os should have been aborted by |
| * the targets. Unfortunately, some targets do not abide by |
| * this forcing the driver to double check. |
| */ |
| cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST); |
| if (cnt) |
| lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], |
| 0, 0, LPFC_CTX_HOST); |
| later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; |
| while (time_after(later, jiffies) && cnt) { |
| schedule_timeout_uninterruptible(msecs_to_jiffies(20)); |
| cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST); |
| } |
| if (cnt) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0715 Bus Reset I/O flush failure: " |
| "cnt x%x left x%x\n", cnt, i); |
| ret = FAILED; |
| } |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); |
| return ret; |
| } |
| |
| /** |
| * lpfc_slave_alloc - scsi_host_template slave_alloc entry point |
| * @sdev: Pointer to scsi_device. |
| * |
| * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's |
| * globally available list of scsi buffers. This routine also makes sure scsi |
| * buffer is not allocated more than HBA limit conveyed to midlayer. This list |
| * of scsi buffer exists for the lifetime of the driver. |
| * |
| * Return codes: |
| * non-0 - Error |
| * 0 - Success |
| **/ |
| static int |
| lpfc_slave_alloc(struct scsi_device *sdev) |
| { |
| struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_scsi_buf *scsi_buf = NULL; |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| uint32_t total = 0, i; |
| uint32_t num_to_alloc = 0; |
| unsigned long flags; |
| |
| if (!rport || fc_remote_port_chkready(rport)) |
| return -ENXIO; |
| |
| sdev->hostdata = rport->dd_data; |
| |
| /* |
| * Populate the cmds_per_lun count scsi_bufs into this host's globally |
| * available list of scsi buffers. Don't allocate more than the |
| * HBA limit conveyed to the midlayer via the host structure. The |
| * formula accounts for the lun_queue_depth + error handlers + 1 |
| * extra. This list of scsi bufs exists for the lifetime of the driver. |
| */ |
| total = phba->total_scsi_bufs; |
| num_to_alloc = vport->cfg_lun_queue_depth + 2; |
| |
| /* Allow some exchanges to be available always to complete discovery */ |
| if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "0704 At limitation of %d preallocated " |
| "command buffers\n", total); |
| return 0; |
| /* Allow some exchanges to be available always to complete discovery */ |
| } else if (total + num_to_alloc > |
| phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "0705 Allocation request of %d " |
| "command buffers will exceed max of %d. " |
| "Reducing allocation request to %d.\n", |
| num_to_alloc, phba->cfg_hba_queue_depth, |
| (phba->cfg_hba_queue_depth - total)); |
| num_to_alloc = phba->cfg_hba_queue_depth - total; |
| } |
| |
| for (i = 0; i < num_to_alloc; i++) { |
| scsi_buf = lpfc_new_scsi_buf(vport); |
| if (!scsi_buf) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0706 Failed to allocate " |
| "command buffer\n"); |
| break; |
| } |
| |
| spin_lock_irqsave(&phba->scsi_buf_list_lock, flags); |
| phba->total_scsi_bufs++; |
| list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list); |
| spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags); |
| } |
| return 0; |
| } |
| |
| /** |
| * lpfc_slave_configure - scsi_host_template slave_configure entry point |
| * @sdev: Pointer to scsi_device. |
| * |
| * This routine configures following items |
| * - Tag command queuing support for @sdev if supported. |
| * - Dev loss time out value of fc_rport. |
| * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. |
| * |
| * Return codes: |
| * 0 - Success |
| **/ |
| static int |
| lpfc_slave_configure(struct scsi_device *sdev) |
| { |
| struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| struct fc_rport *rport = starget_to_rport(sdev->sdev_target); |
| |
| if (sdev->tagged_supported) |
| scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth); |
| else |
| scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth); |
| |
| /* |
| * Initialize the fc transport attributes for the target |
| * containing this scsi device. Also note that the driver's |
| * target pointer is stored in the starget_data for the |
| * driver's sysfs entry point functions. |
| */ |
| rport->dev_loss_tmo = vport->cfg_devloss_tmo; |
| |
| if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { |
| lpfc_sli_poll_fcp_ring(phba); |
| if (phba->cfg_poll & DISABLE_FCP_RING_INT) |
| lpfc_poll_rearm_timer(phba); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * lpfc_slave_destroy - slave_destroy entry point of SHT data structure |
| * @sdev: Pointer to scsi_device. |
| * |
| * This routine sets @sdev hostatdata filed to null. |
| **/ |
| static void |
| lpfc_slave_destroy(struct scsi_device *sdev) |
| { |
| sdev->hostdata = NULL; |
| return; |
| } |
| |
| |
| struct scsi_host_template lpfc_template = { |
| .module = THIS_MODULE, |
| .name = LPFC_DRIVER_NAME, |
| .info = lpfc_info, |
| .queuecommand = lpfc_queuecommand, |
| .eh_abort_handler = lpfc_abort_handler, |
| .eh_device_reset_handler= lpfc_device_reset_handler, |
| .eh_bus_reset_handler = lpfc_bus_reset_handler, |
| .slave_alloc = lpfc_slave_alloc, |
| .slave_configure = lpfc_slave_configure, |
| .slave_destroy = lpfc_slave_destroy, |
| .scan_finished = lpfc_scan_finished, |
| .this_id = -1, |
| .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, |
| .cmd_per_lun = LPFC_CMD_PER_LUN, |
| .use_clustering = ENABLE_CLUSTERING, |
| .shost_attrs = lpfc_hba_attrs, |
| .max_sectors = 0xFFFF, |
| }; |
| |
| struct scsi_host_template lpfc_vport_template = { |
| .module = THIS_MODULE, |
| .name = LPFC_DRIVER_NAME, |
| .info = lpfc_info, |
| .queuecommand = lpfc_queuecommand, |
| .eh_abort_handler = lpfc_abort_handler, |
| .eh_device_reset_handler= lpfc_device_reset_handler, |
| .eh_bus_reset_handler = lpfc_bus_reset_handler, |
| .slave_alloc = lpfc_slave_alloc, |
| .slave_configure = lpfc_slave_configure, |
| .slave_destroy = lpfc_slave_destroy, |
| .scan_finished = lpfc_scan_finished, |
| .this_id = -1, |
| .sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT, |
| .cmd_per_lun = LPFC_CMD_PER_LUN, |
| .use_clustering = ENABLE_CLUSTERING, |
| .shost_attrs = lpfc_vport_attrs, |
| .max_sectors = 0xFFFF, |
| }; |