| /******************************************************************* |
| * This file is part of the Emulex Linux Device Driver for * |
| * Fibre Channel Host Bus Adapters. * |
| * Copyright (C) 2004-2014 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/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/export.h> |
| #include <linux/delay.h> |
| #include <asm/unaligned.h> |
| #include <linux/crc-t10dif.h> |
| #include <net/checksum.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_hw4.h" |
| #include "lpfc_hw.h" |
| #include "lpfc_sli.h" |
| #include "lpfc_sli4.h" |
| #include "lpfc_nl.h" |
| #include "lpfc_disc.h" |
| #include "lpfc.h" |
| #include "lpfc_scsi.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 = 1; |
| |
| static char *dif_op_str[] = { |
| "PROT_NORMAL", |
| "PROT_READ_INSERT", |
| "PROT_WRITE_STRIP", |
| "PROT_READ_STRIP", |
| "PROT_WRITE_INSERT", |
| "PROT_READ_PASS", |
| "PROT_WRITE_PASS", |
| }; |
| |
| struct scsi_dif_tuple { |
| __be16 guard_tag; /* Checksum */ |
| __be16 app_tag; /* Opaque storage */ |
| __be32 ref_tag; /* Target LBA or indirect LBA */ |
| }; |
| |
| static struct lpfc_rport_data * |
| lpfc_rport_data_from_scsi_device(struct scsi_device *sdev) |
| { |
| struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata; |
| |
| if (vport->phba->cfg_fof) |
| return ((struct lpfc_device_data *)sdev->hostdata)->rport_data; |
| else |
| return (struct lpfc_rport_data *)sdev->hostdata; |
| } |
| |
| static void |
| lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); |
| static void |
| lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb); |
| static int |
| lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc); |
| |
| static void |
| lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd) |
| { |
| void *src, *dst; |
| struct scatterlist *sgde = scsi_sglist(cmnd); |
| |
| if (!_dump_buf_data) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n", |
| __func__); |
| return; |
| } |
| |
| |
| if (!sgde) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9051 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 lpfc_hba *phba, struct scsi_cmnd *cmnd) |
| { |
| void *src, *dst; |
| struct scatterlist *sgde = scsi_prot_sglist(cmnd); |
| |
| if (!_dump_buf_dif) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n", |
| __func__); |
| return; |
| } |
| |
| if (!sgde) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9053 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); |
| } |
| } |
| |
| static inline unsigned |
| lpfc_cmd_blksize(struct scsi_cmnd *sc) |
| { |
| return sc->device->sector_size; |
| } |
| |
| #define LPFC_CHECK_PROTECT_GUARD 1 |
| #define LPFC_CHECK_PROTECT_REF 2 |
| static inline unsigned |
| lpfc_cmd_protect(struct scsi_cmnd *sc, int flag) |
| { |
| return 1; |
| } |
| |
| static inline unsigned |
| lpfc_cmd_guard_csum(struct scsi_cmnd *sc) |
| { |
| if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF) |
| return 0; |
| if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge. |
| * @phba: Pointer to HBA object. |
| * @lpfc_cmd: lpfc scsi command object pointer. |
| * |
| * This function is called from the lpfc_prep_task_mgmt_cmd function to |
| * set the last bit in the response sge entry. |
| **/ |
| static void |
| lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba, |
| struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; |
| if (sgl) { |
| sgl += 1; |
| sgl->word2 = le32_to_cpu(sgl->word2); |
| bf_set(lpfc_sli4_sge_last, sgl, 1); |
| sgl->word2 = cpu_to_le32(sgl->word2); |
| } |
| } |
| |
| /** |
| * 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 || |
| !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, |
| uint64_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_change_queue_depth - Alter scsi device queue depth |
| * @sdev: Pointer the scsi device on which to change the queue depth. |
| * @qdepth: New queue depth to set the sdev to. |
| * @reason: The reason for the queue depth change. |
| * |
| * This function is called by the midlayer and the LLD to alter the queue |
| * depth for a scsi device. This function sets the queue depth to the new |
| * value and sends an event out to log the queue depth change. |
| **/ |
| static int |
| lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) |
| { |
| struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_rport_data *rdata; |
| unsigned long new_queue_depth, old_queue_depth; |
| |
| old_queue_depth = sdev->queue_depth; |
| |
| switch (reason) { |
| case SCSI_QDEPTH_DEFAULT: |
| /* change request from sysfs, fall through */ |
| case SCSI_QDEPTH_RAMP_UP: |
| scsi_adjust_queue_depth(sdev, qdepth); |
| break; |
| case SCSI_QDEPTH_QFULL: |
| if (scsi_track_queue_full(sdev, qdepth) == 0) |
| return sdev->queue_depth; |
| |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "0711 detected queue full - lun queue " |
| "depth adjusted to %d.\n", sdev->queue_depth); |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| new_queue_depth = sdev->queue_depth; |
| rdata = lpfc_rport_data_from_scsi_device(sdev); |
| if (rdata) |
| lpfc_send_sdev_queuedepth_change_event(phba, vport, |
| rdata->pnode, sdev->lun, |
| old_queue_depth, |
| new_queue_depth); |
| return sdev->queue_depth; |
| } |
| |
| /** |
| * 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; |
| unsigned long expires; |
| |
| spin_lock_irqsave(&phba->hbalock, flags); |
| atomic_inc(&phba->num_rsrc_err); |
| phba->last_rsrc_error_time = jiffies; |
| |
| expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL; |
| if (time_after(expires, 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_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; |
| unsigned long num_rsrc_err, num_cmd_success; |
| int i; |
| |
| num_rsrc_err = atomic_read(&phba->num_rsrc_err); |
| num_cmd_success = atomic_read(&phba->num_cmd_success); |
| |
| /* |
| * The error and success command counters are global per |
| * driver instance. If another handler has already |
| * operated on this error event, just exit. |
| */ |
| if (num_rsrc_err == 0) |
| return; |
| |
| vports = lpfc_create_vport_work_array(phba); |
| if (vports != NULL) |
| for (i = 0; i <= phba->max_vports && 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; |
| lpfc_change_queue_depth(sdev, new_queue_depth, |
| SCSI_QDEPTH_DEFAULT); |
| } |
| } |
| 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_vports && 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_s3 - Scsi buffer allocator for HBA with SLI3 IF spec |
| * @vport: The virtual port for which this call being executed. |
| * @num_to_allocate: The requested number of buffers to allocate. |
| * |
| * This routine allocates a scsi buffer for device with SLI-3 interface spec, |
| * the scsi buffer 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: |
| * int - number of scsi buffers that were allocated. |
| * 0 = failure, less than num_to_alloc is a partial failure. |
| **/ |
| static int |
| lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc) |
| { |
| 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; |
| int bcnt, bpl_size; |
| |
| bpl_size = phba->cfg_sg_dma_buf_size - |
| (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); |
| |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", |
| num_to_alloc, phba->cfg_sg_dma_buf_size, |
| (int)sizeof(struct fcp_cmnd), |
| (int)sizeof(struct fcp_rsp), bpl_size); |
| |
| for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { |
| psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); |
| if (!psb) |
| break; |
| |
| /* |
| * 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); |
| break; |
| } |
| |
| /* 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); |
| break; |
| } |
| 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 response 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; |
| psb->status = IOSTAT_SUCCESS; |
| /* Put it back into the SCSI buffer list */ |
| psb->cur_iocbq.context1 = psb; |
| lpfc_release_scsi_buf_s3(phba, psb); |
| |
| } |
| |
| return bcnt; |
| } |
| |
| /** |
| * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport |
| * @vport: pointer to lpfc vport data structure. |
| * |
| * This routine is invoked by the vport cleanup for deletions and the cleanup |
| * for an ndlp on removal. |
| **/ |
| void |
| lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport) |
| { |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_scsi_buf *psb, *next_psb; |
| unsigned long iflag = 0; |
| |
| spin_lock_irqsave(&phba->hbalock, iflag); |
| spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); |
| list_for_each_entry_safe(psb, next_psb, |
| &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { |
| if (psb->rdata && psb->rdata->pnode |
| && psb->rdata->pnode->vport == vport) |
| psb->rdata = NULL; |
| } |
| spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); |
| spin_unlock_irqrestore(&phba->hbalock, iflag); |
| } |
| |
| /** |
| * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort |
| * @phba: pointer to lpfc hba data structure. |
| * @axri: pointer to the fcp xri abort wcqe structure. |
| * |
| * This routine is invoked by the worker thread to process a SLI4 fast-path |
| * FCP aborted xri. |
| **/ |
| void |
| lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba, |
| struct sli4_wcqe_xri_aborted *axri) |
| { |
| uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri); |
| uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri); |
| struct lpfc_scsi_buf *psb, *next_psb; |
| unsigned long iflag = 0; |
| struct lpfc_iocbq *iocbq; |
| int i; |
| struct lpfc_nodelist *ndlp; |
| int rrq_empty = 0; |
| struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING]; |
| |
| spin_lock_irqsave(&phba->hbalock, iflag); |
| spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock); |
| list_for_each_entry_safe(psb, next_psb, |
| &phba->sli4_hba.lpfc_abts_scsi_buf_list, list) { |
| if (psb->cur_iocbq.sli4_xritag == xri) { |
| list_del(&psb->list); |
| psb->exch_busy = 0; |
| psb->status = IOSTAT_SUCCESS; |
| spin_unlock( |
| &phba->sli4_hba.abts_scsi_buf_list_lock); |
| if (psb->rdata && psb->rdata->pnode) |
| ndlp = psb->rdata->pnode; |
| else |
| ndlp = NULL; |
| |
| rrq_empty = list_empty(&phba->active_rrq_list); |
| spin_unlock_irqrestore(&phba->hbalock, iflag); |
| if (ndlp) { |
| lpfc_set_rrq_active(phba, ndlp, |
| psb->cur_iocbq.sli4_lxritag, rxid, 1); |
| lpfc_sli4_abts_err_handler(phba, ndlp, axri); |
| } |
| lpfc_release_scsi_buf_s4(phba, psb); |
| if (rrq_empty) |
| lpfc_worker_wake_up(phba); |
| return; |
| } |
| } |
| spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock); |
| for (i = 1; i <= phba->sli.last_iotag; i++) { |
| iocbq = phba->sli.iocbq_lookup[i]; |
| |
| if (!(iocbq->iocb_flag & LPFC_IO_FCP) || |
| (iocbq->iocb_flag & LPFC_IO_LIBDFC)) |
| continue; |
| if (iocbq->sli4_xritag != xri) |
| continue; |
| psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq); |
| psb->exch_busy = 0; |
| spin_unlock_irqrestore(&phba->hbalock, iflag); |
| if (!list_empty(&pring->txq)) |
| lpfc_worker_wake_up(phba); |
| return; |
| |
| } |
| spin_unlock_irqrestore(&phba->hbalock, iflag); |
| } |
| |
| /** |
| * lpfc_sli4_post_scsi_sgl_list - Psot blocks of scsi buffer sgls from a list |
| * @phba: pointer to lpfc hba data structure. |
| * @post_sblist: pointer to the scsi buffer list. |
| * |
| * This routine walks a list of scsi buffers that was passed in. It attempts |
| * to construct blocks of scsi buffer sgls which contains contiguous xris and |
| * uses the non-embedded SGL block post mailbox commands to post to the port. |
| * For single SCSI buffer sgl with non-contiguous xri, if any, it shall use |
| * embedded SGL post mailbox command for posting. The @post_sblist passed in |
| * must be local list, thus no lock is needed when manipulate the list. |
| * |
| * Returns: 0 = failure, non-zero number of successfully posted buffers. |
| **/ |
| static int |
| lpfc_sli4_post_scsi_sgl_list(struct lpfc_hba *phba, |
| struct list_head *post_sblist, int sb_count) |
| { |
| struct lpfc_scsi_buf *psb, *psb_next; |
| int status, sgl_size; |
| int post_cnt = 0, block_cnt = 0, num_posting = 0, num_posted = 0; |
| dma_addr_t pdma_phys_bpl1; |
| int last_xritag = NO_XRI; |
| LIST_HEAD(prep_sblist); |
| LIST_HEAD(blck_sblist); |
| LIST_HEAD(scsi_sblist); |
| |
| /* sanity check */ |
| if (sb_count <= 0) |
| return -EINVAL; |
| |
| sgl_size = phba->cfg_sg_dma_buf_size - |
| (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); |
| |
| list_for_each_entry_safe(psb, psb_next, post_sblist, list) { |
| list_del_init(&psb->list); |
| block_cnt++; |
| if ((last_xritag != NO_XRI) && |
| (psb->cur_iocbq.sli4_xritag != last_xritag + 1)) { |
| /* a hole in xri block, form a sgl posting block */ |
| list_splice_init(&prep_sblist, &blck_sblist); |
| post_cnt = block_cnt - 1; |
| /* prepare list for next posting block */ |
| list_add_tail(&psb->list, &prep_sblist); |
| block_cnt = 1; |
| } else { |
| /* prepare list for next posting block */ |
| list_add_tail(&psb->list, &prep_sblist); |
| /* enough sgls for non-embed sgl mbox command */ |
| if (block_cnt == LPFC_NEMBED_MBOX_SGL_CNT) { |
| list_splice_init(&prep_sblist, &blck_sblist); |
| post_cnt = block_cnt; |
| block_cnt = 0; |
| } |
| } |
| num_posting++; |
| last_xritag = psb->cur_iocbq.sli4_xritag; |
| |
| /* end of repost sgl list condition for SCSI buffers */ |
| if (num_posting == sb_count) { |
| if (post_cnt == 0) { |
| /* last sgl posting block */ |
| list_splice_init(&prep_sblist, &blck_sblist); |
| post_cnt = block_cnt; |
| } else if (block_cnt == 1) { |
| /* last single sgl with non-contiguous xri */ |
| if (sgl_size > SGL_PAGE_SIZE) |
| pdma_phys_bpl1 = psb->dma_phys_bpl + |
| SGL_PAGE_SIZE; |
| else |
| pdma_phys_bpl1 = 0; |
| status = lpfc_sli4_post_sgl(phba, |
| psb->dma_phys_bpl, |
| pdma_phys_bpl1, |
| psb->cur_iocbq.sli4_xritag); |
| if (status) { |
| /* failure, put on abort scsi list */ |
| psb->exch_busy = 1; |
| } else { |
| /* success, put on SCSI buffer list */ |
| psb->exch_busy = 0; |
| psb->status = IOSTAT_SUCCESS; |
| num_posted++; |
| } |
| /* success, put on SCSI buffer sgl list */ |
| list_add_tail(&psb->list, &scsi_sblist); |
| } |
| } |
| |
| /* continue until a nembed page worth of sgls */ |
| if (post_cnt == 0) |
| continue; |
| |
| /* post block of SCSI buffer list sgls */ |
| status = lpfc_sli4_post_scsi_sgl_block(phba, &blck_sblist, |
| post_cnt); |
| |
| /* don't reset xirtag due to hole in xri block */ |
| if (block_cnt == 0) |
| last_xritag = NO_XRI; |
| |
| /* reset SCSI buffer post count for next round of posting */ |
| post_cnt = 0; |
| |
| /* put posted SCSI buffer-sgl posted on SCSI buffer sgl list */ |
| while (!list_empty(&blck_sblist)) { |
| list_remove_head(&blck_sblist, psb, |
| struct lpfc_scsi_buf, list); |
| if (status) { |
| /* failure, put on abort scsi list */ |
| psb->exch_busy = 1; |
| } else { |
| /* success, put on SCSI buffer list */ |
| psb->exch_busy = 0; |
| psb->status = IOSTAT_SUCCESS; |
| num_posted++; |
| } |
| list_add_tail(&psb->list, &scsi_sblist); |
| } |
| } |
| /* Push SCSI buffers with sgl posted to the availble list */ |
| while (!list_empty(&scsi_sblist)) { |
| list_remove_head(&scsi_sblist, psb, |
| struct lpfc_scsi_buf, list); |
| lpfc_release_scsi_buf_s4(phba, psb); |
| } |
| return num_posted; |
| } |
| |
| /** |
| * lpfc_sli4_repost_scsi_sgl_list - Repsot all the allocated scsi buffer sgls |
| * @phba: pointer to lpfc hba data structure. |
| * |
| * This routine walks the list of scsi buffers that have been allocated and |
| * repost them to the port by using SGL block post. This is needed after a |
| * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine |
| * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list |
| * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers. |
| * |
| * Returns: 0 = success, non-zero failure. |
| **/ |
| int |
| lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba) |
| { |
| LIST_HEAD(post_sblist); |
| int num_posted, rc = 0; |
| |
| /* get all SCSI buffers need to repost to a local list */ |
| spin_lock_irq(&phba->scsi_buf_list_get_lock); |
| spin_lock(&phba->scsi_buf_list_put_lock); |
| list_splice_init(&phba->lpfc_scsi_buf_list_get, &post_sblist); |
| list_splice(&phba->lpfc_scsi_buf_list_put, &post_sblist); |
| spin_unlock(&phba->scsi_buf_list_put_lock); |
| spin_unlock_irq(&phba->scsi_buf_list_get_lock); |
| |
| /* post the list of scsi buffer sgls to port if available */ |
| if (!list_empty(&post_sblist)) { |
| num_posted = lpfc_sli4_post_scsi_sgl_list(phba, &post_sblist, |
| phba->sli4_hba.scsi_xri_cnt); |
| /* failed to post any scsi buffer, return error */ |
| if (num_posted == 0) |
| rc = -EIO; |
| } |
| return rc; |
| } |
| |
| /** |
| * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec |
| * @vport: The virtual port for which this call being executed. |
| * @num_to_allocate: The requested number of buffers to allocate. |
| * |
| * This routine allocates scsi buffers for device with SLI-4 interface spec, |
| * the scsi buffer contains all the necessary information needed to initiate |
| * a SCSI I/O. After allocating up to @num_to_allocate SCSI buffers and put |
| * them on a list, it post them to the port by using SGL block post. |
| * |
| * Return codes: |
| * int - number of scsi buffers that were allocated and posted. |
| * 0 = failure, less than num_to_alloc is a partial failure. |
| **/ |
| static int |
| lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc) |
| { |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_scsi_buf *psb; |
| struct sli4_sge *sgl; |
| 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, lxri = 0; |
| int bcnt, num_posted, sgl_size; |
| LIST_HEAD(prep_sblist); |
| LIST_HEAD(post_sblist); |
| LIST_HEAD(scsi_sblist); |
| |
| sgl_size = phba->cfg_sg_dma_buf_size - |
| (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp)); |
| |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "9068 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n", |
| num_to_alloc, phba->cfg_sg_dma_buf_size, sgl_size, |
| (int)sizeof(struct fcp_cmnd), |
| (int)sizeof(struct fcp_rsp)); |
| |
| for (bcnt = 0; bcnt < num_to_alloc; bcnt++) { |
| psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); |
| if (!psb) |
| break; |
| /* |
| * 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); |
| break; |
| } |
| memset(psb->data, 0, phba->cfg_sg_dma_buf_size); |
| |
| /* |
| * 4K Page alignment is CRITICAL to BlockGuard, double check |
| * to be sure. |
| */ |
| if (phba->cfg_enable_bg && (((unsigned long)(psb->data) & |
| (unsigned long)(SLI4_PAGE_SIZE - 1)) != 0)) { |
| pci_pool_free(phba->lpfc_scsi_dma_buf_pool, |
| psb->data, psb->dma_handle); |
| kfree(psb); |
| break; |
| } |
| |
| |
| lxri = lpfc_sli4_next_xritag(phba); |
| if (lxri == NO_XRI) { |
| pci_pool_free(phba->lpfc_scsi_dma_buf_pool, |
| psb->data, psb->dma_handle); |
| kfree(psb); |
| break; |
| } |
| |
| /* 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); |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "3368 Failed to allocated IOTAG for" |
| " XRI:0x%x\n", lxri); |
| lpfc_sli4_free_xri(phba, lxri); |
| break; |
| } |
| psb->cur_iocbq.sli4_lxritag = lxri; |
| psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri]; |
| psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; |
| psb->fcp_bpl = psb->data; |
| psb->fcp_cmnd = (psb->data + sgl_size); |
| psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd + |
| sizeof(struct fcp_cmnd)); |
| |
| /* Initialize local short-hand pointers. */ |
| sgl = (struct sli4_sge *)psb->fcp_bpl; |
| pdma_phys_bpl = psb->dma_handle; |
| pdma_phys_fcp_cmd = (psb->dma_handle + sgl_size); |
| pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd); |
| |
| /* |
| * 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. |
| */ |
| sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd)); |
| sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd)); |
| sgl->word2 = le32_to_cpu(sgl->word2); |
| bf_set(lpfc_sli4_sge_last, sgl, 0); |
| sgl->word2 = cpu_to_le32(sgl->word2); |
| sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd)); |
| sgl++; |
| |
| /* Setup the physical region for the FCP RSP */ |
| sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp)); |
| sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp)); |
| sgl->word2 = le32_to_cpu(sgl->word2); |
| bf_set(lpfc_sli4_sge_last, sgl, 1); |
| sgl->word2 = cpu_to_le32(sgl->word2); |
| sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp)); |
| |
| /* |
| * 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; |
| iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64; |
| /* setting the BLP size to 2 * sizeof BDE may not be correct. |
| * We are setting the bpl to point to out sgl. An sgl's |
| * entries are 16 bytes, a bpl entries are 12 bytes. |
| */ |
| iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd); |
| iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd); |
| iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd); |
| iocb->ulpBdeCount = 1; |
| iocb->ulpLe = 1; |
| iocb->ulpClass = CLASS3; |
| psb->cur_iocbq.context1 = psb; |
| psb->dma_phys_bpl = pdma_phys_bpl; |
| |
| /* add the scsi buffer to a post list */ |
| list_add_tail(&psb->list, &post_sblist); |
| spin_lock_irq(&phba->scsi_buf_list_get_lock); |
| phba->sli4_hba.scsi_xri_cnt++; |
| spin_unlock_irq(&phba->scsi_buf_list_get_lock); |
| } |
| lpfc_printf_log(phba, KERN_INFO, LOG_BG, |
| "3021 Allocate %d out of %d requested new SCSI " |
| "buffers\n", bcnt, num_to_alloc); |
| |
| /* post the list of scsi buffer sgls to port if available */ |
| if (!list_empty(&post_sblist)) |
| num_posted = lpfc_sli4_post_scsi_sgl_list(phba, |
| &post_sblist, bcnt); |
| else |
| num_posted = 0; |
| |
| return num_posted; |
| } |
| |
| /** |
| * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator |
| * @vport: The virtual port for which this call being executed. |
| * @num_to_allocate: The requested number of buffers to allocate. |
| * |
| * This routine wraps the actual SCSI buffer allocator function pointer from |
| * the lpfc_hba struct. |
| * |
| * Return codes: |
| * int - number of scsi buffers that were allocated. |
| * 0 = failure, less than num_to_alloc is a partial failure. |
| **/ |
| static inline int |
| lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc) |
| { |
| return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc); |
| } |
| |
| /** |
| * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the 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_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) |
| { |
| struct lpfc_scsi_buf * lpfc_cmd = NULL; |
| struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get; |
| unsigned long iflag = 0; |
| |
| spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); |
| list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_scsi_buf, |
| list); |
| if (!lpfc_cmd) { |
| spin_lock(&phba->scsi_buf_list_put_lock); |
| list_splice(&phba->lpfc_scsi_buf_list_put, |
| &phba->lpfc_scsi_buf_list_get); |
| INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); |
| list_remove_head(scsi_buf_list_get, lpfc_cmd, |
| struct lpfc_scsi_buf, list); |
| spin_unlock(&phba->scsi_buf_list_put_lock); |
| } |
| spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); |
| return lpfc_cmd; |
| } |
| /** |
| * lpfc_get_scsi_buf_s4 - Get a scsi buffer from lpfc_scsi_buf_list of the 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_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp) |
| { |
| struct lpfc_scsi_buf *lpfc_cmd, *lpfc_cmd_next; |
| unsigned long iflag = 0; |
| int found = 0; |
| |
| spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag); |
| list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next, |
| &phba->lpfc_scsi_buf_list_get, list) { |
| if (lpfc_test_rrq_active(phba, ndlp, |
| lpfc_cmd->cur_iocbq.sli4_lxritag)) |
| continue; |
| list_del(&lpfc_cmd->list); |
| found = 1; |
| break; |
| } |
| if (!found) { |
| spin_lock(&phba->scsi_buf_list_put_lock); |
| list_splice(&phba->lpfc_scsi_buf_list_put, |
| &phba->lpfc_scsi_buf_list_get); |
| INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put); |
| spin_unlock(&phba->scsi_buf_list_put_lock); |
| list_for_each_entry_safe(lpfc_cmd, lpfc_cmd_next, |
| &phba->lpfc_scsi_buf_list_get, list) { |
| if (lpfc_test_rrq_active( |
| phba, ndlp, lpfc_cmd->cur_iocbq.sli4_lxritag)) |
| continue; |
| list_del(&lpfc_cmd->list); |
| found = 1; |
| break; |
| } |
| } |
| spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag); |
| if (!found) |
| return NULL; |
| return lpfc_cmd; |
| } |
| /** |
| * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the 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_nodelist *ndlp) |
| { |
| return phba->lpfc_get_scsi_buf(phba, ndlp); |
| } |
| |
| /** |
| * lpfc_release_scsi_buf - Return a scsi buffer back to hba 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_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) |
| { |
| unsigned long iflag = 0; |
| |
| psb->seg_cnt = 0; |
| psb->nonsg_phys = 0; |
| psb->prot_seg_cnt = 0; |
| |
| spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); |
| psb->pCmd = NULL; |
| psb->cur_iocbq.iocb_flag = LPFC_IO_FCP; |
| list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); |
| spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); |
| } |
| |
| /** |
| * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba 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. For SLI4 XRI's are tied to the scsi buffer |
| * and cannot be reused for at least RA_TOV amount of time if it was |
| * aborted. |
| **/ |
| static void |
| lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) |
| { |
| unsigned long iflag = 0; |
| |
| psb->seg_cnt = 0; |
| psb->nonsg_phys = 0; |
| psb->prot_seg_cnt = 0; |
| |
| if (psb->exch_busy) { |
| spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock, |
| iflag); |
| psb->pCmd = NULL; |
| list_add_tail(&psb->list, |
| &phba->sli4_hba.lpfc_abts_scsi_buf_list); |
| spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock, |
| iflag); |
| } else { |
| psb->pCmd = NULL; |
| psb->cur_iocbq.iocb_flag = LPFC_IO_FCP; |
| spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag); |
| list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put); |
| spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag); |
| } |
| } |
| |
| /** |
| * lpfc_release_scsi_buf: Return a scsi buffer back to hba 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) |
| { |
| |
| phba->lpfc_release_scsi_buf(phba, psb); |
| } |
| |
| /** |
| * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec |
| * @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 for device with SLI-3 interface spec. 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_s3(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; |
| struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq; |
| 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) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9064 BLKGRD: %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); |
| lpfc_cmd->seg_cnt = 0; |
| 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) && |
| !(iocbq->iocb_flag & DSS_SECURITY_OP) && |
| 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) && |
| !(iocbq->iocb_flag & DSS_SECURITY_OP)) { |
| 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 response bde and data bpl */ |
| iocb_cmd->unsli3.fcp_ext.ebde_count = 2; |
| } else { |
| /* ebde count includes the response 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)); |
| iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1); |
| } |
| 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; |
| } |
| |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| |
| /* Return if if error injection is detected by Initiator */ |
| #define BG_ERR_INIT 0x1 |
| /* Return if if error injection is detected by Target */ |
| #define BG_ERR_TGT 0x2 |
| /* Return if if swapping CSUM<-->CRC is required for error injection */ |
| #define BG_ERR_SWAP 0x10 |
| /* Return if disabling Guard/Ref/App checking is required for error injection */ |
| #define BG_ERR_CHECK 0x20 |
| |
| /** |
| * lpfc_bg_err_inject - Determine if we should inject an error |
| * @phba: The Hba for which this call is being executed. |
| * @sc: The SCSI command to examine |
| * @reftag: (out) BlockGuard reference tag for transmitted data |
| * @apptag: (out) BlockGuard application tag for transmitted data |
| * @new_guard (in) Value to replace CRC with if needed |
| * |
| * Returns BG_ERR_* bit mask or 0 if request ignored |
| **/ |
| static int |
| lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc, |
| uint32_t *reftag, uint16_t *apptag, uint32_t new_guard) |
| { |
| struct scatterlist *sgpe; /* s/g prot entry */ |
| struct scatterlist *sgde; /* s/g data entry */ |
| struct lpfc_scsi_buf *lpfc_cmd = NULL; |
| struct scsi_dif_tuple *src = NULL; |
| struct lpfc_nodelist *ndlp; |
| struct lpfc_rport_data *rdata; |
| uint32_t op = scsi_get_prot_op(sc); |
| uint32_t blksize; |
| uint32_t numblks; |
| sector_t lba; |
| int rc = 0; |
| int blockoff = 0; |
| |
| if (op == SCSI_PROT_NORMAL) |
| return 0; |
| |
| sgpe = scsi_prot_sglist(sc); |
| sgde = scsi_sglist(sc); |
| lba = scsi_get_lba(sc); |
| |
| /* First check if we need to match the LBA */ |
| if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) { |
| blksize = lpfc_cmd_blksize(sc); |
| numblks = (scsi_bufflen(sc) + blksize - 1) / blksize; |
| |
| /* Make sure we have the right LBA if one is specified */ |
| if ((phba->lpfc_injerr_lba < lba) || |
| (phba->lpfc_injerr_lba >= (lba + numblks))) |
| return 0; |
| if (sgpe) { |
| blockoff = phba->lpfc_injerr_lba - lba; |
| numblks = sg_dma_len(sgpe) / |
| sizeof(struct scsi_dif_tuple); |
| if (numblks < blockoff) |
| blockoff = numblks; |
| } |
| } |
| |
| /* Next check if we need to match the remote NPortID or WWPN */ |
| rdata = lpfc_rport_data_from_scsi_device(sc->device); |
| if (rdata && rdata->pnode) { |
| ndlp = rdata->pnode; |
| |
| /* Make sure we have the right NPortID if one is specified */ |
| if (phba->lpfc_injerr_nportid && |
| (phba->lpfc_injerr_nportid != ndlp->nlp_DID)) |
| return 0; |
| |
| /* |
| * Make sure we have the right WWPN if one is specified. |
| * wwn[0] should be a non-zero NAA in a good WWPN. |
| */ |
| if (phba->lpfc_injerr_wwpn.u.wwn[0] && |
| (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn, |
| sizeof(struct lpfc_name)) != 0)) |
| return 0; |
| } |
| |
| /* Setup a ptr to the protection data if the SCSI host provides it */ |
| if (sgpe) { |
| src = (struct scsi_dif_tuple *)sg_virt(sgpe); |
| src += blockoff; |
| lpfc_cmd = (struct lpfc_scsi_buf *)sc->host_scribble; |
| } |
| |
| /* Should we change the Reference Tag */ |
| if (reftag) { |
| if (phba->lpfc_injerr_wref_cnt) { |
| switch (op) { |
| case SCSI_PROT_WRITE_PASS: |
| if (src) { |
| /* |
| * For WRITE_PASS, force the error |
| * to be sent on the wire. It should |
| * be detected by the Target. |
| * If blockoff != 0 error will be |
| * inserted in middle of the IO. |
| */ |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9076 BLKGRD: Injecting reftag error: " |
| "write lba x%lx + x%x oldrefTag x%x\n", |
| (unsigned long)lba, blockoff, |
| be32_to_cpu(src->ref_tag)); |
| |
| /* |
| * Save the old ref_tag so we can |
| * restore it on completion. |
| */ |
| if (lpfc_cmd) { |
| lpfc_cmd->prot_data_type = |
| LPFC_INJERR_REFTAG; |
| lpfc_cmd->prot_data_segment = |
| src; |
| lpfc_cmd->prot_data = |
| src->ref_tag; |
| } |
| src->ref_tag = cpu_to_be32(0xDEADBEEF); |
| phba->lpfc_injerr_wref_cnt--; |
| if (phba->lpfc_injerr_wref_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| rc = BG_ERR_TGT | BG_ERR_CHECK; |
| |
| break; |
| } |
| /* Drop thru */ |
| case SCSI_PROT_WRITE_INSERT: |
| /* |
| * For WRITE_INSERT, force the error |
| * to be sent on the wire. It should be |
| * detected by the Target. |
| */ |
| /* DEADBEEF will be the reftag on the wire */ |
| *reftag = 0xDEADBEEF; |
| phba->lpfc_injerr_wref_cnt--; |
| if (phba->lpfc_injerr_wref_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| rc = BG_ERR_TGT | BG_ERR_CHECK; |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9078 BLKGRD: Injecting reftag error: " |
| "write lba x%lx\n", (unsigned long)lba); |
| break; |
| case SCSI_PROT_WRITE_STRIP: |
| /* |
| * For WRITE_STRIP and WRITE_PASS, |
| * force the error on data |
| * being copied from SLI-Host to SLI-Port. |
| */ |
| *reftag = 0xDEADBEEF; |
| phba->lpfc_injerr_wref_cnt--; |
| if (phba->lpfc_injerr_wref_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| rc = BG_ERR_INIT; |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9077 BLKGRD: Injecting reftag error: " |
| "write lba x%lx\n", (unsigned long)lba); |
| break; |
| } |
| } |
| if (phba->lpfc_injerr_rref_cnt) { |
| switch (op) { |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_READ_PASS: |
| /* |
| * For READ_STRIP and READ_PASS, force the |
| * error on data being read off the wire. It |
| * should force an IO error to the driver. |
| */ |
| *reftag = 0xDEADBEEF; |
| phba->lpfc_injerr_rref_cnt--; |
| if (phba->lpfc_injerr_rref_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| rc = BG_ERR_INIT; |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9079 BLKGRD: Injecting reftag error: " |
| "read lba x%lx\n", (unsigned long)lba); |
| break; |
| } |
| } |
| } |
| |
| /* Should we change the Application Tag */ |
| if (apptag) { |
| if (phba->lpfc_injerr_wapp_cnt) { |
| switch (op) { |
| case SCSI_PROT_WRITE_PASS: |
| if (src) { |
| /* |
| * For WRITE_PASS, force the error |
| * to be sent on the wire. It should |
| * be detected by the Target. |
| * If blockoff != 0 error will be |
| * inserted in middle of the IO. |
| */ |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9080 BLKGRD: Injecting apptag error: " |
| "write lba x%lx + x%x oldappTag x%x\n", |
| (unsigned long)lba, blockoff, |
| be16_to_cpu(src->app_tag)); |
| |
| /* |
| * Save the old app_tag so we can |
| * restore it on completion. |
| */ |
| if (lpfc_cmd) { |
| lpfc_cmd->prot_data_type = |
| LPFC_INJERR_APPTAG; |
| lpfc_cmd->prot_data_segment = |
| src; |
| lpfc_cmd->prot_data = |
| src->app_tag; |
| } |
| src->app_tag = cpu_to_be16(0xDEAD); |
| phba->lpfc_injerr_wapp_cnt--; |
| if (phba->lpfc_injerr_wapp_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| rc = BG_ERR_TGT | BG_ERR_CHECK; |
| break; |
| } |
| /* Drop thru */ |
| case SCSI_PROT_WRITE_INSERT: |
| /* |
| * For WRITE_INSERT, force the |
| * error to be sent on the wire. It should be |
| * detected by the Target. |
| */ |
| /* DEAD will be the apptag on the wire */ |
| *apptag = 0xDEAD; |
| phba->lpfc_injerr_wapp_cnt--; |
| if (phba->lpfc_injerr_wapp_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| rc = BG_ERR_TGT | BG_ERR_CHECK; |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "0813 BLKGRD: Injecting apptag error: " |
| "write lba x%lx\n", (unsigned long)lba); |
| break; |
| case SCSI_PROT_WRITE_STRIP: |
| /* |
| * For WRITE_STRIP and WRITE_PASS, |
| * force the error on data |
| * being copied from SLI-Host to SLI-Port. |
| */ |
| *apptag = 0xDEAD; |
| phba->lpfc_injerr_wapp_cnt--; |
| if (phba->lpfc_injerr_wapp_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| rc = BG_ERR_INIT; |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "0812 BLKGRD: Injecting apptag error: " |
| "write lba x%lx\n", (unsigned long)lba); |
| break; |
| } |
| } |
| if (phba->lpfc_injerr_rapp_cnt) { |
| switch (op) { |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_READ_PASS: |
| /* |
| * For READ_STRIP and READ_PASS, force the |
| * error on data being read off the wire. It |
| * should force an IO error to the driver. |
| */ |
| *apptag = 0xDEAD; |
| phba->lpfc_injerr_rapp_cnt--; |
| if (phba->lpfc_injerr_rapp_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| rc = BG_ERR_INIT; |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "0814 BLKGRD: Injecting apptag error: " |
| "read lba x%lx\n", (unsigned long)lba); |
| break; |
| } |
| } |
| } |
| |
| |
| /* Should we change the Guard Tag */ |
| if (new_guard) { |
| if (phba->lpfc_injerr_wgrd_cnt) { |
| switch (op) { |
| case SCSI_PROT_WRITE_PASS: |
| rc = BG_ERR_CHECK; |
| /* Drop thru */ |
| |
| case SCSI_PROT_WRITE_INSERT: |
| /* |
| * For WRITE_INSERT, force the |
| * error to be sent on the wire. It should be |
| * detected by the Target. |
| */ |
| phba->lpfc_injerr_wgrd_cnt--; |
| if (phba->lpfc_injerr_wgrd_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| |
| rc |= BG_ERR_TGT | BG_ERR_SWAP; |
| /* Signals the caller to swap CRC->CSUM */ |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "0817 BLKGRD: Injecting guard error: " |
| "write lba x%lx\n", (unsigned long)lba); |
| break; |
| case SCSI_PROT_WRITE_STRIP: |
| /* |
| * For WRITE_STRIP and WRITE_PASS, |
| * force the error on data |
| * being copied from SLI-Host to SLI-Port. |
| */ |
| phba->lpfc_injerr_wgrd_cnt--; |
| if (phba->lpfc_injerr_wgrd_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| |
| rc = BG_ERR_INIT | BG_ERR_SWAP; |
| /* Signals the caller to swap CRC->CSUM */ |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "0816 BLKGRD: Injecting guard error: " |
| "write lba x%lx\n", (unsigned long)lba); |
| break; |
| } |
| } |
| if (phba->lpfc_injerr_rgrd_cnt) { |
| switch (op) { |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_READ_PASS: |
| /* |
| * For READ_STRIP and READ_PASS, force the |
| * error on data being read off the wire. It |
| * should force an IO error to the driver. |
| */ |
| phba->lpfc_injerr_rgrd_cnt--; |
| if (phba->lpfc_injerr_rgrd_cnt == 0) { |
| phba->lpfc_injerr_nportid = 0; |
| phba->lpfc_injerr_lba = |
| LPFC_INJERR_LBA_OFF; |
| memset(&phba->lpfc_injerr_wwpn, |
| 0, sizeof(struct lpfc_name)); |
| } |
| |
| rc = BG_ERR_INIT | BG_ERR_SWAP; |
| /* Signals the caller to swap CRC->CSUM */ |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "0818 BLKGRD: Injecting guard error: " |
| "read lba x%lx\n", (unsigned long)lba); |
| } |
| } |
| } |
| |
| return rc; |
| } |
| #endif |
| |
| /** |
| * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with |
| * the specified SCSI command. |
| * @phba: The Hba for which this call is being executed. |
| * @sc: The SCSI command to examine |
| * @txopt: (out) BlockGuard operation for transmitted data |
| * @rxopt: (out) BlockGuard operation for received data |
| * |
| * Returns: zero on success; non-zero if tx and/or rx op cannot be determined |
| * |
| **/ |
| static int |
| lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, |
| uint8_t *txop, uint8_t *rxop) |
| { |
| uint8_t ret = 0; |
| |
| if (lpfc_cmd_guard_csum(sc)) { |
| switch (scsi_get_prot_op(sc)) { |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_WRITE_STRIP: |
| *rxop = BG_OP_IN_NODIF_OUT_CSUM; |
| *txop = BG_OP_IN_CSUM_OUT_NODIF; |
| break; |
| |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_WRITE_INSERT: |
| *rxop = BG_OP_IN_CRC_OUT_NODIF; |
| *txop = BG_OP_IN_NODIF_OUT_CRC; |
| break; |
| |
| case SCSI_PROT_READ_PASS: |
| case SCSI_PROT_WRITE_PASS: |
| *rxop = BG_OP_IN_CRC_OUT_CSUM; |
| *txop = BG_OP_IN_CSUM_OUT_CRC; |
| break; |
| |
| case SCSI_PROT_NORMAL: |
| default: |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9063 BLKGRD: Bad op/guard:%d/IP combination\n", |
| scsi_get_prot_op(sc)); |
| ret = 1; |
| break; |
| |
| } |
| } else { |
| switch (scsi_get_prot_op(sc)) { |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_WRITE_INSERT: |
| *rxop = BG_OP_IN_CRC_OUT_NODIF; |
| *txop = BG_OP_IN_NODIF_OUT_CRC; |
| break; |
| |
| case SCSI_PROT_READ_PASS: |
| case SCSI_PROT_WRITE_PASS: |
| *rxop = BG_OP_IN_CRC_OUT_CRC; |
| *txop = BG_OP_IN_CRC_OUT_CRC; |
| break; |
| |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_WRITE_STRIP: |
| *rxop = BG_OP_IN_NODIF_OUT_CRC; |
| *txop = BG_OP_IN_CRC_OUT_NODIF; |
| break; |
| |
| case SCSI_PROT_NORMAL: |
| default: |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9075 BLKGRD: Bad op/guard:%d/CRC combination\n", |
| scsi_get_prot_op(sc)); |
| ret = 1; |
| break; |
| } |
| } |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| /** |
| * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with |
| * the specified SCSI command in order to force a guard tag error. |
| * @phba: The Hba for which this call is being executed. |
| * @sc: The SCSI command to examine |
| * @txopt: (out) BlockGuard operation for transmitted data |
| * @rxopt: (out) BlockGuard operation for received data |
| * |
| * Returns: zero on success; non-zero if tx and/or rx op cannot be determined |
| * |
| **/ |
| static int |
| lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc, |
| uint8_t *txop, uint8_t *rxop) |
| { |
| uint8_t ret = 0; |
| |
| if (lpfc_cmd_guard_csum(sc)) { |
| switch (scsi_get_prot_op(sc)) { |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_WRITE_STRIP: |
| *rxop = BG_OP_IN_NODIF_OUT_CRC; |
| *txop = BG_OP_IN_CRC_OUT_NODIF; |
| break; |
| |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_WRITE_INSERT: |
| *rxop = BG_OP_IN_CSUM_OUT_NODIF; |
| *txop = BG_OP_IN_NODIF_OUT_CSUM; |
| break; |
| |
| case SCSI_PROT_READ_PASS: |
| case SCSI_PROT_WRITE_PASS: |
| *rxop = BG_OP_IN_CSUM_OUT_CRC; |
| *txop = BG_OP_IN_CRC_OUT_CSUM; |
| break; |
| |
| case SCSI_PROT_NORMAL: |
| default: |
| break; |
| |
| } |
| } else { |
| switch (scsi_get_prot_op(sc)) { |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_WRITE_INSERT: |
| *rxop = BG_OP_IN_CSUM_OUT_NODIF; |
| *txop = BG_OP_IN_NODIF_OUT_CSUM; |
| break; |
| |
| case SCSI_PROT_READ_PASS: |
| case SCSI_PROT_WRITE_PASS: |
| *rxop = BG_OP_IN_CSUM_OUT_CSUM; |
| *txop = BG_OP_IN_CSUM_OUT_CSUM; |
| break; |
| |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_WRITE_STRIP: |
| *rxop = BG_OP_IN_NODIF_OUT_CSUM; |
| *txop = BG_OP_IN_CSUM_OUT_NODIF; |
| break; |
| |
| case SCSI_PROT_NORMAL: |
| default: |
| break; |
| } |
| } |
| |
| return ret; |
| } |
| #endif |
| |
| /** |
| * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data |
| * @phba: The Hba for which this call is being executed. |
| * @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 |
| * |
| * This function sets up BPL 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_5 | |
| * +-------------------------+ |
| * | PDE_6 | |
| * +-------------------------+ |
| * | Data BDE | |
| * +-------------------------+ |
| * |more Data BDE's ... (opt)| |
| * +-------------------------+ |
| * |
| * |
| * Note: Data s/g buffers have been dma mapped |
| * |
| * Returns the number of BDEs added to the BPL. |
| **/ |
| 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_pde5 *pde5 = NULL; |
| struct lpfc_pde6 *pde6 = NULL; |
| dma_addr_t physaddr; |
| int i = 0, num_bde = 0, status; |
| int datadir = sc->sc_data_direction; |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| uint32_t rc; |
| #endif |
| uint32_t checking = 1; |
| uint32_t reftag; |
| unsigned blksize; |
| uint8_t txop, rxop; |
| |
| status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); |
| if (status) |
| goto out; |
| |
| /* extract some info from the scsi command for pde*/ |
| blksize = lpfc_cmd_blksize(sc); |
| reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ |
| |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); |
| if (rc) { |
| if (rc & BG_ERR_SWAP) |
| lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); |
| if (rc & BG_ERR_CHECK) |
| checking = 0; |
| } |
| #endif |
| |
| /* setup PDE5 with what we have */ |
| pde5 = (struct lpfc_pde5 *) bpl; |
| memset(pde5, 0, sizeof(struct lpfc_pde5)); |
| bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); |
| |
| /* Endianness conversion if necessary for PDE5 */ |
| pde5->word0 = cpu_to_le32(pde5->word0); |
| pde5->reftag = cpu_to_le32(reftag); |
| |
| /* advance bpl and increment bde count */ |
| num_bde++; |
| bpl++; |
| pde6 = (struct lpfc_pde6 *) bpl; |
| |
| /* setup PDE6 with the rest of the info */ |
| memset(pde6, 0, sizeof(struct lpfc_pde6)); |
| bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); |
| bf_set(pde6_optx, pde6, txop); |
| bf_set(pde6_oprx, pde6, rxop); |
| |
| /* |
| * We only need to check the data on READs, for WRITEs |
| * protection data is automatically generated, not checked. |
| */ |
| if (datadir == DMA_FROM_DEVICE) { |
| if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) |
| bf_set(pde6_ce, pde6, checking); |
| else |
| bf_set(pde6_ce, pde6, 0); |
| |
| if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) |
| bf_set(pde6_re, pde6, checking); |
| else |
| bf_set(pde6_re, pde6, 0); |
| } |
| bf_set(pde6_ai, pde6, 1); |
| bf_set(pde6_ae, pde6, 0); |
| bf_set(pde6_apptagval, pde6, 0); |
| |
| /* Endianness conversion if necessary for PDE6 */ |
| pde6->word0 = cpu_to_le32(pde6->word0); |
| pde6->word1 = cpu_to_le32(pde6->word1); |
| pde6->word2 = cpu_to_le32(pde6->word2); |
| |
| /* advance bpl and increment bde count */ |
| 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; |
| } |
| |
| /** |
| * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data |
| * @phba: The Hba for which this call is being executed. |
| * @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 |
| * |
| * This function sets up BPL buffer list for protection groups of |
| * type LPFC_PG_TYPE_DIF |
| * |
| * 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_5 | |
| * +-------------------------+ |
| * | PDE_6 | |
| * +-------------------------+ |
| * | PDE_7 (Prot BDE) | |
| * +-------------------------+ |
| * | Data BDE | |
| * +-------------------------+ |
| * |more Data BDE's ... (opt)| |
| * +-------------------------+ |
| * start of new prot group --> | PDE_5 | |
| * +-------------------------+ |
| * | ... | |
| * +-------------------------+ |
| * |
| * Note: It is assumed that both data and protection s/g buffers have been |
| * mapped for DMA |
| * |
| * Returns the number of BDEs added to the BPL. |
| **/ |
| 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_pde5 *pde5 = NULL; |
| struct lpfc_pde6 *pde6 = NULL; |
| struct lpfc_pde7 *pde7 = NULL; |
| dma_addr_t dataphysaddr, protphysaddr; |
| unsigned short curr_data = 0, curr_prot = 0; |
| unsigned int split_offset; |
| unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; |
| unsigned int protgrp_blks, protgrp_bytes; |
| unsigned int remainder, subtotal; |
| int status; |
| int datadir = sc->sc_data_direction; |
| unsigned char pgdone = 0, alldone = 0; |
| unsigned blksize; |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| uint32_t rc; |
| #endif |
| uint32_t checking = 1; |
| uint32_t reftag; |
| uint8_t txop, rxop; |
| 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; |
| } |
| |
| status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); |
| if (status) |
| goto out; |
| |
| /* extract some info from the scsi command */ |
| blksize = lpfc_cmd_blksize(sc); |
| reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ |
| |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); |
| if (rc) { |
| if (rc & BG_ERR_SWAP) |
| lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); |
| if (rc & BG_ERR_CHECK) |
| checking = 0; |
| } |
| #endif |
| |
| split_offset = 0; |
| do { |
| /* Check to see if we ran out of space */ |
| if (num_bde >= (phba->cfg_total_seg_cnt - 2)) |
| return num_bde + 3; |
| |
| /* setup PDE5 with what we have */ |
| pde5 = (struct lpfc_pde5 *) bpl; |
| memset(pde5, 0, sizeof(struct lpfc_pde5)); |
| bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR); |
| |
| /* Endianness conversion if necessary for PDE5 */ |
| pde5->word0 = cpu_to_le32(pde5->word0); |
| pde5->reftag = cpu_to_le32(reftag); |
| |
| /* advance bpl and increment bde count */ |
| num_bde++; |
| bpl++; |
| pde6 = (struct lpfc_pde6 *) bpl; |
| |
| /* setup PDE6 with the rest of the info */ |
| memset(pde6, 0, sizeof(struct lpfc_pde6)); |
| bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR); |
| bf_set(pde6_optx, pde6, txop); |
| bf_set(pde6_oprx, pde6, rxop); |
| |
| if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) |
| bf_set(pde6_ce, pde6, checking); |
| else |
| bf_set(pde6_ce, pde6, 0); |
| |
| if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) |
| bf_set(pde6_re, pde6, checking); |
| else |
| bf_set(pde6_re, pde6, 0); |
| |
| bf_set(pde6_ai, pde6, 1); |
| bf_set(pde6_ae, pde6, 0); |
| bf_set(pde6_apptagval, pde6, 0); |
| |
| /* Endianness conversion if necessary for PDE6 */ |
| pde6->word0 = cpu_to_le32(pde6->word0); |
| pde6->word1 = cpu_to_le32(pde6->word1); |
| pde6->word2 = cpu_to_le32(pde6->word2); |
| |
| /* advance bpl and increment bde count */ |
| num_bde++; |
| bpl++; |
| |
| /* setup the first BDE that points to protection buffer */ |
| protphysaddr = sg_dma_address(sgpe) + protgroup_offset; |
| protgroup_len = sg_dma_len(sgpe) - protgroup_offset; |
| |
| /* must be integer multiple of the DIF block length */ |
| BUG_ON(protgroup_len % 8); |
| |
| pde7 = (struct lpfc_pde7 *) bpl; |
| memset(pde7, 0, sizeof(struct lpfc_pde7)); |
| bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR); |
| |
| pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); |
| pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); |
| |
| protgrp_blks = protgroup_len / 8; |
| protgrp_bytes = protgrp_blks * blksize; |
| |
| /* check if this pde is crossing the 4K boundary; if so split */ |
| if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) { |
| protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff); |
| protgroup_offset += protgroup_remainder; |
| protgrp_blks = protgroup_remainder / 8; |
| protgrp_bytes = protgrp_blks * blksize; |
| } else { |
| protgroup_offset = 0; |
| 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) { |
| /* Check to see if we ran out of space */ |
| if (num_bde >= phba->cfg_total_seg_cnt) |
| return num_bde + 1; |
| |
| if (!sgde) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9065 BLKGRD:%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); |
| |
| } |
| |
| if (protgroup_offset) { |
| /* update the reference tag */ |
| reftag += protgrp_blks; |
| bpl++; |
| continue; |
| } |
| |
| /* 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 */ |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9054 BLKGRD: bug in %s\n", __func__); |
| } |
| |
| } while (!alldone); |
| out: |
| |
| return num_bde; |
| } |
| |
| /** |
| * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data |
| * @phba: The Hba for which this call is being executed. |
| * @sc: pointer to scsi command we're working on |
| * @sgl: pointer to buffer list for protection groups |
| * @datacnt: number of segments of data that have been dma mapped |
| * |
| * This function sets up SGL 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 --> | DI_SEED | |
| * +-------------------------+ |
| * | Data SGE | |
| * +-------------------------+ |
| * |more Data SGE's ... (opt)| |
| * +-------------------------+ |
| * |
| * |
| * Note: Data s/g buffers have been dma mapped |
| * |
| * Returns the number of SGEs added to the SGL. |
| **/ |
| static int |
| lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc, |
| struct sli4_sge *sgl, int datasegcnt) |
| { |
| struct scatterlist *sgde = NULL; /* s/g data entry */ |
| struct sli4_sge_diseed *diseed = NULL; |
| dma_addr_t physaddr; |
| int i = 0, num_sge = 0, status; |
| uint32_t reftag; |
| unsigned blksize; |
| uint8_t txop, rxop; |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| uint32_t rc; |
| #endif |
| uint32_t checking = 1; |
| uint32_t dma_len; |
| uint32_t dma_offset = 0; |
| |
| status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); |
| if (status) |
| goto out; |
| |
| /* extract some info from the scsi command for pde*/ |
| blksize = lpfc_cmd_blksize(sc); |
| reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ |
| |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); |
| if (rc) { |
| if (rc & BG_ERR_SWAP) |
| lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); |
| if (rc & BG_ERR_CHECK) |
| checking = 0; |
| } |
| #endif |
| |
| /* setup DISEED with what we have */ |
| diseed = (struct sli4_sge_diseed *) sgl; |
| memset(diseed, 0, sizeof(struct sli4_sge_diseed)); |
| bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); |
| |
| /* Endianness conversion if necessary */ |
| diseed->ref_tag = cpu_to_le32(reftag); |
| diseed->ref_tag_tran = diseed->ref_tag; |
| |
| /* |
| * We only need to check the data on READs, for WRITEs |
| * protection data is automatically generated, not checked. |
| */ |
| if (sc->sc_data_direction == DMA_FROM_DEVICE) { |
| if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) |
| bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); |
| else |
| bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); |
| |
| if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) |
| bf_set(lpfc_sli4_sge_dif_re, diseed, checking); |
| else |
| bf_set(lpfc_sli4_sge_dif_re, diseed, 0); |
| } |
| |
| /* setup DISEED with the rest of the info */ |
| bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); |
| bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); |
| |
| bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); |
| bf_set(lpfc_sli4_sge_dif_me, diseed, 0); |
| |
| /* Endianness conversion if necessary for DISEED */ |
| diseed->word2 = cpu_to_le32(diseed->word2); |
| diseed->word3 = cpu_to_le32(diseed->word3); |
| |
| /* advance bpl and increment sge count */ |
| num_sge++; |
| sgl++; |
| |
| /* assumption: caller has already run dma_map_sg on command data */ |
| scsi_for_each_sg(sc, sgde, datasegcnt, i) { |
| physaddr = sg_dma_address(sgde); |
| dma_len = sg_dma_len(sgde); |
| sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); |
| sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); |
| if ((i + 1) == datasegcnt) |
| bf_set(lpfc_sli4_sge_last, sgl, 1); |
| else |
| bf_set(lpfc_sli4_sge_last, sgl, 0); |
| bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); |
| bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); |
| |
| sgl->sge_len = cpu_to_le32(dma_len); |
| dma_offset += dma_len; |
| |
| sgl++; |
| num_sge++; |
| } |
| |
| out: |
| return num_sge; |
| } |
| |
| /** |
| * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data |
| * @phba: The Hba for which this call is being executed. |
| * @sc: pointer to scsi command we're working on |
| * @sgl: 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 |
| * |
| * This function sets up SGL buffer list for protection groups of |
| * type LPFC_PG_TYPE_DIF |
| * |
| * 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 --> | DISEED | |
| * +-------------------------+ |
| * | DIF (Prot SGE) | |
| * +-------------------------+ |
| * | Data SGE | |
| * +-------------------------+ |
| * |more Data SGE's ... (opt)| |
| * +-------------------------+ |
| * start of new prot group --> | DISEED | |
| * +-------------------------+ |
| * | ... | |
| * +-------------------------+ |
| * |
| * Note: It is assumed that both data and protection s/g buffers have been |
| * mapped for DMA |
| * |
| * Returns the number of SGEs added to the SGL. |
| **/ |
| static int |
| lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, |
| struct sli4_sge *sgl, int datacnt, int protcnt) |
| { |
| struct scatterlist *sgde = NULL; /* s/g data entry */ |
| struct scatterlist *sgpe = NULL; /* s/g prot entry */ |
| struct sli4_sge_diseed *diseed = NULL; |
| dma_addr_t dataphysaddr, protphysaddr; |
| unsigned short curr_data = 0, curr_prot = 0; |
| unsigned int split_offset; |
| unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder; |
| unsigned int protgrp_blks, protgrp_bytes; |
| unsigned int remainder, subtotal; |
| int status; |
| unsigned char pgdone = 0, alldone = 0; |
| unsigned blksize; |
| uint32_t reftag; |
| uint8_t txop, rxop; |
| uint32_t dma_len; |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| uint32_t rc; |
| #endif |
| uint32_t checking = 1; |
| uint32_t dma_offset = 0; |
| int num_sge = 0; |
| |
| sgpe = scsi_prot_sglist(sc); |
| sgde = scsi_sglist(sc); |
| |
| if (!sgpe || !sgde) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9082 Invalid s/g entry: data=0x%p prot=0x%p\n", |
| sgpe, sgde); |
| return 0; |
| } |
| |
| status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop); |
| if (status) |
| goto out; |
| |
| /* extract some info from the scsi command */ |
| blksize = lpfc_cmd_blksize(sc); |
| reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */ |
| |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1); |
| if (rc) { |
| if (rc & BG_ERR_SWAP) |
| lpfc_bg_err_opcodes(phba, sc, &txop, &rxop); |
| if (rc & BG_ERR_CHECK) |
| checking = 0; |
| } |
| #endif |
| |
| split_offset = 0; |
| do { |
| /* Check to see if we ran out of space */ |
| if (num_sge >= (phba->cfg_total_seg_cnt - 2)) |
| return num_sge + 3; |
| |
| /* setup DISEED with what we have */ |
| diseed = (struct sli4_sge_diseed *) sgl; |
| memset(diseed, 0, sizeof(struct sli4_sge_diseed)); |
| bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED); |
| |
| /* Endianness conversion if necessary */ |
| diseed->ref_tag = cpu_to_le32(reftag); |
| diseed->ref_tag_tran = diseed->ref_tag; |
| |
| if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) { |
| bf_set(lpfc_sli4_sge_dif_ce, diseed, checking); |
| |
| } else { |
| bf_set(lpfc_sli4_sge_dif_ce, diseed, 0); |
| /* |
| * When in this mode, the hardware will replace |
| * the guard tag from the host with a |
| * newly generated good CRC for the wire. |
| * Switch to raw mode here to avoid this |
| * behavior. What the host sends gets put on the wire. |
| */ |
| if (txop == BG_OP_IN_CRC_OUT_CRC) { |
| txop = BG_OP_RAW_MODE; |
| rxop = BG_OP_RAW_MODE; |
| } |
| } |
| |
| |
| if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF)) |
| bf_set(lpfc_sli4_sge_dif_re, diseed, checking); |
| else |
| bf_set(lpfc_sli4_sge_dif_re, diseed, 0); |
| |
| /* setup DISEED with the rest of the info */ |
| bf_set(lpfc_sli4_sge_dif_optx, diseed, txop); |
| bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop); |
| |
| bf_set(lpfc_sli4_sge_dif_ai, diseed, 1); |
| bf_set(lpfc_sli4_sge_dif_me, diseed, 0); |
| |
| /* Endianness conversion if necessary for DISEED */ |
| diseed->word2 = cpu_to_le32(diseed->word2); |
| diseed->word3 = cpu_to_le32(diseed->word3); |
| |
| /* advance sgl and increment bde count */ |
| num_sge++; |
| sgl++; |
| |
| /* setup the first BDE that points to protection buffer */ |
| protphysaddr = sg_dma_address(sgpe) + protgroup_offset; |
| protgroup_len = sg_dma_len(sgpe) - protgroup_offset; |
| |
| /* must be integer multiple of the DIF block length */ |
| BUG_ON(protgroup_len % 8); |
| |
| /* Now setup DIF SGE */ |
| sgl->word2 = 0; |
| bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF); |
| sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr)); |
| sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr)); |
| sgl->word2 = cpu_to_le32(sgl->word2); |
| |
| protgrp_blks = protgroup_len / 8; |
| protgrp_bytes = protgrp_blks * blksize; |
| |
| /* check if DIF SGE is crossing the 4K boundary; if so split */ |
| if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) { |
| protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff); |
| protgroup_offset += protgroup_remainder; |
| protgrp_blks = protgroup_remainder / 8; |
| protgrp_bytes = protgrp_blks * blksize; |
| } else { |
| protgroup_offset = 0; |
| curr_prot++; |
| } |
| |
| num_sge++; |
| |
| /* setup SGE's for data blocks associated with DIF data */ |
| pgdone = 0; |
| subtotal = 0; /* total bytes processed for current prot grp */ |
| while (!pgdone) { |
| /* Check to see if we ran out of space */ |
| if (num_sge >= phba->cfg_total_seg_cnt) |
| return num_sge + 1; |
| |
| if (!sgde) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9086 BLKGRD:%s Invalid data segment\n", |
| __func__); |
| return 0; |
| } |
| sgl++; |
| dataphysaddr = sg_dma_address(sgde) + split_offset; |
| |
| remainder = sg_dma_len(sgde) - split_offset; |
| |
| if ((subtotal + remainder) <= protgrp_bytes) { |
| /* we can use this whole buffer */ |
| dma_len = remainder; |
| split_offset = 0; |
| |
| if ((subtotal + remainder) == protgrp_bytes) |
| pgdone = 1; |
| } else { |
| /* must split this buffer with next prot grp */ |
| dma_len = protgrp_bytes - subtotal; |
| split_offset += dma_len; |
| } |
| |
| subtotal += dma_len; |
| |
| sgl->addr_lo = cpu_to_le32(putPaddrLow(dataphysaddr)); |
| sgl->addr_hi = cpu_to_le32(putPaddrHigh(dataphysaddr)); |
| bf_set(lpfc_sli4_sge_last, sgl, 0); |
| bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); |
| bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); |
| |
| sgl->sge_len = cpu_to_le32(dma_len); |
| dma_offset += dma_len; |
| |
| num_sge++; |
| curr_data++; |
| |
| if (split_offset) |
| break; |
| |
| /* Move to the next s/g segment if possible */ |
| sgde = sg_next(sgde); |
| } |
| |
| if (protgroup_offset) { |
| /* update the reference tag */ |
| reftag += protgrp_blks; |
| sgl++; |
| continue; |
| } |
| |
| /* are we done ? */ |
| if (curr_prot == protcnt) { |
| bf_set(lpfc_sli4_sge_last, sgl, 1); |
| alldone = 1; |
| } else if (curr_prot < protcnt) { |
| /* advance to next prot buffer */ |
| sgpe = sg_next(sgpe); |
| sgl++; |
| |
| /* update the reference tag */ |
| reftag += protgrp_blks; |
| } else { |
| /* if we're here, we have a bug */ |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9085 BLKGRD: bug in %s\n", __func__); |
| } |
| |
| } while (!alldone); |
| |
| out: |
| |
| return num_sge; |
| } |
| |
| /** |
| * lpfc_prot_group_type - Get prtotection group type of SCSI command |
| * @phba: The Hba for which this call is being executed. |
| * @sc: pointer to scsi command we're working on |
| * |
| * Given a SCSI command that supports DIF, determine composition of protection |
| * groups involved in setting up buffer lists |
| * |
| * Returns: Protection group type (with or without DIF) |
| * |
| **/ |
| 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: |
| ret = LPFC_PG_TYPE_DIF_BUF; |
| break; |
| default: |
| if (phba) |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9021 Unsupported protection op:%d\n", |
| op); |
| break; |
| } |
| return ret; |
| } |
| |
| /** |
| * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard |
| * @phba: The Hba for which this call is being executed. |
| * @lpfc_cmd: The scsi buffer which is going to be adjusted. |
| * |
| * Adjust the data length to account for how much data |
| * is actually on the wire. |
| * |
| * returns the adjusted data length |
| **/ |
| static int |
| lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba, |
| struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| struct scsi_cmnd *sc = lpfc_cmd->pCmd; |
| int fcpdl; |
| |
| fcpdl = scsi_bufflen(sc); |
| |
| /* Check if there is protection data on the wire */ |
| if (sc->sc_data_direction == DMA_FROM_DEVICE) { |
| /* Read check for protection data */ |
| if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT) |
| return fcpdl; |
| |
| } else { |
| /* Write check for protection data */ |
| if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP) |
| return fcpdl; |
| } |
| |
| /* |
| * If we are in DIF Type 1 mode every data block has a 8 byte |
| * DIF (trailer) attached to it. Must ajust FCP data length |
| * to account for the protection data. |
| */ |
| fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8; |
| |
| return fcpdl; |
| } |
| |
| /** |
| * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec |
| * @phba: The Hba for which this call is being executed. |
| * @lpfc_cmd: The scsi buffer which is going to be prep'ed. |
| * |
| * 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_s3(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 fcpdl; |
| |
| /* |
| * 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; |
| |
| /* First check if data segment count from SCSI Layer is good */ |
| if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) |
| goto err; |
| |
| prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); |
| |
| switch (prot_group_type) { |
| case LPFC_PG_TYPE_NO_DIF: |
| |
| /* Here we need to add a PDE5 and PDE6 to the count */ |
| if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) |
| goto err; |
| |
| num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, |
| datasegcnt); |
| /* we should 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; |
| |
| /* |
| * There is a minimun of 4 BPLs used for every |
| * protection data segment. |
| */ |
| if ((lpfc_cmd->prot_seg_cnt * 4) > |
| (phba->cfg_total_seg_cnt - 2)) |
| goto err; |
| |
| num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, |
| datasegcnt, protsegcnt); |
| /* we should have 3 or more entries in buffer list */ |
| if ((num_bde < 3) || |
| (num_bde > phba->cfg_total_seg_cnt)) |
| goto err; |
| break; |
| |
| case LPFC_PG_TYPE_INVALID: |
| default: |
| scsi_dma_unmap(scsi_cmnd); |
| lpfc_cmd->seg_cnt = 0; |
| |
| 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 = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); |
| 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: |
| if (lpfc_cmd->seg_cnt) |
| scsi_dma_unmap(scsi_cmnd); |
| if (lpfc_cmd->prot_seg_cnt) |
| dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), |
| scsi_prot_sg_count(scsi_cmnd), |
| scsi_cmnd->sc_data_direction); |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9023 Cannot setup S/G List for HBA" |
| "IO segs %d/%d BPL %d SCSI %d: %d %d\n", |
| lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, |
| phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, |
| prot_group_type, num_bde); |
| |
| lpfc_cmd->seg_cnt = 0; |
| lpfc_cmd->prot_seg_cnt = 0; |
| return 1; |
| } |
| |
| /* |
| * This function calcuates the T10 DIF guard tag |
| * on the specified data using a CRC algorithmn |
| * using crc_t10dif. |
| */ |
| static uint16_t |
| lpfc_bg_crc(uint8_t *data, int count) |
| { |
| uint16_t crc = 0; |
| uint16_t x; |
| |
| crc = crc_t10dif(data, count); |
| x = cpu_to_be16(crc); |
| return x; |
| } |
| |
| /* |
| * This function calcuates the T10 DIF guard tag |
| * on the specified data using a CSUM algorithmn |
| * using ip_compute_csum. |
| */ |
| static uint16_t |
| lpfc_bg_csum(uint8_t *data, int count) |
| { |
| uint16_t ret; |
| |
| ret = ip_compute_csum(data, count); |
| return ret; |
| } |
| |
| /* |
| * This function examines the protection data to try to determine |
| * what type of T10-DIF error occurred. |
| */ |
| static void |
| lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| struct scatterlist *sgpe; /* s/g prot entry */ |
| struct scatterlist *sgde; /* s/g data entry */ |
| struct scsi_cmnd *cmd = lpfc_cmd->pCmd; |
| struct scsi_dif_tuple *src = NULL; |
| uint8_t *data_src = NULL; |
| uint16_t guard_tag, guard_type; |
| uint16_t start_app_tag, app_tag; |
| uint32_t start_ref_tag, ref_tag; |
| int prot, protsegcnt; |
| int err_type, len, data_len; |
| int chk_ref, chk_app, chk_guard; |
| uint16_t sum; |
| unsigned blksize; |
| |
| err_type = BGS_GUARD_ERR_MASK; |
| sum = 0; |
| guard_tag = 0; |
| |
| /* First check to see if there is protection data to examine */ |
| prot = scsi_get_prot_op(cmd); |
| if ((prot == SCSI_PROT_READ_STRIP) || |
| (prot == SCSI_PROT_WRITE_INSERT) || |
| (prot == SCSI_PROT_NORMAL)) |
| goto out; |
| |
| /* Currently the driver just supports ref_tag and guard_tag checking */ |
| chk_ref = 1; |
| chk_app = 0; |
| chk_guard = 0; |
| |
| /* Setup a ptr to the protection data provided by the SCSI host */ |
| sgpe = scsi_prot_sglist(cmd); |
| protsegcnt = lpfc_cmd->prot_seg_cnt; |
| |
| if (sgpe && protsegcnt) { |
| |
| /* |
| * We will only try to verify guard tag if the segment |
| * data length is a multiple of the blksize. |
| */ |
| sgde = scsi_sglist(cmd); |
| blksize = lpfc_cmd_blksize(cmd); |
| data_src = (uint8_t *)sg_virt(sgde); |
| data_len = sgde->length; |
| if ((data_len & (blksize - 1)) == 0) |
| chk_guard = 1; |
| guard_type = scsi_host_get_guard(cmd->device->host); |
| |
| src = (struct scsi_dif_tuple *)sg_virt(sgpe); |
| start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */ |
| start_app_tag = src->app_tag; |
| len = sgpe->length; |
| while (src && protsegcnt) { |
| while (len) { |
| |
| /* |
| * First check to see if a protection data |
| * check is valid |
| */ |
| if ((src->ref_tag == 0xffffffff) || |
| (src->app_tag == 0xffff)) { |
| start_ref_tag++; |
| goto skipit; |
| } |
| |
| /* First Guard Tag checking */ |
| if (chk_guard) { |
| guard_tag = src->guard_tag; |
| if (lpfc_cmd_guard_csum(cmd)) |
| sum = lpfc_bg_csum(data_src, |
| blksize); |
| else |
| sum = lpfc_bg_crc(data_src, |
| blksize); |
| if ((guard_tag != sum)) { |
| err_type = BGS_GUARD_ERR_MASK; |
| goto out; |
| } |
| } |
| |
| /* Reference Tag checking */ |
| ref_tag = be32_to_cpu(src->ref_tag); |
| if (chk_ref && (ref_tag != start_ref_tag)) { |
| err_type = BGS_REFTAG_ERR_MASK; |
| goto out; |
| } |
| start_ref_tag++; |
| |
| /* App Tag checking */ |
| app_tag = src->app_tag; |
| if (chk_app && (app_tag != start_app_tag)) { |
| err_type = BGS_APPTAG_ERR_MASK; |
| goto out; |
| } |
| skipit: |
| len -= sizeof(struct scsi_dif_tuple); |
| if (len < 0) |
| len = 0; |
| src++; |
| |
| data_src += blksize; |
| data_len -= blksize; |
| |
| /* |
| * Are we at the end of the Data segment? |
| * The data segment is only used for Guard |
| * tag checking. |
| */ |
| if (chk_guard && (data_len == 0)) { |
| chk_guard = 0; |
| sgde = sg_next(sgde); |
| if (!sgde) |
| goto out; |
| |
| data_src = (uint8_t *)sg_virt(sgde); |
| data_len = sgde->length; |
| if ((data_len & (blksize - 1)) == 0) |
| chk_guard = 1; |
| } |
| } |
| |
| /* Goto the next Protection data segment */ |
| sgpe = sg_next(sgpe); |
| if (sgpe) { |
| src = (struct scsi_dif_tuple *)sg_virt(sgpe); |
| len = sgpe->length; |
| } else { |
| src = NULL; |
| } |
| protsegcnt--; |
| } |
| } |
| out: |
| if (err_type == BGS_GUARD_ERR_MASK) { |
| 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++; |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n", |
| (unsigned long)scsi_get_lba(cmd), |
| sum, guard_tag); |
| |
| } else if (err_type == BGS_REFTAG_ERR_MASK) { |
| 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++; |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n", |
| (unsigned long)scsi_get_lba(cmd), |
| ref_tag, start_ref_tag); |
| |
| } else if (err_type == BGS_APPTAG_ERR_MASK) { |
| 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++; |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9041 BLKGRD: LBA %lx app_tag error %x != %x\n", |
| (unsigned long)scsi_get_lba(cmd), |
| app_tag, start_app_tag); |
| } |
| } |
| |
| |
| /* |
| * 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; |
| |
| spin_lock(&_dump_buf_lock); |
| if (!_dump_buf_done) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9070 BLKGRD: Saving" |
| " Data for %u blocks to debugfs\n", |
| (cmd->cmnd[7] << 8 | cmd->cmnd[8])); |
| lpfc_debug_save_data(phba, cmd); |
| |
| /* If we have a prot sgl, save the DIF buffer */ |
| if (lpfc_prot_group_type(phba, cmd) == |
| LPFC_PG_TYPE_DIF_BUF) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: " |
| "Saving DIF for %u blocks to debugfs\n", |
| (cmd->cmnd[7] << 8 | cmd->cmnd[8])); |
| lpfc_debug_save_dif(phba, cmd); |
| } |
| |
| _dump_buf_done = 1; |
| } |
| spin_unlock(&_dump_buf_lock); |
| |
| if (lpfc_bgs_get_invalid_prof(bgstat)) { |
| cmd->result = ScsiResult(DID_ERROR, 0); |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9072 BLKGRD: Invalid BG Profile in cmd" |
| " 0x%x lba 0x%llx blk cnt 0x%x " |
| "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], |
| (unsigned long long)scsi_get_lba(cmd), |
| blk_rq_sectors(cmd->request), bgstat, bghm); |
| ret = (-1); |
| goto out; |
| } |
| |
| if (lpfc_bgs_get_uninit_dif_block(bgstat)) { |
| cmd->result = ScsiResult(DID_ERROR, 0); |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9073 BLKGRD: Invalid BG PDIF Block in cmd" |
| " 0x%x lba 0x%llx blk cnt 0x%x " |
| "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], |
| (unsigned long long)scsi_get_lba(cmd), |
| blk_rq_sectors(cmd->request), bgstat, bghm); |
| 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++; |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9055 BLKGRD: Guard Tag error in cmd" |
| " 0x%x lba 0x%llx blk cnt 0x%x " |
| "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], |
| (unsigned long long)scsi_get_lba(cmd), |
| blk_rq_sectors(cmd->request), bgstat, bghm); |
| } |
| |
| 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++; |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9056 BLKGRD: Ref Tag error in cmd" |
| " 0x%x lba 0x%llx blk cnt 0x%x " |
| "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], |
| (unsigned long long)scsi_get_lba(cmd), |
| blk_rq_sectors(cmd->request), bgstat, bghm); |
| } |
| |
| 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++; |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9061 BLKGRD: App Tag error in cmd" |
| " 0x%x lba 0x%llx blk cnt 0x%x " |
| "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], |
| (unsigned long long)scsi_get_lba(cmd), |
| blk_rq_sectors(cmd->request), bgstat, bghm); |
| } |
| |
| 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. |
| * This code assumes there was also a guard/app/ref tag error |
| * indication. |
| */ |
| cmd->sense_buffer[7] = 0xc; /* Additional sense length */ |
| cmd->sense_buffer[8] = 0; /* Information descriptor type */ |
| cmd->sense_buffer[9] = 0xa; /* Additional descriptor length */ |
| cmd->sense_buffer[10] = 0x80; /* Validity bit */ |
| |
| /* bghm is a "on the wire" FC frame based count */ |
| switch (scsi_get_prot_op(cmd)) { |
| case SCSI_PROT_READ_INSERT: |
| case SCSI_PROT_WRITE_STRIP: |
| bghm /= cmd->device->sector_size; |
| break; |
| case SCSI_PROT_READ_STRIP: |
| case SCSI_PROT_WRITE_INSERT: |
| case SCSI_PROT_READ_PASS: |
| case SCSI_PROT_WRITE_PASS: |
| bghm /= (cmd->device->sector_size + |
| sizeof(struct scsi_dif_tuple)); |
| break; |
| } |
| |
| failing_sector = scsi_get_lba(cmd); |
| failing_sector += bghm; |
| |
| /* Descriptor Information */ |
| put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]); |
| } |
| |
| if (!ret) { |
| /* No error was reported - problem in FW? */ |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG, |
| "9057 BLKGRD: Unknown error in cmd" |
| " 0x%x lba 0x%llx blk cnt 0x%x " |
| "bgstat=x%x bghm=x%x\n", cmd->cmnd[0], |
| (unsigned long long)scsi_get_lba(cmd), |
| blk_rq_sectors(cmd->request), bgstat, bghm); |
| |
| /* Calcuate what type of error it was */ |
| lpfc_calc_bg_err(phba, lpfc_cmd); |
| } |
| out: |
| return ret; |
| } |
| |
| /** |
| * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec |
| * @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 for device with SLI-4 interface spec. |
| * |
| * Return codes: |
| * 1 - Error |
| * 0 - Success |
| **/ |
| static int |
| lpfc_scsi_prep_dma_buf_s4(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 sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl; |
| struct sli4_sge *first_data_sgl; |
| IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; |
| dma_addr_t physaddr; |
| uint32_t num_bde = 0; |
| uint32_t dma_len; |
| uint32_t dma_offset = 0; |
| int nseg; |
| struct ulp_bde64 *bde; |
| |
| /* |
| * 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)) { |
| /* |
| * 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 = scsi_dma_map(scsi_cmnd); |
| if (unlikely(!nseg)) |
| return 1; |
| sgl += 1; |
| /* clear the last flag in the fcp_rsp map entry */ |
| sgl->word2 = le32_to_cpu(sgl->word2); |
| bf_set(lpfc_sli4_sge_last, sgl, 0); |
| sgl->word2 = cpu_to_le32(sgl->word2); |
| sgl += 1; |
| first_data_sgl = sgl; |
| lpfc_cmd->seg_cnt = nseg; |
| if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:" |
| " %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); |
| lpfc_cmd->seg_cnt = 0; |
| 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 sge'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); |
| dma_len = sg_dma_len(sgel); |
| sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr)); |
| sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr)); |
| sgl->word2 = le32_to_cpu(sgl->word2); |
| if ((num_bde + 1) == nseg) |
| bf_set(lpfc_sli4_sge_last, sgl, 1); |
| else |
| bf_set(lpfc_sli4_sge_last, sgl, 0); |
| bf_set(lpfc_sli4_sge_offset, sgl, dma_offset); |
| bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA); |
| sgl->word2 = cpu_to_le32(sgl->word2); |
| sgl->sge_len = cpu_to_le32(dma_len); |
| dma_offset += dma_len; |
| sgl++; |
| } |
| /* setup the performance hint (first data BDE) if enabled */ |
| if (phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) { |
| bde = (struct ulp_bde64 *) |
| &(iocb_cmd->unsli3.sli3Words[5]); |
| bde->addrLow = first_data_sgl->addr_lo; |
| bde->addrHigh = first_data_sgl->addr_hi; |
| bde->tus.f.bdeSize = |
| le32_to_cpu(first_data_sgl->sge_len); |
| bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; |
| bde->tus.w = cpu_to_le32(bde->tus.w); |
| } |
| } else { |
| sgl += 1; |
| /* clear the last flag in the fcp_rsp map entry */ |
| sgl->word2 = le32_to_cpu(sgl->word2); |
| bf_set(lpfc_sli4_sge_last, sgl, 1); |
| sgl->word2 = cpu_to_le32(sgl->word2); |
| } |
| |
| /* |
| * Finish initializing those IOCB fields that are dependent on the |
| * scsi_cmnd request_buffer. Note that for SLI-2 the bdeSize is |
| * explicitly reinitialized. |
| * all iocb memory resources are reused. |
| */ |
| 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); |
| |
| /* |
| * If the OAS driver feature is enabled and the lun is enabled for |
| * OAS, set the oas iocb related flags. |
| */ |
| if ((phba->cfg_fof) && ((struct lpfc_device_data *) |
| scsi_cmnd->device->hostdata)->oas_enabled) |
| lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF); |
| return 0; |
| } |
| |
| /** |
| * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec |
| * @phba: The Hba for which this call is being executed. |
| * @lpfc_cmd: The scsi buffer which is going to be mapped. |
| * |
| * 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_s4(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 sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->fcp_bpl); |
| IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; |
| uint32_t num_sge = 0; |
| int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; |
| int prot_group_type = 0; |
| int fcpdl; |
| |
| /* |
| * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd |
| * fcp_rsp regions to the first data sge entry |
| */ |
| 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; |
| |
| sgl += 1; |
| /* clear the last flag in the fcp_rsp map entry */ |
| sgl->word2 = le32_to_cpu(sgl->word2); |
| bf_set(lpfc_sli4_sge_last, sgl, 0); |
| sgl->word2 = cpu_to_le32(sgl->word2); |
| |
| sgl += 1; |
| lpfc_cmd->seg_cnt = datasegcnt; |
| |
| /* First check if data segment count from SCSI Layer is good */ |
| if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) |
| goto err; |
| |
| prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); |
| |
| switch (prot_group_type) { |
| case LPFC_PG_TYPE_NO_DIF: |
| /* Here we need to add a DISEED to the count */ |
| if ((lpfc_cmd->seg_cnt + 1) > phba->cfg_total_seg_cnt) |
| goto err; |
| |
| num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl, |
| datasegcnt); |
| |
| /* we should have 2 or more entries in buffer list */ |
| if (num_sge < 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; |
| /* |
| * There is a minimun of 3 SGEs used for every |
| * protection data segment. |
| */ |
| if ((lpfc_cmd->prot_seg_cnt * 3) > |
| (phba->cfg_total_seg_cnt - 2)) |
| goto err; |
| |
| num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl, |
| datasegcnt, protsegcnt); |
| |
| /* we should have 3 or more entries in buffer list */ |
| if ((num_sge < 3) || |
| (num_sge > phba->cfg_total_seg_cnt)) |
| goto err; |
| break; |
| |
| case LPFC_PG_TYPE_INVALID: |
| default: |
| scsi_dma_unmap(scsi_cmnd); |
| lpfc_cmd->seg_cnt = 0; |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9083 Unexpected protection group %i\n", |
| prot_group_type); |
| return 1; |
| } |
| } |
| |
| switch (scsi_get_prot_op(scsi_cmnd)) { |
| case SCSI_PROT_WRITE_STRIP: |
| case SCSI_PROT_READ_STRIP: |
| lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_STRIP; |
| break; |
| case SCSI_PROT_WRITE_INSERT: |
| case SCSI_PROT_READ_INSERT: |
| lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_INSERT; |
| break; |
| case SCSI_PROT_WRITE_PASS: |
| case SCSI_PROT_READ_PASS: |
| lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_DIF_PASS; |
| break; |
| } |
| |
| fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd); |
| 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; |
| |
| /* |
| * If the OAS driver feature is enabled and the lun is enabled for |
| * OAS, set the oas iocb related flags. |
| */ |
| if ((phba->cfg_fof) && ((struct lpfc_device_data *) |
| scsi_cmnd->device->hostdata)->oas_enabled) |
| lpfc_cmd->cur_iocbq.iocb_flag |= (LPFC_IO_OAS | LPFC_IO_FOF); |
| |
| return 0; |
| err: |
| if (lpfc_cmd->seg_cnt) |
| scsi_dma_unmap(scsi_cmnd); |
| if (lpfc_cmd->prot_seg_cnt) |
| dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd), |
| scsi_prot_sg_count(scsi_cmnd), |
| scsi_cmnd->sc_data_direction); |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "9084 Cannot setup S/G List for HBA" |
| "IO segs %d/%d SGL %d SCSI %d: %d %d\n", |
| lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt, |
| phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt, |
| prot_group_type, num_sge); |
| |
| lpfc_cmd->seg_cnt = 0; |
| lpfc_cmd->prot_seg_cnt = 0; |
| return 1; |
| } |
| |
| /** |
| * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of 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 wraps the actual DMA mapping function pointer from the |
| * lpfc_hba struct. |
| * |
| * Return codes: |
| * 1 - Error |
| * 0 - Success |
| **/ |
| static inline int |
| lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); |
| } |
| |
| /** |
| * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer |
| * using BlockGuard. |
| * @phba: The Hba for which this call is being executed. |
| * @lpfc_cmd: The scsi buffer which is going to be mapped. |
| * |
| * This routine wraps the actual DMA mapping function pointer from the |
| * lpfc_hba struct. |
| * |
| * Return codes: |
| * 1 - Error |
| * 0 - Success |
| **/ |
| static inline int |
| lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); |
| } |
| |
| /** |
| * 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 (!pnode || !NLP_CHK_NODE_ACT(pnode)) |
| return; |
| |
| /* 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 - Un-map DMA mapping of SG-list for dev |
| * @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 for device with SLI-3 interface spec. |
| **/ |
| 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 & RSP_LEN_VALID) { |
| rsplen = be32_to_cpu(fcprsp->rspRspLen); |
| if (rsplen != 0 && rsplen != 4 && rsplen != 8) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "2719 Invalid response length: " |
| "tgt x%x lun x%llx cmnd x%x rsplen x%x\n", |
| cmnd->device->id, |
| cmnd->device->lun, cmnd->cmnd[0], |
| rsplen); |
| host_status = DID_ERROR; |
| goto out; |
| } |
| if (fcprsp->rspInfo3 != RSP_NO_FAILURE) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "2757 Protocol failure detected during " |
| "processing of FCP I/O op: " |
| "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n", |
| cmnd->device->id, |
| cmnd->device->lun, cmnd->cmnd[0], |
| fcprsp->rspInfo3); |
| host_status = DID_ERROR; |
| 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; |
| |
| /* special handling for under run conditions */ |
| if (!scsi_status && (resp_info & RESID_UNDER)) { |
| /* don't log under runs if fcp set... */ |
| if (vport->cfg_log_verbose & LOG_FCP) |
| logit = LOG_FCP_ERROR; |
| /* unless operator says so */ |
| if (vport->cfg_log_verbose & LOG_FCP_UNDER) |
| logit = LOG_FCP_UNDER; |
| } |
| |
| 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); |
| |
| 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_UNDER, |
| "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 transferred 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 (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 x%x\n", |
| be32_to_cpu(fcpcmd->fcpDl), |
| be32_to_cpu(fcprsp->rspResId), |
| fcpi_parm, cmnd->cmnd[0], scsi_status); |
| switch (scsi_status) { |
| case SAM_STAT_GOOD: |
| case SAM_STAT_CHECK_CONDITION: |
| /* Fabric dropped a data frame. Fail any successful |
| * command in which we detected dropped frames. |
| * A status of good or some check conditions could |
| * be considered a successful command. |
| */ |
| host_status = DID_ERROR; |
| break; |
| } |
| 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; |
| int result; |
| int depth; |
| unsigned long flags; |
| struct lpfc_fast_path_event *fast_path_evt; |
| struct Scsi_Host *shost; |
| uint32_t queue_depth, scsi_id; |
| uint32_t logit = LOG_FCP; |
| |
| /* Sanity check on return of outstanding command */ |
| if (!(lpfc_cmd->pCmd)) |
| return; |
| cmd = lpfc_cmd->pCmd; |
| shost = cmd->device->host; |
| |
| lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK); |
| lpfc_cmd->status = pIocbOut->iocb.ulpStatus; |
| /* pick up SLI4 exhange busy status from HBA */ |
| lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY; |
| |
| #ifdef CONFIG_SCSI_LPFC_DEBUG_FS |
| if (lpfc_cmd->prot_data_type) { |
| struct scsi_dif_tuple *src = NULL; |
| |
| src = (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment; |
| /* |
| * Used to restore any changes to protection |
| * data for error injection. |
| */ |
| switch (lpfc_cmd->prot_data_type) { |
| case LPFC_INJERR_REFTAG: |
| src->ref_tag = |
| lpfc_cmd->prot_data; |
| break; |
| case LPFC_INJERR_APPTAG: |
| src->app_tag = |
| (uint16_t)lpfc_cmd->prot_data; |
| break; |
| case LPFC_INJERR_GUARD: |
| src->guard_tag = |
| (uint16_t)lpfc_cmd->prot_data; |
| break; |
| default: |
| break; |
| } |
| |
| lpfc_cmd->prot_data = 0; |
| lpfc_cmd->prot_data_type = 0; |
| lpfc_cmd->prot_data_segment = NULL; |
| } |
| #endif |
| 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; |
| if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR && |
| !lpfc_cmd->fcp_rsp->rspStatus3 && |
| (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) && |
| !(vport->cfg_log_verbose & LOG_FCP_UNDER)) |
| logit = 0; |
| else |
| logit = LOG_FCP | LOG_FCP_UNDER; |
| lpfc_printf_vlog(vport, KERN_WARNING, logit, |
| "9030 FCP cmd x%x failed <%d/%lld> " |
| "status: x%x result: x%x " |
| "sid: x%x did: x%x oxid: 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, |
| vport->fc_myDID, |
| (pnode) ? pnode->nlp_DID : 0, |
| phba->sli_rev == LPFC_SLI_REV4 ? |
| lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, |
| 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: |
| case IOSTAT_REMOTE_STOP: |
| if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR || |
| lpfc_cmd->result == |
| IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR || |
| lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR || |
| lpfc_cmd->result == |
| IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) { |
| cmd->result = ScsiResult(DID_NO_CONNECT, 0); |
| break; |
| } |
| if (lpfc_cmd->result == IOERR_INVALID_RPI || |
| lpfc_cmd->result == IOERR_NO_RESOURCES || |
| lpfc_cmd->result == IOERR_ABORT_REQUESTED || |
| lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) { |
| 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\n"); |
| } |
| } |
| if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP) |
| && (phba->sli_rev == LPFC_SLI_REV4) |
| && (pnode && NLP_CHK_NODE_ACT(pnode))) { |
| /* This IO was aborted by the target, we don't |
| * know the rxid and because we did not send the |
| * ABTS we cannot generate and RRQ. |
| */ |
| lpfc_set_rrq_active(phba, pnode, |
| lpfc_cmd->cur_iocbq.sli4_lxritag, |
| 0, 0); |
| } |
| /* 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/%llu> 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 < vport->cfg_tgt_queue_depth) && |
| time_after(jiffies, pnode->last_change_time + |
| msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { |
| spin_lock_irqsave(shost->host_lock, flags); |
| depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT |
| / 100; |
| depth = depth ? depth : 1; |
| pnode->cmd_qdepth += depth; |
| if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth) |
| pnode->cmd_qdepth = vport->cfg_tgt_queue_depth; |
| 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) { |
| spin_lock_irqsave(&phba->hbalock, flags); |
| lpfc_cmd->pCmd = NULL; |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| |
| /* |
| * If there is a thread waiting for command completion |
| * wake up the thread. |
| */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (lpfc_cmd->waitq) |
| wake_up(lpfc_cmd->waitq); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| return; |
| } |
| |
| spin_lock_irqsave(&phba->hbalock, flags); |
| lpfc_cmd->pCmd = NULL; |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| |
| /* |
| * If there is a thread waiting for command completion |
| * wake up the thread. |
| */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| 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 - Wrapper func for convert scsi cmnd to FCP info 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 for device with SLI3 interface spec. |
| **/ |
| 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; |
| uint8_t *ptr; |
| bool sli4; |
| uint32_t fcpdl; |
| |
| 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); |
| |
| ptr = &fcp_cmnd->fcpCdb[0]; |
| memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); |
| if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) { |
| ptr += scsi_cmnd->cmd_len; |
| memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len)); |
| } |
| |
| fcp_cmnd->fcpCntl1 = SIMPLE_Q; |
| |
| sli4 = (phba->sli_rev == LPFC_SLI_REV4); |
| piocbq->iocb.un.fcpi.fcpi_XRdy = 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->ulpPU = PARM_READ_CHECK; |
| if (vport->cfg_first_burst_size && |
| (pnode->nlp_flag & NLP_FIRSTBURST)) { |
| fcpdl = scsi_bufflen(scsi_cmnd); |
| if (fcpdl < vport->cfg_first_burst_size) |
| piocbq->iocb.un.fcpi.fcpi_XRdy = fcpdl; |
| else |
| piocbq->iocb.un.fcpi.fcpi_XRdy = |
| vport->cfg_first_burst_size; |
| } |
| 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 (sli4) |
| piocbq->iocb.ulpContext = |
| phba->sli4_hba.rpi_ids[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_cmd - Convert SLI3 scsi TM cmd to FCP info 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 |
| * for device with SLI-3 interface spec. |
| * |
| * Return codes: |
| * 0 - Error |
| * 1 - Success |
| **/ |
| static int |
| lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, |
| struct lpfc_scsi_buf *lpfc_cmd, |
| uint64_t 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 (vport->phba->sli_rev == LPFC_SLI_REV4) { |
| piocb->ulpContext = |
| vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]; |
| } |
| piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0; |
| piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); |
| piocb->ulpPU = 0; |
| piocb->un.fcpi.fcpi_parm = 0; |
| |
| /* 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; |
| |
| if (vport->phba->sli_rev == LPFC_SLI_REV4) |
| lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd); |
| |
| return 1; |
| } |
| |
| /** |
| * lpfc_scsi_api_table_setup - Set up scsi api function jump table |
| * @phba: The hba struct for which this call is being executed. |
| * @dev_grp: The HBA PCI-Device group number. |
| * |
| * This routine sets up the SCSI interface API function jump table in @phba |
| * struct. |
| * Returns: 0 - success, -ENODEV - failure. |
| **/ |
| int |
| lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp) |
| { |
| |
| phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf; |
| phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd; |
| |
| switch (dev_grp) { |
| case LPFC_PCI_DEV_LP: |
| phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3; |
| phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3; |
| phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3; |
| phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3; |
| phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3; |
| break; |
| case LPFC_PCI_DEV_OC: |
| phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4; |
| phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4; |
| phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4; |
| phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4; |
| phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4; |
| break; |
| default: |
| lpfc_printf_log(phba, KERN_ERR, LOG_INIT, |
| "1418 Invalid HBA PCI-device group: 0x%x\n", |
| dev_grp); |
| return -ENODEV; |
| break; |
| } |
| phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth; |
| phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; |
| return 0; |
| } |
| |
| /** |
| * 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_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, link_speed = 0; |
| 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); |
| } |
| len = strlen(lpfcinfobuf); |
| if (phba->sli_rev <= LPFC_SLI_REV3) { |
| link_speed = lpfc_sli_port_speed_get(phba); |
| } else { |
| if (phba->sli4_hba.link_state.logical_speed) |
| link_speed = |
| phba->sli4_hba.link_state.logical_speed; |
| else |
| link_speed = phba->sli4_hba.link_state.speed; |
| } |
| if (link_speed != 0) |
| snprintf(lpfcinfobuf + len, 384-len, |
| " Logical Link Speed: %d Mbps", link_speed); |
| } |
| 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 (!list_empty(&phba->sli.ring[LPFC_FCP_RING].txcmplq)) |
| 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_handle_fast_ring_event(phba, |
| &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); |
| |
| 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_Host *shost, struct scsi_cmnd *cmnd) |
| { |
| struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_rport_data *rdata; |
| struct lpfc_nodelist *ndlp; |
| struct lpfc_scsi_buf *lpfc_cmd; |
| struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| int err; |
| |
| rdata = lpfc_rport_data_from_scsi_device(cmnd->device); |
| err = fc_remote_port_chkready(rport); |
| if (err) { |
| cmnd->result = err; |
| goto out_fail_command; |
| } |
| ndlp = rdata->pnode; |
| |
| if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) && |
| (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) { |
| |
| lpfc_printf_log(phba, KERN_ERR, LOG_BG, |
| "9058 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)) |
| goto out_tgt_busy; |
| if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) |
| goto out_tgt_busy; |
| |
| lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp); |
| 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; |
| |
| if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { |
| if (vport->phba->cfg_enable_bg) { |
| lpfc_printf_vlog(vport, |
| KERN_INFO, LOG_SCSI_CMD, |
| "9033 BLKGRD: rcvd %s cmd:x%x " |
| "sector x%llx cnt %u pt %x\n", |
| dif_op_str[scsi_get_prot_op(cmnd)], |
| cmnd->cmnd[0], |
| (unsigned long long)scsi_get_lba(cmnd), |
| blk_rq_sectors(cmnd->request), |
| (cmnd->cmnd[1]>>5)); |
| } |
| err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); |
| } else { |
| if (vport->phba->cfg_enable_bg) { |
| lpfc_printf_vlog(vport, |
| KERN_INFO, LOG_SCSI_CMD, |
| "9038 BLKGRD: rcvd PROT_NORMAL cmd: " |
| "x%x sector x%llx cnt %u pt %x\n", |
| cmnd->cmnd[0], |
| (unsigned long long)scsi_get_lba(cmnd), |
| blk_rq_sectors(cmnd->request), |
| (cmnd->cmnd[1]>>5)); |
| } |
| 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, LPFC_FCP_RING, |
| &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); |
| if (err) { |
| atomic_dec(&ndlp->cmd_pending); |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "3376 FCP could not issue IOCB err %x" |
| "FCP cmd x%x <%d/%llu> " |
| "sid: x%x did: x%x oxid: x%x " |
| "Data: x%x x%x x%x x%x\n", |
| err, cmnd->cmnd[0], |
| cmnd->device ? cmnd->device->id : 0xffff, |
| cmnd->device ? cmnd->device->lun : (u64) -1, |
| vport->fc_myDID, ndlp->nlp_DID, |
| phba->sli_rev == LPFC_SLI_REV4 ? |
| lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff, |
| lpfc_cmd->cur_iocbq.iocb.ulpContext, |
| lpfc_cmd->cur_iocbq.iocb.ulpIoTag, |
| lpfc_cmd->cur_iocbq.iocb.ulpTimeout, |
| (uint32_t) |
| (cmnd->request->timeout / 1000)); |
| |
| |
| goto out_host_busy_free_buf; |
| } |
| if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { |
| lpfc_sli_handle_fast_ring_event(phba, |
| &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); |
| |
| 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_tgt_busy: |
| return SCSI_MLQUEUE_TARGET_BUSY; |
| |
| out_fail_command: |
| cmnd->scsi_done(cmnd); |
| return 0; |
| } |
| |
| |
| /** |
| * 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_iocbq *iocb; |
| struct lpfc_iocbq *abtsiocb; |
| struct lpfc_scsi_buf *lpfc_cmd; |
| IOCB_t *cmd, *icmd; |
| int ret = SUCCESS, status = 0; |
| struct lpfc_sli_ring *pring_s4; |
| int ring_number, ret_val; |
| unsigned long flags, iflags; |
| DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq); |
| |
| status = fc_block_scsi_eh(cmnd); |
| if (status != 0 && status != SUCCESS) |
| return status; |
| |
| spin_lock_irqsave(&phba->hbalock, flags); |
| /* driver queued commands are in process of being flushed */ |
| if (phba->hba_flag & HBA_FCP_IOQ_FLUSH) { |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "3168 SCSI Layer abort requested I/O has been " |
| "flushed by LLD.\n"); |
| return FAILED; |
| } |
| |
| lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; |
| if (!lpfc_cmd || !lpfc_cmd->pCmd) { |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "2873 SCSI Layer I/O Abort Request IO CMPL Status " |
| "x%x ID %d LUN %llu\n", |
| SUCCESS, cmnd->device->id, cmnd->device->lun); |
| return SUCCESS; |
| } |
| |
| iocb = &lpfc_cmd->cur_iocbq; |
| /* the command is in process of being cancelled */ |
| if (!(iocb->iocb_flag & LPFC_IO_ON_TXCMPLQ)) { |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "3169 SCSI Layer abort requested I/O has been " |
| "cancelled by LLD.\n"); |
| return FAILED; |
| } |
| /* |
| * 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. |
| */ |
| if (lpfc_cmd->pCmd != cmnd) { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "3170 SCSI Layer abort requested I/O has been " |
| "completed by LLD.\n"); |
| goto out_unlock; |
| } |
| |
| BUG_ON(iocb->context1 != lpfc_cmd); |
| |
| /* abort issued in recovery is still in progress */ |
| if (iocb->iocb_flag & LPFC_DRIVER_ABORTED) { |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "3389 SCSI Layer I/O Abort Request is pending\n"); |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| goto wait_for_cmpl; |
| } |
| |
| abtsiocb = __lpfc_sli_get_iocbq(phba); |
| if (abtsiocb == NULL) { |
| ret = FAILED; |
| goto out_unlock; |
| } |
| |
| /* Indicate the IO is being aborted by the driver. */ |
| iocb->iocb_flag |= LPFC_DRIVER_ABORTED; |
| |
| /* |
| * 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; |
| if (phba->sli_rev == LPFC_SLI_REV4) |
| icmd->un.acxri.abortIoTag = iocb->sli4_xritag; |
| else |
| icmd->un.acxri.abortIoTag = cmd->ulpIoTag; |
| |
| icmd->ulpLe = 1; |
| icmd->ulpClass = cmd->ulpClass; |
| |
| /* ABTS WQE must go to the same WQ as the WQE to be aborted */ |
| abtsiocb->fcp_wqidx = iocb->fcp_wqidx; |
| abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX; |
| if (iocb->iocb_flag & LPFC_IO_FOF) |
| abtsiocb->iocb_flag |= LPFC_IO_FOF; |
| |
| 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 (phba->sli_rev == LPFC_SLI_REV4) { |
| ring_number = MAX_SLI3_CONFIGURED_RINGS + iocb->fcp_wqidx; |
| pring_s4 = &phba->sli.ring[ring_number]; |
| /* Note: both hbalock and ring_lock must be set here */ |
| spin_lock_irqsave(&pring_s4->ring_lock, iflags); |
| ret_val = __lpfc_sli_issue_iocb(phba, pring_s4->ringno, |
| abtsiocb, 0); |
| spin_unlock_irqrestore(&pring_s4->ring_lock, iflags); |
| } else { |
| ret_val = __lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, |
| abtsiocb, 0); |
| } |
| /* no longer need the lock after this point */ |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| |
| |
| if (ret_val == IOCB_ERROR) { |
| lpfc_sli_release_iocbq(phba, abtsiocb); |
| ret = FAILED; |
| goto out; |
| } |
| |
| if (phba->cfg_poll & DISABLE_FCP_RING_INT) |
| lpfc_sli_handle_fast_ring_event(phba, |
| &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); |
| |
| wait_for_cmpl: |
| lpfc_cmd->waitq = &waitq; |
| /* Wait for abort to complete */ |
| wait_event_timeout(waitq, |
| (lpfc_cmd->pCmd != cmnd), |
| msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000)); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| lpfc_cmd->waitq = NULL; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (lpfc_cmd->pCmd == cmnd) { |
| ret = FAILED; |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0748 abort handler timed out waiting " |
| "for abortng I/O (xri:x%x) to complete: " |
| "ret %#x, ID %d, LUN %llu\n", |
| iocb->sli4_xritag, ret, |
| cmnd->device->id, cmnd->device->lun); |
| } |
| goto out; |
| |
| out_unlock: |
| spin_unlock_irqrestore(&phba->hbalock, flags); |
| out: |
| lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, |
| "0749 SCSI Layer I/O Abort Request Status x%x ID %d " |
| "LUN %llu\n", ret, cmnd->device->id, |
| cmnd->device->lun); |
| return ret; |
| } |
| |
| static char * |
| lpfc_taskmgmt_name(uint8_t task_mgmt_cmd) |
| { |
| switch (task_mgmt_cmd) { |
| case FCP_ABORT_TASK_SET: |
| return "ABORT_TASK_SET"; |
| case FCP_CLEAR_TASK_SET: |
| return "FCP_CLEAR_TASK_SET"; |
| case FCP_BUS_RESET: |
| return "FCP_BUS_RESET"; |
| case FCP_LUN_RESET: |
| return "FCP_LUN_RESET"; |
| case FCP_TARGET_RESET: |
| return "FCP_TARGET_RESET"; |
| case FCP_CLEAR_ACA: |
| return "FCP_CLEAR_ACA"; |
| case FCP_TERMINATE_TASK: |
| return "FCP_TERMINATE_TASK"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| |
| /** |
| * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed |
| * @vport: The virtual port for which this call is being executed. |
| * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. |
| * |
| * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded |
| * |
| * Return code : |
| * 0x2003 - Error |
| * 0x2002 - Success |
| **/ |
| static int |
| lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd) |
| { |
| struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; |
| uint32_t rsp_info; |
| uint32_t rsp_len; |
| uint8_t rsp_info_code; |
| int ret = FAILED; |
| |
| |
| if (fcprsp == NULL) |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0703 fcp_rsp is missing\n"); |
| else { |
| rsp_info = fcprsp->rspStatus2; |
| rsp_len = be32_to_cpu(fcprsp->rspRspLen); |
| rsp_info_code = fcprsp->rspInfo3; |
| |
| |
| lpfc_printf_vlog(vport, KERN_INFO, |
| LOG_FCP, |
| "0706 fcp_rsp valid 0x%x," |
| " rsp len=%d code 0x%x\n", |
| rsp_info, |
| rsp_len, rsp_info_code); |
| |
| if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) { |
| switch (rsp_info_code) { |
| case RSP_NO_FAILURE: |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0715 Task Mgmt No Failure\n"); |
| ret = SUCCESS; |
| break; |
| case RSP_TM_NOT_SUPPORTED: /* TM rejected */ |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0716 Task Mgmt Target " |
| "reject\n"); |
| break; |
| case RSP_TM_NOT_COMPLETED: /* TM failed */ |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0717 Task Mgmt Target " |
| "failed TM\n"); |
| break; |
| case RSP_TM_INVALID_LU: /* TM to invalid LU! */ |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0718 Task Mgmt to invalid " |
| "LUN\n"); |
| break; |
| } |
| } |
| } |
| return ret; |
| } |
| |
| |
| /** |
| * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler |
| * @vport: The virtual port for which this call is being executed. |
| * @rdata: Pointer to remote port local data |
| * @tgt_id: Target ID of remote device. |
| * @lun_id: Lun number for the TMF |
| * @task_mgmt_cmd: type of TMF to send |
| * |
| * This routine builds and sends a TMF (SCSI Task Mgmt Function) to |
| * a remote port. |
| * |
| * Return Code: |
| * 0x2003 - Error |
| * 0x2002 - Success. |
| **/ |
| static int |
| lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata, |
| unsigned tgt_id, uint64_t lun_id, |
| uint8_t task_mgmt_cmd) |
| { |
| struct lpfc_hba *phba = vport->phba; |
| struct lpfc_scsi_buf *lpfc_cmd; |
| struct lpfc_iocbq *iocbq; |
| struct lpfc_iocbq *iocbqrsp; |
| struct lpfc_nodelist *pnode = rdata->pnode; |
| int ret; |
| int status; |
| |
| if (!pnode || !NLP_CHK_NODE_ACT(pnode)) |
| return FAILED; |
| |
| lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode); |
| if (lpfc_cmd == NULL) |
| return FAILED; |
| lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo; |
| lpfc_cmd->rdata = rdata; |
| |
| status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id, |
| task_mgmt_cmd); |
| if (!status) { |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| return FAILED; |
| } |
| |
| iocbq = &lpfc_cmd->cur_iocbq; |
| iocbqrsp = lpfc_sli_get_iocbq(phba); |
| if (iocbqrsp == NULL) { |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| return FAILED; |
| } |
| iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; |
| |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0702 Issue %s to TGT %d LUN %llu " |
| "rpi x%x nlp_flag x%x Data: x%x x%x\n", |
| lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id, |
| pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag, |
| iocbq->iocb_flag); |
| |
| status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING, |
| iocbq, iocbqrsp, lpfc_cmd->timeout); |
| if ((status != IOCB_SUCCESS) || |
| (iocbqrsp->iocb.ulpStatus != IOSTAT_SUCCESS)) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0727 TMF %s to TGT %d LUN %llu failed (%d, %d) " |
| "iocb_flag x%x\n", |
| lpfc_taskmgmt_name(task_mgmt_cmd), |
| tgt_id, lun_id, iocbqrsp->iocb.ulpStatus, |
| iocbqrsp->iocb.un.ulpWord[4], |
| iocbq->iocb_flag); |
| /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */ |
| if (status == IOCB_SUCCESS) { |
| if (iocbqrsp->iocb.ulpStatus == IOSTAT_FCP_RSP_ERROR) |
| /* Something in the FCP_RSP was invalid. |
| * Check conditions */ |
| ret = lpfc_check_fcp_rsp(vport, lpfc_cmd); |
| else |
| ret = FAILED; |
| } else if (status == IOCB_TIMEDOUT) { |
| ret = TIMEOUT_ERROR; |
| } else { |
| ret = FAILED; |
| } |
| lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
| } else |
| ret = SUCCESS; |
| |
| lpfc_sli_release_iocbq(phba, iocbqrsp); |
| |
| if (ret != TIMEOUT_ERROR) |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| |
| return ret; |
| } |
| |
| /** |
| * lpfc_chk_tgt_mapped - |
| * @vport: The virtual port to check on |
| * @cmnd: Pointer to scsi_cmnd data structure. |
| * |
| * This routine delays until the scsi target (aka rport) for the |
| * command exists (is present and logged in) or we declare it non-existent. |
| * |
| * Return code : |
| * 0x2003 - Error |
| * 0x2002 - Success |
| **/ |
| static int |
| lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd) |
| { |
| struct lpfc_rport_data *rdata; |
| struct lpfc_nodelist *pnode; |
| unsigned long later; |
| |
| rdata = lpfc_rport_data_from_scsi_device(cmnd->device); |
| if (!rdata) { |
| lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, |
| "0797 Tgt Map rport failure: rdata x%p\n", rdata); |
| return FAILED; |
| } |
| pnode = rdata->pnode; |
| /* |
| * If target is not in a MAPPED state, delay 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) |
| return SUCCESS; |
| schedule_timeout_uninterruptible(msecs_to_jiffies(500)); |
| rdata = lpfc_rport_data_from_scsi_device(cmnd->device); |
| if (!rdata) |
| return FAILED; |
| pnode = rdata->pnode; |
| } |
| if (!pnode || !NLP_CHK_NODE_ACT(pnode) || |
| (pnode->nlp_state != NLP_STE_MAPPED_NODE)) |
| return FAILED; |
| return SUCCESS; |
| } |
| |
| /** |
| * lpfc_reset_flush_io_context - |
| * @vport: The virtual port (scsi_host) for the flush context |
| * @tgt_id: If aborting by Target contect - specifies the target id |
| * @lun_id: If aborting by Lun context - specifies the lun id |
| * @context: specifies the context level to flush at. |
| * |
| * After a reset condition via TMF, we need to flush orphaned i/o |
| * contexts from the adapter. This routine aborts any contexts |
| * outstanding, then waits for their completions. The wait is |
| * bounded by devloss_tmo though. |
| * |
| * Return code : |
| * 0x2003 - Error |
| * 0x2002 - Success |
| **/ |
| static int |
| lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id, |
| uint64_t lun_id, lpfc_ctx_cmd context) |
| { |
| struct lpfc_hba *phba = vport->phba; |
| unsigned long later; |
| int cnt; |
| |
| cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context); |
| if (cnt) |
| lpfc_sli_abort_taskmgmt(vport, |
| &phba->sli.ring[phba->sli.fcp_ring], |
| tgt_id, lun_id, context); |
| 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, tgt_id, lun_id, context); |
| } |
| if (cnt) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0724 I/O flush failure for context %s : cnt x%x\n", |
| ((context == LPFC_CTX_LUN) ? "LUN" : |
| ((context == LPFC_CTX_TGT) ? "TGT" : |
| ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))), |
| cnt); |
| return FAILED; |
| } |
| return SUCCESS; |
| } |
| |
| /** |
| * 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 LUN_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_rport_data *rdata; |
| struct lpfc_nodelist *pnode; |
| unsigned tgt_id = cmnd->device->id; |
| uint64_t lun_id = cmnd->device->lun; |
| struct lpfc_scsi_event_header scsi_event; |
| int status; |
| |
| rdata = lpfc_rport_data_from_scsi_device(cmnd->device); |
| if (!rdata) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0798 Device Reset rport failure: rdata x%p\n", rdata); |
| return FAILED; |
| } |
| pnode = rdata->pnode; |
| status = fc_block_scsi_eh(cmnd); |
| if (status != 0 && status != SUCCESS) |
| return status; |
| |
| status = lpfc_chk_tgt_mapped(vport, cmnd); |
| if (status == FAILED) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0721 Device Reset rport failure: rdata x%p\n", rdata); |
| return FAILED; |
| } |
| |
| scsi_event.event_type = FC_REG_SCSI_EVENT; |
| scsi_event.subcategory = LPFC_EVENT_LUNRESET; |
| scsi_event.lun = lun_id; |
| 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); |
| |
| status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, |
| FCP_LUN_RESET); |
| |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0713 SCSI layer issued Device Reset (%d, %llu) " |
| "return x%x\n", tgt_id, lun_id, status); |
| |
| /* |
| * We have to clean up i/o as : they may be orphaned by the TMF; |
| * or if the TMF failed, they may be in an indeterminate state. |
| * So, continue on. |
| * We will report success if all the i/o aborts successfully. |
| */ |
| if (status == SUCCESS) |
| status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, |
| LPFC_CTX_LUN); |
| |
| return status; |
| } |
| |
| /** |
| * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point |
| * @cmnd: Pointer to scsi_cmnd data structure. |
| * |
| * This routine does a target reset by sending a TARGET_RESET task management |
| * command. |
| * |
| * Return code : |
| * 0x2003 - Error |
| * 0x2002 - Success |
| **/ |
| static int |
| lpfc_target_reset_handler(struct scsi_cmnd *cmnd) |
| { |
| struct Scsi_Host *shost = cmnd->device->host; |
| struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata; |
| struct lpfc_rport_data *rdata; |
| struct lpfc_nodelist *pnode; |
| unsigned tgt_id = cmnd->device->id; |
| uint64_t lun_id = cmnd->device->lun; |
| struct lpfc_scsi_event_header scsi_event; |
| int status; |
| |
| rdata = lpfc_rport_data_from_scsi_device(cmnd->device); |
| if (!rdata) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0799 Target Reset rport failure: rdata x%p\n", rdata); |
| return FAILED; |
| } |
| pnode = rdata->pnode; |
| status = fc_block_scsi_eh(cmnd); |
| if (status != 0 && status != SUCCESS) |
| return status; |
| |
| status = lpfc_chk_tgt_mapped(vport, cmnd); |
| if (status == FAILED) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0722 Target Reset rport failure: rdata x%p\n", rdata); |
| spin_lock_irq(shost->host_lock); |
| pnode->nlp_flag &= ~NLP_NPR_ADISC; |
| pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE; |
| spin_unlock_irq(shost->host_lock); |
| lpfc_reset_flush_io_context(vport, tgt_id, lun_id, |
| LPFC_CTX_TGT); |
| return FAST_IO_FAIL; |
| } |
| |
| 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); |
| |
| status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id, |
| FCP_TARGET_RESET); |
| |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0723 SCSI layer issued Target Reset (%d, %llu) " |
| "return x%x\n", tgt_id, lun_id, status); |
| |
| /* |
| * We have to clean up i/o as : they may be orphaned by the TMF; |
| * or if the TMF failed, they may be in an indeterminate state. |
| * So, continue on. |
| * We will report success if all the i/o aborts successfully. |
| */ |
| if (status == SUCCESS) |
| status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id, |
| LPFC_CTX_TGT); |
| return status; |
| } |
| |
| /** |
| * 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 targets on @cmnd->device->host. |
| * This emulates Parallel SCSI Bus Reset Semantics. |
| * |
| * 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_nodelist *ndlp = NULL; |
| struct lpfc_scsi_event_header scsi_event; |
| int match; |
| int ret = SUCCESS, status, i; |
| |
| 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); |
| |
| status = fc_block_scsi_eh(cmnd); |
| if (status != 0 && status != SUCCESS) |
| return status; |
| |
| /* |
| * 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 (vport->phba->cfg_fcp2_no_tgt_reset && |
| (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE)) |
| 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; |
| |
| status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data, |
| i, 0, FCP_TARGET_RESET); |
| |
| if (status != SUCCESS) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0700 Bus Reset on target %d failed\n", |
| i); |
| ret = FAILED; |
| } |
| } |
| /* |
| * We have to clean up i/o as : they may be orphaned by the TMFs |
| * above; or if any of the TMFs failed, they may be in an |
| * indeterminate state. |
| * We will report success if all the i/o aborts successfully. |
| */ |
| |
| status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST); |
| if (status != SUCCESS) |
| ret = FAILED; |
| |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0714 SCSI layer issued Bus Reset Data: x%x\n", ret); |
| return ret; |
| } |
| |
| /** |
| * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt |
| * @cmnd: Pointer to scsi_cmnd data structure. |
| * |
| * This routine does host reset to the adaptor port. It brings the HBA |
| * offline, performs a board restart, and then brings the board back online. |
| * The lpfc_offline calls lpfc_sli_hba_down which will abort and local |
| * reject all outstanding SCSI commands to the host and error returned |
| * back to SCSI mid-level. As this will be SCSI mid-level's last resort |
| * of error handling, it will only return error if resetting of the adapter |
| * is not successful; in all other cases, will return success. |
| * |
| * Return code : |
| * 0x2003 - Error |
| * 0x2002 - Success |
| **/ |
| static int |
| lpfc_host_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; |
| int rc, ret = SUCCESS; |
| |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "3172 SCSI layer issued Host Reset Data:\n"); |
| |
| lpfc_offline_prep(phba, LPFC_MBX_WAIT); |
| lpfc_offline(phba); |
| rc = lpfc_sli_brdrestart(phba); |
| if (rc) |
| ret = FAILED; |
| rc = lpfc_online(phba); |
| if (rc) |
| ret = FAILED; |
| lpfc_unblock_mgmt_io(phba); |
| |
| if (ret == FAILED) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "3323 Failed host reset, bring it offline\n"); |
| lpfc_sli4_offline_eratt(phba); |
| } |
| 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 fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| uint32_t total = 0; |
| uint32_t num_to_alloc = 0; |
| int num_allocated = 0; |
| uint32_t sdev_cnt; |
| struct lpfc_device_data *device_data; |
| unsigned long flags; |
| struct lpfc_name target_wwpn; |
| |
| if (!rport || fc_remote_port_chkready(rport)) |
| return -ENXIO; |
| |
| if (phba->cfg_fof) { |
| |
| /* |
| * Check to see if the device data structure for the lun |
| * exists. If not, create one. |
| */ |
| |
| u64_to_wwn(rport->port_name, target_wwpn.u.wwn); |
| spin_lock_irqsave(&phba->devicelock, flags); |
| device_data = __lpfc_get_device_data(phba, |
| &phba->luns, |
| &vport->fc_portname, |
| &target_wwpn, |
| sdev->lun); |
| if (!device_data) { |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| device_data = lpfc_create_device_data(phba, |
| &vport->fc_portname, |
| &target_wwpn, |
| sdev->lun, true); |
| if (!device_data) |
| return -ENOMEM; |
| spin_lock_irqsave(&phba->devicelock, flags); |
| list_add_tail(&device_data->listentry, &phba->luns); |
| } |
| device_data->rport_data = rport->dd_data; |
| device_data->available = true; |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| sdev->hostdata = device_data; |
| } else { |
| sdev->hostdata = rport->dd_data; |
| } |
| sdev_cnt = atomic_inc_return(&phba->sdev_cnt); |
| |
| /* |
| * 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; |
| |
| /* If allocated buffers are enough do nothing */ |
| if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total) |
| return 0; |
| |
| /* 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; |
| } |
| num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc); |
| if (num_to_alloc != num_allocated) { |
| lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, |
| "0708 Allocation request of %d " |
| "command buffers did not succeed. " |
| "Allocated %d buffers.\n", |
| num_to_alloc, num_allocated); |
| } |
| if (num_allocated > 0) |
| phba->total_scsi_bufs += num_allocated; |
| 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. |
| * - 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; |
| |
| scsi_adjust_queue_depth(sdev, vport->cfg_lun_queue_depth); |
| |
| if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { |
| lpfc_sli_handle_fast_ring_event(phba, |
| &phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ); |
| 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) |
| { |
| struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; |
| struct lpfc_hba *phba = vport->phba; |
| unsigned long flags; |
| struct lpfc_device_data *device_data = sdev->hostdata; |
| |
| atomic_dec(&phba->sdev_cnt); |
| if ((phba->cfg_fof) && (device_data)) { |
| spin_lock_irqsave(&phba->devicelock, flags); |
| device_data->available = false; |
| if (!device_data->oas_enabled) |
| lpfc_delete_device_data(phba, device_data); |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| } |
| sdev->hostdata = NULL; |
| return; |
| } |
| |
| /** |
| * lpfc_create_device_data - creates and initializes device data structure for OAS |
| * @pha: Pointer to host bus adapter structure. |
| * @vport_wwpn: Pointer to vport's wwpn information |
| * @target_wwpn: Pointer to target's wwpn information |
| * @lun: Lun on target |
| * @atomic_create: Flag to indicate if memory should be allocated using the |
| * GFP_ATOMIC flag or not. |
| * |
| * This routine creates a device data structure which will contain identifying |
| * information for the device (host wwpn, target wwpn, lun), state of OAS, |
| * whether or not the corresponding lun is available by the system, |
| * and pointer to the rport data. |
| * |
| * Return codes: |
| * NULL - Error |
| * Pointer to lpfc_device_data - Success |
| **/ |
| struct lpfc_device_data* |
| lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, |
| struct lpfc_name *target_wwpn, uint64_t lun, |
| bool atomic_create) |
| { |
| |
| struct lpfc_device_data *lun_info; |
| int memory_flags; |
| |
| if (unlikely(!phba) || !vport_wwpn || !target_wwpn || |
| !(phba->cfg_fof)) |
| return NULL; |
| |
| /* Attempt to create the device data to contain lun info */ |
| |
| if (atomic_create) |
| memory_flags = GFP_ATOMIC; |
| else |
| memory_flags = GFP_KERNEL; |
| lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags); |
| if (!lun_info) |
| return NULL; |
| INIT_LIST_HEAD(&lun_info->listentry); |
| lun_info->rport_data = NULL; |
| memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn, |
| sizeof(struct lpfc_name)); |
| memcpy(&lun_info->device_id.target_wwpn, target_wwpn, |
| sizeof(struct lpfc_name)); |
| lun_info->device_id.lun = lun; |
| lun_info->oas_enabled = false; |
| lun_info->available = false; |
| return lun_info; |
| } |
| |
| /** |
| * lpfc_delete_device_data - frees a device data structure for OAS |
| * @pha: Pointer to host bus adapter structure. |
| * @lun_info: Pointer to device data structure to free. |
| * |
| * This routine frees the previously allocated device data structure passed. |
| * |
| **/ |
| void |
| lpfc_delete_device_data(struct lpfc_hba *phba, |
| struct lpfc_device_data *lun_info) |
| { |
| |
| if (unlikely(!phba) || !lun_info || |
| !(phba->cfg_fof)) |
| return; |
| |
| if (!list_empty(&lun_info->listentry)) |
| list_del(&lun_info->listentry); |
| mempool_free(lun_info, phba->device_data_mem_pool); |
| return; |
| } |
| |
| /** |
| * __lpfc_get_device_data - returns the device data for the specified lun |
| * @pha: Pointer to host bus adapter structure. |
| * @list: Point to list to search. |
| * @vport_wwpn: Pointer to vport's wwpn information |
| * @target_wwpn: Pointer to target's wwpn information |
| * @lun: Lun on target |
| * |
| * This routine searches the list passed for the specified lun's device data. |
| * This function does not hold locks, it is the responsibility of the caller |
| * to ensure the proper lock is held before calling the function. |
| * |
| * Return codes: |
| * NULL - Error |
| * Pointer to lpfc_device_data - Success |
| **/ |
| struct lpfc_device_data* |
| __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list, |
| struct lpfc_name *vport_wwpn, |
| struct lpfc_name *target_wwpn, uint64_t lun) |
| { |
| |
| struct lpfc_device_data *lun_info; |
| |
| if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn || |
| !phba->cfg_fof) |
| return NULL; |
| |
| /* Check to see if the lun is already enabled for OAS. */ |
| |
| list_for_each_entry(lun_info, list, listentry) { |
| if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn, |
| sizeof(struct lpfc_name)) == 0) && |
| (memcmp(&lun_info->device_id.target_wwpn, target_wwpn, |
| sizeof(struct lpfc_name)) == 0) && |
| (lun_info->device_id.lun == lun)) |
| return lun_info; |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * lpfc_find_next_oas_lun - searches for the next oas lun |
| * @pha: Pointer to host bus adapter structure. |
| * @vport_wwpn: Pointer to vport's wwpn information |
| * @target_wwpn: Pointer to target's wwpn information |
| * @starting_lun: Pointer to the lun to start searching for |
| * @found_vport_wwpn: Pointer to the found lun's vport wwpn information |
| * @found_target_wwpn: Pointer to the found lun's target wwpn information |
| * @found_lun: Pointer to the found lun. |
| * @found_lun_status: Pointer to status of the found lun. |
| * |
| * This routine searches the luns list for the specified lun |
| * or the first lun for the vport/target. If the vport wwpn contains |
| * a zero value then a specific vport is not specified. In this case |
| * any vport which contains the lun will be considered a match. If the |
| * target wwpn contains a zero value then a specific target is not specified. |
| * In this case any target which contains the lun will be considered a |
| * match. If the lun is found, the lun, vport wwpn, target wwpn and lun status |
| * are returned. The function will also return the next lun if available. |
| * If the next lun is not found, starting_lun parameter will be set to |
| * NO_MORE_OAS_LUN. |
| * |
| * Return codes: |
| * non-0 - Error |
| * 0 - Success |
| **/ |
| bool |
| lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, |
| struct lpfc_name *target_wwpn, uint64_t *starting_lun, |
| struct lpfc_name *found_vport_wwpn, |
| struct lpfc_name *found_target_wwpn, |
| uint64_t *found_lun, |
| uint32_t *found_lun_status) |
| { |
| |
| unsigned long flags; |
| struct lpfc_device_data *lun_info; |
| struct lpfc_device_id *device_id; |
| uint64_t lun; |
| bool found = false; |
| |
| if (unlikely(!phba) || !vport_wwpn || !target_wwpn || |
| !starting_lun || !found_vport_wwpn || |
| !found_target_wwpn || !found_lun || !found_lun_status || |
| (*starting_lun == NO_MORE_OAS_LUN) || |
| !phba->cfg_fof) |
| return false; |
| |
| lun = *starting_lun; |
| *found_lun = NO_MORE_OAS_LUN; |
| *starting_lun = NO_MORE_OAS_LUN; |
| |
| /* Search for lun or the lun closet in value */ |
| |
| spin_lock_irqsave(&phba->devicelock, flags); |
| list_for_each_entry(lun_info, &phba->luns, listentry) { |
| if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) || |
| (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn, |
| sizeof(struct lpfc_name)) == 0)) && |
| ((wwn_to_u64(target_wwpn->u.wwn) == 0) || |
| (memcmp(&lun_info->device_id.target_wwpn, target_wwpn, |
| sizeof(struct lpfc_name)) == 0)) && |
| (lun_info->oas_enabled)) { |
| device_id = &lun_info->device_id; |
| if ((!found) && |
| ((lun == FIND_FIRST_OAS_LUN) || |
| (device_id->lun == lun))) { |
| *found_lun = device_id->lun; |
| memcpy(found_vport_wwpn, |
| &device_id->vport_wwpn, |
| sizeof(struct lpfc_name)); |
| memcpy(found_target_wwpn, |
| &device_id->target_wwpn, |
| sizeof(struct lpfc_name)); |
| if (lun_info->available) |
| *found_lun_status = |
| OAS_LUN_STATUS_EXISTS; |
| else |
| *found_lun_status = 0; |
| if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT) |
| memset(vport_wwpn, 0x0, |
| sizeof(struct lpfc_name)); |
| if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET) |
| memset(target_wwpn, 0x0, |
| sizeof(struct lpfc_name)); |
| found = true; |
| } else if (found) { |
| *starting_lun = device_id->lun; |
| memcpy(vport_wwpn, &device_id->vport_wwpn, |
| sizeof(struct lpfc_name)); |
| memcpy(target_wwpn, &device_id->target_wwpn, |
| sizeof(struct lpfc_name)); |
| break; |
| } |
| } |
| } |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| return found; |
| } |
| |
| /** |
| * lpfc_enable_oas_lun - enables a lun for OAS operations |
| * @pha: Pointer to host bus adapter structure. |
| * @vport_wwpn: Pointer to vport's wwpn information |
| * @target_wwpn: Pointer to target's wwpn information |
| * @lun: Lun |
| * |
| * This routine enables a lun for oas operations. The routines does so by |
| * doing the following : |
| * |
| * 1) Checks to see if the device data for the lun has been created. |
| * 2) If found, sets the OAS enabled flag if not set and returns. |
| * 3) Otherwise, creates a device data structure. |
| * 4) If successfully created, indicates the device data is for an OAS lun, |
| * indicates the lun is not available and add to the list of luns. |
| * |
| * Return codes: |
| * false - Error |
| * true - Success |
| **/ |
| bool |
| lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, |
| struct lpfc_name *target_wwpn, uint64_t lun) |
| { |
| |
| struct lpfc_device_data *lun_info; |
| unsigned long flags; |
| |
| if (unlikely(!phba) || !vport_wwpn || !target_wwpn || |
| !phba->cfg_fof) |
| return false; |
| |
| spin_lock_irqsave(&phba->devicelock, flags); |
| |
| /* Check to see if the device data for the lun has been created */ |
| lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn, |
| target_wwpn, lun); |
| if (lun_info) { |
| if (!lun_info->oas_enabled) |
| lun_info->oas_enabled = true; |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| return true; |
| } |
| |
| /* Create an lun info structure and add to list of luns */ |
| lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun, |
| false); |
| if (lun_info) { |
| lun_info->oas_enabled = true; |
| lun_info->available = false; |
| list_add_tail(&lun_info->listentry, &phba->luns); |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| return true; |
| } |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| return false; |
| } |
| |
| /** |
| * lpfc_disable_oas_lun - disables a lun for OAS operations |
| * @pha: Pointer to host bus adapter structure. |
| * @vport_wwpn: Pointer to vport's wwpn information |
| * @target_wwpn: Pointer to target's wwpn information |
| * @lun: Lun |
| * |
| * This routine disables a lun for oas operations. The routines does so by |
| * doing the following : |
| * |
| * 1) Checks to see if the device data for the lun is created. |
| * 2) If present, clears the flag indicating this lun is for OAS. |
| * 3) If the lun is not available by the system, the device data is |
| * freed. |
| * |
| * Return codes: |
| * false - Error |
| * true - Success |
| **/ |
| bool |
| lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn, |
| struct lpfc_name *target_wwpn, uint64_t lun) |
| { |
| |
| struct lpfc_device_data *lun_info; |
| unsigned long flags; |
| |
| if (unlikely(!phba) || !vport_wwpn || !target_wwpn || |
| !phba->cfg_fof) |
| return false; |
| |
| spin_lock_irqsave(&phba->devicelock, flags); |
| |
| /* Check to see if the lun is available. */ |
| lun_info = __lpfc_get_device_data(phba, |
| &phba->luns, vport_wwpn, |
| target_wwpn, lun); |
| if (lun_info) { |
| lun_info->oas_enabled = false; |
| if (!lun_info->available) |
| lpfc_delete_device_data(phba, lun_info); |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| return true; |
| } |
| |
| spin_unlock_irqrestore(&phba->devicelock, flags); |
| return false; |
| } |
| |
| 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_target_reset_handler = lpfc_target_reset_handler, |
| .eh_bus_reset_handler = lpfc_bus_reset_handler, |
| .eh_host_reset_handler = lpfc_host_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, |
| .vendor_id = LPFC_NL_VENDOR_ID, |
| .change_queue_depth = lpfc_change_queue_depth, |
| .change_queue_type = scsi_change_queue_type, |
| .use_blk_tags = 1, |
| }; |
| |
| 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_target_reset_handler = lpfc_target_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, |
| .change_queue_depth = lpfc_change_queue_depth, |
| .change_queue_type = scsi_change_queue_type, |
| .use_blk_tags = 1, |
| }; |