| /******************************************************************* |
| * This file is part of the Emulex Linux Device Driver for * |
| * Fibre Channel Host Bus Adapters. * |
| * Copyright (C) 2004-2015 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_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; |
| scsi_change_queue_depth(sdev, new_queue_depth); |
| } |
| } |
| lpfc_destroy_vport_work_array(phba, vports); |
| atomic_set(&phba->num_rsrc_err, 0); |
| atomic_set(&phba->num_cmd_success, 0); |
| } |
| |
| /** |
| * lpfc_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 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); |
| 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; |
| 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*/ |
| 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; |
| 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*/ |
| 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; |
| 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; |
| |
| 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 |
|