diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_scsi.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_scsi.c | 1235 |
1 files changed, 1176 insertions, 59 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index bd1867411821..b103b6ed4970 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -18,13 +18,14 @@ * more details, a copy of which can be found in the file COPYING * * included with this package. * *******************************************************************/ - #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/delay.h> +#include <asm/unaligned.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> +#include <scsi/scsi_eh.h> #include <scsi/scsi_host.h> #include <scsi/scsi_tcq.h> #include <scsi/scsi_transport_fc.h> @@ -43,6 +44,73 @@ #define LPFC_RESET_WAIT 2 #define LPFC_ABORT_WAIT 2 +int _dump_buf_done; + +static char *dif_op_str[] = { + "SCSI_PROT_NORMAL", + "SCSI_PROT_READ_INSERT", + "SCSI_PROT_WRITE_STRIP", + "SCSI_PROT_READ_STRIP", + "SCSI_PROT_WRITE_INSERT", + "SCSI_PROT_READ_PASS", + "SCSI_PROT_WRITE_PASS", + "SCSI_PROT_READ_CONVERT", + "SCSI_PROT_WRITE_CONVERT" +}; + +static void +lpfc_debug_save_data(struct scsi_cmnd *cmnd) +{ + void *src, *dst; + struct scatterlist *sgde = scsi_sglist(cmnd); + + if (!_dump_buf_data) { + printk(KERN_ERR "BLKGRD ERROR %s _dump_buf_data is NULL\n", + __func__); + return; + } + + + if (!sgde) { + printk(KERN_ERR "BLKGRD ERROR: data scatterlist is null\n"); + return; + } + + dst = (void *) _dump_buf_data; + while (sgde) { + src = sg_virt(sgde); + memcpy(dst, src, sgde->length); + dst += sgde->length; + sgde = sg_next(sgde); + } +} + +static void +lpfc_debug_save_dif(struct scsi_cmnd *cmnd) +{ + void *src, *dst; + struct scatterlist *sgde = scsi_prot_sglist(cmnd); + + if (!_dump_buf_dif) { + printk(KERN_ERR "BLKGRD ERROR %s _dump_buf_data is NULL\n", + __func__); + return; + } + + if (!sgde) { + printk(KERN_ERR "BLKGRD ERROR: prot scatterlist is null\n"); + return; + } + + dst = _dump_buf_dif; + while (sgde) { + src = sg_virt(sgde); + memcpy(dst, src, sgde->length); + dst += sgde->length; + sgde = sg_next(sgde); + } +} + /** * lpfc_update_stats: Update statistical data for the command completion. * @phba: Pointer to HBA object. @@ -66,6 +134,8 @@ lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) 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 || @@ -74,13 +144,15 @@ lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) spin_unlock_irqrestore(shost->host_lock, flags); return; } - latency = jiffies_to_msecs(jiffies - lpfc_cmd->start_time); if (phba->bucket_type == LPFC_LINEAR_BUCKET) { i = (latency + phba->bucket_step - 1 - phba->bucket_base)/ phba->bucket_step; - if (i >= LPFC_MAX_BUCKET_COUNT) - i = LPFC_MAX_BUCKET_COUNT; + /* 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 + @@ -92,7 +164,6 @@ lpfc_update_stats(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) spin_unlock_irqrestore(shost->host_lock, flags); } - /** * lpfc_send_sdev_queuedepth_change_event: Posts a queuedepth change * event. @@ -148,12 +219,19 @@ lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba, return; } -/* - * This function is called with no lock held when there is a resource - * error in driver or in firmware. - */ +/** + * 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_adjust_queue_depth(struct lpfc_hba *phba) +lpfc_rampdown_queue_depth(struct lpfc_hba *phba) { unsigned long flags; uint32_t evt_posted; @@ -182,10 +260,17 @@ lpfc_adjust_queue_depth(struct lpfc_hba *phba) return; } -/* - * This function is called with no lock held when there is a successful - * SCSI command completion. - */ +/** + * lpfc_rampup_queue_depth: Post RAMP_UP_QUEUE event for worker thread. + * @phba: The Hba for which this call is being executed. + * + * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine + * post at most 1 event every 5 minute after last_ramp_up_time or + * last_rsrc_error_time. This routine wakes up worker thread of @phba + * to process WORKER_RAM_DOWN_EVENT event. + * + * This routine should be called with no lock held. + **/ static inline void lpfc_rampup_queue_depth(struct lpfc_vport *vport, struct scsi_device *sdev) @@ -217,6 +302,14 @@ lpfc_rampup_queue_depth(struct lpfc_vport *vport, 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) { @@ -267,6 +360,15 @@ lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) atomic_set(&phba->num_cmd_success, 0); } +/** + * lpfc_ramp_up_queue_handler: WORKER_RAMP_UP_QUEUE event handler. + * @phba: The Hba for which this call is being executed. + * + * This routine is called to process WORKER_RAMP_UP_QUEUE event for worker + * thread.This routine increases queue depth for all scsi device on each vport + * associated with @phba by 1. This routine also sets @phba num_rsrc_err and + * num_cmd_success to zero. + **/ void lpfc_ramp_up_queue_handler(struct lpfc_hba *phba) { @@ -336,14 +438,21 @@ lpfc_scsi_dev_block(struct lpfc_hba *phba) lpfc_destroy_vport_work_array(phba, vports); } -/* +/** + * lpfc_new_scsi_buf: Scsi buffer allocator. + * @vport: The virtual port for which this call being executed. + * * This routine allocates a scsi buffer, which contains all the necessary * information needed to initiate a SCSI I/O. The non-DMAable buffer region * contains information to build the IOCB. The DMAable region contains - * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to - * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL + * memory for the FCP CMND, FCP RSP, and the initial BPL. In addition to + * allocating memory, the FCP CMND and FCP RSP BDEs are setup in the BPL * and the BPL BDE is setup in the IOCB. - */ + * + * Return codes: + * NULL - Error + * Pointer to lpfc_scsi_buf data structure - Success + **/ static struct lpfc_scsi_buf * lpfc_new_scsi_buf(struct lpfc_vport *vport) { @@ -407,14 +516,14 @@ lpfc_new_scsi_buf(struct lpfc_vport *vport) 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->tus.w); + 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->tus.w); + 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, @@ -422,7 +531,8 @@ lpfc_new_scsi_buf(struct lpfc_vport *vport) */ iocb = &psb->cur_iocbq.iocb; iocb->un.fcpi64.bdl.ulpIoTag32 = 0; - if (phba->sli_rev == 3) { + 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); @@ -452,6 +562,17 @@ lpfc_new_scsi_buf(struct lpfc_vport *vport) return psb; } +/** + * lpfc_get_scsi_buf: Get a scsi buffer from lpfc_scsi_buf_list list of Hba. + * @phba: The Hba for which this call is being executed. + * + * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list + * and returns to caller. + * + * Return codes: + * NULL - Error + * Pointer to lpfc_scsi_buf - Success + **/ static struct lpfc_scsi_buf* lpfc_get_scsi_buf(struct lpfc_hba * phba) { @@ -464,11 +585,20 @@ lpfc_get_scsi_buf(struct lpfc_hba * phba) if (lpfc_cmd) { lpfc_cmd->seg_cnt = 0; lpfc_cmd->nonsg_phys = 0; + lpfc_cmd->prot_seg_cnt = 0; } spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); return lpfc_cmd; } +/** + * lpfc_release_scsi_buf: Return a scsi buffer back to hba lpfc_scsi_buf_list 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) { @@ -480,6 +610,20 @@ lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb) spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); } +/** + * lpfc_scsi_prep_dma_buf: Routine to do DMA mapping for scsi buffer. + * @phba: The Hba for which this call is being executed. + * @lpfc_cmd: The scsi buffer which is going to be mapped. + * + * This routine does the pci dma mapping for scatter-gather list of scsi cmnd + * field of @lpfc_cmd. This routine scans through sg elements and format the + * bdea. This routine also initializes all IOCB fields which are dependent on + * scsi command request buffer. + * + * Return codes: + * 1 - Error + * 0 - Success + **/ static int lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) { @@ -516,7 +660,7 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) lpfc_cmd->seg_cnt = nseg; if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { printk(KERN_ERR "%s: Too many sg segments from " - "dma_map_sg. Config %d, seg_cnt %d", + "dma_map_sg. Config %d, seg_cnt %d\n", __func__, phba->cfg_sg_seg_cnt, lpfc_cmd->seg_cnt); scsi_dma_unmap(scsi_cmnd); @@ -535,6 +679,7 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) { physaddr = sg_dma_address(sgel); if (phba->sli_rev == 3 && + !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && nseg <= LPFC_EXT_DATA_BDE_COUNT) { data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; data_bde->tus.f.bdeSize = sg_dma_len(sgel); @@ -560,7 +705,8 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) * 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) { + if (phba->sli_rev == 3 && + !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) { if (num_bde > LPFC_EXT_DATA_BDE_COUNT) { /* * The extended IOCB format can only fit 3 BDE or a BPL. @@ -587,7 +733,683 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd) ((num_bde + 2) * sizeof(struct ulp_bde64)); } fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); + + /* + * Due to difference in data length between DIF/non-DIF paths, + * we need to set word 4 of IOCB here + */ + iocb_cmd->un.fcpi.fcpi_parm = le32_to_cpu(scsi_bufflen(scsi_cmnd)); + return 0; +} + +/* + * Given a scsi cmnd, determine the BlockGuard profile to be used + * with the cmd + */ +static int +lpfc_sc_to_sli_prof(struct scsi_cmnd *sc) +{ + uint8_t guard_type = scsi_host_get_guard(sc->device->host); + uint8_t ret_prof = LPFC_PROF_INVALID; + + if (guard_type == SHOST_DIX_GUARD_IP) { + switch (scsi_get_prot_op(sc)) { + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + ret_prof = LPFC_PROF_AST2; + break; + + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + ret_prof = LPFC_PROF_A1; + break; + + case SCSI_PROT_READ_CONVERT: + case SCSI_PROT_WRITE_CONVERT: + ret_prof = LPFC_PROF_AST1; + break; + + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + case SCSI_PROT_NORMAL: + default: + printk(KERN_ERR "Bad op/guard:%d/%d combination\n", + scsi_get_prot_op(sc), guard_type); + break; + + } + } else if (guard_type == SHOST_DIX_GUARD_CRC) { + switch (scsi_get_prot_op(sc)) { + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + ret_prof = LPFC_PROF_A1; + break; + + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + ret_prof = LPFC_PROF_C1; + break; + + case SCSI_PROT_READ_CONVERT: + case SCSI_PROT_WRITE_CONVERT: + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + case SCSI_PROT_NORMAL: + default: + printk(KERN_ERR "Bad op/guard:%d/%d combination\n", + scsi_get_prot_op(sc), guard_type); + break; + } + } else { + /* unsupported format */ + BUG(); + } + + return ret_prof; +} + +struct scsi_dif_tuple { + __be16 guard_tag; /* Checksum */ + __be16 app_tag; /* Opaque storage */ + __be32 ref_tag; /* Target LBA or indirect LBA */ +}; + +static inline unsigned +lpfc_cmd_blksize(struct scsi_cmnd *sc) +{ + return sc->device->sector_size; +} + +/** + * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command + * @sc: in: SCSI command + * @apptagmask out: app tag mask + * @apptagval out: app tag value + * @reftag out: ref tag (reference tag) + * + * Description: + * Extract DIF paramters from the command if possible. Otherwise, + * use default paratmers. + * + **/ +static inline void +lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask, + uint16_t *apptagval, uint32_t *reftag) +{ + struct scsi_dif_tuple *spt; + unsigned char op = scsi_get_prot_op(sc); + unsigned int protcnt = scsi_prot_sg_count(sc); + static int cnt; + + if (protcnt && (op == SCSI_PROT_WRITE_STRIP || + op == SCSI_PROT_WRITE_PASS || + op == SCSI_PROT_WRITE_CONVERT)) { + + cnt++; + spt = page_address(sg_page(scsi_prot_sglist(sc))) + + scsi_prot_sglist(sc)[0].offset; + *apptagmask = 0; + *apptagval = 0; + *reftag = cpu_to_be32(spt->ref_tag); + + } else { + /* SBC defines ref tag to be lower 32bits of LBA */ + *reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc)); + *apptagmask = 0; + *apptagval = 0; + } +} + +/* + * This function sets up buffer list for protection groups of + * type LPFC_PG_TYPE_NO_DIF + * + * This is usually used when the HBA is instructed to generate + * DIFs and insert them into data stream (or strip DIF from + * incoming data stream) + * + * The buffer list consists of just one protection group described + * below: + * +-------------------------+ + * start of prot group --> | PDE_1 | + * +-------------------------+ + * | Data BDE | + * +-------------------------+ + * |more Data BDE's ... (opt)| + * +-------------------------+ + * + * @sc: pointer to scsi command we're working on + * @bpl: pointer to buffer list for protection groups + * @datacnt: number of segments of data that have been dma mapped + * + * Note: Data s/g buffers have been dma mapped + */ +static int +lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc, + struct ulp_bde64 *bpl, int datasegcnt) +{ + struct scatterlist *sgde = NULL; /* s/g data entry */ + struct lpfc_pde *pde1 = NULL; + dma_addr_t physaddr; + int i = 0, num_bde = 0; + int datadir = sc->sc_data_direction; + int prof = LPFC_PROF_INVALID; + unsigned blksize; + uint32_t reftag; + uint16_t apptagmask, apptagval; + + pde1 = (struct lpfc_pde *) bpl; + prof = lpfc_sc_to_sli_prof(sc); + + if (prof == LPFC_PROF_INVALID) + goto out; + + /* extract some info from the scsi command for PDE1*/ + blksize = lpfc_cmd_blksize(sc); + lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag); + + /* setup PDE1 with what we have */ + lpfc_pde_set_bg_parms(pde1, LPFC_PDE1_DESCRIPTOR, prof, blksize, + BG_EC_STOP_ERR); + lpfc_pde_set_dif_parms(pde1, apptagmask, apptagval, reftag); + + num_bde++; + bpl++; + + /* assumption: caller has already run dma_map_sg on command data */ + scsi_for_each_sg(sc, sgde, datasegcnt, i) { + physaddr = sg_dma_address(sgde); + bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); + bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); + bpl->tus.f.bdeSize = sg_dma_len(sgde); + if (datadir == DMA_TO_DEVICE) + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; + else + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; + bpl->tus.w = le32_to_cpu(bpl->tus.w); + bpl++; + num_bde++; + } + +out: + return num_bde; +} + +/* + * This function sets up buffer list for protection groups of + * type LPFC_PG_TYPE_DIF_BUF + * + * This is usually used when DIFs are in their own buffers, + * separate from the data. The HBA can then by instructed + * to place the DIFs in the outgoing stream. For read operations, + * The HBA could extract the DIFs and place it in DIF buffers. + * + * The buffer list for this type consists of one or more of the + * protection groups described below: + * +-------------------------+ + * start of first prot group --> | PDE_1 | + * +-------------------------+ + * | PDE_3 (Prot BDE) | + * +-------------------------+ + * | Data BDE | + * +-------------------------+ + * |more Data BDE's ... (opt)| + * +-------------------------+ + * start of new prot group --> | PDE_1 | + * +-------------------------+ + * | ... | + * +-------------------------+ + * + * @sc: pointer to scsi command we're working on + * @bpl: pointer to buffer list for protection groups + * @datacnt: number of segments of data that have been dma mapped + * @protcnt: number of segment of protection data that have been dma mapped + * + * Note: It is assumed that both data and protection s/g buffers have been + * mapped for DMA + */ +static int +lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc, + struct ulp_bde64 *bpl, int datacnt, int protcnt) +{ + struct scatterlist *sgde = NULL; /* s/g data entry */ + struct scatterlist *sgpe = NULL; /* s/g prot entry */ + struct lpfc_pde *pde1 = NULL; + struct ulp_bde64 *prot_bde = NULL; + dma_addr_t dataphysaddr, protphysaddr; + unsigned short curr_data = 0, curr_prot = 0; + unsigned int split_offset, protgroup_len; + unsigned int protgrp_blks, protgrp_bytes; + unsigned int remainder, subtotal; + int prof = LPFC_PROF_INVALID; + int datadir = sc->sc_data_direction; + unsigned char pgdone = 0, alldone = 0; + unsigned blksize; + uint32_t reftag; + uint16_t apptagmask, apptagval; + int num_bde = 0; + + sgpe = scsi_prot_sglist(sc); + sgde = scsi_sglist(sc); + + if (!sgpe || !sgde) { + lpfc_printf_log(phba, KERN_ERR, LOG_FCP, + "9020 Invalid s/g entry: data=0x%p prot=0x%p\n", + sgpe, sgde); + return 0; + } + + prof = lpfc_sc_to_sli_prof(sc); + if (prof == LPFC_PROF_INVALID) + goto out; + + /* extract some info from the scsi command for PDE1*/ + blksize = lpfc_cmd_blksize(sc); + lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag); + + split_offset = 0; + do { + /* setup the first PDE_1 */ + pde1 = (struct lpfc_pde *) bpl; + + lpfc_pde_set_bg_parms(pde1, LPFC_PDE1_DESCRIPTOR, prof, blksize, + BG_EC_STOP_ERR); + lpfc_pde_set_dif_parms(pde1, apptagmask, apptagval, reftag); + + num_bde++; + bpl++; + + /* setup the first BDE that points to protection buffer */ + prot_bde = (struct ulp_bde64 *) bpl; + protphysaddr = sg_dma_address(sgpe); + prot_bde->addrLow = le32_to_cpu(putPaddrLow(protphysaddr)); + prot_bde->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr)); + protgroup_len = sg_dma_len(sgpe); + + + /* must be integer multiple of the DIF block length */ + BUG_ON(protgroup_len % 8); + + protgrp_blks = protgroup_len / 8; + protgrp_bytes = protgrp_blks * blksize; + + prot_bde->tus.f.bdeSize = protgroup_len; + if (datadir == DMA_TO_DEVICE) + prot_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64; + else + prot_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; + prot_bde->tus.w = le32_to_cpu(bpl->tus.w); + + curr_prot++; + num_bde++; + + /* setup BDE's for data blocks associated with DIF data */ + pgdone = 0; + subtotal = 0; /* total bytes processed for current prot grp */ + while (!pgdone) { + if (!sgde) { + printk(KERN_ERR "%s Invalid data segment\n", + __func__); + return 0; + } + bpl++; + dataphysaddr = sg_dma_address(sgde) + split_offset; + bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr)); + bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr)); + + remainder = sg_dma_len(sgde) - split_offset; + + if ((subtotal + remainder) <= protgrp_bytes) { + /* we can use this whole buffer */ + bpl->tus.f.bdeSize = remainder; + split_offset = 0; + + if ((subtotal + remainder) == protgrp_bytes) + pgdone = 1; + } else { + /* must split this buffer with next prot grp */ + bpl->tus.f.bdeSize = protgrp_bytes - subtotal; + split_offset += bpl->tus.f.bdeSize; + } + + subtotal += bpl->tus.f.bdeSize; + + if (datadir == DMA_TO_DEVICE) + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64; + else + bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I; + bpl->tus.w = le32_to_cpu(bpl->tus.w); + + num_bde++; + curr_data++; + + if (split_offset) + break; + + /* Move to the next s/g segment if possible */ + sgde = sg_next(sgde); + } + + /* are we done ? */ + if (curr_prot == protcnt) { + alldone = 1; + } else if (curr_prot < protcnt) { + /* advance to next prot buffer */ + sgpe = sg_next(sgpe); + bpl++; + + /* update the reference tag */ + reftag += protgrp_blks; + } else { + /* if we're here, we have a bug */ + printk(KERN_ERR "BLKGRD: bug in %s\n", __func__); + } + + } while (!alldone); + +out: + + + return num_bde; +} +/* + * Given a SCSI command that supports DIF, determine composition of protection + * groups involved in setting up buffer lists + * + * Returns: + * for DIF (for both read and write) + * */ +static int +lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc) +{ + int ret = LPFC_PG_TYPE_INVALID; + unsigned char op = scsi_get_prot_op(sc); + + switch (op) { + case SCSI_PROT_READ_STRIP: + case SCSI_PROT_WRITE_INSERT: + ret = LPFC_PG_TYPE_NO_DIF; + break; + case SCSI_PROT_READ_INSERT: + case SCSI_PROT_WRITE_STRIP: + case SCSI_PROT_READ_PASS: + case SCSI_PROT_WRITE_PASS: + case SCSI_PROT_WRITE_CONVERT: + case SCSI_PROT_READ_CONVERT: + ret = LPFC_PG_TYPE_DIF_BUF; + break; + default: + lpfc_printf_log(phba, KERN_ERR, LOG_FCP, + "9021 Unsupported protection op:%d\n", op); + break; + } + + return ret; +} + +/* + * This is the protection/DIF aware version of + * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the + * two functions eventually, but for now, it's here + */ +static int +lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, + struct lpfc_scsi_buf *lpfc_cmd) +{ + struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; + struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; + struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; + IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; + uint32_t num_bde = 0; + int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction; + int prot_group_type = 0; + int diflen, fcpdl; + unsigned blksize; + + /* + * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd + * fcp_rsp regions to the first data bde entry + */ + bpl += 2; + if (scsi_sg_count(scsi_cmnd)) { + /* + * The driver stores the segment count returned from pci_map_sg + * because this a count of dma-mappings used to map the use_sg + * pages. They are not guaranteed to be the same for those + * architectures that implement an IOMMU. + */ + datasegcnt = dma_map_sg(&phba->pcidev->dev, + scsi_sglist(scsi_cmnd), + scsi_sg_count(scsi_cmnd), datadir); + if (unlikely(!datasegcnt)) + return 1; + + lpfc_cmd->seg_cnt = datasegcnt; + if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { + printk(KERN_ERR "%s: Too many sg segments from " + "dma_map_sg. Config %d, seg_cnt %d\n", + __func__, phba->cfg_sg_seg_cnt, + lpfc_cmd->seg_cnt); + scsi_dma_unmap(scsi_cmnd); + return 1; + } + + prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd); + + switch (prot_group_type) { + case LPFC_PG_TYPE_NO_DIF: + num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl, + datasegcnt); + /* we shoud have 2 or more entries in buffer list */ + if (num_bde < 2) + goto err; + break; + case LPFC_PG_TYPE_DIF_BUF:{ + /* + * This type indicates that protection buffers are + * passed to the driver, so that needs to be prepared + * for DMA + */ + protsegcnt = dma_map_sg(&phba->pcidev->dev, + scsi_prot_sglist(scsi_cmnd), + scsi_prot_sg_count(scsi_cmnd), datadir); + if (unlikely(!protsegcnt)) { + scsi_dma_unmap(scsi_cmnd); + return 1; + } + + lpfc_cmd->prot_seg_cnt = protsegcnt; + if (lpfc_cmd->prot_seg_cnt + > phba->cfg_prot_sg_seg_cnt) { + printk(KERN_ERR "%s: Too many prot sg segments " + "from dma_map_sg. Config %d," + "prot_seg_cnt %d\n", __func__, + phba->cfg_prot_sg_seg_cnt, + lpfc_cmd->prot_seg_cnt); + dma_unmap_sg(&phba->pcidev->dev, + scsi_prot_sglist(scsi_cmnd), + scsi_prot_sg_count(scsi_cmnd), + datadir); + scsi_dma_unmap(scsi_cmnd); + return 1; + } + + num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl, + datasegcnt, protsegcnt); + /* we shoud have 3 or more entries in buffer list */ + if (num_bde < 3) + goto err; + break; + } + case LPFC_PG_TYPE_INVALID: + default: + lpfc_printf_log(phba, KERN_ERR, LOG_FCP, + "9022 Unexpected protection group %i\n", + prot_group_type); + return 1; + } + } + + /* + * Finish initializing those IOCB fields that are dependent on the + * scsi_cmnd request_buffer. Note that the bdeSize is explicitly + * reinitialized since all iocb memory resources are used many times + * for transmit, receive, and continuation bpl's. + */ + iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64)); + iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64)); + iocb_cmd->ulpBdeCount = 1; + iocb_cmd->ulpLe = 1; + + fcpdl = scsi_bufflen(scsi_cmnd); + + if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) { + /* + * We are in DIF Type 1 mode + * Every data block has a 8 byte DIF (trailer) + * attached to it. Must ajust FCP data length + */ + blksize = lpfc_cmd_blksize(scsi_cmnd); + diflen = (fcpdl / blksize) * 8; + fcpdl += diflen; + } + fcp_cmnd->fcpDl = be32_to_cpu(fcpdl); + + /* + * Due to difference in data length between DIF/non-DIF paths, + * we need to set word 4 of IOCB here + */ + iocb_cmd->un.fcpi.fcpi_parm = fcpdl; + return 0; +err: + lpfc_printf_log(phba, KERN_ERR, LOG_FCP, + "9023 Could not setup all needed BDE's" + "prot_group_type=%d, num_bde=%d\n", + prot_group_type, num_bde); + return 1; +} + +/* + * This function checks for BlockGuard errors detected by + * the HBA. In case of errors, the ASC/ASCQ fields in the + * sense buffer will be set accordingly, paired with + * ILLEGAL_REQUEST to signal to the kernel that the HBA + * detected corruption. + * + * Returns: + * 0 - No error found + * 1 - BlockGuard error found + * -1 - Internal error (bad profile, ...etc) + */ +static int +lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, + struct lpfc_iocbq *pIocbOut) +{ + struct scsi_cmnd *cmd = lpfc_cmd->pCmd; + struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg; + int ret = 0; + uint32_t bghm = bgf->bghm; + uint32_t bgstat = bgf->bgstat; + uint64_t failing_sector = 0; + + printk(KERN_ERR "BG ERROR in cmd 0x%x lba 0x%llx blk cnt 0x%lx " + "bgstat=0x%x bghm=0x%x\n", + cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd), + cmd->request->nr_sectors, bgstat, bghm); + + spin_lock(&_dump_buf_lock); + if (!_dump_buf_done) { + printk(KERN_ERR "Saving Data for %u blocks to debugfs\n", + (cmd->cmnd[7] << 8 | cmd->cmnd[8])); + lpfc_debug_save_data(cmd); + + /* If we have a prot sgl, save the DIF buffer */ + if (lpfc_prot_group_type(phba, cmd) == + LPFC_PG_TYPE_DIF_BUF) { + printk(KERN_ERR "Saving DIF for %u blocks to debugfs\n", + (cmd->cmnd[7] << 8 | cmd->cmnd[8])); + lpfc_debug_save_dif(cmd); + } + + _dump_buf_done = 1; + } + spin_unlock(&_dump_buf_lock); + + if (lpfc_bgs_get_invalid_prof(bgstat)) { + cmd->result = ScsiResult(DID_ERROR, 0); + printk(KERN_ERR "Invalid BlockGuard profile. bgstat:0x%x\n", + bgstat); + ret = (-1); + goto out; + } + + if (lpfc_bgs_get_uninit_dif_block(bgstat)) { + cmd->result = ScsiResult(DID_ERROR, 0); + printk(KERN_ERR "Invalid BlockGuard DIF Block. bgstat:0x%x\n", + bgstat); + ret = (-1); + goto out; + } + + if (lpfc_bgs_get_guard_err(bgstat)) { + ret = 1; + + scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, + 0x10, 0x1); + cmd->result = (DRIVER_SENSE|SUGGEST_DIE) << 24 + | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); + phba->bg_guard_err_cnt++; + printk(KERN_ERR "BLKGRD: guard_tag error\n"); + } + + if (lpfc_bgs_get_reftag_err(bgstat)) { + ret = 1; + + scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, + 0x10, 0x3); + cmd->result = (DRIVER_SENSE|SUGGEST_DIE) << 24 + | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); + + phba->bg_reftag_err_cnt++; + printk(KERN_ERR "BLKGRD: ref_tag error\n"); + } + + if (lpfc_bgs_get_apptag_err(bgstat)) { + ret = 1; + + scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST, + 0x10, 0x2); + cmd->result = (DRIVER_SENSE|SUGGEST_DIE) << 24 + | ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION); + + phba->bg_apptag_err_cnt++; + printk(KERN_ERR "BLKGRD: app_tag error\n"); + } + + if (lpfc_bgs_get_hi_water_mark_present(bgstat)) { + /* + * setup sense data descriptor 0 per SPC-4 as an information + * field, and put the failing LBA in it + */ + cmd->sense_buffer[8] = 0; /* Information */ + cmd->sense_buffer[9] = 0xa; /* Add. length */ + do_div(bghm, cmd->device->sector_size); + + failing_sector = scsi_get_lba(cmd); + failing_sector += bghm; + + put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]); + } + + if (!ret) { + /* No error was reported - problem in FW? */ + cmd->result = ScsiResult(DID_ERROR, 0); + printk(KERN_ERR "BLKGRD: no errors reported!\n"); + } + +out: + return ret; } /** @@ -681,6 +1503,15 @@ lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport, lpfc_worker_wake_up(phba); return; } + +/** + * lpfc_scsi_unprep_dma_buf: Routine to un-map DMA mapping of scatter gather. + * @phba: The Hba for which this call is being executed. + * @psb: The scsi buffer which is going to be un-mapped. + * + * This routine does DMA un-mapping of scatter gather list of scsi command + * field of @lpfc_cmd. + **/ static void lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb) { @@ -692,8 +1523,22 @@ lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb) */ if (psb->seg_cnt > 0) scsi_dma_unmap(psb->pCmd); + if (psb->prot_seg_cnt > 0) + dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd), + scsi_prot_sg_count(psb->pCmd), + psb->pCmd->sc_data_direction); } +/** + * lpfc_handler_fcp_err: FCP response handler. + * @vport: The virtual port for which this call is being executed. + * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. + * @rsp_iocb: The response IOCB which contains FCP error. + * + * This routine is called to process response IOCB with status field + * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command + * based upon SCSI and FCP error. + **/ static void lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) @@ -735,7 +1580,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, logit = LOG_FCP; lpfc_printf_vlog(vport, KERN_WARNING, logit, - "0730 FCP command x%x failed: x%x SNS x%x x%x " + "9024 FCP command x%x failed: x%x SNS x%x x%x " "Data: x%x x%x x%x x%x x%x\n", cmnd->cmnd[0], scsi_status, be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info, @@ -758,7 +1603,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId)); lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, - "0716 FCP Read Underrun, expected %d, " + "9025 FCP Read Underrun, expected %d, " "residual %d Data: x%x x%x x%x\n", be32_to_cpu(fcpcmd->fcpDl), scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0], @@ -774,7 +1619,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, (scsi_get_resid(cmnd) != fcpi_parm)) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, - "0735 FCP Read Check Error " + "9026 FCP Read Check Error " "and Underrun Data: x%x x%x x%x x%x\n", be32_to_cpu(fcpcmd->fcpDl), scsi_get_resid(cmnd), fcpi_parm, @@ -793,7 +1638,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) { lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, - "0717 FCP command x%x residual " + "9027 FCP command x%x residual " "underrun converted to error " "Data: x%x x%x x%x\n", cmnd->cmnd[0], scsi_bufflen(cmnd), @@ -802,7 +1647,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, } } else if (resp_info & RESID_OVER) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, - "0720 FCP command x%x residual overrun error. " + "9028 FCP command x%x residual overrun error. " "Data: x%x x%x \n", cmnd->cmnd[0], scsi_bufflen(cmnd), scsi_get_resid(cmnd)); host_status = DID_ERROR; @@ -814,7 +1659,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR, - "0734 FCP Read Check Error Data: " + "9029 FCP Read Check Error Data: " "x%x x%x x%x x%x\n", be32_to_cpu(fcpcmd->fcpDl), be32_to_cpu(fcprsp->rspResId), @@ -828,6 +1673,16 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb); } +/** + * lpfc_scsi_cmd_iocb_cmpl: Scsi cmnd IOCB completion routine. + * @phba: The Hba for which this call is being executed. + * @pIocbIn: The command IOCBQ for the scsi cmnd. + * @pIocbOut: The response IOCBQ for the scsi cmnd . + * + * This routine assigns scsi command result by looking into response IOCB + * status field appropriately. This routine handles QUEUE FULL condition as + * well by ramping down device queue depth. + **/ static void lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, struct lpfc_iocbq *pIocbOut) @@ -846,7 +1701,8 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; lpfc_cmd->status = pIocbOut->iocb.ulpStatus; - atomic_dec(&pnode->cmd_pending); + if (pnode && NLP_CHK_NODE_ACT(pnode)) + atomic_dec(&pnode->cmd_pending); if (lpfc_cmd->status) { if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && @@ -856,7 +1712,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, lpfc_cmd->status = IOSTAT_DEFAULT; lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, - "0729 FCP cmd x%x failed <%d/%d> " + "9030 FCP cmd x%x failed <%d/%d> " "status: x%x result: x%x Data: x%x x%x\n", cmd->cmnd[0], cmd->device ? cmd->device->id : 0xffff, @@ -904,7 +1760,28 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, lpfc_cmd->result == IOERR_ABORT_REQUESTED) { cmd->result = ScsiResult(DID_REQUEUE, 0); break; - } /* else: fall through */ + } + + if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED || + lpfc_cmd->result == IOERR_TX_DMA_FAILED) && + pIocbOut->iocb.unsli3.sli3_bg.bgstat) { + if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) { + /* + * This is a response for a BG enabled + * cmd. Parse BG error + */ + lpfc_parse_bg_err(phba, lpfc_cmd, + pIocbOut); + break; + } else { + lpfc_printf_vlog(vport, KERN_WARNING, + LOG_BG, + "9031 non-zero BGSTAT " + "on unprotected cmd"); + } + } + + /* else: fall through */ default: cmd->result = ScsiResult(DID_ERROR, 0); break; @@ -936,23 +1813,31 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, time_after(jiffies, lpfc_cmd->start_time + msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) { spin_lock_irqsave(sdev->host->host_lock, flags); - if ((pnode->cmd_qdepth > atomic_read(&pnode->cmd_pending) && - (atomic_read(&pnode->cmd_pending) > LPFC_MIN_TGT_QDEPTH) && - ((cmd->cmnd[0] == READ_10) || (cmd->cmnd[0] == WRITE_10)))) - pnode->cmd_qdepth = atomic_read(&pnode->cmd_pending); - - pnode->last_change_time = jiffies; + if (pnode && NLP_CHK_NODE_ACT(pnode)) { + if (pnode->cmd_qdepth > + atomic_read(&pnode->cmd_pending) && + (atomic_read(&pnode->cmd_pending) > + LPFC_MIN_TGT_QDEPTH) && + ((cmd->cmnd[0] == READ_10) || + (cmd->cmnd[0] == WRITE_10))) + pnode->cmd_qdepth = + atomic_read(&pnode->cmd_pending); + + pnode->last_change_time = jiffies; + } spin_unlock_irqrestore(sdev->host->host_lock, flags); - } else if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) && + } else if (pnode && NLP_CHK_NODE_ACT(pnode)) { + if ((pnode->cmd_qdepth < LPFC_MAX_TGT_QDEPTH) && time_after(jiffies, pnode->last_change_time + - msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { - spin_lock_irqsave(sdev->host->host_lock, flags); - pnode->cmd_qdepth += pnode->cmd_qdepth * - LPFC_TGTQ_RAMPUP_PCENT / 100; - if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH) - pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH; - pnode->last_change_time = jiffies; - spin_unlock_irqrestore(sdev->host->host_lock, flags); + msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) { + spin_lock_irqsave(sdev->host->host_lock, flags); + pnode->cmd_qdepth += pnode->cmd_qdepth * + LPFC_TGTQ_RAMPUP_PCENT / 100; + if (pnode->cmd_qdepth > LPFC_MAX_TGT_QDEPTH) + pnode->cmd_qdepth = LPFC_MAX_TGT_QDEPTH; + pnode->last_change_time = jiffies; + spin_unlock_irqrestore(sdev->host->host_lock, flags); + } } lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); @@ -1067,6 +1952,15 @@ lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd) } } +/** + * lpfc_scsi_prep_cmnd: Routine to convert scsi cmnd to FCP information unit. + * @vport: The virtual port for which this call is being executed. + * @lpfc_cmd: The scsi command which needs to send. + * @pnode: Pointer to lpfc_nodelist. + * + * This routine initializes fcp_cmnd and iocb data structure from scsi command + * to transfer. + **/ static void lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_nodelist *pnode) @@ -1122,7 +2016,6 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, } else { iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; iocb_cmd->ulpPU = PARM_READ_CHECK; - iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd); fcp_cmnd->fcpCntl3 = READ_DATA; phba->fc4InputRequests++; } @@ -1133,7 +2026,8 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, fcp_cmnd->fcpCntl3 = 0; phba->fc4ControlRequests++; } - if (phba->sli_rev == 3) + if (phba->sli_rev == 3 && + !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd); /* * Finish initializing those IOCB fields that are independent @@ -1152,6 +2046,19 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, piocbq->vport = vport; } +/** + * lpfc_scsi_prep_task_mgmt_cmnd: Convert scsi TM cmnd to FCP information unit. + * @vport: The virtual port for which this call is being executed. + * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure. + * @lun: Logical unit number. + * @task_mgmt_cmd: SCSI task management command. + * + * This routine creates FCP information unit corresponding to @task_mgmt_cmd. + * + * Return codes: + * 0 - Error + * 1 - Success + **/ static int lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd, @@ -1178,7 +2085,8 @@ lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); int_to_scsilun(lun, &fcp_cmnd->fcp_lun); fcp_cmnd->fcpCntl2 = task_mgmt_cmd; - if (vport->phba->sli_rev == 3) + if (vport->phba->sli_rev == 3 && + !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED)) lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd); piocb->ulpCommand = CMD_FCP_ICMND64_CR; piocb->ulpContext = ndlp->nlp_rpi; @@ -1201,6 +2109,15 @@ lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport, return 1; } +/** + * lpc_taskmgmt_def_cmpl: IOCB completion routine for task management command. + * @phba: The Hba for which this call is being executed. + * @cmdiocbq: Pointer to lpfc_iocbq data structure. + * @rspiocbq: Pointer to lpfc_iocbq data structure. + * + * This routine is IOCB completion routine for device reset and target reset + * routine. This routine release scsi buffer associated with lpfc_cmd. + **/ static void lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocbq, @@ -1213,6 +2130,20 @@ lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba, return; } +/** + * lpfc_scsi_tgt_reset: Target reset handler. + * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure + * @vport: The virtual port for which this call is being executed. + * @tgt_id: Target ID. + * @lun: Lun number. + * @rdata: Pointer to lpfc_rport_data. + * + * This routine issues a TARGET RESET iocb to reset a target with @tgt_id ID. + * + * Return Code: + * 0x2003 - Error + * 0x2002 - Success. + **/ static int lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport, unsigned tgt_id, unsigned int lun, @@ -1266,6 +2197,15 @@ lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport, return ret; } +/** + * lpfc_info: Info entry point of scsi_host_template data structure. + * @host: The scsi host for which this call is being executed. + * + * This routine provides module information about hba. + * + * Reutrn code: + * Pointer to char - Success. + **/ const char * lpfc_info(struct Scsi_Host *host) { @@ -1295,6 +2235,13 @@ lpfc_info(struct Scsi_Host *host) return lpfcinfobuf; } +/** + * lpfc_poll_rearm_time: Routine to modify fcp_poll timer of hba. + * @phba: The Hba for which this call is being executed. + * + * This routine modifies fcp_poll_timer field of @phba by cfg_poll_tmo. + * The default value of cfg_poll_tmo is 10 milliseconds. + **/ static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) { unsigned long poll_tmo_expires = @@ -1305,11 +2252,25 @@ static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) poll_tmo_expires); } +/** + * lpfc_poll_start_timer: Routine to start fcp_poll_timer of HBA. + * @phba: The Hba for which this call is being executed. + * + * This routine starts the fcp_poll_timer of @phba. + **/ void lpfc_poll_start_timer(struct lpfc_hba * phba) { lpfc_poll_rearm_timer(phba); } +/** + * lpfc_poll_timeout: Restart polling timer. + * @ptr: Map to lpfc_hba data structure pointer. + * + * This routine restarts fcp_poll timer, when FCP ring polling is enable + * and FCP Ring interrupt is disable. + **/ + void lpfc_poll_timeout(unsigned long ptr) { struct lpfc_hba *phba = (struct lpfc_hba *) ptr; @@ -1321,6 +2282,20 @@ void lpfc_poll_timeout(unsigned long ptr) } } +/** + * lpfc_queuecommand: Queuecommand entry point of Scsi Host Templater data + * structure. + * @cmnd: Pointer to scsi_cmnd data structure. + * @done: Pointer to done routine. + * + * Driver registers this routine to scsi midlayer to submit a @cmd to process. + * This routine prepares an IOCB from scsi command and provides to firmware. + * The @done callback is invoked after driver finished processing the command. + * + * Return value : + * 0 - Success + * SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily. + **/ static int lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) { @@ -1340,6 +2315,17 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) goto out_fail_command; } + if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) && + scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { + + printk(KERN_ERR "BLKGRD ERROR: rcvd protected cmd:%02x op:%02x " + "str=%s without registering for BlockGuard - " + "Rejecting command\n", + cmnd->cmnd[0], scsi_get_prot_op(cmnd), + dif_op_str[scsi_get_prot_op(cmnd)]); + goto out_fail_command; + } + /* * Catch race where our node has transitioned, but the * transport is still transitioning. @@ -1348,12 +2334,13 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0); goto out_fail_command; } - if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) + if (vport->cfg_max_scsicmpl_time && + (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)) goto out_host_busy; lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd == NULL) { - lpfc_adjust_queue_depth(phba); + lpfc_rampdown_queue_depth(phba); lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, "0707 driver's buffer pool is empty, " @@ -1361,7 +2348,6 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) goto out_host_busy; } - lpfc_cmd->start_time = jiffies; /* * Store the midlayer's command structure for the completion phase * and complete the command initialization. @@ -1373,7 +2359,65 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) cmnd->host_scribble = (unsigned char *)lpfc_cmd; cmnd->scsi_done = done; - err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); + if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9033 BLKGRD: rcvd protected cmd:%02x op:%02x " + "str=%s\n", + cmnd->cmnd[0], scsi_get_prot_op(cmnd), + dif_op_str[scsi_get_prot_op(cmnd)]); + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x " + "%02x %02x %02x %02x %02x \n", + cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2], + cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5], + cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8], + cmnd->cmnd[9]); + if (cmnd->cmnd[0] == READ_10) + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9035 BLKGRD: READ @ sector %llu, " + "count %lu\n", + (unsigned long long)scsi_get_lba(cmnd), + cmnd->request->nr_sectors); + else if (cmnd->cmnd[0] == WRITE_10) + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9036 BLKGRD: WRITE @ sector %llu, " + "count %lu cmd=%p\n", + (unsigned long long)scsi_get_lba(cmnd), + cmnd->request->nr_sectors, + cmnd); + + err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd); + } else { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9038 BLKGRD: rcvd unprotected cmd:%02x op:%02x" + " str=%s\n", + cmnd->cmnd[0], scsi_get_prot_op(cmnd), + dif_op_str[scsi_get_prot_op(cmnd)]); + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9039 BLKGRD: CDB: %02x %02x %02x %02x %02x " + "%02x %02x %02x %02x %02x \n", + cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2], + cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5], + cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8], + cmnd->cmnd[9]); + if (cmnd->cmnd[0] == READ_10) + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9040 dbg: READ @ sector %llu, " + "count %lu\n", + (unsigned long long)scsi_get_lba(cmnd), + cmnd->request->nr_sectors); + else if (cmnd->cmnd[0] == WRITE_10) + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9041 dbg: WRITE @ sector %llu, " + "count %lu cmd=%p\n", + (unsigned long long)scsi_get_lba(cmnd), + cmnd->request->nr_sectors, cmnd); + else + lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG, + "9042 dbg: parser not implemented\n"); + err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); + } + if (err) goto out_host_busy_free_buf; @@ -1382,9 +2426,10 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) atomic_inc(&ndlp->cmd_pending); err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring], &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); - if (err) + if (err) { + atomic_dec(&ndlp->cmd_pending); goto out_host_busy_free_buf; - + } if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { lpfc_sli_poll_fcp_ring(phba); if (phba->cfg_poll & DISABLE_FCP_RING_INT) @@ -1394,7 +2439,6 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) return 0; out_host_busy_free_buf: - atomic_dec(&ndlp->cmd_pending); lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); lpfc_release_scsi_buf(phba, lpfc_cmd); out_host_busy: @@ -1405,6 +2449,12 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) return 0; } +/** + * lpfc_block_error_handler: Routine to block error handler. + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine blocks execution till fc_rport state is not FC_PORSTAT_BLCOEKD. + **/ static void lpfc_block_error_handler(struct scsi_cmnd *cmnd) { @@ -1421,6 +2471,17 @@ lpfc_block_error_handler(struct scsi_cmnd *cmnd) return; } +/** + * lpfc_abort_handler: Eh_abort_handler entry point of Scsi Host Template data + *structure. + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine aborts @cmnd pending in base driver. + * + * Return code : + * 0x2003 - Error + * 0x2002 - Success + **/ static int lpfc_abort_handler(struct scsi_cmnd *cmnd) { @@ -1516,6 +2577,18 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd) return ret; } +/** + * lpfc_device_reset_handler: eh_device_reset entry point of Scsi Host Template + *data structure. + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine does a device reset by sending a TARGET_RESET task management + * command. + * + * Return code : + * 0x2003 - Error + * 0ex2002 - Success + **/ static int lpfc_device_reset_handler(struct scsi_cmnd *cmnd) { @@ -1560,7 +2633,7 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd) fc_get_event_number(), sizeof(scsi_event), (char *)&scsi_event, - SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX); + LPFC_NL_VENDOR_ID); if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, @@ -1633,6 +2706,17 @@ lpfc_device_reset_handler(struct scsi_cmnd *cmnd) return ret; } +/** + * lpfc_bus_reset_handler: eh_bus_reset_handler entry point of Scsi Host + * Template data structure. + * @cmnd: Pointer to scsi_cmnd data structure. + * + * This routine does target reset to all target on @cmnd->device->host. + * + * Return Code: + * 0x2003 - Error + * 0x2002 - Success + **/ static int lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) { @@ -1657,7 +2741,7 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) fc_get_event_number(), sizeof(scsi_event), (char *)&scsi_event, - SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX); + LPFC_NL_VENDOR_ID); lpfc_block_error_handler(cmnd); /* @@ -1723,6 +2807,20 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd) return ret; } +/** + * lpfc_slave_alloc: slave_alloc entry point of Scsi Host Template data + * structure. + * @sdev: Pointer to scsi_device. + * + * This routine populates the cmds_per_lun count + 2 scsi_bufs into this host's + * globally available list of scsi buffers. This routine also makes sure scsi + * buffer is not allocated more than HBA limit conveyed to midlayer. This list + * of scsi buffer exists for the lifetime of the driver. + * + * Return codes: + * non-0 - Error + * 0 - Success + **/ static int lpfc_slave_alloc(struct scsi_device *sdev) { @@ -1784,6 +2882,19 @@ lpfc_slave_alloc(struct scsi_device *sdev) return 0; } +/** + * lpfc_slave_configure: slave_configure entry point of Scsi Host Templater data + * structure. + * @sdev: Pointer to scsi_device. + * + * This routine configures following items + * - Tag command queuing support for @sdev if supported. + * - Dev loss time out value of fc_rport. + * - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set. + * + * Return codes: + * 0 - Success + **/ static int lpfc_slave_configure(struct scsi_device *sdev) { @@ -1813,6 +2924,12 @@ lpfc_slave_configure(struct scsi_device *sdev) return 0; } +/** + * lpfc_slave_destroy: slave_destroy entry point of SHT data structure. + * @sdev: Pointer to scsi_device. + * + * This routine sets @sdev hostatdata filed to null. + **/ static void lpfc_slave_destroy(struct scsi_device *sdev) { |