diff options
Diffstat (limited to 'drivers/scsi')
27 files changed, 1680 insertions, 130 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 16570aa..d3d18e8 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -662,6 +662,13 @@ config VMWARE_PVSCSI To compile this driver as a module, choose M here: the module will be called vmw_pvscsi. +config HYPERV_STORAGE + tristate "Microsoft Hyper-V virtual storage driver" + depends on SCSI && HYPERV + default HYPERV + help + Select this option to enable the Hyper-V virtual storage driver. + config LIBFC tristate "LibFC module" select SCSI_FC_ATTRS diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 2b88749..e4c1a69 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -142,6 +142,7 @@ obj-$(CONFIG_SCSI_BNX2_ISCSI) += libiscsi.o bnx2i/ obj-$(CONFIG_BE2ISCSI) += libiscsi.o be2iscsi/ obj-$(CONFIG_SCSI_PMCRAID) += pmcraid.o obj-$(CONFIG_VMWARE_PVSCSI) += vmw_pvscsi.o +obj-$(CONFIG_HYPERV_STORAGE) += hv_storvsc.o obj-$(CONFIG_ARM) += arm/ @@ -170,6 +171,8 @@ scsi_mod-$(CONFIG_SCSI_PROC_FS) += scsi_proc.o scsi_mod-y += scsi_trace.o scsi_mod-$(CONFIG_PM) += scsi_pm.o +hv_storvsc-y := storvsc_drv.o + scsi_tgt-y += scsi_tgt_lib.o scsi_tgt_if.o sd_mod-objs := sd.o diff --git a/drivers/scsi/bnx2fc/bnx2fc_constants.h b/drivers/scsi/bnx2fc/bnx2fc_constants.h index 399cda0..c12702b 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_constants.h +++ b/drivers/scsi/bnx2fc/bnx2fc_constants.h @@ -7,7 +7,7 @@ /* Current FCoE HSI version number composed of two fields (16 bit) */ /* Implies on a change broken previous HSI */ -#define FCOE_HSI_MAJOR_VERSION (1) +#define FCOE_HSI_MAJOR_VERSION (2) /* Implies on a change which does not broken previous HSI */ #define FCOE_HSI_MINOR_VERSION (1) diff --git a/drivers/scsi/bnx2fc/bnx2fc_hwi.c b/drivers/scsi/bnx2fc/bnx2fc_hwi.c index 1923a25..afd5709 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_hwi.c +++ b/drivers/scsi/bnx2fc/bnx2fc_hwi.c @@ -1716,15 +1716,19 @@ void bnx2fc_init_task(struct bnx2fc_cmd *io_req, /* Tx only */ bd_count = bd_tbl->bd_valid; + cached_sge = &task->rxwr_only.union_ctx.read_info.sgl_ctx.cached_sge; if (task_type == FCOE_TASK_TYPE_WRITE) { if ((dev_type == TYPE_DISK) && (bd_count == 1)) { struct fcoe_bd_ctx *fcoe_bd_tbl = bd_tbl->bd_tbl; task->txwr_only.sgl_ctx.cached_sge.cur_buf_addr.lo = + cached_sge->cur_buf_addr.lo = fcoe_bd_tbl->buf_addr_lo; task->txwr_only.sgl_ctx.cached_sge.cur_buf_addr.hi = + cached_sge->cur_buf_addr.hi = fcoe_bd_tbl->buf_addr_hi; task->txwr_only.sgl_ctx.cached_sge.cur_buf_rem = + cached_sge->cur_buf_rem = fcoe_bd_tbl->buf_len; task->txwr_rxrd.const_ctx.init_flags |= 1 << @@ -1790,11 +1794,13 @@ void bnx2fc_init_task(struct bnx2fc_cmd *io_req, task->rxwr_txrd.var_ctx.rx_id = 0xffff; /* Rx Only */ - cached_sge = &task->rxwr_only.union_ctx.read_info.sgl_ctx.cached_sge; + if (task_type != FCOE_TASK_TYPE_READ) + return; + sgl = &task->rxwr_only.union_ctx.read_info.sgl_ctx.sgl; bd_count = bd_tbl->bd_valid; - if (task_type == FCOE_TASK_TYPE_READ && - dev_type == TYPE_DISK) { + + if (dev_type == TYPE_DISK) { if (bd_count == 1) { struct fcoe_bd_ctx *fcoe_bd_tbl = bd_tbl->bd_tbl; diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c index 53a31c7..20c4557 100644 --- a/drivers/scsi/device_handler/scsi_dh_rdac.c +++ b/drivers/scsi/device_handler/scsi_dh_rdac.c @@ -364,10 +364,7 @@ static void release_controller(struct kref *kref) struct rdac_controller *ctlr; ctlr = container_of(kref, struct rdac_controller, kref); - flush_workqueue(kmpath_rdacd); - spin_lock(&list_lock); list_del(&ctlr->node); - spin_unlock(&list_lock); kfree(ctlr); } @@ -376,20 +373,17 @@ static struct rdac_controller *get_controller(int index, char *array_name, { struct rdac_controller *ctlr, *tmp; - spin_lock(&list_lock); - list_for_each_entry(tmp, &ctlr_list, node) { if ((memcmp(tmp->array_id, array_id, UNIQUE_ID_LEN) == 0) && (tmp->index == index) && (tmp->host == sdev->host)) { kref_get(&tmp->kref); - spin_unlock(&list_lock); return tmp; } } ctlr = kmalloc(sizeof(*ctlr), GFP_ATOMIC); if (!ctlr) - goto done; + return NULL; /* initialize fields of controller */ memcpy(ctlr->array_id, array_id, UNIQUE_ID_LEN); @@ -405,8 +399,7 @@ static struct rdac_controller *get_controller(int index, char *array_name, INIT_WORK(&ctlr->ms_work, send_mode_select); INIT_LIST_HEAD(&ctlr->ms_head); list_add(&ctlr->node, &ctlr_list); -done: - spin_unlock(&list_lock); + return ctlr; } @@ -517,9 +510,12 @@ static int initialize_controller(struct scsi_device *sdev, index = 0; else index = 1; + + spin_lock(&list_lock); h->ctlr = get_controller(index, array_name, array_id, sdev); if (!h->ctlr) err = SCSI_DH_RES_TEMP_UNAVAIL; + spin_unlock(&list_lock); } return err; } @@ -906,7 +902,9 @@ static int rdac_bus_attach(struct scsi_device *sdev) return 0; clean_ctlr: + spin_lock(&list_lock); kref_put(&h->ctlr->kref, release_controller); + spin_unlock(&list_lock); failed: kfree(scsi_dh_data); @@ -921,14 +919,19 @@ static void rdac_bus_detach( struct scsi_device *sdev ) struct rdac_dh_data *h; unsigned long flags; - spin_lock_irqsave(sdev->request_queue->queue_lock, flags); scsi_dh_data = sdev->scsi_dh_data; + h = (struct rdac_dh_data *) scsi_dh_data->buf; + if (h->ctlr && h->ctlr->ms_queued) + flush_workqueue(kmpath_rdacd); + + spin_lock_irqsave(sdev->request_queue->queue_lock, flags); sdev->scsi_dh_data = NULL; spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); - h = (struct rdac_dh_data *) scsi_dh_data->buf; + spin_lock(&list_lock); if (h->ctlr) kref_put(&h->ctlr->kref, release_controller); + spin_unlock(&list_lock); kfree(scsi_dh_data); module_put(THIS_MODULE); sdev_printk(KERN_NOTICE, sdev, "%s: Detached\n", RDAC_NAME); diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index e959960..c164890 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -1498,7 +1498,7 @@ static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) /* crc offload */ if (likely(lport->crc_offload)) { - skb->ip_summed = CHECKSUM_PARTIAL; + skb->ip_summed = CHECKSUM_UNNECESSARY; skb->csum_start = skb_headroom(skb); skb->csum_offset = skb->len; crc = 0; diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 67b169b..b538f08 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -4613,11 +4613,13 @@ static int __ipr_eh_host_reset(struct scsi_cmnd * scsi_cmd) ENTER; ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata; - dev_err(&ioa_cfg->pdev->dev, - "Adapter being reset as a result of error recovery.\n"); + if (!ioa_cfg->in_reset_reload) { + dev_err(&ioa_cfg->pdev->dev, + "Adapter being reset as a result of error recovery.\n"); - if (WAIT_FOR_DUMP == ioa_cfg->sdt_state) - ioa_cfg->sdt_state = GET_DUMP; + if (WAIT_FOR_DUMP == ioa_cfg->sdt_state) + ioa_cfg->sdt_state = GET_DUMP; + } rc = ipr_reset_reload(ioa_cfg, IPR_SHUTDOWN_ABBREV); @@ -4907,7 +4909,7 @@ static int ipr_cancel_op(struct scsi_cmnd * scsi_cmd) struct ipr_ioa_cfg *ioa_cfg; struct ipr_resource_entry *res; struct ipr_cmd_pkt *cmd_pkt; - u32 ioasc; + u32 ioasc, int_reg; int op_found = 0; ENTER; @@ -4920,7 +4922,17 @@ static int ipr_cancel_op(struct scsi_cmnd * scsi_cmd) */ if (ioa_cfg->in_reset_reload || ioa_cfg->ioa_is_dead) return FAILED; - if (!res || !ipr_is_gscsi(res)) + if (!res) + return FAILED; + + /* + * If we are aborting a timed out op, chances are that the timeout was caused + * by a still not detected EEH error. In such cases, reading a register will + * trigger the EEH recovery infrastructure. + */ + int_reg = readl(ioa_cfg->regs.sense_interrupt_reg); + + if (!ipr_is_gscsi(res)) return FAILED; list_for_each_entry(ipr_cmd, &ioa_cfg->pending_q, queue) { diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c index 0061cfd..6ca9b26 100644 --- a/drivers/scsi/isci/host.c +++ b/drivers/scsi/isci/host.c @@ -1847,9 +1847,11 @@ static enum sci_status sci_oem_parameters_set(struct isci_host *ihost) if (state == SCIC_RESET || state == SCIC_INITIALIZING || state == SCIC_INITIALIZED) { + u8 oem_version = pci_info->orom ? pci_info->orom->hdr.version : + ISCI_ROM_VER_1_0; if (sci_oem_parameters_validate(&ihost->oem_parameters, - pci_info->orom->hdr.version)) + oem_version)) return SCI_FAILURE_INVALID_PARAMETER_VALUE; return SCI_SUCCESS; diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c index 0b2c955..a78036f 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.c +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c @@ -4548,7 +4548,7 @@ mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag, printk(MPT2SAS_ERR_FMT "%s: pci error recovery reset\n", ioc->name, __func__); r = 0; - goto out; + goto out_unlocked; } if (mpt2sas_fwfault_debug) @@ -4604,6 +4604,7 @@ mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag, spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags); mutex_unlock(&ioc->reset_in_progress_mutex); + out_unlocked: dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: exit\n", ioc->name, __func__)); return r; diff --git a/drivers/scsi/osd/osd_uld.c b/drivers/scsi/osd/osd_uld.c index b31a8e3..d4ed9eb 100644 --- a/drivers/scsi/osd/osd_uld.c +++ b/drivers/scsi/osd/osd_uld.c @@ -69,10 +69,10 @@ #ifndef SCSI_OSD_MAJOR # define SCSI_OSD_MAJOR 260 #endif -#define SCSI_OSD_MAX_MINOR 64 +#define SCSI_OSD_MAX_MINOR MINORMASK static const char osd_name[] = "osd"; -static const char *osd_version_string = "open-osd 0.2.0"; +static const char *osd_version_string = "open-osd 0.2.1"; MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>"); MODULE_DESCRIPTION("open-osd Upper-Layer-Driver osd.ko"); diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c index a2f1b30..9f41b3b 100644 --- a/drivers/scsi/qla2xxx/qla_attr.c +++ b/drivers/scsi/qla2xxx/qla_attr.c @@ -1036,8 +1036,7 @@ qla2x00_link_state_show(struct device *dev, struct device_attribute *attr, vha->device_flags & DFLG_NO_CABLE) len = snprintf(buf, PAGE_SIZE, "Link Down\n"); else if (atomic_read(&vha->loop_state) != LOOP_READY || - test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags)) + qla2x00_reset_active(vha)) len = snprintf(buf, PAGE_SIZE, "Unknown Link State\n"); else { len = snprintf(buf, PAGE_SIZE, "Link Up - "); @@ -1359,8 +1358,7 @@ qla2x00_thermal_temp_show(struct device *dev, return snprintf(buf, PAGE_SIZE, "\n"); temp = frac = 0; - if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags)) + if (qla2x00_reset_active(vha)) ql_log(ql_log_warn, vha, 0x707b, "ISP reset active.\n"); else if (!vha->hw->flags.eeh_busy) @@ -1379,8 +1377,7 @@ qla2x00_fw_state_show(struct device *dev, struct device_attribute *attr, int rval = QLA_FUNCTION_FAILED; uint16_t state[5]; - if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags)) + if (qla2x00_reset_active(vha)) ql_log(ql_log_warn, vha, 0x707c, "ISP reset active.\n"); else if (!vha->hw->flags.eeh_busy) @@ -1693,9 +1690,7 @@ qla2x00_get_fc_host_stats(struct Scsi_Host *shost) if (IS_FWI2_CAPABLE(ha)) { rval = qla24xx_get_isp_stats(base_vha, stats, stats_dma); } else if (atomic_read(&base_vha->loop_state) == LOOP_READY && - !test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) && - !test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) && - !ha->dpc_active) { + !qla2x00_reset_active(vha) && !ha->dpc_active) { /* Must be in a 'READY' state for statistics retrieval. */ rval = qla2x00_get_link_status(base_vha, base_vha->loop_id, stats, stats_dma); diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c index a1c6a16..2c47142 100644 --- a/drivers/scsi/qla2xxx/qla_bsg.c +++ b/drivers/scsi/qla2xxx/qla_bsg.c @@ -108,13 +108,6 @@ qla24xx_proc_fcp_prio_cfg_cmd(struct fc_bsg_job *bsg_job) goto exit_fcp_prio_cfg; } - if (test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) || - test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) { - ret = -EBUSY; - goto exit_fcp_prio_cfg; - } - /* Get the sub command */ oper = bsg_job->request->rqst_data.h_vendor.vendor_cmd[1]; @@ -646,13 +639,6 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job) dma_addr_t rsp_data_dma; uint32_t rsp_data_len; - if (test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) || - test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) { - ql_log(ql_log_warn, vha, 0x7018, "Abort active or needed.\n"); - return -EBUSY; - } - if (!vha->flags.online) { ql_log(ql_log_warn, vha, 0x7019, "Host is not online.\n"); return -EIO; @@ -874,13 +860,6 @@ qla84xx_reset(struct fc_bsg_job *bsg_job) int rval = 0; uint32_t flag; - if (test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) || - test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) { - ql_log(ql_log_warn, vha, 0x702e, "Abort active or needed.\n"); - return -EBUSY; - } - if (!IS_QLA84XX(ha)) { ql_dbg(ql_dbg_user, vha, 0x702f, "Not 84xx, exiting.\n"); return -EINVAL; @@ -922,11 +901,6 @@ qla84xx_updatefw(struct fc_bsg_job *bsg_job) uint32_t flag; uint32_t fw_ver; - if (test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) || - test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) - return -EBUSY; - if (!IS_QLA84XX(ha)) { ql_dbg(ql_dbg_user, vha, 0x7032, "Not 84xx, exiting.\n"); @@ -1036,14 +1010,6 @@ qla84xx_mgmt_cmd(struct fc_bsg_job *bsg_job) uint32_t data_len = 0; uint32_t dma_direction = DMA_NONE; - if (test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) || - test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) { - ql_log(ql_log_warn, vha, 0x7039, - "Abort active or needed.\n"); - return -EBUSY; - } - if (!IS_QLA84XX(ha)) { ql_log(ql_log_warn, vha, 0x703a, "Not 84xx, exiting.\n"); @@ -1246,13 +1212,6 @@ qla24xx_iidma(struct fc_bsg_job *bsg_job) bsg_job->reply->reply_payload_rcv_len = 0; - if (test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) || - test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) || - test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) { - ql_log(ql_log_warn, vha, 0x7045, "abort active or needed.\n"); - return -EBUSY; - } - if (!IS_IIDMA_CAPABLE(vha->hw)) { ql_log(ql_log_info, vha, 0x7046, "iiDMA not supported.\n"); return -EINVAL; @@ -1668,6 +1627,15 @@ qla24xx_bsg_request(struct fc_bsg_job *bsg_job) vha = shost_priv(host); } + if (qla2x00_reset_active(vha)) { + ql_dbg(ql_dbg_user, vha, 0x709f, + "BSG: ISP abort active/needed -- cmd=%d.\n", + bsg_job->request->msgcode); + bsg_job->reply->result = (DID_ERROR << 16); + bsg_job->job_done(bsg_job); + return -EBUSY; + } + ql_dbg(ql_dbg_user, vha, 0x7000, "Entered %s msgcode=0x%x.\n", __func__, bsg_job->request->msgcode); diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c index 7c54624..45cbf0b 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.c +++ b/drivers/scsi/qla2xxx/qla_dbg.c @@ -19,7 +19,8 @@ * | DPC Thread | 0x401c | | * | Async Events | 0x5057 | 0x5052 | * | Timer Routines | 0x6011 | 0x600e,0x600f | - * | User Space Interactions | 0x709e | | + * | User Space Interactions | 0x709e | 0x7018,0x702e | + * | | | 0x7039,0x7045 | * | Task Management | 0x803c | 0x8025-0x8026 | * | | | 0x800b,0x8039 | * | AER/EEH | 0x900f | | diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index a6a4eeb..af1003f 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -44,6 +44,7 @@ * ISP2100 HBAs. */ #define MAILBOX_REGISTER_COUNT_2100 8 +#define MAILBOX_REGISTER_COUNT_2200 24 #define MAILBOX_REGISTER_COUNT 32 #define QLA2200A_RISC_ROM_VER 4 diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h index 9902834..7cc4f36 100644 --- a/drivers/scsi/qla2xxx/qla_inline.h +++ b/drivers/scsi/qla2xxx/qla_inline.h @@ -131,3 +131,16 @@ qla2x00_hba_err_chk_enabled(srb_t *sp) } return 0; } + +static inline int +qla2x00_reset_active(scsi_qla_host_t *vha) +{ + scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev); + + /* Test appropriate base-vha and vha flags. */ + return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) || + test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) || + test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) || + test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) || + test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags); +} diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index e804585..349843e 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -2090,7 +2090,6 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha, break; case CT_IOCB_TYPE: qla24xx_els_ct_entry(vha, rsp->req, pkt, CT_IOCB_TYPE); - clear_bit(MBX_INTERRUPT, &vha->hw->mbx_cmd_flags); break; case ELS_IOCB_TYPE: qla24xx_els_ct_entry(vha, rsp->req, pkt, ELS_IOCB_TYPE); diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c index 34344d3..08f1d01 100644 --- a/drivers/scsi/qla2xxx/qla_mbx.c +++ b/drivers/scsi/qla2xxx/qla_mbx.c @@ -342,6 +342,8 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp) set_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags); clear_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); + /* Allow next mbx cmd to come in. */ + complete(&ha->mbx_cmd_comp); if (ha->isp_ops->abort_isp(vha)) { /* Failed. retry later. */ set_bit(ISP_ABORT_NEEDED, @@ -350,6 +352,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp) clear_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags); ql_dbg(ql_dbg_mbx, base_vha, 0x101f, "Finished abort_isp.\n"); + goto mbx_done; } } } @@ -358,6 +361,7 @@ premature_exit: /* Allow next mbx cmd to come in. */ complete(&ha->mbx_cmd_comp); +mbx_done: if (rval) { ql_dbg(ql_dbg_mbx, base_vha, 0x1020, "**** Failed mbx[0]=%x, mb[1]=%x, mb[2]=%x, cmd=%x ****.\n", @@ -2581,7 +2585,8 @@ qla2x00_stop_firmware(scsi_qla_host_t *vha) ql_dbg(ql_dbg_mbx, vha, 0x10a1, "Entered %s.\n", __func__); mcp->mb[0] = MBC_STOP_FIRMWARE; - mcp->out_mb = MBX_0; + mcp->mb[1] = 0; + mcp->out_mb = MBX_1|MBX_0; mcp->in_mb = MBX_0; mcp->tov = 5; mcp->flags = 0; diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c index 1cd46cd..270ba31 100644 --- a/drivers/scsi/qla2xxx/qla_nx.c +++ b/drivers/scsi/qla2xxx/qla_nx.c @@ -1165,19 +1165,6 @@ qla82xx_pinit_from_rom(scsi_qla_host_t *vha) qla82xx_wr_32(ha, QLA82XX_ROMUSB_GLB_SW_RESET, 0xfeffffff); else qla82xx_wr_32(ha, QLA82XX_ROMUSB_GLB_SW_RESET, 0xffffffff); - - /* reset ms */ - val = qla82xx_rd_32(ha, QLA82XX_CRB_QDR_NET + 0xe4); - val |= (1 << 1); - qla82xx_wr_32(ha, QLA82XX_CRB_QDR_NET + 0xe4, val); - msleep(20); - - /* unreset ms */ - val = qla82xx_rd_32(ha, QLA82XX_CRB_QDR_NET + 0xe4); - val &= ~(1 << 1); - qla82xx_wr_32(ha, QLA82XX_CRB_QDR_NET + 0xe4, val); - msleep(20); - qla82xx_rom_unlock(ha); /* Read the signature value from the flash. @@ -3392,7 +3379,7 @@ void qla82xx_watchdog(scsi_qla_host_t *vha) QLA82XX_CRB_PEG_NET_3 + 0x3c), qla82xx_rd_32(ha, QLA82XX_CRB_PEG_NET_4 + 0x3c)); - if (LSW(MSB(halt_status)) == 0x67) + if (((halt_status & 0x1fffff00) >> 8) == 0x67) ql_log(ql_log_warn, vha, 0xb052, "Firmware aborted with " "error code 0x00006700. Device is " diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index 4ed1e4a..036030c 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -625,6 +625,12 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) cmd->result = DID_NO_CONNECT << 16; goto qc24_fail_command; } + + if (!fcport) { + cmd->result = DID_NO_CONNECT << 16; + goto qc24_fail_command; + } + if (atomic_read(&fcport->state) != FCS_ONLINE) { if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD || atomic_read(&base_vha->loop_state) == LOOP_DEAD) { @@ -877,6 +883,7 @@ qla2xxx_eh_abort(struct scsi_cmnd *cmd) spin_unlock_irqrestore(&ha->hardware_lock, flags); if (ha->isp_ops->abort_command(sp)) { + ret = FAILED; ql_dbg(ql_dbg_taskm, vha, 0x8003, "Abort command mbx failed cmd=%p.\n", cmd); } else { @@ -1124,7 +1131,6 @@ static int qla2xxx_eh_host_reset(struct scsi_cmnd *cmd) { scsi_qla_host_t *vha = shost_priv(cmd->device->host); - fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata; struct qla_hw_data *ha = vha->hw; int ret = FAILED; unsigned int id, lun; @@ -1133,15 +1139,6 @@ qla2xxx_eh_host_reset(struct scsi_cmnd *cmd) id = cmd->device->id; lun = cmd->device->lun; - if (!fcport) { - return ret; - } - - ret = fc_block_scsi_eh(cmd); - if (ret != 0) - return ret; - ret = FAILED; - ql_log(ql_log_info, vha, 0x8018, "ADAPTER RESET ISSUED nexus=%ld:%d:%d.\n", vha->host_no, id, lun); @@ -2047,7 +2044,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) ha->nvram_data_off = ~0; ha->isp_ops = &qla2100_isp_ops; } else if (IS_QLA2200(ha)) { - ha->mbx_count = MAILBOX_REGISTER_COUNT; + ha->mbx_count = MAILBOX_REGISTER_COUNT_2200; req_length = REQUEST_ENTRY_CNT_2200; rsp_length = RESPONSE_ENTRY_CNT_2100; ha->max_loop_id = SNS_LAST_LOOP_ID_2100; diff --git a/drivers/scsi/qla2xxx/qla_version.h b/drivers/scsi/qla2xxx/qla_version.h index 23f33a6..29d780c 100644 --- a/drivers/scsi/qla2xxx/qla_version.h +++ b/drivers/scsi/qla2xxx/qla_version.h @@ -7,7 +7,7 @@ /* * Driver version */ -#define QLA2XXX_VERSION "8.03.07.12-k" +#define QLA2XXX_VERSION "8.03.07.13-k" #define QLA_DRIVER_MAJOR_VER 8 #define QLA_DRIVER_MINOR_VER 3 diff --git a/drivers/scsi/qla4xxx/ql4_nx.c b/drivers/scsi/qla4xxx/ql4_nx.c index 78f1111..65253df 100644 --- a/drivers/scsi/qla4xxx/ql4_nx.c +++ b/drivers/scsi/qla4xxx/ql4_nx.c @@ -10,6 +10,8 @@ #include "ql4_def.h" #include "ql4_glbl.h" +#include <asm-generic/io-64-nonatomic-lo-hi.h> + #define MASK(n) DMA_BIT_MASK(n) #define MN_WIN(addr) (((addr & 0x1fc0000) >> 1) | ((addr >> 25) & 0x3ff)) #define OCM_WIN(addr) (((addr & 0x1ff0000) >> 1) | ((addr >> 25) & 0x3ff)) @@ -655,27 +657,6 @@ static int qla4_8xxx_pci_is_same_window(struct scsi_qla_host *ha, return 0; } -#ifndef readq -static inline __u64 readq(const volatile void __iomem *addr) -{ - const volatile u32 __iomem *p = addr; - u32 low, high; - - low = readl(p); - high = readl(p + 1); - - return low + ((u64)high << 32); -} -#endif - -#ifndef writeq -static inline void writeq(__u64 val, volatile void __iomem *addr) -{ - writel(val, addr); - writel(val >> 32, addr+4); -} -#endif - static int qla4_8xxx_pci_mem_read_direct(struct scsi_qla_host *ha, u64 off, void *data, int size) { diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c index bf8bf79..c467064 100644 --- a/drivers/scsi/scsi_pm.c +++ b/drivers/scsi/scsi_pm.c @@ -7,6 +7,7 @@ #include <linux/pm_runtime.h> #include <linux/export.h> +#include <linux/async.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> @@ -92,6 +93,19 @@ static int scsi_bus_resume_common(struct device *dev) return err; } +static int scsi_bus_prepare(struct device *dev) +{ + if (scsi_is_sdev_device(dev)) { + /* sd probing uses async_schedule. Wait until it finishes. */ + async_synchronize_full(); + + } else if (scsi_is_host_device(dev)) { + /* Wait until async scanning is finished */ + scsi_complete_async_scans(); + } + return 0; +} + static int scsi_bus_suspend(struct device *dev) { return scsi_bus_suspend_common(dev, PMSG_SUSPEND); @@ -110,6 +124,7 @@ static int scsi_bus_poweroff(struct device *dev) #else /* CONFIG_PM_SLEEP */ #define scsi_bus_resume_common NULL +#define scsi_bus_prepare NULL #define scsi_bus_suspend NULL #define scsi_bus_freeze NULL #define scsi_bus_poweroff NULL @@ -218,6 +233,7 @@ void scsi_autopm_put_host(struct Scsi_Host *shost) #endif /* CONFIG_PM_RUNTIME */ const struct dev_pm_ops scsi_bus_pm_ops = { + .prepare = scsi_bus_prepare, .suspend = scsi_bus_suspend, .resume = scsi_bus_resume_common, .freeze = scsi_bus_freeze, diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h index 68eadd1..be4fa6d 100644 --- a/drivers/scsi/scsi_priv.h +++ b/drivers/scsi/scsi_priv.h @@ -109,6 +109,7 @@ extern void scsi_exit_procfs(void); #endif /* CONFIG_PROC_FS */ /* scsi_scan.c */ +extern int scsi_complete_async_scans(void); extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int, unsigned int, unsigned int, int); extern void scsi_forget_host(struct Scsi_Host *); diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 89da43f..01b0374 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -1295,6 +1295,7 @@ EXPORT_SYMBOL(int_to_scsilun); * LUNs even if it's older than SCSI-3. * If BLIST_NOREPORTLUN is set, return 1 always. * If BLIST_NOLUN is set, return 0 always. + * If starget->no_report_luns is set, return 1 always. * * Return: * 0: scan completed (or no memory, so further scanning is futile) @@ -1321,6 +1322,7 @@ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags, * Only support SCSI-3 and up devices if BLIST_NOREPORTLUN is not set. * Also allow SCSI-2 if BLIST_REPORTLUN2 is set and host adapter does * support more than 8 LUNs. + * Don't attempt if the target doesn't support REPORT LUNS. */ if (bflags & BLIST_NOREPORTLUN) return 1; @@ -1332,6 +1334,8 @@ static int scsi_report_lun_scan(struct scsi_target *starget, int bflags, return 1; if (bflags & BLIST_NOLUN) return 0; + if (starget->no_report_luns) + return 1; if (!(sdev = scsi_device_lookup_by_target(starget, 0))) { sdev = scsi_alloc_sdev(starget, 0, NULL); @@ -1815,6 +1819,7 @@ static void scsi_finish_async_scan(struct async_scan_data *data) } spin_unlock(&async_scan_lock); + scsi_autopm_put_host(shost); scsi_host_put(shost); kfree(data); } @@ -1841,7 +1846,6 @@ static int do_scan_async(void *_data) do_scsi_scan_host(shost); scsi_finish_async_scan(data); - scsi_autopm_put_host(shost); return 0; } @@ -1869,7 +1873,7 @@ void scsi_scan_host(struct Scsi_Host *shost) p = kthread_run(do_scan_async, data, "scsi_scan_%d", shost->host_no); if (IS_ERR(p)) do_scan_async(data); - /* scsi_autopm_put_host(shost) is called in do_scan_async() */ + /* scsi_autopm_put_host(shost) is called in scsi_finish_async_scan() */ } EXPORT_SYMBOL(scsi_scan_host); diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index c691fb5..d173b90 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2349,7 +2349,7 @@ static int sd_try_extended_inquiry(struct scsi_device *sdp) * some USB ones crash on receiving them, and the pages * we currently ask for are for SPC-3 and beyond */ - if (sdp->scsi_level > SCSI_SPC_2) + if (sdp->scsi_level > SCSI_SPC_2 && !sdp->skip_vpd_pages) return 1; return 0; } diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c index 0cb39ff..f8fb2d6 100644 --- a/drivers/scsi/sd_dif.c +++ b/drivers/scsi/sd_dif.c @@ -408,7 +408,7 @@ int sd_dif_prepare(struct request *rq, sector_t hw_sector, unsigned int sector_s kunmap_atomic(sdt, KM_USER0); } - bio->bi_flags |= BIO_MAPPED_INTEGRITY; + bio->bi_flags |= (1 << BIO_MAPPED_INTEGRITY); } return 0; diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c new file mode 100644 index 0000000..695ffc3 --- /dev/null +++ b/drivers/scsi/storvsc_drv.c @@ -0,0 +1,1548 @@ +/* + * Copyright (c) 2009, Microsoft Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + * + * Authors: + * Haiyang Zhang <haiyangz@microsoft.com> + * Hank Janssen <hjanssen@microsoft.com> + * K. Y. Srinivasan <kys@microsoft.com> + */ + +#include <linux/kernel.h> +#include <linux/wait.h> +#include <linux/sched.h> +#include <linux/completion.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/hyperv.h> +#include <linux/mempool.h> +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_devinfo.h> +#include <scsi/scsi_dbg.h> + +/* + * All wire protocol details (storage protocol between the guest and the host) + * are consolidated here. + * + * Begin protocol definitions. + */ + +/* + * Version history: + * V1 Beta: 0.1 + * V1 RC < 2008/1/31: 1.0 + * V1 RC > 2008/1/31: 2.0 + * Win7: 4.2 + */ + +#define VMSTOR_CURRENT_MAJOR 4 +#define VMSTOR_CURRENT_MINOR 2 + + +/* Packet structure describing virtual storage requests. */ +enum vstor_packet_operation { + VSTOR_OPERATION_COMPLETE_IO = 1, + VSTOR_OPERATION_REMOVE_DEVICE = 2, + VSTOR_OPERATION_EXECUTE_SRB = 3, + VSTOR_OPERATION_RESET_LUN = 4, + VSTOR_OPERATION_RESET_ADAPTER = 5, + VSTOR_OPERATION_RESET_BUS = 6, + VSTOR_OPERATION_BEGIN_INITIALIZATION = 7, + VSTOR_OPERATION_END_INITIALIZATION = 8, + VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9, + VSTOR_OPERATION_QUERY_PROPERTIES = 10, + VSTOR_OPERATION_ENUMERATE_BUS = 11, + VSTOR_OPERATION_MAXIMUM = 11 +}; + +/* + * Platform neutral description of a scsi request - + * this remains the same across the write regardless of 32/64 bit + * note: it's patterned off the SCSI_PASS_THROUGH structure + */ +#define STORVSC_MAX_CMD_LEN 0x10 +#define STORVSC_SENSE_BUFFER_SIZE 0x12 +#define STORVSC_MAX_BUF_LEN_WITH_PADDING 0x14 + +struct vmscsi_request { + u16 length; + u8 srb_status; + u8 scsi_status; + + u8 port_number; + u8 path_id; + u8 target_id; + u8 lun; + + u8 cdb_length; + u8 sense_info_length; + u8 data_in; + u8 reserved; + + u32 data_transfer_length; + + union { + u8 cdb[STORVSC_MAX_CMD_LEN]; + u8 sense_data[STORVSC_SENSE_BUFFER_SIZE]; + u8 reserved_array[STORVSC_MAX_BUF_LEN_WITH_PADDING]; + }; +} __attribute((packed)); + + +/* + * This structure is sent during the intialization phase to get the different + * properties of the channel. + */ +struct vmstorage_channel_properties { + u16 protocol_version; + u8 path_id; + u8 target_id; + + /* Note: port number is only really known on the client side */ + u32 port_number; + u32 flags; + u32 max_transfer_bytes; + + /* + * This id is unique for each channel and will correspond with + * vendor specific data in the inquiry data. + */ + + u64 unique_id; +} __packed; + +/* This structure is sent during the storage protocol negotiations. */ +struct vmstorage_protocol_version { + /* Major (MSW) and minor (LSW) version numbers. */ + u16 major_minor; + + /* + * Revision number is auto-incremented whenever this file is changed + * (See FILL_VMSTOR_REVISION macro above). Mismatch does not + * definitely indicate incompatibility--but it does indicate mismatched + * builds. + * This is only used on the windows side. Just set it to 0. + */ + u16 revision; +} __packed; + +/* Channel Property Flags */ +#define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1 +#define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2 + +struct vstor_packet { + /* Requested operation type */ + enum vstor_packet_operation operation; + + /* Flags - see below for values */ + u32 flags; + + /* Status of the request returned from the server side. */ + u32 status; + + /* Data payload area */ + union { + /* + * Structure used to forward SCSI commands from the + * client to the server. + */ + struct vmscsi_request vm_srb; + + /* Structure used to query channel properties. */ + struct vmstorage_channel_properties storage_channel_properties; + + /* Used during version negotiations. */ + struct vmstorage_protocol_version version; + }; +} __packed; + +/* + * Packet Flags: + * + * This flag indicates that the server should send back a completion for this + * packet. + */ + +#define REQUEST_COMPLETION_FLAG 0x1 + +/* Matches Windows-end */ +enum storvsc_request_type { + WRITE_TYPE = 0, + READ_TYPE, + UNKNOWN_TYPE, +}; + +/* + * SRB status codes and masks; a subset of the codes used here. + */ + +#define SRB_STATUS_AUTOSENSE_VALID 0x80 +#define SRB_STATUS_INVALID_LUN 0x20 +#define SRB_STATUS_SUCCESS 0x01 +#define SRB_STATUS_ERROR 0x04 + +/* + * This is the end of Protocol specific defines. + */ + + +/* + * We setup a mempool to allocate request structures for this driver + * on a per-lun basis. The following define specifies the number of + * elements in the pool. + */ + +#define STORVSC_MIN_BUF_NR 64 +static int storvsc_ringbuffer_size = (20 * PAGE_SIZE); + +module_param(storvsc_ringbuffer_size, int, S_IRUGO); +MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)"); + +#define STORVSC_MAX_IO_REQUESTS 128 + +/* + * In Hyper-V, each port/path/target maps to 1 scsi host adapter. In + * reality, the path/target is not used (ie always set to 0) so our + * scsi host adapter essentially has 1 bus with 1 target that contains + * up to 256 luns. + */ +#define STORVSC_MAX_LUNS_PER_TARGET 64 +#define STORVSC_MAX_TARGETS 1 +#define STORVSC_MAX_CHANNELS 1 + + + +struct storvsc_cmd_request { + struct list_head entry; + struct scsi_cmnd *cmd; + + unsigned int bounce_sgl_count; + struct scatterlist *bounce_sgl; + + struct hv_device *device; + + /* Synchronize the request/response if needed */ + struct completion wait_event; + + unsigned char *sense_buffer; + struct hv_multipage_buffer data_buffer; + struct vstor_packet vstor_packet; +}; + + +/* A storvsc device is a device object that contains a vmbus channel */ +struct storvsc_device { + struct hv_device *device; + + bool destroy; + bool drain_notify; + atomic_t num_outstanding_req; + struct Scsi_Host *host; + + wait_queue_head_t waiting_to_drain; + + /* + * Each unique Port/Path/Target represents 1 channel ie scsi + * controller. In reality, the pathid, targetid is always 0 + * and the port is set by us + */ + unsigned int port_number; + unsigned char path_id; + unsigned char target_id; + + /* Used for vsc/vsp channel reset process */ + struct storvsc_cmd_request init_request; + struct storvsc_cmd_request reset_request; +}; + +struct stor_mem_pools { + struct kmem_cache *request_pool; + mempool_t *request_mempool; +}; + +struct hv_host_device { + struct hv_device *dev; + unsigned int port; + unsigned char path; + unsigned char target; +}; + +struct storvsc_scan_work { + struct work_struct work; + struct Scsi_Host *host; + uint lun; +}; + +static void storvsc_bus_scan(struct work_struct *work) +{ + struct storvsc_scan_work *wrk; + int id, order_id; + + wrk = container_of(work, struct storvsc_scan_work, work); + for (id = 0; id < wrk->host->max_id; ++id) { + if (wrk->host->reverse_ordering) + order_id = wrk->host->max_id - id - 1; + else + order_id = id; + + scsi_scan_target(&wrk->host->shost_gendev, 0, + order_id, SCAN_WILD_CARD, 1); + } + kfree(wrk); +} + +static void storvsc_remove_lun(struct work_struct *work) +{ + struct storvsc_scan_work *wrk; + struct scsi_device *sdev; + + wrk = container_of(work, struct storvsc_scan_work, work); + if (!scsi_host_get(wrk->host)) + goto done; + + sdev = scsi_device_lookup(wrk->host, 0, 0, wrk->lun); + + if (sdev) { + scsi_remove_device(sdev); + scsi_device_put(sdev); + } + scsi_host_put(wrk->host); + +done: + kfree(wrk); +} + +/* + * Major/minor macros. Minor version is in LSB, meaning that earlier flat + * version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1). + */ + +static inline u16 storvsc_get_version(u8 major, u8 minor) +{ + u16 version; + + version = ((major << 8) | minor); + return version; +} + +/* + * We can get incoming messages from the host that are not in response to + * messages that we have sent out. An example of this would be messages + * received by the guest to notify dynamic addition/removal of LUNs. To + * deal with potential race conditions where the driver may be in the + * midst of being unloaded when we might receive an unsolicited message + * from the host, we have implemented a mechanism to gurantee sequential + * consistency: + * + * 1) Once the device is marked as being destroyed, we will fail all + * outgoing messages. + * 2) We permit incoming messages when the device is being destroyed, + * only to properly account for messages already sent out. + */ + +static inline struct storvsc_device *get_out_stor_device( + struct hv_device *device) +{ + struct storvsc_device *stor_device; + + stor_device = hv_get_drvdata(device); + + if (stor_device && stor_device->destroy) + stor_device = NULL; + + return stor_device; +} + + +static inline void storvsc_wait_to_drain(struct storvsc_device *dev) +{ + dev->drain_notify = true; + wait_event(dev->waiting_to_drain, + atomic_read(&dev->num_outstanding_req) == 0); + dev->drain_notify = false; +} + +static inline struct storvsc_device *get_in_stor_device( + struct hv_device *device) +{ + struct storvsc_device *stor_device; + + stor_device = hv_get_drvdata(device); + + if (!stor_device) + goto get_in_err; + + /* + * If the device is being destroyed; allow incoming + * traffic only to cleanup outstanding requests. + */ + + if (stor_device->destroy && + (atomic_read(&stor_device->num_outstanding_req) == 0)) + stor_device = NULL; + +get_in_err: + return stor_device; + +} + +static void destroy_bounce_buffer(struct scatterlist *sgl, + unsigned int sg_count) +{ + int i; + struct page *page_buf; + + for (i = 0; i < sg_count; i++) { + page_buf = sg_page((&sgl[i])); + if (page_buf != NULL) + __free_page(page_buf); + } + + kfree(sgl); +} + +static int do_bounce_buffer(struct scatterlist *sgl, unsigned int sg_count) +{ + int i; + + /* No need to check */ + if (sg_count < 2) + return -1; + + /* We have at least 2 sg entries */ + for (i = 0; i < sg_count; i++) { + if (i == 0) { + /* make sure 1st one does not have hole */ + if (sgl[i].offset + sgl[i].length != PAGE_SIZE) + return i; + } else if (i == sg_count - 1) { + /* make sure last one does not have hole */ + if (sgl[i].offset != 0) + return i; + } else { + /* make sure no hole in the middle */ + if (sgl[i].length != PAGE_SIZE || sgl[i].offset != 0) + return i; + } + } + return -1; +} + +static struct scatterlist *create_bounce_buffer(struct scatterlist *sgl, + unsigned int sg_count, + unsigned int len, + int write) +{ + int i; + int num_pages; + struct scatterlist *bounce_sgl; + struct page *page_buf; + unsigned int buf_len = ((write == WRITE_TYPE) ? 0 : PAGE_SIZE); + + num_pages = ALIGN(len, PAGE_SIZE) >> PAGE_SHIFT; + + bounce_sgl = kcalloc(num_pages, sizeof(struct scatterlist), GFP_ATOMIC); + if (!bounce_sgl) + return NULL; + + for (i = 0; i < num_pages; i++) { + page_buf = alloc_page(GFP_ATOMIC); + if (!page_buf) + goto cleanup; + sg_set_page(&bounce_sgl[i], page_buf, buf_len, 0); + } + + return bounce_sgl; + +cleanup: + destroy_bounce_buffer(bounce_sgl, num_pages); + return NULL; +} + +/* Assume the original sgl has enough room */ +static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, + struct scatterlist *bounce_sgl, + unsigned int orig_sgl_count, + unsigned int bounce_sgl_count) +{ + int i; + int j = 0; + unsigned long src, dest; + unsigned int srclen, destlen, copylen; + unsigned int total_copied = 0; + unsigned long bounce_addr = 0; + unsigned long dest_addr = 0; + unsigned long flags; + + local_irq_save(flags); + + for (i = 0; i < orig_sgl_count; i++) { + dest_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])), + KM_IRQ0) + orig_sgl[i].offset; + dest = dest_addr; + destlen = orig_sgl[i].length; + + if (bounce_addr == 0) + bounce_addr = + (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), + KM_IRQ0); + + while (destlen) { + src = bounce_addr + bounce_sgl[j].offset; + srclen = bounce_sgl[j].length - bounce_sgl[j].offset; + + copylen = min(srclen, destlen); + memcpy((void *)dest, (void *)src, copylen); + + total_copied += copylen; + bounce_sgl[j].offset += copylen; + destlen -= copylen; + dest += copylen; + + if (bounce_sgl[j].offset == bounce_sgl[j].length) { + /* full */ + kunmap_atomic((void *)bounce_addr, KM_IRQ0); + j++; + + /* + * It is possible that the number of elements + * in the bounce buffer may not be equal to + * the number of elements in the original + * scatter list. Handle this correctly. + */ + + if (j == bounce_sgl_count) { + /* + * We are done; cleanup and return. + */ + kunmap_atomic((void *)(dest_addr - + orig_sgl[i].offset), + KM_IRQ0); + local_irq_restore(flags); + return total_copied; + } + + /* if we need to use another bounce buffer */ + if (destlen || i != orig_sgl_count - 1) + bounce_addr = + (unsigned long)kmap_atomic( + sg_page((&bounce_sgl[j])), KM_IRQ0); + } else if (destlen == 0 && i == orig_sgl_count - 1) { + /* unmap the last bounce that is < PAGE_SIZE */ + kunmap_atomic((void *)bounce_addr, KM_IRQ0); + } + } + + kunmap_atomic((void *)(dest_addr - orig_sgl[i].offset), + KM_IRQ0); + } + + local_irq_restore(flags); + + return total_copied; +} + +/* Assume the bounce_sgl has enough room ie using the create_bounce_buffer() */ +static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, + struct scatterlist *bounce_sgl, + unsigned int orig_sgl_count) +{ + int i; + int j = 0; + unsigned long src, dest; + unsigned int srclen, destlen, copylen; + unsigned int total_copied = 0; + unsigned long bounce_addr = 0; + unsigned long src_addr = 0; + unsigned long flags; + + local_irq_save(flags); + + for (i = 0; i < orig_sgl_count; i++) { + src_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])), + KM_IRQ0) + orig_sgl[i].offset; + src = src_addr; + srclen = orig_sgl[i].length; + + if (bounce_addr == 0) + bounce_addr = + (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), + KM_IRQ0); + + while (srclen) { + /* assume bounce offset always == 0 */ + dest = bounce_addr + bounce_sgl[j].length; + destlen = PAGE_SIZE - bounce_sgl[j].length; + + copylen = min(srclen, destlen); + memcpy((void *)dest, (void *)src, copylen); + + total_copied += copylen; + bounce_sgl[j].length += copylen; + srclen -= copylen; + src += copylen; + + if (bounce_sgl[j].length == PAGE_SIZE) { + /* full..move to next entry */ + kunmap_atomic((void *)bounce_addr, KM_IRQ0); + j++; + + /* if we need to use another bounce buffer */ + if (srclen || i != orig_sgl_count - 1) + bounce_addr = + (unsigned long)kmap_atomic( + sg_page((&bounce_sgl[j])), KM_IRQ0); + + } else if (srclen == 0 && i == orig_sgl_count - 1) { + /* unmap the last bounce that is < PAGE_SIZE */ + kunmap_atomic((void *)bounce_addr, KM_IRQ0); + } + } + + kunmap_atomic((void *)(src_addr - orig_sgl[i].offset), KM_IRQ0); + } + + local_irq_restore(flags); + + return total_copied; +} + +static int storvsc_channel_init(struct hv_device *device) +{ + struct storvsc_device *stor_device; + struct storvsc_cmd_request *request; + struct vstor_packet *vstor_packet; + int ret, t; + + stor_device = get_out_stor_device(device); + if (!stor_device) + return -ENODEV; + + request = &stor_device->init_request; + vstor_packet = &request->vstor_packet; + + /* + * Now, initiate the vsc/vsp initialization protocol on the open + * channel + */ + memset(request, 0, sizeof(struct storvsc_cmd_request)); + init_completion(&request->wait_event); + vstor_packet->operation = VSTOR_OPERATION_BEGIN_INITIALIZATION; + vstor_packet->flags = REQUEST_COMPLETION_FLAG; + + ret = vmbus_sendpacket(device->channel, vstor_packet, + sizeof(struct vstor_packet), + (unsigned long)request, + VM_PKT_DATA_INBAND, + VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + if (ret != 0) + goto cleanup; + + t = wait_for_completion_timeout(&request->wait_event, 5*HZ); + if (t == 0) { + ret = -ETIMEDOUT; + goto cleanup; + } + + if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || + vstor_packet->status != 0) + goto cleanup; + + + /* reuse the packet for version range supported */ + memset(vstor_packet, 0, sizeof(struct vstor_packet)); + vstor_packet->operation = VSTOR_OPERATION_QUERY_PROTOCOL_VERSION; + vstor_packet->flags = REQUEST_COMPLETION_FLAG; + + vstor_packet->version.major_minor = + storvsc_get_version(VMSTOR_CURRENT_MAJOR, VMSTOR_CURRENT_MINOR); + + /* + * The revision number is only used in Windows; set it to 0. + */ + vstor_packet->version.revision = 0; + + ret = vmbus_sendpacket(device->channel, vstor_packet, + sizeof(struct vstor_packet), + (unsigned long)request, + VM_PKT_DATA_INBAND, + VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + if (ret != 0) + goto cleanup; + + t = wait_for_completion_timeout(&request->wait_event, 5*HZ); + if (t == 0) { + ret = -ETIMEDOUT; + goto cleanup; + } + + if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || + vstor_packet->status != 0) + goto cleanup; + + + memset(vstor_packet, 0, sizeof(struct vstor_packet)); + vstor_packet->operation = VSTOR_OPERATION_QUERY_PROPERTIES; + vstor_packet->flags = REQUEST_COMPLETION_FLAG; + vstor_packet->storage_channel_properties.port_number = + stor_device->port_number; + + ret = vmbus_sendpacket(device->channel, vstor_packet, + sizeof(struct vstor_packet), + (unsigned long)request, + VM_PKT_DATA_INBAND, + VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + + if (ret != 0) + goto cleanup; + + t = wait_for_completion_timeout(&request->wait_event, 5*HZ); + if (t == 0) { + ret = -ETIMEDOUT; + goto cleanup; + } + + if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || + vstor_packet->status != 0) + goto cleanup; + + stor_device->path_id = vstor_packet->storage_channel_properties.path_id; + stor_device->target_id + = vstor_packet->storage_channel_properties.target_id; + + memset(vstor_packet, 0, sizeof(struct vstor_packet)); + vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION; + vstor_packet->flags = REQUEST_COMPLETION_FLAG; + + ret = vmbus_sendpacket(device->channel, vstor_packet, + sizeof(struct vstor_packet), + (unsigned long)request, + VM_PKT_DATA_INBAND, + VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + + if (ret != 0) + goto cleanup; + + t = wait_for_completion_timeout(&request->wait_event, 5*HZ); + if (t == 0) { + ret = -ETIMEDOUT; + goto cleanup; + } + + if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || + vstor_packet->status != 0) + goto cleanup; + + +cleanup: + return ret; +} + + +static void storvsc_command_completion(struct storvsc_cmd_request *cmd_request) +{ + struct scsi_cmnd *scmnd = cmd_request->cmd; + struct hv_host_device *host_dev = shost_priv(scmnd->device->host); + void (*scsi_done_fn)(struct scsi_cmnd *); + struct scsi_sense_hdr sense_hdr; + struct vmscsi_request *vm_srb; + struct storvsc_scan_work *wrk; + struct stor_mem_pools *memp = scmnd->device->hostdata; + + vm_srb = &cmd_request->vstor_packet.vm_srb; + if (cmd_request->bounce_sgl_count) { + if (vm_srb->data_in == READ_TYPE) + copy_from_bounce_buffer(scsi_sglist(scmnd), + cmd_request->bounce_sgl, + scsi_sg_count(scmnd), + cmd_request->bounce_sgl_count); + destroy_bounce_buffer(cmd_request->bounce_sgl, + cmd_request->bounce_sgl_count); + } + + /* + * If there is an error; offline the device since all + * error recovery strategies would have already been + * deployed on the host side. + */ + if (vm_srb->srb_status == SRB_STATUS_ERROR) + scmnd->result = DID_TARGET_FAILURE << 16; + else + scmnd->result = vm_srb->scsi_status; + + /* + * If the LUN is invalid; remove the device. + */ + if (vm_srb->srb_status == SRB_STATUS_INVALID_LUN) { + struct storvsc_device *stor_dev; + struct hv_device *dev = host_dev->dev; + struct Scsi_Host *host; + + stor_dev = get_in_stor_device(dev); + host = stor_dev->host; + + wrk = kmalloc(sizeof(struct storvsc_scan_work), + GFP_ATOMIC); + if (!wrk) { + scmnd->result = DID_TARGET_FAILURE << 16; + } else { + wrk->host = host; + wrk->lun = vm_srb->lun; + INIT_WORK(&wrk->work, storvsc_remove_lun); + schedule_work(&wrk->work); + } + } + + if (scmnd->result) { + if (scsi_normalize_sense(scmnd->sense_buffer, + SCSI_SENSE_BUFFERSIZE, &sense_hdr)) + scsi_print_sense_hdr("storvsc", &sense_hdr); + } + + scsi_set_resid(scmnd, + cmd_request->data_buffer.len - + vm_srb->data_transfer_length); + + scsi_done_fn = scmnd->scsi_done; + + scmnd->host_scribble = NULL; + scmnd->scsi_done = NULL; + + scsi_done_fn(scmnd); + + mempool_free(cmd_request, memp->request_mempool); +} + +static void storvsc_on_io_completion(struct hv_device *device, + struct vstor_packet *vstor_packet, + struct storvsc_cmd_request *request) +{ + struct storvsc_device *stor_device; + struct vstor_packet *stor_pkt; + + stor_device = hv_get_drvdata(device); + stor_pkt = &request->vstor_packet; + + /* + * The current SCSI handling on the host side does + * not correctly handle: + * INQUIRY command with page code parameter set to 0x80 + * MODE_SENSE command with cmd[2] == 0x1c + * + * Setup srb and scsi status so this won't be fatal. + * We do this so we can distinguish truly fatal failues + * (srb status == 0x4) and off-line the device in that case. + */ + + if ((stor_pkt->vm_srb.cdb[0] == INQUIRY) || + (stor_pkt->vm_srb.cdb[0] == MODE_SENSE)) { + vstor_packet->vm_srb.scsi_status = 0; + vstor_packet->vm_srb.srb_status = SRB_STATUS_SUCCESS; + } + + + /* Copy over the status...etc */ + stor_pkt->vm_srb.scsi_status = vstor_packet->vm_srb.scsi_status; + stor_pkt->vm_srb.srb_status = vstor_packet->vm_srb.srb_status; + stor_pkt->vm_srb.sense_info_length = + vstor_packet->vm_srb.sense_info_length; + + if (vstor_packet->vm_srb.scsi_status != 0 || + vstor_packet->vm_srb.srb_status != SRB_STATUS_SUCCESS){ + dev_warn(&device->device, + "cmd 0x%x scsi status 0x%x srb status 0x%x\n", + stor_pkt->vm_srb.cdb[0], + vstor_packet->vm_srb.scsi_status, + vstor_packet->vm_srb.srb_status); + } + + if ((vstor_packet->vm_srb.scsi_status & 0xFF) == 0x02) { + /* CHECK_CONDITION */ + if (vstor_packet->vm_srb.srb_status & + SRB_STATUS_AUTOSENSE_VALID) { + /* autosense data available */ + dev_warn(&device->device, + "stor pkt %p autosense data valid - len %d\n", + request, + vstor_packet->vm_srb.sense_info_length); + + memcpy(request->sense_buffer, + vstor_packet->vm_srb.sense_data, + vstor_packet->vm_srb.sense_info_length); + + } + } + + stor_pkt->vm_srb.data_transfer_length = + vstor_packet->vm_srb.data_transfer_length; + + storvsc_command_completion(request); + + if (atomic_dec_and_test(&stor_device->num_outstanding_req) && + stor_device->drain_notify) + wake_up(&stor_device->waiting_to_drain); + + +} + +static void storvsc_on_receive(struct hv_device *device, + struct vstor_packet *vstor_packet, + struct storvsc_cmd_request *request) +{ + struct storvsc_scan_work *work; + struct storvsc_device *stor_device; + + switch (vstor_packet->operation) { + case VSTOR_OPERATION_COMPLETE_IO: + storvsc_on_io_completion(device, vstor_packet, request); + break; + + case VSTOR_OPERATION_REMOVE_DEVICE: + case VSTOR_OPERATION_ENUMERATE_BUS: + stor_device = get_in_stor_device(device); + work = kmalloc(sizeof(struct storvsc_scan_work), GFP_ATOMIC); + if (!work) + return; + + INIT_WORK(&work->work, storvsc_bus_scan); + work->host = stor_device->host; + schedule_work(&work->work); + break; + + default: + break; + } +} + +static void storvsc_on_channel_callback(void *context) +{ + struct hv_device *device = (struct hv_device *)context; + struct storvsc_device *stor_device; + u32 bytes_recvd; + u64 request_id; + unsigned char packet[ALIGN(sizeof(struct vstor_packet), 8)]; + struct storvsc_cmd_request *request; + int ret; + + + stor_device = get_in_stor_device(device); + if (!stor_device) + return; + + do { + ret = vmbus_recvpacket(device->channel, packet, + ALIGN(sizeof(struct vstor_packet), 8), + &bytes_recvd, &request_id); + if (ret == 0 && bytes_recvd > 0) { + + request = (struct storvsc_cmd_request *) + (unsigned long)request_id; + + if ((request == &stor_device->init_request) || + (request == &stor_device->reset_request)) { + + memcpy(&request->vstor_packet, packet, + sizeof(struct vstor_packet)); + complete(&request->wait_event); + } else { + storvsc_on_receive(device, + (struct vstor_packet *)packet, + request); + } + } else { + break; + } + } while (1); + + return; +} + +static int storvsc_connect_to_vsp(struct hv_device *device, u32 ring_size) +{ + struct vmstorage_channel_properties props; + int ret; + + memset(&props, 0, sizeof(struct vmstorage_channel_properties)); + + ret = vmbus_open(device->channel, + ring_size, + ring_size, + (void *)&props, + sizeof(struct vmstorage_channel_properties), + storvsc_on_channel_callback, device); + + if (ret != 0) + return ret; + + ret = storvsc_channel_init(device); + + return ret; +} + +static int storvsc_dev_remove(struct hv_device *device) +{ + struct storvsc_device *stor_device; + unsigned long flags; + + stor_device = hv_get_drvdata(device); + + spin_lock_irqsave(&device->channel->inbound_lock, flags); + stor_device->destroy = true; + spin_unlock_irqrestore(&device->channel->inbound_lock, flags); + + /* + * At this point, all outbound traffic should be disable. We + * only allow inbound traffic (responses) to proceed so that + * outstanding requests can be completed. + */ + + storvsc_wait_to_drain(stor_device); + + /* + * Since we have already drained, we don't need to busy wait + * as was done in final_release_stor_device() + * Note that we cannot set the ext pointer to NULL until + * we have drained - to drain the outgoing packets, we need to + * allow incoming packets. + */ + spin_lock_irqsave(&device->channel->inbound_lock, flags); + hv_set_drvdata(device, NULL); + spin_unlock_irqrestore(&device->channel->inbound_lock, flags); + + /* Close the channel */ + vmbus_close(device->channel); + + kfree(stor_device); + return 0; +} + +static int storvsc_do_io(struct hv_device *device, + struct storvsc_cmd_request *request) +{ + struct storvsc_device *stor_device; + struct vstor_packet *vstor_packet; + int ret = 0; + + vstor_packet = &request->vstor_packet; + stor_device = get_out_stor_device(device); + + if (!stor_device) + return -ENODEV; + + + request->device = device; + + + vstor_packet->flags |= REQUEST_COMPLETION_FLAG; + + vstor_packet->vm_srb.length = sizeof(struct vmscsi_request); + + + vstor_packet->vm_srb.sense_info_length = STORVSC_SENSE_BUFFER_SIZE; + + + vstor_packet->vm_srb.data_transfer_length = + request->data_buffer.len; + + vstor_packet->operation = VSTOR_OPERATION_EXECUTE_SRB; + + if (request->data_buffer.len) { + ret = vmbus_sendpacket_multipagebuffer(device->channel, + &request->data_buffer, + vstor_packet, + sizeof(struct vstor_packet), + (unsigned long)request); + } else { + ret = vmbus_sendpacket(device->channel, vstor_packet, + sizeof(struct vstor_packet), + (unsigned long)request, + VM_PKT_DATA_INBAND, + VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + } + + if (ret != 0) + return ret; + + atomic_inc(&stor_device->num_outstanding_req); + + return ret; +} + +static int storvsc_device_alloc(struct scsi_device *sdevice) +{ + struct stor_mem_pools *memp; + int number = STORVSC_MIN_BUF_NR; + + memp = kzalloc(sizeof(struct stor_mem_pools), GFP_KERNEL); + if (!memp) + return -ENOMEM; + + memp->request_pool = + kmem_cache_create(dev_name(&sdevice->sdev_dev), + sizeof(struct storvsc_cmd_request), 0, + SLAB_HWCACHE_ALIGN, NULL); + + if (!memp->request_pool) + goto err0; + + memp->request_mempool = mempool_create(number, mempool_alloc_slab, + mempool_free_slab, + memp->request_pool); + + if (!memp->request_mempool) + goto err1; + + sdevice->hostdata = memp; + + return 0; + +err1: + kmem_cache_destroy(memp->request_pool); + +err0: + kfree(memp); + return -ENOMEM; +} + +static void storvsc_device_destroy(struct scsi_device *sdevice) +{ + struct stor_mem_pools *memp = sdevice->hostdata; + + mempool_destroy(memp->request_mempool); + kmem_cache_destroy(memp->request_pool); + kfree(memp); + sdevice->hostdata = NULL; +} + +static int storvsc_device_configure(struct scsi_device *sdevice) +{ + scsi_adjust_queue_depth(sdevice, MSG_SIMPLE_TAG, + STORVSC_MAX_IO_REQUESTS); + + blk_queue_max_segment_size(sdevice->request_queue, PAGE_SIZE); + + blk_queue_bounce_limit(sdevice->request_queue, BLK_BOUNCE_ANY); + + return 0; +} + +static int storvsc_get_chs(struct scsi_device *sdev, struct block_device * bdev, + sector_t capacity, int *info) +{ + sector_t nsect = capacity; + sector_t cylinders = nsect; + int heads, sectors_pt; + + /* + * We are making up these values; let us keep it simple. + */ + heads = 0xff; + sectors_pt = 0x3f; /* Sectors per track */ + sector_div(cylinders, heads * sectors_pt); + if ((sector_t)(cylinders + 1) * heads * sectors_pt < nsect) + cylinders = 0xffff; + + info[0] = heads; + info[1] = sectors_pt; + info[2] = (int)cylinders; + + return 0; +} + +static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) +{ + struct hv_host_device *host_dev = shost_priv(scmnd->device->host); + struct hv_device *device = host_dev->dev; + + struct storvsc_device *stor_device; + struct storvsc_cmd_request *request; + struct vstor_packet *vstor_packet; + int ret, t; + + + stor_device = get_out_stor_device(device); + if (!stor_device) + return FAILED; + + request = &stor_device->reset_request; + vstor_packet = &request->vstor_packet; + + init_completion(&request->wait_event); + + vstor_packet->operation = VSTOR_OPERATION_RESET_BUS; + vstor_packet->flags = REQUEST_COMPLETION_FLAG; + vstor_packet->vm_srb.path_id = stor_device->path_id; + + ret = vmbus_sendpacket(device->channel, vstor_packet, + sizeof(struct vstor_packet), + (unsigned long)&stor_device->reset_request, + VM_PKT_DATA_INBAND, + VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); + if (ret != 0) + return FAILED; + + t = wait_for_completion_timeout(&request->wait_event, 5*HZ); + if (t == 0) + return TIMEOUT_ERROR; + + + /* + * At this point, all outstanding requests in the adapter + * should have been flushed out and return to us + */ + + return SUCCESS; +} + +static bool storvsc_scsi_cmd_ok(struct scsi_cmnd *scmnd) +{ + bool allowed = true; + u8 scsi_op = scmnd->cmnd[0]; + + switch (scsi_op) { + /* + * smartd sends this command and the host does not handle + * this. So, don't send it. + */ + case SET_WINDOW: + scmnd->result = ILLEGAL_REQUEST << 16; + allowed = false; + break; + default: + break; + } + return allowed; +} + +static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) +{ + int ret; + struct hv_host_device *host_dev = shost_priv(host); + struct hv_device *dev = host_dev->dev; + struct storvsc_cmd_request *cmd_request; + unsigned int request_size = 0; + int i; + struct scatterlist *sgl; + unsigned int sg_count = 0; + struct vmscsi_request *vm_srb; + struct stor_mem_pools *memp = scmnd->device->hostdata; + + if (!storvsc_scsi_cmd_ok(scmnd)) { + scmnd->scsi_done(scmnd); + return 0; + } + + request_size = sizeof(struct storvsc_cmd_request); + + cmd_request = mempool_alloc(memp->request_mempool, + GFP_ATOMIC); + + /* + * We might be invoked in an interrupt context; hence + * mempool_alloc() can fail. + */ + if (!cmd_request) + return SCSI_MLQUEUE_DEVICE_BUSY; + + memset(cmd_request, 0, sizeof(struct storvsc_cmd_request)); + + /* Setup the cmd request */ + cmd_request->cmd = scmnd; + + scmnd->host_scribble = (unsigned char *)cmd_request; + + vm_srb = &cmd_request->vstor_packet.vm_srb; + + + /* Build the SRB */ + switch (scmnd->sc_data_direction) { + case DMA_TO_DEVICE: + vm_srb->data_in = WRITE_TYPE; + break; + case DMA_FROM_DEVICE: + vm_srb->data_in = READ_TYPE; + break; + default: + vm_srb->data_in = UNKNOWN_TYPE; + break; + } + + + vm_srb->port_number = host_dev->port; + vm_srb->path_id = scmnd->device->channel; + vm_srb->target_id = scmnd->device->id; + vm_srb->lun = scmnd->device->lun; + + vm_srb->cdb_length = scmnd->cmd_len; + + memcpy(vm_srb->cdb, scmnd->cmnd, vm_srb->cdb_length); + + cmd_request->sense_buffer = scmnd->sense_buffer; + + + cmd_request->data_buffer.len = scsi_bufflen(scmnd); + if (scsi_sg_count(scmnd)) { + sgl = (struct scatterlist *)scsi_sglist(scmnd); + sg_count = scsi_sg_count(scmnd); + + /* check if we need to bounce the sgl */ + if (do_bounce_buffer(sgl, scsi_sg_count(scmnd)) != -1) { + cmd_request->bounce_sgl = + create_bounce_buffer(sgl, scsi_sg_count(scmnd), + scsi_bufflen(scmnd), + vm_srb->data_in); + if (!cmd_request->bounce_sgl) { + ret = SCSI_MLQUEUE_HOST_BUSY; + goto queue_error; + } + + cmd_request->bounce_sgl_count = + ALIGN(scsi_bufflen(scmnd), PAGE_SIZE) >> + PAGE_SHIFT; + + if (vm_srb->data_in == WRITE_TYPE) + copy_to_bounce_buffer(sgl, + cmd_request->bounce_sgl, + scsi_sg_count(scmnd)); + + sgl = cmd_request->bounce_sgl; + sg_count = cmd_request->bounce_sgl_count; + } + + cmd_request->data_buffer.offset = sgl[0].offset; + + for (i = 0; i < sg_count; i++) + cmd_request->data_buffer.pfn_array[i] = + page_to_pfn(sg_page((&sgl[i]))); + + } else if (scsi_sglist(scmnd)) { + cmd_request->data_buffer.offset = + virt_to_phys(scsi_sglist(scmnd)) & (PAGE_SIZE-1); + cmd_request->data_buffer.pfn_array[0] = + virt_to_phys(scsi_sglist(scmnd)) >> PAGE_SHIFT; + } + + /* Invokes the vsc to start an IO */ + ret = storvsc_do_io(dev, cmd_request); + + if (ret == -EAGAIN) { + /* no more space */ + + if (cmd_request->bounce_sgl_count) { + destroy_bounce_buffer(cmd_request->bounce_sgl, + cmd_request->bounce_sgl_count); + + ret = SCSI_MLQUEUE_DEVICE_BUSY; + goto queue_error; + } + } + + return 0; + +queue_error: + mempool_free(cmd_request, memp->request_mempool); + scmnd->host_scribble = NULL; + return ret; +} + +static struct scsi_host_template scsi_driver = { + .module = THIS_MODULE, + .name = "storvsc_host_t", + .bios_param = storvsc_get_chs, + .queuecommand = storvsc_queuecommand, + .eh_host_reset_handler = storvsc_host_reset_handler, + .slave_alloc = storvsc_device_alloc, + .slave_destroy = storvsc_device_destroy, + .slave_configure = storvsc_device_configure, + .cmd_per_lun = 1, + /* 64 max_queue * 1 target */ + .can_queue = STORVSC_MAX_IO_REQUESTS*STORVSC_MAX_TARGETS, + .this_id = -1, + /* no use setting to 0 since ll_blk_rw reset it to 1 */ + /* currently 32 */ + .sg_tablesize = MAX_MULTIPAGE_BUFFER_COUNT, + .use_clustering = DISABLE_CLUSTERING, + /* Make sure we dont get a sg segment crosses a page boundary */ + .dma_boundary = PAGE_SIZE-1, +}; + +enum { + SCSI_GUID, + IDE_GUID, +}; + +static const struct hv_vmbus_device_id id_table[] = { + /* SCSI guid */ + { VMBUS_DEVICE(0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, + 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f) + .driver_data = SCSI_GUID }, + /* IDE guid */ + { VMBUS_DEVICE(0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, + 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5) + .driver_data = IDE_GUID }, + { }, +}; + +MODULE_DEVICE_TABLE(vmbus, id_table); + +static int storvsc_probe(struct hv_device *device, + const struct hv_vmbus_device_id *dev_id) +{ + int ret; + struct Scsi_Host *host; + struct hv_host_device *host_dev; + bool dev_is_ide = ((dev_id->driver_data == IDE_GUID) ? true : false); + int target = 0; + struct storvsc_device *stor_device; + + host = scsi_host_alloc(&scsi_driver, + sizeof(struct hv_host_device)); + if (!host) + return -ENOMEM; + + host_dev = shost_priv(host); + memset(host_dev, 0, sizeof(struct hv_host_device)); + + host_dev->port = host->host_no; + host_dev->dev = device; + + + stor_device = kzalloc(sizeof(struct storvsc_device), GFP_KERNEL); + if (!stor_device) { + ret = -ENOMEM; + goto err_out0; + } + + stor_device->destroy = false; + init_waitqueue_head(&stor_device->waiting_to_drain); + stor_device->device = device; + stor_device->host = host; + hv_set_drvdata(device, stor_device); + + stor_device->port_number = host->host_no; + ret = storvsc_connect_to_vsp(device, storvsc_ringbuffer_size); + if (ret) + goto err_out1; + + host_dev->path = stor_device->path_id; + host_dev->target = stor_device->target_id; + + /* max # of devices per target */ + host->max_lun = STORVSC_MAX_LUNS_PER_TARGET; + /* max # of targets per channel */ + host->max_id = STORVSC_MAX_TARGETS; + /* max # of channels */ + host->max_channel = STORVSC_MAX_CHANNELS - 1; + /* max cmd length */ + host->max_cmd_len = STORVSC_MAX_CMD_LEN; + + /* Register the HBA and start the scsi bus scan */ + ret = scsi_add_host(host, &device->device); + if (ret != 0) + goto err_out2; + + if (!dev_is_ide) { + scsi_scan_host(host); + } else { + target = (device->dev_instance.b[5] << 8 | + device->dev_instance.b[4]); + ret = scsi_add_device(host, 0, target, 0); + if (ret) { + scsi_remove_host(host); + goto err_out2; + } + } + return 0; + +err_out2: + /* + * Once we have connected with the host, we would need to + * to invoke storvsc_dev_remove() to rollback this state and + * this call also frees up the stor_device; hence the jump around + * err_out1 label. + */ + storvsc_dev_remove(device); + goto err_out0; + +err_out1: + kfree(stor_device); + +err_out0: + scsi_host_put(host); + return ret; +} + +static int storvsc_remove(struct hv_device *dev) +{ + struct storvsc_device *stor_device = hv_get_drvdata(dev); + struct Scsi_Host *host = stor_device->host; + + scsi_remove_host(host); + storvsc_dev_remove(dev); + scsi_host_put(host); + + return 0; +} + +static struct hv_driver storvsc_drv = { + .name = KBUILD_MODNAME, + .id_table = id_table, + .probe = storvsc_probe, + .remove = storvsc_remove, +}; + +static int __init storvsc_drv_init(void) +{ + u32 max_outstanding_req_per_channel; + + /* + * Divide the ring buffer data size (which is 1 page less + * than the ring buffer size since that page is reserved for + * the ring buffer indices) by the max request size (which is + * vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64) + */ + max_outstanding_req_per_channel = + ((storvsc_ringbuffer_size - PAGE_SIZE) / + ALIGN(MAX_MULTIPAGE_BUFFER_PACKET + + sizeof(struct vstor_packet) + sizeof(u64), + sizeof(u64))); + + if (max_outstanding_req_per_channel < + STORVSC_MAX_IO_REQUESTS) + return -EINVAL; + + return vmbus_driver_register(&storvsc_drv); +} + +static void __exit storvsc_drv_exit(void) +{ + vmbus_driver_unregister(&storvsc_drv); +} + +MODULE_LICENSE("GPL"); +MODULE_VERSION(HV_DRV_VERSION); +MODULE_DESCRIPTION("Microsoft Hyper-V virtual storage driver"); +module_init(storvsc_drv_init); +module_exit(storvsc_drv_exit); |