From: Chad Dupuis Date: Wed, 22 Aug 2012 18:21:00 +0000 (-0400) Subject: [SCSI] qla2xxx: Use bitmap to store loop_id's for fcports. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5f16b331d83757ad5154af07b449c722fef45d5e;p=linux-beck.git [SCSI] qla2xxx: Use bitmap to store loop_id's for fcports. Store used fcport loop_id's in a bitmap so that as opposed to looping through all fcports to find the next free loop_id, new loop_id lookup can be just be done via bitops. [jejb: plus fix for incorrect LOOPID_MAP_SIZE from Andrew Vasquez] Signed-off-by: Giridhar Malavali Signed-off-by: Andrew Vasquez Signed-off-by: Chad Dupuis Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c index d651179899fa..0c4fd2cebc17 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.c +++ b/drivers/scsi/qla2xxx/qla_dbg.c @@ -11,7 +11,7 @@ * ---------------------------------------------------------------------- * | Level | Last Value Used | Holes | * ---------------------------------------------------------------------- - * | Module Init and Probe | 0x0122 | 0x4b,0xba,0xfa | + * | Module Init and Probe | 0x0123 | 0x4b,0xba,0xfa | * | Mailbox commands | 0x1140 | 0x111a-0x111b | * | | | 0x112c-0x112e | * | | | 0x113a | diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 39007f53aec0..28c0b3575616 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -129,6 +129,7 @@ #define MAX_FIBRE_DEVICES_2400 2048 #define MAX_FIBRE_DEVICES_LOOP 128 #define MAX_FIBRE_DEVICES_MAX MAX_FIBRE_DEVICES_2400 +#define LOOPID_MAP_SIZE (ha->max_fibre_devices) #define MAX_FIBRE_LUNS 0xFFFF #define MAX_HOST_COUNT 16 @@ -2918,6 +2919,7 @@ struct qla_hw_data { void *md_dump; uint32_t md_dump_size; + void *loop_id_map; struct qlt_hw_data tgt; }; diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index a44653b42161..290052352619 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -3285,7 +3285,7 @@ qla2x00_find_all_fabric_devs(scsi_qla_host_t *vha, */ if ((fcport->flags & FCF_FABRIC_DEVICE) == 0) { fcport->d_id.b24 = new_fcport->d_id.b24; - fcport->loop_id = FC_NO_LOOP_ID; + qla2x00_clear_loop_id(fcport); fcport->flags |= (FCF_FABRIC_DEVICE | FCF_LOGIN_NEEDED); break; @@ -3306,7 +3306,7 @@ qla2x00_find_all_fabric_devs(scsi_qla_host_t *vha, ha->isp_ops->fabric_logout(vha, fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa); - fcport->loop_id = FC_NO_LOOP_ID; + qla2x00_clear_loop_id(fcport); } break; @@ -3352,71 +3352,32 @@ int qla2x00_find_new_loop_id(scsi_qla_host_t *vha, fc_port_t *dev) { int rval; - int found; - fc_port_t *fcport; - uint16_t first_loop_id; struct qla_hw_data *ha = vha->hw; - struct scsi_qla_host *vp; - struct scsi_qla_host *tvp; unsigned long flags = 0; rval = QLA_SUCCESS; - /* Save starting loop ID. */ - first_loop_id = dev->loop_id; - - for (;;) { - /* Skip loop ID if already used by adapter. */ - if (dev->loop_id == vha->loop_id) - dev->loop_id++; - - /* Skip reserved loop IDs. */ - while (qla2x00_is_reserved_id(vha, dev->loop_id)) - dev->loop_id++; - - /* Reset loop ID if passed the end. */ - if (dev->loop_id > ha->max_loop_id) { - /* first loop ID. */ - dev->loop_id = ha->min_external_loopid; - } - - /* Check for loop ID being already in use. */ - found = 0; - fcport = NULL; - - spin_lock_irqsave(&ha->vport_slock, flags); - list_for_each_entry_safe(vp, tvp, &ha->vp_list, list) { - list_for_each_entry(fcport, &vp->vp_fcports, list) { - if (fcport->loop_id == dev->loop_id && - fcport != dev) { - /* ID possibly in use */ - found++; - break; - } - } - if (found) - break; - } - spin_unlock_irqrestore(&ha->vport_slock, flags); + spin_lock_irqsave(&ha->vport_slock, flags); - /* If not in use then it is free to use. */ - if (!found) { - ql_dbg(ql_dbg_disc, dev->vha, 0x2086, - "Assigning new loopid=%x, portid=%x.\n", - dev->loop_id, dev->d_id.b24); - break; - } + dev->loop_id = find_first_zero_bit(ha->loop_id_map, + LOOPID_MAP_SIZE); + if (dev->loop_id >= LOOPID_MAP_SIZE || + qla2x00_is_reserved_id(vha, dev->loop_id)) { + dev->loop_id = FC_NO_LOOP_ID; + rval = QLA_FUNCTION_FAILED; + } else + set_bit(dev->loop_id, ha->loop_id_map); - /* ID in use. Try next value. */ - dev->loop_id++; + spin_unlock_irqrestore(&ha->vport_slock, flags); - /* If wrap around. No free ID to use. */ - if (dev->loop_id == first_loop_id) { - dev->loop_id = FC_NO_LOOP_ID; - rval = QLA_FUNCTION_FAILED; - break; - } - } + if (rval == QLA_SUCCESS) + ql_dbg(ql_dbg_disc, dev->vha, 0x2086, + "Assigning new loopid=%x, portid=%x.\n", + dev->loop_id, dev->d_id.b24); + else + ql_log(ql_log_warn, dev->vha, 0x2087, + "No loop_id's available, portid=%x.\n", + dev->d_id.b24); return (rval); } @@ -3616,7 +3577,7 @@ qla2x00_fabric_login(scsi_qla_host_t *vha, fc_port_t *fcport, ha->isp_ops->fabric_logout(vha, fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa); - fcport->loop_id = FC_NO_LOOP_ID; + qla2x00_clear_loop_id(fcport); fcport->login_retry = 0; rval = 3; diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h index 6e457643c639..c12add261712 100644 --- a/drivers/scsi/qla2xxx/qla_inline.h +++ b/drivers/scsi/qla2xxx/qla_inline.h @@ -57,6 +57,20 @@ host_to_fcp_swap(uint8_t *fcp, uint32_t bsize) return fcp; } +static inline void +qla2x00_set_reserved_loop_ids(struct qla_hw_data *ha) +{ + int i; + + if (IS_FWI2_CAPABLE(ha)) + return; + + for (i = 0; i < SNS_FIRST_LOOP_ID; i++) + set_bit(i, ha->loop_id_map); + set_bit(MANAGEMENT_SERVER, ha->loop_id_map); + set_bit(BROADCAST, ha->loop_id_map); +} + static inline int qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id) { @@ -68,6 +82,18 @@ qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id) loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST); } +static inline void +qla2x00_clear_loop_id(fc_port_t *fcport) { + struct qla_hw_data *ha = fcport->vha->hw; + + if (fcport->loop_id == FC_NO_LOOP_ID || + qla2x00_is_reserved_id(fcport->vha, fcport->loop_id)) + return; + + clear_bit(fcport->loop_id, ha->loop_id_map); + fcport->loop_id = FC_NO_LOOP_ID; +} + static inline void qla2x00_clean_dsd_pool(struct qla_hw_data *ha, srb_t *sp) { diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index caa4ce417681..5f990291c259 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -2872,6 +2872,7 @@ void qla2x00_free_fcports(struct scsi_qla_host *vha) list_for_each_entry_safe(fcport, tfcport, &vha->vp_fcports, list) { list_del(&fcport->list); + qla2x00_clear_loop_id(fcport); kfree(fcport); fcport = NULL; } @@ -3169,6 +3170,18 @@ qla2x00_mem_alloc(struct qla_hw_data *ha, uint16_t req_len, uint16_t rsp_len, } INIT_LIST_HEAD(&ha->vp_list); + + /* Allocate memory for our loop_id bitmap */ + ha->loop_id_map = kzalloc(BITS_TO_LONGS(LOOPID_MAP_SIZE) * sizeof(long), + GFP_KERNEL); + if (!ha->loop_id_map) + goto fail_async_pd; + else { + qla2x00_set_reserved_loop_ids(ha); + ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0123, + "loop_id_map=%p. \n", ha->loop_id_map); + } + return 1; fail_async_pd: @@ -3352,6 +3365,7 @@ qla2x00_mem_free(struct qla_hw_data *ha) kfree(ha->nvram); kfree(ha->npiv_info); kfree(ha->swl); + kfree(ha->loop_id_map); ha->srb_mempool = NULL; ha->ctx_mempool = NULL; @@ -3687,7 +3701,7 @@ void qla2x00_relogin(struct scsi_qla_host *vha) } if (fcport->login_retry == 0 && status != QLA_SUCCESS) - fcport->loop_id = FC_NO_LOOP_ID; + qla2x00_clear_loop_id(fcport); } if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags)) break;