diff options
author | Krishna Gudipati <kgudipat@brocade.com> | 2012-09-21 17:26:41 -0700 |
---|---|---|
committer | James Bottomley <JBottomley@Parallels.com> | 2012-10-07 11:21:29 +0100 |
commit | 7ace27ae28a5fa67fa3d25f31d1111991c81e015 (patch) | |
tree | 841612f109ef2b32d15613aa8093d683a6261356 | |
parent | 6894f013a71b1bcd09f46b8071f0c6b55fc58139 (diff) | |
download | linux-7ace27ae28a5fa67fa3d25f31d1111991c81e015.tar.bz2 |
[SCSI] bfa: Add support for IO throttling at port level
Add capability to limit the number of exchanges on a port to
avoid queue-full conditions from the target side.
Signed-off-by: Sudarsana Reddy Kalluru <skalluru@brocade.com>
Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
-rw-r--r-- | drivers/scsi/bfa/bfa_core.c | 9 | ||||
-rw-r--r-- | drivers/scsi/bfa/bfa_defs_svc.h | 13 | ||||
-rw-r--r-- | drivers/scsi/bfa/bfa_fcpim.c | 105 | ||||
-rw-r--r-- | drivers/scsi/bfa/bfa_fcpim.h | 9 | ||||
-rw-r--r-- | drivers/scsi/bfa/bfa_fcs_rport.c | 6 | ||||
-rw-r--r-- | drivers/scsi/bfa/bfa_ioc.h | 3 | ||||
-rw-r--r-- | drivers/scsi/bfa/bfad_bsg.c | 36 | ||||
-rw-r--r-- | drivers/scsi/bfa/bfad_bsg.h | 9 |
8 files changed, 182 insertions, 8 deletions
diff --git a/drivers/scsi/bfa/bfa_core.c b/drivers/scsi/bfa/bfa_core.c index 837879de72c3..eb296286c37e 100644 --- a/drivers/scsi/bfa/bfa_core.c +++ b/drivers/scsi/bfa/bfa_core.c @@ -983,7 +983,8 @@ bfa_iocfc_send_cfg(void *bfa_arg) cfg_info->single_msix_vec = 1; cfg_info->endian_sig = BFI_IOC_ENDIAN_SIG; cfg_info->num_cqs = cfg->fwcfg.num_cqs; - cfg_info->num_ioim_reqs = cpu_to_be16(cfg->fwcfg.num_ioim_reqs); + cfg_info->num_ioim_reqs = cpu_to_be16(bfa_fcpim_get_throttle_cfg(bfa, + cfg->fwcfg.num_ioim_reqs)); cfg_info->num_fwtio_reqs = cpu_to_be16(cfg->fwcfg.num_fwtio_reqs); bfa_dma_be_addr_set(cfg_info->cfgrsp_addr, iocfc->cfgrsp_dma.pa); @@ -1245,10 +1246,14 @@ bfa_iocfc_qreg(struct bfa_s *bfa, struct bfi_iocfc_qreg_s *qreg) static void bfa_iocfc_res_recfg(struct bfa_s *bfa, struct bfa_iocfc_fwcfg_s *fwcfg) { + struct bfa_iocfc_s *iocfc = &bfa->iocfc; + struct bfi_iocfc_cfg_s *cfg_info = iocfc->cfginfo; + bfa_fcxp_res_recfg(bfa, fwcfg->num_fcxp_reqs); bfa_uf_res_recfg(bfa, fwcfg->num_uf_bufs); bfa_rport_res_recfg(bfa, fwcfg->num_rports); - bfa_fcp_res_recfg(bfa, fwcfg->num_ioim_reqs); + bfa_fcp_res_recfg(bfa, cpu_to_be16(cfg_info->num_ioim_reqs), + fwcfg->num_ioim_reqs); bfa_tskim_res_recfg(bfa, fwcfg->num_tskim_reqs); } diff --git a/drivers/scsi/bfa/bfa_defs_svc.h b/drivers/scsi/bfa/bfa_defs_svc.h index 18e4f6ba70d2..0e37e233ebc5 100644 --- a/drivers/scsi/bfa/bfa_defs_svc.h +++ b/drivers/scsi/bfa/bfa_defs_svc.h @@ -875,6 +875,19 @@ struct bfa_lunmask_cfg_s { struct bfa_lun_mask_s lun_list[MAX_LUN_MASK_CFG]; }; +struct bfa_throttle_cfg_s { + u16 is_valid; + u16 value; + u32 rsvd; +}; + +struct bfa_defs_fcpim_throttle_s { + u16 max_value; + u16 cur_value; + u16 cfg_value; + u16 rsvd; +}; + /* * Physical port configuration */ diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c index 4118d84be6eb..27b560962357 100644 --- a/drivers/scsi/bfa/bfa_fcpim.c +++ b/drivers/scsi/bfa/bfa_fcpim.c @@ -3703,6 +3703,7 @@ bfa_fcp_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg, struct bfa_mem_dma_s *seg_ptr; u16 idx, nsegs, num_io_req; + fcp->max_ioim_reqs = cfg->fwcfg.num_ioim_reqs; fcp->num_ioim_reqs = cfg->fwcfg.num_ioim_reqs; fcp->num_fwtio_reqs = cfg->fwcfg.num_fwtio_reqs; fcp->num_itns = cfg->fwcfg.num_rports; @@ -3725,6 +3726,7 @@ bfa_fcp_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg, bfa_iocfc_set_snsbase(bfa, idx, fcp->snsbase[idx].pa); } + fcp->throttle_update_required = 1; bfa_fcpim_attach(fcp, bfad, cfg, pcidev); bfa_iotag_attach(fcp); @@ -3763,23 +3765,33 @@ bfa_fcp_iocdisable(struct bfa_s *bfa) { struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa); - /* Enqueue unused ioim resources to free_q */ - list_splice_tail_init(&fcp->iotag_unused_q, &fcp->iotag_ioim_free_q); - bfa_fcpim_iocdisable(fcp); } void -bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw) +bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw, u16 max_ioim_fw) { struct bfa_fcp_mod_s *mod = BFA_FCP_MOD(bfa); struct list_head *qe; int i; + /* Update io throttle value only once during driver load time */ + if (!mod->throttle_update_required) + return; + for (i = 0; i < (mod->num_ioim_reqs - num_ioim_fw); i++) { bfa_q_deq_tail(&mod->iotag_ioim_free_q, &qe); list_add_tail(qe, &mod->iotag_unused_q); } + + if (mod->num_ioim_reqs != num_ioim_fw) { + bfa_trc(bfa, mod->num_ioim_reqs); + bfa_trc(bfa, num_ioim_fw); + } + + mod->max_ioim_reqs = max_ioim_fw; + mod->num_ioim_reqs = num_ioim_fw; + mod->throttle_update_required = 0; } void @@ -3837,3 +3849,88 @@ bfa_iotag_attach(struct bfa_fcp_mod_s *fcp) bfa_mem_kva_curp(fcp) = (u8 *) iotag; } + + +/** + * To send config req, first try to use throttle value from flash + * If 0, then use driver parameter + * We need to use min(flash_val, drv_val) because + * memory allocation was done based on this cfg'd value + */ +u16 +bfa_fcpim_get_throttle_cfg(struct bfa_s *bfa, u16 drv_cfg_param) +{ + u16 tmp; + struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa); + + /* + * If throttle value from flash is already in effect after driver is + * loaded then until next load, always return current value instead + * of actual flash value + */ + if (!fcp->throttle_update_required) + return (u16)fcp->num_ioim_reqs; + + tmp = bfa_dconf_read_data_valid(bfa) ? bfa_fcpim_read_throttle(bfa) : 0; + if (!tmp || (tmp > drv_cfg_param)) + tmp = drv_cfg_param; + + return tmp; +} + +bfa_status_t +bfa_fcpim_write_throttle(struct bfa_s *bfa, u16 value) +{ + if (!bfa_dconf_get_min_cfg(bfa)) { + BFA_DCONF_MOD(bfa)->dconf->throttle_cfg.value = value; + BFA_DCONF_MOD(bfa)->dconf->throttle_cfg.is_valid = 1; + return BFA_STATUS_OK; + } + + return BFA_STATUS_FAILED; +} + +u16 +bfa_fcpim_read_throttle(struct bfa_s *bfa) +{ + struct bfa_throttle_cfg_s *throttle_cfg = + &(BFA_DCONF_MOD(bfa)->dconf->throttle_cfg); + + return ((!bfa_dconf_get_min_cfg(bfa)) ? + ((throttle_cfg->is_valid == 1) ? (throttle_cfg->value) : 0) : 0); +} + +bfa_status_t +bfa_fcpim_throttle_set(struct bfa_s *bfa, u16 value) +{ + /* in min cfg no commands should run. */ + if ((bfa_dconf_get_min_cfg(bfa) == BFA_TRUE) || + (!bfa_dconf_read_data_valid(bfa))) + return BFA_STATUS_FAILED; + + bfa_fcpim_write_throttle(bfa, value); + + return bfa_dconf_update(bfa); +} + +bfa_status_t +bfa_fcpim_throttle_get(struct bfa_s *bfa, void *buf) +{ + struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa); + struct bfa_defs_fcpim_throttle_s throttle; + + if ((bfa_dconf_get_min_cfg(bfa) == BFA_TRUE) || + (!bfa_dconf_read_data_valid(bfa))) + return BFA_STATUS_FAILED; + + memset(&throttle, 0, sizeof(struct bfa_defs_fcpim_throttle_s)); + + throttle.cur_value = (u16)(fcpim->fcp->num_ioim_reqs); + throttle.cfg_value = bfa_fcpim_read_throttle(bfa); + if (!throttle.cfg_value) + throttle.cfg_value = throttle.cur_value; + throttle.max_value = (u16)(fcpim->fcp->max_ioim_reqs); + memcpy(buf, &throttle, sizeof(struct bfa_defs_fcpim_throttle_s)); + + return BFA_STATUS_OK; +} diff --git a/drivers/scsi/bfa/bfa_fcpim.h b/drivers/scsi/bfa/bfa_fcpim.h index b81d51cfe2bb..e693af6e5930 100644 --- a/drivers/scsi/bfa/bfa_fcpim.h +++ b/drivers/scsi/bfa/bfa_fcpim.h @@ -42,7 +42,7 @@ void bfa_itn_create(struct bfa_s *bfa, struct bfa_rport_s *rport, void (*isr)(struct bfa_s *bfa, struct bfi_msg_s *m)); void bfa_itn_isr(struct bfa_s *bfa, struct bfi_msg_s *m); void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp); -void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw); +void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw, u16 max_ioim_fw); #define BFA_FCP_MOD(_hal) (&(_hal)->modules.fcp_mod) #define BFA_MEM_FCP_KVA(__bfa) (&(BFA_FCP_MOD(__bfa)->kva_seg)) @@ -150,6 +150,7 @@ struct bfa_fcp_mod_s { struct list_head iotag_unused_q; /* unused IO resources*/ struct bfa_iotag_s *iotag_arr; struct bfa_itn_s *itn_arr; + int max_ioim_reqs; int num_ioim_reqs; int num_fwtio_reqs; int num_itns; @@ -157,6 +158,7 @@ struct bfa_fcp_mod_s { struct bfa_fcpim_s fcpim; struct bfa_mem_dma_s dma_seg[BFA_FCP_DMA_SEGS]; struct bfa_mem_kva_s kva_seg; + int throttle_update_required; }; /* @@ -418,5 +420,10 @@ bfa_status_t bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id, bfa_status_t bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id, wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun); bfa_status_t bfa_fcpim_lunmask_clear(struct bfa_s *bfa); +u16 bfa_fcpim_read_throttle(struct bfa_s *bfa); +bfa_status_t bfa_fcpim_write_throttle(struct bfa_s *bfa, u16 value); +bfa_status_t bfa_fcpim_throttle_set(struct bfa_s *bfa, u16 value); +bfa_status_t bfa_fcpim_throttle_get(struct bfa_s *bfa, void *buf); +u16 bfa_fcpim_get_throttle_cfg(struct bfa_s *bfa, u16 drv_cfg_param); #endif /* __BFA_FCPIM_H__ */ diff --git a/drivers/scsi/bfa/bfa_fcs_rport.c b/drivers/scsi/bfa/bfa_fcs_rport.c index e90800d0557a..58ac643ba9f3 100644 --- a/drivers/scsi/bfa/bfa_fcs_rport.c +++ b/drivers/scsi/bfa/bfa_fcs_rport.c @@ -3026,6 +3026,9 @@ bfa_fcs_rport_get_attr(struct bfa_fcs_rport_s *rport, struct bfa_rport_qos_attr_s qos_attr; struct bfa_fcs_lport_s *port = rport->port; bfa_port_speed_t rport_speed = rport->rpf.rpsc_speed; + struct bfa_port_attr_s port_attr; + + bfa_fcport_get_attr(rport->fcs->bfa, &port_attr); memset(rport_attr, 0, sizeof(struct bfa_rport_attr_s)); memset(&qos_attr, 0, sizeof(struct bfa_rport_qos_attr_s)); @@ -3056,7 +3059,8 @@ bfa_fcs_rport_get_attr(struct bfa_fcs_rport_s *rport, rport_speed = bfa_fcport_get_ratelim_speed(rport->fcs->bfa); - if (rport_speed < bfa_fcs_lport_get_rport_max_speed(port)) + if ((bfa_fcs_lport_get_rport_max_speed(port) != + BFA_PORT_SPEED_UNKNOWN) && (rport_speed < port_attr.speed)) rport_attr->trl_enforced = BFA_TRUE; } } diff --git a/drivers/scsi/bfa/bfa_ioc.h b/drivers/scsi/bfa/bfa_ioc.h index f16ebc92d1ef..8e267246c1a5 100644 --- a/drivers/scsi/bfa/bfa_ioc.h +++ b/drivers/scsi/bfa/bfa_ioc.h @@ -716,6 +716,7 @@ struct bfa_dconf_hdr_s { struct bfa_dconf_s { struct bfa_dconf_hdr_s hdr; struct bfa_lunmask_cfg_s lun_mask; + struct bfa_throttle_cfg_s throttle_cfg; }; #pragma pack() @@ -738,6 +739,8 @@ struct bfa_dconf_mod_s { #define bfa_dconf_read_data_valid(__bfa) \ (BFA_DCONF_MOD(__bfa)->read_data_valid) #define BFA_DCONF_UPDATE_TOV 5000 /* memtest timeout in msec */ +#define bfa_dconf_get_min_cfg(__bfa) \ + (BFA_DCONF_MOD(__bfa)->min_cfg) void bfa_dconf_modinit(struct bfa_s *bfa); void bfa_dconf_modexit(struct bfa_s *bfa); diff --git a/drivers/scsi/bfa/bfad_bsg.c b/drivers/scsi/bfa/bfad_bsg.c index 90c40e4e2d4b..6e1478ae6251 100644 --- a/drivers/scsi/bfa/bfad_bsg.c +++ b/drivers/scsi/bfa/bfad_bsg.c @@ -2547,6 +2547,36 @@ bfad_iocmd_fcpim_cfg_lunmask(struct bfad_s *bfad, void *cmd, unsigned int v_cmd) return 0; } +int +bfad_iocmd_fcpim_throttle_query(struct bfad_s *bfad, void *cmd) +{ + struct bfa_bsg_fcpim_throttle_s *iocmd = + (struct bfa_bsg_fcpim_throttle_s *)cmd; + unsigned long flags; + + spin_lock_irqsave(&bfad->bfad_lock, flags); + iocmd->status = bfa_fcpim_throttle_get(&bfad->bfa, + (void *)&iocmd->throttle); + spin_unlock_irqrestore(&bfad->bfad_lock, flags); + + return 0; +} + +int +bfad_iocmd_fcpim_throttle_set(struct bfad_s *bfad, void *cmd) +{ + struct bfa_bsg_fcpim_throttle_s *iocmd = + (struct bfa_bsg_fcpim_throttle_s *)cmd; + unsigned long flags; + + spin_lock_irqsave(&bfad->bfad_lock, flags); + iocmd->status = bfa_fcpim_throttle_set(&bfad->bfa, + iocmd->throttle.cfg_value); + spin_unlock_irqrestore(&bfad->bfad_lock, flags); + + return 0; +} + static int bfad_iocmd_handler(struct bfad_s *bfad, unsigned int cmd, void *iocmd, unsigned int payload_len) @@ -2881,6 +2911,12 @@ bfad_iocmd_handler(struct bfad_s *bfad, unsigned int cmd, void *iocmd, case IOCMD_FCPIM_LUNMASK_DELETE: rc = bfad_iocmd_fcpim_cfg_lunmask(bfad, iocmd, cmd); break; + case IOCMD_FCPIM_THROTTLE_QUERY: + rc = bfad_iocmd_fcpim_throttle_query(bfad, iocmd); + break; + case IOCMD_FCPIM_THROTTLE_SET: + rc = bfad_iocmd_fcpim_throttle_set(bfad, iocmd); + break; default: rc = -EINVAL; break; diff --git a/drivers/scsi/bfa/bfad_bsg.h b/drivers/scsi/bfa/bfad_bsg.h index b67a2292cff3..37922b96079b 100644 --- a/drivers/scsi/bfa/bfad_bsg.h +++ b/drivers/scsi/bfa/bfad_bsg.h @@ -145,6 +145,8 @@ enum { IOCMD_DIAG_DPORT_DISABLE, IOCMD_DIAG_DPORT_GET_STATE, IOCMD_QOS_SET_BW, + IOCMD_FCPIM_THROTTLE_QUERY, + IOCMD_FCPIM_THROTTLE_SET }; struct bfa_bsg_gen_s { @@ -740,6 +742,13 @@ struct bfa_bsg_fcpim_lunmask_s { struct scsi_lun lun; }; +struct bfa_bsg_fcpim_throttle_s { + bfa_status_t status; + u16 bfad_num; + u16 vf_id; + struct bfa_defs_fcpim_throttle_s throttle; +}; + struct bfa_bsg_fcpt_s { bfa_status_t status; u16 vf_id; |