From: Krishna Gudipati <kgudipat@xxxxxxxxxxx>
Change details:
- 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@xxxxxxxxxxx>
Signed-off-by: Krishna Gudipati <kgudipat@xxxxxxxxxxx>
---
drivers/scsi/bfa/bfa_core.c | 9 +++-
drivers/scsi/bfa/bfa_defs_svc.h | 13 +++++
drivers/scsi/bfa/bfa_fcpim.c | 105 ++++++++++++++++++++++++++++++++++++--
drivers/scsi/bfa/bfa_fcpim.h | 9 +++-
drivers/scsi/bfa/bfa_fcs_rport.c | 6 ++-
drivers/scsi/bfa/bfa_ioc.h | 3 +
drivers/scsi/bfa/bfad_bsg.c | 36 +++++++++++++
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 837879d..eb29628 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 18e4f6b..0e37e23 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 4118d84..27b5609 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 b81d51c..e693af6 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 e90800d..58ac643 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 47038da..6d772b4 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 90c40e4..6e1478a 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 b67a229..37922b9 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;
--
1.7.3.rc1
--
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