[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>
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 (*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 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_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_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__ */
