diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_mem.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_mem.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_mem.c b/drivers/scsi/lpfc/lpfc_mem.c index 32db255f5216..2437ec5f4863 100644 --- a/drivers/scsi/lpfc/lpfc_mem.c +++ b/drivers/scsi/lpfc/lpfc_mem.c @@ -763,3 +763,48 @@ lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) } return; } + +/** + * lpfc_rq_buf_free - Free a RQ DMA buffer + * @phba: HBA buffer is associated with + * @mp: Buffer to free + * + * Description: Frees the given DMA buffer in the appropriate way given by + * reposting it to its associated RQ so it can be reused. + * + * Notes: Takes phba->hbalock. Can be called with or without other locks held. + * + * Returns: None + **/ +void +lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) +{ + struct lpfc_rqb *rqbp; + struct lpfc_rqe hrqe; + struct lpfc_rqe drqe; + struct rqb_dmabuf *rqb_entry; + unsigned long flags; + int rc; + + if (!mp) + return; + + rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf); + rqbp = rqb_entry->hrq->rqbp; + + spin_lock_irqsave(&phba->hbalock, flags); + list_del(&rqb_entry->hbuf.list); + hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys); + hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys); + drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys); + drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys); + rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe); + if (rc < 0) { + (rqbp->rqb_free_buffer)(phba, rqb_entry); + } else { + list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list); + rqbp->buffer_count++; + } + + spin_unlock_irqrestore(&phba->hbalock, flags); +} |